Rooms and threads fixes

- Fix roomList height again, now based on model.count().
  All delegates are assumed to be the same height

- Properly update room list when a room is joined or left

- Catch exceptions happening in threads (futures), which previously
  passed silently

- Show "Empty room?" as "<i>Empty Room</i>" + gray [?] avatar

harmonyqml/backend/client.py

@@ -2,8 +2,11 @@
 # This file is part of harmonyqml, licensed under GPLv3.
 
 import functools
+import logging
+import sys
+import traceback
 from concurrent.futures import Future, ThreadPoolExecutor
-from threading import Event
+from threading import Event, currentThread
 from typing import Callable, DefaultDict, Dict
 
 from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal, pyqtSlot
@@ -22,7 +25,16 @@ _POOLS: DefaultDict[str, ThreadPoolExecutor] = \
 def futurize(func: Callable) -> Callable:
     @functools.wraps(func)
     def wrapper(*args, **kwargs) -> Future:
-        return args[0].pool.submit(func, *args, **kwargs)  # args[0] = self
+        def run_and_catch_errs():
+            # Without this, exceptions are silently ignored
+            try:
+                func(*args, **kwargs)
+            except Exception:
+                traceback.print_exc()
+                logging.error("Exiting %s due to exception.", currentThread())
+                sys.exit(1)
+
+        return args[0].pool.submit(run_and_catch_errs)  # args[0] = self
     return wrapper
 
 
@@ -91,7 +103,7 @@ class Client(QObject):
     @futurize
     def startSyncing(self) -> None:
         while True:
-            self._on_sync(self.net.talk(self.nio.sync, timeout=10))
+            self._on_sync(self.net.talk(self.nio.sync, timeout=10_000))
 
             if self._stop_sync.is_set():
                 self._stop_sync.clear()
@@ -105,7 +117,7 @@ class Client(QObject):
         for room_id in response.rooms.join:
             self.roomJoined.emit(room_id)
 
-        for room_id in response.rooms.left:
+        for room_id in response.rooms.leave:
             self.roomLeft.emit(room_id)
 
 

harmonyqml/backend/model/items.py

@@ -17,7 +17,7 @@ class User(NamedTuple):
 
 class Room(NamedTuple):
     room_id:                    str
-    display_name:               str
+    display_name:               Optional[str]
     description:                str           = ""
     unread_messages:            int           = 0
     presence:                   Presence      = Presence.none

harmonyqml/backend/model/list_model.py

@@ -129,7 +129,7 @@ class ListModel(QAbstractListModel):
 
     @pyqtSlot(int, list)
     def set(self, index: int, value: NewValue) -> None:
-        qidx              = QAbstractListModel.index(index, 0)
+        qidx              = QAbstractListModel.index(self, index, 0)
         value             = self._convert_new_value(value)
         self._list[index] = value
         self.dataChanged.emit(qidx, qidx, self.roleNames())
@@ -139,7 +139,7 @@ class ListModel(QAbstractListModel):
     @pyqtSlot(int, str, "QVariant")
     def setProperty(self, index: int, prop: str, value: Any) -> None:
         self._list[index][self._roles.index(prop)] = value
-        qidx = QAbstractListModel.index(index, 0)
+        qidx = QAbstractListModel.index(self, index, 0)
         self.dataChanged.emit(qidx, qidx, self.roleNames())
         self._update_count += 1
 

harmonyqml/backend/network_manager.py

@@ -85,14 +85,12 @@ class NetworkManager:
             except NioErrorResponse as err:
                 logging.error("read bad response for %s: %s", nio_func, err)
                 self._close_socket(sock)
+
                 if self._should_abort_talk(err):
                     logging.error("aborting talk")
                     break
-                time.sleep(10)
 
-            except Exception as err:
+                time.sleep(10)
-                logging.error("talk exception for %s: %r", nio_func, err)
-                break
 
             else:
                 break

harmonyqml/backend/signal_manager.py

@@ -1,11 +1,13 @@
 # Copyright 2019 miruka
 # This file is part of harmonyqml, licensed under GPLv3.
 
