PowerLevelControl: add error and warning texts

TODO.md

@@ -1,15 +1,12 @@
 # TODO
 
-- fix reply bar height
 - don't trust PowerLevelsEvent, may be old
+- fix button layout
+- improve power levels event text
+
+- fix reply bar height
 - 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
+- fix HLabeledItem disabled opacity
 
 - save and restore status in accounts.json
 - mark accounts as offline when closing mirage

src/gui/Base/PowerLevelControl.qml

@@ -11,9 +11,8 @@ AutoDirectionLayout {
 
     readonly property alias changed: field.changed
 
-    readonly property int level:
-        Math.min(maximumLevel, parseInt(field.text || "0", 10))
-
+    readonly property int uncappedLevel: parseInt(field.text || "0", 10)
+    readonly property int level: Math.min(maximumLevel, uncappedLevel)
     readonly property alias fieldFocused: field.activeFocus
 
     readonly property bool fieldOverMaximum:
@@ -35,7 +34,7 @@ AutoDirectionLayout {
         horizontalAlignment: Qt.AlignHCenter
         validator: IntValidator { top: root.maximumLevel }
         inputMethodHints: Qt.ImhFormattedNumbersOnly
-        maximumLength: root.level < 0 ? 16 : String(root.maximumLevel).length
+        maximumLength: root.level < 0 ? 16 : 3
         defaultText: String(root.defaultLevel)
         error: root.fieldOverMaximum
 
@@ -59,7 +58,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-default"
             toolTip.text: qsTr("Limited")
-            checked: root.level < 50
+            checked: root.uncappedLevel < 50
             uncheckable: false
             onClicked: field.text = 0
         }
@@ -68,7 +67,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-50"
             toolTip.text: qsTr("Moderator")
-            checked: root.level >= 50 && root.level < 100
+            checked: root.uncappedLevel >= 50 && root.uncappedLevel < 100
             uncheckable: false
             onClicked: field.text = 50
         }
@@ -77,7 +76,7 @@ AutoDirectionLayout {
             height: parent.height
             icon.name: "user-power-100"
             toolTip.text: qsTr("Admin")
-            checked: root.level >= 100
+            checked: root.uncappedLevel >= 100
             uncheckable: false
             onClicked: field.text = 100
         }

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

@@ -169,6 +169,35 @@ HListView {
             label.text: qsTr("Power level:")
             label.horizontalAlignment: Qt.AlignHCenter
 
+            errorLabel.horizontalAlignment: Qt.AlignHCenter
+            errorLabel.text:
+                ! item.changed ?
+                "" :
+
+                item.fieldOverMaximum && root.userId === member.id ?
+                qsTr("Can't set your own level higher") :
+
+                item.fieldOverMaximum ?
+                qsTr("Can't set level higher than your own") :
+
+                item.uncappedLevel === root.ownPowerLevel ?
+                qsTr("You won't be able to demote this user") :
+
+                item.uncappedLevel <
+                root.ownPowerLevel && root.userId === member.id ?
+                qsTr("You won't be able to regain power") :
+
+                ""
+
+            errorLabel.color:
+                item.uncappedLevel === root.ownPowerLevel ||
+                (
+                    item.uncappedLevel <
+                    root.ownPowerLevel && root.userId === member.id
+                ) ?
+                theme.colors.warningText :
+                theme.colors.errorText
+
             Layout.preferredWidth: parent.width
 
             PowerLevelControl {