...

src/display.c

@@ -127,7 +127,9 @@ meta_display_open (const char *name)
     "_WIN_WORKSPACE",
     "_WIN_LAYER",
     "_WIN_PROTOCOLS",
-    "_WIN_SUPPORTING_WM_CHECK"
+    "_WIN_SUPPORTING_WM_CHECK",
+    "_NET_WM_ICON_NAME",
+    "_NET_WM_ICON"
   };
   Atom atoms[G_N_ELEMENTS(atom_names)];
   
@@ -204,6 +206,8 @@ meta_display_open (const char *name)
   display->atom_win_layer = atoms[33];
   display->atom_win_protocols = atoms[34];
   display->atom_win_supporting_wm_check = atoms[35];
+  display->atom_net_wm_icon_name = atoms[36];
+  display->atom_net_wm_icon = atoms[37];
   
   /* Offscreen unmapped window used for _NET_SUPPORTING_WM_CHECK,
    * created in screen_new
@@ -551,9 +555,8 @@ event_callback (XEvent   *event,
   switch (event->type)
     {
     case KeyPress:
-      meta_display_process_key_press (display, window, event);
-      break;
     case KeyRelease:
+      meta_display_process_key_event (display, window, event);
       break;
     case ButtonPress:
       break;

src/display.h

@@ -92,6 +92,8 @@ struct _MetaDisplay
   Atom atom_win_layer;
   Atom atom_win_protocols;
   Atom atom_win_supporting_wm_check;
+  Atom atom_net_wm_icon_name;
+  Atom atom_net_wm_icon;
   
   /* This is the actual window from focus events,
    * not the one we last set

src/frame.c

@@ -21,6 +21,7 @@
 
 #include "frame.h"
 #include "errors.h"
+#include "keybindings.h"
 
 #define EVENT_MASK (SubstructureRedirectMask |                     \
                     StructureNotifyMask | SubstructureNotifyMask | \
@@ -282,10 +283,9 @@ meta_frame_event (MetaFrame *frame,
   switch (event->type)
     {
     case KeyPress:
-      meta_display_process_key_press (frame->window->display,
-                                      frame->window, event);
-      break;
     case KeyRelease:
+      meta_display_process_key_event (frame->window->display,
+                                      frame->window, event);
       break;
     case ButtonPress:
       break;

src/keybindings.c

@@ -52,6 +52,10 @@ static void handle_tab_backward       (MetaDisplay *display,
                                        MetaWindow  *window,
                                        XEvent      *event,
                                        gpointer     data);
+static void handle_focus_previous     (MetaDisplay *display,
+                                       MetaWindow  *window,
+                                       XEvent      *event,
+                                       gpointer     data);
 
 typedef struct _MetaKeyBinding MetaKeyBinding;
 
@@ -88,6 +92,7 @@ static MetaKeyBinding window_bindings[] = {
   { XK_Tab, Mod1Mask, KeyPress, handle_tab_forward, NULL, 0 },
   { XK_ISO_Left_Tab, ShiftMask | Mod1Mask, KeyPress, handle_tab_backward, NULL, 0 },
   { XK_Tab, ShiftMask | Mod1Mask, KeyPress, handle_tab_backward, NULL, 0 },
+  { XK_Escape, Mod1Mask, KeyPress, handle_focus_previous, NULL, 0 },
   { None, 0, 0, NULL, NULL, 0 }
 };
 
@@ -264,7 +269,7 @@ meta_display_process_key_event (MetaDisplay *display,
 
 static void
 handle_activate_workspace (MetaDisplay *display,
-                           MetaWindow  *window,
+                           MetaWindow  *event_window,
                            XEvent      *event,
                            gpointer     data)
 {
@@ -287,7 +292,7 @@ handle_activate_workspace (MetaDisplay *display,
 
 static void
 handle_activate_menu (MetaDisplay *display,
-                      MetaWindow  *window,
+                      MetaWindow  *event_window,
                       XEvent      *event,
                       gpointer     data)
 {
@@ -307,10 +312,12 @@ handle_activate_menu (MetaDisplay *display,
 
