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Use a component to display image link previews

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This commit is contained in:
miruka 2019-09-03 03:04:57 -04:00
parent 3c4ca7d433
commit 5674d0c7b7
10 changed files with 147 additions and 100 deletions
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6
TODO.md
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@ -11,6 +11,7 @@
- When qml syntax highlighting supports ES6 string interpolation, use them
- Fixes
- Scroll to begin/end
- `minutesBetween()` for 13:13:58 and 14:15:07
- `# > quote` doesn't color
- Pressing backspace in composer sometimes doesn't work
@ -29,6 +30,7 @@
- Verify big avatars aren't downloaded uselessly
- UI
- Esc in sidepane to focus chat again
- Set an explicit placeholder text color for text field/area
- Change typing bar background
- Show error if uploading avatar fails or file is corrupted
@ -38,8 +40,8 @@
- Message selection
- Make scroll wheel usable
- Copy to X11 selection
- Make events copiable
- Images don't load correctly in TextEdit
- Link previews
- Take the previews into account to calculate delegate min height
- Just use Shortcut onHeld instead of analyzing the current velocity
in `smartVerticalFlick()`

1
src/python/config_files.py
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@ -105,6 +105,7 @@ class UISettings(JSONConfigFile):
async def default_data(self) -> JsonData:
return {
"alertOnMessageForMsec": 4000,
"messageImageMaxThumbnailSize": 256,
"theme": "Default.qpl",
"writeAliases": {},
"keys": {

68
src/python/html_filter.py
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@ -1,7 +1,7 @@
import re
import mistune
from lxml.html import HtmlElement, etree # nosec
from lxml.html import HtmlElement # nosec
import html_sanitizer.sanitizer as sanitizer
from html_sanitizer.sanitizer import Sanitizer
@ -66,39 +66,22 @@ class HtmlFilter:
if outgoing:
return html
tree = etree.fromstring(html, parser=etree.HTMLParser())
if tree is None:
return ""
for el in tree.iter("img"):
el = self._wrap_img_in_a(el)
for el in tree.iter("a"):
el = self._append_img_to_a(el)
result = b"".join((etree.tostring(el, encoding="utf-8")
for el in tree[0].iterchildren()))
text = str(result, "utf-8").strip("\n")
return re.sub(
r"<(p|br/?)>(\s*&gt;.*)(!?</?(?:br|p)/?>)",
r'<\1><span class="quote">\2</span>\3',
text,
html,
)
def sanitize_settings(self, inline: bool = False) -> dict:
# https://matrix.org/docs/spec/client_server/latest#m-room-message-msgtypes
# TODO: mx-reply, audio, video, the new hidden thing
# TODO: mx-reply and the new hidden thing
inline_tags = {"font", "a", "sup", "sub", "b", "i", "s", "u", "code"}
tags = inline_tags | {
"h1", "h2", "h3", "h4", "h5", "h6","blockquote",
"p", "ul", "ol", "li", "hr", "br",
"table", "thead", "tbody", "tr", "th", "td",
"pre", "img",
"table", "thead", "tbody", "tr", "th", "td", "pre",
}
inlines_attributes = {
@ -107,7 +90,6 @@ class HtmlFilter:
"code": {"class"},
}
attributes = {**inlines_attributes, **{
"img": {"width", "height", "alt", "title", "src"},
"ol": {"start"},
"hr": {"width"},
}}
@ -115,7 +97,7 @@ class HtmlFilter:
return {
"tags": inline_tags if inline else tags,
"attributes": inlines_attributes if inline else attributes,
"empty": {} if inline else {"hr", "br", "img"},
"empty": {} if inline else {"hr", "br"},
"separate": {"a"} if inline else {
"a", "p", "li", "table", "tr", "th", "td", "br", "hr",
},
@ -139,6 +121,7 @@ class HtmlFilter:
sanitizer.tag_replacer("caption", "p"),
sanitizer.target_blank_noopener,
self._process_span_font,
self._img_to_a,
],
"element_postprocessors": [],
"is_mergeable": lambda e1, e2: e1.attrib == e2.attrib,
@ -159,42 +142,13 @@ class HtmlFilter:
@staticmethod
def _wrap_img_in_a(el: HtmlElement) -> HtmlElement:
link = el.attrib.get("src", "")
width = el.attrib.get("width", "256")
height = el.attrib.get("height", "256")
def _img_to_a(el: HtmlElement) -> HtmlElement:
if el.tag == "img":
el.tag = "a"
el.attrib["href"] = el.attrib.pop("src", "")
el.text = el.attrib.pop("alt", None) or el.attrib["href"]
if el.getparent().tag == "a" or el.tag != "img":
return el
el.tag = "a"
el.attrib.clear()
el.attrib["href"] = link
el.append(etree.Element("img", src=link, width=width, height=height))
return el
def _append_img_to_a(self, el: HtmlElement) -> HtmlElement:
link = el.attrib.get("href", "")
if not (el.tag == "a" and self._is_image_path(link)):
return el
for _ in el.iter("img"): # if the <a> already has an <img> child
return el
el.append(etree.Element("br"))
el.append(etree.Element("img", src=link, width="256", height="256"))
return el
@staticmethod
def _is_image_path(link: str) -> bool:
return bool(re.match(
r"(https?|s?ftp)://.+/.+\.(jpg|jpeg|png|gif|bmp|webp|tiff|svg)$",
link,
re.IGNORECASE,
))
HTML_FILTER = HtmlFilter()

