introduce new PlasmaTabStyle indicator

--this indicator is used only internally from Latte
in order to draw default plasma applets tab style
indicators when the user has chosen to not draw
latte specific indicators. A good example of its
usage is when the plasma theme contains tabbar
indicator which is used in applets and the Latte
overlayed icon applets need to use the same visual
with the regular plasma applets.

app/indicator/factory.cpp

@@ -144,7 +144,8 @@ void Factory::reload(const QString &indicatorPath)
                 }
 
                 if ((metadata.pluginId() != "org.kde.latte.default")
-                        && (metadata.pluginId() != "org.kde.latte.plasma")) {
+                        && (metadata.pluginId() != "org.kde.latte.plasma")
+                        && (metadata.pluginId() != "org.kde.latte.plasmatabstyle")) {
 
                     if (!m_customPluginIds.contains(metadata.pluginId())) {
                         m_customPluginIds << metadata.pluginId();
@@ -221,7 +222,7 @@ void Factory::removeIndicatorRecords(const QString &path)
 
 bool Factory::isCustomType(const QString &id) const
 {
-    return ((id != "org.kde.latte.default") && (id != "org.kde.latte.plasma"));
+    return ((id != "org.kde.latte.default") && (id != "org.kde.latte.plasma") && (id != "org.kde.latte.plasmatabstyle"));
 }
 
 bool Factory::metadataAreValid(KPluginMetaData &metadata)

app/view/indicator/indicator.cpp

@@ -288,7 +288,7 @@ void Indicator::loadPlasmaComponent()
 {
     auto prevComponent = m_plasmaComponent;
 
-    KPluginMetaData metadata = m_corona->indicatorFactory()->metadata("org.kde.latte.plasma");
+    KPluginMetaData metadata = m_corona->indicatorFactory()->metadata("org.kde.latte.plasmatabstyle");
     QString uiPath = metadata.value("X-Latte-MainScript");
 
     if (!uiPath.isEmpty()) {

indicators/CMakeLists.txt

@@ -1,2 +1,3 @@
 install(DIRECTORY default DESTINATION ${CMAKE_INSTALL_PREFIX}/share/latte/indicators)
 install(DIRECTORY org.kde.latte.plasma DESTINATION ${CMAKE_INSTALL_PREFIX}/share/latte/indicators)
+install(DIRECTORY org.kde.latte.plasmatabstyle DESTINATION ${CMAKE_INSTALL_PREFIX}/share/latte/indicators)

indicators/Messages.sh

@@ -1,4 +1,5 @@
 #! /usr/bin/env bash
 
 $XGETTEXT `find default -name \*.js -o -name \*.qml -o -name \*.cpp` -o $podir/latte_indicator_org.kde.latte.default.pot
-$XGETTEXT `find org.kde.latte.plasma -name \*.js -o -name \*.qml -o -name \*.cpp` -o $podir/latte_indicator_org.kde.latte.plasma.pot 
+$XGETTEXT `find org.kde.latte.plasma -name \*.js -o -name \*.qml -o -name \*.cpp` -o $podir/latte_indicator_org.kde.latte.plasma.pot
+$XGETTEXT `find org.kde.latte.plasmatabstyle -name \*.js -o -name \*.qml -o -name \*.cpp` -o $podir/latte_indicator_org.kde.latte.plasmatabstyle.pot 

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

@@ -27,38 +27,12 @@ PlasmaCore.FrameSvgItem {
     id: frame
     property string basePrefix: "normal"
 
-    imagePath: root.usePlasmaTabsStyle ? "widgets/tabbar" : "widgets/tasks"
+    imagePath: "widgets/tasks"
     rotation: root.reversedEnabled ? 180 : 0
 
-    opacity: 1 //state === "hovered" ? 0.9 : 1
+    opacity: 1
 
-    prefix: {
-        if (root.usePlasmaTabsStyle) {
-            if (!indicator.isActive) {
-                return "";
-            }
-
-            if (plasmoid.location === PlasmaCore.Types.LeftEdge) {
-                return "west-active-tab";
-            }
-
-            if (plasmoid.location === PlasmaCore.Types.TopEdge) {
-                return "north-active-tab";
-            }
-
-            if (plasmoid.location === PlasmaCore.Types.RightEdge) {
-                return "east-active-tab";
-            }
-
-            if (plasmoid.location === PlasmaCore.Types.BottomEdge) {
-                return "south-active-tab";
-            }
-
-            return  "south-active-tab";
-        } else {
-            return root.taskPrefix(basePrefix);
-        }
-    }
+    prefix: root.taskPrefix(basePrefix)
 
     states: [
         State {

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

@@ -48,7 +48,6 @@ LatteComponents.IndicatorItem {
                                             && indicator.configuration.reversed
 
 
-    readonly property bool usePlasmaTabsStyle: false
     readonly property bool configurationIsReady: indicator && indicator.configuration
 
