Disable composer/upload button when no permission

TODO.md

@@ -57,6 +57,7 @@
 
 - UI
   - Scrollable popup
+  - HDrawer snapping
   - Make theme error/etc text colors more like name colors
   - In account settings, display name field text should be colored
   - Way to open context menus without a right mouse button
@@ -103,8 +104,7 @@
 
   - Server selection
   - Register/Reset for AddAccount page
-  - Prevent using the composer if no permission (power levels)
-    - Prevent using an alias if that user is not in the room or no permission
+  - Prevent using an alias if that user is not in the room or no permission
   - Spinner when loading past room events
 
   - Theming

src/python/matrix_client.py

@@ -801,8 +801,9 @@ class MatrixClient(nio.AsyncClient):
         except KeyError:
             last_ev = None
 
-        inviter = getattr(room, "inviter", "") or ""
-        levels  = room.power_levels
+        inviter   = getattr(room, "inviter", "") or ""
+        levels    = room.power_levels
+        our_level = levels.get_user_level(self.user_id)
 
         self.models[Room, self.user_id][room.room_id] = Room(
             room_id        = room.room_id,
@@ -815,8 +816,8 @@ class MatrixClient(nio.AsyncClient):
                 (room.avatar_url(inviter) or "") if inviter else "",
             left           = left,
 
-            can_invite =
-                levels.users.get(self.user_id, 0) >= levels.defaults.invite,
+            can_invite        = our_level >= levels.defaults.invite,
+            can_send_messages = our_level >= levels.defaults.events_default,
 
             last_event = last_ev,
         )

src/python/models/items.py

@@ -47,7 +47,8 @@ class Room(ModelItem):
     left:           bool      = False
     typing_members: List[str] = field(default_factory=list)
 
-    can_invite: bool = True
+    can_invite:        bool = True
+    can_send_messages: bool = True
 
     # Event.serialized
     last_event: Optional[Dict[str, Any]] = field(default=None, repr=False)

src/qml/Base/HScrollableTextArea.qml

@@ -1,3 +1,4 @@
+
 import QtQuick 2.12
 import QtQuick.Controls 2.12
 
@@ -23,13 +24,17 @@ ScrollView {
 
     property alias backgroundColor: textAreaBackground.color
     property alias placeholderText: textArea.placeholderText
-    property alias text: textArea.text
+    property alias placeholderTextColor: textArea.placeholderTextColor
     property alias area: textArea
+    property alias text: textArea.text
+    property string disabledText: ""
+    property string disabledTextColor: theme.controls.textArea.disabledText
     property var focusItemOnTab: null
 
 
     TextArea {
         id: textArea
+        enabled: parent.enabled
         leftPadding: theme.spacing
         rightPadding: leftPadding
         topPadding: theme.spacing / 1.5
@@ -45,6 +50,7 @@ ScrollView {
 
         placeholderTextColor: theme.controls.textArea.placeholderText
         color: theme.controls.textArea.text
+
         background: Rectangle {
             id: textAreaBackground
             color: theme.controls.textArea.background
@@ -57,5 +63,37 @@ ScrollView {
 
         KeyNavigation.priority: KeyNavigation.BeforeItem
         KeyNavigation.tab: focusItemOnTab
+
+        Binding on color {
+            value: "transparent"
+            when: ! textArea.enabled
+        }
+
+        Binding on placeholderTextColor {
+            value: "transparent"
+            when: ! textArea.enabled
+        }
+
+        Behavior on color { HColorAnimation {} }
+        Behavior on placeholderTextColor { HColorAnimation {} }
+
+        HLabel {
+            anchors.fill: parent
+            visible: opacity > 0
+            opacity: parent.enabled ? 0 : 1
+            color: disabledTextColor
+            text: disabledText
+
+            leftPadding: parent.leftPadding
+            rightPadding: parent.rightPadding
+            topPadding: parent.topPadding
+            bottomPadding: parent.bottomPadding
+
+            wrapMode: parent.wrapMode
+            font.family: parent.font.family
+            font.pixelSize: parent.font.pixelSize
+
+            Behavior on opacity { HOpacityAnimator {} }
+        }
     }
 }

src/qml/Chat/Composer.qml

@@ -68,7 +68,11 @@ Rectangle {
             saveName: "composer"
             saveId: [chat.roomId, writingUserId]
 
+            enabled: chat.roomInfo.can_send_messages
+            disabledText:
+                qsTr("You do not have permission to post in this room")
             placeholderText: qsTr("Type a message...")
+
             backgroundColor: "transparent"
             area.tabStopDistance: 4 * 4  // 4 spaces
             area.focus: true
@@ -209,6 +213,7 @@ Rectangle {
         }
 
         HButton {
+            enabled: chat.roomInfo.can_send_messages
             icon.name: "upload-file"
             backgroundColor: theme.chat.composer.uploadButton.background
             toolTip.text: qsTr("Send files")

src/themes/Default.qpl

@@ -171,11 +171,13 @@ controls:
         color text:            colors.text
         color focusedText:     colors.text
         color placeholderText: colors.dimText
+        color disabledText:    colors.dimText
 
     textArea:
         color background:      colors.inputBackground
         color text:            colors.text
         color placeholderText: controls.textField.placeholderText
+        color disabledText:    controls.textField.disabledText
 
     toolTip:
         int delay:        500