Not sure how I didn't put that in yet

Seems to work okay.

.gitignore

@@ -3,6 +3,7 @@ __pycache__
 *.egg-info
 *.pyc
 venv
+sitecustomize.py
 
 *.qmlc
 *.jsc

PKGBUILD

@@ -0,0 +1,79 @@
+# Maintainer: DrRac27 <drrac27 at riseup.net>
+
+pkgname=moment-git
+_name=moment
+pkgver=v0.7.3.r32.2af33fce
+pkgrel=1
+pkgdesc='A customizable, keyboard-operable Matrix client. Fork of Mirage'
+arch=('x86_64' 'i686' 'aarch64')
+url='https://mx-moment.xyz/'
+license=('LGPL3')
+depends=(
+    'qt5-base'
+    'qt5-declarative'
+    'qt5-quickcontrols2'
+    'qt5-svg'
+    'qt5-graphicaleffects'
+    'qt5-imageformats'
+    'python'
+    'python-pyotherside'
+    'libolm'
+    'libjpeg-turbo'
+    'zlib'
+    'libtiff'
+    'libwebp'
+    'openjpeg2'
+    'libmediainfo'
+    'python-pillow'
+    'python-pymediainfo'
+    'python-cairosvg'
+    'python-aiofiles'
+    'python-appdirs'
+    'python-filetype'
+    'python-html-sanitizer'
+    'python-lxml'
+    'python-mistune>=2'
+    'python-matrix-nio'
+    'libxss'
+    'python-plyer'
+    'python-sortedcontainers'
+    'python-watchgod'
+    'python-redbaron'
+    'dbus-python'
+    'python-hsluv'
+    'python-pycryptodome'
+    'python-simpleaudio'
+    'python-olm'
+    'python-cachetools'
+    'python-atomicwrites'
+    'python-peewee'
+)
+makedepends=('cmake' 'git')
+provides=('moment')
+conflicts=('moment')
+source=('git+https://gitlab.com/mx-moment/moment.git')
+sha256sums=('SKIP')
+
+prepare() {
+    cd "${srcdir}/${_name}"
+    git submodule update --init --recursive
+}
+
+pkgver() {
+    cd "${srcdir}/${_name}"
+    local tag=$(git tag --sort=-v:refname | head -1)
+    local commits_since=$(git rev-list $tag..HEAD --count)
+    echo "$tag.r$commits_since.$(git log --pretty=format:'%h' -n 1)"
+}
+
+build() {
+    cd "${srcdir}/${_name}"
+    make clean || true
+    qmake PREFIX=/usr moment.pro
+    make
+}
+
+package() {
+    cd "${srcdir}/${_name}"
+    make INSTALL_ROOT="${pkgdir}" install
+}

autoreload.py

@@ -11,6 +11,7 @@ Use `pip3 install --user -U requirements-dev.txt` before running this."""
 
 import os
 import subprocess
+import shutil
 import sys
 from contextlib import suppress
 from pathlib import Path
@@ -22,42 +23,47 @@ ROOT = Path(__file__).parent
 
 
 class Watcher(DefaultWatcher):
-    def accept_change(self, entry: os.DirEntry) -> bool:
-        path = Path(entry.path)
+	def accept_change(self, entry: os.DirEntry) -> bool:
+		path = Path(entry.path)
 
-        for bad in ("src/config", "src/themes"):
-            if path.is_relative_to(ROOT / bad):
-                return False
+		for bad in ("src/config", "src/themes"):
+			if path.is_relative_to(ROOT / bad):
+				return False
 
-        for good in ("src", "submodules"):
-            if path.is_relative_to(ROOT / good):
-                return True
+		for good in ("src", "submodules"):
+			if path.is_relative_to(ROOT / good):
+				return True
 
-        return False
+		return False
 
-    def should_watch_dir(self, entry: os.DirEntry) -> bool:
-        return super().should_watch_dir(entry) and self.accept_change(entry)
+	def should_watch_dir(self, entry: os.DirEntry) -> bool:
+		return super().should_watch_dir(entry) and self.accept_change(entry)
 
-    def should_watch_file(self, entry: os.DirEntry) -> bool:
-        return super().should_watch_file(entry) and self.accept_change(entry)
+	def should_watch_file(self, entry: os.DirEntry) -> bool:
+		return super().should_watch_file(entry) and self.accept_change(entry)
 
 
 def cmd(*parts) -> subprocess.CompletedProcess:
-    return subprocess.run(parts, cwd=ROOT, check=True)
+	return subprocess.run(parts, cwd=ROOT, check=True)
 
 
 def run_app(args=sys.argv[1:]) -> None:
-    print("\n\x1b[36m", "─" * term_size().columns, "\x1b[0m\n", sep="")
+	print("\n\x1b[36m", "─" * term_size().columns, "\x1b[0m\n", sep="")
 
-    with suppress(KeyboardInterrupt):
-        cmd("qmake", "moment.pro", "CONFIG+=dev")
-        cmd("make")
-        cmd("./moment", "-name", "dev", *args)
+	if shutil.which("qmake-qt5"):
+		QMAKE_CMD = "qmake-qt5"
+	else:
+		QMAKE_CMD = "qmake"
+
+	with suppress(KeyboardInterrupt):
+		cmd(QMAKE_CMD, "moment.pro", "CONFIG+=dev")
+		cmd("make")
+		cmd("./moment", "-name", "dev", *args)
 
 
 if __name__ == "__main__":
-    if len(sys.argv) > 2 and sys.argv[1] in ("-h", "--help"):
-        print(__doc__)
-    else:
-        (ROOT / "Makefile").exists() and cmd("make", "clean")
-        run_process(ROOT, run_app, callback=print, watcher_cls=Watcher)
+	if len(sys.argv) > 2 and sys.argv[1] in ("-h", "--help"):
+		print(__doc__)
+	else:
+		(ROOT / "Makefile").exists() and cmd("make", "clean")
+		run_process(ROOT, run_app, callback=print, watcher_cls=Watcher)

docs/CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+- [0.7.5 (2024-03-07)](#075-2024-03-07)
+- [0.7.4 (2024-01-04)](#074-2024-01-04)
 - [0.7.3 (2022-01-31)](#073-2022-01-31)
 - [0.7.2 (2021-07-26)](#072-2021-07-26)
 - [0.7.1 (2021-03-04)](#071-2021-03-04)
@@ -24,6 +26,58 @@ and this project adheres to
 - [0.4.0 (2020-03-21)](#040-2020-03-21)
 
 
+## 0.7.5 (2024-03-07)
+
+### Added
+
+  - Added emoji processing, for example `:eyes:`
+
+  - Added /react command, to add (emoji) reactions
+
+  - Added displaying of spoiler tags
+
+  - Added /spoiler and /unspoiler commands
+
+### Changed
+
+  - Now using Mistune 3
+
+### Fixed
+
+  - Fixed profile picture flickering in account settings UI
+
+  - Fixed overlaying tabs glitch in many UIs
+
+  - Fixed some issues when running on OpenBSD
+
+## 0.7.4 (2024-01-04)
+
+### Added
+
+  - Display emoji reactions on messages
+
+  - Display edited messages properly
+
+### Changed
+
+  - Changed command line argument processing
+
+  - Changed server listing to use servers.joinmatrix.org
+
+  - Now using Mistune 2.0.2
+
+  - Now using upstream matrix-nio (instead of fork)
+
+### Removed
+
+  - Almost all UI animations were removed
+
+### Fixed
+
+  - Fixed restoring from tray
+
+  - Updated installation instructions
+
 ## 0.7.3 (2022-01-31)
 
 ### Added

docs/INSTALL.md

@@ -25,6 +25,7 @@ but compiling on Windows and macOS should be possible with the right tools.
   - [Common issues](#common-issues)
     - [cffi version mismatch](#cffi-version-mismatch)
     - [Type XYZ unavailable](#type-xyz-unavailable)
+    - [libimagequant.so.0: cannot open shared object file: No such file or directory](#libimagequantso0-cannot-open-shared-object-file-no-such-file-or-directory)
     
 
 ## Packages
@@ -379,3 +380,12 @@ sudo chmod 755 /usr/lib/qt5/qml/io/thp/pyotherside/*.so
 
 Note that the Qt lib path might be `/usr/lib/qt/` instead of `/usr/lib/qt5/`,
 depending on the distro.
+
+#### libimagequant.so.0: cannot open shared object file: No such file or directory
+
+Solution from [here](https://stackoverflow.com/questions/77499381/libimagequant-so-0-cannot-open-shared-object-file-no-such-file-or-directory) works.
+
+```sh
+sudo ln /lib/libimagequant.so.0.4 /lib/libimagequant.so.0
+```
+

packaging/flatpak/collector.py

@@ -2,31 +2,31 @@ import json
 import yaml
 
 with open("moment.flatpak.base.yaml") as f:
-    base = yaml.load(f, Loader=yaml.FullLoader)
+	base = yaml.load(f, Loader=yaml.FullLoader)
 
 with open("flatpak-pip.json") as f:
-    modules = json.load(f)["modules"]
+	modules = json.load(f)["modules"]
 
 # set some modules in front as dependencies and dropping matrix-nio
 # which is declared separately
 front = []
 back = []
 for m in modules:
-    n = m["name"]
-    if n.startswith("python3-") and \
-       n[len("python3-"):] in ["cffi", "importlib-metadata", "multidict", "pytest-runner", "setuptools-scm"]:
-        front.append(m)
-    else:
-        back.append(m)
+	n = m["name"]
+	if n.startswith("python3-") and \
+	   n[len("python3-"):] in ["cffi", "importlib-metadata", "multidict", "pytest-runner", "setuptools-scm"]:
+		front.append(m)
+	else:
+		back.append(m)
 
 # replace placeholder with modules
 phold = None
 for i in range(len(base["modules"])):
-    if base["modules"][i]["name"] == "PLACEHOLDER PYTHON DEPENDENCIES":
-        phold = i
-        break
+	if base["modules"][i]["name"] == "PLACEHOLDER PYTHON DEPENDENCIES":
+		phold = i
+		break
 
 base["modules"] = base["modules"][:i] + front + back + base["modules"][i+1:]
 
 with open("moment.flatpak.yaml", "w") as f:
-    f.write(yaml.dump(base, sort_keys=False, indent=2))
+	f.write(yaml.dump(base, sort_keys=False, indent=2))

packaging/moment.metainfo.xml

@@ -23,6 +23,9 @@
   <provides>
     <binary>moment</binary>
   </provides>
+  <requires>
+    <display_length compare="ge">360</display_length>
+  </requires>
   <project_license>LGPL-3.0-or-later</project_license>
   <screenshots>
     <screenshot type="default">
@@ -56,6 +59,8 @@
   </screenshots>
   <metadata_license>FSFAP</metadata_license>
   <releases>
+    <release version="0.7.5" date="2024-03-07"/>
+    <release version="0.7.4" date="2024-01-04"/>
     <release version="0.7.3" date="2022-01-31"/>
     <release version="0.7.2" date="2021-07-26"/>
     <release version="0.7.1" date="2021-03-04"/>
@@ -73,8 +78,4 @@
     <release version="0.4.1" date="2020-03-23"/>
     <release version="0.4.0" date="2020-03-21"/>
   </releases>
-  <custom>
-    <value key="Purism::form_factor">workstation</value>
-    <value key="Purism::form_factor">mobile</value>
-  </custom>
 </component>

packaging/update-metainfo-releases.py

@@ -4,29 +4,29 @@ import html
 import re
 from pathlib import Path
 
-root          = Path(__file__).resolve().parent.parent
+root		  = Path(__file__).resolve().parent.parent
 title_pattern = re.compile(r"## (\d+\.\d+\.\d+) \((\d{4}-\d\d-\d\d)\)")
 release_lines = ["  <releases>"]
 
 for line in (root / "docs" / "CHANGELOG.md").read_text().splitlines():
-    match = title_pattern.match(line)
+	match = title_pattern.match(line)
 
-    if match:
-        args = (html.escape(match.group(1)), html.escape(match.group(2)))
-        release_lines.append('    <release version="%s" date="%s"/>' % args)
+	if match:
+		args = (html.escape(match.group(1)), html.escape(match.group(2)))
+		release_lines.append('	<release version="%s" date="%s"/>' % args)
 
-appdata     = root / "packaging" / "moment.metainfo.xml"
+appdata	 = root / "packaging" / "moment.metainfo.xml"
 in_releases = False
 final_lines = []
 
 for line in appdata.read_text().splitlines():
-    if line == "  <releases>":
-        in_releases = True
-        final_lines += release_lines
-    elif line == "  </releases>":
-        in_releases = False
+	if line == "  <releases>":
+		in_releases = True
+		final_lines += release_lines
+	elif line == "  </releases>":
+		in_releases = False
 
-    if not in_releases:
-        final_lines.append(line)
+	if not in_releases:
+		final_lines.append(line)
 
 appdata.write_text("\n".join(final_lines))

requirements-dev.txt

@@ -1,15 +1,15 @@
 remote_pdb >= 2.0.0,  < 3
 pdbpp      >= 0.10.2, < 0.11
-devtools   >= 0.4.0,  < 0.5
+devtools   >= 0.12.0,  < 0.13
 
-mypy                  >= 0.812,  < 0.900
-flake8                >= 3.8.4,  < 4
-flake8-isort          >= 4.0.0,  < 5
-flake8-bugbear        >= 20.1.4, < 21
-flake8-commas         >= 2.0.0,  < 3
-flake8-comprehensions >= 3.3.0,  < 4
-flake8-executable     >= 2.0.4,  < 3
-flake8-logging-format >= 0.6.0,  < 0.7
-flake8-pie            >= 0.6.1,  < 0.7
-flake8-quotes         >= 3.2.0,  < 4
-flake8-colors         >= 0.1.6,  < 0.2
+mypy                  >= 1.7.0,   < 1.8
+flake8                >= 6.1.0,   < 7
+flake8-isort          >= 6.1.0,   < 7
+flake8-bugbear        >= 23.12.0, < 24
+flake8-commas         >= 2.0.0,   < 3
+flake8-comprehensions >= 3.3.0,   < 4
+flake8-executable     >= 2.0.4,   < 3
+flake8-logging-format >= 0.9.0,   < 1
+flake8-pie            >= 0.16.0,  < 1
+flake8-quotes         >= 3.2.0,   < 4
+flake8-colors         >= 0.1.6,   < 0.2

requirements.txt

@@ -2,11 +2,12 @@ Pillow            >= 7.0.0,  < 9
 aiofiles          >= 0.4.0,  < 24.0.0
 appdirs           >= 1.4.4,  < 2
 cairosvg          >= 2.4.2,  < 3
+emoji             >= 2.0,    < 3.0
 filetype          >= 1.0.7,  < 2
-html_sanitizer    >= 1.9.1,  < 2
-lxml              >= 4.5.1,  < 5
-mistune           >= 2.0.0,  < 3.0
-pymediainfo       >= 4.2.1,  < 5
+html_sanitizer    >= 1.9.1,  < 3
+lxml              >= 4.5.1,  < 6
+mistune           >= 2.0.0,  < 4.0
+pymediainfo       >= 4.2.1,  < 7
 plyer             >= 1.4.3,  < 2
 sortedcontainers  >= 2.2.2,  < 3
 watchgod          >= 0.7,    < 0.8
@@ -14,7 +15,7 @@ redbaron          >= 0.9.2,  < 1
 hsluv             >= 5.0.0,  < 6
 simpleaudio       >= 1.0.4,  < 2
 dbus-python       >= 1.2.16, < 2; platform_system == "Linux"
-matrix-nio[e2e]   >= 0.20.1, < 1.0.0
+matrix-nio[e2e]   >= 0.22.0, < 0.24
 
 async_generator   >= 1.10,  < 2;   python_version < "3.7"
 dataclasses       >= 0.6,   < 0.7; python_version < "3.7"

src/backend/__init__.py

@@ -13,7 +13,7 @@ documentation in the following modules first:
 - `nio_callbacks`
 """
 
-__app_name__     = "moment"
+__app_name__	 = "moment"
 __display_name__ = "Moment"
 __reverse_dns__  = "xyz.mx-moment"
-__version__      = "0.7.3"
+__version__      = "0.7.5"

src/backend/color.py

@@ -17,442 +17,442 @@ ColorTuple = Tuple[float, float, float, float]
 
 @dataclass(repr=False)
 class Color:
-    """A color manipulable in HSLuv, HSL, RGB, hexadecimal and by SVG name.
+	"""A color manipulable in HSLuv, HSL, RGB, hexadecimal and by SVG name.
 
-    The `Color` object constructor accepts hexadecimal string
-    ("#RGB", "#RRGGBB" or "#RRGGBBAA") or another `Color` to copy.
+	The `Color` object constructor accepts hexadecimal string
+	("#RGB", "#RRGGBB" or "#RRGGBBAA") or another `Color` to copy.
 
-    Attributes representing the color in HSLuv, HSL, RGB, hexadecimal and
-    SVG name formats can be accessed and modified on these `Color` objects.
+	Attributes representing the color in HSLuv, HSL, RGB, hexadecimal and
+	SVG name formats can be accessed and modified on these `Color` objects.
 
-    The `hsluv()`/`hsluva()`, `hsl()`/`hsla()` and `rgb()`/`rgba()`
-    functions in this module are provided to create an object by specifying
-    a color in other formats.
+	The `hsluv()`/`hsluva()`, `hsl()`/`hsla()` and `rgb()`/`rgba()`
+	functions in this module are provided to create an object by specifying
+	a color in other formats.
 
-    Copies of objects with modified attributes can be created with the
-    with the `Color.but()`, `Color.plus()` and `Copy.times()` methods.
+	Copies of objects with modified attributes can be created with the
+	with the `Color.but()`, `Color.plus()` and `Copy.times()` methods.
 
-    If the `hue` is outside of the normal 0-359 range, the number is
-    interpreted as `hue % 360`, e.g.  `360` is `0`, `460` is `100`,
-    or `-20` is `340`.
-    """
+	If the `hue` is outside of the normal 0-359 range, the number is
+	interpreted as `hue % 360`, e.g.  `360` is `0`, `460` is `100`,
+	or `-20` is `340`.
+	"""
 
-    # The saturation and luv are properties due to the need for a setter
-    # capping the value between 0-100, as hsluv handles numbers outside
-    # this range incorrectly.
+	# The saturation and luv are properties due to the need for a setter
+	# capping the value between 0-100, as hsluv handles numbers outside
+	# this range incorrectly.
 
-    color_or_hex: InitVar[str] = "#00000000"
-    hue:          float        = field(init=False, default=0)
-    _saturation:  float        = field(init=False, default=0)
-    _luv:         float        = field(init=False, default=0)
-    alpha:        float        = field(init=False, default=1)
+	color_or_hex: InitVar[str] = "#00000000"
+	hue:		  float		= field(init=False, default=0)
+	_saturation:  float		= field(init=False, default=0)
+	_luv:		 float		= field(init=False, default=0)
+	alpha:		float		= field(init=False, default=1)
 
-    def __post_init__(self, color_or_hex: Union["Color", str]) -> None:
-        if isinstance(color_or_hex, Color):
-            hsluva = color_or_hex.hsluva
-            self.hue, self.saturation, self.luv, self.alpha = hsluva
-        else:
-            self.hex = color_or_hex
+	def __post_init__(self, color_or_hex: Union["Color", str]) -> None:
+		if isinstance(color_or_hex, Color):
+			hsluva = color_or_hex.hsluva
+			self.hue, self.saturation, self.luv, self.alpha = hsluva
+		else:
+			self.hex = color_or_hex
 
-    # HSLuv
+	# HSLuv
 
-    @property
-    def hsluva(self) -> ColorTuple:
-        return (self.hue, self.saturation, self.luv, self.alpha)
+	@property
+	def hsluva(self) -> ColorTuple:
+		return (self.hue, self.saturation, self.luv, self.alpha)
 
-    @hsluva.setter
-    def hsluva(self, value: ColorTuple) -> None:
-        self.hue, self.saturation, self.luv, self.alpha = value
+	@hsluva.setter
+	def hsluva(self, value: ColorTuple) -> None:
+		self.hue, self.saturation, self.luv, self.alpha = value
 
-    @property
-    def saturation(self) -> float:
-        return self._saturation
+	@property
+	def saturation(self) -> float:
+		return self._saturation
 
-    @saturation.setter
-    def saturation(self, value: float) -> None:
-        self._saturation = max(0, min(100, value))
+	@saturation.setter
+	def saturation(self, value: float) -> None:
+		self._saturation = max(0, min(100, value))
 
-    @property
-    def luv(self) -> float:
-        return self._luv
+	@property
+	def luv(self) -> float:
+		return self._luv
 
-    @luv.setter
-    def luv(self, value: float) -> None:
-        self._luv = max(0, min(100, value))
+	@luv.setter
+	def luv(self, value: float) -> None:
+		self._luv = max(0, min(100, value))
 
-    # HSL
+	# HSL
 
-    @property
-    def hsla(self) -> ColorTuple:
-        r, g, b = (self.red / 255, self.green / 255, self.blue / 255)
-        h, l, s = colorsys.rgb_to_hls(r, g, b)
-        return (h * 360, s * 100, l * 100, self.alpha)
+	@property
+	def hsla(self) -> ColorTuple:
+		r, g, b = (self.red / 255, self.green / 255, self.blue / 255)
+		h, l, s = colorsys.rgb_to_hls(r, g, b)
+		return (h * 360, s * 100, l * 100, self.alpha)
 
-    @hsla.setter
-    def hsla(self, value: ColorTuple) -> None:
-        h, s, l   = (value[0] / 360, value[1] / 100, value[2] / 100)  # noqa
-        r, g, b   = colorsys.hls_to_rgb(h, l, s)
-        self.rgba = (r * 255, g * 255, b * 255, value[3])
+	@hsla.setter
+	def hsla(self, value: ColorTuple) -> None:
+		h, s, l   = (value[0] / 360, value[1] / 100, value[2] / 100)  # noqa
+		r, g, b   = colorsys.hls_to_rgb(h, l, s)
+		self.rgba = (r * 255, g * 255, b * 255, value[3])
 
-    @property
-    def light(self) -> float:
-        return self.hsla[2]
+	@property
+	def light(self) -> float:
+		return self.hsla[2]
 
-    @light.setter
-    def light(self, value: float) -> None:
-        self.hsla = (self.hue, self.saturation, value, self.alpha)
+	@light.setter
+	def light(self, value: float) -> None:
+		self.hsla = (self.hue, self.saturation, value, self.alpha)
 
-    # RGB
+	# RGB
 
-    @property
-    def rgba(self) -> ColorTuple:
-        r, g, b = hsluv_to_rgb(self.hsluva)
-        return r * 255, g * 255, b * 255, self.alpha
+	@property
+	def rgba(self) -> ColorTuple:
+		r, g, b = hsluv_to_rgb(self.hsluva)
+		return r * 255, g * 255, b * 255, self.alpha
 
-    @rgba.setter
-    def rgba(self, value: ColorTuple) -> None:
-        r, g, b     = (value[0] / 255, value[1] / 255, value[2] / 255)
-        self.hsluva = rgb_to_hsluv((r, g, b)) + (self.alpha,)
+	@rgba.setter
+	def rgba(self, value: ColorTuple) -> None:
+		r, g, b	 = (value[0] / 255, value[1] / 255, value[2] / 255)
+		self.hsluva = rgb_to_hsluv((r, g, b)) + (self.alpha,)
 
-    @property
-    def red(self) -> float:
-        return self.rgba[0]
+	@property
+	def red(self) -> float:
+		return self.rgba[0]
 
-    @red.setter
-    def red(self, value: float) -> None:
-        self.rgba = (value, self.green, self.blue, self.alpha)
+	@red.setter
+	def red(self, value: float) -> None:
+		self.rgba = (value, self.green, self.blue, self.alpha)
 
-    @property
-    def green(self) -> float:
-        return self.rgba[1]
+	@property
+	def green(self) -> float:
+		return self.rgba[1]
 
-    @green.setter
-    def green(self, value: float) -> None:
-        self.rgba = (self.red, value, self.blue, self.alpha)
+	@green.setter
+	def green(self, value: float) -> None:
+		self.rgba = (self.red, value, self.blue, self.alpha)
 
-    @property
-    def blue(self) -> float:
-        return self.rgba[2]
+	@property
+	def blue(self) -> float:
+		return self.rgba[2]
 
-    @blue.setter
-    def blue(self, value: float) -> None:
-        self.rgba = (self.red, self.green, value, self.alpha)
+	@blue.setter
+	def blue(self, value: float) -> None:
+		self.rgba = (self.red, self.green, value, self.alpha)
 
-    # Hexadecimal
+	# Hexadecimal
 
-    @property
-    def hex(self) -> str:
-        rgb   = hsluv_to_hex(self.hsluva)
-        alpha = builtins.hex(int(self.alpha * 255))[2:]
-        alpha = f"0{alpha}" if len(alpha) == 1 else alpha
-        return f"{alpha if self.alpha < 1 else ''}{rgb}".lower()
+	@property
+	def hex(self) -> str:
+		rgb   = hsluv_to_hex(self.hsluva)
+		alpha = builtins.hex(int(self.alpha * 255))[2:]
+		alpha = f"0{alpha}" if len(alpha) == 1 else alpha
+		return f"{alpha if self.alpha < 1 else ''}{rgb}".lower()
 
-    @hex.setter
-    def hex(self, value: str) -> None:
-        if len(value) == 4:
-            template = "#{r}{r}{g}{g}{b}{b}"
-            value    = template.format(r=value[1], g=value[2], b=value[3])
+	@hex.setter
+	def hex(self, value: str) -> None:
+		if len(value) == 4:
+			template = "#{r}{r}{g}{g}{b}{b}"
+			value	= template.format(r=value[1], g=value[2], b=value[3])
 
-        alpha = int(value[-2:] if len(value) == 9 else "ff", 16) / 255
+		alpha = int(value[-2:] if len(value) == 9 else "ff", 16) / 255
 
-        self.hsluva = hex_to_hsluv(value) + (alpha,)
+		self.hsluva = hex_to_hsluv(value) + (alpha,)
 
-    # name color
+	# name color
 
-    @property
-    def name(self) -> Optional[str]:
-        try:
-            return SVGColor(self.hex).name
-        except ValueError:
-            return None
+	@property
+	def name(self) -> Optional[str]:
+		try:
+			return SVGColor(self.hex).name
+		except ValueError:
+			return None
 
-    @name.setter
-    def name(self, value: str) -> None:
-        self.hex = SVGColor[value.lower()].value.hex
+	@name.setter
+	def name(self, value: str) -> None:
+		self.hex = SVGColor[value.lower()].value.hex
 
-    # Other methods
+	# Other methods
 
-    def __repr__(self) -> str:
-        r, g, b   = int(self.red), int(self.green), int(self.blue)
-        h, s, luv = int(self.hue), int(self.saturation), int(self.luv)
-        l         = int(self.light)  # noqa
-        a         = self.alpha
-        block     = f"\x1b[38;2;{r};{g};{b}m█████\x1b[0m"
-        sep       = "\x1b[1;33m/\x1b[0m"
-        end       = f" {sep} {self.name}" if self.name else ""
-        # Need a terminal with true color support to render the block!
-        return (
-            f"{block} hsluva({h}, {s}, {luv}, {a}) {sep} "
-            f"hsla({h}, {s}, {l}, {a}) {sep} rgba({r}, {g}, {b}, {a}) {sep} "
-            f"{self.hex}{end}"
-        )
+	def __repr__(self) -> str:
+		r, g, b   = int(self.red), int(self.green), int(self.blue)
+		h, s, luv = int(self.hue), int(self.saturation), int(self.luv)
+		l		 = int(self.light)  # noqa
+		a		 = self.alpha
+		block	 = f"\x1b[38;2;{r};{g};{b}m█████\x1b[0m"
+		sep	   = "\x1b[1;33m/\x1b[0m"
+		end	   = f" {sep} {self.name}" if self.name else ""
+		# Need a terminal with true color support to render the block!
+		return (
+			f"{block} hsluva({h}, {s}, {luv}, {a}) {sep} "
+			f"hsla({h}, {s}, {l}, {a}) {sep} rgba({r}, {g}, {b}, {a}) {sep} "
+			f"{self.hex}{end}"
+		)
 
-    def but(
-        self,
-        hue:        Optional[float]      = None,
-        saturation: Optional[float]      = None,
-        luv:        Optional[float]      = None,
-        alpha:      Optional[float]      = None,
-        *,
-        hsluva:     Optional[ColorTuple] = None,
-        hsla:       Optional[ColorTuple] = None,
-        rgba:       Optional[ColorTuple] = None,
-        hex:        Optional[str]        = None,
-        name:       Optional[str]        = None,
-        light:      Optional[float]      = None,
-        red:        Optional[float]      = None,
-        green:      Optional[float]      = None,
-        blue:       Optional[float]      = None,
-    ) -> "Color":
-        """Return a copy of this `Color` with overriden attributes.
+	def but(
+		self,
+		hue:		Optional[float]	  = None,
+		saturation: Optional[float]	  = None,
+		luv:		Optional[float]	  = None,
+		alpha:	  Optional[float]	  = None,
+		*,
+		hsluva:	 Optional[ColorTuple] = None,
+		hsla:	   Optional[ColorTuple] = None,
+		rgba:	   Optional[ColorTuple] = None,
+		hex:		Optional[str]		= None,
+		name:	   Optional[str]		= None,
+		light:	  Optional[float]	  = None,
+		red:		Optional[float]	  = None,
+		green:	  Optional[float]	  = None,
+		blue:	   Optional[float]	  = None,
+	) -> "Color":
+		"""Return a copy of this `Color` with overriden attributes.
 
-        Example:
-        >>> first  = Color(100, 50, 50)
-        >>> second = c.but(hue=20, saturation=100)
-        >>> second.hsluva
-        (20, 50, 100, 1)
-        """
+		Example:
+		>>> first  = Color(100, 50, 50)
+		>>> second = c.but(hue=20, saturation=100)
+		>>> second.hsluva
+		(20, 50, 100, 1)
+		"""
 
-        new = copy(self)
+		new = copy(self)
 
-        for arg, value in locals().items():
-            if arg not in ("new", "self") and value is not None:
-                setattr(new, arg, value)
+		for arg, value in locals().items():
+			if arg not in ("new", "self") and value is not None:
+				setattr(new, arg, value)
 
-        return new
+		return new
 
-    def plus(
-        self,
-        hue:        Optional[float] = None,
-        saturation: Optional[float] = None,
-        luv:        Optional[float] = None,
-        alpha:      Optional[float] = None,
-        *,
-        light:      Optional[float] = None,
-        red:        Optional[float] = None,
-        green:      Optional[float] = None,
-        blue:       Optional[float] = None,
-    ) -> "Color":
-        """Return a copy of this `Color` with values added to attributes.
+	def plus(
+		self,
+		hue:		Optional[float] = None,
+		saturation: Optional[float] = None,
+		luv:		Optional[float] = None,
+		alpha:	  Optional[float] = None,
+		*,
+		light:	  Optional[float] = None,
+		red:		Optional[float] = None,
+		green:	  Optional[float] = None,
+		blue:	   Optional[float] = None,
+	) -> "Color":
+		"""Return a copy of this `Color` with values added to attributes.
 
-        Example:
-        >>> first  = Color(100, 50, 50)
-        >>> second = c.plus(hue=10, saturation=-20)
-        >>> second.hsluva
-        (110, 30, 50, 1)
-        """
+		Example:
+		>>> first  = Color(100, 50, 50)
+		>>> second = c.plus(hue=10, saturation=-20)
+		>>> second.hsluva
+		(110, 30, 50, 1)
+		"""
 
-        new = copy(self)
+		new = copy(self)
 
-        for arg, value in locals().items():
-            if arg not in ("new", "self") and value is not None:
-                setattr(new, arg, getattr(self, arg) + value)
+		for arg, value in locals().items():
+			if arg not in ("new", "self") and value is not None:
+				setattr(new, arg, getattr(self, arg) + value)
 
-        return new
+		return new
 
-    def times(
-        self,
-        hue:        Optional[float] = None,
-        saturation: Optional[float] = None,
-        luv:        Optional[float] = None,
-        alpha:      Optional[float] = None,
-        *,
-        light:      Optional[float] = None,
-        red:        Optional[float] = None,
-        green:      Optional[float] = None,
-        blue:       Optional[float] = None,
-    ) -> "Color":
-        """Return a copy of this `Color` with multiplied attributes.
+	def times(
+		self,
+		hue:		Optional[float] = None,
+		saturation: Optional[float] = None,
+		luv:		Optional[float] = None,
+		alpha:	  Optional[float] = None,
+		*,
+		light:	  Optional[float] = None,
+		red:		Optional[float] = None,
+		green:	  Optional[float] = None,
+		blue:	   Optional[float] = None,
+	) -> "Color":
+		"""Return a copy of this `Color` with multiplied attributes.
 
-        Example:
-        >>> first  = Color(100, 50, 50, 0.8)
-        >>> second = c.times(luv=2, alpha=0.5)
-        >>> second.hsluva
-        (100, 50, 100, 0.4)
-        """
+		Example:
+		>>> first  = Color(100, 50, 50, 0.8)
+		>>> second = c.times(luv=2, alpha=0.5)
+		>>> second.hsluva
+		(100, 50, 100, 0.4)
+		"""
 
-        new = copy(self)
+		new = copy(self)
 
-        for arg, value in locals().items():
-            if arg not in ("new", "self") and value is not None:
-                setattr(new, arg, getattr(self, arg) * value)
+		for arg, value in locals().items():
+			if arg not in ("new", "self") and value is not None:
+				setattr(new, arg, getattr(self, arg) * value)
 
-        return new
+		return new
 
 
 class SVGColor(Enum):
-    """Standard SVG/HTML/CSS colors, with the addition of `transparent`."""
+	"""Standard SVG/HTML/CSS colors, with the addition of `transparent`."""
 