     //! Background Layer

indicators/org.kde.latte.plasmatabstyle/metadata.desktop

@@ -0,0 +1,20 @@
+[Desktop Entry]
+Name=Plasma Tab Style
+Comment=Plasma Tab style indicator for Latte
+
+Encoding=UTF-8
+Type=Service
+Icon=latte-dock
+X-Plasma-API=declarativeappletscript
+X-KDE-ServiceTypes=Latte/Indicator
+
+X-Latte-MainScript=ui/main.qml
+
+X-KDE-PluginInfo-Author=Michail Vourlakos
+X-KDE-PluginInfo-Email=mvourlakos@gmail.com
+X-KDE-PluginInfo-Name=org.kde.latte.plasmatabstyle
+X-KDE-PluginInfo-Version=0.1
+X-KDE-PluginInfo-Category=Latte Indicator
+X-KDE-PluginInfo-License=GPL v2+
+X-KDE-PluginInfo-EnabledByDefault=true
+

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

@@ -0,0 +1,105 @@
+/*
+*  Copyright 2020  Michail Vourlakos <mvourlakos@gmail.com>
+*
+*  This file is part of Latte-Dock
+*
+*  Latte-Dock is free software; you can redistribute it and/or
+*  modify it under the terms of the GNU General Public License as
+*  published by the Free Software Foundation; either version 2 of
+*  the License, or (at your option) any later version.
+*
+*  Latte-Dock is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*
+*  You should have received a copy of the GNU General Public License
+*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import QtQuick 2.0
+
+import org.kde.plasma.core 2.0 as PlasmaCore
+
+import org.kde.latte 0.2 as Latte
+
+PlasmaCore.FrameSvgItem {    id: frame
+    property string basePrefix: "normal"
+
+    imagePath: "widgets/tabbar"
+    rotation: 0
+
+    opacity: 1
+
+    prefix: {
+        if (!indicator.isActive) {
+            return "";
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.LeftEdge) {
+            return "west-active-tab";
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.TopEdge) {
+            return "north-active-tab";
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.RightEdge) {
+            return "east-active-tab";
+        }
+
+        if (plasmoid.location === PlasmaCore.Types.BottomEdge) {
+            return "south-active-tab";
+        }
+
+        return  "south-active-tab";
+    }
+
+    states: [
+        State {
+            name: "launcher"
+            when: indicator.isLauncher || (indicator.isApplet && !indicator.isActive)
+
+            PropertyChanges {
+                target: frame
+                basePrefix: ""
+            }
+        },
+        State {
+            name: "hovered"
+            when: indicator.isHovered && frame.hasElementPrefix("hover")
+
+            PropertyChanges {
+                target: frame
+                basePrefix: "hover"
+            }
+        },
+        State {
+            name: "attention"
+            when: indicator.inAttention
+
+            PropertyChanges {
+                target: frame
+                basePrefix: "attention"
+            }
+        },
+        State {
+            name: "minimized"
+            when: indicator.isMinimized
+
+            PropertyChanges {
+                target: frame
+                basePrefix: "minimized"
+            }
+        },
+        State {
+            name: "active"
+            when: indicator.isActive
+
+            PropertyChanges {
+                target: frame
+                basePrefix: "focus"
+            }
+        }
+    ]
+}

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

@@ -0,0 +1,44 @@
+/*
+*  Copyright 2020  Michail Vourlakos <mvourlakos@gmail.com>
+*
+*  This file is part of Latte-Dock
+*
+*  Latte-Dock is free software; you can redistribute it and/or
+*  modify it under the terms of the GNU General Public License as
+*  published by the Free Software Foundation; either version 2 of
+*  the License, or (at your option) any later version.
+*
+*  Latte-Dock is distributed in the hope that it will be useful,
+*  but WITHOUT ANY WARRANTY; without even the implied warranty of
+*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*  GNU General Public License for more details.
+*
+*  You should have received a copy of the GNU General Public License
+*  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import QtQuick 2.0
+
+import org.kde.plasma.core 2.0 as PlasmaCore
+
+import org.kde.latte 0.2 as Latte
+import org.kde.latte.components 1.0 as LatteComponents
+
+LatteComponents.IndicatorItem {
+    id: root
+
+    lengthPadding: 0.08
+
+    //! Background Layer
+    Loader{
+        id: backLayer
+        anchors.fill: parent
+        anchors.topMargin: plasmoid.location === PlasmaCore.Types.TopEdge ? indicator.screenEdgeMargin : 0
+        anchors.bottomMargin: plasmoid.location === PlasmaCore.Types.BottomEdge ? indicator.screenEdgeMargin : 0
+        anchors.leftMargin: plasmoid.location === PlasmaCore.Types.LeftEdge ? indicator.screenEdgeMargin : 0
+        anchors.rightMargin: plasmoid.location === PlasmaCore.Types.RightEdge ? indicator.screenEdgeMargin : 0
+
+        active: level.isBackground && !indicator.isEmptySpace
+        sourceComponent: BackLayer{}
+    }
+}