[applets/battery] Clarify power management inhibition UI

The power management inhibition UI is currently somewhat confusing to
users because it's not clear that the checkbox is a local override for
the permanent settings set elsewhere in System Settings.

A good sign that the UI is sub-optimal is that we refer to it as "power
management inhibition" internally and in our developer conversations,
but the UI expresses the opposite: *allowing* power management, not
inhibiting it. This conflicts in the user's mind with the UI in System
Settings that is also expressed in terms of allowing it. It is further
confused by the fact that the message about apps suppressing power
management is phrased in terms of being an temporary override, and that
we also show an unrelated message about the battery charge limit (if set)
in the same place where we're notifying the user about power management
inhibition.

Let's clarify this UI by doing the following:

- Re-word the checkbox's label to emphasize that it's a local override
  for the settings that were set elsewhere
- Move the charge level message into the battery item itself, since
  that's what it affects
- Slightly re-word the message for when apps are inhibiting power
  management to emphasize that power management can be inhibited
  automatically by apps in additionto manually by the user

BUG: 435827
FIXED-IN: 5.22

applets/batterymonitor/package/contents/ui/BatteryItem.qml

@@ -208,6 +208,19 @@ Item {
             opacity: 0.5
             sourceComponent: batteryDetails
         }
+
+        InhibitionHint {
+            anchors {
+                left: parent.left
+                leftMargin: batteryIcon.width + PlasmaCore.Units.gridUnit
+                right: parent.right
+            }
+            readonly property var chargeStopThreshold: pmSource.data["Battery"] ? pmSource.data["Battery"]["Charge Stop Threshold"] : undefined
+            readonly property bool pluggedIn: pmSource.data["AC Adapter"] !== undefined && pmSource.data["AC Adapter"]["Plugged in"]
+            visible: pluggedIn && typeof chargeStopThreshold === "number" && chargeStopThreshold > 0 && chargeStopThreshold < 100
+            iconSource: "kt-speed-limits" // FIXME good icon
+            text: i18n("Your battery is configured to only charge up to %1%.", chargeStopThreshold || 0)
+        }
     }
 
 }

applets/batterymonitor/package/contents/ui/PopupDialog.qml

@@ -35,14 +35,14 @@ PlasmaComponents3.Page {
     property bool isBrightnessAvailable
     property bool isKeyboardBrightnessAvailable
 
-    signal powermanagementChanged(bool checked)
+    signal powermanagementChanged(bool disabled)
 
     header: PlasmaExtras.PlasmoidHeading {
         PowerManagementItem {
             id: pmSwitch
             width: parent.width
             pluggedIn: dialog.pluggedIn
-            onEnabledChanged: powermanagementChanged(enabled)
+            onDisabledChanged: powermanagementChanged(disabled)
             KeyNavigation.tab: batteryList
             KeyNavigation.backtab: keyboardBrightnessSlider
         }

applets/batterymonitor/package/contents/ui/PowerManagementItem.qml

@@ -25,8 +25,8 @@ import org.kde.plasma.components 3.0 as PlasmaComponents3
 import org.kde.kquickcontrolsaddons 2.0
 
 ColumnLayout {
-    id: powerManagementHeadingColumn
-    property alias enabled: pmCheckBox.checked
+    id: powerManagement
+    property alias disabled: pmCheckBox.checked
     property bool pluggedIn
 
     spacing: 0
@@ -38,8 +38,8 @@ ColumnLayout {
         PlasmaComponents3.CheckBox {
             id: pmCheckBox
             Layout.fillWidth: true
-            text: i18nc("Minimize the length of this string as much as possible", "Allow automatic sleep and screen locking")
-            checked: true
+            text: i18nc("Minimize the length of this string as much as possible", "Inhibit automatic sleep and screen locking")
+            checked: false
         }
     }
 
@@ -50,42 +50,43 @@ ColumnLayout {
 
         InhibitionHint {
             Layout.fillWidth: true
-            readonly property var chargeStopThreshold: pmSource.data["Battery"] ? pmSource.data["Battery"]["Charge Stop Threshold"] : undefined
-            visible: powerManagementHeadingColumn.pluggedIn && typeof chargeStopThreshold === "number" && chargeStopThreshold > 0 && chargeStopThreshold < 100
-            iconSource: "kt-speed-limits" // FIXME good icon
-            text: i18n("Your battery is configured to only charge up to %1%.", chargeStopThreshold || 0)
+            visible: pmSource.data["PowerDevil"] && pmSource.data["PowerDevil"]["Is Lid Present"] && !pmSource.data["PowerDevil"]["Triggers Lid Action"] ? true : false
+            iconSource: "computer-laptop"
+            text: i18nc("Minimize the length of this string as much as possible", "Your notebook is configured not to sleep when closing the lid while an external monitor is connected.")
         }
 