-    aliceblue            = Color("#f0f8ff")
-    antiquewhite         = Color("#faebd7")
-    aqua                 = Color("#00ffff")
-    aquamarine           = Color("#7fffd4")
-    azure                = Color("#f0ffff")
-    beige                = Color("#f5f5dc")
-    bisque               = Color("#ffe4c4")
-    black                = Color("#000000")
-    blanchedalmond       = Color("#ffebcd")
-    blue                 = Color("#0000ff")
-    blueviolet           = Color("#8a2be2")
-    brown                = Color("#a52a2a")
-    burlywood            = Color("#deb887")
-    cadetblue            = Color("#5f9ea0")
-    chartreuse           = Color("#7fff00")
-    chocolate            = Color("#d2691e")
-    coral                = Color("#ff7f50")
-    cornflowerblue       = Color("#6495ed")
-    cornsilk             = Color("#fff8dc")
-    crimson              = Color("#dc143c")
-    cyan                 = Color("#00ffff")
-    darkblue             = Color("#00008b")
-    darkcyan             = Color("#008b8b")
-    darkgoldenrod        = Color("#b8860b")
-    darkgray             = Color("#a9a9a9")
-    darkgreen            = Color("#006400")
-    darkgrey             = Color("#a9a9a9")
-    darkkhaki            = Color("#bdb76b")
-    darkmagenta          = Color("#8b008b")
-    darkolivegreen       = Color("#556b2f")
-    darkorange           = Color("#ff8c00")
-    darkorchid           = Color("#9932cc")
-    darkred              = Color("#8b0000")
-    darksalmon           = Color("#e9967a")
-    darkseagreen         = Color("#8fbc8f")
-    darkslateblue        = Color("#483d8b")
-    darkslategray        = Color("#2f4f4f")
-    darkslategrey        = Color("#2f4f4f")
-    darkturquoise        = Color("#00ced1")
-    darkviolet           = Color("#9400d3")
-    deeppink             = Color("#ff1493")
-    deepskyblue          = Color("#00bfff")
-    dimgray              = Color("#696969")
-    dimgrey              = Color("#696969")
-    dodgerblue           = Color("#1e90ff")
-    firebrick            = Color("#b22222")
-    floralwhite          = Color("#fffaf0")
-    forestgreen          = Color("#228b22")
-    fuchsia              = Color("#ff00ff")
-    gainsboro            = Color("#dcdcdc")
-    ghostwhite           = Color("#f8f8ff")
-    gold                 = Color("#ffd700")
-    goldenrod            = Color("#daa520")
-    gray                 = Color("#808080")
-    green                = Color("#008000")
-    greenyellow          = Color("#adff2f")
-    grey                 = Color("#808080")
-    honeydew             = Color("#f0fff0")
-    hotpink              = Color("#ff69b4")
-    indianred            = Color("#cd5c5c")
-    indigo               = Color("#4b0082")
-    ivory                = Color("#fffff0")
-    khaki                = Color("#f0e68c")
-    lavender             = Color("#e6e6fa")
-    lavenderblush        = Color("#fff0f5")
-    lawngreen            = Color("#7cfc00")
-    lemonchiffon         = Color("#fffacd")
-    lightblue            = Color("#add8e6")
-    lightcoral           = Color("#f08080")
-    lightcyan            = Color("#e0ffff")
-    lightgoldenrodyellow = Color("#fafad2")
-    lightgray            = Color("#d3d3d3")
-    lightgreen           = Color("#90ee90")
-    lightgrey            = Color("#d3d3d3")
-    lightpink            = Color("#ffb6c1")
-    lightsalmon          = Color("#ffa07a")
-    lightseagreen        = Color("#20b2aa")
-    lightskyblue         = Color("#87cefa")
-    lightslategray       = Color("#778899")
-    lightslategrey       = Color("#778899")
-    lightsteelblue       = Color("#b0c4de")
-    lightyellow          = Color("#ffffe0")
-    lime                 = Color("#00ff00")
-    limegreen            = Color("#32cd32")
-    linen                = Color("#faf0e6")
-    magenta              = Color("#ff00ff")
-    maroon               = Color("#800000")
-    mediumaquamarine     = Color("#66cdaa")
-    mediumblue           = Color("#0000cd")
-    mediumorchid         = Color("#ba55d3")
-    mediumpurple         = Color("#9370db")
-    mediumseagreen       = Color("#3cb371")
-    mediumslateblue      = Color("#7b68ee")
-    mediumspringgreen    = Color("#00fa9a")
-    mediumturquoise      = Color("#48d1cc")
-    mediumvioletred      = Color("#c71585")
-    midnightblue         = Color("#191970")
-    mintcream            = Color("#f5fffa")
-    mistyrose            = Color("#ffe4e1")
-    moccasin             = Color("#ffe4b5")
-    navajowhite          = Color("#ffdead")
-    navy                 = Color("#000080")
-    oldlace              = Color("#fdf5e6")
-    olive                = Color("#808000")
-    olivedrab            = Color("#6b8e23")
-    orange               = Color("#ffa500")
-    orangered            = Color("#ff4500")
-    orchid               = Color("#da70d6")
-    palegoldenrod        = Color("#eee8aa")
-    palegreen            = Color("#98fb98")
-    paleturquoise        = Color("#afeeee")
-    palevioletred        = Color("#db7093")
-    papayawhip           = Color("#ffefd5")
-    peachpuff            = Color("#ffdab9")
-    peru                 = Color("#cd853f")
-    pink                 = Color("#ffc0cb")
-    plum                 = Color("#dda0dd")
-    powderblue           = Color("#b0e0e6")
-    purple               = Color("#800080")
-    rebeccapurple        = Color("#663399")
-    red                  = Color("#ff0000")
-    rosybrown            = Color("#bc8f8f")
-    royalblue            = Color("#4169e1")
-    saddlebrown          = Color("#8b4513")
-    salmon               = Color("#fa8072")
-    sandybrown           = Color("#f4a460")
-    seagreen             = Color("#2e8b57")
-    seashell             = Color("#fff5ee")
-    sienna               = Color("#a0522d")
-    silver               = Color("#c0c0c0")
-    skyblue              = Color("#87ceeb")
-    slateblue            = Color("#6a5acd")
-    slategray            = Color("#708090")
-    slategrey            = Color("#708090")
-    snow                 = Color("#fffafa")
-    springgreen          = Color("#00ff7f")
-    steelblue            = Color("#4682b4")
-    tan                  = Color("#d2b48c")
-    teal                 = Color("#008080")
-    thistle              = Color("#d8bfd8")
-    tomato               = Color("#ff6347")
-    transparent          = Color("#00000000")  # not standard but exists in QML
-    turquoise            = Color("#40e0d0")
-    violet               = Color("#ee82ee")
-    wheat                = Color("#f5deb3")
-    white                = Color("#ffffff")
-    whitesmoke           = Color("#f5f5f5")
-    yellow               = Color("#ffff00")
-    yellowgreen          = Color("#9acd32")
+	aliceblue			= Color("#f0f8ff")
+	antiquewhite		 = Color("#faebd7")
+	aqua				 = Color("#00ffff")
+	aquamarine		   = Color("#7fffd4")
+	azure				= Color("#f0ffff")
+	beige				= Color("#f5f5dc")
+	bisque			   = Color("#ffe4c4")
+	black				= Color("#000000")
+	blanchedalmond	   = Color("#ffebcd")
+	blue				 = Color("#0000ff")
+	blueviolet		   = Color("#8a2be2")
+	brown				= Color("#a52a2a")
+	burlywood			= Color("#deb887")
+	cadetblue			= Color("#5f9ea0")
+	chartreuse		   = Color("#7fff00")
+	chocolate			= Color("#d2691e")
+	coral				= Color("#ff7f50")
+	cornflowerblue	   = Color("#6495ed")
+	cornsilk			 = Color("#fff8dc")
+	crimson			  = Color("#dc143c")
+	cyan				 = Color("#00ffff")
+	darkblue			 = Color("#00008b")
+	darkcyan			 = Color("#008b8b")
+	darkgoldenrod		= Color("#b8860b")
+	darkgray			 = Color("#a9a9a9")
+	darkgreen			= Color("#006400")
+	darkgrey			 = Color("#a9a9a9")
+	darkkhaki			= Color("#bdb76b")
+	darkmagenta		  = Color("#8b008b")
+	darkolivegreen	   = Color("#556b2f")
+	darkorange		   = Color("#ff8c00")
+	darkorchid		   = Color("#9932cc")
+	darkred			  = Color("#8b0000")
+	darksalmon		   = Color("#e9967a")
+	darkseagreen		 = Color("#8fbc8f")
+	darkslateblue		= Color("#483d8b")
+	darkslategray		= Color("#2f4f4f")
+	darkslategrey		= Color("#2f4f4f")
+	darkturquoise		= Color("#00ced1")
+	darkviolet		   = Color("#9400d3")
+	deeppink			 = Color("#ff1493")
+	deepskyblue		  = Color("#00bfff")
+	dimgray			  = Color("#696969")
+	dimgrey			  = Color("#696969")
+	dodgerblue		   = Color("#1e90ff")
+	firebrick			= Color("#b22222")
+	floralwhite		  = Color("#fffaf0")
+	forestgreen		  = Color("#228b22")
+	fuchsia			  = Color("#ff00ff")
+	gainsboro			= Color("#dcdcdc")
+	ghostwhite		   = Color("#f8f8ff")
+	gold				 = Color("#ffd700")
+	goldenrod			= Color("#daa520")
+	gray				 = Color("#808080")
+	green				= Color("#008000")
+	greenyellow		  = Color("#adff2f")
+	grey				 = Color("#808080")
+	honeydew			 = Color("#f0fff0")
+	hotpink			  = Color("#ff69b4")
+	indianred			= Color("#cd5c5c")
+	indigo			   = Color("#4b0082")
+	ivory				= Color("#fffff0")
+	khaki				= Color("#f0e68c")
+	lavender			 = Color("#e6e6fa")
+	lavenderblush		= Color("#fff0f5")
+	lawngreen			= Color("#7cfc00")
+	lemonchiffon		 = Color("#fffacd")
+	lightblue			= Color("#add8e6")
+	lightcoral		   = Color("#f08080")
+	lightcyan			= Color("#e0ffff")
+	lightgoldenrodyellow = Color("#fafad2")
+	lightgray			= Color("#d3d3d3")
+	lightgreen		   = Color("#90ee90")
+	lightgrey			= Color("#d3d3d3")
+	lightpink			= Color("#ffb6c1")
+	lightsalmon		  = Color("#ffa07a")
+	lightseagreen		= Color("#20b2aa")
+	lightskyblue		 = Color("#87cefa")
+	lightslategray	   = Color("#778899")
+	lightslategrey	   = Color("#778899")
+	lightsteelblue	   = Color("#b0c4de")
+	lightyellow		  = Color("#ffffe0")
+	lime				 = Color("#00ff00")
+	limegreen			= Color("#32cd32")
+	linen				= Color("#faf0e6")
+	magenta			  = Color("#ff00ff")
+	maroon			   = Color("#800000")
+	mediumaquamarine	 = Color("#66cdaa")
+	mediumblue		   = Color("#0000cd")
+	mediumorchid		 = Color("#ba55d3")
+	mediumpurple		 = Color("#9370db")
+	mediumseagreen	   = Color("#3cb371")
+	mediumslateblue	  = Color("#7b68ee")
+	mediumspringgreen	= Color("#00fa9a")
+	mediumturquoise	  = Color("#48d1cc")
+	mediumvioletred	  = Color("#c71585")
+	midnightblue		 = Color("#191970")
+	mintcream			= Color("#f5fffa")
+	mistyrose			= Color("#ffe4e1")
+	moccasin			 = Color("#ffe4b5")
+	navajowhite		  = Color("#ffdead")
+	navy				 = Color("#000080")
+	oldlace			  = Color("#fdf5e6")
+	olive				= Color("#808000")
+	olivedrab			= Color("#6b8e23")
+	orange			   = Color("#ffa500")
+	orangered			= Color("#ff4500")
+	orchid			   = Color("#da70d6")
+	palegoldenrod		= Color("#eee8aa")
+	palegreen			= Color("#98fb98")
+	paleturquoise		= Color("#afeeee")
+	palevioletred		= Color("#db7093")
+	papayawhip		   = Color("#ffefd5")
+	peachpuff			= Color("#ffdab9")
+	peru				 = Color("#cd853f")
+	pink				 = Color("#ffc0cb")
+	plum				 = Color("#dda0dd")
+	powderblue		   = Color("#b0e0e6")
+	purple			   = Color("#800080")
+	rebeccapurple		= Color("#663399")
+	red				  = Color("#ff0000")
+	rosybrown			= Color("#bc8f8f")
+	royalblue			= Color("#4169e1")
+	saddlebrown		  = Color("#8b4513")
+	salmon			   = Color("#fa8072")
+	sandybrown		   = Color("#f4a460")
+	seagreen			 = Color("#2e8b57")
+	seashell			 = Color("#fff5ee")
+	sienna			   = Color("#a0522d")
+	silver			   = Color("#c0c0c0")
+	skyblue			  = Color("#87ceeb")
+	slateblue			= Color("#6a5acd")
+	slategray			= Color("#708090")
+	slategrey			= Color("#708090")
+	snow				 = Color("#fffafa")
+	springgreen		  = Color("#00ff7f")
+	steelblue			= Color("#4682b4")
+	tan				  = Color("#d2b48c")
+	teal				 = Color("#008080")
+	thistle			  = Color("#d8bfd8")
+	tomato			   = Color("#ff6347")
+	transparent		  = Color("#00000000")  # not standard but exists in QML
+	turquoise			= Color("#40e0d0")
+	violet			   = Color("#ee82ee")
+	wheat				= Color("#f5deb3")
+	white				= Color("#ffffff")
+	whitesmoke		   = Color("#f5f5f5")
+	yellow			   = Color("#ffff00")
+	yellowgreen		  = Color("#9acd32")
 
 
 def hsluva(
-    hue: float = 0, saturation: float = 0, luv: float = 0, alpha: float = 1,
+	hue: float = 0, saturation: float = 0, luv: float = 0, alpha: float = 1,
 ) -> Color:
-    """Return a `Color` from `(0-359, 0-100, 0-100, 0-1)` HSLuv arguments."""
-    return Color().but(hue, saturation, luv, alpha)
+	"""Return a `Color` from `(0-359, 0-100, 0-100, 0-1)` HSLuv arguments."""
+	return Color().but(hue, saturation, luv, alpha)
 
 
 def hsla(
-    hue: float = 0, saturation: float = 0, light: float = 0, alpha: float = 1,
+	hue: float = 0, saturation: float = 0, light: float = 0, alpha: float = 1,
 ) -> Color:
-    """Return a `Color` from `(0-359, 0-100, 0-100, 0-1)` HSL arguments."""
-    return Color().but(hue, saturation, light=light, alpha=alpha)
+	"""Return a `Color` from `(0-359, 0-100, 0-100, 0-1)` HSL arguments."""
+	return Color().but(hue, saturation, light=light, alpha=alpha)
 
 
 def rgba(
-    red: float = 0, green: float = 0, blue: float = 0, alpha: float = 1,
+	red: float = 0, green: float = 0, blue: float = 0, alpha: float = 1,
 ) -> Color:
-    """Return a `Color` from `(0-255, 0-255, 0-255, 0-1)` RGB arguments."""
-    return Color().but(red=red, green=green, blue=blue, alpha=alpha)
+	"""Return a `Color` from `(0-255, 0-255, 0-255, 0-1)` RGB arguments."""
+	return Color().but(red=red, green=green, blue=blue, alpha=alpha)
 
 
 # Aliases

src/backend/errors.py

@@ -12,117 +12,117 @@ import nio
 
 @dataclass
 class MatrixError(Exception):
-    """An error returned by a Matrix server."""
+	"""An error returned by a Matrix server."""
 
-    http_code: int           = 400
-    m_code:    Optional[str] = None
-    message:   Optional[str] = None
-    content:   str           = ""
+	http_code: int		   = 400
+	m_code:	Optional[str] = None
+	message:   Optional[str] = None
+	content:   str		   = ""
 
-    @classmethod
-    async def from_nio(cls, response: nio.ErrorResponse) -> "MatrixError":
-        """Return a `MatrixError` subclass from a nio `ErrorResponse`."""
+	@classmethod
+	async def from_nio(cls, response: nio.ErrorResponse) -> "MatrixError":
+		"""Return a `MatrixError` subclass from a nio `ErrorResponse`."""
 
-        http_code = response.transport_response.status
-        m_code    = response.status_code
-        message   = response.message
-        content   = await response.transport_response.text()
+		http_code = response.transport_response.status
+		m_code	= response.status_code
+		message   = response.message
+		content   = await response.transport_response.text()
 
-        for subcls in cls.__subclasses__():
-            if subcls.m_code and subcls.m_code == m_code:
-                return subcls(http_code, m_code, message, content)
+		for subcls in cls.__subclasses__():
+			if subcls.m_code and subcls.m_code == m_code:
+				return subcls(http_code, m_code, message, content)
 
-        # If error doesn't have a M_CODE, look for a generic http error class
-        for subcls in cls.__subclasses__():
-            if not subcls.m_code and subcls.http_code == http_code:
-                return subcls(http_code, m_code, message, content)
+		# If error doesn't have a M_CODE, look for a generic http error class
+		for subcls in cls.__subclasses__():
+			if not subcls.m_code and subcls.http_code == http_code:
+				return subcls(http_code, m_code, message, content)
 
-        return cls(http_code, m_code, message, content)
+		return cls(http_code, m_code, message, content)
 
 
 @dataclass
 class MatrixUnrecognized(MatrixError):
-    http_code: int = 400
-    m_code:    str = "M_UNRECOGNIZED"
+	http_code: int = 400
+	m_code:	str = "M_UNRECOGNIZED"
 
 
 @dataclass
 class MatrixInvalidAccessToken(MatrixError):
-    http_code: int = 401
-    m_code:    str = "M_UNKNOWN_TOKEN"
+	http_code: int = 401
+	m_code:	str = "M_UNKNOWN_TOKEN"
 
 
 @dataclass
 class MatrixUnauthorized(MatrixError):
-    http_code: int = 401
-    m_code:    str = "M_UNAUTHORIZED"
+	http_code: int = 401
+	m_code:	str = "M_UNAUTHORIZED"
 
 
 @dataclass
 class MatrixForbidden(MatrixError):
-    http_code: int = 403
-    m_code:    str = "M_FORBIDDEN"
+	http_code: int = 403
+	m_code:	str = "M_FORBIDDEN"
 
 
 @dataclass
 class MatrixBadJson(MatrixError):
-    http_code: int = 403
-    m_code:    str = "M_BAD_JSON"
+	http_code: int = 403
+	m_code:	str = "M_BAD_JSON"
 
 
 @dataclass
 class MatrixNotJson(MatrixError):
-    http_code: int = 403
-    m_code:    str = "M_NOT_JSON"
+	http_code: int = 403
+	m_code:	str = "M_NOT_JSON"
 
 
 @dataclass
 class MatrixUserDeactivated(MatrixError):
-    http_code: int = 403
-    m_code:    str = "M_USER_DEACTIVATED"
+	http_code: int = 403
+	m_code:	str = "M_USER_DEACTIVATED"
 
 
 @dataclass
 class MatrixNotFound(MatrixError):
-    http_code: int = 404
-    m_code:    str = "M_NOT_FOUND"
+	http_code: int = 404
+	m_code:	str = "M_NOT_FOUND"
 
 
 @dataclass
 class MatrixTooLarge(MatrixError):
-    http_code: int = 413
-    m_code:    str = "M_TOO_LARGE"
+	http_code: int = 413
+	m_code:	str = "M_TOO_LARGE"
 
 
 @dataclass
 class MatrixBadGateway(MatrixError):
-    http_code: int           = 502
-    m_code:    Optional[str] = None
+	http_code: int		   = 502
+	m_code:	Optional[str] = None
 
 
 # Client errors
 
 @dataclass
 class InvalidUserId(Exception):
-    user_id: str = field()
+	user_id: str = field()
 
 
 @dataclass
 class InvalidUserInContext(Exception):
-    user_id: str = field()
+	user_id: str = field()
 
 
 @dataclass
 class UserFromOtherServerDisallowed(Exception):
-    user_id: str = field()
+	user_id: str = field()
 
 
 @dataclass
 class UneededThumbnail(Exception):
-    pass
+	pass
 
 
 @dataclass
 class BadMimeType(Exception):
-    wanted: str = field()
-    got:    str = field()
+	wanted: str = field()
+	got:	str = field()

src/backend/html_markdown.py

@@ -10,6 +10,7 @@ from urllib.parse import unquote
 
 import html_sanitizer.sanitizer as sanitizer
 import lxml.html  # nosec
+import emoji
 import mistune
 import nio
 from html_sanitizer.sanitizer import Sanitizer
@@ -19,503 +20,541 @@ from .color import SVGColor
 
 
 def parse_colour(inline, m, state):
-    colour = m.group(1)
-    text = m.group(2)
-    return "colour", colour, text
+	colour = m.group(1)
+	text = m.group(2)
+	return "colour", colour, text
 
 
 def render_html_colour(colour, text):
-    return f'<span data-mx-color="{colour}">{text}</span>'
+	return f'<span data-mx-color="{colour}">{text}</span>'
 
 
 def plugin_matrix(md):
-    # test string: r"<b>(x) <r>(x) \<a>b>(x) <a\>b>(x) <b>(\(z) <c>(foo\)xyz)"
-    colour = (
-        r"^<(.+?)>"          # capture the colour in `<colour>`
-        r"\((.+?)"           # capture text in `(text`
-        r"(?<!\\)(?:\\\\)*"  # ignore the next `)` if it's \escaped
-        r"\)"                # finish on a `)`
-    )
+	# test string: r"<b>(x) <r>(x) \<a>b>(x) <a\>b>(x) <b>(\(z) <c>(foo\)xyz)"
+	colour = (
+		r"^<(.+?)>"		  # capture the colour in `<colour>`
+		r"\((.+?)"		   # capture text in `(text`
+		r"(?<!\\)(?:\\\\)*"  # ignore the next `)` if it's \escaped
+		r"\)"				# finish on a `)`
+	)
 
-    # Mark colour as high priority as otherwise e.g. <red>(hi) matches the
-    # inline_html rule instead of the colour rule.
-    md.inline.rules.insert(1, "colour")
-    md.inline.register_rule("colour", colour, parse_colour)
+	# Mark colour as high priority as otherwise e.g. <red>(hi) matches the
+	# inline_html rule instead of the colour rule.
+	md.inline.rules.insert(1, "colour")
+	if mistune.__version__.startswith("2."):  # v2
+		md.inline.register_rule("colour", colour, parse_colour)
+	else:
+		md.inline.register("colour", colour, parse_colour)
 
-    if md.renderer.NAME == "html":
-        md.renderer.register("colour", render_html_colour)
+	if md.renderer.NAME == "html":
+		md.renderer.register("colour", render_html_colour)
 
 
 class HTMLProcessor:
-    """Provide HTML filtering and conversion from Markdown.
-
-    Filtering sanitizes HTML and ensures it complies both with the Matrix
-    specification:
-    https://matrix.org/docs/spec/client_server/latest#m-room-message-msgtypes
-    and the supported Qt HTML subset for usage in QML:
-    https://doc.qt.io/qt-5/richtext-html-subset.html
-
-    Some methods take an `outgoing` argument, specifying if the HTML is
-    intended to be sent to matrix servers or used locally in our application.
-
-    For local usage, extra transformations are applied:
-
-    - Wrap text lines starting with a `>` in `<span>` with a `quote` class.
-      This allows them to be styled appropriately from QML.
-
-    Some methods take an `inline` argument, which return text appropriate
-    for UI elements restricted to display a single line, e.g. the room
-    last message subtitles in QML or notifications.
-    In inline filtered HTML, block tags are stripped or substituted and
-    newlines are turned into ⏎ symbols (U+23CE).
-    """
-
-    inline_tags = {
-        "span", "font", "a", "sup", "sub", "b", "i", "s", "u", "code",
-        "mx-reply",
-    }
-
-    block_tags = {
-        "h1", "h2", "h3", "h4", "h5", "h6", "blockquote",
-        "p", "ul", "ol", "li", "hr", "br", "img",
-        "table", "thead", "tbody", "tr", "th", "td", "pre",
-        "mx-reply",
-    }
-
-    opaque_id         = r"[a-zA-Z\d._-]+?"
-    user_id_localpart = r"[\x21-\x39\x3B-\x7E]+?"
-
-    user_id_regex = re.compile(
-        rf"(?P<body>@{user_id_localpart}:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
-    )
-    room_id_regex = re.compile(
-        rf"(?P<body>!{opaque_id}:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
-    )
-    room_alias_regex = re.compile(
-        r"(?=^|\W)(?P<body>#\S+?:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
-    )
-
-    link_regexes = [re.compile(r, re.IGNORECASE)
-                    if isinstance(r, str) else r for r in [
-        # Normal :// URLs
-        (r"(?P<body>[a-z\d]+://(?P<host>[a-z\d._-]+(?:\:\d+)?)"
-         r"(?:/[/\-.,\w#%&?:;=~!$*+^@']*)?(?:\([/\-_.,a-z\d#%&?;=~]*\))?)"),
-
-        # mailto: and tel:
-        r"mailto:(?P<body>[a-z0-9._-]+@(?P<host>[a-z0-9.:-]*[a-z\d]))",
-        r"tel:(?P<body>[0-9+-]+)(?P<host>)",
-
-        # magnet:
-        r"(?P<body>magnet:\?xt=urn:[a-z0-9]+:.+)(?P<host>)",
-
-        user_id_regex, room_id_regex, room_alias_regex,
-    ]]
-
-    matrix_to_regex = re.compile(r"^https?://matrix.to/#/", re.IGNORECASE)
-
-    link_is_matrix_to_regex = re.compile(
-        r"https?://matrix.to/#/\S+", re.IGNORECASE,
-    )
-    link_is_user_id_regex = re.compile(
-        r"https?://matrix.to/#/@\S+", re.IGNORECASE,
-    )
-    link_is_room_id_regex = re.compile(
-        r"https?://matrix.to/#/!\S+", re.IGNORECASE,
-    )
-    link_is_room_alias_regex = re.compile(
-        r"https?://matrix.to/#/#\S+", re.IGNORECASE,
-    )
-    link_is_message_id_regex = re.compile(
-        r"https?://matrix.to/#/[!#]\S+/\$\S+", re.IGNORECASE,
-    )
-
-    inline_quote_regex = re.compile(r"(^|⏎|>)(\s*&gt;[^⏎\n]*)", re.MULTILINE)
-
-    quote_regex = re.compile(
-        r"(^|<span/?>|<p/?>|<br/?>|<h\d/?>|<mx-reply/?>)"
-        r"(\s*&gt;.*?)"
-        r"(<span/?>|</?p>|<br/?>|</?h\d>|</mx-reply/?>|$)",
-        re.MULTILINE,
-    )
-
-    extra_newlines_regex = re.compile(r"\n(\n*)")
-
-
-    def __init__(self) -> None:
-        # The whitespace remover doesn't take <pre> into account
-        sanitizer.normalize_overall_whitespace = lambda html, *args, **kw: html
-        sanitizer.normalize_whitespace_in_text_or_tail = \
-            lambda el, *args, **kw: el
-
-        # hard_wrap: convert all \n to <br> without required two spaces
-        # escape: escape HTML characters in the input string, e.g. tags
-        self._markdown_to_html = mistune.create_markdown(
-            hard_wrap = True,
-            escape    = True,
-            renderer  = "html",
-            plugins   = ['strikethrough', plugin_matrix],
-        )
-
-
-    def mentions_in_html(self, html: str) -> List[Tuple[str, str]]:
-        """Return list of (text, href) tuples for all mention links in html."""
-
-        if not html.strip():
-            return []
-
-        return [
-            (a_tag.text, href)
-            for a_tag, _, href, _ in lxml.html.iterlinks(html)
-            if a_tag.text and
-               self.link_is_matrix_to_regex.match(unquote(href.strip()))
-        ]
-
-
-    def from_markdown(
-        self,
-        text:                  str,
-        inline:                bool                     = False,
-        outgoing:              bool                     = False,
-        display_name_mentions: Optional[Dict[str, str]] = None,
-    ) -> str:
-        """Return filtered HTML from Markdown text."""
-
-        return self.filter(
-            self._markdown_to_html(text),
-            inline,
-            outgoing,
-            display_name_mentions,
-        )
-
-
-    def filter(
-        self,
-        html:                  str,
-        inline:                bool                     = False,
-        outgoing:              bool                     = False,
-        display_name_mentions: Optional[Dict[str, str]] = None,
-    ) -> str:
-        """Filter and return HTML."""
-
-        mentions = display_name_mentions
-
-        sanit = Sanitizer(self.sanitize_settings(inline, outgoing, mentions))
-        html  = sanit.sanitize(html).rstrip("\n")
-
-        if not html.strip():
-            return html
-
-        tree = etree.fromstring(
-            html, parser=etree.HTMLParser(encoding="utf-8"),
-        )
-
-        for a_tag in tree.iterdescendants("a"):
-            self._mentions_to_matrix_to_links(a_tag, mentions, outgoing)
-
-            if not outgoing:
-                self._matrix_to_links_add_classes(a_tag)
-
-        html = etree.tostring(tree, encoding="utf-8", method="html").decode()
-        html = sanit.sanitize(html).rstrip("\n")
-
-        if outgoing:
-            return html
-
-        # Client-side modifications
-
-        html = self.quote_regex.sub(r'\1<span class="quote">\2</span>\3', html)
-
-        if not inline:
-            return html
-
-        return self.inline_quote_regex.sub(
-            r'\1<span class="quote">\2</span>', html,
-        )
-
-
-    def sanitize_settings(
-        self,
-        inline:                bool                     = False,
-        outgoing:              bool                     = False,
-        display_name_mentions: Optional[Dict[str, str]] = None,
-    ) -> dict:
-        """Return an html_sanitizer configuration."""
-
-        # https://matrix.org/docs/spec/client_server/latest#m-room-message-msgtypes
-
-        inline_tags = self.inline_tags
-        all_tags    = inline_tags | self.block_tags
-
-        inlines_attributes = {
-            "font": {"color"},
-            "a":    {"href", "class", "data-mention"},
-            "code": {"class"},
-        }
-        attributes = {**inlines_attributes, **{
-            "ol":   {"start"},
-            "hr":   {"width"},
-            "span": {"data-mx-color"},
-            "img":  {
-                "data-mx-emote", "src", "alt", "title", "width", "height",
-            },
-        }}
-
-        username_link_regexes = [re.compile(r) for r in [
-            rf"(?<!\w)(?P<body>{re.escape(name or user_id)})(?!\w)(?P<host>)"
-            for user_id, name in (display_name_mentions or {}).items()
-        ]]
-
-        return {
-            "tags": inline_tags if inline else all_tags,
-            "attributes": inlines_attributes if inline else attributes,
-            "empty": {} if inline else {"hr", "br", "img"},
-            "separate": {"a"} if inline else {
-                "a", "p", "li", "table", "tr", "th", "td", "br", "hr", "img",
-            },
-            "whitespace": {},
-            "keep_typographic_whitespace": True,
-            "add_nofollow": False,
-            "autolink": {
-                "link_regexes":
-                    self.link_regexes + username_link_regexes,  # type: ignore
-                "avoid_hosts": [],
-            },
-            "sanitize_href": lambda href: href,
-            "element_preprocessors": [
-                sanitizer.bold_span_to_strong,
-                sanitizer.italic_span_to_em,
-                sanitizer.tag_replacer("strong", "b"),
-                sanitizer.tag_replacer("em", "i"),
-                sanitizer.tag_replacer("strike", "s"),
-                sanitizer.tag_replacer("del", "s"),
-                sanitizer.tag_replacer("form", "p"),
-                sanitizer.tag_replacer("div", "p"),
-                sanitizer.tag_replacer("caption", "p"),
-                sanitizer.target_blank_noopener,
-
-                self._span_color_to_font if not outgoing else lambda el: el,
-
-                self._img_to_a,
-                self._remove_extra_newlines,
-                self._newlines_to_return_symbol if inline else lambda el: el,
-                self._reply_to_inline if inline else lambda el: el,
-            ],
-            "element_postprocessors": [
-                self._font_color_to_span if outgoing else lambda el: el,
-                self._hr_to_dashes if not outgoing else lambda el: el,
-            ],
-            "is_mergeable": lambda e1, e2: e1.attrib == e2.attrib,
-        }
-
-
-    @staticmethod
-    def _span_color_to_font(el: HtmlElement) -> HtmlElement:
-        """Convert HTML `<span data-mx-color=...` to `<font color=...>`."""
+	"""Provide HTML filtering and conversion from Markdown.
+
+	Filtering sanitizes HTML and ensures it complies both with the Matrix
+	specification:
+	https://matrix.org/docs/spec/client_server/latest#m-room-message-msgtypes
+	and the supported Qt HTML subset for usage in QML:
+	https://doc.qt.io/qt-5/richtext-html-subset.html
+
+	Some methods take an `outgoing` argument, specifying if the HTML is
+	intended to be sent to matrix servers or used locally in our application.
+
+	For local usage, extra transformations are applied:
+
+	- Wrap text lines starting with a `>` in `<span>` with a `quote` class.
+	  This allows them to be styled appropriately from QML.
+
+	Some methods take an `inline` argument, which return text appropriate
+	for UI elements restricted to display a single line, e.g. the room
+	last message subtitles in QML or notifications.
+	In inline filtered HTML, block tags are stripped or substituted and
+	newlines are turned into ⏎ symbols (U+23CE).
+	"""
+
+	inline_tags = {
+		"span", "font", "a", "sup", "sub", "b", "i", "s", "u", "code",
+		"mx-reply",
+	}
+
+	block_tags = {
+		"h1", "h2", "h3", "h4", "h5", "h6", "blockquote",
+		"p", "ul", "ol", "li", "hr", "br", "img",
+		"table", "thead", "tbody", "tr", "th", "td", "pre",
+		"mx-reply",
+	}
+
+	opaque_id		 = r"[a-zA-Z\d._-]+?"
+	user_id_localpart = r"[\x21-\x39\x3B-\x7E]+?"
+
+	user_id_regex = re.compile(
+		rf"(?P<body>@{user_id_localpart}:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
+	)
+	room_id_regex = re.compile(
+		rf"(?P<body>!{opaque_id}:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
+	)
+	room_alias_regex = re.compile(
+		r"(?=^|\W)(?P<body>#\S+?:(?P<host>[a-zA-Z\d.:-]*[a-zA-Z\d]))",
+	)
+
+	link_regexes = [re.compile(r, re.IGNORECASE)
+					if isinstance(r, str) else r for r in [
+		# Normal :// URLs
+		(r"(?P<body>[a-z\d]+://(?P<host>[a-z\d._-]+(?:\:\d+)?)"
+		 r"(?:/[/\-.,\w#%&?:;=~!$*+^@']*)?(?:\([/\-_.,a-z\d#%&?;=~]*\))?)"),
+
+		# mailto: and tel:
+		r"mailto:(?P<body>[a-z0-9._-]+@(?P<host>[a-z0-9.:-]*[a-z\d]))",
+		r"tel:(?P<body>[0-9+-]+)(?P<host>)",
+
+		# magnet:
+		r"(?P<body>magnet:\?xt=urn:[a-z0-9]+:.+)(?P<host>)",
+
+		user_id_regex, room_id_regex, room_alias_regex,
+	]]
+
+	matrix_to_regex = re.compile(r"^https?://matrix.to/#/", re.IGNORECASE)
+
+	link_is_matrix_to_regex = re.compile(
+		r"https?://matrix.to/#/\S+", re.IGNORECASE,
+	)
+	link_is_user_id_regex = re.compile(
+		r"https?://matrix.to/#/@\S+", re.IGNORECASE,
+	)
+	link_is_room_id_regex = re.compile(
+		r"https?://matrix.to/#/!\S+", re.IGNORECASE,
+	)
+	link_is_room_alias_regex = re.compile(
+		r"https?://matrix.to/#/#\S+", re.IGNORECASE,
+	)
+	link_is_message_id_regex = re.compile(
+		r"https?://matrix.to/#/[!#]\S+/\$\S+", re.IGNORECASE,
+	)
+
+	inline_quote_regex = re.compile(r"(^|⏎|>)(\s*&gt;[^⏎\n]*)", re.MULTILINE)
+
+	quote_regex = re.compile(
+		r"(^|<span/?>|<p/?>|<br/?>|<h\d/?>|<mx-reply/?>)"
+		r"(\s*&gt;.*?)"
+		r"(<span/?>|</?p>|<br/?>|</?h\d>|</mx-reply/?>|$)",
+		re.MULTILINE,
+	)
+
+	extra_newlines_regex = re.compile(r"\n(\n*)")
+
+
+	def __init__(self) -> None:
+		# The whitespace remover doesn't take <pre> into account
+		sanitizer.normalize_overall_whitespace = lambda html, *args, **kw: html
+		sanitizer.normalize_whitespace_in_text_or_tail = \
+			lambda el, *args, **kw: el
+
+		# hard_wrap: convert all \n to <br> without required two spaces
+		# escape: escape HTML characters in the input string, e.g. tags
+		self._markdown_to_html = mistune.create_markdown(
+			hard_wrap = True,
+			escape	= True,
+			renderer  = "html",
+			plugins   = ['strikethrough', plugin_matrix],
+		)
+
+
+	def mentions_in_html(self, html: str) -> List[Tuple[str, str]]:
+		"""Return list of (text, href) tuples for all mention links in html."""
+
+		if not html.strip():
+			return []
+
+		return [
+			(a_tag.text, href)
+			for a_tag, _, href, _ in lxml.html.iterlinks(html)
+			if a_tag.text and
+			   self.link_is_matrix_to_regex.match(unquote(href.strip()))
+		]
+
+
+	def from_markdown(
+		self,
+		text:				  str,
+		inline:				bool					 = False,
+		outgoing:			  bool					 = False,
+		display_name_mentions: Optional[Dict[str, str]] = None,
+	) -> str:
+		"""Return filtered HTML from Markdown text."""
+
+		return self.filter(
+			self._markdown_to_html(text),
+			inline,
+			outgoing,
+			display_name_mentions,
+		)
+
+
+	def filter(
+		self,
+		html:				  str,
+		inline:				bool					 = False,
+		outgoing:			  bool					 = False,
+		display_name_mentions: Optional[Dict[str, str]] = None,
+	) -> str:
+		"""Filter and return HTML."""
+
+		mentions = display_name_mentions
+
+		sanit = Sanitizer(self.sanitize_settings(inline, outgoing, mentions))
+		html  = sanit.sanitize(html).rstrip("\n")
+
+		if not html.strip():
+			return html
+
+		tree = etree.fromstring(
+			html, parser=etree.HTMLParser(encoding="utf-8"),
+		)
+
+		for a_tag in tree.iterdescendants("a"):
+			self._mentions_to_matrix_to_links(a_tag, mentions, outgoing)
+
+			if not outgoing:
+				self._matrix_to_links_add_classes(a_tag)
+
+		for node in tree.iterdescendants():
+			if node.tag != "code" and node.text:
+				node.text = emoji.emojize(
+					node.text, language="alias", variant="emoji_type")
+			if node.getparent() and node.getparent().tag != "code" and node.tail:
+				node.tail = emoji.emojize(
+					node.tail, language="alias", variant="emoji_type")
+
+		html = etree.tostring(tree, encoding="utf-8", method="html").decode()
+		html = sanit.sanitize(html).rstrip("\n")
+
+		if outgoing:
+			return html
+
+		# Client-side modifications
+
+		# re-parsing, will sanitize again but allowing style
+		tree = etree.fromstring(
+			html, parser=etree.HTMLParser(encoding="utf-8"),
+		)
+
+		for span_tag in tree.iterfind(".//span[@data-mx-spoiler]"):
+			# if there are sub-elements, their styles also need to be set or
+			# background-color doesn't seem to apply
+			for tag in span_tag.iter():
+				tag.set(
+					"style",
+					"color: black !important; background-color: black !important;"
+					+ (tag.get("style") or "")
+				)
+
+		html = etree.tostring(tree, encoding="utf-8", method="html").decode()
+
+		html = Sanitizer(self.sanitize_settings(
+			inline, outgoing, mentions, extra_attributes={"style"}
+		)).sanitize(html).rstrip("\n")
+
+		html = self.quote_regex.sub(r'\1<span class="quote">\2</span>\3', html)
+
+		if not inline:
+			return html
+
+		return self.inline_quote_regex.sub(
+			r'\1<span class="quote">\2</span>', html,
+		)
+
+
+	def sanitize_settings(
+		self,
+		inline:				bool					 = False,
+		outgoing:			  bool					 = False,
+		display_name_mentions: Optional[Dict[str, str]] = None,
+		extra_attributes:	  set					  = set(),
+	) -> dict:
+		"""Return an html_sanitizer configuration."""
+
+		# https://matrix.org/docs/spec/client_server/latest#m-room-message-msgtypes
+
+		inline_tags = self.inline_tags
+		all_tags	= inline_tags | self.block_tags
+
+		inlines_attributes = {
+			"font": {"color"},
+			"a":	{"href", "class", "data-mention"},
+			"code": {"class"},
+			"span": {"data-mx-spoiler", "data-mx-color"},
+		}
+		attributes = {**inlines_attributes, **{
+			"ol":   {"start"},
+			"hr":   {"width"},
+			"img":  {
+				"data-mx-emote", "src", "alt", "title", "width", "height",
+			},
+		}}
+
+		for key in inlines_attributes:
+			inlines_attributes[key] |= extra_attributes
+		for key in attributes:
+			attributes[key] |= extra_attributes
+
+		username_link_regexes = [re.compile(r) for r in [
+			rf"(?<!\w)(?P<body>{re.escape(name or user_id)})(?!\w)(?P<host>)"
+			for user_id, name in (display_name_mentions or {}).items()
+		]]
+
+		return {
+			"tags": inline_tags if inline else all_tags,
+			"attributes": inlines_attributes if inline else attributes,
+			"empty": set() if inline else {"hr", "br", "img"},
+			"separate": {"a"} if inline else {
+				"a", "p", "li", "table", "tr", "th", "td", "br", "hr", "img",
+			},
+			"whitespace": set(),
+			"keep_typographic_whitespace": True,
+			"add_nofollow": False,
+			"autolink": {
+				"link_regexes":
+					self.link_regexes + username_link_regexes,  # type: ignore
+				"avoid_hosts": [],
+			},
+			"sanitize_href": lambda href: href,
+			"element_preprocessors": [
+				sanitizer.bold_span_to_strong,
+				sanitizer.italic_span_to_em,
+				sanitizer.tag_replacer("strong", "b"),
+				sanitizer.tag_replacer("em", "i"),
+				sanitizer.tag_replacer("strike", "s"),
+				sanitizer.tag_replacer("del", "s"),
+				sanitizer.tag_replacer("form", "p"),
+				sanitizer.tag_replacer("div", "p"),
+				sanitizer.tag_replacer("caption", "p"),
+				sanitizer.target_blank_noopener,
+
+				self._span_color_to_font if not outgoing else lambda el: el,
+
+				self._img_to_a,
+				self._remove_extra_newlines,
+				self._newlines_to_return_symbol if inline else lambda el: el,
+				self._reply_to_inline if inline else lambda el: el,
+			],
+			"element_postprocessors": [
+				self._font_color_to_span if outgoing else lambda el: el,
+				self._hr_to_dashes if not outgoing else lambda el: el,
+			],
+			"is_mergeable": lambda e1, e2: e1.attrib == e2.attrib,
+		}
+
+
+	@staticmethod
+	def _span_color_to_font(el: HtmlElement) -> HtmlElement:
+		"""Convert HTML `<span data-mx-color=...` to `<font color=...>`."""
+
+		if el.tag not in ("span", "font"):
+			return el
+
+		color = el.attrib.pop("data-mx-color", None)
+		if color:
+			el.tag = "font"
+			el.attrib["color"] = color
+
+		return el
+
+
+	@staticmethod
+	def _font_color_to_span(el: HtmlElement) -> HtmlElement:
+		"""Convert HTML `<font color=...>` to `<span data-mx-color=...`."""
+
+		if el.tag not in ("span", "font"):
+			return el
+
+		color = el.attrib.pop("color", None)
+		if color:
+			el.tag = "span"
+			el.attrib["data-mx-color"] = color
+
+		return el
+
+
+	@staticmethod
+	def _img_to_a(el: HtmlElement) -> HtmlElement:
+		"""Linkify images by wrapping `<img>` tags in `<a>`."""
+
+		if el.tag != "img":
+			return el
+
+		src	  = el.attrib.get("src", "")
+		width	= el.attrib.get("width")
+		height   = el.attrib.get("height")
+		is_emote = "data-mx-emote" in el.attrib
+
+		if src.startswith("mxc://"):
+			el.attrib["src"] = nio.Api.mxc_to_http(src)
 
-        if el.tag not in ("span", "font"):
-            return el
+		if is_emote and not width and not height:
+			el.attrib["width"]  = 32
+			el.attrib["height"] = 32
 
-        color = el.attrib.pop("data-mx-color", None)
-        if color:
-            el.tag = "font"
-            el.attrib["color"] = color
+		elif is_emote and width and not height:
+			el.attrib["height"] = width
 
-        return el
+		elif is_emote and height and not width:
+			el.attrib["width"] = height
 
+		elif not is_emote and (not width or not height):
+			el.tag			= "a"
+			el.attrib["href"] = el.attrib.pop("src", "")
+			el.text		   = el.attrib.pop("alt", None) or el.attrib["href"]
 
-    @staticmethod
-    def _font_color_to_span(el: HtmlElement) -> HtmlElement:
-        """Convert HTML `<font color=...>` to `<span data-mx-color=...`."""
+		return el
 
-        if el.tag not in ("span", "font"):
-            return el
-
-        color = el.attrib.pop("color", None)
-        if color:
-            el.tag = "span"
-            el.attrib["data-mx-color"] = color
-
-        return el
-
-
-    @staticmethod
-    def _img_to_a(el: HtmlElement) -> HtmlElement:
-        """Linkify images by wrapping `<img>` tags in `<a>`."""
-
-        if el.tag != "img":
-            return el
-
-        src      = el.attrib.get("src", "")
-        width    = el.attrib.get("width")
-        height   = el.attrib.get("height")
-        is_emote = "data-mx-emote" in el.attrib
-
-        if src.startswith("mxc://"):
-            el.attrib["src"] = nio.Api.mxc_to_http(src)
-
-        if is_emote and not width and not height:
-            el.attrib["width"]  = 32
-            el.attrib["height"] = 32
 
-        elif is_emote and width and not height:
-            el.attrib["height"] = width
+	def _remove_extra_newlines(self, el: HtmlElement) -> HtmlElement:
+		r"""Remove excess `\n` characters from HTML elements.
 
-        elif is_emote and height and not width:
-            el.attrib["width"] = height
+		This is done to avoid additional blank lines when the CSS directive
+		`white-space: pre` is used.
 