24
src/python/models/items.py
View File

@ -2,6 +2,9 @@ import re
from dataclasses import dataclass, field
from datetime import datetime
from typing import Any, Dict, List, Optional, Tuple
from urllib.parse import urlparse
import lxml # nosec
import nio
@ -145,6 +148,27 @@ class Event(ModelItem):
def event_type(self) -> str:
return self.local_event_type or type(self.source).__name__
@property
def preview_links(self) -> List[Tuple[str, str]]:
if not self.content.strip():
return []
return [
(self._get_preview_type(link[0], link[2]), link[2])
for link in lxml.html.iterlinks(self.content)
]
@staticmethod
def _get_preview_type(el: lxml.html.HtmlElement, link: str) -> str:
path = urlparse(link).path.lower()
for ext in ("jpg", "jpeg", "png", "gif", "bmp", "webp", "tiff", "svg"):
if el.tag == "img" or path.endswith(ext):
return "image"
return "page"
@dataclass
class Device(ModelItem):

4
src/qml/Base/HButton.qml
View File

@ -5,10 +5,10 @@ import QtQuick.Layouts 1.12
Button {
id: button
spacing: theme.spacing
leftPadding: spacing / (circle ? 1.5 : 1)
rightPadding: leftPadding
topPadding: spacing / (circle ? 1.75 : 1.5)
bottomPadding: topPadding
leftPadding: spacing / (circle ? 1.5 : 1)
rightPadding: leftPadding
iconItem.svgName: loading ? "hourglass" : icon.name
icon.color: theme.icons.colorize

1
src/qml/Base/HImage.qml
View File

@ -3,6 +3,7 @@ import QtGraphicalEffects 1.12
Image {
id: image
autoTransform: true
asynchronous: true
cache: true
fillMode: Image.PreserveAspectFit

52
src/qml/Chat/Timeline/EventContent.qml
View File

@ -7,7 +7,6 @@ Row {
id: eventContent
spacing: theme.spacing / 2
readonly property string eventText: Utils.processedEventText(model)
readonly property string eventTime: Utils.formatTime(model.date)
readonly property int eventTimeSpaces: 2
@ -29,8 +28,8 @@ Row {
HoverHandler { id: hover }
Item {
width: hideAvatar ? 0 : 48
height: hideAvatar ? 0 : collapseAvatar ? 1 : smallAvatar ? 28 : 48
width: hideAvatar ? 0 : 58
height: hideAvatar ? 0 : collapseAvatar ? 1 : smallAvatar ? 28 : 58
opacity: hideAvatar || collapseAvatar ? 0 : 1
visible: width > 0
@ -39,8 +38,8 @@ Row {
userId: model.sender_id
displayName: model.sender_name
avatarUrl: model.sender_avatar
width: hideAvatar ? 0 : 48
height: hideAvatar ? 0 : collapseAvatar ? 1 : 48
width: hideAvatar ? 0 : 58
height: hideAvatar ? 0 : collapseAvatar ? 1 : 58
}
}
@ -55,15 +54,18 @@ Row {
theme.fontSize.normal * 0.5 * 75, // 600 with 16px font
Math.max(
nameLabel.visible ? nameLabel.implicitWidth : 0,
contentLabel.implicitWidth
contentLabel.implicitWidth,
)
)
height: (nameLabel.visible ? nameLabel.height : 0) +
contentLabel.implicitHeight
height: childrenRect.height
y: parent.height / 2 - height / 2
Column {
anchors.fill: parent
id: mainColumn
width: parent.width
spacing: theme.spacing / 1.75
topPadding: theme.spacing / 1.75
bottomPadding: topPadding
HSelectableLabel {
id: nameLabel
@ -71,6 +73,8 @@ Row {
visible: ! hideNameLine
container: selectableLabelContainer
selectable: ! unselectableNameLine
leftPadding: eventContent.spacing
rightPadding: leftPadding
// This is +0.1 and content is +0 instead of the opposite,
// because the eventList is reversed
@ -81,10 +85,6 @@ Row {
// elide: Text.ElideRight
horizontalAlignment: onRight ? Text.AlignRight : Text.AlignLeft
leftPadding: theme.spacing
rightPadding: leftPadding
topPadding: theme.spacing / 2
function selectAllTextPlus() {
contentLabel.selectAllTextPlus()
}
@ -97,6 +97,10 @@ Row {
width: parent.width
container: selectableLabelContainer
index: model.index
leftPadding: eventContent.spacing
rightPadding: leftPadding
bottomPadding: previewLinksRepeater.count > 0 ?
mainColumn.bottomPadding : 0
text: theme.chat.message.styleInclude +
eventContent.eventText +
@ -115,12 +119,6 @@ Row {
wrapMode: Text.Wrap
textFormat: Text.RichText
leftPadding: theme.spacing
rightPadding: leftPadding
topPadding: nameLabel.visible ? 0 : bottomPadding
bottomPadding: theme.spacing / 2
function selectAllText() {
// Select the message body without the date or name
container.clearSelection()
@ -142,6 +140,22 @@ Row {
HoverHandler { id: contentHover }
}
Repeater {
id: previewLinksRepeater
model: previewLinks
HLoader {
Component.onCompleted: {
if (modelData[0] == "image") {
setSource(
"EventImage.qml",
{ source: modelData[1] },
)
}
}
}
}
}
}
}