+from typing import Optional
+
 from PyQt5.QtCore import QObject
 
 from .backend import Backend
 from .client import Client
-from .model.items import User, Room
+from .model.items import Room, User
 
 
 class SignalManager(QObject):
@@ -43,14 +45,25 @@ class SignalManager(QObject):
 
 
     def onRoomJoined(self, client: Client, room_id: str) -> None:
-        room = client.nio.rooms[room_id]
+        model = self.backend.models.rooms[client.userID]
-        name = room.name or room.canonical_alias or room.group_name()
+        room  = client.nio.rooms[room_id]
 
-        self.backend.models.rooms[client.userID].append(Room(
+        def group_name() -> Optional[str]:
+            name = room.group_name()
+            return None if name == "Empty room?" else name
+
+        item = Room(
             room_id      = room_id,
-            display_name = name,
+            display_name = room.name or room.canonical_alias or group_name(),
             description  = getattr(room, "topic", ""),  # FIXME: outside init
-        ))
+        )
+
+        try:
+            index = model.indexWhere("room_id", room_id)
+        except ValueError:
+            model.append(item)
+        else:
+            model[index] = item
 
 
     def onRoomLeft(self, client: Client, room_id: str) -> None:

harmonyqml/components/base/Avatar.qml

@@ -4,7 +4,7 @@ import QtQuick.Layouts 1.4
 
 Item {
     property bool invisible: false
-    property string name: "?"
+    property var name: null
     property var imageSource: null
     property int dimmension: 48
 
@@ -16,11 +16,13 @@ Item {
         id: "letterRectangle"
         anchors.fill: parent
         visible: ! invisible && imageSource === null
-        color: Qt.hsla(Backend.hueFromString(name), 0.22, 0.5, 1)
+        color: name ?
+               Qt.hsla(Backend.hueFromString(name), 0.22, 0.5, 1) :
+               Qt.hsla(0, 0, 0.22, 1)
 
         HLabel {
             anchors.centerIn: parent
-            text: name.charAt(0)
+            text: name ? name.charAt(0) : "?"
             color: "white"
             font.pixelSize: letterRectangle.height / 1.4
         }

harmonyqml/components/side_pane/RoomDelegate.qml

@@ -6,7 +6,7 @@ import "../base" as Base
 MouseArea {
     id: "root"
     width: roomList.width
-    height: Math.max(roomLabel.height + subtitleLabel.height, avatar.height)
+    height: roomList.childrenHeight
 
     onClicked: pageStack.show_room(
         roomList.user_id,
@@ -18,14 +18,15 @@ MouseArea {
         id: row
         spacing: 1
 
-        Base.Avatar { id: avatar; name: display_name; dimmension: 36 }
+        Base.Avatar { id: avatar; name: display_name; dimmension: root.height }
 
         ColumnLayout {
             spacing: 0
 
             Base.HLabel {
                 id: roomLabel
-                text: display_name
+                text: display_name ? display_name : "<i>Empty room</i>"
+                textFormat: Text.StyledText
                 elide: Text.ElideRight
                 maximumLineCount: 1
                 Layout.maximumWidth: row.width - row.spacing - avatar.width
@@ -37,11 +38,12 @@ MouseArea {
                 rightPadding: leftPadding
             }
             Base.HLabel {
-                function get_text() {
+                property var msgModel: Backend.models.messages.get(room_id)
-                    var msgs = Backend.models.messages.get(room_id)
-                    if (! msgs || msgs.count < 1) { return "" }
 
-                    var msg = msgs.get(-1)
+                function get_text() {
+                    if (msgModel.count < 1) { return "" }
+
+                    var msg = msgModel.get(-1)
                     var color_ = (msg.sender_id === roomList.user_id ?
                                   "darkblue" : "purple")
                     var client = Backend.clientManager.clients[RoomList.for_user_id]
@@ -54,7 +56,7 @@ MouseArea {
 
                 id: subtitleLabel
                 visible: text !== ""
-                text: Backend.models.messages.get(room_id).reloadThis, get_text()
+                text: msgModel.reloadThis, get_text()
                 textFormat: Text.StyledText
 
                 font.pixelSize: smallSize

harmonyqml/components/side_pane/RoomList.qml

@@ -6,17 +6,12 @@ import "../base" as Base
 ListView {
     property var for_user_id: null
 
+    property int childrenHeight: 36
     property int contentHeight: 0
 
     onCountChanged: {
-        var children = roomList.contentItem.children
+        contentHeight = childrenHeight * model.count +
-        var childrenHeight = 0
+                        spacing * (model.count - 1)
-
-        for (var i = 0; i < children.length; i++) {
-            childrenHeight += children[i].height
-        }
-
-        contentHeight = childrenHeight + spacing * (children.length - 1)
     }
 
     id: "roomList"