-        elif not is_emote and (not width or not height):
-            el.tag            = "a"
-            el.attrib["href"] = el.attrib.pop("src", "")
-            el.text           = el.attrib.pop("alt", None) or el.attrib["href"]
+		Text inside `<pre>` tags is ignored, except for the final newlines.
+		"""
 
-        return el
+		pre_parent = any(parent.tag == "pre" for parent in el.iterancestors())
 
+		if el.tag != "pre" and not pre_parent:
+			if el.text:
+				el.text = self.extra_newlines_regex.sub(r"\1", el.text)
+			if el.tail:
+				el.tail = self.extra_newlines_regex.sub(r"\1", el.tail)
+		else:
+			if el.text and el.text.endswith("\n"):
+				el.text = el.text[:-1]
+			if el.tail and el.tail.endswith("\n"):
+				el.tail = el.tail[:-1]
 
-    def _remove_extra_newlines(self, el: HtmlElement) -> HtmlElement:
-        r"""Remove excess `\n` characters from HTML elements.
+		return el
 
-        This is done to avoid additional blank lines when the CSS directive
-        `white-space: pre` is used.
 
-        Text inside `<pre>` tags is ignored, except for the final newlines.
-        """
+	def _newlines_to_return_symbol(self, el: HtmlElement) -> HtmlElement:
+		"""Turn newlines into unicode return symbols (⏎, U+23CE).
 
-        pre_parent = any(parent.tag == "pre" for parent in el.iterancestors())
+		The symbol is added to blocks with siblings (e.g. a `<p>` followed by
+		another `<p>`) and `<br>` tags.
+		The `<br>` themselves will be removed by the inline sanitizer.
+		"""
 
-        if el.tag != "pre" and not pre_parent:
-            if el.text:
-                el.text = self.extra_newlines_regex.sub(r"\1", el.text)
-            if el.tail:
-                el.tail = self.extra_newlines_regex.sub(r"\1", el.tail)
-        else:
-            if el.text and el.text.endswith("\n"):
-                el.text = el.text[:-1]
-            if el.tail and el.tail.endswith("\n"):
-                el.tail = el.tail[:-1]
+		is_block_with_siblings = (el.tag in self.block_tags and
+								  next(el.itersiblings(), None) is not None)
 
-        return el
+		if el.tag == "br" or is_block_with_siblings:
+			el.tail = f" ⏎ {el.tail or ''}"
 
 
-    def _newlines_to_return_symbol(self, el: HtmlElement) -> HtmlElement:
-        """Turn newlines into unicode return symbols (⏎, U+23CE).
+		# Replace left \n in text/tail of <pre> content by the return symbol.
+		if el.text:
+			el.text = re.sub(r"\n", r" ⏎ ", el.text)
 
-        The symbol is added to blocks with siblings (e.g. a `<p>` followed by
-        another `<p>`) and `<br>` tags.
-        The `<br>` themselves will be removed by the inline sanitizer.
-        """
+		if el.tail:
+			el.tail = re.sub(r"\n", r" ⏎ ", el.tail)
 
-        is_block_with_siblings = (el.tag in self.block_tags and
-                                  next(el.itersiblings(), None) is not None)
+		return el
 
-        if el.tag == "br" or is_block_with_siblings:
-            el.tail = f" ⏎ {el.tail or ''}"
 
+	def _reply_to_inline(self, el: HtmlElement) -> HtmlElement:
+		"""Shorten <mx-reply> to only include the replied to event's sender."""
 
-        # Replace left \n in text/tail of <pre> content by the return symbol.
-        if el.text:
-            el.text = re.sub(r"\n", r" ⏎ ", el.text)
+		if el.tag != "mx-reply":
+			return el
 
-        if el.tail:
-            el.tail = re.sub(r"\n", r" ⏎ ", el.tail)
+		try:
+			user_id = el.find("blockquote").findall("a")[1].text
+			text	= f"↩ {user_id[1: ].split(':')[0]}: "  # U+21A9 arrow
+			tail	= el.tail.rstrip().rstrip("⏎")
+		except (AttributeError, IndexError):
+			return el
 
-        return el
+		el.clear()
+		el.text = text
+		el.tail = tail
+		return el
 
 
-    def _reply_to_inline(self, el: HtmlElement) -> HtmlElement:
-        """Shorten <mx-reply> to only include the replied to event's sender."""
+	def _mentions_to_matrix_to_links(
+		self,
+		el:					HtmlElement,
+		display_name_mentions: Optional[Dict[str, str]] = None,
+		outgoing:			  bool					 = False,
+	) -> HtmlElement:
+		"""Turn user ID, usernames and room ID/aliases into matrix.to URL.
 
-        if el.tag != "mx-reply":
-            return el
+		After the HTML sanitizer autolinks these, the links's hrefs are the
+		link text, e.g. `<a href="@foo:bar.com">@foo:bar.com</a>`.
+		We turn them into proper matrix.to URL in this function.
+		"""
 
-        try:
-            user_id = el.find("blockquote").findall("a")[1].text
-            text    = f"↩ {user_id[1: ].split(':')[0]}: "  # U+21A9 arrow
-            tail    = el.tail.rstrip().rstrip("⏎")
-        except (AttributeError, IndexError):
-            return el
+		if el.tag != "a" or not el.attrib.get("href"):
+			return el
 
-        el.clear()
-        el.text = text
-        el.tail = tail
-        return el
+		id_regexes = (
+			self.user_id_regex, self.room_id_regex, self.room_alias_regex,
+		)
 
+		for regex in id_regexes:
+			if regex.match(unquote(el.attrib["href"])):
+				el.attrib["href"] = f"https://matrix.to/#/{el.attrib['href']}"
+				return el
 
-    def _mentions_to_matrix_to_links(
-        self,
-        el:                    HtmlElement,
-        display_name_mentions: Optional[Dict[str, str]] = None,
-        outgoing:              bool                     = False,
-    ) -> HtmlElement:
-        """Turn user ID, usernames and room ID/aliases into matrix.to URL.
+		for user_id, name in (display_name_mentions or {}).items():
+			if unquote(el.attrib["href"]) == (name or user_id):
+				el.attrib["href"] = f"https://matrix.to/#/{user_id}"
+				return el
 
-        After the HTML sanitizer autolinks these, the links's hrefs are the
-        link text, e.g. `<a href="@foo:bar.com">@foo:bar.com</a>`.
-        We turn them into proper matrix.to URL in this function.
-        """
+		return el
 
-        if el.tag != "a" or not el.attrib.get("href"):
-            return el
 
-        id_regexes = (
-            self.user_id_regex, self.room_id_regex, self.room_alias_regex,
-        )
+	def _matrix_to_links_add_classes(self, el: HtmlElement) -> HtmlElement:
+		"""Add special CSS classes to matrix.to mention links."""
 
-        for regex in id_regexes:
-            if regex.match(unquote(el.attrib["href"])):
-                el.attrib["href"] = f"https://matrix.to/#/{el.attrib['href']}"
-                return el
+		href = unquote(el.attrib.get("href", ""))
 
-        for user_id, name in (display_name_mentions or {}).items():
-            if unquote(el.attrib["href"]) == (name or user_id):
-                el.attrib["href"] = f"https://matrix.to/#/{user_id}"
-                return el
+		if not href or not el.text:
+			return el
 
-        return el
 
+		el.text = self.matrix_to_regex.sub("", el.text or "")
 
-    def _matrix_to_links_add_classes(self, el: HtmlElement) -> HtmlElement:
-        """Add special CSS classes to matrix.to mention links."""
+		# This must be first, or link will be mistaken by room ID/alias regex
+		if self.link_is_message_id_regex.match(href):
+			el.attrib["class"]		= "mention message-id-mention"
+			el.attrib["data-mention"] = el.text.strip()
 
-        href = unquote(el.attrib.get("href", ""))
+		elif self.link_is_user_id_regex.match(href):
+			if el.text.strip().startswith("@"):
+				el.attrib["class"] = "mention user-id-mention"
+			else:
+				el.attrib["class"] = "mention username-mention"
 
-        if not href or not el.text:
-            return el
+			el.attrib["data-mention"] = el.text.strip()
 
+		elif self.link_is_room_id_regex.match(href):
+			el.attrib["class"]		= "mention room-id-mention"
+			el.attrib["data-mention"] = el.text.strip()
 
-        el.text = self.matrix_to_regex.sub("", el.text or "")
+		elif self.link_is_room_alias_regex.match(href):
+			el.attrib["class"]		= "mention room-alias-mention"
+			el.attrib["data-mention"] = el.text.strip()
 
-        # This must be first, or link will be mistaken by room ID/alias regex
-        if self.link_is_message_id_regex.match(href):
-            el.attrib["class"]        = "mention message-id-mention"
-            el.attrib["data-mention"] = el.text.strip()
+		return el
 
-        elif self.link_is_user_id_regex.match(href):
-            if el.text.strip().startswith("@"):
-                el.attrib["class"] = "mention user-id-mention"
-            else:
-                el.attrib["class"] = "mention username-mention"
 
-            el.attrib["data-mention"] = el.text.strip()
+	def _hr_to_dashes(self, el: HtmlElement) -> HtmlElement:
+		if el.tag != "hr":
+			return el
 
-        elif self.link_is_room_id_regex.match(href):
-            el.attrib["class"]        = "mention room-id-mention"
-            el.attrib["data-mention"] = el.text.strip()
-
-        elif self.link_is_room_alias_regex.match(href):
-            el.attrib["class"]        = "mention room-alias-mention"
-            el.attrib["data-mention"] = el.text.strip()
-
-        return el
-
-
-    def _hr_to_dashes(self, el: HtmlElement) -> HtmlElement:
-        if el.tag != "hr":
-            return el
-
-        el.tag             = "p"
-        el.attrib["class"] = "ruler"
-        el.text            = "─" * 19
-        return el
+		el.tag			 = "p"
+		el.attrib["class"] = "ruler"
+		el.text			= "─" * 19
+		return el
 
 
 HTML_PROCESSOR = HTMLProcessor()

src/backend/media_cache.py

@@ -24,354 +24,354 @@ from .models.model import Model
 from .utils import Size, atomic_write, current_task
 
 if TYPE_CHECKING:
-    from .backend import Backend
+	from .backend import Backend
 
 if sys.version_info < (3, 8):
-    import pyfastcopy  # noqa
+	import pyfastcopy  # noqa
 
-CONCURRENT_DOWNLOADS_LIMIT                   = asyncio.BoundedSemaphore(8)
+CONCURRENT_DOWNLOADS_LIMIT				   = asyncio.BoundedSemaphore(8)
 ACCESS_LOCKS: DefaultDict[str, asyncio.Lock] = DefaultDict(asyncio.Lock)
 
 
 @dataclass
 class MediaCache:
-    """Matrix downloaded media cache."""
+	"""Matrix downloaded media cache."""
 
-    backend:  "Backend" = field()
-    base_dir: Path      = field()
+	backend:  "Backend" = field()
+	base_dir: Path	  = field()
 
 
-    def __post_init__(self) -> None:
-        self.thumbs_dir    = self.base_dir / "thumbnails"
-        self.downloads_dir = self.base_dir / "downloads"
+	def __post_init__(self) -> None:
+		self.thumbs_dir	= self.base_dir / "thumbnails"
+		self.downloads_dir = self.base_dir / "downloads"
 
-        self.thumbs_dir.mkdir(parents=True, exist_ok=True)
-        self.downloads_dir.mkdir(parents=True, exist_ok=True)
+		self.thumbs_dir.mkdir(parents=True, exist_ok=True)
+		self.downloads_dir.mkdir(parents=True, exist_ok=True)
 
 
-    async def get_media(self, *args) -> Path:
-        """Return `Media(self, ...).get()`'s result. Intended for QML."""
-        return await Media(self, *args).get()
+	async def get_media(self, *args) -> Path:
+		"""Return `Media(self, ...).get()`'s result. Intended for QML."""
+		return await Media(self, *args).get()
 
 
-    async def get_thumbnail(self, width: float, height: float, *args) -> Path:
-        """Return `Thumbnail(self, ...).get()`'s result. Intended for QML."""
-        # QML sometimes pass float sizes, which matrix API doesn't like.
-        size = (round(width), round(height))
-        return await Thumbnail(
-            self, *args, wanted_size=size,  # type: ignore
-        ).get()
+	async def get_thumbnail(self, width: float, height: float, *args) -> Path:
+		"""Return `Thumbnail(self, ...).get()`'s result. Intended for QML."""
+		# QML sometimes pass float sizes, which matrix API doesn't like.
+		size = (round(width), round(height))
+		return await Thumbnail(
+			self, *args, wanted_size=size,  # type: ignore
+		).get()
 
 
 @dataclass
 class Media:
-    """A matrix media file that is downloaded or has yet to be.
+	"""A matrix media file that is downloaded or has yet to be.
 
-    If the `room_id` is not set, no `Transfer` model item will be registered
-    while this media is being downloaded.
-    """
+	If the `room_id` is not set, no `Transfer` model item will be registered
+	while this media is being downloaded.
+	"""
 
-    cache:          "MediaCache"             = field()
-    client_user_id: str                      = field()
-    mxc:            str                      = field()
-    title:          str                      = field()
-    room_id:        Optional[str]            = None
-    filesize:       Optional[int]            = None
-    crypt_dict:     Optional[Dict[str, Any]] = field(default=None, repr=False)
+	cache:		  "MediaCache"			 = field()
+	client_user_id: str					  = field()
+	mxc:			str					  = field()
+	title:		  str					  = field()
+	room_id:		Optional[str]			= None
+	filesize:	   Optional[int]			= None
+	crypt_dict:	 Optional[Dict[str, Any]] = field(default=None, repr=False)
 
 
-    def __post_init__(self) -> None:
-        self.mxc = re.sub(r"#auto$", "", self.mxc)
+	def __post_init__(self) -> None:
+		self.mxc = re.sub(r"#auto$", "", self.mxc)
 
-        if not re.match(r"^mxc://.+/.+", self.mxc):
-            raise ValueError(f"Invalid mxc URI: {self.mxc}")
+		if not re.match(r"^mxc://.+/.+", self.mxc):
+			raise ValueError(f"Invalid mxc URI: {self.mxc}")
 
 
-    @property
-    def local_path(self) -> Path:
-        """The path where the file either exists or should be downloaded.
+	@property
+	def local_path(self) -> Path:
+		"""The path where the file either exists or should be downloaded.
 
-        The returned paths are in this form:
-        ```
-            <base download folder>/<homeserver domain>/
-            <file title>_<mxc id>.<file extension>`
-        ```
-        e.g. `~/.cache/moment/downloads/matrix.org/foo_Hm24ar11i768b0el.png`.
-        """
+		The returned paths are in this form:
+		```
+			<base download folder>/<homeserver domain>/
+			<file title>_<mxc id>.<file extension>`
+		```
+		e.g. `~/.cache/moment/downloads/matrix.org/foo_Hm24ar11i768b0el.png`.
+		"""
 
-        parsed   = urlparse(self.mxc)
-        mxc_id   = parsed.path.lstrip("/")
-        title    = Path(self.title)
-        filename = f"{title.stem}_{mxc_id}{title.suffix}"
-        return self.cache.downloads_dir / parsed.netloc / filename
+		parsed   = urlparse(self.mxc)
+		mxc_id   = parsed.path.lstrip("/")
+		title	= Path(self.title)
+		filename = f"{title.stem}_{mxc_id}{title.suffix}"
+		return self.cache.downloads_dir / parsed.netloc / filename
 
 
-    async def get(self) -> Path:
-        """Return the cached file's path, downloading it first if needed."""
+	async def get(self) -> Path:
+		"""Return the cached file's path, downloading it first if needed."""
 
-        async with ACCESS_LOCKS[self.mxc]:
-            try:
-                return await self.get_local()
-            except FileNotFoundError:
-                return await self.create()
+		async with ACCESS_LOCKS[self.mxc]:
+			try:
+				return await self.get_local()
+			except FileNotFoundError:
+				return await self.create()
 
 
-    async def get_local(self) -> Path:
-        """Return a cached local existing path for this media or raise."""
+	async def get_local(self) -> Path:
+		"""Return a cached local existing path for this media or raise."""
 
-        if not self.local_path.exists():
-            raise FileNotFoundError()
+		if not self.local_path.exists():
+			raise FileNotFoundError()
 
-        return self.local_path
+		return self.local_path
 
 
-    async def create(self) -> Path:
-        """Download and cache the media file to disk."""
+	async def create(self) -> Path:
+		"""Download and cache the media file to disk."""
 
-        async with CONCURRENT_DOWNLOADS_LIMIT:
-            data = await self._get_remote_data()
+		async with CONCURRENT_DOWNLOADS_LIMIT:
+			data = await self._get_remote_data()
 
-        self.local_path.parent.mkdir(parents=True, exist_ok=True)
+		self.local_path.parent.mkdir(parents=True, exist_ok=True)
 
-        async with atomic_write(self.local_path, binary=True) as (file, done):
-            await file.write(data)
-            done()
+		async with atomic_write(self.local_path, binary=True) as (file, done):
+			await file.write(data)
+			done()
 
-        if type(self) is Media:
-            for event in self.cache.backend.mxc_events[self.mxc]:
-                event.media_local_path = self.local_path
+		if type(self) is Media:
+			for event in self.cache.backend.mxc_events[self.mxc]:
+				event.media_local_path = self.local_path
 
-        return self.local_path
+		return self.local_path
 
 
-    async def _get_remote_data(self) -> bytes:
-        """Return the file's data from the matrix server, decrypt if needed."""
+	async def _get_remote_data(self) -> bytes:
+		"""Return the file's data from the matrix server, decrypt if needed."""
 
-        client = self.cache.backend.clients[self.client_user_id]
+		client = self.cache.backend.clients[self.client_user_id]
 
-        transfer: Optional[Transfer] = None
-        model:    Optional[Model]    = None
+		transfer: Optional[Transfer] = None
+		model:	Optional[Model]	= None
 
-        if self.room_id:
-            model    = self.cache.backend.models[self.room_id, "transfers"]
-            transfer = Transfer(
-                id         = uuid4(),
-                is_upload  = False,
-                filepath   = self.local_path,
-                total_size = self.filesize or 0,
-                status     = TransferStatus.Transfering,
-            )
-            assert model is not None
-            client.transfer_tasks[transfer.id] = current_task()  # type: ignore
-            model[str(transfer.id)]            = transfer
+		if self.room_id:
+			model	= self.cache.backend.models[self.room_id, "transfers"]
+			transfer = Transfer(
+				id		 = uuid4(),
+				is_upload  = False,
+				filepath   = self.local_path,
+				total_size = self.filesize or 0,
+				status	 = TransferStatus.Transfering,
+			)
+			assert model is not None
+			client.transfer_tasks[transfer.id] = current_task()  # type: ignore
+			model[str(transfer.id)]			= transfer
 
-        try:
-            parsed = urlparse(self.mxc)
-            resp   = await client.download(
-                server_name = parsed.netloc,
-                media_id    = parsed.path.lstrip("/"),
-            )
-        except (nio.TransferCancelledError, asyncio.CancelledError):
-            if transfer and model:
-                del model[str(transfer.id)]
-                del client.transfer_tasks[transfer.id]
-            raise
+		try:
+			parsed = urlparse(self.mxc)
+			resp   = await client.download(
+				server_name = parsed.netloc,
+				media_id	= parsed.path.lstrip("/"),
+			)
+		except (nio.TransferCancelledError, asyncio.CancelledError):
+			if transfer and model:
+				del model[str(transfer.id)]
+				del client.transfer_tasks[transfer.id]
+			raise
 
-        if transfer and model:
-            del model[str(transfer.id)]
-            del client.transfer_tasks[transfer.id]
+		if transfer and model:
+			del model[str(transfer.id)]
+			del client.transfer_tasks[transfer.id]
 
-        return await self._decrypt(resp.body)
+		return await self._decrypt(resp.body)
 
 
-    async def _decrypt(self, data: bytes) -> bytes:
-        """Decrypt an encrypted file's data."""
+	async def _decrypt(self, data: bytes) -> bytes:
+		"""Decrypt an encrypted file's data."""
 
-        if not self.crypt_dict:
-            return data
+		if not self.crypt_dict:
+			return data
 
-        func = functools.partial(
-            nio.crypto.attachments.decrypt_attachment,
-            data,
-            self.crypt_dict["key"]["k"],
-            self.crypt_dict["hashes"]["sha256"],
-            self.crypt_dict["iv"],
-        )
+		func = functools.partial(
+			nio.crypto.attachments.decrypt_attachment,
+			data,
+			self.crypt_dict["key"]["k"],
+			self.crypt_dict["hashes"]["sha256"],
+			self.crypt_dict["iv"],
+		)
 
-        # Run in a separate thread
-        return await asyncio.get_event_loop().run_in_executor(None, func)
+		# Run in a separate thread
+		return await asyncio.get_event_loop().run_in_executor(None, func)
 
 
-    @classmethod
-    async def from_existing_file(
-        cls,
-        cache:          "MediaCache",
-        client_user_id: str,
-        mxc:            str,
-        existing:       Path,
-        overwrite:      bool = False,
-        **kwargs,
-    ) -> "Media":
-        """Copy an existing file to cache and return a `Media` for it."""
+	@classmethod
+	async def from_existing_file(
+		cls,
+		cache:		  "MediaCache",
+		client_user_id: str,
+		mxc:			str,
+		existing:	   Path,
+		overwrite:	  bool = False,
+		**kwargs,
+	) -> "Media":
+		"""Copy an existing file to cache and return a `Media` for it."""
 
-        media = cls(
-            cache          = cache,
-            client_user_id = client_user_id,
-            mxc            = mxc,
-            title          = existing.name,
-            filesize       = existing.stat().st_size,
-            **kwargs,
-        )
-        media.local_path.parent.mkdir(parents=True, exist_ok=True)
+		media = cls(
+			cache		  = cache,
+			client_user_id = client_user_id,
+			mxc			= mxc,
+			title		  = existing.name,
+			filesize	   = existing.stat().st_size,
+			**kwargs,
+		)
+		media.local_path.parent.mkdir(parents=True, exist_ok=True)
 
-        if not media.local_path.exists() or overwrite:
-            func = functools.partial(shutil.copy, existing, media.local_path)
-            await asyncio.get_event_loop().run_in_executor(None, func)
+		if not media.local_path.exists() or overwrite:
+			func = functools.partial(shutil.copy, existing, media.local_path)
+			await asyncio.get_event_loop().run_in_executor(None, func)
 
-        return media
+		return media
 
 
-    @classmethod
-    async def from_bytes(
-        cls,
-        cache:          "MediaCache",
-        client_user_id: str,
-        mxc:            str,
-        filename:       str,
-        data:           bytes,
-        overwrite:      bool = False,
-        **kwargs,
-    ) -> "Media":
-        """Create a cached file from bytes data and return a `Media` for it."""
+	@classmethod
+	async def from_bytes(
+		cls,
+		cache:		  "MediaCache",
+		client_user_id: str,
+		mxc:			str,
+		filename:	   str,
+		data:		   bytes,
+		overwrite:	  bool = False,
+		**kwargs,
+	) -> "Media":
+		"""Create a cached file from bytes data and return a `Media` for it."""
 
-        media = cls(
-            cache, client_user_id, mxc, filename, filesize=len(data), **kwargs,
-        )
-        media.local_path.parent.mkdir(parents=True, exist_ok=True)
+		media = cls(
+			cache, client_user_id, mxc, filename, filesize=len(data), **kwargs,
+		)
+		media.local_path.parent.mkdir(parents=True, exist_ok=True)
 
-        if not media.local_path.exists() or overwrite:
-            path = media.local_path
+		if not media.local_path.exists() or overwrite:
+			path = media.local_path
 
-            async with atomic_write(path, binary=True) as (file, done):
-                await file.write(data)
-                done()
+			async with atomic_write(path, binary=True) as (file, done):
+				await file.write(data)
+				done()
 
-        return media
+		return media
 
 
 @dataclass
 class Thumbnail(Media):
-    """A matrix media's thumbnail, which is downloaded or has yet to be."""
+	"""A matrix media's thumbnail, which is downloaded or has yet to be."""
 
-    wanted_size: Size = (800, 600)
+	wanted_size: Size = (800, 600)
 
-    server_size: Optional[Size] = field(init=False, repr=False, default=None)
+	server_size: Optional[Size] = field(init=False, repr=False, default=None)
 
 
-    @staticmethod
-    def normalize_size(size: Size) -> Size:
-        """Return standard `(width, height)` matrix thumbnail dimensions.
+	@staticmethod
+	def normalize_size(size: Size) -> Size:
+		"""Return standard `(width, height)` matrix thumbnail dimensions.
 
-        The Matrix specification defines a few standard thumbnail dimensions
-        for homeservers to store and return: 32x32, 96x96, 320x240, 640x480,
-        and 800x600.
+		The Matrix specification defines a few standard thumbnail dimensions
+		for homeservers to store and return: 32x32, 96x96, 320x240, 640x480,
+		and 800x600.
 
-        This method returns the best matching size for a `size` without
-        upscaling, e.g. passing `(641, 480)` will return `(800, 600)`.
-        """
+		This method returns the best matching size for a `size` without
+		upscaling, e.g. passing `(641, 480)` will return `(800, 600)`.
+		"""
 
-        if size[0] > 640 or size[1] > 480:
-            return (800, 600)
+		if size[0] > 640 or size[1] > 480:
+			return (800, 600)
 
-        if size[0] > 320 or size[1] > 240:
-            return (640, 480)
+		if size[0] > 320 or size[1] > 240:
+			return (640, 480)
 
-        if size[0] > 96 or size[1] > 96:
-            return (320, 240)
+		if size[0] > 96 or size[1] > 96:
+			return (320, 240)
 
-        if size[0] > 32 or size[1] > 32:
-            return (96, 96)
+		if size[0] > 32 or size[1] > 32:
+			return (96, 96)
 
-        return (32, 32)
+		return (32, 32)
 
 
-    @property
-    def local_path(self) -> Path:
-        """The path where the thumbnail either exists or should be downloaded.
+	@property
+	def local_path(self) -> Path:
+		"""The path where the thumbnail either exists or should be downloaded.
 
-        The returned paths are in this form:
-        ```
-            <base thumbnail folder>/<homeserver domain>/<standard size>/
-            <file title>_<mxc id>.<file extension>`
-        ```
-        e.g.
-        `~/.cache/moment/thumbnails/matrix.org/32x32/foo_Hm24ar11i768b0el.png`.
-        """
+		The returned paths are in this form:
+		```
+			<base thumbnail folder>/<homeserver domain>/<standard size>/
+			<file title>_<mxc id>.<file extension>`
+		```
+		e.g.
+		`~/.cache/moment/thumbnails/matrix.org/32x32/foo_Hm24ar11i768b0el.png`.
+		"""
 
-        size     = self.normalize_size(self.server_size or self.wanted_size)
-        size_dir = f"{size[0]}x{size[1]}"
+		size	 = self.normalize_size(self.server_size or self.wanted_size)
+		size_dir = f"{size[0]}x{size[1]}"
 
-        parsed   = urlparse(self.mxc)
-        mxc_id   = parsed.path.lstrip("/")
-        title    = Path(self.title)
-        filename = f"{title.stem}_{mxc_id}{title.suffix}"
+		parsed   = urlparse(self.mxc)
+		mxc_id   = parsed.path.lstrip("/")
+		title	= Path(self.title)
+		filename = f"{title.stem}_{mxc_id}{title.suffix}"
 
-        return self.cache.thumbs_dir / parsed.netloc / size_dir / filename
+		return self.cache.thumbs_dir / parsed.netloc / size_dir / filename
 
 
-    async def get_local(self) -> Path:
-        """Return an existing thumbnail path or raise `FileNotFoundError`.
+	async def get_local(self) -> Path:
+		"""Return an existing thumbnail path or raise `FileNotFoundError`.
 
-        If we have a bigger size thumbnail downloaded than the `wanted_size`
-        for the media, return it instead of asking the server for a
-        smaller thumbnail.
-        """
+		If we have a bigger size thumbnail downloaded than the `wanted_size`
+		for the media, return it instead of asking the server for a
+		smaller thumbnail.
+		"""
 
-        if self.local_path.exists():
-            return self.local_path
+		if self.local_path.exists():
+			return self.local_path
 
-        try_sizes = ((32, 32), (96, 96), (320, 240), (640, 480), (800, 600))
-        parts     = list(self.local_path.parts)
-        size      = self.normalize_size(self.server_size or self.wanted_size)
+		try_sizes = ((32, 32), (96, 96), (320, 240), (640, 480), (800, 600))
+		parts	 = list(self.local_path.parts)
+		size	  = self.normalize_size(self.server_size or self.wanted_size)
 
-        for width, height in try_sizes:
-            if width < size[0] or height < size[1]:
-                continue
+		for width, height in try_sizes:
+			if width < size[0] or height < size[1]:
+				continue
 
-            parts[-2] = f"{width}x{height}"
-            path      = Path("/".join(parts))
+			parts[-2] = f"{width}x{height}"
+			path	  = Path("/".join(parts))
 
-            if path.exists():
-                return path
+			if path.exists():
+				return path
 
-        raise FileNotFoundError()
+		raise FileNotFoundError()
 
 
-    async def _get_remote_data(self) -> bytes:
-        """Return the (decrypted) media file's content from the server."""
+	async def _get_remote_data(self) -> bytes:
+		"""Return the (decrypted) media file's content from the server."""
 
-        parsed = urlparse(self.mxc)
-        client = self.cache.backend.clients[self.client_user_id]
+		parsed = urlparse(self.mxc)
+		client = self.cache.backend.clients[self.client_user_id]
 
-        if self.crypt_dict:
-            # Matrix makes encrypted thumbs only available through the download
-            # end-point, not the thumbnail one
-            resp = await client.download(
-                server_name = parsed.netloc,
-                media_id    = parsed.path.lstrip("/"),
-            )
-        else:
-            resp = await client.thumbnail(
-                server_name = parsed.netloc,
-                media_id    = parsed.path.lstrip("/"),
-                width       = self.wanted_size[0],
-                height      = self.wanted_size[1],
-            )
+		if self.crypt_dict:
+			# Matrix makes encrypted thumbs only available through the download
+			# end-point, not the thumbnail one
+			resp = await client.download(
+				server_name = parsed.netloc,
+				media_id	= parsed.path.lstrip("/"),
+			)
+		else:
+			resp = await client.thumbnail(
+				server_name = parsed.netloc,
+				media_id	= parsed.path.lstrip("/"),
+				width	   = self.wanted_size[0],
+				height	  = self.wanted_size[1],
+			)
 
-        decrypted = await self._decrypt(resp.body)
+		decrypted = await self._decrypt(resp.body)
 
-        with io.BytesIO(decrypted) as img:
-            # The server may return a thumbnail bigger than what we asked for
-            self.server_size = PILImage.open(img).size
+		with io.BytesIO(decrypted) as img:
+			# The server may return a thumbnail bigger than what we asked for
+			self.server_size = PILImage.open(img).size
 
-        return decrypted
+		return decrypted

src/backend/models/filters.py

@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: LGPL-3.0-or-later
 
 from typing import (
-    TYPE_CHECKING, Any, Callable, Collection, Dict, List, Optional, Tuple,
+	TYPE_CHECKING, Any, Callable, Collection, Dict, List, Optional, Tuple,
 )
 
 from . import SyncId
@@ -10,185 +10,185 @@ from .model import Model
 from .proxy import ModelProxy
 
 if TYPE_CHECKING:
-    from .model_item import ModelItem
+	from .model_item import ModelItem
 
 
 class ModelFilter(ModelProxy):
-    """Filter data from one or more source models."""
+	"""Filter data from one or more source models."""
 
-    def __init__(self, sync_id: SyncId) -> None:
-        self.filtered_out: Dict[Tuple[Optional[SyncId], str], "ModelItem"] = {}
-        self.items_changed_callbacks: List[Callable[[], None]] = []
-        super().__init__(sync_id)
+	def __init__(self, sync_id: SyncId) -> None:
+		self.filtered_out: Dict[Tuple[Optional[SyncId], str], "ModelItem"] = {}
+		self.items_changed_callbacks: List[Callable[[], None]] = []
+		super().__init__(sync_id)
 
 
-    def accept_item(self, item: "ModelItem") -> bool:
-        """Return whether an item should be present or filtered out."""
-        return True
+	def accept_item(self, item: "ModelItem") -> bool:
+		"""Return whether an item should be present or filtered out."""
+		return True
 
 
-    def source_item_set(
-        self,
-        source: Model,
-        key,
-        value: "ModelItem",
-        _changed_fields: Optional[Dict[str, Any]] = None,
-    ) -> None:
-        with self.write_lock:
-            if self.accept_source(source):
-                value = self.convert_item(value)
+	def source_item_set(
+		self,
+		source: Model,
+		key,
+		value: "ModelItem",
+		_changed_fields: Optional[Dict[str, Any]] = None,
+	) -> None:
+		with self.write_lock:
+			if self.accept_source(source):
+				value = self.convert_item(value)
 
-                if self.accept_item(value):
-                    self.__setitem__(
-                        (source.sync_id, key), value, _changed_fields,
-                    )
-                    self.filtered_out.pop((source.sync_id, key), None)
-                else:
-                    self.filtered_out[source.sync_id, key] = value
-                    self.pop((source.sync_id, key), None)
+				if self.accept_item(value):
+					self.__setitem__(
+						(source.sync_id, key), value, _changed_fields,
+					)
+					self.filtered_out.pop((source.sync_id, key), None)
+				else:
+					self.filtered_out[source.sync_id, key] = value
+					self.pop((source.sync_id, key), None)
 
-                for callback in self.items_changed_callbacks:
-                    callback()
+				for callback in self.items_changed_callbacks:
+					callback()
 
 
-    def source_item_deleted(self, source: Model, key) -> None:
-        with self.write_lock:
-            if self.accept_source(source):
-                try:
-                    del self[source.sync_id, key]
-                except KeyError:
-                    del self.filtered_out[source.sync_id, key]
+	def source_item_deleted(self, source: Model, key) -> None:
+		with self.write_lock:
+			if self.accept_source(source):
+				try:
+					del self[source.sync_id, key]
+				except KeyError:
+					del self.filtered_out[source.sync_id, key]
 
-                for callback in self.items_changed_callbacks:
-                    callback()
+				for callback in self.items_changed_callbacks:
+					callback()
 
 
-    def source_cleared(self, source: Model) -> None:
-        with self.write_lock:
-            if self.accept_source(source):
-                for source_sync_id, key in self.copy():
-                    if source_sync_id == source.sync_id:
-                        try:
-                            del self[source.sync_id, key]
-                        except KeyError:
-                            del self.filtered_out[source.sync_id, key]
+	def source_cleared(self, source: Model) -> None:
+		with self.write_lock:
+			if self.accept_source(source):
+				for source_sync_id, key in self.copy():
+					if source_sync_id == source.sync_id:
+						try:
+							del self[source.sync_id, key]
+						except KeyError:
+							del self.filtered_out[source.sync_id, key]
 
-                for callback in self.items_changed_callbacks:
-                    callback()
+				for callback in self.items_changed_callbacks:
+					callback()
 
 
-    def refilter(
-        self,
-        only_if: Optional[Callable[["ModelItem"], bool]] = None,
-    ) -> None:
-        """Recheck every item to decide if they should be filtered out."""
+	def refilter(
+		self,
+		only_if: Optional[Callable[["ModelItem"], bool]] = None,
+	) -> None:
+		"""Recheck every item to decide if they should be filtered out."""
 
-        with self.write_lock:
-            take_out   = []
-            bring_back = []
+		with self.write_lock:
+			take_out   = []
+			bring_back = []
 
-            for key, item in sorted(self.items(), key=lambda kv: kv[1]):
-                if only_if and not only_if(item):
-                    continue
+			for key, item in sorted(self.items(), key=lambda kv: kv[1]):
+				if only_if and not only_if(item):
+					continue
 
-                if not self.accept_item(item):
-                    take_out.append(key)
+				if not self.accept_item(item):
+					take_out.append(key)
 
-            for key, item in self.filtered_out.items():
-                if only_if and not only_if(item):
-                    continue
+			for key, item in self.filtered_out.items():
+				if only_if and not only_if(item):
+					continue
 
-                if self.accept_item(item):
-                    bring_back.append(key)
+				if self.accept_item(item):
+					bring_back.append(key)
 
-            with self.batch_remove():
-                for key in take_out:
-                    self.filtered_out[key] = self.pop(key)
+			with self.batch_remove():
+				for key in take_out:
+					self.filtered_out[key] = self.pop(key)
 
-            for key in bring_back:
-                self[key] = self.filtered_out.pop(key)
+			for key in bring_back:
+				self[key] = self.filtered_out.pop(key)
 
-            if take_out or bring_back:
-                for callback in self.items_changed_callbacks:
-                    callback()
+			if take_out or bring_back:
+				for callback in self.items_changed_callbacks:
+					callback()
 
 
 class FieldStringFilter(ModelFilter):
-    """Filter source models based on if their fields matches a string.
+	"""Filter source models based on if their fields matches a string.
 
-    This is used for filter fields in QML: the user enters some text and only
-    items with a certain field (typically `display_name`) that starts with the
-    entered text will be shown.
+	This is used for filter fields in QML: the user enters some text and only
+	items with a certain field (typically `display_name`) that starts with the
+	entered text will be shown.
 
-    Matching is done using "smart case": insensitive if the filter text is
-    all lowercase, sensitive otherwise.
-    """
+	Matching is done using "smart case": insensitive if the filter text is
+	all lowercase, sensitive otherwise.
+	"""
 
-    def __init__(
-        self,
-        sync_id:                    SyncId,
-        fields:                     Collection[str],
-        no_filter_accept_all_items: bool = True,
-    ) -> None:
+	def __init__(
+		self,
+		sync_id:					SyncId,
+		fields:					 Collection[str],
+		no_filter_accept_all_items: bool = True,
+	) -> None:
 
-        self.fields                     = fields
-        self.no_filter_accept_all_items = no_filter_accept_all_items
-        self._filter: str               = ""
+		self.fields					 = fields
+		self.no_filter_accept_all_items = no_filter_accept_all_items
+		self._filter: str			   = ""
 
 
-        super().__init__(sync_id)
+		super().__init__(sync_id)
 
 
-    @property
-    def filter(self) -> str:
-        return self._filter
+	@property
+	def filter(self) -> str:
+		return self._filter
 
 
-    @filter.setter
-    def filter(self, value: str) -> None:
-        if value != self._filter:
-            self._filter = value
-            self.refilter()
+	@filter.setter
+	def filter(self, value: str) -> None:
+		if value != self._filter:
+			self._filter = value
+			self.refilter()
 
 
-    def accept_item(self, item: "ModelItem") -> bool:
-        if not self.filter:
-            return self.no_filter_accept_all_items
+	def accept_item(self, item: "ModelItem") -> bool:
+		if not self.filter:
+			return self.no_filter_accept_all_items
 
-        fields    = {f: getattr(item, f) for f in self.fields}
-        filtr     = self.filter
-        lowercase = filtr.lower()
+		fields	= {f: getattr(item, f) for f in self.fields}
+		filtr	 = self.filter
+		lowercase = filtr.lower()
 
-        if lowercase == filtr:
-            # Consider case only if filter isn't all lowercase
-            filtr        = lowercase
-            fields = {name: value.lower() for name, value in fields.items()}
+		if lowercase == filtr:
+			# Consider case only if filter isn't all lowercase
+			filtr		= lowercase
+			fields = {name: value.lower() for name, value in fields.items()}
 
-        return self.match(fields, filtr)
+		return self.match(fields, filtr)
 
 
-    def match(self, fields: Dict[str, str], filtr: str) -> bool:
-        for value in fields.values():
-            if value.startswith(filtr):
-                return True
+	def match(self, fields: Dict[str, str], filtr: str) -> bool:
+		for value in fields.values():
+			if value.startswith(filtr):
+				return True
 
-        return False
+		return False
 
 
 class FieldSubstringFilter(FieldStringFilter):
-    """Fuzzy-like alternative to `FieldStringFilter`.
+	"""Fuzzy-like alternative to `FieldStringFilter`.
 
