provide Progress information to indicators

--as a test case, the Plasma indicator now supports
the original plasma progress indicator of plasma
taskmanagers

containment/package/contents/ui/applet/indicator/Bridge.qml

@@ -66,6 +66,9 @@ Item{
     readonly property bool animationsEnabled: root.animationsEnabled
     readonly property real durationTime: root.durationTime
 
+    readonly property bool progressVisible: false /*since 0.9.2*/
+    readonly property real progress: 0 /*since 0.9.2*/
+
     readonly property bool usePlasmaTabsStyle: !indicators.enabledForApplets
 
     readonly property QtObject palette: colorizerManager.applyTheme

indicators/org.kde.latte.plasma/package/ui/BackLayer.qml

@@ -56,32 +56,10 @@ PlasmaCore.FrameSvgItem {
 
             return  "south-active-tab";
         } else {
-            return taskPrefix(basePrefix);
+            return root.taskPrefix(basePrefix);
         }
     }
 
-    function taskPrefix(prefix) {
-        var effectivePrefix;
-
-        if (plasmoid.location === PlasmaCore.Types.LeftEdge) {
-            effectivePrefix = "west-" + prefix;
-        }
-
-        if (plasmoid.location === PlasmaCore.Types.TopEdge) {
-            effectivePrefix = "north-" + prefix;
-        }
-
-        if (plasmoid.location === PlasmaCore.Types.RightEdge) {
-            effectivePrefix = "east-" + prefix;
-        }
-
-        if (plasmoid.location === PlasmaCore.Types.BottomEdge) {
-            effectivePrefix = "south-" + prefix;
-        }
-
-        return [effectivePrefix, prefix];
-    }
-
     states: [
         State {
             name: "launcher"

indicators/org.kde.latte.plasma/package/ui/main.qml

@@ -52,6 +52,37 @@ LatteComponents.IndicatorItem {
         sourceComponent: BackLayer{}
     }
 
+    /* progress overlay for BackLayer*/
+    /* it is not added in the BackLayer because the BackLayer is rotated in some cases*/
+    Loader {
+        anchors.fill: parent
+        asynchronous: true
+        active: level.isBackground && indicator.progressVisible
+        sourceComponent: Item {
+            id: background
+
+            Item {
+                anchors {
+                    top: parent.top
+                    left: parent.left
+                    bottom: parent.bottom
+                }
+
+                width: parent.width * (Math.min(indicator.progress, 100) / 100)
+                clip: true
+
+                PlasmaCore.FrameSvgItem {
+                    id: progressFrame
+                    width: background.width
+                    height: background.height
+
+                    imagePath: "widgets/tasks"
+                    prefix: root.taskPrefix("progress").concat(root.taskPrefix("hover"))
+                }
+            }
+        }
+    }
+
     //! Foreground Layer to draw arrows
     Loader{
         id: frontLayer
@@ -61,4 +92,26 @@ LatteComponents.IndicatorItem {
         sourceComponent: FrontLayer{}
     }
 
+
+    function taskPrefix(prefix) {
+        var effectivePrefix;
+
+        if (plasmoid.location === PlasmaCore.Types.LeftEdge) {
+            effectivePrefix = "west-" + prefix;
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.TopEdge) {
+            effectivePrefix = "north-" + prefix;
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.RightEdge) {
+            effectivePrefix = "east-" + prefix;
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.BottomEdge) {
+            effectivePrefix = "south-" + prefix;
+        }
+
+        return [effectivePrefix, prefix];
+    }
 }

plasmoid/package/contents/ui/task/IconItem.qml

@@ -67,6 +67,8 @@ Item{
 
     readonly property color backgroundColor: iconImageBuffer.backgroundColor
     readonly property color glowColor: iconImageBuffer.glowColor
+    readonly property bool progressVisible: smartLauncherItem && smartLauncherItem.progressVisible
+    readonly property real progress: smartLauncherItem && smartLauncherItem.progress
 
     property QtObject buffers: null
     property QtObject smartLauncherItem: null

plasmoid/package/contents/ui/task/Wrapper.qml

@@ -104,6 +104,9 @@ Item{
     property color backgroundColor: taskIconItem.backgroundColor
     property color glowColor: taskIconItem.glowColor
 
+    property bool progressVisible: taskIconItem.progressVisible
+    property real progress: taskIconItem.progress
+
     property Item visualIconItem: taskIconItem.visualIconItem
     property Item titleTooltipVisualParent: taskIconItem.titleTooltipVisualParent
     property Item previewsTooltipVisualParent: taskIconItem.previewsTootipVisualParent

plasmoid/package/contents/ui/task/indicator/Bridge.qml

@@ -69,6 +69,9 @@ Item {
     readonly property bool animationsEnabled: root.animationsEnabled
     readonly property real durationTime: root.durationTime
 
+    readonly property bool progressVisible: wrapper.progressVisible /*since 0.9.2*/
+    readonly property real progress: wrapper.progress /*since 0.9.2*/
+
     readonly property bool usePlasmaTabsStyle: false
 
     readonly property variant svgs: indicators ? indicators.svgs : []