56
src/qml/Chat/Timeline/EventDelegate.qml
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@ -1,9 +1,19 @@
import QtQuick 2.12
import QtQuick.Layouts 1.12
import "../../Base"
import "../../utils.js" as Utils
Column {
id: eventDelegate
width: eventList.width
topPadding:
model.event_type == "RoomCreateEvent" ? 0 :
dayBreak ? theme.spacing * 4 :
talkBreak ? theme.spacing * 6 :
combine ? theme.spacing / 2 :
theme.spacing * 2
// Remember timeline goes from newest message at index 0 to oldest
property var previousItem: eventList.model.get(model.index + 1)
@ -38,14 +48,9 @@ Column {
readonly property bool unselectableNameLine:
hideNameLine && ! (onRight && ! combine)
width: eventList.width
readonly property var previewLinks: model.preview_links
topPadding:
model.event_type == "RoomCreateEvent" ? 0 :
dayBreak ? theme.spacing * 4 :
talkBreak ? theme.spacing * 6 :
combine ? theme.spacing / 2 :
theme.spacing * 2
property string hoveredImage: ""
Daybreak {
@ -70,15 +75,8 @@ Column {
TapHandler {
acceptedButtons: Qt.RightButton
onTapped: {
contextMenu.link = eventContent.hoveredLink
contextMenu.popup()
}
}
TapHandler {
acceptedButtons: Qt.LeftButton | Qt.RightButton
onLongPressed: {
contextMenu.link = eventContent.hoveredLink
contextMenu.link = eventContent.hoveredLink
contextMenu.image = eventDelegate.hoveredImage
contextMenu.popup()
}
}
@ -87,8 +85,17 @@ Column {
id: contextMenu
property string link: ""
property string image: ""
onClosed: link = ""
onClosed: { link = ""; image = "" }
HMenuItem {
id: copyImage
icon.name: "copy-link"
text: qsTr("Copy image address")
visible: Boolean(contextMenu.image)
onTriggered: Utils.copyToClipboard(contextMenu.image)
}
HMenuItem {
id: copyLink
@ -101,12 +108,25 @@ Column {
HMenuItem {
icon.name: "copy-text"
text: qsTr("Copy text")
visible: enabled || ! copyLink.visible
visible: enabled || (! copyLink.visible && ! copyImage.visible)
enabled: Boolean(selectableLabelContainer.joinedSelection)
onTriggered:
Utils.copyToClipboard(selectableLabelContainer.joinedSelection)
}
HMenuItem {
icon.name: "settings"
text: qsTr("Print event item")
visible: debugMode
onTriggered: print(JSON.stringify(Utils.getItem(
modelSources[[
"Event", chatPage.userId, chatPage.roomId
]],
"client_id",
model.client_id
), null, 4))
}
HMenuItem {
icon.name: "settings"
text: qsTr("Set as debug console target")

31
src/qml/Chat/Timeline/EventImage.qml Normal file
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@ -0,0 +1,31 @@
import QtQuick 2.12
import "../../Base"
HImage {
id: image
x: eventContent.spacing
sourceSize.width: maxDimension
sourceSize.height: maxDimension
width: Math.min(
mainColumn.width - eventContent.spacing * 2,
implicitWidth,
maxDimension,
)
property int maxDimension: window.settings.messageImageMaxThumbnailSize
TapHandler {
onTapped: Qt.openUrlExternally(image.source)
}
HoverHandler {
id: hover
onHoveredChanged: eventDelegate.hoveredImage = hovered ? image.source : ""
}
MouseArea {
anchors.fill: image
acceptedButtons: Qt.NoButton
cursorShape: Qt.PointingHandCursor
}
}

2
src/qml/Chat/Timeline/EventList.qml
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@ -177,7 +177,7 @@ Rectangle {
}
HNoticePage {
text: qsTr("No messages visible yet.")
text: qsTr("No messages visible yet")
visible: eventList.model.count < 1
anchors.fill: parent