-    All words in the filter string must fully or partially match words in the
-    item field values, e.g. "red l" can match "red light",
-    "tired legs", "light red" (order of the filter words doesn't matter),
-    but not just "red" or "light" by themselves.
-    """
+	All words in the filter string must fully or partially match words in the
+	item field values, e.g. "red l" can match "red light",
+	"tired legs", "light red" (order of the filter words doesn't matter),
+	but not just "red" or "light" by themselves.
+	"""
 
-    def match(self, fields: Dict[str, str], filtr: str) -> bool:
-        text = " ".join(fields.values())
+	def match(self, fields: Dict[str, str], filtr: str) -> bool:
+		text = " ".join(fields.values())
 
-        for word in filtr.split():
-            if word and word not in text:
-                return False
+		for word in filtr.split():
+			if word and word not in text:
+				return False
 
-        return True
+		return True

src/backend/models/items.py

@@ -14,7 +14,7 @@ import lxml  # nosec
 import nio
 
 from ..presence import Presence
-from ..utils import AutoStrEnum, auto, strip_html_tags
+from ..utils import AutoStrEnum, auto, strip_html_tags, serialize_value_for_qml
 from .model_item import ModelItem
 
 OptionalExceptionType = Union[Type[None], Type[Exception]]
@@ -23,415 +23,423 @@ ZERO_DATE = datetime.fromtimestamp(0)
 
 
 class TypeSpecifier(AutoStrEnum):
-    """Enum providing clarification of purpose for some matrix events."""
+	"""Enum providing clarification of purpose for some matrix events."""
 
-    Unset            = auto()
-    ProfileChange    = auto()
-    MembershipChange = auto()
+	Unset			= auto()
+	ProfileChange	= auto()
+	MembershipChange = auto()
+	Reaction          = auto()
+	ReactionRedaction = auto()
+	MessageReplace    = auto()
 
 
 class PingStatus(AutoStrEnum):
-    """Enum for the status of a homeserver ping operation."""
+	"""Enum for the status of a homeserver ping operation."""
 
-    Done    = auto()
-    Pinging = auto()
-    Failed  = auto()
+	Done	= auto()
+	Pinging = auto()
+	Failed  = auto()
 
 
 class RoomNotificationOverride(AutoStrEnum):
-    """Possible per-room notification override settings, as displayed in the
-    left sidepane's context menu when right-clicking a room.
-    """
-    UseDefaultSettings = auto()
-    AllEvents          = auto()
-    HighlightsOnly     = auto()
-    IgnoreEvents       = auto()
+	"""Possible per-room notification override settings, as displayed in the
+	left sidepane's context menu when right-clicking a room.
+	"""
+	UseDefaultSettings = auto()
+	AllEvents		  = auto()
+	HighlightsOnly	 = auto()
+	IgnoreEvents	   = auto()
 
 
 @dataclass(eq=False)
 class Homeserver(ModelItem):
-    """A homeserver we can connect to. The `id` field is the server's URL."""
+	"""A homeserver we can connect to. The `id` field is the server's URL."""
 
-    id:             str         = field()
-    name:           str         = field()
-    site_url:       str         = field()
-    country:        str         = field()
-    ping:           int         = -1
-    status:         PingStatus  = PingStatus.Pinging
-    stability:      float       = -1
-    downtimes_ms:   List[float] = field(default_factory=list)
+	id:			 str		 = field()
+	name:		   str		 = field()
+	site_url:	   str		 = field()
+	country:		str		 = field()
+	ping:		   int		 = -1
+	status:		 PingStatus  = PingStatus.Pinging
+	stability:	  float	   = -1
+	downtimes_ms:   List[float] = field(default_factory=list)
 
-    def __lt__(self, other: "Homeserver") -> bool:
-        return (self.name.lower(), self.id) < (other.name.lower(), other.id)
+	def __lt__(self, other: "Homeserver") -> bool:
+		return (self.name.lower(), self.id) < (other.name.lower(), other.id)
 
 
 @dataclass(eq=False)
 class Account(ModelItem):
-    """A logged in matrix account."""
+	"""A logged in matrix account."""
 
-    id:               str      = field()
-    order:            int      = -1
-    display_name:     str      = ""
-    avatar_url:       str      = ""
-    max_upload_size:  int      = 0
-    profile_updated:  datetime = ZERO_DATE
-    connecting:       bool     = False
-    total_unread:     int      = 0
-    total_highlights: int      = 0
-    local_unreads:    bool     = False
-    ignored_users:    Set[str] = field(default_factory=set)
+	id:			   str	  = field()
+	order:			int	  = -1
+	display_name:	 str	  = ""
+	avatar_url:	   str	  = ""
+	max_upload_size:  int	  = 0
+	profile_updated:  datetime = ZERO_DATE
+	connecting:	   bool	 = False
+	total_unread:	 int	  = 0
+	total_highlights: int	  = 0
+	local_unreads:	bool	 = False
+	ignored_users:	Set[str] = field(default_factory=set)
 
-    # For some reason, Account cannot inherit Presence, because QML keeps
-    # complaining type error on unknown file
-    presence_support: bool           = False
-    save_presence:    bool           = True
-    presence:         Presence.State = Presence.State.offline
-    currently_active: bool           = False
-    last_active_at:   datetime       = ZERO_DATE
-    status_msg:       str            = ""
+	# For some reason, Account cannot inherit Presence, because QML keeps
+	# complaining type error on unknown file
+	presence_support: bool		   = False
+	save_presence:	bool		   = True
+	presence:		 Presence.State = Presence.State.offline
+	currently_active: bool		   = False
+	last_active_at:   datetime	   = ZERO_DATE
+	status_msg:	   str			= ""
 
-    def __lt__(self, other: "Account") -> bool:
-        return (self.order, self.id) < (other.order, other.id)
+	def __lt__(self, other: "Account") -> bool:
+		return (self.order, self.id) < (other.order, other.id)
 
 
 @dataclass(eq=False)
 class PushRule(ModelItem):
-    """A push rule configured for one of our account."""
+	"""A push rule configured for one of our account."""
 
-    id:           Tuple[str, str]      = field()  # (kind.value, rule_id)
-    kind:         nio.PushRuleKind     = field()
-    rule_id:      str                  = field()
-    order:        int                  = field()
-    default:      bool                 = field()
-    enabled:      bool                 = True
-    conditions:   List[Dict[str, Any]] = field(default_factory=list)
-    pattern:      str                  = ""
-    actions:      List[Dict[str, Any]] = field(default_factory=list)
-    notify:       bool                 = False
-    highlight:    bool                 = False
-    bubble:       bool                 = False
-    sound:        str                  = ""  # usually "default" when set
-    urgency_hint: bool                 = False
+	id:		   Tuple[str, str]	  = field()  # (kind.value, rule_id)
+	kind:		 nio.PushRuleKind	 = field()
+	rule_id:	  str				  = field()
+	order:		int				  = field()
+	default:	  bool				 = field()
+	enabled:	  bool				 = True
+	conditions:   List[Dict[str, Any]] = field(default_factory=list)
+	pattern:	  str				  = ""
+	actions:	  List[Dict[str, Any]] = field(default_factory=list)
+	notify:	   bool				 = False
+	highlight:	bool				 = False
+	bubble:	   bool				 = False
+	sound:		str				  = ""  # usually "default" when set
+	urgency_hint: bool				 = False
 
-    def __lt__(self, other: "PushRule") -> bool:
-        return (
-            self.kind is nio.PushRuleKind.underride,
-            self.kind is nio.PushRuleKind.sender,
-            self.kind is nio.PushRuleKind.room,
-            self.kind is nio.PushRuleKind.content,
-            self.kind is nio.PushRuleKind.override,
-            self.order,
-            self.id,
-        ) < (
-            other.kind is nio.PushRuleKind.underride,
-            other.kind is nio.PushRuleKind.sender,
-            other.kind is nio.PushRuleKind.room,
-            other.kind is nio.PushRuleKind.content,
-            other.kind is nio.PushRuleKind.override,
-            other.order,
-            other.id,
-        )
+	def __lt__(self, other: "PushRule") -> bool:
+		return (
+			self.kind is nio.PushRuleKind.underride,
+			self.kind is nio.PushRuleKind.sender,
+			self.kind is nio.PushRuleKind.room,
+			self.kind is nio.PushRuleKind.content,
+			self.kind is nio.PushRuleKind.override,
+			self.order,
+			self.id,
+		) < (
+			other.kind is nio.PushRuleKind.underride,
+			other.kind is nio.PushRuleKind.sender,
+			other.kind is nio.PushRuleKind.room,
+			other.kind is nio.PushRuleKind.content,
+			other.kind is nio.PushRuleKind.override,
+			other.order,
+			other.id,
+		)
 
 
 @dataclass
 class Room(ModelItem):
-    """A matrix room we are invited to, are or were member of."""
+	"""A matrix room we are invited to, are or were member of."""
 
-    id:             str  = field()
-    for_account:    str  = ""
-    given_name:     str  = ""
-    display_name:   str  = ""
-    main_alias:     str  = ""
-    avatar_url:     str  = ""
-    plain_topic:    str  = ""
-    topic:          str  = ""
-    inviter_id:     str  = ""
-    inviter_name:   str  = ""
-    inviter_avatar: str  = ""
-    left:           bool = False
+	id:			 str  = field()
+	for_account:	str  = ""
+	given_name:	 str  = ""
+	display_name:   str  = ""
+	main_alias:	 str  = ""
+	avatar_url:	 str  = ""
+	plain_topic:	str  = ""
+	topic:		  str  = ""
+	inviter_id:	 str  = ""
+	inviter_name:   str  = ""
+	inviter_avatar: str  = ""
+	left:		   bool = False
 
-    typing_members: List[str] = field(default_factory=list)
+	typing_members: List[str] = field(default_factory=list)
 
-    federated:          bool = True
-    encrypted:          bool = False
-    unverified_devices: bool = False
-    invite_required:    bool = True
-    guests_allowed:     bool = True
+	federated:		  bool = True
+	encrypted:		  bool = False
+	unverified_devices: bool = False
+	invite_required:	bool = True
+	guests_allowed:	 bool = True
 
-    default_power_level:  int  = 0
-    own_power_level:      int  = 0
-    can_invite:           bool = False
-    can_kick:             bool = False
-    can_redact_all:       bool = False
-    can_send_messages:    bool = False
-    can_set_name:         bool = False
-    can_set_topic:        bool = False
-    can_set_avatar:       bool = False
-    can_set_encryption:   bool = False
-    can_set_join_rules:   bool = False
-    can_set_guest_access: bool = False
-    can_set_power_levels: bool = False
+	default_power_level:  int  = 0
+	own_power_level:	  int  = 0
+	can_invite:		   bool = False
+	can_kick:			 bool = False
+	can_redact_all:	   bool = False
+	can_send_messages:	bool = False
+	can_set_name:		 bool = False
+	can_set_topic:		bool = False
+	can_set_avatar:	   bool = False
+	can_set_encryption:   bool = False
+	can_set_join_rules:   bool = False
+	can_set_guest_access: bool = False
+	can_set_power_levels: bool = False
 
-    last_event_date: datetime = ZERO_DATE
+	last_event_date: datetime = ZERO_DATE
 
-    unreads:       int  = 0
-    highlights:    int  = 0
-    local_unreads: bool = False
+	unreads:	   int  = 0
+	highlights:	int  = 0
+	local_unreads: bool = False
 
-    notification_setting: RoomNotificationOverride = \
-        RoomNotificationOverride.UseDefaultSettings
+	notification_setting: RoomNotificationOverride = \
+		RoomNotificationOverride.UseDefaultSettings
 
-    lexical_sorting: bool = False
-    pinned:          bool = False
+	lexical_sorting: bool = False
+	pinned:		  bool = False
 
-    # Allowed keys: "last_event_date", "unreads", "highlights", "local_unreads"
-    # Keys in this dict will override their corresponding item fields for the
-    # __lt__ method. This is used when we want to lock a room's position,
-    # e.g. to avoid having the room move around when it is focused in the GUI
-    _sort_overrides: Dict[str, Any] = field(default_factory=dict)
+	# Allowed keys: "last_event_date", "unreads", "highlights", "local_unreads"
+	# Keys in this dict will override their corresponding item fields for the
+	# __lt__ method. This is used when we want to lock a room's position,
+	# e.g. to avoid having the room move around when it is focused in the GUI
+	_sort_overrides: Dict[str, Any] = field(default_factory=dict)
 
-    def _sorting(self, key: str) -> Any:
-        return self._sort_overrides.get(key, getattr(self, key))
+	def _sorting(self, key: str) -> Any:
+		return self._sort_overrides.get(key, getattr(self, key))
 
-    def __lt__(self, other: "Room") -> bool:
-        by_activity = not self.lexical_sorting
+	def __lt__(self, other: "Room") -> bool:
+		by_activity = not self.lexical_sorting
 
-        return (
-            self.for_account,
-            other.pinned,
-            self.left,  # Left rooms may have an inviter_id, check them first
-            bool(other.inviter_id),
-            bool(by_activity and other._sorting("highlights")),
-            bool(by_activity and other._sorting("unreads")),
-            bool(by_activity and other._sorting("local_unreads")),
-            other._sorting("last_event_date") if by_activity else ZERO_DATE,
-            (self.display_name or self.id).lower(),
-            self.id,
+		return (
+			self.for_account,
+			other.pinned,
+			self.left,  # Left rooms may have an inviter_id, check them first
+			bool(other.inviter_id),
+			bool(by_activity and other._sorting("highlights")),
+			bool(by_activity and other._sorting("unreads")),
+			bool(by_activity and other._sorting("local_unreads")),
+			other._sorting("last_event_date") if by_activity else ZERO_DATE,
+			(self.display_name or self.id).lower(),
+			self.id,
 
-        ) < (
-            other.for_account,
-            self.pinned,
-            other.left,
-            bool(self.inviter_id),
-            bool(by_activity and self._sorting("highlights")),
-            bool(by_activity and self._sorting("unreads")),
-            bool(by_activity and self._sorting("local_unreads")),
-            self._sorting("last_event_date") if by_activity else ZERO_DATE,
-            (other.display_name or other.id).lower(),
-            other.id,
-        )
+		) < (
+			other.for_account,
+			self.pinned,
+			other.left,
+			bool(self.inviter_id),
+			bool(by_activity and self._sorting("highlights")),
+			bool(by_activity and self._sorting("unreads")),
+			bool(by_activity and self._sorting("local_unreads")),
+			self._sorting("last_event_date") if by_activity else ZERO_DATE,
+			(other.display_name or other.id).lower(),
+			other.id,
+		)
 
 
 @dataclass(eq=False)
 class AccountOrRoom(Account, Room):
-    """The left sidepane in the GUI lists a mixture of accounts and rooms
-    giving a tree view illusion. Since all items in a QML ListView must have
-    the same available properties, this class inherits both
-    `Account` and `Room` to fulfill that purpose.
-    """
+	"""The left sidepane in the GUI lists a mixture of accounts and rooms
+	giving a tree view illusion. Since all items in a QML ListView must have
+	the same available properties, this class inherits both
+	`Account` and `Room` to fulfill that purpose.
+	"""
 
-    type:          Union[Type[Account], Type[Room]] = Account
-    account_order: int                              = -1
+	type:		  Union[Type[Account], Type[Room]] = Account
+	account_order: int							  = -1
 
-    def __lt__(self, other: "AccountOrRoom") -> bool:  # type: ignore
-        by_activity = not self.lexical_sorting
+	def __lt__(self, other: "AccountOrRoom") -> bool:  # type: ignore
+		by_activity = not self.lexical_sorting
 
-        return (
-            self.account_order,
-            self.id if self.type is Account else self.for_account,
-            other.type is Account,
-            other.pinned,
-            self.left,
-            bool(other.inviter_id),
-            bool(by_activity and other._sorting("highlights")),
-            bool(by_activity and other._sorting("unreads")),
-            bool(by_activity and other._sorting("local_unreads")),
-            other._sorting("last_event_date") if by_activity else ZERO_DATE,
-            (self.display_name or self.id).lower(),
-            self.id,
+		return (
+			self.account_order,
+			self.id if self.type is Account else self.for_account,
+			other.type is Account,
+			other.pinned,
+			self.left,
+			bool(other.inviter_id),
+			bool(by_activity and other._sorting("highlights")),
+			bool(by_activity and other._sorting("unreads")),
+			bool(by_activity and other._sorting("local_unreads")),
+			other._sorting("last_event_date") if by_activity else ZERO_DATE,
+			(self.display_name or self.id).lower(),
+			self.id,
 
-        ) < (
-            other.account_order,
-            other.id if other.type is Account else other.for_account,
-            self.type is Account,
-            self.pinned,
-            other.left,
-            bool(self.inviter_id),
-            bool(by_activity and self._sorting("highlights")),
-            bool(by_activity and self._sorting("unreads")),
-            bool(by_activity and self._sorting("local_unreads")),
-            self._sorting("last_event_date") if by_activity else ZERO_DATE,
-            (other.display_name or other.id).lower(),
-            other.id,
-        )
+		) < (
+			other.account_order,
+			other.id if other.type is Account else other.for_account,
+			self.type is Account,
+			self.pinned,
+			other.left,
+			bool(self.inviter_id),
+			bool(by_activity and self._sorting("highlights")),
+			bool(by_activity and self._sorting("unreads")),
+			bool(by_activity and self._sorting("local_unreads")),
+			self._sorting("last_event_date") if by_activity else ZERO_DATE,
+			(other.display_name or other.id).lower(),
+			other.id,
+		)
 
 
 @dataclass(eq=False)
 class Member(ModelItem):
-    """A member in a matrix room."""
+	"""A member in a matrix room."""
 
-    id:              str      = field()
-    display_name:    str      = ""
-    avatar_url:      str      = ""
-    typing:          bool     = False
-    power_level:     int      = 0
-    invited:         bool     = False
-    ignored:         bool     = False
-    profile_updated: datetime = ZERO_DATE
-    last_read_event: str      = ""
+	id:			  str	  = field()
+	display_name:	str	  = ""
+	avatar_url:	  str	  = ""
+	typing:		  bool	 = False
+	power_level:	 int	  = 0
+	invited:		 bool	 = False
+	ignored:		 bool	 = False
+	profile_updated: datetime = ZERO_DATE
+	last_read_event: str	  = ""
 
-    presence:         Presence.State = Presence.State.offline
-    currently_active: bool           = False
-    last_active_at:   datetime       = ZERO_DATE
-    status_msg:       str            = ""
+	presence:		 Presence.State = Presence.State.offline
+	currently_active: bool		   = False
+	last_active_at:   datetime	   = ZERO_DATE
+	status_msg:	   str			= ""
 
-    def __lt__(self, other: "Member") -> bool:
-        return (
-            self.invited,
-            other.power_level,
-            self.ignored,
-            Presence.State.offline if self.ignored else self.presence,
-            (self.display_name or self.id[1:]).lower(),
-            self.id,
-        ) < (
-            other.invited,
-            self.power_level,
-            other.ignored,
-            Presence.State.offline if other.ignored else other.presence,
-            (other.display_name or other.id[1:]).lower(),
-            other.id,
-        )
+	def __lt__(self, other: "Member") -> bool:
+		return (
+			self.invited,
+			other.power_level,
+			self.ignored,
+			Presence.State.offline if self.ignored else self.presence,
+			(self.display_name or self.id[1:]).lower(),
+			self.id,
+		) < (
+			other.invited,
+			self.power_level,
+			other.ignored,
+			Presence.State.offline if other.ignored else other.presence,
+			(other.display_name or other.id[1:]).lower(),
+			other.id,
+		)
 
 
 class TransferStatus(AutoStrEnum):
-    """Enum describing the status of an upload operation."""
+	"""Enum describing the status of an upload operation."""
 
-    Preparing   = auto()
-    Transfering = auto()
-    Caching     = auto()
-    Error       = auto()
+	Preparing   = auto()
+	Transfering = auto()
+	Caching	 = auto()
+	Error	   = auto()
 
 
 @dataclass(eq=False)
 class Transfer(ModelItem):
-    """Represent a running or failed file upload/download operation."""
+	"""Represent a running or failed file upload/download operation."""
 
-    id:        UUID = field()
-    is_upload: bool = field()
-    filepath:  Path = Path("-")
+	id:		UUID = field()
+	is_upload: bool = field()
+	filepath:  Path = Path("-")
 
-    total_size:  int       = 0
-    transferred: int       = 0
-    speed:       float     = 0
-    time_left:   timedelta = timedelta(0)
-    paused:      bool      = False
+	total_size:  int	   = 0
+	transferred: int	   = 0
+	speed:	   float	 = 0
+	time_left:   timedelta = timedelta(0)
+	paused:	  bool	  = False
 
-    status:     TransferStatus        = TransferStatus.Preparing
-    error:      OptionalExceptionType = type(None)
-    error_args: Tuple[Any, ...]       = ()
+	status:	 TransferStatus		= TransferStatus.Preparing
+	error:	  OptionalExceptionType = type(None)
+	error_args: Tuple[Any, ...]	   = ()
 
-    start_date: datetime = field(init=False, default_factory=datetime.now)
+	start_date: datetime = field(init=False, default_factory=datetime.now)
 
 
-    def __lt__(self, other: "Transfer") -> bool:
-        return (self.start_date, self.id) > (other.start_date, other.id)
+	def __lt__(self, other: "Transfer") -> bool:
+		return (self.start_date, self.id) > (other.start_date, other.id)
 
 
 @dataclass(eq=False)
 class Event(ModelItem):
-    """A matrix state event or message."""
+	"""A matrix state event or message."""
 
-    id:            str                 = field()
-    event_id:      str                 = field()
-    event_type:    Type[nio.Event]     = field()
-    date:          datetime            = field()
-    sender_id:     str                 = field()
-    sender_name:   str                 = field()
-    sender_avatar: str                 = field()
-    fetch_profile: bool                = False
+	id:			str				 = field()
+	event_id:	  str				 = field()
+	event_type:	Type[nio.Event]	 = field()
+	date:		  datetime			= field()
+	sender_id:	 str				 = field()
+	sender_name:   str				 = field()
+	sender_avatar: str				 = field()
+	fetch_profile: bool				= False
+	hidden:		bool				= False
 
-    content:           str                   = ""
-    inline_content:    str                   = ""
-    reason:            str                   = ""
-    links:             List[str]             = field(default_factory=list)
-    mentions:          List[Tuple[str, str]] = field(default_factory=list)
+	content:		   str				   = ""
+	inline_content:	str				   = ""
+	reason:			str				   = ""
+	links:			 List[str]			 = field(default_factory=list)
+	mentions:		  List[Tuple[str, str]] = field(default_factory=list)
 
-    type_specifier: TypeSpecifier = TypeSpecifier.Unset
+	reactions:		 Dict[str, Dict[str, Any]] = field(default_factory=dict)
+	replaced:		  bool				  = False
+	content_history:   List[Dict[str, Any]]  = field(default_factory=list)
+	type_specifier: TypeSpecifier = TypeSpecifier.Unset
 
-    target_id:     str = ""
-    target_name:   str = ""
-    target_avatar: str = ""
-    redacter_id:   str = ""
-    redacter_name: str = ""
+	target_id:	 str = ""
+	target_name:   str = ""
+	target_avatar: str = ""
+	redacter_id:   str = ""
+	redacter_name: str = ""
 
-    # {user_id: server_timestamp} - QML can't parse dates from JSONified dicts
-    last_read_by:  Dict[str, int] = field(default_factory=dict)
-    read_by_count: int            = 0
+	# {user_id: server_timestamp} - QML can't parse dates from JSONified dicts
+	last_read_by:  Dict[str, int] = field(default_factory=dict)
+	read_by_count: int			= 0
 
-    is_local_echo: bool                = False
-    source:        Optional[nio.Event] = None
+	is_local_echo: bool				= False
+	source:		Optional[nio.Event] = None
 
-    media_url:        str              = ""
-    media_http_url:   str              = ""
-    media_title:      str              = ""
-    media_width:      int              = 0
-    media_height:     int              = 0
-    media_duration:   int              = 0
-    media_size:       int              = 0
-    media_mime:       str              = ""
-    media_crypt_dict: Dict[str, Any]   = field(default_factory=dict)
-    media_local_path: Union[str, Path] = ""
+	media_url:		str			  = ""
+	media_http_url:   str			  = ""
+	media_title:	  str			  = ""
+	media_width:	  int			  = 0
+	media_height:	 int			  = 0
+	media_duration:   int			  = 0
+	media_size:	   int			  = 0
+	media_mime:	   str			  = ""
+	media_crypt_dict: Dict[str, Any]   = field(default_factory=dict)
+	media_local_path: Union[str, Path] = ""
 
-    thumbnail_url:        str            = ""
-    thumbnail_mime:       str            = ""
-    thumbnail_width:      int            = 0
-    thumbnail_height:     int            = 0
-    thumbnail_crypt_dict: Dict[str, Any] = field(default_factory=dict)
+	thumbnail_url:		str			= ""
+	thumbnail_mime:	   str			= ""
+	thumbnail_width:	  int			= 0
+	thumbnail_height:	 int			= 0
+	thumbnail_crypt_dict: Dict[str, Any] = field(default_factory=dict)
 
-    def __lt__(self, other: "Event") -> bool:
-        return (self.date, self.id) > (other.date, other.id)
+	def __lt__(self, other: "Event") -> bool:
+		return (self.date, self.id) > (other.date, other.id)
 
-    @property
-    def plain_content(self) -> str:
-        """Plaintext version of the event's content."""
+	@property
+	def plain_content(self) -> str:
+		"""Plaintext version of the event's content."""
 
-        if isinstance(self.source, nio.RoomMessageText):
-            return self.source.body
+		if isinstance(self.source, nio.RoomMessageText):
+			return self.source.body
 
-        return strip_html_tags(self.content)
+		return strip_html_tags(self.content)
 
-    @staticmethod
-    def parse_links(text: str) -> List[str]:
-        """Return list of URLs (`<a href=...>` tags) present in the content."""
+	@staticmethod
+	def parse_links(text: str) -> List[str]:
+		"""Return list of URLs (`<a href=...>` tags) present in the content."""
 
-        ignore = []
+		ignore = []
 
-        if "<mx-reply>" in text or "mention" in text:
-            parser = lxml.html.etree.HTMLParser()
-            tree   = lxml.etree.fromstring(text, parser)
-            ignore = [
-                lxml.etree.tostring(matching_element)
-                for ugly_disgusting_xpath in [
-                    # Match mx-reply > blockquote > second a (user ID link)
-                    "//mx-reply/blockquote/a[count(preceding-sibling::*)<=1]",
-                    # Match <a> tags with a mention class
-                    '//a[contains(concat(" ",normalize-space(@class)," ")'
-                    '," mention ")]',
-                ]
-                for matching_element in tree.xpath(ugly_disgusting_xpath)
-            ]
+		if "<mx-reply>" in text or "mention" in text:
+			parser = lxml.html.etree.HTMLParser()
+			tree   = lxml.etree.fromstring(text, parser)
+			ignore = [
+				lxml.etree.tostring(matching_element)
+				for ugly_disgusting_xpath in [
+					# Match mx-reply > blockquote > second a (user ID link)
+					"//mx-reply/blockquote/a[count(preceding-sibling::*)<=1]",
+					# Match <a> tags with a mention class
+					'//a[contains(concat(" ",normalize-space(@class)," ")'
+					'," mention ")]',
+				]
+				for matching_element in tree.xpath(ugly_disgusting_xpath)
+			]
 
-        if not text.strip():
-            return []
+		if not text.strip():
+			return []
 
-        return [
-            url for el, attrib, url, pos in lxml.html.iterlinks(text)
-            if lxml.etree.tostring(el) not in ignore
-        ]
+		return [
+			url for el, attrib, url, pos in lxml.html.iterlinks(text)
+			if lxml.etree.tostring(el) not in ignore
+		]
 
-    def serialized_field(self, field: str) -> Any:
-        if field == "source":
-            source_dict = asdict(self.source) if self.source else {}
-            return json.dumps(source_dict)
-
-        return super().serialized_field(field)
+	def serialized_field(self, field: str) -> Any:
+		if field == "source":
+			source_dict = asdict(self.source) if self.source else {}
+			return json.dumps(source_dict)
+		if field == "content_history":
+			return serialize_value_for_qml(self.content_history)
+		return super().serialized_field(field)

src/backend/models/model.py

@@ -5,7 +5,7 @@ import itertools
 from contextlib import contextmanager
 from threading import RLock
 from typing import (
-    TYPE_CHECKING, Any, Dict, Iterator, List, MutableMapping, Optional, Tuple,
+	TYPE_CHECKING, Any, Dict, Iterator, List, MutableMapping, Optional, Tuple,
 )
 
 from sortedcontainers import SortedList
@@ -15,199 +15,199 @@ from ..utils import serialize_value_for_qml
 from . import SyncId
 
 if TYPE_CHECKING:
-    from .model_item import ModelItem
-    from .proxy import ModelProxy  # noqa
+	from .model_item import ModelItem
+	from .proxy import ModelProxy  # noqa
 
 
 class Model(MutableMapping):
-    """A mapping of `{ModelItem.id: ModelItem}` synced between Python & QML.
+	"""A mapping of `{ModelItem.id: ModelItem}` synced between Python & QML.
 
-    From the Python side, the model is usable like a normal dict of
-    `ModelItem` subclass objects.
-    Different types of `ModelItem` must not be mixed in the same model.
+	From the Python side, the model is usable like a normal dict of
+	`ModelItem` subclass objects.
+	Different types of `ModelItem` must not be mixed in the same model.
 
-    When items are added, replaced, removed, have field value changes, or the
-    model is cleared, corresponding `PyOtherSideEvent` are fired to inform
-    QML of the changes so that it can keep its models in sync.
+	When items are added, replaced, removed, have field value changes, or the
+	model is cleared, corresponding `PyOtherSideEvent` are fired to inform
+	QML of the changes so that it can keep its models in sync.
 
-    Items in the model are kept sorted using the `ModelItem` subclass `__lt__`.
-    """
+	Items in the model are kept sorted using the `ModelItem` subclass `__lt__`.
+	"""
 
-    instances: Dict[SyncId, "Model"]      = {}
-    proxies:   Dict[SyncId, "ModelProxy"] = {}
+	instances: Dict[SyncId, "Model"]	  = {}
+	proxies:   Dict[SyncId, "ModelProxy"] = {}
 
 
-    def __init__(self, sync_id: Optional[SyncId]) -> None:
-        self.sync_id:      Optional[SyncId]        = sync_id
-        self.write_lock:   RLock                   = RLock()
-        self._data:        Dict[Any, "ModelItem"]  = {}
-        self._sorted_data: SortedList["ModelItem"] = SortedList()
+	def __init__(self, sync_id: Optional[SyncId]) -> None:
+		self.sync_id:	  Optional[SyncId]		= sync_id
+		self.write_lock:   RLock				   = RLock()
+		self._data:		Dict[Any, "ModelItem"]  = {}
+		self._sorted_data: SortedList["ModelItem"] = SortedList()
 
-        self.take_items_ownership: bool = True
+		self.take_items_ownership: bool = True
 
-        # [(index, item.id), ...]
-        self._active_batch_removed: Optional[List[Tuple[int, Any]]] = None
+		# [(index, item.id), ...]
+		self._active_batch_removed: Optional[List[Tuple[int, Any]]] = None
 
-        if self.sync_id:
-            self.instances[self.sync_id] = self
+		if self.sync_id:
+			self.instances[self.sync_id] = self
 
 
-    def __repr__(self) -> str:
-        """Provide a full representation of the model and its content."""
+	def __repr__(self) -> str:
+		"""Provide a full representation of the model and its content."""
 
-        return "%s(sync_id=%s, %s)" % (
-            type(self).__name__, self.sync_id, self._data,
-        )
+		return "%s(sync_id=%s, %s)" % (
+			type(self).__name__, self.sync_id, self._data,
+		)
 
 
-    def __str__(self) -> str:
-        """Provide a short "<sync_id>: <num> items" representation."""
-        return f"{self.sync_id}: {len(self)} items"
+	def __str__(self) -> str:
+		"""Provide a short "<sync_id>: <num> items" representation."""
+		return f"{self.sync_id}: {len(self)} items"
 
 
-    def __getitem__(self, key):
-        return self._data[key]
+	def __getitem__(self, key):
+		return self._data[key]
 
 
-    def __setitem__(
-        self,
-        key,
-        value: "ModelItem",
-        _changed_fields: Optional[Dict[str, Any]] = None,
-    ) -> None:
-        with self.write_lock:
-            existing = self._data.get(key)
-            new      = value
+	def __setitem__(
+		self,
+		key,
+		value: "ModelItem",
+		_changed_fields: Optional[Dict[str, Any]] = None,
+	) -> None:
+		with self.write_lock:
+			existing = self._data.get(key)
+			new	  = value
 
-            # Collect changed fields
+			# Collect changed fields
 
-            changed_fields = _changed_fields or {}
+			changed_fields = _changed_fields or {}
 
-            if not changed_fields:
-                for field in new.__dataclass_fields__:  # type: ignore
-                    if field.startswith("_"):
-                        continue
+			if not changed_fields:
+				for field in new.__dataclass_fields__:  # type: ignore
+					if field.startswith("_"):
+						continue
 
-                    changed = True
+					changed = True
 
-                    if existing:
-                        changed = \
-                            getattr(new, field) != getattr(existing, field)
+					if existing:
+						changed = \
+							getattr(new, field) != getattr(existing, field)
 
-                    if changed:
-                        changed_fields[field] = new.serialized_field(field)
+					if changed:
+						changed_fields[field] = new.serialized_field(field)
 
-            # Set parent model on new item
+			# Set parent model on new item
 
-            if self.sync_id and self.take_items_ownership:
-                new.parent_model = self
+			if self.sync_id and self.take_items_ownership:
+				new.parent_model = self
 
-            # Insert into sorted data
+			# Insert into sorted data
 
-            index_then = None
+			index_then = None
 
-            if existing:
-                index_then = self._sorted_data.index(existing)
-                del self._sorted_data[index_then]
+			if existing:
+				index_then = self._sorted_data.index(existing)
+				del self._sorted_data[index_then]
 
-            self._sorted_data.add(new)
-            index_now = self._sorted_data.index(new)
+			self._sorted_data.add(new)
+			index_now = self._sorted_data.index(new)
 
-            # Insert into dict data
+			# Insert into dict data
 
-            self._data[key] = new
+			self._data[key] = new
 
-            # Callbacks
+			# Callbacks
 
-            for sync_id, proxy in self.proxies.items():
-                if sync_id != self.sync_id:
-                    proxy.source_item_set(self, key, value)
+			for sync_id, proxy in self.proxies.items():
+				if sync_id != self.sync_id:
+					proxy.source_item_set(self, key, value)
 
-            # Emit PyOtherSide event
+			# Emit PyOtherSide event
 
-            if self.sync_id and (index_then != index_now or changed_fields):
-                ModelItemSet(
-                    self.sync_id, index_then, index_now, changed_fields,
-                )
+			if self.sync_id and (index_then != index_now or changed_fields):
+				ModelItemSet(
+					self.sync_id, index_then, index_now, changed_fields,
+				)
 
 
-    def __delitem__(self, key) -> None:
-        with self.write_lock:
-            item = self._data[key]
+	def __delitem__(self, key) -> None:
+		with self.write_lock:
+			item = self._data[key]
 
-            if self.sync_id and self.take_items_ownership:
-                item.parent_model = None
+			if self.sync_id and self.take_items_ownership:
+				item.parent_model = None
 
-            del self._data[key]
+			del self._data[key]
 
-            index = self._sorted_data.index(item)
-            del self._sorted_data[index]
+			index = self._sorted_data.index(item)
+			del self._sorted_data[index]
 
-            for sync_id, proxy in self.proxies.items():
-                if sync_id != self.sync_id:
-                    proxy.source_item_deleted(self, key)
+			for sync_id, proxy in self.proxies.items():
+				if sync_id != self.sync_id:
+					proxy.source_item_deleted(self, key)
 
-            if self.sync_id:
-                if self._active_batch_removed is None:
-                    i = serialize_value_for_qml(item.id, json_list_dicts=True)
-                    ModelItemDeleted(self.sync_id, index, 1, (i,))
-                else:
-                    self._active_batch_removed.append((index, item.id))
+			if self.sync_id:
+				if self._active_batch_removed is None:
+					i = serialize_value_for_qml(item.id, json_list_dicts=True)
+					ModelItemDeleted(self.sync_id, index, 1, (i,))
+				else:
+					self._active_batch_removed.append((index, item.id))
 
 
-    def __iter__(self) -> Iterator:
-        return iter(self._data)
+	def __iter__(self) -> Iterator:
+		return iter(self._data)
 
 
-    def __len__(self) -> int:
-        return len(self._data)
+	def __len__(self) -> int:
+		return len(self._data)
 
 
-    def __lt__(self, other: "Model") -> bool:
-        """Sort `Model` objects lexically by `sync_id`."""
-        return str(self.sync_id) < str(other.sync_id)
+	def __lt__(self, other: "Model") -> bool:
+		"""Sort `Model` objects lexically by `sync_id`."""
+		return str(self.sync_id) < str(other.sync_id)
 
 
-    def clear(self) -> None:
-        super().clear()
-        if self.sync_id:
-            ModelCleared(self.sync_id)
+	def clear(self) -> None:
+		super().clear()
+		if self.sync_id:
+			ModelCleared(self.sync_id)
 
 
-    def copy(self, sync_id: Optional[SyncId] = None) -> "Model":
-        new = type(self)(sync_id=sync_id)
-        new.update(self)
-        return new
+	def copy(self, sync_id: Optional[SyncId] = None) -> "Model":
+		new = type(self)(sync_id=sync_id)
+		new.update(self)
+		return new
 
 
-    @contextmanager
-    def batch_remove(self):
-        """Context manager that accumulates item removal events.
+	@contextmanager
+	def batch_remove(self):
+		"""Context manager that accumulates item removal events.
 
-        When the context manager exits, sequences of removed items are grouped
-        and one `ModelItemDeleted` pyotherside event is fired per sequence.
-        """
+		When the context manager exits, sequences of removed items are grouped
+		and one `ModelItemDeleted` pyotherside event is fired per sequence.
+		"""
 
-        with self.write_lock:
-            try:
-                self._active_batch_removed = []
-                yield None
-            finally:
-                batch  = self._active_batch_removed
-                groups = [
-                    list(group) for item, group in
-                    itertools.groupby(batch, key=lambda x: x[0])
-                ]
+		with self.write_lock:
+			try:
+				self._active_batch_removed = []
+				yield None
+			finally:
+				batch  = self._active_batch_removed
+				groups = [
+					list(group) for item, group in
+					itertools.groupby(batch, key=lambda x: x[0])
+				]
 
-                def serialize_id(id_):
-                    return serialize_value_for_qml(id_, json_list_dicts=True)
+				def serialize_id(id_):
+					return serialize_value_for_qml(id_, json_list_dicts=True)
 
-                for group in groups:
-                    ModelItemDeleted(
-                        self.sync_id,
-                        index = group[0][0],
-                        count = len(group),
-                        ids   = [serialize_id(item[1]) for item in group],
-                    )
+				for group in groups:
+					ModelItemDeleted(
+						self.sync_id,
+						index = group[0][0],
+						count = len(group),
+						ids   = [serialize_id(item[1]) for item in group],
+					)
 
-                self._active_batch_removed = None
+				self._active_batch_removed = None

src/backend/models/model_item.py

@@ -8,122 +8,122 @@ from ..pyotherside_events import ModelItemSet
 from ..utils import serialize_value_for_qml
 
 if TYPE_CHECKING:
-    from .model import Model
+	from .model import Model
 
 
 @dataclass(eq=False)
 class ModelItem:
-    """Base class for items stored inside a `Model`.
+	"""Base class for items stored inside a `Model`.
 
-    This class must be subclassed and not used directly.
-    All subclasses must use the `@dataclass(eq=False)` decorator.
+	This class must be subclassed and not used directly.
+	All subclasses must use the `@dataclass(eq=False)` decorator.
 
-    Subclasses are also expected to implement `__lt__()`,
-    to provide support for comparisons with the `<`, `>`, `<=`, `=>` operators
-    and thus allow a `Model` to keep its data sorted.
+	Subclasses are also expected to implement `__lt__()`,
+	to provide support for comparisons with the `<`, `>`, `<=`, `=>` operators
+	and thus allow a `Model` to keep its data sorted.
 
-    Make sure to respect SortedList requirements when implementing `__lt__()`:
-    http://www.grantjenks.com/docs/sortedcontainers/introduction.html#caveats
-    """
+	Make sure to respect SortedList requirements when implementing `__lt__()`:
+	http://www.grantjenks.com/docs/sortedcontainers/introduction.html#caveats
+	"""
 
-    id: Any = field()
+	id: Any = field()
 
 
-    def __new__(cls, *_args, **_kwargs) -> "ModelItem":
-        cls.parent_model: Optional[Model] = None
-        return super().__new__(cls)
+	def __new__(cls, *_args, **_kwargs) -> "ModelItem":
+		cls.parent_model: Optional[Model] = None
+		return super().__new__(cls)
 
 
-    def __setattr__(self, name: str, value) -> None:
-        self.set_fields(**{name: value})
+	def __setattr__(self, name: str, value) -> None:
+		self.set_fields(**{name: value})
 
 
-    def __delattr__(self, name: str) -> None:
-        raise NotImplementedError()
+	def __delattr__(self, name: str) -> None:
+		raise NotImplementedError()
 
 
-    @property
-    def serialized(self) -> Dict[str, Any]:
-        """Return this item as a dict ready to be passed to QML."""
+	@property
+	def serialized(self) -> Dict[str, Any]:
+		"""Return this item as a dict ready to be passed to QML."""
 
