[compiz] [PATCH] Notification on window restacking

[Erkin Bahceci]

Hi,

This patch adds notification on window restacking. Plugins may need to
do something when that happens. For example, it is used in the new
version of animation plugin to perform a fade effect when a window
moves above or below other windows (in the plugin's settings this
effect is selected as a focus effect, but it's actually a restack
effect).

Regards,
Erkin

diff --git a/include/compiz.h b/include/compiz.h
index fa73e81..eba0aa7 100644
--- a/include/compiz.h
+++ b/include/compiz.h
@@ -1605,6 +1605,8 @@ typedef void (*WindowUngrabNotifyProc) (
 
 typedef void (*WindowStateChangeNotifyProc) (CompWindow *window);
 
+typedef void (*WindowRestackNotifyProc) (CompWindow *window);
+
 typedef void (*OutputChangeNotifyProc) (CompScreen *screen);
 
 #define COMP_SCREEN_DAMAGE_PENDING_MASK (1 << 0)
@@ -1911,6 +1913,8 @@ struct _CompScreen {
 
     WindowStateChangeNotifyProc windowStateChangeNotify;
 
+    WindowRestackNotifyProc windowRestackNotify;
+
     OutputChangeNotifyProc outputChangeNotify;
 
     CompPrivate *privates;
@@ -2581,6 +2585,9 @@ void
 windowStateChangeNotify (CompWindow *w);
 
 void
+windowRestackNotify (CompWindow *w);
+
+void
 moveInputFocusToWindow (CompWindow *w);
 
 void
diff --git a/src/screen.c b/src/screen.c
index 72a2240..6b9a934 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -1702,6 +1702,8 @@ addScreen (CompDisplay *display,
 
     s->windowStateChangeNotify = windowStateChangeNotify;
 
+    s->windowRestackNotify = windowRestackNotify;
+
     s->outputChangeNotify = outputChangeNotify;
 
     s->getProcAddress = 0;
diff --git a/src/window.c b/src/window.c
index 8554001..8cab91d 100644
--- a/src/window.c
+++ b/src/window.c
@@ -2342,6 +2342,8 @@ restackWindow (CompWindow *w,
     else if (aboveId == None)
 	return 0;
 
+    (*w->screen->windowRestackNotify) (w);
+
     unhookWindowFromScreen (w->screen, w);
     insertWindowIntoScreen (w->screen, w, aboveId);
 
@@ -2721,6 +2723,10 @@ windowStateChangeNotify (CompWindow *w)
     w->lastState = w->state;
 }
 
+void windowRestackNotify (CompWindow * w)
+{
+}
+
 static Bool
 isGroupTransient (CompWindow *w,
 		  Window     clientLeader)

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