Make power level control permission-aware

TODO.md

@@ -1,5 +1,12 @@
 # TODO
 
+- fix reply bar height
+- don't trust PowerLevelsEvent, may be old
+- joining new DM, not loading past events?
+- HLabeledItem disabled opacity
+- cancel setPowerLevel future on Cancel button click
+- enter to trigger apply button
+- destroy setPowerLevel future on Component.onDestruction
 - warn about setting level of someone to 100
 - gray out if no permission to change
 - improve event text

src/backend/matrix_client.py

@@ -1684,6 +1684,7 @@ class MatrixClient(nio.AsyncClient):
             guests_allowed     = room.guest_access == "can_join",
 
             default_power_level  = levels.defaults.users_default,
+            own_power_level      = levels.get_user_level(self.user_id),
             can_invite           = levels.can_user_invite(self.user_id),
             can_kick             = levels.can_user_kick(self.user_id),
             can_redact_all       = levels.can_user_redact(self.user_id),
@@ -1694,6 +1695,7 @@ class MatrixClient(nio.AsyncClient):
             can_set_encryption   = can_send_state("m.room.encryption"),
             can_set_join_rules   = can_send_state("m.room.join_rules"),
             can_set_guest_access = can_send_state("m.room.guest_access"),
+            can_set_power_levels = can_send_state("m.room.power_levels"),
 
             last_event_date = last_event_date,
 

src/backend/models/items.py

@@ -180,6 +180,7 @@ class Room(ModelItem):
     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
@@ -190,6 +191,7 @@ class Room(ModelItem):
     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
 

src/gui/Base/PowerLevelControl.qml

@@ -4,14 +4,21 @@ import QtQuick 2.12
 import QtQuick.Layouts 1.12
 
 AutoDirectionLayout {
-    id: control
+    id: root
 
     property int defaultLevel: 0
+    property int maximumLevel: 100
 
     readonly property alias changed: field.changed
-    readonly property int level: Math.min(100, parseInt(field.text || "0", 10))
+
+    readonly property int level:
+        Math.min(maximumLevel, parseInt(field.text || "0", 10))
+
     readonly property alias fieldFocused: field.activeFocus
 
+    readonly property bool fieldOverMaximum:
+        parseInt(field.text || "0", 10) > maximumLevel
+
     signal accepted()
 
     function reset() { field.reset() }
@@ -26,15 +33,15 @@ AutoDirectionLayout {
 
         radius: 0
         horizontalAlignment: Qt.AlignHCenter
-        validator: IntValidator { top: 100 }
+        validator: IntValidator { top: root.maximumLevel }
         inputMethodHints: Qt.ImhFormattedNumbersOnly
-        maximumLength: control.level < 0 ? 16 : 3
+        maximumLength: root.level < 0 ? 16 : String(root.maximumLevel).length
-        defaultText: String(control.defaultLevel)
+        defaultText: String(root.defaultLevel)
+        error: root.fieldOverMaximum
 
-        onAccepted: control.accepted()
+        onAccepted: root.accepted()
         onActiveFocusChanged:
-            if (! activeFocus && parseInt(text || "0", 10) > 100)
+            if (! activeFocus && fieldOverMaximum) text = root.maximumLevel
-                text = 100
 
         Layout.minimumWidth:
             mainUI.fontMetrics.boundingRect("-999").width +
@@ -52,7 +59,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-default"
             toolTip.text: qsTr("Limited")
-            checked: control.level < 50
+            checked: root.level < 50
             uncheckable: false
             onClicked: field.text = 0
         }
@@ -61,7 +68,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-50"
             toolTip.text: qsTr("Moderator")
-            checked: control.level >= 50 && control.level < 100
+            checked: root.level >= 50 && root.level < 100
             uncheckable: false
             onClicked: field.text = 50
         }
@@ -70,7 +77,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-100"
             toolTip.text: qsTr("Admin")
-            checked: control.level >= 100
+            checked: root.level >= 100
             uncheckable: false
             onClicked: field.text = 100
         }

src/gui/Pages/Chat/RoomPane/MemberView/MemberProfile.qml

@@ -12,6 +12,8 @@ HListView {
 
     property string userId
     property string roomId
+    property int ownPowerLevel
+    property int canSetPowerLevels
     property QtObject member  // RoomMember model item
     property HStackView stackView
 
@@ -160,6 +162,10 @@ HListView {
 
         HLabeledItem {
             id: powerLevel
+            enabled:
+                root.canSetPowerLevels &&
+                root.ownPowerLevel > member.power_level
+
             label.text: qsTr("Power level:")
             label.horizontalAlignment: Qt.AlignHCenter
 
@@ -168,6 +174,7 @@ HListView {
             PowerLevelControl {
                 width: parent.width
                 defaultLevel: member.power_level
+                maximumLevel: root.ownPowerLevel
                 rowSpacing: powerLevel.spacing
                 onAccepted: applyButton.clicked()
                 onFieldFocusedChanged:
@@ -191,6 +198,7 @@ HListView {
 
             ApplyButton {
                 id: applyButton
+                enabled: ! powerLevel.item.fieldOverMaximum
                 loading: setPowerFuture !== null
                 onClicked: {
                     setPowerFuture = py.callClientCoro(
@@ -230,7 +238,7 @@ HListView {
     Component.onDestruction: if (setPowerFuture) setPowerFuture.cancel()
 
     Keys.onEnterPressed: Keys.onReturnPressed(event)
-    Keys.onReturnPressed: if (! powerLevelFieldFocused && currentItem) {
+    Keys.onReturnPressed: if (! root.powerLevelFieldFocused && currentItem) {
         currentItem.leftClicked()
         currentItem.clicked()
     }

src/gui/Pages/Chat/RoomPane/MemberView/MemberView.qml

@@ -33,6 +33,11 @@ HColumnLayout {
                     {
                         userId: chat.userId,
                         roomId: chat.roomId,
+                        ownPowerLevel:
+                            Qt.binding(() => chat.roomInfo.own_power_level),
+                        canSetPowerLevels: Qt.binding(() =>
+                            chat.roomInfo.can_set_power_levels
+                        ),
                         member: model,
                         stackView: stackView,
                     },