-        return {
-            name: self.serialized_field(name)
-            for name in self.__dataclass_fields__  # type: ignore
-            if not name.startswith("_")
-        }
+		return {
+			name: self.serialized_field(name)
+			for name in self.__dataclass_fields__  # type: ignore
+			if not name.startswith("_")
+		}
 
 
-    def serialized_field(self, field: str) -> Any:
-        """Return a field's value in a form suitable for passing to QML."""
+	def serialized_field(self, field: str) -> Any:
+		"""Return a field's value in a form suitable for passing to QML."""
 
-        value = getattr(self, field)
-        return serialize_value_for_qml(value, json_list_dicts=True)
+		value = getattr(self, field)
+		return serialize_value_for_qml(value, json_list_dicts=True)
 
 
-    def set_fields(self, _force: bool = False, **fields: Any) -> None:
-        """Set one or more field's value and call `ModelItem.notify_change`.
+	def set_fields(self, _force: bool = False, **fields: Any) -> None:
+		"""Set one or more field's value and call `ModelItem.notify_change`.
 
-        For efficiency, to change multiple fields, this method should be
-        used rather than setting them one after another with `=` or `setattr`.
-        """
+		For efficiency, to change multiple fields, this method should be
+		used rather than setting them one after another with `=` or `setattr`.
+		"""
 
-        parent = self.parent_model
+		parent = self.parent_model
 
-        # If we're currently being created or haven't been put in a model yet:
-        if not parent:
-            for name, value in fields.items():
-                super().__setattr__(name, value)
-            return
+		# If we're currently being created or haven't been put in a model yet:
+		if not parent:
+			for name, value in fields.items():
+				super().__setattr__(name, value)
+			return
 
-        with parent.write_lock:
-            qml_changes = {}
-            changes     = {
-                name: value for name, value in fields.items()
-                if _force or getattr(self, name) != value
-            }
+		with parent.write_lock:
+			qml_changes = {}
+			changes	 = {
+				name: value for name, value in fields.items()
+				if _force or getattr(self, name) != value
+			}
 
-            if not changes:
-                return
+			if not changes:
+				return
 
-            # To avoid corrupting the SortedList, we have to take out the item,
-            # apply the field changes, *then* add it back in.
+			# To avoid corrupting the SortedList, we have to take out the item,
+			# apply the field changes, *then* add it back in.
 
-            index_then = parent._sorted_data.index(self)
-            del parent._sorted_data[index_then]
+			index_then = parent._sorted_data.index(self)
+			del parent._sorted_data[index_then]
 
-            for name, value in changes.items():
-                super().__setattr__(name, value)
-                is_field = name in self.__dataclass_fields__  # type: ignore
+			for name, value in changes.items():
+				super().__setattr__(name, value)
+				is_field = name in self.__dataclass_fields__  # type: ignore
 
-                if is_field and not name.startswith("_"):
-                    qml_changes[name] = self.serialized_field(name)
+				if is_field and not name.startswith("_"):
+					qml_changes[name] = self.serialized_field(name)
 
-            parent._sorted_data.add(self)
-            index_now    = parent._sorted_data.index(self)
-            index_change = index_then != index_now
+			parent._sorted_data.add(self)
+			index_now	= parent._sorted_data.index(self)
+			index_change = index_then != index_now
 
-            # Now, inform QML about changed dataclass fields if any.
+			# Now, inform QML about changed dataclass fields if any.
 
-            if not parent.sync_id or (not qml_changes and not index_change):
-                return
+			if not parent.sync_id or (not qml_changes and not index_change):
+				return
 
-            ModelItemSet(parent.sync_id, index_then, index_now, qml_changes)
+			ModelItemSet(parent.sync_id, index_then, index_now, qml_changes)
 
-        # Inform any proxy connected to the parent model of the field changes
+		# Inform any proxy connected to the parent model of the field changes
 
-        for sync_id, proxy in parent.proxies.items():
-            if sync_id != parent.sync_id:
-                proxy.source_item_set(parent, self.id, self, qml_changes)
+		for sync_id, proxy in parent.proxies.items():
+			if sync_id != parent.sync_id:
+				proxy.source_item_set(parent, self.id, self, qml_changes)
 
 
-    def notify_change(self, *fields: str) -> None:
-        """Notify the parent model that fields of this item have changed.
+	def notify_change(self, *fields: str) -> None:
+		"""Notify the parent model that fields of this item have changed.
 
-        The model cannot automatically detect changes inside
-        object fields, such as list or dicts having their data modified.
-        In these cases, this method should be called.
-        """
+		The model cannot automatically detect changes inside
+		object fields, such as list or dicts having their data modified.
+		In these cases, this method should be called.
+		"""
 
-        kwargs           = {name: getattr(self, name) for name in fields}
-        kwargs["_force"] = True
-        self.set_fields(**kwargs)
+		kwargs		   = {name: getattr(self, name) for name in fields}
+		kwargs["_force"] = True
+		self.set_fields(**kwargs)

src/backend/models/model_store.py

@@ -8,66 +8,66 @@ from typing import Dict, List, Union
 from . import SyncId
 from .model import Model
 from .special_models import (
-    AllRooms, AutoCompletedMembers, FilteredHomeservers, FilteredMembers,
-    MatchingAccounts,
+	AllRooms, AutoCompletedMembers, FilteredHomeservers, FilteredMembers,
+	MatchingAccounts,
 )
 
 
 @dataclass(frozen=True)
 class ModelStore(UserDict):
-    """Dict of sync ID keys and `Model` values.
+	"""Dict of sync ID keys and `Model` values.
 
-    The dict keys must be the sync ID of `Model` values.
-    If a non-existent key is accessed, a corresponding `Model` will be
-    created, put into the internal `data` dict and returned.
-    """
+	The dict keys must be the sync ID of `Model` values.
+	If a non-existent key is accessed, a corresponding `Model` will be
+	created, put into the internal `data` dict and returned.
+	"""
 
-    data: Dict[SyncId, Model] = field(default_factory=dict)
+	data: Dict[SyncId, Model] = field(default_factory=dict)
 
 
-    def __missing__(self, key: SyncId) -> Model:
-        """When accessing a non-existent model, create and return it.
+	def __missing__(self, key: SyncId) -> Model:
+		"""When accessing a non-existent model, create and return it.
 
-        Special models rather than a generic `Model` object may be returned
-        depending on the passed key.
-        """
+		Special models rather than a generic `Model` object may be returned
+		depending on the passed key.
+		"""
 
-        is_tuple = isinstance(key, tuple)
+		is_tuple = isinstance(key, tuple)
 
-        model: Model
+		model: Model
 
-        if key == "all_rooms":
-            model = AllRooms(self["accounts"])
-        elif key == "matching_accounts":
-            model = MatchingAccounts(self["all_rooms"])
-        elif key == "filtered_homeservers":
-            model = FilteredHomeservers()
-        elif is_tuple and len(key) == 3 and key[2] == "filtered_members":
-            model = FilteredMembers(user_id=key[0], room_id=key[1])
-        elif is_tuple and len(key) == 3 and key[2] == "autocompleted_members":
-            model = AutoCompletedMembers(user_id=key[0], room_id=key[1])
-        else:
-            model = Model(sync_id=key)
+		if key == "all_rooms":
+			model = AllRooms(self["accounts"])
+		elif key == "matching_accounts":
+			model = MatchingAccounts(self["all_rooms"])
+		elif key == "filtered_homeservers":
+			model = FilteredHomeservers()
+		elif is_tuple and len(key) == 3 and key[2] == "filtered_members":
+			model = FilteredMembers(user_id=key[0], room_id=key[1])
+		elif is_tuple and len(key) == 3 and key[2] == "autocompleted_members":
+			model = AutoCompletedMembers(user_id=key[0], room_id=key[1])
+		else:
+			model = Model(sync_id=key)
 
-        self.data[key] = model
-        return model
+		self.data[key] = model
+		return model
 
 
-    def __str__(self) -> str:
-        """Provide a nice overview of stored models when `print()` called."""
+	def __str__(self) -> str:
+		"""Provide a nice overview of stored models when `print()` called."""
 
-        return "%s(\n    %s\n)" % (
-            type(self).__name__,
-            "\n    ".join(sorted(str(v) for v in self.values())),
-        )
+		return "%s(\n	%s\n)" % (
+			type(self).__name__,
+			"\n	".join(sorted(str(v) for v in self.values())),
+		)
 
 
-    async def ensure_exists_from_qml(
-        self, sync_id: Union[SyncId, List[str]],
-    ) -> None:
-        """Create model if it doesn't exist. Should only be called by QML."""
+	async def ensure_exists_from_qml(
+		self, sync_id: Union[SyncId, List[str]],
+	) -> None:
+		"""Create model if it doesn't exist. Should only be called by QML."""
 
-        if isinstance(sync_id, list):  # QML can't pass tuples
-            sync_id = tuple(sync_id)
+		if isinstance(sync_id, list):  # QML can't pass tuples
+			sync_id = tuple(sync_id)
 
-        self[sync_id]  # will call __missing__ if needed
+		self[sync_id]  # will call __missing__ if needed

src/backend/models/proxy.py

@@ -8,68 +8,68 @@ from . import SyncId
 from .model import Model
 
 if TYPE_CHECKING:
-    from .model_item import ModelItem
+	from .model_item import ModelItem
 
 
 class ModelProxy(Model):
-    """Proxies data from one or more `Model` objects."""
+	"""Proxies data from one or more `Model` objects."""
 
-    def __init__(self, sync_id: SyncId) -> None:
-        super().__init__(sync_id)
-        self.take_items_ownership = False
-        Model.proxies[sync_id] = self
+	def __init__(self, sync_id: SyncId) -> None:
+		super().__init__(sync_id)
+		self.take_items_ownership = False
+		Model.proxies[sync_id] = self
 
-        with self.write_lock:
-            for sync_id, model in Model.instances.items():
-                if sync_id != self.sync_id and self.accept_source(model):
-                    for key, item in model.items():
-                        self.source_item_set(model, key, item)
+		with self.write_lock:
+			for sync_id, model in Model.instances.items():
+				if sync_id != self.sync_id and self.accept_source(model):
+					for key, item in model.items():
+						self.source_item_set(model, key, item)
 
 
-    def accept_source(self, source: Model) -> bool:
-        """Return whether passed `Model` should be proxied by this proxy."""
-        return True
+	def accept_source(self, source: Model) -> bool:
+		"""Return whether passed `Model` should be proxied by this proxy."""
+		return True
 
 
-    def convert_item(self, item: "ModelItem") -> "ModelItem":
-        """Take a source `ModelItem`, return an appropriate one for proxy.
+	def convert_item(self, item: "ModelItem") -> "ModelItem":
+		"""Take a source `ModelItem`, return an appropriate one for proxy.
 
-        By default, this returns the passed item unchanged.
+		By default, this returns the passed item unchanged.
 
-        Due to QML `ListModel` restrictions, if multiple source models
-        containing different subclasses of `ModelItem` are proxied,
-        they should be converted to a same `ModelItem`
-        subclass by overriding this function.
-        """
-        return copy(item)
+		Due to QML `ListModel` restrictions, if multiple source models
+		containing different subclasses of `ModelItem` are proxied,
+		they should be converted to a same `ModelItem`
+		subclass by overriding this function.
+		"""
+		return copy(item)
 
 
-    def source_item_set(
-        self,
-        source: Model,
-        key,
-        value: "ModelItem",
-        _changed_fields: Optional[Dict[str, Any]] = None,
-    ) -> None:
-        """Called when a source model item is added or changed."""
+	def source_item_set(
+		self,
+		source: Model,
+		key,
+		value: "ModelItem",
+		_changed_fields: Optional[Dict[str, Any]] = None,
+	) -> None:
+		"""Called when a source model item is added or changed."""
 
-        if self.accept_source(source):
-            value = self.convert_item(value)
-            self.__setitem__((source.sync_id, key), value, _changed_fields)
+		if self.accept_source(source):
+			value = self.convert_item(value)
+			self.__setitem__((source.sync_id, key), value, _changed_fields)
 
 
-    def source_item_deleted(self, source: Model, key) -> None:
-        """Called when a source model item is removed."""
+	def source_item_deleted(self, source: Model, key) -> None:
+		"""Called when a source model item is removed."""
 
-        if self.accept_source(source):
-            del self[source.sync_id, key]
+		if self.accept_source(source):
+			del self[source.sync_id, key]
 
 
-    def source_cleared(self, source: Model) -> None:
-        """Called when a source model is cleared."""
+	def source_cleared(self, source: Model) -> None:
+		"""Called when a source model is cleared."""
 
-        if self.accept_source(source):
-            with self.batch_remove():
-                for source_sync_id, key in self.copy():
-                    if source_sync_id == source.sync_id:
-                        del self[source_sync_id, key]
+		if self.accept_source(source):
+			with self.batch_remove():
+				for source_sync_id, key in self.copy():
+					if source_sync_id == source.sync_id:
+						del self[source_sync_id, key]

src/backend/models/special_models.py

@@ -11,143 +11,143 @@ from .model_item import ModelItem
 
 
 class AllRooms(FieldSubstringFilter):
-    """Flat filtered list of all accounts and their rooms."""
+	"""Flat filtered list of all accounts and their rooms."""
 
-    def __init__(self, accounts: Model) -> None:
-        self.accounts = accounts
-        self._collapsed: Set[str] = set()
+	def __init__(self, accounts: Model) -> None:
+		self.accounts = accounts
+		self._collapsed: Set[str] = set()
 
-        super().__init__(sync_id="all_rooms", fields=("display_name",))
-        self.items_changed_callbacks.append(self.refilter_accounts)
+		super().__init__(sync_id="all_rooms", fields=("display_name",))
+		self.items_changed_callbacks.append(self.refilter_accounts)
 
 
-    def set_account_collapse(self, user_id: str, collapsed: bool) -> None:
-        """Set whether the rooms for an account should be filtered out."""
+	def set_account_collapse(self, user_id: str, collapsed: bool) -> None:
+		"""Set whether the rooms for an account should be filtered out."""
 
-        def only_if(item):
-            return item.type is Room and item.for_account == user_id
+		def only_if(item):
+			return item.type is Room and item.for_account == user_id
 
-        if collapsed and user_id not in self._collapsed:
-            self._collapsed.add(user_id)
-            self.refilter(only_if)
+		if collapsed and user_id not in self._collapsed:
+			self._collapsed.add(user_id)
+			self.refilter(only_if)
 
-        if not collapsed and user_id in self._collapsed:
-            self._collapsed.remove(user_id)
-            self.refilter(only_if)
+		if not collapsed and user_id in self._collapsed:
+			self._collapsed.remove(user_id)
+			self.refilter(only_if)
 
 
-    def accept_source(self, source: Model) -> bool:
-        return source.sync_id == "accounts" or (
-            isinstance(source.sync_id, tuple) and
-            len(source.sync_id) == 2 and
-            source.sync_id[1] == "rooms"
-        )
+	def accept_source(self, source: Model) -> bool:
+		return source.sync_id == "accounts" or (
+			isinstance(source.sync_id, tuple) and
+			len(source.sync_id) == 2 and
+			source.sync_id[1] == "rooms"
+		)
 
 
-    def convert_item(self, item: ModelItem) -> AccountOrRoom:
-        return AccountOrRoom(
-            **asdict(item),
-            type = type(item),  # type: ignore
+	def convert_item(self, item: ModelItem) -> AccountOrRoom:
+		return AccountOrRoom(
+			**asdict(item),
+			type = type(item),  # type: ignore
 
-            account_order =
-                item.order if isinstance(item, Account) else
-                self.accounts[item.for_account].order,  # type: ignore
-        )
+			account_order =
+				item.order if isinstance(item, Account) else
+				self.accounts[item.for_account].order,  # type: ignore
+		)
 
 
-    def accept_item(self, item: ModelItem) -> bool:
-        assert isinstance(item, AccountOrRoom)  # nosec
+	def accept_item(self, item: ModelItem) -> bool:
+		assert isinstance(item, AccountOrRoom)  # nosec
 
-        if not self.filter and \
-           item.type is Room and \
-           item.for_account in self._collapsed:
-            return False
+		if not self.filter and \
+		   item.type is Room and \
+		   item.for_account in self._collapsed:
+			return False
 
-        matches_filter = super().accept_item(item)
+		matches_filter = super().accept_item(item)
 
-        if item.type is not Account or not self.filter:
-            return matches_filter
+		if item.type is not Account or not self.filter:
+			return matches_filter
 
-        return next(
-            (i for i in self.values() if i.for_account == item.id), False,
-        )
+		return next(
+			(i for i in self.values() if i.for_account == item.id), False,
+		)
 
 
-    def refilter_accounts(self) -> None:
-        self.refilter(lambda i: i.type is Account)  # type: ignore
+	def refilter_accounts(self) -> None:
+		self.refilter(lambda i: i.type is Account)  # type: ignore
 
 
 class MatchingAccounts(ModelFilter):
-    """List of our accounts in `AllRooms` with at least one matching room if
-    a `filter` is set, else list of all accounts.
-    """
+	"""List of our accounts in `AllRooms` with at least one matching room if
+	a `filter` is set, else list of all accounts.
+	"""
 
-    def __init__(self, all_rooms: AllRooms) -> None:
-        self.all_rooms = all_rooms
-        self.all_rooms.items_changed_callbacks.append(self.refilter)
+	def __init__(self, all_rooms: AllRooms) -> None:
+		self.all_rooms = all_rooms
+		self.all_rooms.items_changed_callbacks.append(self.refilter)
 
-        super().__init__(sync_id="matching_accounts")
+		super().__init__(sync_id="matching_accounts")
 
 
-    def accept_source(self, source: Model) -> bool:
-        return source.sync_id == "accounts"
+	def accept_source(self, source: Model) -> bool:
+		return source.sync_id == "accounts"
 
 
-    def accept_item(self, item: ModelItem) -> bool:
-        if not self.all_rooms.filter:
-            return True
+	def accept_item(self, item: ModelItem) -> bool:
+		if not self.all_rooms.filter:
+			return True
 
-        return next(
-            (i for i in self.all_rooms.values() if i.id == item.id),
-            False,
-        )
+		return next(
+			(i for i in self.all_rooms.values() if i.id == item.id),
+			False,
+		)
 
 
 class FilteredMembers(FieldSubstringFilter):
-    """Filtered list of members for a room."""
+	"""Filtered list of members for a room."""
 
-    def __init__(self, user_id: str, room_id: str) -> None:
-        self.user_id = user_id
-        self.room_id = room_id
-        sync_id      = (user_id, room_id, "filtered_members")
+	def __init__(self, user_id: str, room_id: str) -> None:
+		self.user_id = user_id
+		self.room_id = room_id
+		sync_id	  = (user_id, room_id, "filtered_members")
 
-        super().__init__(sync_id=sync_id, fields=("display_name",))
+		super().__init__(sync_id=sync_id, fields=("display_name",))
 
 
-    def accept_source(self, source: Model) -> bool:
-        return source.sync_id == (self.user_id, self.room_id, "members")
+	def accept_source(self, source: Model) -> bool:
+		return source.sync_id == (self.user_id, self.room_id, "members")
 
 
 class AutoCompletedMembers(FieldStringFilter):
-    """Filtered list of mentionable members for tab-completion."""
+	"""Filtered list of mentionable members for tab-completion."""
 
-    def __init__(self, user_id: str, room_id: str) -> None:
-        self.user_id = user_id
-        self.room_id = room_id
-        sync_id      = (user_id, room_id, "autocompleted_members")
+	def __init__(self, user_id: str, room_id: str) -> None:
+		self.user_id = user_id
+		self.room_id = room_id
+		sync_id	  = (user_id, room_id, "autocompleted_members")
 
-        super().__init__(
-            sync_id                    = sync_id,
-            fields                     = ("display_name", "id"),
-            no_filter_accept_all_items = False,
-        )
+		super().__init__(
+			sync_id					= sync_id,
+			fields					 = ("display_name", "id"),
+			no_filter_accept_all_items = False,
+		)
 
 
-    def accept_source(self, source: Model) -> bool:
-        return source.sync_id == (self.user_id, self.room_id, "members")
+	def accept_source(self, source: Model) -> bool:
+		return source.sync_id == (self.user_id, self.room_id, "members")
 
 
-    def match(self, fields: Dict[str, str], filtr: str) -> bool:
-        fields["id"] = fields["id"][1:]  # remove leading @
-        return super().match(fields, filtr)
+	def match(self, fields: Dict[str, str], filtr: str) -> bool:
+		fields["id"] = fields["id"][1:]  # remove leading @
+		return super().match(fields, filtr)
 
 
 class FilteredHomeservers(FieldSubstringFilter):
-    """Filtered list of public Matrix homeservers."""
+	"""Filtered list of public Matrix homeservers."""
 
-    def __init__(self) -> None:
-        super().__init__(sync_id="filtered_homeservers", fields=("id", "name"))
+	def __init__(self) -> None:
+		super().__init__(sync_id="filtered_homeservers", fields=("id", "name"))
 
 
-    def accept_source(self, source: Model) -> bool:
-        return source.sync_id == "homeservers"
+	def accept_source(self, source: Model) -> bool:
+		return source.sync_id == "homeservers"

src/backend/pcn/globals_dict.py

@@ -2,46 +2,46 @@ from collections import UserDict
 from typing import TYPE_CHECKING, Any, Dict, Iterator
 
 if TYPE_CHECKING:
-    from .section import Section
+	from .section import Section
 
 from .. import color
 
 PCN_GLOBALS: Dict[str, Any] = {
-    "color":  color.Color,
-    "hsluv":  color.hsluv,
-    "hsluva": color.hsluva,
-    "hsl":    color.hsl,
-    "hsla":   color.hsla,
-    "rgb":    color.rgb,
-    "rgba":   color.rgba,
+	"color":  color.Color,
+	"hsluv":  color.hsluv,
+	"hsluva": color.hsluva,
+	"hsl":	color.hsl,
+	"hsla":   color.hsla,
+	"rgb":	color.rgb,
+	"rgba":   color.rgba,
 }
 
 
 class GlobalsDict(UserDict):
-    def __init__(self, section: "Section") -> None:
-        super().__init__()
-        self.section = section
+	def __init__(self, section: "Section") -> None:
+		super().__init__()
+		self.section = section
 
-    @property
-    def full_dict(self) -> Dict[str, Any]:
-        return {
-            **PCN_GLOBALS,
-            **(self.section.root if self.section.root else {}),
-            **(self.section.root.globals if self.section.root else {}),
-            "self": self.section,
-            "parent": self.section.parent,
-            "root": self.section.parent,
-            **self.data,
-        }
+	@property
+	def full_dict(self) -> Dict[str, Any]:
+		return {
+			**PCN_GLOBALS,
+			**(self.section.root if self.section.root else {}),
+			**(self.section.root.globals if self.section.root else {}),
+			"self": self.section,
+			"parent": self.section.parent,
+			"root": self.section.parent,
+			**self.data,
+		}
 
-    def __getitem__(self, key: str) -> Any:
-        return self.full_dict[key]
+	def __getitem__(self, key: str) -> Any:
+		return self.full_dict[key]
 
-    def __iter__(self) -> Iterator[str]:
-        return iter(self.full_dict)
+	def __iter__(self) -> Iterator[str]:
+		return iter(self.full_dict)
 
-    def __len__(self) -> int:
-        return len(self.full_dict)
+	def __len__(self) -> int:
+		return len(self.full_dict)
 
-    def __repr__(self) -> str:
-        return repr(self.full_dict)
+	def __repr__(self) -> str:
+		return repr(self.full_dict)

src/backend/pcn/property.py

@@ -3,50 +3,50 @@ from dataclasses import dataclass, field
 from typing import TYPE_CHECKING, Any, Callable, Dict, Type
 
 if TYPE_CHECKING:
-    from .section import Section
+	from .section import Section
 
 TYPE_PROCESSORS: Dict[str, Callable[[Any], Any]] = {
-    "tuple": lambda v: tuple(v),
-    "set": lambda v: set(v),
+	"tuple": lambda v: tuple(v),
+	"set": lambda v: set(v),
 }
 
 
 class Unset:
-    pass
+	pass
 
 
 @dataclass
 class Property:
-    name:           str       = field()
-    annotation:     str       = field()
-    expression:     str       = field()
-    section:        "Section" = field()
-    value_override: Any       = Unset
+	name:		   str	   = field()
+	annotation:	 str	   = field()
+	expression:	 str	   = field()
+	section:		"Section" = field()
+	value_override: Any	   = Unset
 
-    def __get__(self, obj: "Section", objtype: Type["Section"]) -> Any:
-        if not obj:
-            return self
+	def __get__(self, obj: "Section", objtype: Type["Section"]) -> Any:
+		if not obj:
+			return self
 
-        if self.value_override is not Unset:
-            return self.value_override
+		if self.value_override is not Unset:
+			return self.value_override
 
-        env    = obj.globals
-        result = eval(self.expression, dict(env), env)  # nosec
+		env	= obj.globals
+		result = eval(self.expression, dict(env), env)  # nosec
 
-        return process_value(self.annotation, result)
+		return process_value(self.annotation, result)
 
-    def __set__(self, obj: "Section", value: Any) -> None:
-        self.value_override = value
-        obj._edited[self.name] = value
+	def __set__(self, obj: "Section", value: Any) -> None:
+		self.value_override = value
+		obj._edited[self.name] = value
 
 
 def process_value(annotation: str, value: Any) -> Any:
-    annotation = re.sub(r"\[.*\]$", "", annotation)
+	annotation = re.sub(r"\[.*\]$", "", annotation)
 
-    if annotation in TYPE_PROCESSORS:
-        return TYPE_PROCESSORS[annotation](value)
+	if annotation in TYPE_PROCESSORS:
+		return TYPE_PROCESSORS[annotation](value)
 
-    if annotation.lower() in TYPE_PROCESSORS:
-        return TYPE_PROCESSORS[annotation.lower()](value)
+	if annotation.lower() in TYPE_PROCESSORS:
+		return TYPE_PROCESSORS[annotation.lower()](value)
 
-    return value
+	return value

src/backend/pcn/section.py

@@ -7,8 +7,8 @@ from dataclasses import dataclass, field
 from operator import attrgetter
 from pathlib import Path
 from typing import (
-    Any, Callable, ClassVar, Dict, Generator, List, Optional, Set, Tuple, Type,
-    Union,
+	Any, Callable, ClassVar, Dict, Generator, List, Optional, Set, Tuple, Type,
+	Union,
 )
 
 import pyotherside
@@ -25,423 +25,423 @@ assert BUILTINS_DIR.name == "src"
 
 @dataclass(repr=False, eq=False)
 class Section(MutableMapping):
-    sections:   ClassVar[Set[str]]        = set()
-    methods:    ClassVar[Set[str]]        = set()
-    properties: ClassVar[Set[str]]        = set()
-    order:      ClassVar[Dict[str, None]] = OrderedDict()
+	sections:   ClassVar[Set[str]]		= set()
+	methods:	ClassVar[Set[str]]		= set()
+	properties: ClassVar[Set[str]]		= set()
+	order:	  ClassVar[Dict[str, None]] = OrderedDict()
 
-    source_path:   Optional[Path]      = None
-    root:          Optional["Section"] = None
-    parent:        Optional["Section"] = None
-    builtins_path: Path                = BUILTINS_DIR
-    included:      List[Path]          = field(default_factory=list)
-    globals:       GlobalsDict         = field(init=False)
+	source_path:   Optional[Path]	  = None
+	root:		  Optional["Section"] = None
+	parent:		Optional["Section"] = None
+	builtins_path: Path				= BUILTINS_DIR
+	included:	  List[Path]		  = field(default_factory=list)
+	globals:	   GlobalsDict		 = field(init=False)
 
-    _edited: Dict[str, Any] = field(init=False, default_factory=dict)
+	_edited: Dict[str, Any] = field(init=False, default_factory=dict)
 
-    def __init_subclass__(cls, **kwargs) -> None:
-        # Make these attributes not shared between Section and its subclasses
-        cls.sections   = set()
-        cls.methods    = set()
-        cls.properties = set()
-        cls.order      = OrderedDict()
+	def __init_subclass__(cls, **kwargs) -> None:
+		# Make these attributes not shared between Section and its subclasses
+		cls.sections   = set()
+		cls.methods	= set()
+		cls.properties = set()
+		cls.order	  = OrderedDict()
 
-        for parent_class in cls.__bases__:
-            if not issubclass(parent_class, Section):
-                continue
+		for parent_class in cls.__bases__:
+			if not issubclass(parent_class, Section):
+				continue
 
-            cls.sections   |= parent_class.sections  # union operator
-            cls.methods    |= parent_class.methods
-            cls.properties |= parent_class.properties
-            cls.order.update(parent_class.order)
+			cls.sections   |= parent_class.sections  # union operator
+			cls.methods	|= parent_class.methods
+			cls.properties |= parent_class.properties
+			cls.order.update(parent_class.order)
 
-        super().__init_subclass__(**kwargs)  # type: ignore
+		super().__init_subclass__(**kwargs)  # type: ignore
 
 
-    def __post_init__(self) -> None:
-        self.globals = GlobalsDict(self)
+	def __post_init__(self) -> None:
+		self.globals = GlobalsDict(self)
 
 
-    def __getattr__(self, name: str) -> Union["Section", Any]:
-        # This method signature tells mypy about the dynamic attribute types
-        # we can access. The body is run for attributes that aren't found.
+	def __getattr__(self, name: str) -> Union["Section", Any]:
+		# This method signature tells mypy about the dynamic attribute types
+		# we can access. The body is run for attributes that aren't found.
 
-        return super().__getattribute__(name)
+		return super().__getattribute__(name)
 
 
-    def __setattr__(self, name: str, value: Any) -> None:
-        # This method tells mypy about the dynamic attribute types we can set.
-        # The body is also run when setting an existing or new attribute.
+	def __setattr__(self, name: str, value: Any) -> None:
+		# This method tells mypy about the dynamic attribute types we can set.
+		# The body is also run when setting an existing or new attribute.
 
-        if name in self.__dataclass_fields__:
-            super().__setattr__(name, value)
-            return
+		if name in self.__dataclass_fields__:
+			super().__setattr__(name, value)
+			return
 
-        if name in self.properties:
-            value = process_value(getattr(type(self), name).annotation, value)
+		if name in self.properties:
+			value = process_value(getattr(type(self), name).annotation, value)
 
-            if self[name] == value:
-                return
+			if self[name] == value:
+				return
 
-            getattr(type(self), name).value_override = value
-            self._edited[name]                       = value
-            return
+			getattr(type(self), name).value_override = value
+			self._edited[name]					   = value
+			return
 
-        if name in self.sections or isinstance(value, Section):
-            raise NotImplementedError(f"cannot set section {name!r}")
+		if name in self.sections or isinstance(value, Section):
+			raise NotImplementedError(f"cannot set section {name!r}")
 
-        if name in self.methods or callable(value):
-            raise NotImplementedError(f"cannot set method {name!r}")
+		if name in self.methods or callable(value):
+			raise NotImplementedError(f"cannot set method {name!r}")
 
-        self._set_property(name, "Any", "None")
-        getattr(type(self), name).value_override = value
-        self._edited[name] = value
+		self._set_property(name, "Any", "None")
+		getattr(type(self), name).value_override = value
+		self._edited[name] = value
 
 
-    def __delattr__(self, name: str) -> None:
-        raise NotImplementedError(f"cannot delete existing attribute {name!r}")
+	def __delattr__(self, name: str) -> None:
+		raise NotImplementedError(f"cannot delete existing attribute {name!r}")
 
 
-    def __getitem__(self, key: str) -> Any:
-        try:
-            return getattr(self, key)
-        except AttributeError as err:
-            raise KeyError(str(err))
+	def __getitem__(self, key: str) -> Any:
+		try:
+			return getattr(self, key)
+		except AttributeError as err:
+			raise KeyError(str(err))
 
 
-    def __setitem__(self, key: str, value: Union["Section", str]) -> None:
-        setattr(self, key, value)
+	def __setitem__(self, key: str, value: Union["Section", str]) -> None:
+		setattr(self, key, value)
 
 
-    def __delitem__(self, key: str) -> None:
-        delattr(self, key)
+	def __delitem__(self, key: str) -> None:
+		delattr(self, key)
 
 
-    def __iter__(self) -> Generator[str, None, None]:
-        for attr_name in self.order:
-            yield attr_name
+	def __iter__(self) -> Generator[str, None, None]:
+		for attr_name in self.order:
+			yield attr_name
 
 
-    def __len__(self) -> int:
-        return len(self.order)
+	def __len__(self) -> int:
+		return len(self.order)
 
 
-    def __eq__(self, obj: Any) -> bool:
-        if not isinstance(obj, Section):
-            return False
+	def __eq__(self, obj: Any) -> bool:
+		if not isinstance(obj, Section):
+			return False
 
-        if self.globals.data != obj.globals.data or self.order != obj.order:
-            return False
+		if self.globals.data != obj.globals.data or self.order != obj.order:
+			return False
 
-        return not any(self[attr] != obj[attr] for attr in self.order)
+		return not any(self[attr] != obj[attr] for attr in self.order)
 
 
-    def __repr__(self) -> str:
-        name:     str       = type(self).__name__
-        children: List[str] = []
-        content:  str       = ""
-        newline:  bool      = False
+	def __repr__(self) -> str:
+		name:	 str	   = type(self).__name__
+		children: List[str] = []
+		content:  str	   = ""
+		newline:  bool	  = False
 
-        for attr_name in self.order:
-            value = getattr(self, attr_name)
+		for attr_name in self.order:
+			value = getattr(self, attr_name)
 
-            if attr_name in self.sections:
-                before  = "\n" if children else ""
-                newline = True
+			if attr_name in self.sections:
+				before  = "\n" if children else ""
+				newline = True
 
-                try:
-                    children.append(f"{before}{value!r},")
-                except RecursionError as err:
-                    name = type(value).__name__
-                    children.append(f"{before}{name}(\n    {err!r}\n),")
-                    pass
+				try:
+					children.append(f"{before}{value!r},")
+				except RecursionError as err:
+					name = type(value).__name__
+					children.append(f"{before}{name}(\n	{err!r}\n),")
+					pass
 
-            elif attr_name in self.methods:
-                before  = "\n" if children else ""
-                newline = True
-                children.append(f"{before}def {value.__name__}(…),")
+			elif attr_name in self.methods:
+				before  = "\n" if children else ""
+				newline = True
+				children.append(f"{before}def {value.__name__}(…),")
 
-            elif attr_name in self.properties:
-                before  = "\n" if newline else ""
-                newline = False
+			elif attr_name in self.properties:
+				before  = "\n" if newline else ""
+				newline = False
 
-                try:
-                    children.append(f"{before}{attr_name} = {value!r},")
-                except RecursionError as err:
-                    children.append(f"{before}{attr_name} = {err!r},")
+				try:
+					children.append(f"{before}{attr_name} = {value!r},")
+				except RecursionError as err:
+					children.append(f"{before}{attr_name} = {err!r},")
 
-            else:
-                newline = False
+			else:
+				newline = False
 
-        if children:
-            content = "\n%s\n" % textwrap.indent("\n".join(children), " " * 4)
+		if children:
+			content = "\n%s\n" % textwrap.indent("\n".join(children), " " * 4)
 
-        return f"{name}({content})"
+		return f"{name}({content})"
 
 
-    def children(self) -> Tuple[Tuple[str, Union["Section", Any]], ...]:
-        """Return pairs of (name, value) for child sections and properties."""
-        return tuple((name, getattr(self, name)) for name in self)
+	def children(self) -> Tuple[Tuple[str, Union["Section", Any]], ...]:
+		"""Return pairs of (name, value) for child sections and properties."""
+		return tuple((name, getattr(self, name)) for name in self)
 
 
-    @classmethod
-    def _register_set_attr(cls, name: str, add_to_set_name: str) -> None:
-        cls.methods.discard(name)
-        cls.properties.discard(name)
-        cls.sections.discard(name)
-        getattr(cls, add_to_set_name).add(name)
-        cls.order[name] = None
+	@classmethod
+	def _register_set_attr(cls, name: str, add_to_set_name: str) -> None:
+		cls.methods.discard(name)
+		cls.properties.discard(name)
+		cls.sections.discard(name)
+		getattr(cls, add_to_set_name).add(name)
+		cls.order[name] = None
 
-        for subclass in cls.__subclasses__():
-            subclass._register_set_attr(name, add_to_set_name)
+		for subclass in cls.__subclasses__():
+			subclass._register_set_attr(name, add_to_set_name)
 
 
-    def _set_section(self, section: "Section") -> None:
-        name = type(section).__name__
+	def _set_section(self, section: "Section") -> None:
+		name = type(section).__name__
 
-        if hasattr(self, name) and name not in self.order:
-            raise AttributeError(f"{name!r}: forbidden name")
+		if hasattr(self, name) and name not in self.order:
+			raise AttributeError(f"{name!r}: forbidden name")
 
-        if name in self.sections:
-            self[name].deep_merge(section)
-            return
+		if name in self.sections:
+			self[name].deep_merge(section)
+			return
 
-        self._register_set_attr(name, "sections")
-        setattr(type(self), name, section)
+		self._register_set_attr(name, "sections")
+		setattr(type(self), name, section)
 
 
-    def _set_method(self, name: str, method: Callable) -> None:
-        if hasattr(self, name) and name not in self.order:
-            raise AttributeError(f"{name!r}: forbidden name")
+	def _set_method(self, name: str, method: Callable) -> None:
+		if hasattr(self, name) and name not in self.order:
+			raise AttributeError(f"{name!r}: forbidden name")
 
-        self._register_set_attr(name, "methods")
-        setattr(type(self), name, method)
+		self._register_set_attr(name, "methods")
+		setattr(type(self), name, method)
 
 
-    def _set_property(
-        self, name: str, annotation: str, expression: str,
-    ) -> None:
-        if hasattr(self, name) and name not in self.order:
-            raise AttributeError(f"{name!r}: forbidden name")
+	def _set_property(
+		self, name: str, annotation: str, expression: str,
+	) -> None:
+		if hasattr(self, name) and name not in self.order:
+			raise AttributeError(f"{name!r}: forbidden name")
 
-        prop = Property(name, annotation, expression, self)
-        self._register_set_attr(name, "properties")
-        setattr(type(self), name, prop)
+		prop = Property(name, annotation, expression, self)
+		self._register_set_attr(name, "properties")
+		setattr(type(self), name, prop)
 
 
-    def deep_merge(self, section2: "Section") -> None:
-        self.included += section2.included
+	def deep_merge(self, section2: "Section") -> None:
+		self.included += section2.included
 
-        for key in section2:
-            if key in self.sections and key in section2.sections:
-                self.globals.data.update(section2.globals.data)
-                self[key].deep_merge(section2[key])
+		for key in section2:
+			if key in self.sections and key in section2.sections:
+				self.globals.data.update(section2.globals.data)
+				self[key].deep_merge(section2[key])
 
-            elif key in section2.sections:
-                self.globals.data.update(section2.globals.data)
-                new_type = type(key, (Section,), {})
-                instance = new_type(
-                    source_path   = self.source_path,
-                    root          = self.root or self,
-                    parent        = self,
-                    builtins_path = self.builtins_path,
-                )
-                self._set_section(instance)
-                instance.deep_merge(section2[key])
+			elif key in section2.sections:
+				self.globals.data.update(section2.globals.data)
+				new_type = type(key, (Section,), {})
+				instance = new_type(
+					source_path   = self.source_path,
+					root		  = self.root or self,
+					parent		= self,
+					builtins_path = self.builtins_path,
+				)
+				self._set_section(instance)
+				instance.deep_merge(section2[key])
 
-            elif key in section2.methods:
-                self._set_method(key, section2[key])
+			elif key in section2.methods:
+				self._set_method(key, section2[key])
 
-            else:
-                prop2 = getattr(type(section2), key)
-                self._set_property(key, prop2.annotation, prop2.expression)
+			else:
+				prop2 = getattr(type(section2), key)
+				self._set_property(key, prop2.annotation, prop2.expression)
 
 
-    def include_file(self, path: Union[Path, str]) -> None:
-        path = Path(path)
+	def include_file(self, path: Union[Path, str]) -> None:
+		path = Path(path)
 