+
+        // UI to display when there is only one inhibition
         InhibitionHint {
+            // Don't need to show the inhibitions when power management
+            // isn't enabled anyway
+            visible: inhibitions.length === 1 && !powerManagement.disabled
             Layout.fillWidth: true
-            visible: pmSource.data["PowerDevil"] && pmSource.data["PowerDevil"]["Is Lid Present"] && !pmSource.data["PowerDevil"]["Triggers Lid Action"] ? true : false
-            iconSource: "computer-laptop"
-            text: i18nc("Minimize the length of this string as much as possible", "Your notebook is configured not to sleep when closing the lid while an external monitor is connected.")
+            iconSource: inhibitions[0].Icon || ""
+            text: inhibitions[0].Reason ?
+                                        i18n("%1 is inhibiting sleep and screen locking (%2)", inhibitions[0].Name, inhibitions[0].Reason)
+                                        : i18n("%1 is inhibiting sleep and screen locking (unknown reason)", inhibitions[0].Name)
         }
 
+
+        // UI to display when there is more than one inhibition
         PlasmaComponents3.Label {
             id: inhibitionExplanation
             Layout.fillWidth: true
             // Don't need to show the inhibitions when power management
             // isn't enabled anyway
-            visible: inhibitions.length > 0 && pmCheckBox.checked
+            visible: inhibitions.length > 1 && !powerManagement.disabled
             font: PlasmaCore.Theme.smallestFont
             wrapMode: Text.WordWrap
             elide: Text.ElideRight
             maximumLineCount: 3
-            text: {
-                if (inhibitions.length === 1) {
-                    return i18n("An application is preventing sleep and screen locking:")
-                } else if (inhibitions.length > 1) {
-                    return i18np("%1 application is preventing sleep and screen locking:",
-                                 "%1 applications are preventing sleep and screen locking:",
-                                 inhibitions.length)
-                } else {
-                    return ""
-                }
-            }
+            text: i18np("%1 application is inhibiting sleep and screen locking:",
+                        "%1 applications are inhibiting sleep and screen locking:",
+                        inhibitions.length)
         }
         Repeater {
+            visible: inhibitions.length > 1
+
             model: inhibitionExplanation.visible ? inhibitions.length : null
 
             InhibitionHint {

applets/batterymonitor/package/contents/ui/batterymonitor.qml

@@ -223,39 +223,39 @@ Item {
         property int cookie2: -1
         onPowermanagementChanged: {
             var service = pmSource.serviceForSource("PowerDevil");
-            if (checked) {
-                var op1 = service.operationDescription("stopSuppressingSleep");
-                op1.cookie = cookie1;
-                var op2 = service.operationDescription("stopSuppressingScreenPowerManagement");
-                op2.cookie = cookie2;
+            if (disabled) {
+                var reason = i18n("The battery applet has enabled system-wide inhibition");
+                var op1 = service.operationDescription("beginSuppressingSleep");
+                op1.reason = reason;
+                var op2 = service.operationDescription("beginSuppressingScreenPowerManagement");
+                op2.reason = reason;
 
                 var job1 = service.startOperationCall(op1);
                 job1.finished.connect(function(job) {
-                    cookie1 = -1;
+                    cookie1 = job.result;
                 });
 
                 var job2 = service.startOperationCall(op2);
                 job2.finished.connect(function(job) {
-                    cookie2 = -1;
+                    cookie2 = job.result;
                 });
             } else {
-                var reason = i18n("The battery applet has enabled system-wide inhibition");
-                var op1 = service.operationDescription("beginSuppressingSleep");
-                op1.reason = reason;
-                var op2 = service.operationDescription("beginSuppressingScreenPowerManagement");
-                op2.reason = reason;
+                var op1 = service.operationDescription("stopSuppressingSleep");
+                op1.cookie = cookie1;
+                var op2 = service.operationDescription("stopSuppressingScreenPowerManagement");
+                op2.cookie = cookie2;
 
                 var job1 = service.startOperationCall(op1);
                 job1.finished.connect(function(job) {
-                    cookie1 = job.result;
+                    cookie1 = -1;
                 });
 
                 var job2 = service.startOperationCall(op2);
                 job2.finished.connect(function(job) {
-                    cookie2 = job.result;
+                    cookie2 = -1;
                 });
             }
-            batterymonitor.powermanagementDisabled = !checked
+            batterymonitor.powermanagementDisabled = disabled
         }
     }
 }