Add notifications for Window goes to/fro Fullscreen

FEATURE: 124612
FIXED-IN: 4.9.0
REVIEW: 104457

kwin/geometry.cpp

@@ -2353,6 +2353,11 @@ void Client::setFullScreen(bool set, bool user)
     if (was_fs != isFullScreen()) {
         emit clientFullScreenSet(this, set, user);
         emit fullScreenChanged();
+        if (isFullScreen()) {
+            Notify::raise(Notify::FullScreen);
+        } else {
+            Notify::raise(Notify::UnFullScreen);
+        }
     }
 }
 

kwin/kwin.notifyrc

@@ -7424,3 +7424,11 @@ Comment[x-test]=xxTiling Layout has been changedxx
 Comment[zh_CN]=已更改平铺布局
 Comment[zh_TW]=鋪排佈局已變更
 Action=Popup
+
+[Event/fullscreen]
+Name=Window Fullscreen Set
+Comment=A window has been set to fullscreen
+
+[Event/unfullscreen]
+Name=Window Fullscreen Restored
+Comment=A window has been restored from fullscreen

kwin/notifications.cpp

@@ -104,6 +104,12 @@ bool Notify::raise(Event e, const QString& message, Client* c)
     case TilingLayoutChanged:
         event = "tilinglayoutchanged";
         break;
+    case FullScreen:
+        event = "fullscreen";
+        break;
+    case UnFullScreen:
+        event = "unfullscreen";
+        break;
     default:
         if ((e > DesktopChange) && (e <= DesktopChange + 20)) {
             event = QString("desktop%1").arg(e - DesktopChange);

kwin/notifications.h

@@ -59,6 +59,8 @@ public:
         DemandAttentionOther,
         CompositingSuspendedDbus,
         TilingLayoutChanged,
+        FullScreen,
+        UnFullScreen,
         DesktopChange = 100
     };