-        if not path.is_absolute() and self.source_path:
-            path = self.source_path.parent / path
+		if not path.is_absolute() and self.source_path:
+			path = self.source_path.parent / path
 
-        with suppress(ValueError):
-            self.included.remove(path)
+		with suppress(ValueError):
+			self.included.remove(path)
 
-        self.included.append(path)
-        self.deep_merge(Section.from_file(path))
+		self.included.append(path)
+		self.deep_merge(Section.from_file(path))
 
 
-    def include_builtin(self, relative_path: Union[Path, str]) -> None:
-        path = self.builtins_path / relative_path
+	def include_builtin(self, relative_path: Union[Path, str]) -> None:
+		path = self.builtins_path / relative_path
 
-        with suppress(ValueError):
-            self.included.remove(path)
+		with suppress(ValueError):
+			self.included.remove(path)
 
-        self.included.append(path)
-        self.deep_merge(Section.from_file(path))
+		self.included.append(path)
+		self.deep_merge(Section.from_file(path))
 
 
-    def as_dict(self, _section: Optional["Section"] = None) -> Dict[str, Any]:
-        dct     = {}
-        section = self if _section is None else _section
+	def as_dict(self, _section: Optional["Section"] = None) -> Dict[str, Any]:
+		dct	 = {}
+		section = self if _section is None else _section
 
-        for key, value in section.items():
-            if isinstance(value, Section):
-                dct[key] = self.as_dict(value)
-            else:
-                dct[key] = value
+		for key, value in section.items():
+			if isinstance(value, Section):
+				dct[key] = self.as_dict(value)
+			else:
+				dct[key] = value
 
-        return dct
+		return dct
 
 
-    def edits_as_dict(
-        self, _section: Optional["Section"] = None,
-    ) -> Dict[str, Any]:
+	def edits_as_dict(
+		self, _section: Optional["Section"] = None,
+	) -> Dict[str, Any]:
 
-        warning = (
-            "This file is generated when settings are changed from the GUI, "
-            "and properties in it override the ones in the corresponding "
-            "PCN user config file. "
-            "If a property is gets changed in the PCN file, any corresponding "
-            "property override here is removed."
-        )
+		warning = (
+			"This file is generated when settings are changed from the GUI, "
+			"and properties in it override the ones in the corresponding "
+			"PCN user config file. "
+			"If a property is gets changed in the PCN file, any corresponding "
+			"property override here is removed."
+		)
 
-        if _section is None:
-            section = self
-            dct     = {"__comment": warning, "set": section._edited.copy()}
-            add_to  = dct["set"]
-        else:
-            section = _section
-            dct     = {
-                prop_name: (
-                    getattr(type(section), prop_name).expression,
-                    value_override,
-                )
-                for prop_name, value_override in section._edited.items()
-            }
-            add_to  = dct
-
-        for name in section.sections:
-            edits = section.edits_as_dict(section[name])
-
-            if edits:
-                add_to[name] = edits  # type: ignore
-
-        return dct
-
-
-    def deep_merge_edits(
-        self, edits: Dict[str, Any], has_expressions: bool = True,
-    ) -> bool:
-
-        changes = False
-
-        if not self.parent:  # this is Root
-            edits = edits.get("set", {})
-
-        for name, value in edits.copy().items():
-            if isinstance(self.get(name), Section) and isinstance(value, dict):
-                if self[name].deep_merge_edits(value, has_expressions):
-                    changes = True
+		if _section is None:
+			section = self
+			dct	 = {"__comment": warning, "set": section._edited.copy()}
+			add_to  = dct["set"]
+		else:
+			section = _section
+			dct	 = {
+				prop_name: (
+					getattr(type(section), prop_name).expression,
+					value_override,
+				)
+				for prop_name, value_override in section._edited.items()
+			}
+			add_to  = dct
+
+		for name in section.sections:
+			edits = section.edits_as_dict(section[name])
+
+			if edits:
+				add_to[name] = edits  # type: ignore
+
+		return dct
+
+
+	def deep_merge_edits(
+		self, edits: Dict[str, Any], has_expressions: bool = True,
+	) -> bool:
+
+		changes = False
+
+		if not self.parent:  # this is Root
+			edits = edits.get("set", {})
+
+		for name, value in edits.copy().items():
+			if isinstance(self.get(name), Section) and isinstance(value, dict):
+				if self[name].deep_merge_edits(value, has_expressions):
+					changes = True
 
-            elif not has_expressions:
-                self[name] = value
+			elif not has_expressions:
+				self[name] = value
 
-            elif isinstance(value, (tuple, list)):
-                user_expression, gui_value = value
+			elif isinstance(value, (tuple, list)):
+				user_expression, gui_value = value
 
-                if not hasattr(type(self), name):
-                    self[name] = gui_value
-                elif getattr(type(self), name).expression == user_expression:
-                    self[name] = gui_value
-                else:
-                    # If user changed their config file, discard the GUI edit
-                    del edits[name]
-                    changes = True
+				if not hasattr(type(self), name):
+					self[name] = gui_value
+				elif getattr(type(self), name).expression == user_expression:
+					self[name] = gui_value
+				else:
+					# If user changed their config file, discard the GUI edit
+					del edits[name]
+					changes = True
 
-        return changes
+		return changes
 
-    @property
-    def all_includes(self) -> Generator[Path, None, None]:
+	@property
+	def all_includes(self) -> Generator[Path, None, None]:
 
-        yield from self.included
+		yield from self.included
 
-        for sub in self.sections:
-            yield from self[sub].all_includes
+		for sub in self.sections:
+			yield from self[sub].all_includes
 
-    @classmethod
-    def from_source_code(
-        cls,
-        code:     str,
-        path:     Optional[Path] = None,
-        builtins: Optional[Path] = None,
-        *,
-        inherit:  Tuple[Type["Section"], ...]              = (),
-        node:     Union[None, red.RedBaron, red.ClassNode] = None,
-        name:     str                                      = "Root",
-        root:     Optional["Section"]                      = None,
-        parent:   Optional["Section"]                      = None,
-    ) -> "Section":
-
-        builtins                  = builtins or BUILTINS_DIR
-        section:  Type["Section"] = type(name, inherit or (Section,), {})
-        instance: Section         = section(path, root, parent, builtins)
-
-        node = node or red.RedBaron(code)
-
-        for child in node.node_list:
-            if isinstance(child, red.ClassNode):
-                root_arg      = instance if root is None else root
-                child_inherit = []
-
-                for name in child.inherit_from.dumps().split(","):
-                    name = name.strip()
-
-                    if name:
-                        child_inherit.append(type(attrgetter(name)(root_arg)))
-
-                instance._set_section(section.from_source_code(
-                    code     = code,
-                    path     = path,
-                    builtins = builtins,
-                    inherit  = tuple(child_inherit),
-                    node     = child,
-                    name     = child.name,
-                    root     = root_arg,
-                    parent   = instance,
-                ))
-
-            elif isinstance(child, red.AssignmentNode):
-                if isinstance(child.target, red.NameNode):
-                    name = child.target.value
-                else:
-                    name = str(child.target.to_python())
+	@classmethod
+	def from_source_code(
+		cls,
+		code:	 str,
+		path:	 Optional[Path] = None,
+		builtins: Optional[Path] = None,
+		*,
+		inherit:  Tuple[Type["Section"], ...]			  = (),
+		node:	 Union[None, red.RedBaron, red.ClassNode] = None,
+		name:	 str									  = "Root",
+		root:	 Optional["Section"]					  = None,
+		parent:   Optional["Section"]					  = None,
+	) -> "Section":
+
+		builtins				  = builtins or BUILTINS_DIR
+		section:  Type["Section"] = type(name, inherit or (Section,), {})
+		instance: Section		 = section(path, root, parent, builtins)
+
+		node = node or red.RedBaron(code)
+
+		for child in node.node_list:
+			if isinstance(child, red.ClassNode):
+				root_arg	  = instance if root is None else root
+				child_inherit = []
+
+				for name in child.inherit_from.dumps().split(","):
+					name = name.strip()
+
+					if name:
+						child_inherit.append(type(attrgetter(name)(root_arg)))
+
+				instance._set_section(section.from_source_code(
+					code	 = code,
+					path	 = path,
+					builtins = builtins,
+					inherit  = tuple(child_inherit),
+					node	 = child,
+					name	 = child.name,
+					root	 = root_arg,
+					parent   = instance,
+				))
+
+			elif isinstance(child, red.AssignmentNode):
+				if isinstance(child.target, red.NameNode):
+					name = child.target.value
+				else:
+					name = str(child.target.to_python())
 
-                instance._set_property(
-                    name,
-                    child.annotation.dumps() if child.annotation else "",
-                    child.value.dumps(),
-                )
+				instance._set_property(
+					name,
+					child.annotation.dumps() if child.annotation else "",
+					child.value.dumps(),
+				)
 
-            else:
-                env = instance.globals
-                exec(child.dumps(), dict(env), env)  # nosec
+			else:
+				env = instance.globals
+				exec(child.dumps(), dict(env), env)  # nosec
 
-                if isinstance(child, red.DefNode):
-                    instance._set_method(child.name, env[child.name])
-
-        return instance
-
-
-    @classmethod
-    def from_file(
-        cls, path: Union[str, Path], builtins: Union[str, Path] = BUILTINS_DIR,
-    ) -> "Section":
-
-        path = Path(re.sub(r"^qrc:/", "", str(path)))
-
-        try:
-            content = pyotherside.qrc_get_file_contents(str(path)).decode()
-        except ValueError:  # App was compiled without QRC
-            content = path.read_text()
-
-        return Section.from_source_code(content, path, Path(builtins))
+				if isinstance(child, red.DefNode):
+					instance._set_method(child.name, env[child.name])
+
+		return instance
+
+
+	@classmethod
+	def from_file(
+		cls, path: Union[str, Path], builtins: Union[str, Path] = BUILTINS_DIR,
+	) -> "Section":
+
+		path = Path(re.sub(r"^qrc:/", "", str(path)))
+
+		try:
+			content = pyotherside.qrc_get_file_contents(str(path)).decode()
+		except ValueError:  # App was compiled without QRC
+			content = path.read_text()
+
+		return Section.from_source_code(content, path, Path(builtins))

src/backend/presence.py

@@ -8,89 +8,89 @@ from typing import TYPE_CHECKING, Dict, Optional
 from .utils import AutoStrEnum, auto
 
 if TYPE_CHECKING:
-    from .models.items import Account, Member
+	from .models.items import Account, Member
 
 ORDER: Dict[str, int] = {
-    "online":           0,
-    "unavailable":      1,
-    "invisible":        2,
-    "offline":          3,
+	"online":		   0,
+	"unavailable":	  1,
+	"invisible":		2,
+	"offline":		  3,
 }
 
 
 @dataclass
 class Presence:
-    """Represents a single matrix user's presence fields.
+	"""Represents a single matrix user's presence fields.
 
-    These objects are stored in `Backend.presences`, indexed by user ID.
-    It must only be instanced when receiving a `PresenceEvent` or
-    registering an `Account` model item.
+	These objects are stored in `Backend.presences`, indexed by user ID.
+	It must only be instanced when receiving a `PresenceEvent` or
+	registering an `Account` model item.
 
-    When receiving a `PresenceEvent`, we get or create a `Presence` object in
-    `Backend.presences` for the targeted user. If the user is registered in any
-    room, add its `Member` model item to `members`. Finally, update every
-    `Member` presence fields inside `members`.
+	When receiving a `PresenceEvent`, we get or create a `Presence` object in
+	`Backend.presences` for the targeted user. If the user is registered in any
+	room, add its `Member` model item to `members`. Finally, update every
+	`Member` presence fields inside `members`.
 
-    When a room member is registered, we try to find a `Presence` in
-    `Backend.presences` for that user ID. If found, the `Member` item is added
-    to `members`.
+	When a room member is registered, we try to find a `Presence` in
+	`Backend.presences` for that user ID. If found, the `Member` item is added
+	to `members`.
 
-    When an Account model is registered, we create a `Presence` in
-    `Backend.presences` for the accountu's user ID whether the server supports
-    presence or not (we cannot know yet at this point),
-    and assign that `Account` to the `Presence.account` field.
+	When an Account model is registered, we create a `Presence` in
+	`Backend.presences` for the accountu's user ID whether the server supports
+	presence or not (we cannot know yet at this point),
+	and assign that `Account` to the `Presence.account` field.
 
-    Special attributes:
-        members: A `{room_id: Member}` dict for storing room members related to
-            this `Presence`. As each room has its own `Member`s objects, we
-            have to keep track of their presence fields. `Member`s are indexed
-            by room ID.
+	Special attributes:
+		members: A `{room_id: Member}` dict for storing room members related to
+			this `Presence`. As each room has its own `Member`s objects, we
+			have to keep track of their presence fields. `Member`s are indexed
+			by room ID.
 
-        account: `Account` related to this `Presence`, if any. Should be
-            assigned when client starts (`MatrixClient._start()`) and
-            cleared when client stops (`MatrixClient._start()`).
-    """
+		account: `Account` related to this `Presence`, if any. Should be
+			assigned when client starts (`MatrixClient._start()`) and
+			cleared when client stops (`MatrixClient._start()`).
+	"""
 
-    class State(AutoStrEnum):
-        offline     = auto()  # can mean offline, invisible or unknwon
-        unavailable = auto()
-        online      = auto()
-        invisible   = auto()
+	class State(AutoStrEnum):
+		offline	 = auto()  # can mean offline, invisible or unknwon
+		unavailable = auto()
+		online	  = auto()
+		invisible   = auto()
 
-        def __lt__(self, other: "Presence.State") -> bool:
-            return ORDER[self.value] < ORDER[other.value]
+		def __lt__(self, other: "Presence.State") -> bool:
+			return ORDER[self.value] < ORDER[other.value]
 
-    presence:         State    = State.offline
-    currently_active: bool     = False
-    last_active_at:   datetime = datetime.fromtimestamp(0)
-    status_msg:       str      = ""
+	presence:		 State	= State.offline
+	currently_active: bool	 = False
+	last_active_at:   datetime = datetime.fromtimestamp(0)
+	status_msg:	   str	  = ""
 
-    members: Dict[str, "Member"] = field(default_factory=dict)
-    account: Optional["Account"] = None
+	members: Dict[str, "Member"] = field(default_factory=dict)
+	account: Optional["Account"] = None
 
 
-    def update_members(self) -> None:
-        """Update presence fields of every `Member` in `members`.
+	def update_members(self) -> None:
+		"""Update presence fields of every `Member` in `members`.
 
-        Currently it is only called when receiving a `PresenceEvent` and when
-        registering room members.
-        """
+		Currently it is only called when receiving a `PresenceEvent` and when
+		registering room members.
+		"""
 
-        for member in self.members.values():
-            member.set_fields(
-                presence         = self.presence,
-                status_msg       = self.status_msg,
-                last_active_at   = self.last_active_at,
-                currently_active = self.currently_active,
-            )
+		for member in self.members.values():
+			member.set_fields(
+				presence		 = self.presence,
+				status_msg	   = self.status_msg,
+				last_active_at   = self.last_active_at,
+				currently_active = self.currently_active,
+			)
 
-    def update_account(self) -> None:
-        """Update presence fields of `Account` related to this `Presence`."""
+	def update_account(self) -> None:
+		"""Update presence fields of `Account` related to this `Presence`."""
 
-        if self.account:
-            self.account.set_fields(
-                presence         = self.presence,
-                status_msg       = self.status_msg,
-                last_active_at   = self.last_active_at,
-                currently_active = self.currently_active,
-            )
+		if self.account:
+			self.account.set_fields(
+				presence		 = self.presence,
+				status_msg	   = self.status_msg,
+				last_active_at   = self.last_active_at,
+				currently_active = self.currently_active,
+			)

src/backend/pyotherside_events.py

@@ -10,117 +10,117 @@ import pyotherside
 from .utils import serialize_value_for_qml
 
 if TYPE_CHECKING:
-    from .models import SyncId
-    from .user_files import UserFile
+	from .models import SyncId
+	from .user_files import UserFile
 
 
 @dataclass
 class PyOtherSideEvent:
-    """Event that will be sent on instanciation to QML by PyOtherSide."""
+	"""Event that will be sent on instanciation to QML by PyOtherSide."""
 
-    def __post_init__(self) -> None:
-        # XXX: CPython 3.6 or any Python implemention >= 3.7 is required for
-        # correct __dataclass_fields__ dict order.
-        args = [
-            serialize_value_for_qml(getattr(self, field))
-            for field in self.__dataclass_fields__  # type: ignore
-            if field != "callbacks"
-        ]
-        pyotherside.send(type(self).__name__, *args)
+	def __post_init__(self) -> None:
+		# XXX: CPython 3.6 or any Python implemention >= 3.7 is required for
+		# correct __dataclass_fields__ dict order.
+		args = [
+			serialize_value_for_qml(getattr(self, field))
+			for field in self.__dataclass_fields__  # type: ignore
+			if field != "callbacks"
+		]
+		pyotherside.send(type(self).__name__, *args)
 
 
 @dataclass
 class NotificationRequested(PyOtherSideEvent):
-    """Request a notification bubble, sound or window urgency hint.
+	"""Request a notification bubble, sound or window urgency hint.
 
-    Urgency hints usually flash or highlight the program's icon in a taskbar,
-    dock or panel.
-    """
+	Urgency hints usually flash or highlight the program's icon in a taskbar,
+	dock or panel.
+	"""
 
-    id:           str  = field()
-    critical:     bool = False
-    bubble:       bool = False
-    sound:        bool = False
-    urgency_hint: bool = False
+	id:		   str  = field()
+	critical:	 bool = False
+	bubble:	   bool = False
+	sound:		bool = False
+	urgency_hint: bool = False
 
-    # Bubble parameters
-    title: str              = ""
-    body:  str              = ""
-    image: Union[Path, str] = ""
+	# Bubble parameters
+	title: str			  = ""
+	body:  str			  = ""
+	image: Union[Path, str] = ""
 
 
 @dataclass
 class CoroutineDone(PyOtherSideEvent):
-    """Indicate that an asyncio coroutine finished."""
+	"""Indicate that an asyncio coroutine finished."""
 
-    uuid:      str                 = field()
-    result:    Any                 = None
-    exception: Optional[Exception] = None
-    traceback: Optional[str]       = None
+	uuid:	  str				 = field()
+	result:	Any				 = None
+	exception: Optional[Exception] = None
+	traceback: Optional[str]	   = None
 
 
 @dataclass
 class LoopException(PyOtherSideEvent):
-    """Indicate an uncaught exception occurance in the asyncio loop."""
+	"""Indicate an uncaught exception occurance in the asyncio loop."""
 
-    message:   str                 = field()
-    exception: Optional[Exception] = field()
-    traceback: Optional[str]       = None
+	message:   str				 = field()
+	exception: Optional[Exception] = field()
+	traceback: Optional[str]	   = None
 
 
 @dataclass
 class Pre070SettingsDetected(PyOtherSideEvent):
-    """Warn that a pre-0.7.0 settings.json file exists."""
-    path: Path = field()
+	"""Warn that a pre-0.7.0 settings.json file exists."""
+	path: Path = field()
 
 
 @dataclass
 class UserFileChanged(PyOtherSideEvent):
-    """Indicate that a config or data file changed on disk."""
+	"""Indicate that a config or data file changed on disk."""
 
-    type:     Type["UserFile"] = field()
-    new_data: Any              = field()
+	type:	 Type["UserFile"] = field()
+	new_data: Any			  = field()
 
 
 @dataclass
 class ModelEvent(PyOtherSideEvent):
-    """Base class for model change events."""
+	"""Base class for model change events."""
 
-    sync_id: "SyncId" = field()
+	sync_id: "SyncId" = field()
 
 
 @dataclass
 class ModelItemSet(ModelEvent):
-    """Indicate `ModelItem` insert or field changes in a `Backend` `Model`."""
+	"""Indicate `ModelItem` insert or field changes in a `Backend` `Model`."""
 
-    index_then: Optional[int]  = field()
-    index_now:  int            = field()
-    fields:     Dict[str, Any] = field()
+	index_then: Optional[int]  = field()
+	index_now:  int			= field()
+	fields:	 Dict[str, Any] = field()
 
 
 @dataclass
 class ModelItemDeleted(ModelEvent):
-    """Indicate the removal of a `ModelItem` from a `Backend` `Model`."""
+	"""Indicate the removal of a `ModelItem` from a `Backend` `Model`."""
 
-    index: int           = field()
-    count: int           = 1
-    ids:   Sequence[Any] = ()
+	index: int		   = field()
+	count: int		   = 1
+	ids:   Sequence[Any] = ()
 
 
 @dataclass
 class ModelCleared(ModelEvent):
-    """Indicate that a `Backend` `Model` was cleared."""
+	"""Indicate that a `Backend` `Model` was cleared."""
 
 
 @dataclass
 class DevicesUpdated(PyOtherSideEvent):
-    """Indicate changes in devices for us or users we share a room with."""
+	"""Indicate changes in devices for us or users we share a room with."""
 
-    our_user_id: str = field()
+	our_user_id: str = field()
 
 
 @dataclass
 class InvalidAccessToken(PyOtherSideEvent):
-    """Indicate one of our account's access token is invalid or revoked."""
+	"""Indicate one of our account's access token is invalid or revoked."""
 
-    user_id: str = field()
+	user_id: str = field()

src/backend/qml_bridge.py

@@ -29,143 +29,143 @@ from .pyotherside_events import CoroutineDone, LoopException
 
 
 class QMLBridge:
-    """Setup asyncio and provide methods to call coroutines from QML.
+	"""Setup asyncio and provide methods to call coroutines from QML.
 
-    A thread is created to run the asyncio loop in, to ensure all calls from
-    QML return instantly.
-    Synchronous methods are provided for QML to call coroutines using
-    PyOtherSide, which doesn't have this ability out of the box.
+	A thread is created to run the asyncio loop in, to ensure all calls from
+	QML return instantly.
+	Synchronous methods are provided for QML to call coroutines using
+	PyOtherSide, which doesn't have this ability out of the box.
 
-    Attributes:
-        backend: The `backend.Backend` object containing general coroutines
-            for QML and that manages `MatrixClient` objects.
-    """
+	Attributes:
+		backend: The `backend.Backend` object containing general coroutines
+			for QML and that manages `MatrixClient` objects.
+	"""
 
-    def __init__(self) -> None:
-        try:
-            self._loop = asyncio.get_event_loop()
-        except RuntimeError:
-            self._loop = asyncio.new_event_loop()
-            asyncio.set_event_loop(self._loop)
-        self._loop.set_exception_handler(self._loop_exception_handler)
+	def __init__(self) -> None:
+		try:
+			self._loop = asyncio.get_event_loop()
+		except RuntimeError:
+			self._loop = asyncio.new_event_loop()
+			asyncio.set_event_loop(self._loop)
+		self._loop.set_exception_handler(self._loop_exception_handler)
 
-        from .backend import Backend
-        self.backend: Backend = Backend()
+		from .backend import Backend
+		self.backend: Backend = Backend()
 
-        self._running_futures: Dict[str, Future] = {}
-        self._cancelled_early: Set[str]          = set()
+		self._running_futures: Dict[str, Future] = {}
+		self._cancelled_early: Set[str]		  = set()
 
-        Thread(target=self._start_asyncio_loop).start()
+		Thread(target=self._start_asyncio_loop).start()
 
 
-    def _loop_exception_handler(
-        self, loop: asyncio.AbstractEventLoop, context: dict,
-    ) -> None:
-        if "exception" in context:
-            err   = context["exception"]
-            trace = "".join(
-                traceback.format_exception(type(err), err, err.__traceback__),
-            )
-            LoopException(context["message"], err, trace)
+	def _loop_exception_handler(
+		self, loop: asyncio.AbstractEventLoop, context: dict,
+	) -> None:
+		if "exception" in context:
+			err   = context["exception"]
+			trace = "".join(
+				traceback.format_exception(type(err), err, err.__traceback__),
+			)
+			LoopException(context["message"], err, trace)
 
-        loop.default_exception_handler(context)
+		loop.default_exception_handler(context)
 
 
-    def _start_asyncio_loop(self) -> None:
-        asyncio.set_event_loop(self._loop)
-        self._loop.run_forever()
+	def _start_asyncio_loop(self) -> None:
+		asyncio.set_event_loop(self._loop)
+		self._loop.run_forever()
 
 
-    def _call_coro(self, coro: Coroutine, uuid: str) -> None:
-        """Schedule a coroutine to run in our thread and return a `Future`."""
+	def _call_coro(self, coro: Coroutine, uuid: str) -> None:
+		"""Schedule a coroutine to run in our thread and return a `Future`."""
 
-        if uuid in self._cancelled_early:
-            self._cancelled_early.remove(uuid)
-            return
+		if uuid in self._cancelled_early:
+			self._cancelled_early.remove(uuid)
+			return
 
-        def on_done(future: Future) -> None:
-            """Send a PyOtherSide event with the coro's result/exception."""
-            result = exception = trace = None
+		def on_done(future: Future) -> None:
+			"""Send a PyOtherSide event with the coro's result/exception."""
+			result = exception = trace = None
 
-            try:
-                result = future.result()
-            except Exception as err:  # noqa
-                exception = err
-                trace     = traceback.format_exc().rstrip()
+			try:
+				result = future.result()
+			except Exception as err:  # noqa
+				exception = err
+				trace	 = traceback.format_exc().rstrip()
 
-            CoroutineDone(uuid, result, exception, trace)
-            del self._running_futures[uuid]
+			CoroutineDone(uuid, result, exception, trace)
+			del self._running_futures[uuid]
 
-        future = asyncio.run_coroutine_threadsafe(coro, self._loop)
-        self._running_futures[uuid] = future
-        future.add_done_callback(on_done)
+		future = asyncio.run_coroutine_threadsafe(coro, self._loop)
+		self._running_futures[uuid] = future
+		future.add_done_callback(on_done)
 
 
-    def call_backend_coro(
-        self, name: str, uuid: str, args: Sequence[str] = (),
-    ) -> None:
-        """Schedule a coroutine from the `QMLBridge.backend` object."""
+	def call_backend_coro(
+		self, name: str, uuid: str, args: Sequence[str] = (),
+	) -> None:
+		"""Schedule a coroutine from the `QMLBridge.backend` object."""
 
-        if uuid in self._cancelled_early:
-            self._cancelled_early.remove(uuid)
-        else:
-            self._call_coro(attrgetter(name)(self.backend)(*args), uuid)
+		if uuid in self._cancelled_early:
+			self._cancelled_early.remove(uuid)
+		else:
+			self._call_coro(attrgetter(name)(self.backend)(*args), uuid)
 
 
-    def call_client_coro(
-        self, user_id: str, name: str, uuid: str, args: Sequence[str] = (),
-    ) -> None:
-        """Schedule a coroutine from a `QMLBridge.backend.clients` client."""
+	def call_client_coro(
+		self, user_id: str, name: str, uuid: str, args: Sequence[str] = (),
+	) -> None:
+		"""Schedule a coroutine from a `QMLBridge.backend.clients` client."""
 
-        if uuid in self._cancelled_early:
-            self._cancelled_early.remove(uuid)
-        else:
-            client = self.backend.clients[user_id]
-            self._call_coro(attrgetter(name)(client)(*args), uuid)
+		if uuid in self._cancelled_early:
+			self._cancelled_early.remove(uuid)
+		else:
+			client = self.backend.clients[user_id]
+			self._call_coro(attrgetter(name)(client)(*args), uuid)
 
 
-    def cancel_coro(self, uuid: str) -> None:
-        """Cancel a couroutine scheduled by the `QMLBridge` methods."""
+	def cancel_coro(self, uuid: str) -> None:
+		"""Cancel a couroutine scheduled by the `QMLBridge` methods."""
 
-        if uuid in self._running_futures:
-            self._running_futures[uuid].cancel()
-        else:
-            self._cancelled_early.add(uuid)
+		if uuid in self._running_futures:
+			self._running_futures[uuid].cancel()
+		else:
+			self._cancelled_early.add(uuid)
 
 
-    def pdb(self, extra_data: Sequence = (), remote: bool = False) -> None:
-        """Call the python debugger, defining some conveniance variables."""
+	def pdb(self, extra_data: Sequence = (), remote: bool = False) -> None:
+		"""Call the python debugger, defining some conveniance variables."""
 
-        ad  = extra_data                   # noqa
-        ba  = self.backend                 # noqa
-        mo  = self.backend.models          # noqa
-        cl  = self.backend.clients
-        gcl = lambda user: cl[f"@{user}"]  # noqa
+		ad  = extra_data				   # noqa
+		ba  = self.backend				 # noqa
+		mo  = self.backend.models		  # noqa
+		cl  = self.backend.clients
+		gcl = lambda user: cl[f"@{user}"]  # noqa
 
-        rc = lambda c: asyncio.run_coroutine_threadsafe(c, self._loop)  # noqa
+		rc = lambda c: asyncio.run_coroutine_threadsafe(c, self._loop)  # noqa
 
-        try:
-            from devtools import debug  # noqa
-            d = debug  # noqa
-        except ModuleNotFoundError:
-            log.warning("Module python-devtools not found, can't use debug()")
+		try:
+			from devtools import debug  # noqa
+			d = debug  # noqa
+		except ModuleNotFoundError:
+			log.warning("Module python-devtools not found, can't use debug()")
 
-        if remote:
-            # Run `socat readline tcp:127.0.0.1:4444` in a terminal to connect
-            import remote_pdb
-            remote_pdb.RemotePdb("127.0.0.1", 4444).set_trace()
-        else:
-            import pdb
-            pdb.set_trace()
+		if remote:
+			# Run `socat readline tcp:127.0.0.1:4444` in a terminal to connect
+			import remote_pdb
+			remote_pdb.RemotePdb("127.0.0.1", 4444).set_trace()
+		else:
+			import pdb
+			pdb.set_trace()
 
 
-    def exit(self) -> None:
-        try:
-            asyncio.run_coroutine_threadsafe(
-                self.backend.terminate_clients(), self._loop,
-            ).result()
-        except Exception as e:  # noqa
-            print(e)
+	def exit(self) -> None:
+		try:
+			asyncio.run_coroutine_threadsafe(
+				self.backend.terminate_clients(), self._loop,
+			).result()
+		except Exception as e:  # noqa
+			print(e)
 
 
 # The AppImage AppRun script overwrites some environment path variables to
@@ -174,8 +174,8 @@ class QMLBridge:
 # to prevent problems like QML Qt.openUrlExternally() failing because
 # the external launched program is affected by our AppImage-specific variables.
 for var in ("LD_LIBRARY_PATH", "PYTHONHOME", "PYTHONUSERBASE"):
-    if f"RESTORE_{var}" in os.environ:
-        os.environ[var] = os.environ[f"RESTORE_{var}"]
+	if f"RESTORE_{var}" in os.environ:
+		os.environ[var] = os.environ[f"RESTORE_{var}"]
 
 
 BRIDGE = QMLBridge()

src/backend/sso_server.py

@@ -9,99 +9,99 @@ from . import __display_name__
 
 _SUCCESS_HTML_PAGE = """<!DOCTYPE html>
 <html>
-    <head>
-        <title>""" + __display_name__ + """</title>
-        <meta charset="utf-8">
-        <style>
-            body { background: hsl(0, 0%, 90%); }
+	<head>
+		<title>""" + __display_name__ + """</title>
+		<meta charset="utf-8">
+		<style>
+			body { background: hsl(0, 0%, 90%); }
 
-            @keyframes appear {
-                0% { transform: scale(0); }
-                45% { transform: scale(0); }
-                80% { transform: scale(1.6); }
-                100% { transform: scale(1); }
-            }
+			@keyframes appear {
+				0% { transform: scale(0); }
+				45% { transform: scale(0); }
+				80% { transform: scale(1.6); }
+				100% { transform: scale(1); }
+			}
 
-            .circle {
-                width: 90px;
-                height: 90px;
-                position: absolute;
-                top: 50%;
-                left: 50%;
-                margin: -45px 0 0 -45px;
-                border-radius: 50%;
-                font-size: 60px;
-                line-height: 90px;
-                text-align: center;
-                background: hsl(203, 51%, 15%);
-                color: hsl(162, 56%, 42%, 1);
-                animation: appear 0.4s linear;
-            }
-        </style>
-    </head>
+			.circle {
+				width: 90px;
+				height: 90px;
+				position: absolute;
+				top: 50%;
+				left: 50%;
+				margin: -45px 0 0 -45px;
+				border-radius: 50%;
+				font-size: 60px;
+				line-height: 90px;
+				text-align: center;
+				background: hsl(203, 51%, 15%);
+				color: hsl(162, 56%, 42%, 1);
+				animation: appear 0.4s linear;
+			}
+		</style>
+	</head>
 
-    <body><div class="circle">✓</div></body>
+	<body><div class="circle">✓</div></body>
 </html>"""
 
 
 class _SSORequestHandler(BaseHTTPRequestHandler):
-    def do_GET(self) -> None:
-        self.server: "SSOServer"
+	def do_GET(self) -> None:
+		self.server: "SSOServer"
 
-        redirect = "%s/_matrix/client/r0/login/sso/redirect?redirectUrl=%s" % (
-            self.server.for_homeserver,
-            quote(self.server.url_to_open),
-        )
+		redirect = "%s/_matrix/client/r0/login/sso/redirect?redirectUrl=%s" % (
+			self.server.for_homeserver,
+			quote(self.server.url_to_open),
+		)
 
-        parameters = parse_qs(urlparse(self.path).query)
+		parameters = parse_qs(urlparse(self.path).query)
 
-        if "loginToken" in parameters:
-            self.server._token = parameters["loginToken"][0]
-            self.send_response(200)  # OK
-            self.send_header("Content-type", "text/html")
-            self.end_headers()
-            self.wfile.write(_SUCCESS_HTML_PAGE.encode())
-        else:
-            self.send_response(308)  # Permanent redirect, same method only
-            self.send_header("Location", redirect)
-            self.end_headers()
+		if "loginToken" in parameters:
+			self.server._token = parameters["loginToken"][0]
+			self.send_response(200)  # OK
+			self.send_header("Content-type", "text/html")
+			self.end_headers()
+			self.wfile.write(_SUCCESS_HTML_PAGE.encode())
+		else:
+			self.send_response(308)  # Permanent redirect, same method only
+			self.send_header("Location", redirect)
+			self.end_headers()
 
-        self.close_connection = True
+		self.close_connection = True
 
 
 class SSOServer(HTTPServer):
-    """Local HTTP server to retrieve a SSO login token.
+	"""Local HTTP server to retrieve a SSO login token.
 
-    Call `SSOServer.wait_for_token()` in a background task to start waiting
-    for a SSO login token from the Matrix homeserver.
+	Call `SSOServer.wait_for_token()` in a background task to start waiting
+	for a SSO login token from the Matrix homeserver.
 
-    Once the task is running, the user must open `SSOServer.url_to_open` in
-    their browser, where they will be able to complete the login process.
-    Once they are done, the homeserver will call us back with a login token
-    and the `SSOServer.wait_for_token()` task will return.
-    """
+	Once the task is running, the user must open `SSOServer.url_to_open` in
+	their browser, where they will be able to complete the login process.
+	Once they are done, the homeserver will call us back with a login token
+	and the `SSOServer.wait_for_token()` task will return.
+	"""
 
-    def __init__(self, for_homeserver: str) -> None:
-        self.for_homeserver: str = for_homeserver
-        self._token:         str = ""
+	def __init__(self, for_homeserver: str) -> None:
+		self.for_homeserver: str = for_homeserver
+		self._token:		 str = ""
 
-        # Pick the first available port
-        super().__init__(("127.0.0.1", 0), _SSORequestHandler)
+		# Pick the first available port
+		super().__init__(("127.0.0.1", 0), _SSORequestHandler)
 
 
-    @property
-    def url_to_open(self) -> str:
-        """URL for the user to open in their browser, to do the SSO process."""
+	@property
+	def url_to_open(self) -> str:
+		"""URL for the user to open in their browser, to do the SSO process."""
 
-        return f"http://{self.server_address[0]}:{self.server_port}"
+		return f"http://{self.server_address[0]}:{self.server_port}"
 
 
-    async def wait_for_token(self) -> str:
-        """Wait until the homeserver gives us a login token and return it."""
+	async def wait_for_token(self) -> str:
+		"""Wait until the homeserver gives us a login token and return it."""
 
-        loop = asyncio.get_event_loop()
+		loop = asyncio.get_event_loop()
 
-        while not self._token:
-            await loop.run_in_executor(None, self.handle_request)
+		while not self._token:
+			await loop.run_in_executor(None, self.handle_request)
 
-        return self._token
+		return self._token

src/backend/theme_parser.py

@@ -11,77 +11,77 @@ import re
 from typing import Generator
 
 PROPERTY_TYPES = {"bool", "double", "int", "list", "real", "string", "url",
-                  "var", "date", "point", "rect", "size", "color"}
+				  "var", "date", "point", "rect", "size", "color"}
 
 
 def _add_property(line: str) -> str:
-    """Return a QML property declaration line from a QPL property line."""
+	"""Return a QML property declaration line from a QPL property line."""
 
-    if re.match(r"^\s*[a-zA-Z\d_]+\s*:$", line):
-        return re.sub(r"^(\s*)(\S*\s*):$",
-                      r"\1readonly property QtObject \2: QtObject",
-                      line)
+	if re.match(r"^\s*[a-zA-Z\d_]+\s*:$", line):
+		return re.sub(r"^(\s*)(\S*\s*):$",
+					  r"\1readonly property QtObject \2: QtObject",
+					  line)
 
-    types = "|".join(PROPERTY_TYPES)
-    if re.match(fr"^\s*({types}) [a-zA-Z\d_]+\s*:", line):
-        return re.sub(r"^(\s*)(\S*)", r"\1property \2", line)
+	types = "|".join(PROPERTY_TYPES)
+	if re.match(fr"^\s*({types}) [a-zA-Z\d_]+\s*:", line):
+		return re.sub(r"^(\s*)(\S*)", r"\1property \2", line)
 
-    return line
+	return line
 
 
 def _process_lines(content: str) -> Generator[str, None, None]:
-    """Yield lines of real QML from lines of QPL."""
+	"""Yield lines of real QML from lines of QPL."""
 
-    skip           = False
-    indent         = " " * 4
-    current_indent = 0
+	skip		   = False
+	indent		 = " " * 4
+	current_indent = 0
 
-    for line in content.split("\n"):
-        line = line.rstrip()
+	for line in content.split("\n"):
+		line = line.rstrip()
 
-        if not line.strip() or line.strip().startswith("//"):
-            continue
+		if not line.strip() or line.strip().startswith("//"):
+			continue
 
-        start_space_list = re.findall(r"^ +", line)
-        start_space      = start_space_list[0] if start_space_list else ""
+		start_space_list = re.findall(r"^ +", line)
+		start_space	  = start_space_list[0] if start_space_list else ""
 
-        line_indents = len(re.findall(indent, start_space))
+		line_indents = len(re.findall(indent, start_space))
 
-        if not skip:
-            if line_indents > current_indent:
-                yield "%s{" % (indent * current_indent)
-                current_indent = line_indents
+		if not skip:
+			if line_indents > current_indent:
+				yield "%s{" % (indent * current_indent)
+				current_indent = line_indents
 
-            while line_indents < current_indent:
-                current_indent -= 1
-                yield "%s}" % (indent * current_indent)
+			while line_indents < current_indent:
+				current_indent -= 1
+				yield "%s}" % (indent * current_indent)
 
-            line = _add_property(line)
+			line = _add_property(line)
 
-        yield line
+		yield line
 
-        skip = any((line.endswith(e) for e in "([{+\\,?:"))
+		skip = any((line.endswith(e) for e in "([{+\\,?:"))
 
-    while current_indent:
-        current_indent -= 1
-        yield "%s}" % (indent * current_indent)
+	while current_indent:
+		current_indent -= 1
+		yield "%s}" % (indent * current_indent)
 
 
 def convert_to_qml(theme_content: str) -> str:
-    """Return valid QML code with imports from QPL content."""
+	"""Return valid QML code with imports from QPL content."""
 
-    theme_content = theme_content.replace("\t", "    ")
+	theme_content = theme_content.replace("\t", "	")
 
-    lines  = [
-        "import QtQuick 2.12",
-        'import "../Base"',
-        "QtObject {",
-        "    function hsluv(h, s, l, a) { return utils.hsluv(h, s, l, a) }",
-        "    function hsl(h, s, l)      { return utils.hsl(h, s, l) }",
-        "    function hsla(h, s, l, a)  { return utils.hsla(h, s, l, a) }",
-        "    id: theme",
-    ]
-    lines += [f"    {line}" for line in _process_lines(theme_content)]
-    lines += ["}"]
+	lines  = [
+		"import QtQuick 2.12",
+		'import "../Base"',
+		"QtObject {",
+		"	function hsluv(h, s, l, a) { return utils.hsluv(h, s, l, a) }",
+		"	function hsl(h, s, l)	  { return utils.hsl(h, s, l) }",
+		"	function hsla(h, s, l, a)  { return utils.hsla(h, s, l, a) }",
+		"	id: theme",
+	]
+	lines += [f"	{line}" for line in _process_lines(theme_content)]
+	lines += ["}"]
 
-    return "\n".join(lines)
+	return "\n".join(lines)

src/backend/user_files.py

@@ -12,7 +12,7 @@ from collections.abc import MutableMapping
 from dataclasses import dataclass, field
 from pathlib import Path
 from typing import (
-    TYPE_CHECKING, Any, ClassVar, Dict, Iterator, Optional, Tuple,
+	TYPE_CHECKING, Any, ClassVar, Dict, Iterator, Optional, Tuple,
 )
 
 import pyotherside
@@ -20,521 +20,521 @@ from watchgod import Change, awatch
 
 from .pcn.section import Section
 from .pyotherside_events import (
-    LoopException, Pre070SettingsDetected, UserFileChanged,
+	LoopException, Pre070SettingsDetected, UserFileChanged,
 )
 from .theme_parser import convert_to_qml
 from .utils import (
-    aiopen, atomic_write, deep_serialize_for_qml, dict_update_recursive,
-    flatten_dict_keys,
+	aiopen, atomic_write, deep_serialize_for_qml, dict_update_recursive,
+	flatten_dict_keys,
 )
 
 if TYPE_CHECKING:
-    from .backend import Backend
+	from .backend import Backend
 
 
 @dataclass
 class UserFile:
-    """Base class representing a user config or data file."""
+	"""Base class representing a user config or data file."""
 
-    create_missing: ClassVar[bool] = True
+	create_missing: ClassVar[bool] = True
 
-    backend:  "Backend"              = field(repr=False)
-    filename: str                    = field()
-    parent:   Optional["UserFile"]   = None
-    children: Dict[Path, "UserFile"] = field(default_factory=dict)
+	backend:  "Backend"			  = field(repr=False)
+	filename: str					= field()
+	parent:   Optional["UserFile"]   = None
+	children: Dict[Path, "UserFile"] = field(default_factory=dict)
 
-    data:        Any             = field(init=False, default_factory=dict)
-    _need_write: bool            = field(init=False, default=False)
-    _mtime:      Optional[float] = field(init=False, default=None)
+	data:		Any			 = field(init=False, default_factory=dict)
+	_need_write: bool			= field(init=False, default=False)
+	_mtime:	  Optional[float] = field(init=False, default=None)
 
-    _reader:     Optional[asyncio.Future] = field(init=False, default=None)
-    _writer:     Optional[asyncio.Future] = field(init=False, default=None)
+	_reader:	 Optional[asyncio.Future] = field(init=False, default=None)
+	_writer:	 Optional[asyncio.Future] = field(init=False, default=None)
 
-    def __post_init__(self) -> None:
-        self.data        = self.default_data
-        self._need_write = self.create_missing
+	def __post_init__(self) -> None:
+		self.data		= self.default_data
+		self._need_write = self.create_missing
 
-        if self.path.exists():
-            try:
-                text                        = self.path.read_text()
-                self.data, self._need_write = self.deserialized(text)
-            except Exception as err:  # noqa
-                LoopException(str(err), err, traceback.format_exc().rstrip())
+		if self.path.exists():
+			try:
+				text						= self.path.read_text()
+				self.data, self._need_write = self.deserialized(text)
+			except Exception as err:  # noqa
+				LoopException(str(err), err, traceback.format_exc().rstrip())
 
-        self._reader = asyncio.ensure_future(self._start_reader())
-        self._writer = asyncio.ensure_future(self._start_writer())
+		self._reader = asyncio.ensure_future(self._start_reader())
+		self._writer = asyncio.ensure_future(self._start_writer())
 
-    @property
-    def path(self) -> Path:
-        """Full path of the file to read, can exist or not exist."""
-        raise NotImplementedError()
+	@property
+	def path(self) -> Path:
+		"""Full path of the file to read, can exist or not exist."""
+		raise NotImplementedError()
 
-    @property
-    def write_path(self) -> Path:
-        """Full path of the file to write, can exist or not exist."""
-        return self.path
+	@property
+	def write_path(self) -> Path:
+		"""Full path of the file to write, can exist or not exist."""
+		return self.path
 
-    @property
-    def default_data(self) -> Any:
-        """Default deserialized content to use if the file doesn't exist."""
-        raise NotImplementedError()
+	@property
+	def default_data(self) -> Any:
+		"""Default deserialized content to use if the file doesn't exist."""
+		raise NotImplementedError()
 
-    @property
-    def qml_data(self) -> Any:
-        """Data converted for usage in QML."""
-        return self.data
+	@property
+	def qml_data(self) -> Any:
+		"""Data converted for usage in QML."""
+		return self.data
 
-    def deserialized(self, data: str) -> Tuple[Any, bool]:
-        """Return parsed data from file text and whether to call `save()`."""
-        return (data, False)
+	def deserialized(self, data: str) -> Tuple[Any, bool]:
+		"""Return parsed data from file text and whether to call `save()`."""
+		return (data, False)
 
-    def serialized(self) -> str:
-        """Return text from `UserFile.data` that can be written to disk."""
-        raise NotImplementedError()
+	def serialized(self) -> str:
+		"""Return text from `UserFile.data` that can be written to disk."""
+		raise NotImplementedError()
 
-    def save(self) -> None:
-        """Inform the disk writer coroutine that the data has changed."""
-        self._need_write = True
+	def save(self) -> None:
+		"""Inform the disk writer coroutine that the data has changed."""
+		self._need_write = True
 
-    def stop_watching(self) -> None:
-        """Stop watching the on-disk file for changes."""
-        if self._reader:
-            self._reader.cancel()
+	def stop_watching(self) -> None:
+		"""Stop watching the on-disk file for changes."""
+		if self._reader:
+			self._reader.cancel()
 
-        if self._writer:
-            self._writer.cancel()
+		if self._writer:
+			self._writer.cancel()
 
-        for child in self.children.values():
-            child.stop_watching()
+		for child in self.children.values():
+			child.stop_watching()
 
 
-    async def set_data(self, data: Any) -> None:
-        """Set `data` and call `save()`, conveniance method for QML."""
-        self.data = data
-        self.save()
+	async def set_data(self, data: Any) -> None:
+		"""Set `data` and call `save()`, conveniance method for QML."""
+		self.data = data
+		self.save()
 
-    async def update_from_file(self) -> None:
-        """Read file at `path`, update `data` and call `save()` if needed."""
+	async def update_from_file(self) -> None:
+		"""Read file at `path`, update `data` and call `save()` if needed."""
 
-        if not self.path.exists():
-            self.data        = self.default_data
-            self._need_write = self.create_missing
-            return
+		if not self.path.exists():
+			self.data		= self.default_data
+			self._need_write = self.create_missing
+			return
 
-        async with aiopen(self.path) as file:
-            self.data, self._need_write = self.deserialized(await file.read())
+		async with aiopen(self.path) as file:
+			self.data, self._need_write = self.deserialized(await file.read())
 
-    async def _start_reader(self) -> None:
-        """Disk reader coroutine, watches for file changes to update `data`."""
+	async def _start_reader(self) -> None:
+		"""Disk reader coroutine, watches for file changes to update `data`."""
 
-        while not self.path.exists():
-            await asyncio.sleep(1)
+		while not self.path.exists():
+			await asyncio.sleep(1)
 
-        async for changes in awatch(self.path):
-            try:
-                ignored = 0
+		async for changes in awatch(self.path):
+			try:
+				ignored = 0
 
-                for change in changes:
-                    if change[0] in (Change.added, Change.modified):
-                        mtime = self.path.stat().st_mtime
+				for change in changes:
+					if change[0] in (Change.added, Change.modified):
+						mtime = self.path.stat().st_mtime
 
-                        if mtime == self._mtime:
-                            ignored += 1
-                            continue
+						if mtime == self._mtime:
+							ignored += 1
+							continue
 
-                        await self.update_from_file()
-                        self._mtime = mtime
+						await self.update_from_file()
+						self._mtime = mtime
 
-                    elif change[0] == Change.deleted:
-                        self._mtime      = None
-                        self.data        = self.default_data
-                        self._need_write = self.create_missing
+					elif change[0] == Change.deleted:
+						self._mtime	  = None
+						self.data		= self.default_data
+						self._need_write = self.create_missing
 
-                if changes and ignored < len(changes):
-                    UserFileChanged(type(self), self.qml_data)
+				if changes and ignored < len(changes):
+					UserFileChanged(type(self), self.qml_data)
 
-                    parent = self.parent
-                    while parent:
-                        await parent.update_from_file()
-                        UserFileChanged(type(parent), parent.qml_data)
-                        parent = parent.parent
+					parent = self.parent
+					while parent:
+						await parent.update_from_file()
+						UserFileChanged(type(parent), parent.qml_data)
+						parent = parent.parent
 
-                while not self.path.exists():
-                    # Prevent error spam after file gets deleted
-                    await asyncio.sleep(0.5)
+				while not self.path.exists():
+					# Prevent error spam after file gets deleted
+					await asyncio.sleep(0.5)
 
-            except Exception as err:  # noqa
-                LoopException(str(err), err, traceback.format_exc().rstrip())
+			except Exception as err:  # noqa
+				LoopException(str(err), err, traceback.format_exc().rstrip())
 
-    async def _start_writer(self) -> None:
-        """Disk writer coroutine, update the file with a 1 second cooldown."""
+	async def _start_writer(self) -> None:
+		"""Disk writer coroutine, update the file with a 1 second cooldown."""
 
-        if self.write_path.parts[0] == "qrc:":
-            return
+		if self.write_path.parts[0] == "qrc:":
+			return
 
-        self.write_path.parent.mkdir(parents=True, exist_ok=True)
+		self.write_path.parent.mkdir(parents=True, exist_ok=True)
 
-        while True:
-            await asyncio.sleep(1)
+		while True:
+			await asyncio.sleep(1)
 
-            try:
-                if self._need_write:
-                    async with atomic_write(self.write_path) as (new, done):
-                        await new.write(self.serialized())
-                        done()
+			try:
+				if self._need_write:
+					async with atomic_write(self.write_path) as (new, done):
+						await new.write(self.serialized())
+						done()
 
-                    self._need_write = False
-                    self._mtime      = self.write_path.stat().st_mtime
+					self._need_write = False
+					self._mtime	  = self.write_path.stat().st_mtime
 
-            except Exception as err:  # noqa
-                self._need_write = False
-                LoopException(str(err), err, traceback.format_exc().rstrip())
+			except Exception as err:  # noqa
+				self._need_write = False
+				LoopException(str(err), err, traceback.format_exc().rstrip())
 
 
 @dataclass
 class ConfigFile(UserFile):
-    """A file that goes in the configuration directory, e.g. ~/.config/app."""
+	"""A file that goes in the configuration directory, e.g. ~/.config/app."""
 
-    @property
-    def path(self) -> Path:
-        return Path(
-            os.environ.get("MOMENT_CONFIG_DIR") or
-            self.backend.appdirs.user_config_dir,
-        ) / self.filename
+	@property
+	def path(self) -> Path:
+		return Path(
+			os.environ.get("MOMENT_CONFIG_DIR") or
+			self.backend.appdirs.user_config_dir,
+		) / self.filename
 
 
 @dataclass
 class UserDataFile(UserFile):
-    """A file that goes in the user data directory, e.g. ~/.local/share/app."""
+	"""A file that goes in the user data directory, e.g. ~/.local/share/app."""
 
-    @property
-    def path(self) -> Path:
-        return Path(
-            os.environ.get("MOMENT_DATA_DIR") or
-            self.backend.appdirs.user_data_dir,
-        ) / self.filename
+	@property
+	def path(self) -> Path:
+		return Path(
+			os.environ.get("MOMENT_DATA_DIR") or
+			self.backend.appdirs.user_data_dir,
+		) / self.filename
 
 
 @dataclass
 class MappingFile(MutableMapping, UserFile):
-    """A file manipulable like a dict. `data` must be a mutable mapping."""
+	"""A file manipulable like a dict. `data` must be a mutable mapping."""
 
-    def __getitem__(self, key: Any) -> Any:
-        return self.data[key]
+	def __getitem__(self, key: Any) -> Any:
+		return self.data[key]
 
-    def __setitem__(self, key: Any, value: Any) -> None:
-        self.data[key] = value
+	def __setitem__(self, key: Any, value: Any) -> None:
+		self.data[key] = value
 
-    def __delitem__(self, key: Any) -> None:
-        del self.data[key]
+	def __delitem__(self, key: Any) -> None:
+		del self.data[key]
 
-    def __iter__(self) -> Iterator:
-        return iter(self.data)
+	def __iter__(self) -> Iterator:
+		return iter(self.data)
 
-    def __len__(self) -> int:
-        return len(self.data)
+	def __len__(self) -> int:
+		return len(self.data)
 
-    def __getattr__(self, key: Any) -> Any:
-        try:
-            return self.data[key]
-        except KeyError:
-            return super().__getattribute__(key)
+	def __getattr__(self, key: Any) -> Any:
+		try:
+			return self.data[key]
+		except KeyError:
+			return super().__getattribute__(key)
 
-    def __setattr__(self, key: Any, value: Any) -> None:
-        if key in self.__dataclass_fields__:
-            super().__setattr__(key, value)
-            return
+	def __setattr__(self, key: Any, value: Any) -> None:
+		if key in self.__dataclass_fields__:
+			super().__setattr__(key, value)
+			return
 
-        self.data[key] = value
+		self.data[key] = value
 
-    def __delattr__(self, key: Any) -> None:
-        del self.data[key]
+	def __delattr__(self, key: Any) -> None:
+		del self.data[key]
 
 
 @dataclass
 class JSONFile(MappingFile):
-    """A file stored on disk in the JSON format."""
+	"""A file stored on disk in the JSON format."""
 
-    @property
-    def default_data(self) -> dict:
-        return {}
+	@property
+	def default_data(self) -> dict:
+		return {}
 
-    def deserialized(self, data: str) -> Tuple[dict, bool]:
-        """Return parsed data from file text and whether to call `save()`.
+	def deserialized(self, data: str) -> Tuple[dict, bool]:
+		"""Return parsed data from file text and whether to call `save()`.
 
-        If the file has missing keys, the missing data will be merged to the
-        returned dict and the second tuple item will be `True`.
-        """
+		If the file has missing keys, the missing data will be merged to the
+		returned dict and the second tuple item will be `True`.
+		"""
 
-        loaded   = json.loads(data)
-        all_data = self.default_data.copy()
-        dict_update_recursive(all_data, loaded)
-        return (all_data, loaded != all_data)
+		loaded   = json.loads(data)
+		all_data = self.default_data.copy()
+		dict_update_recursive(all_data, loaded)
+		return (all_data, loaded != all_data)
 
-    def serialized(self) -> str:
-        data = self.data
-        return json.dumps(data, indent=4, ensure_ascii=False, sort_keys=True)
+	def serialized(self) -> str:
+		data = self.data
+		return json.dumps(data, indent=4, ensure_ascii=False, sort_keys=True)
 
 
 @dataclass
 class PCNFile(MappingFile):
-    """File stored in the PCN format, with machine edits in a separate JSON."""
+	"""File stored in the PCN format, with machine edits in a separate JSON."""
 
-    create_missing = False
+	create_missing = False
 
-    path_override: Optional[Path]        = None
+	path_override: Optional[Path]		= None
 
-    @property
-    def path(self) -> Path:
-        return self.path_override or super().path
+	@property
+	def path(self) -> Path:
+		return self.path_override or super().path
 
-    @property
-    def write_path(self) -> Path:
-        """Full path of file where programatically-done edits are stored."""
-        return self.path.with_suffix(".gui.json")
+	@property
+	def write_path(self) -> Path:
+		"""Full path of file where programatically-done edits are stored."""
+		return self.path.with_suffix(".gui.json")
 
-    @property
-    def qml_data(self) -> Dict[str, Any]:
-        return deep_serialize_for_qml(self.data.as_dict())  # type: ignore
+	@property
+	def qml_data(self) -> Dict[str, Any]:
+		return deep_serialize_for_qml(self.data.as_dict())  # type: ignore
 
-    @property
-    def default_data(self) -> Section:
-        return Section()
+	@property
+	def default_data(self) -> Section:
+		return Section()
 
-    def deserialized(self, data: str) -> Tuple[Section, bool]:
-        root  = Section.from_source_code(data, self.path)
-        edits = "{}"
+	def deserialized(self, data: str) -> Tuple[Section, bool]:
+		root  = Section.from_source_code(data, self.path)
+		edits = "{}"
 
-        if self.write_path.exists():
-            edits = self.write_path.read_text()
+		if self.write_path.exists():
+			edits = self.write_path.read_text()
 
-        includes_now = list(root.all_includes)
+		includes_now = list(root.all_includes)
 
-        for path, pcn in self.children.copy().items():
-            if path not in includes_now:
-                pcn.stop_watching()
-                del self.children[path]
+		for path, pcn in self.children.copy().items():
+			if path not in includes_now:
+				pcn.stop_watching()
+				del self.children[path]
 
-        for path in includes_now:
-            if path not in self.children:
-                self.children[path] = PCNFile(
-                    self.backend,
-                    filename      = path.name,
-                    parent        = self,
-                    path_override = path,
-                )
+		for path in includes_now:
+			if path not in self.children:
+				self.children[path] = PCNFile(
+					self.backend,
+					filename	  = path.name,
+					parent		= self,
+					path_override = path,
+				)
 
-        return (root, root.deep_merge_edits(json.loads(edits)))
+		return (root, root.deep_merge_edits(json.loads(edits)))
 
-    def serialized(self) -> str:
-        edits = self.data.edits_as_dict()
-        return json.dumps(edits, indent=4, ensure_ascii=False)
+	def serialized(self) -> str:
+		edits = self.data.edits_as_dict()
+		return json.dumps(edits, indent=4, ensure_ascii=False)
 
-    async def set_data(self, data: Dict[str, Any]) -> None:
-        self.data.deep_merge_edits({"set": data}, has_expressions=False)
-        self.save()
+	async def set_data(self, data: Dict[str, Any]) -> None:
+		self.data.deep_merge_edits({"set": data}, has_expressions=False)
+		self.save()
 
 
 @dataclass
 class Accounts(ConfigFile, JSONFile):
-    """Config file for saved matrix accounts: user ID, access tokens, etc"""
+	"""Config file for saved matrix accounts: user ID, access tokens, etc"""
 
-    filename: str = "accounts.json"
+	filename: str = "accounts.json"
 
-    async def any_saved(self) -> bool:
-        """Return for QML whether there are any accounts saved on disk."""
-        return bool(self.data)
+	async def any_saved(self) -> bool:
+		"""Return for QML whether there are any accounts saved on disk."""
+		return bool(self.data)
 
-    async def add(self, user_id: str) -> None:
-        """Add an account to the config and write it on disk.
+	async def add(self, user_id: str) -> None:
+		"""Add an account to the config and write it on disk.
 
-        The account's details such as its access token are retrieved from
-        the corresponding `MatrixClient` in `backend.clients`.
-        """
+		The account's details such as its access token are retrieved from
+		the corresponding `MatrixClient` in `backend.clients`.
+		"""
 
-        client  = self.backend.clients[user_id]
-        account = self.backend.models["accounts"][user_id]
+		client  = self.backend.clients[user_id]
+		account = self.backend.models["accounts"][user_id]
 
-        self.update({
-            client.user_id: {
-                "homeserver": client.homeserver,
-                "token":      client.access_token,
-                "device_id":  client.device_id,
-                "enabled":    True,
-                "presence":   account.presence.value.replace("echo_", ""),
-                "status_msg": account.status_msg,
-                "order":      account.order,
-            },
-        })
-        self.save()
+		self.update({
+			client.user_id: {
+				"homeserver": client.homeserver,
+				"token":	  client.access_token,
+				"device_id":  client.device_id,
+				"enabled":	True,
+				"presence":   account.presence.value.replace("echo_", ""),
+				"status_msg": account.status_msg,
+				"order":	  account.order,
+			},
+		})
+		self.save()
 
-    async def set(
-        self,
-        user_id:    str,
-        enabled:    Optional[str] = None,
-        presence:   Optional[str] = None,
-        order:      Optional[int] = None,
-        status_msg: Optional[str] = None,
-    ) -> None:
-        """Update an account if found in the config file and write to disk."""
+	async def set(
+		self,
+		user_id:	str,
+		enabled:	Optional[str] = None,
+		presence:   Optional[str] = None,
+		order:	  Optional[int] = None,
+		status_msg: Optional[str] = None,
+	) -> None:
+		"""Update an account if found in the config file and write to disk."""
 
-        if user_id not in self:
-            return
+		if user_id not in self:
+			return
 
-        if enabled is not None:
-            self[user_id]["enabled"] = enabled
+		if enabled is not None:
+			self[user_id]["enabled"] = enabled
 
-        if presence is not None:
-            self[user_id]["presence"] = presence
+		if presence is not None:
+			self[user_id]["presence"] = presence
 
-        if order is not None:
-            self[user_id]["order"] = order
+		if order is not None:
+			self[user_id]["order"] = order
 
-        if status_msg is not None:
-            self[user_id]["status_msg"] = status_msg
+		if status_msg is not None:
+			self[user_id]["status_msg"] = status_msg
 
-        self.save()
+		self.save()
 
-    async def forget(self, user_id: str) -> None:
-        """Delete an account from the config and write it on disk."""
+	async def forget(self, user_id: str) -> None:
+		"""Delete an account from the config and write it on disk."""
 
-        self.pop(user_id, None)
-        self.save()
+		self.pop(user_id, None)
+		self.save()
 
 
 @dataclass
 class Pre070Settings(ConfigFile):
-    """Detect and warn about the presence of a pre-0.7.0 settings.json file."""
+	"""Detect and warn about the presence of a pre-0.7.0 settings.json file."""
 
-    filename: str = "settings.json"
+	filename: str = "settings.json"
 
-    def __post_init__(self) -> None:
-        if self.path.exists():
-            Pre070SettingsDetected(self.path)
+	def __post_init__(self) -> None:
+		if self.path.exists():
+			Pre070SettingsDetected(self.path)
 
 
 @dataclass
 class Settings(ConfigFile, PCNFile):
-    """General config file for UI and backend settings"""
+	"""General config file for UI and backend settings"""
 
-    filename: str = "settings.py"
+	filename: str = "settings.py"
 
-    @property
-    def default_data(self) -> Section:
-        root  = Section.from_file("src/config/settings.py")
-        edits = "{}"
+	@property
+	def default_data(self) -> Section:
+		root  = Section.from_file("src/config/settings.py")
+		edits = "{}"
 
-        if self.write_path.exists():
-            edits = self.write_path.read_text()
+		if self.write_path.exists():
+			edits = self.write_path.read_text()
 
-        root.deep_merge_edits(json.loads(edits))
-        return root
+		root.deep_merge_edits(json.loads(edits))
+		return root
 
-    def deserialized(self, data: str) -> Tuple[Section, bool]:
-        section, save = super().deserialized(data)
+	def deserialized(self, data: str) -> Tuple[Section, bool]:
+		section, save = super().deserialized(data)
 
-        if self and self.General.theme != section.General.theme:
-            if hasattr(self.backend, "theme"):
-                self.backend.theme.stop_watching()
+		if self and self.General.theme != section.General.theme:
+			if hasattr(self.backend, "theme"):
+				self.backend.theme.stop_watching()
 
-            self.backend.theme = Theme(
-                self.backend, section.General.theme,  # type: ignore
-            )
-            UserFileChanged(Theme, self.backend.theme.qml_data)
+			self.backend.theme = Theme(
+				self.backend, section.General.theme,  # type: ignore
+			)
+			UserFileChanged(Theme, self.backend.theme.qml_data)
 
-        # if self and self.General.new_theme != section.General.new_theme:
-        #     self.backend.new_theme.stop_watching()
-        #     self.backend.new_theme = NewTheme(
-        #         self.backend, section.General.new_theme,  # type: ignore
-        #     )
-        #     UserFileChanged(Theme, self.backend.new_theme.qml_data)
+		# if self and self.General.new_theme != section.General.new_theme:
+		#	 self.backend.new_theme.stop_watching()
+		#	 self.backend.new_theme = NewTheme(
+		#		 self.backend, section.General.new_theme,  # type: ignore
+		#	 )
+		#	 UserFileChanged(Theme, self.backend.new_theme.qml_data)
 
-        return (section, save)
+		return (section, save)
 
 
 @dataclass
 class NewTheme(UserDataFile, PCNFile):
-    """A theme file defining the look of QML components."""
+	"""A theme file defining the look of QML components."""
 
-    create_missing = False
+	create_missing = False
 
-    @property
-    def path(self) -> Path:
-        data_dir = Path(
-            os.environ.get("MOMENT_DATA_DIR") or
-            self.backend.appdirs.user_data_dir,
-        )
-        return data_dir / "themes" / self.filename
+	@property
+	def path(self) -> Path:
+		data_dir = Path(
+			os.environ.get("MOMENT_DATA_DIR") or
+			self.backend.appdirs.user_data_dir,
+		)
+		return data_dir / "themes" / self.filename
 
-    @property
-    def qml_data(self) -> Dict[str, Any]:
-        return flatten_dict_keys(super().qml_data, last_level=False)
+	@property
+	def qml_data(self) -> Dict[str, Any]:
+		return flatten_dict_keys(super().qml_data, last_level=False)
 
 
 @dataclass
 class UIState(UserDataFile, JSONFile):
-    """File used to save and restore the state of QML components."""
+	"""File used to save and restore the state of QML components."""
 
-    filename: str = "state.json"
+	filename: str = "state.json"
 
-    @property
-    def default_data(self) -> dict:
-        return {
-            "collapseAccounts": {},
-            "page":             "Pages/Default.qml",
-            "pageProperties":   {},
-        }
+	@property
+	def default_data(self) -> dict:
+		return {
+			"collapseAccounts": {},
+			"page":			 "Pages/Default.qml",
+			"pageProperties":   {},
+		}
 
-    def deserialized(self, data: str) -> Tuple[dict, bool]:
-        dict_data, save = super().deserialized(data)
+	def deserialized(self, data: str) -> Tuple[dict, bool]:
+		dict_data, save = super().deserialized(data)
 
-        for user_id, do in dict_data["collapseAccounts"].items():
-            self.backend.models["all_rooms"].set_account_collapse(user_id, do)
+		for user_id, do in dict_data["collapseAccounts"].items():
+			self.backend.models["all_rooms"].set_account_collapse(user_id, do)
 
-        return (dict_data, save)
+		return (dict_data, save)
 
 
 @dataclass
 class History(UserDataFile, JSONFile):
-    """File to save and restore lines typed by the user in QML components."""
+	"""File to save and restore lines typed by the user in QML components."""
 
-    filename: str = "history.json"
+	filename: str = "history.json"
 
-    @property
-    def default_data(self) -> dict:
-        return {"console": []}
+	@property
+	def default_data(self) -> dict:
+		return {"console": []}
 
 
 @dataclass
 class Theme(UserDataFile):
-    """A theme file defining the look of QML components."""
+	"""A theme file defining the look of QML components."""
 
-    # Since it currently breaks at every update and the file format will be
-    # changed later, don't copy the theme to user data dir if it doesn't exist.
-    create_missing = False
+	# Since it currently breaks at every update and the file format will be
+	# changed later, don't copy the theme to user data dir if it doesn't exist.
+	create_missing = False
 
-    @property
-    def path(self) -> Path:
-        data_dir = Path(
-            os.environ.get("MOMENT_DATA_DIR") or
-            self.backend.appdirs.user_data_dir,
-        )
-        return data_dir / "themes" / self.filename
+	@property
+	def path(self) -> Path:
+		data_dir = Path(
+			os.environ.get("MOMENT_DATA_DIR") or
+			self.backend.appdirs.user_data_dir,
+		)
+		return data_dir / "themes" / self.filename
 
-    @property
-    def default_data(self) -> str:
-        if self.filename in ("Foliage.qpl", "Midnight.qpl", "Glass.qpl"):
-            path = f"src/themes/{self.filename}"
-        else:
-            path = "src/themes/Foliage.qpl"
+	@property
+	def default_data(self) -> str:
+		if self.filename in ("Foliage.qpl", "Midnight.qpl", "Glass.qpl"):
+			path = f"src/themes/{self.filename}"
+		else:
+			path = "src/themes/Foliage.qpl"
 
-        try:
-            byte_content = pyotherside.qrc_get_file_contents(path)
-        except ValueError:
-            # App was compiled without QRC
-            return convert_to_qml(Path(path).read_text())
-        else:
-            return convert_to_qml(byte_content.decode())
+		try:
+			byte_content = pyotherside.qrc_get_file_contents(path)
+		except ValueError:
+			# App was compiled without QRC
+			return convert_to_qml(Path(path).read_text())
+		else:
+			return convert_to_qml(byte_content.decode())
 
-    def deserialized(self, data: str) -> Tuple[str, bool]:
-        return (convert_to_qml(data), False)
+	def deserialized(self, data: str) -> Tuple[str, bool]:
+		return (convert_to_qml(data), False)

src/backend/utils.py

@@ -14,14 +14,15 @@ import xml.etree.cElementTree as xml_etree
 from concurrent.futures import ProcessPoolExecutor
 from contextlib import suppress
 from datetime import date, datetime, time, timedelta
+from difflib import SequenceMatcher
 from enum import Enum
 from enum import auto as autostr
 from pathlib import Path
 from tempfile import NamedTemporaryFile
 from types import ModuleType
 from typing import (
-    Any, AsyncIterator, Callable, Collection, Dict, Iterable, Mapping,
-    Optional, Tuple, Type, Union,
+	Any, AsyncIterator, Callable, Collection, Dict, Iterable, Mapping,
+	Optional, Tuple, Type, Union,
 )
 from uuid import UUID
 
@@ -36,348 +37,370 @@ from .color import Color
 from .pcn.section import Section
 
 if sys.version_info >= (3, 7):
-    from contextlib import asynccontextmanager
-    current_task = asyncio.current_task
+	from contextlib import asynccontextmanager
+	current_task = asyncio.current_task
 else:
-    from async_generator import asynccontextmanager
-    current_task = asyncio.Task.current_task
+	from async_generator import asynccontextmanager
+	current_task = asyncio.Task.current_task
 
 if sys.version_info >= (3, 10):
-    import collections.abc as collections
+	import collections.abc as collections
 else:
-    import collections
+	import collections
 
-Size       = Tuple[int, int]
+Size	   = Tuple[int, int]
 BytesOrPIL = Union[bytes, PILImage.Image]
-auto       = autostr
+auto	   = autostr
 
 COMPRESSION_POOL = ProcessPoolExecutor()
 
 
 class AutoStrEnum(Enum):
-    """An Enum where auto() assigns the member's name instead of an integer.
+	"""An Enum where auto() assigns the member's name instead of an integer.
 
-    Example:
-    >>> class Fruits(AutoStrEnum): apple = auto()
-    >>> Fruits.apple.value
-    "apple"
-    """
+	Example:
+	>>> class Fruits(AutoStrEnum): apple = auto()
+	>>> Fruits.apple.value
+	"apple"
+	"""
 
-    @staticmethod
-    def _generate_next_value_(name, *_):
-        return name
+	@staticmethod
+	def _generate_next_value_(name, *_):
+		return name
 
 
 def dict_update_recursive(dict1: dict, dict2: dict) -> None:
-    """Deep-merge `dict1` and `dict2`, recursive version of `dict.update()`."""
-    # https://gist.github.com/angstwad/bf22d1822c38a92ec0a9
+	"""Deep-merge `dict1` and `dict2`, recursive version of `dict.update()`."""
+	# https://gist.github.com/angstwad/bf22d1822c38a92ec0a9
 
-    for k in dict2:
-        if (k in dict1 and isinstance(dict1[k], dict) and
-                isinstance(dict2[k], collections.Mapping)):
-            dict_update_recursive(dict1[k], dict2[k])
-        else:
-            dict1[k] = dict2[k]
+	for k in dict2:
+		if (k in dict1 and isinstance(dict1[k], dict) and
+				isinstance(dict2[k], collections.Mapping)):
+			dict_update_recursive(dict1[k], dict2[k])
+		else:
+			dict1[k] = dict2[k]
 
 
 def flatten_dict_keys(
-    source:     Optional[Dict[str, Any]] = None,
-    separator:  str                      = ".",
-    last_level: bool                     = True,
-    _flat:      Optional[Dict[str, Any]] = None,
-    _prefix:    str                      = "",
+	source:	 Optional[Dict[str, Any]] = None,
+	separator:  str					  = ".",
+	last_level: bool					 = True,
+	_flat:	  Optional[Dict[str, Any]] = None,
+	_prefix:	str					  = "",
 ) -> Dict[str, Any]:
-    """Return a flattened version of the ``source`` dict.
+	"""Return a flattened version of the ``source`` dict.
 
-    Example:
-        >>> dct
-        {"content": {"body": "foo"}, "m.test": {"key": {"bar": 1}}}
-        >>> flatten_dict_keys(dct)
-        {"content.body": "foo", "m.test.key.bar": 1}
-        >>> flatten_dict_keys(dct, last_level=False)
-        {"content": {"body": "foo"}, "m.test.key": {bar": 1}}
-    """
+	Example:
+		>>> dct
+		{"content": {"body": "foo"}, "m.test": {"key": {"bar": 1}}}
+		>>> flatten_dict_keys(dct)
+		{"content.body": "foo", "m.test.key.bar": 1}
+		>>> flatten_dict_keys(dct, last_level=False)
+		{"content": {"body": "foo"}, "m.test.key": {bar": 1}}
+	"""
 
-    flat = {} if _flat is None else _flat
+	flat = {} if _flat is None else _flat
 
-    for key, value in (source or {}).items():
-        if isinstance(value, dict):
-            prefix = f"{_prefix}{key}{separator}"
-            flatten_dict_keys(value, separator, last_level, flat, prefix)
-        elif last_level:
-            flat[f"{_prefix}{key}"] = value
-        else:
-            prefix = _prefix[:-len(separator)]  # remove trailing separator
-            flat.setdefault(prefix, {})[key] = value
+	for key, value in (source or {}).items():
+		if isinstance(value, dict):
+			prefix = f"{_prefix}{key}{separator}"
+			flatten_dict_keys(value, separator, last_level, flat, prefix)
+		elif last_level:
+			flat[f"{_prefix}{key}"] = value
+		else:
+			prefix = _prefix[:-len(separator)]  # remove trailing separator
+			flat.setdefault(prefix, {})[key] = value
 
-    return flat
+	return flat
 
 
 def config_get_account_room_rule(
-    rules: Section, user_id: str, room_id: str,
+	rules: Section, user_id: str, room_id: str,
 ) -> Any:
-    """Return best matching rule value for an account/room PCN free Section."""
+	"""Return best matching rule value for an account/room PCN free Section."""
 
-    for name, value in reversed(rules.children()):
-        name = re.sub(r"\s+", " ", name.strip())
+	for name, value in reversed(rules.children()):
+		name = re.sub(r"\s+", " ", name.strip())
 
-        if name in (user_id, room_id, f"{user_id} {room_id}"):
-            return value
+		if name in (user_id, room_id, f"{user_id} {room_id}"):
+			return value
 
-    return rules.default
+	return rules.default
 
 
 async def is_svg(file: File) -> bool:
-    """Return whether the file is a SVG (`lxml` is used for detection)."""
+	"""Return whether the file is a SVG (`lxml` is used for detection)."""
 
-    chunks = [c async for c in async_generator_from_data(file)]
+	chunks = [c async for c in async_generator_from_data(file)]
 
-    with io.BytesIO(b"".join(chunks)) as file:
-        try:
-            _, element = next(xml_etree.iterparse(file, ("start",)))
-            return element.tag == "{http://www.w3.org/2000/svg}svg"
-        except (StopIteration, xml_etree.ParseError):
-            return False
+	with io.BytesIO(b"".join(chunks)) as file:
+		try:
+			_, element = next(xml_etree.iterparse(file, ("start",)))
+			return element.tag == "{http://www.w3.org/2000/svg}svg"
+		except (StopIteration, xml_etree.ParseError):
+			return False
 
 
 async def svg_dimensions(file: File) -> Size:
-    """Return the width and height, or viewBox width and height for a SVG.
+	"""Return the width and height, or viewBox width and height for a SVG.
 
-    If these properties are missing (broken file), ``(256, 256)`` is returned.
-    """
+	If these properties are missing (broken file), ``(256, 256)`` is returned.
+	"""
 
-    chunks = [c async for c in async_generator_from_data(file)]
+	chunks = [c async for c in async_generator_from_data(file)]
 
-    with io.BytesIO(b"".join(chunks)) as file:
-        attrs = xml_etree.parse(file).getroot().attrib
+	with io.BytesIO(b"".join(chunks)) as file:
+		attrs = xml_etree.parse(file).getroot().attrib
 
-    try:
-        width = round(float(attrs.get("width", attrs["viewBox"].split()[3])))
-    except (KeyError, IndexError, ValueError, TypeError):
-        width = 256
+	try:
+		width = round(float(attrs.get("width", attrs["viewBox"].split()[3])))
+	except (KeyError, IndexError, ValueError, TypeError):
+		width = 256
 
-    try:
-        height = round(float(attrs.get("height", attrs["viewBox"].split()[4])))
-    except (KeyError, IndexError, ValueError, TypeError):
-        height = 256
+	try:
+		height = round(float(attrs.get("height", attrs["viewBox"].split()[4])))
+	except (KeyError, IndexError, ValueError, TypeError):
+		height = 256
 
-    return (width, height)
+	return (width, height)
 
 
 async def guess_mime(file: File) -> str:
-    """Return the file's mimetype, or `application/octet-stream` if unknown."""
+	"""Return the file's mimetype, or `application/octet-stream` if unknown."""
 
-    if isinstance(file, io.IOBase):
-        file.seek(0, 0)
-    elif isinstance(file, AsyncBufferedIOBase):
-        await file.seek(0, 0)
+	if isinstance(file, io.IOBase):
+		file.seek(0, 0)
+	elif isinstance(file, AsyncBufferedIOBase):
+		await file.seek(0, 0)
 
-    try:
-        first_chunk: bytes
-        async for first_chunk in async_generator_from_data(file):
-            break
-        else:
-            return "inode/x-empty"  # empty file
+	try:
+		first_chunk: bytes
+		async for first_chunk in async_generator_from_data(file):
+			break
+		else:
+			return "inode/x-empty"  # empty file
 
-        # TODO: plaintext
-        mime = filetype.guess_mime(first_chunk)
+		# TODO: plaintext
+		mime = filetype.guess_mime(first_chunk)
 
-        return mime or (
-            "image/svg+xml" if await is_svg(file) else
-            "application/octet-stream"
-        )
-    finally:
-        if isinstance(file, io.IOBase):
-            file.seek(0, 0)
-        elif isinstance(file, AsyncBufferedIOBase):
-            await file.seek(0, 0)
+		return mime or (
+			"image/svg+xml" if await is_svg(file) else
+			"application/octet-stream"
+		)
+	finally:
+		if isinstance(file, io.IOBase):
+			file.seek(0, 0)
+		elif isinstance(file, AsyncBufferedIOBase):
+			await file.seek(0, 0)
 
 
 def plain2html(text: str) -> str:
-    """Convert `\\n` into `<br>` tags and `\\t` into four spaces."""
+	"""Convert `\\n` into `<br>` tags and `\\t` into four spaces."""
 
-    return html.escape(text)\
-               .replace("\n", "<br>")\
-               .replace("\t", "&nbsp;" * 4)
+	return html.escape(text)\
+			   .replace("\n", "<br>")\
+			   .replace("\t", "&nbsp;" * 4)
 
 
 def strip_html_tags(text: str) -> str:
-    """Remove HTML tags from text."""
-    return re.sub(r"<\/?[^>]+(>|$)", "", text)
+	"""Remove HTML tags from text."""
+	return re.sub(r"<\/?[^>]+(>|$)", "", text)
+
+
+def remove_reply(text: str):
+    return re.sub(r"<mx-reply.*?>.*?<\/mx-reply>", "", text)
+
+
+def diff_body(a: str, b: str):
+    sm = SequenceMatcher(None, remove_reply(a), remove_reply(b))
+    output = []
+    for opcode, a0, a1, b0, b1 in sm.get_opcodes():
+        if opcode == "equal":
+            output.append(sm.a[a0:a1])
+        elif opcode == "insert":
+            output.append(f"<ins>{sm.b[b0:b1]}</ins>")
+        elif opcode == "delete":
+            output.append(f"<del>{sm.a[a0:a1]}</del>")
+        elif opcode == "replace":
+            output.append(f"<del>{sm.a[a0:a1]}</del>")
+            output.append(f"<ins>{sm.b[b0:b1]}</ins>")
+        else:
+            raise RuntimeError(f"unexpected opcode: {opcode}")
+    return "".join(output)
 
 
 def serialize_value_for_qml(
-    value: Any, json_list_dicts: bool = False, reject_unknown: bool = False,
+	value: Any, json_list_dicts: bool = False, reject_unknown: bool = False,
 ) -> Any:
-    """Convert a value to make it easier to use from QML.
+	"""Convert a value to make it easier to use from QML.
 
-    Returns:
+	Returns:
 
-    - For `bool`, `int`, `float`, `bytes`, `str`, `datetime`, `date`, `time`:
-      the unchanged value (PyOtherSide handles these)
+	- For `bool`, `int`, `float`, `bytes`, `str`, `datetime`, `date`, `time`:
+	  the unchanged value (PyOtherSide handles these)
 
-    - For `Collection` objects (includes `list` and `dict`):
-      a JSON dump if `json_list_dicts` is `True`, else the unchanged value
+	- For `Collection` objects (includes `list` and `dict`):
+	  a JSON dump if `json_list_dicts` is `True`, else the unchanged value
 
-    - If the value is an instancied object and has a `serialized` attribute or
-      property, return that
+	- If the value is an instancied object and has a `serialized` attribute or
+	  property, return that
 
-    - For `Enum` members, the actual value of the member
+	- For `Enum` members, the actual value of the member
 
-    - For `Path` objects, a `file://<path...>` string
+	- For `Path` objects, a `file://<path...>` string
 
-    - For `UUID` object: the UUID in string form
+	- For `UUID` object: the UUID in string form
 
-    - For `timedelta` objects: the delta as a number of milliseconds `int`
+	- For `timedelta` objects: the delta as a number of milliseconds `int`
 
-    - For `Color` objects: the color's hexadecimal value
+	- For `Color` objects: the color's hexadecimal value
 
-    - For class types: the class `__name__`
+	- For class types: the class `__name__`
 
-    - For anything else: raise a `TypeError` if `reject_unknown` is `True`,
-      else return the unchanged value.
-    """
+	- For anything else: raise a `TypeError` if `reject_unknown` is `True`,
+	  else return the unchanged value.
+	"""
 
-    if isinstance(value, (bool, int, float, bytes, str, datetime, date, time)):
-        return value
+	if isinstance(value, (bool, int, float, bytes, str, datetime, date, time)):
+		return value
 
-    if json_list_dicts and isinstance(value, Collection):
-        if isinstance(value, set):
-            value = list(value)
-        return json.dumps(value)
+	if json_list_dicts and isinstance(value, Collection):
+		if isinstance(value, set):
+			value = list(value)
+		return json.dumps(value)
 
-    if not inspect.isclass(value) and hasattr(value, "serialized"):
-        return value.serialized
+	if not inspect.isclass(value) and hasattr(value, "serialized"):
+		return value.serialized
 
-    if isinstance(value, Iterable):
-        return value
+	if isinstance(value, Iterable):
+		return value
 
-    if hasattr(value, "__class__") and issubclass(value.__class__, Enum):
-        return value.value
+	if hasattr(value, "__class__") and issubclass(value.__class__, Enum):
+		return value.value
 
-    if isinstance(value, Path):
-        return f"file://{value!s}"
+	if isinstance(value, Path):
+		return f"file://{value!s}"
 
-    if isinstance(value, UUID):
-        return str(value)
+	if isinstance(value, UUID):
+		return str(value)
 
-    if isinstance(value, timedelta):
-        return value.total_seconds() * 1000
+	if isinstance(value, timedelta):
+		return value.total_seconds() * 1000
 
-    if isinstance(value, Color):
-        return value.hex
+	if isinstance(value, Color):
+		return value.hex
 
-    if inspect.isclass(value):
-        return value.__name__
+	if inspect.isclass(value):
+		return value.__name__
 
-    if reject_unknown:
-        raise TypeError("Unknown type reject")
+	if reject_unknown:
+		raise TypeError("Unknown type reject")
 
-    return value
+	return value
 
 
 def deep_serialize_for_qml(obj: Iterable) -> Union[list, dict]:
-    """Recursively serialize lists and dict values for QML."""
+	"""Recursively serialize lists and dict values for QML."""
 
-    if isinstance(obj, Mapping):
-        dct = {}
+	if isinstance(obj, Mapping):
+		dct = {}
 
-        for key, value in obj.items():
-            if isinstance(value, Iterable) and not isinstance(value, str):
-                # PyOtherSide only accept dicts with string keys
-                dct[str(key)] = deep_serialize_for_qml(value)
-                continue
+		for key, value in obj.items():
+			if isinstance(value, Iterable) and not isinstance(value, str):
+				# PyOtherSide only accept dicts with string keys
+				dct[str(key)] = deep_serialize_for_qml(value)
+				continue
 
-            with suppress(TypeError):
-                dct[str(key)] = \
-                    serialize_value_for_qml(value, reject_unknown=True)
+			with suppress(TypeError):
+				dct[str(key)] = \
+					serialize_value_for_qml(value, reject_unknown=True)
 
-        return dct
+		return dct
 
-    lst = []
+	lst = []
 
-    for value in obj:
-        if isinstance(value, Iterable) and not isinstance(value, str):
-            lst.append(deep_serialize_for_qml(value))
-            continue
+	for value in obj:
+		if isinstance(value, Iterable) and not isinstance(value, str):
+			lst.append(deep_serialize_for_qml(value))
+			continue
 
-        with suppress(TypeError):
-            lst.append(serialize_value_for_qml(value, reject_unknown=True))
+		with suppress(TypeError):
+			lst.append(serialize_value_for_qml(value, reject_unknown=True))
 
-    return lst
+	return lst
 
 
 def classes_defined_in(module: ModuleType) -> Dict[str, Type]:
-    """Return a `{name: class}` dict of all the classes a module defines."""
+	"""Return a `{name: class}` dict of all the classes a module defines."""
 
-    return {
-        m[0]: m[1] for m in inspect.getmembers(module, inspect.isclass)
-        if not m[0].startswith("_") and
-        m[1].__module__.startswith(module.__name__)
-    }
+	return {
+		m[0]: m[1] for m in inspect.getmembers(module, inspect.isclass)
+		if not m[0].startswith("_") and
+		m[1].__module__.startswith(module.__name__)
+	}
 
 
 @asynccontextmanager
 async def aiopen(*args, **kwargs) -> AsyncIterator[Any]:
-    """Wrapper for `aiofiles.open()` that doesn't break mypy"""
-    async with aiofiles.open(*args, **kwargs) as file:
-        yield file
+	"""Wrapper for `aiofiles.open()` that doesn't break mypy"""
+	async with aiofiles.open(*args, **kwargs) as file:
+		yield file
 
 
 @asynccontextmanager
 async def atomic_write(
-    path: Union[Path, str], binary: bool = False, **kwargs,
+	path: Union[Path, str], binary: bool = False, **kwargs,
 ) -> AsyncIterator[Tuple[Any, Callable[[], None]]]:
-    """Write a file asynchronously (using aiofiles) and atomically.
+	"""Write a file asynchronously (using aiofiles) and atomically.
 
-    Yields a `(open_temporary_file, done_function)` tuple.
-    The done function should be called after writing to the given file.
-    When the context manager exits, the temporary file will either replace
-    `path` if the function was called, or be deleted.
+	Yields a `(open_temporary_file, done_function)` tuple.
+	The done function should be called after writing to the given file.
+	When the context manager exits, the temporary file will either replace
+	`path` if the function was called, or be deleted.
 
-    Example:
-    >>> async with atomic_write("foo.txt") as (file, done):
-    >>>     await file.write("Sample text")
-    >>>     done()
-    """
+	Example:
+	>>> async with atomic_write("foo.txt") as (file, done):
+	>>>	 await file.write("Sample text")
+	>>>	 done()
+	"""
 
-    mode      = "wb" if binary else "w"
-    path      = Path(path)
-    temp      = NamedTemporaryFile(dir=path.parent, delete=False)
-    temp_path = Path(temp.name)
+	mode	  = "wb" if binary else "w"
+	path	  = Path(path)
+	temp	  = NamedTemporaryFile(dir=path.parent, delete=False)
+	temp_path = Path(temp.name)
 
-    can_replace = False
+	can_replace = False
 
-    def done() -> None:
-        nonlocal can_replace
-        can_replace = True
+	def done() -> None:
+		nonlocal can_replace
+		can_replace = True
 
-    try:
-        async with aiopen(temp_path, mode, **kwargs) as out:
-            yield (out, done)
-    finally:
-        if can_replace:
-            temp_path.replace(path)
-        else:
-            temp_path.unlink()
+	try:
+		async with aiopen(temp_path, mode, **kwargs) as out:
+			yield (out, done)
+	finally:
+		if can_replace:
+			temp_path.replace(path)
+		else:
+			temp_path.unlink()
 
 
 def _compress(image: BytesOrPIL, fmt: str, optimize: bool) -> bytes:
-    if isinstance(image, bytes):
-        pil_image = PILImage.open(io.BytesIO(image))
-    else:
-        pil_image = image
+	if isinstance(image, bytes):
+		pil_image = PILImage.open(io.BytesIO(image))
+	else:
+		pil_image = image
 
-    with io.BytesIO() as buffer:
-        pil_image.save(buffer, fmt, optimize=optimize)
-        return buffer.getvalue()
+	with io.BytesIO() as buffer:
+		pil_image.save(buffer, fmt, optimize=optimize)
+		return buffer.getvalue()
 
 
 async def compress_image(
-    image: BytesOrPIL, fmt: str = "PNG", optimize: bool = True,
+	image: BytesOrPIL, fmt: str = "PNG", optimize: bool = True,
 ) -> bytes:
-    """Compress image in a separate process, without blocking event loop."""
+	"""Compress image in a separate process, without blocking event loop."""
 
-    return await asyncio.get_event_loop().run_in_executor(
-        COMPRESSION_POOL, _compress, image, fmt, optimize,
-    )
+	return await asyncio.get_event_loop().run_in_executor(
+		COMPRESSION_POOL, _compress, image, fmt, optimize,
+	)

src/gui/Base/HSelectableLabel.qml

@@ -35,7 +35,9 @@ TextEdit {
     focus: false
     selectByMouse: true
 
-    onLinkActivated: if (enableLinkActivation && link !== '#state-text')
+    onLinkActivated: if (enableLinkActivation
+            && link !== '#state-text'
+            && link !== '#replaced-text')
         Qt.openUrlExternally(link)
 
     MouseArea {

src/gui/Pages/AccountSettings/AccountSettings.qml

@@ -28,8 +28,17 @@ HPage {
             HTabButton { text: qsTr("Security") }
         }
 
-        General { userId: page.userId }
-        Notifications { userId: page.userId }
-        Security { userId: page.userId }
+        General {
+            userId: page.userId
+            implicitWidth: 0
+        }
+        Notifications {
+            userId: page.userId
+            implicitWidth: 0
+        }
+        Security {
+            userId: page.userId
+            implicitWidth: 0
+        }
     }
 }

src/gui/Pages/AccountSettings/General.qml

@@ -132,6 +132,8 @@ HFlickableColumnPage {
         // Layout.preferredWidth: 256 * theme.uiScale
         Layout.preferredHeight: width
 
+        HoverHandler { id: overlayHover }
+
         Rectangle {
             anchors.fill: parent
             z: 10
@@ -154,8 +156,6 @@ HFlickableColumnPage {
             Behavior on opacity { HNumberAnimation {} }
             Behavior on color { HColorAnimation {} }
 
-            HoverHandler { id: overlayHover }
-
             MouseArea {
                 anchors.fill: parent
                 enabled: ready && account.presence !== "offline"

src/gui/Pages/AddChat/AddChat.qml

@@ -26,8 +26,17 @@ HPage {
             HTabButton { text: qsTr("Create group") }
         }
 
-        DirectChat { userId: page.userId }
-        JoinRoom { userId: page.userId }
-        CreateRoom { userId: page.userId }
+        DirectChat {
+            userId: page.userId
+            implicitWidth: 0
+        }
+        JoinRoom {
+            userId: page.userId
+            implicitWidth: 0
+        }
+        CreateRoom {
+            userId: page.userId
+            implicitWidth: 0
+        }
     }
 }

src/gui/Pages/Chat/Timeline/EventContent.qml

@@ -49,6 +49,18 @@ HRowLayout {
             ">"
         ) + "</font></font></a>"
 
+    readonly property var reactions: model.reactions
+
+    readonly property var contentHistory: model.content_history
+    readonly property string replacedText:
+    `<a href="#replaced-text" style="text-decoration: none">` +
+    `<font size=${theme.fontSize.small}px><font ` + (
+            model.replaced ?
+            `color="${theme.chat.message.readCounter}">&nbsp;🖉` :  // U+1F589
+
+            ">"
+        ) + "</font></font></a>"
+
     readonly property bool pureMedia: ! contentText && linksRepeater.count
 
     readonly property bool hoveredSelectable: contentHover.hovered
@@ -123,6 +135,13 @@ HRowLayout {
             id: contentLabel
             visible: ! pureMedia
             enableLinkActivation: ! eventList.selectedCount
+            onLinkActivated:
+                if(link === "#replaced-text") window.makePopup(
+                    "Popups/MessageReplaceHistoryPopup.qml",
+                    {
+                        contentHistory: contentHistory
+                    },
+                )
 
             selectByMouse:
                 eventList.selectedCount <= 1 &&
@@ -163,6 +182,7 @@ HRowLayout {
                 timeText +
                 "</font>" +
 
+                replacedText +
                 stateText
 
             transform: Translate { x: xOffset }
@@ -298,6 +318,8 @@ HRowLayout {
 
                     linksRepeater.summedWidth +
                     (pureMedia ? 0 : parent.leftPadding + parent.rightPadding),
+
+                    reactionsRow.width
                 )
                 height: contentColumn.height
                 radius: theme.chat.message.radius
@@ -361,6 +383,94 @@ HRowLayout {
                 Layout.preferredHeight: item ? item.height : -1
             }
         }
+
+        Row {
+            id: reactionsRow
+
+            spacing: 10
+            bottomPadding: 7
+            leftPadding: 10
+            rightPadding: 10
+            Layout.alignment: onRight ? Qt.AlignRight : Qt.AlignLeft
+
+            Repeater {
+                id: reactionsRepeater
+
+                model: {
+                    const reactions = Object.entries(
+                        JSON.parse(eventDelegate.currentModel.reactions));
+                    return reactions;
+                }
+
+                Rectangle {
+                    id: reactionItem
+
+                    required property var modelData
+                    readonly property var icon: modelData[0]
+                    readonly property var hint: modelData[1]["hint"]
+                    readonly property var users: modelData[1]["users"]
+
+                    width: reactionContent.width
+                    height: theme.fontSize.normal + 10
+                    radius: width / 2
+                    color: theme.colors.strongBackground
+                    border.color: theme.colors.accentBackground
+                    border.width: 1
+
+                    Row {
+                        id: reactionContent
+                        spacing: 5
+                        topPadding: 3
+                        leftPadding: 10
+                        rightPadding: 10
+                        Text {
+                            id: reactionIcon
+                            color: theme.colors.brightText
+                            font.pixelSize: theme.fontSize.normal
+                            font.family: theme.fontFamily.sans
+                            text: parent.parent.icon
+                        }
+                        Text {
+                            id: reactionCounter
+                            color: theme.colors.brightText
+                            font.pixelSize: theme.fontSize.normal
+                            font.family: theme.fontFamily.sans
+                            text: parent.parent.users.length
+                        }
+                    }
+
+                    MouseArea {
+                        id: reactionItemMouseArea
+                        anchors.fill: parent
+                        onEntered: { reactionTooltip.visible = true }
+                        onExited: { reactionTooltip.visible = false }
+                        hoverEnabled: true
+                    }
+
+                    HToolTip {
+                        id: reactionTooltip
+                        visible: false
+
+                        label.textFormat: HLabel.StyledText
+                        text: {
+                            const members =
+                                ModelStore.get(chat.userId, chat.roomId, "members")
+
+                            const lines = [parent.hint]
+                            for (const userId of parent.users) {
+                                const member = members.find(userId)
+
+                                const by  = utils.coloredNameHtml(
+                                    member ? member.display_name: userId, userId,
+                                )
+                                lines.push(qsTr("%1").arg(by))
+                            }
+                            return lines.join("<br>")
+                        }
+                    }
+                }
+            }
+        }
     }
 
     HSpacer {}

src/gui/Pages/Chat/Timeline/EventDelegate.qml

@@ -72,20 +72,26 @@ HColumnLayout {
         eventList.toggleCheck(model.index)
     }
 
+    visible: !model.hidden
     width: eventList.width - eventList.leftMargin - eventList.rightMargin
 
     // Needed because of eventList's MouseArea which steals the
     // HSelectableLabel's MouseArea hover events
     onCursorShapeChanged: eventList.cursorShape = cursorShape
 
-    Component.onCompleted: if (model.fetch_profile)
-        fetchProfilesFutureId = py.callClientCoro(
-            chat.userId,
-            "get_event_profiles",
-            [chat.roomId, model.id],
-            // The if avoids segfault if eventDelegate is already destroyed
-            () => { if (eventDelegate) fetchProfilesFutureId = "" }
-        )
+    Component.onCompleted: {
+        if (model.fetch_profile)
+            fetchProfilesFutureId = py.callClientCoro(
+                chat.userId,
+                "get_event_profiles",
+                [chat.roomId, model.id],
+                // The if avoids segfault if eventDelegate is already destroyed
+                () => { if (eventDelegate) fetchProfilesFutureId = "" }
+            )
+        // Workaround for hiding messages of certain types
+        if (!eventDelegate.visible)
+            eventDelegate.height = 0
+    }
 
     Component.onDestruction:
         if (fetchProfilesFutureId) py.cancelCoro(fetchProfilesFutureId)

src/gui/Pages/Chat/Timeline/EventList.qml

@@ -266,10 +266,28 @@ Rectangle {
             highlightRangeMode = previous
         }
 
+        function focusPreviousVisibleMessage() {
+            incrementCurrentIndex()
+            let lastIndex = -1
+            while ( currentIndex != lastIndex && model.get(currentIndex).hidden ) {
+                lastIndex = currentIndex
+                incrementCurrentIndex()
+            }
+        }
+
         function focusPreviousMessage() {
             currentIndex === -1 && visibleEnd.y < contentHeight - height / 4 ?
             focusCenterMessage() :
-            incrementCurrentIndex()
+            focusPreviousVisibleMessage()
+        }
+
+        function focusNextVisibleMessage() {
+            decrementCurrentIndex()
+            while ( currentIndex > -1 && model.get(currentIndex).hidden ) {
+                if ( currentIndex === 0 )
+                    currentIndex = -1;
+                decrementCurrentIndex()
+            }
         }
 
         function focusNextMessage() {
@@ -279,7 +297,7 @@ Rectangle {
             eventList.currentIndex === 0 ?
             eventList.currentIndex = -1 :
 
-            decrementCurrentIndex()
+            focusNextVisibleMessage()
         }
 
         function copySelectedDelegates() {
@@ -332,7 +350,7 @@ Rectangle {
         }
 
         function canCombine(item, itemAfter) {
-            if (! item || ! itemAfter) return false
+            if (! item || ! itemAfter || item.hidden) return false
 
             return Boolean(
                 ! canTalkBreak(item, itemAfter) &&

src/gui/Pages/Chat/Timeline/HistoryContent.qml

@@ -0,0 +1,260 @@
+// Copyright Mirage authors & contributors <https://github.com/mirukana/mirage>
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import QtQuick.Layouts 1.12
+import "../../../Base"
+import "../../.."
+
+HRowLayout {
+    id: historyContent
+
+    readonly property var mentions: []
+
+    readonly property string mentionsCSS: {
+        const lines = []
+
+        for (const [name, link] of mentions) {
+            if (! link.match(/^https?:\/\/matrix.to\/#\/@.+/)) continue
+
+            lines.push(
+                `.mention[data-mention='${utils.escapeHtml(name)}'] ` +
+                `{ color: ${utils.nameColor(name)} }`
+            )
+        }
+
+        return "<style type='text/css'>" + lines.join("\n") + "</style>"
+    }
+    readonly property string diffCSS: {
+        const lines = [
+            "del { background-color: #f8d7da; color: #721c24; text-decoration: line-through; }",
+            "ins { background-color: #d4edda; color: #155724; text-decoration: underline; }",
+        ]
+        return "<style type='text/css'>" + lines.join("\n") + "</style>"
+    }
+
+
+    readonly property string senderText: ""
+    property string contentText: model.content_diff
+    readonly property string timeText: utils.formatTime(model.date, false)
+
+    readonly property bool pureMedia: false
+
+    readonly property bool hoveredSelectable: contentHover.hovered
+    readonly property string hoveredLink:
+        linksRepeater.lastHovered && linksRepeater.lastHovered.hovered ?
+        linksRepeater.lastHovered.mediaUrl :
+        contentLabel.hoveredLink
+
+    readonly property alias contentLabel: contentLabel
+
+    readonly property int xOffset: 0
+
+    readonly property int maxMessageWidth:
+        contentText.includes("<pre>") || contentText.includes("<table>") ?
+        -1 :
+        window.settings.Chat.max_messages_line_length < 0 ?
+        -1 :
+        Math.ceil(
+            mainUI.fontMetrics.averageCharacterWidth *
+            window.settings.Chat.max_messages_line_length
+        )
+
+    readonly property alias selectedText: contentLabel.selectedPlainText
+
+    spacing: theme.chat.message.horizontalSpacing
+    layoutDirection: Qt.LeftToRight
+
+    HColumnLayout {
+        id: contentColumn
+
+        Layout.fillWidth: true
+        Layout.alignment: Qt.AlignVCenter
+
+        HSelectableLabel {
+            id: contentLabel
+            visible: ! pureMedia
+            enableLinkActivation: ! historyList.selectedCount
+
+            selectByMouse:
+                historyList.selectedCount <= 1 &&
+                historyDelegate.checked &&
+                textSelectionBlocker.point.scenePosition === Qt.point(0, 0)
+
+            topPadding: theme.chat.message.verticalSpacing
+            bottomPadding: topPadding
+            leftPadding: historyContent.spacing
+            rightPadding: leftPadding
+
+            color: theme.chat.message.body
+
+            font.italic: false
+            wrapMode: TextEdit.Wrap
+            textFormat: Text.RichText
+            text:
+                // CSS
+                theme.chat.message.styleInclude + mentionsCSS + diffCSS +
+
+                // Sender name & message body
+                (
+                    compact && contentText.match(/^\s*<(p|h[1-6])>/) ?
+                    contentText.replace(
+                        /(^\s*<(p|h[1-6])>)/, "$1" + senderText,
+                    ) :
+                    senderText + contentText
+                ) +
+
+                // Time
+                // For some reason, if there's only one space,
+                // times will be on their own lines most of the time.
+                "  " +
+                `<font size=${theme.fontSize.small}px ` +
+                      `color=${theme.chat.message.date}>` +
+                timeText +
+                "</font>"
+
+            transform: Translate { x: xOffset }
+
+            Layout.maximumWidth: historyContent.maxMessageWidth
+            Layout.fillWidth: true
+
+            onSelectedTextChanged: if (selectedPlainText) {
+                historyList.delegateWithSelectedText = model.id
+                historyList.selectedText             = selectedPlainText
+            } else if (historyList.delegateWithSelectedText === model.id) {
+                historyList.delegateWithSelectedText = ""
+                historyList.selectedText             = ""
+            }
+
+            Connections {
+                target: historyList
+                onCheckedChanged: contentLabel.deselect()
+                onDelegateWithSelectedTextChanged: {
+                    if (historyList.delegateWithSelectedText !== model.id)
+                        contentLabel.deselect()
+                }
+            }
+
+            HoverHandler { id: contentHover }
+
+            PointHandler {
+                id: mousePointHandler
+
+                property bool checkedNow: false
+
+                acceptedButtons: Qt.LeftButton
+                acceptedModifiers: Qt.NoModifier
+                acceptedPointerTypes:
+                    PointerDevice.GenericPointer | PointerDevice.Eraser
+
+                onActiveChanged: {
+                    if (active &&
+                            ! historyDelegate.checked &&
+                            (! parent.hoveredLink ||
+                            ! parent.enableLinkActivation)) {
+
+                        historyList.check(model.index)
+                        checkedNow = true
+                    }
+
+                    if (! active && historyDelegate.checked) {
+                        checkedNow ?
+                        checkedNow = false :
+                        historyList.uncheck(model.index)
+                    }
+                }
+            }
+
+            PointHandler {
+                id: mouseShiftPointHandler
+                acceptedButtons: Qt.LeftButton
+                acceptedModifiers: Qt.ShiftModifier
+                acceptedPointerTypes:
+                    PointerDevice.GenericPointer | PointerDevice.Eraser
+
+                onActiveChanged: {
+                    if (active &&
+                            ! historyDelegate.checked &&
+                            (! parent.hoveredLink ||
+                            ! parent.enableLinkActivation)) {
+
+                        historyList.checkFromLastToHere(model.index)
+                    }
+                }
+            }
+
+            TapHandler {
+                id: touchTapHandler
+                acceptedButtons: Qt.LeftButton
+                acceptedPointerTypes: PointerDevice.Finger | PointerDevice.Pen
+                onTapped:
+                    if (! parent.hoveredLink || ! parent.enableLinkActivation)
+                        historyDelegate.toggleChecked()
+            }
+
+            TapHandler {
+                id: textSelectionBlocker
+                acceptedPointerTypes: PointerDevice.Finger | PointerDevice.Pen
+            }
+
+            Rectangle {
+                id: contentBackground
+                width: Math.max(
+                    parent.paintedWidth +
+                    parent.leftPadding + parent.rightPadding,
+
+                    linksRepeater.summedWidth +
+                    (pureMedia ? 0 : parent.leftPadding + parent.rightPadding),
+                )
+                height: contentColumn.height
+                radius: theme.chat.message.radius
+                z: -100
+                color: historyDelegate.checked &&
+                       ! contentLabel.selectedPlainText &&
+                       ! mousePointHandler.active &&
+                       ! mouseShiftPointHandler.active ?
+                       theme.chat.message.checkedBackground :
+
+                       theme.chat.message.background
+            }
+        }
+
+        HRepeater {
+            id: linksRepeater
+
+            property EventMediaLoader lastHovered: null
+
+            model: {
+                const links = historyDelegate.currentModel.links
+
+                if (historyDelegate.currentModel.media_url)
+                    links.push(historyDelegate.currentModel.media_url)
+
+                return links
+            }
+
+            EventMediaLoader {
+                singleMediaInfo: historyDelegate.currentModel
+                mediaUrl: modelData
+                showSender: pureMedia ? senderText : ""
+                showDate: pureMedia ? timeText : ""
+                showLocalEcho: pureMedia && (
+                    singleMediaInfo.is_local_echo ||
+                    singleMediaInfo.read_by_count
+                ) ? stateText : ""
+
+                transform: Translate { x: xOffset }
+
+                onHoveredChanged: if (hovered) linksRepeater.lastHovered = this
+
+                Layout.bottomMargin: pureMedia ? 0 : contentLabel.bottomPadding
+                Layout.leftMargin: pureMedia ? 0 : historyContent.spacing
+                Layout.rightMargin: pureMedia ? 0 : historyContent.spacing
+                Layout.preferredWidth: item ? item.width : -1
+                Layout.preferredHeight: item ? item.height : -1
+            }
+        }
+    }
+
+    HSpacer {}
+}

src/gui/Pages/Chat/Timeline/HistoryDelegate.qml

@@ -0,0 +1,93 @@
+// Copyright Mirage authors & contributors <https://github.com/mirukana/mirage>
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import QtQuick.Layouts 1.12
+import Clipboard 0.1
+import "../../.."
+import "../../../Base"
+
+HColumnLayout {
+    id: historyDelegate
+
+    // Remember timeline goes from newest message at index 0 to oldest
+    readonly property var previousModel: historyList.model.get(model.index + 1)
+    readonly property var nextModel: historyList.model.get(model.index - 1)
+    readonly property QtObject currentModel: model
+
+    readonly property bool isFocused: model.index === historyList.currentIndex
+
+    readonly property bool compact: window.settings.General.compact
+    readonly property bool checked: model.id in historyList.checked
+    readonly property bool isOwn: true
+    readonly property bool isRedacted: false
+    readonly property bool onRight: ! historyList.ownEventsOnLeft && isOwn
+    readonly property bool combine: false
+    readonly property bool talkBreak: false
+    readonly property bool dayBreak:
+        model.index === 0 ? true : historyList.canDayBreak(previousModel, model)
+
+    readonly property bool hideNameLine: true
+
+    readonly property int cursorShape:
+        historyContent.hoveredLink ? Qt.PointingHandCursor :
+        historyContent.hoveredSelectable ? Qt.IBeamCursor :
+        Qt.ArrowCursor
+
+    readonly property int separationSpacing: theme.spacing * (
+        dayBreak  ? 4 :
+        talkBreak ? 6 :
+        combine && compact ? 0.25 :
+        combine ? 0.5 :
+        compact ? 1 :
+        2
+    )
+
+    readonly property alias historyContent: historyContent
+
+    function toggleChecked() {
+        historyList.toggleCheck(model.index)
+    }
+
+    width: historyList.width - historyList.leftMargin - historyList.rightMargin
+
+    // Needed because of historyList's MouseArea which steals the
+    // HSelectableLabel's MouseArea hover events
+    onCursorShapeChanged: historyList.cursorShape = cursorShape
+
+    ListView.onRemove: historyList.uncheck(model.id)
+
+    DelegateTransitionFixer {}
+
+    Item {
+        Layout.fillWidth: true
+        visible: model.index !== 0
+        Layout.preferredHeight: separationSpacing
+    }
+
+    DayBreak {
+        visible: dayBreak
+
+        Layout.fillWidth: true
+        Layout.minimumWidth: parent.width
+        Layout.bottomMargin: separationSpacing
+    }
+
+    HistoryContent {
+        id: historyContent
+
+        Layout.fillWidth: true
+    }
+
+    TapHandler {
+        acceptedButtons: Qt.LeftButton
+        acceptedModifiers: Qt.NoModifier
+        onTapped: toggleChecked()
+    }
+
+    TapHandler {
+        acceptedButtons: Qt.LeftButton
+        acceptedModifiers: Qt.ShiftModifier
+        onTapped: historyList.checkFromLastToHere(model.index)
+    }
+}

src/gui/Pages/Chat/Timeline/HistoryList.qml

@@ -0,0 +1,206 @@
+// Copyright Mirage authors & contributors <https://github.com/mirukana/mirage>
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import QtQuick.Layouts 1.12
+import QtQuick.Window 2.12
+import Clipboard 0.1
+import "../../.."
+import "../../../Base"
+import "../../../PythonBridge"
+import "../../../ShortcutBundles"
+
+Rectangle {
+
+    readonly property alias historyList: historyList
+
+    color: theme.chat.eventList.background
+
+    HShortcut {
+        sequences: window.settings.Keys.Messages.unfocus_or_deselect
+        onActivated: {
+            historyList.selectedCount ?
+            historyList.checked = {} :
+            historyList.currentIndex = -1
+        }
+    }
+
+    HShortcut {
+        sequences: window.settings.Keys.Messages.previous
+        onActivated: historyList.focusPreviousMessage()
+    }
+
+    HShortcut {
+        sequences: window.settings.Keys.Messages.next
+        onActivated: historyList.focusNextMessage()
+    }
+
+    HShortcut {
+        active: historyList.currentItem
+        sequences: window.settings.Keys.Messages.select
+        onActivated: historyList.toggleCheck(historyList.currentIndex)
+    }
+
+    HShortcut {
+        active: historyList.currentItem
+        sequences: window.settings.Keys.Messages.select_until_here
+        onActivated:
+            historyList.checkFromLastToHere(historyList.currentIndex)
+    }
+
+    HShortcut {
+        sequences: window.settings.Keys.Messages.open_links_files
+        onActivated: {
+            const indice =
+                historyList.getFocusedOrSelectedOrLastMediaEvents(true)
+
+            for (const i of Array.from(indice).sort().reverse()) {
+                const event = historyList.model.get(i)
+
+                for (const url of JSON.parse(event.links)) {
+                    utils.getLinkType(url) === Utils.Media.Image ?
+                    historyList.openImageViewer(event, url) :
+                    Qt.openUrlExternally(url)
+                }
+            }
+        }
+    }
+
+    HShortcut {
+        sequences: window.settings.Keys.Messages.open_links_files_externally
+        onActivated: {
+            const indice =
+                historyList.getFocusedOrSelectedOrLastMediaEvents(true)
+
+            for (const i of Array.from(indice).sort().reverse()) {
+                const event = historyList.model.get(i)
+
+                for (const url of JSON.parse(event.links))
+                    Qt.openUrlExternally(url)
+            }
+        }
+    }
+
+    HListView {
+        id: historyList
+
+        property bool ownEventsOnLeft: false
+
+        property string delegateWithSelectedText: ""
+        property string selectedText: ""
+
+        property bool showFocusedSeenTooltips: false
+
+        property alias cursorShape: cursorShapeArea.cursorShape
+
+        function focusCenterMessage() {
+            const previous     = highlightRangeMode
+            highlightRangeMode = HListView.NoHighlightRange
+            currentIndex       = indexAt(0, contentY + height / 2)
+            highlightRangeMode = previous
+        }
+
+        function focusPreviousMessage() {
+            currentIndex === -1 && visibleEnd.y < contentHeight - height / 4 ?
+            focusCenterMessage() :
+            incrementCurrentIndex()
+        }
+
+        function focusNextMessage() {
+            currentIndex === -1 && visibleEnd.y < contentHeight - height / 4 ?
+            focusCenterMessage() :
+
+            historyList.currentIndex === 0 ?
+            historyList.currentIndex = -1 :
+
+            decrementCurrentIndex()
+        }
+
+        function copySelectedDelegates() {
+            if (historyList.selectedText) {
+                Clipboard.text = historyList.selectedText
+                return
+            }
+
+            if (! historyList.selectedCount && historyList.currentIndex !== -1) {
+                const model  = historyList.model.get(historyList.currentIndex)
+                const source = JSON.parse(model.source)
+
+                Clipboard.text =
+                    model.media_http_url &&
+                    utils.isEmptyObject(JSON.parse(model.media_crypt_dict)) ?
+                    model.media_http_url :
+
+                    "body" in source ?
+                    source.body :
+
+                    utils.stripHtmlTags(utils.processedEventText(model))
+
+                return
+            }
+
+            const contents = []
+
+            for (const model of historyList.getSortedChecked()) {
+                const source = JSON.parse(model.source)
+
+                contents.push(
+                    model.media_http_url &&
+                    utils.isEmptyObject(JSON.parse(model.media_crypt_dict)) ?
+                    model.media_http_url :
+
+                    "body" in source ?
+                    source.body :
+
+                    utils.stripHtmlTags(utils.processedEventText(model))
+                )
+            }
+
+            Clipboard.text = contents.join("\n\n")
+        }
+
+        function canDayBreak(item, itemAfter) {
+            if (! item || ! itemAfter || ! item.date || ! itemAfter.date)
+                return false
+
+            return item.date.getDate() !== itemAfter.date.getDate()
+        }
+
+        function getFocusedOrSelectedOrLastMediaEvents(acceptLinks=false) {
+            if (historyList.selectedCount) return historyList.checkedIndice
+            if (historyList.currentIndex !== -1) return [historyList.currentIndex]
+
+            // Find most recent event that's a media or contains links
+            for (let i = 0; i < historyList.model.count && i <= 1000; i++) {
+                const ev    = historyList.model.get(i)
+                const links = JSON.parse(ev.links)
+
+                if (ev.media_url || (acceptLinks && links.length)) return [i]
+            }
+        }
+
+        anchors.fill: parent
+        clip: true
+        keyNavigationWraps: false
+        leftMargin: theme.spacing
+        rightMargin: theme.spacing
+        topMargin: theme.spacing
+        bottomMargin: theme.spacing
+
+        // model: ModelStore.get(chat.userRoomId[0], chat.userRoomId[1], "events")
+        model: []
+        delegate: HistoryDelegate {}
+
+        highlight: Rectangle {
+            color: theme.chat.message.focusedHighlight
+            opacity: theme.chat.message.focusedHighlightOpacity
+        }
+
+        MouseArea {
+            id: cursorShapeArea
+            anchors.fill: parent
+            acceptedButtons: Qt.NoButton
+        }
+
+    }
+}

src/gui/Popups/MessageReplaceHistoryPopup.qml

@@ -0,0 +1,44 @@
+// Copyright Mirage authors & contributors <https://github.com/mirukana/mirage>
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import QtQuick.Controls 2.12
+import QtQuick.Layouts 1.12
+import "../Base"
+import "../Base/Buttons"
+import "../Pages/Chat/Timeline"
+
+HColumnPopup {
+    id: popup
+
+    contentWidthLimit:
+        window.settings.Chat.max_messages_line_length < 0 ?
+        theme.controls.popup.defaultWidth * 2 :
+        Math.ceil(
+            mainUI.fontMetrics.averageCharacterWidth *
+            window.settings.Chat.max_messages_line_length
+        )
+    property var contentHistory
+
+    page.footer: AutoDirectionLayout {
+        CancelButton {
+            id: cancelButton
+            onClicked: popup.close()
+        }
+    }
+
+    onOpened: cancelButton.forceActiveFocus()
+
+    SummaryLabel {
+        text: qsTr("Message History")
+        textFormat: Text.StyledText
+    }
+
+    HistoryList {
+        id: historyList
+        historyList.model: contentHistory
+        height: 400
+        Layout.fillWidth: true
+        Layout.fillHeight: true
+    }
+}

src/gui/Utils.qml

@@ -11,13 +11,13 @@ QtObject {
     property bool keyboardFlicking: false
 
     readonly property var imageExtensions: [
-		"bmp", "gif", "jpg", "jpeg", "png", "pbm", "pgm", "ppm", "xbm", "xpm",
-		"tiff", "webp", "svg",
+        "bmp", "gif", "jpg", "jpeg", "png", "pbm", "pgm", "ppm", "xbm", "xpm",
+        "tiff", "webp", "svg",
     ]
 
     readonly property var videoExtensions: [
         "3gp", "avi", "flv", "m4p", "m4v", "mkv", "mov", "mp4",
-		"mpeg", "mpg", "ogv", "qt", "vob", "webm", "wmv", "yuv",
+        "mpeg", "mpg", "ogv", "qt", "vob", "webm", "wmv", "yuv",
     ]
 
     readonly property var audioExtensions: [
@@ -214,6 +214,31 @@ QtObject {
         const unknownMsg = type === "RoomMessageUnknown"
         const sender     = coloredNameHtml(ev.sender_name, ev.sender_id)
 
+        if (ev.type_specifier === "Reaction") {
+            let name = coloredNameHtml(
+                ev.sender_name, ev.sender_id, "", true,
+            )
+            let reaction = ev.content
+
+            return qsTr(
+                `<font color="${theme.chat.message.noticeBody}">` +
+                name + ": " + reaction +
+                "</font>"
+            )
+        }
+        if (ev.type_specifier === "ReactionRedaction") {
+            let name = coloredNameHtml(
+                ev.sender_name, ev.sender_id, "", true,
+            )
+            let reaction = ev.content
+
+            return qsTr(
+                `<font color="${theme.chat.message.noticeBody}">` +
+                name + " removed a reaction" +
+                "</font>"
+            )
+        }
+
         if (type === "RoomMessageEmote")
             return ev.content.match(/^\s*<(p|h[1-6])>/) ?
                    ev.content.replace(/(^\s*<(p|h[1-6])>)/, `$1${sender} `) :

src/main.cpp

@@ -367,7 +367,7 @@ int main(int argc, char *argv[]) {
     QApplication::setOrganizationName("moment");
     QApplication::setApplicationName("moment");
     QApplication::setApplicationDisplayName("Moment");
-    QApplication::setApplicationVersion("0.7.3");
+    QApplication::setApplicationVersion("0.7.5");
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 
     // app needs to be constructed before attempting to migrate