 static void
 handle_tab_forward (MetaDisplay *display,
-                    MetaWindow  *window,
+                    MetaWindow  *event_window,
                     XEvent      *event,
                     gpointer     data)
 {
+  MetaWindow *window;
+  
   meta_verbose ("Tab forward\n");
   
   window = NULL;
@@ -322,7 +329,20 @@ handle_tab_forward (MetaDisplay *display,
     }
 
   if (window == NULL)
-    window = meta_stack_get_bottom (display->focus_window->screen->stack);
+    {
+      if (event_window)
+        window = meta_stack_get_bottom (event_window->screen->stack);
+      else
+        {
+          MetaScreen *screen;
+          
+          screen = meta_display_screen_for_root (display,
+                                                 event->xkey.window);
+          
+          if (screen)
+            window = meta_stack_get_bottom (screen->stack);
+        }
+    }
 
   if (window && window != display->focus_window)
     meta_window_focus (window, event->xkey.time);
@@ -330,10 +350,12 @@ handle_tab_forward (MetaDisplay *display,
 
 static void
 handle_tab_backward (MetaDisplay *display,
-                     MetaWindow  *window,
+                     MetaWindow  *event_window,
                      XEvent      *event,
                      gpointer     data)
 {
+  MetaWindow *window;
+  
   meta_verbose ("Tab backward\n");
   
   window = NULL;
@@ -345,8 +367,40 @@ handle_tab_backward (MetaDisplay *display,
     }
   
   if (window == NULL)
-    window = meta_stack_get_top (display->focus_window->screen->stack);
+    {
+      if (event_window)
+        window = meta_stack_get_top (event_window->screen->stack);
+
+      if (window == NULL)
+        {
+          MetaScreen *screen;
+          
+          screen = meta_display_screen_for_root (display,
+                                                 event->xkey.window);
+          
+          if (screen)
+            window = meta_stack_get_top (screen->stack);
+        }
+    }
 
   if (window && window != display->focus_window)
     meta_window_focus (window, event->xkey.time);
 }
+
+static void
+handle_focus_previous (MetaDisplay *display,
+                       MetaWindow  *event_window,
+                       XEvent      *event,
+                       gpointer     data)
+{
+  MetaWindow *window;
+
+  meta_verbose ("Focus previous window\n");
+  
+  window = display->prev_focus_window;
+
+  if (window)
+    meta_window_focus (window, event->xkey.time);
+}
+
+

src/keybindings.h

@@ -30,7 +30,7 @@ void meta_screen_grab_keys          (MetaScreen  *screen);
 void meta_screen_ungrab_keys        (MetaScreen  *screen);
 void meta_window_grab_keys          (MetaWindow  *window);
 void meta_window_ungrab_keys        (MetaWindow  *window);
-void meta_display_process_key_press (MetaDisplay *display,
+void meta_display_process_key_event (MetaDisplay *display,
                                      MetaWindow  *window,
                                      XEvent      *event);
 

src/stack.c

@@ -661,3 +661,102 @@ meta_stack_sync_to_server (MetaStack *stack)
   /* That was scary... */
 }
 
+static MetaWindow*
+find_next_above_layer (MetaStack *stack,
+                       int        layer)
+{
+  ++layer;
+  while (layer < META_LAYER_LAST)
+    {
+      GList *link;
+
+      g_assert (layer >= 0 && layer < META_LAYER_LAST);
+
+      /* bottom of this layer is at the end of the list */
+      link = g_list_last (stack->layers[layer]);
+      
+      if (link)
+        return link->data;
+      
+      ++layer;
+    }
+
+  return NULL;
+}
+
+static MetaWindow*
+find_prev_below_layer (MetaStack     *stack,
+                       int            layer)
+{
+  --layer;
+  while (layer >= 0)
+    {
+      GList *link;
+
+      g_assert (layer >= 0 && layer < META_LAYER_LAST);
+
+      /* top of this layer is at the front of the list */
+      link = stack->layers[layer];
+      
+      if (link)
+        return link->data;
+      
+      --layer;
+    }
+
+  return NULL;
+}
+
+MetaWindow*
+meta_stack_get_top (MetaStack *stack)
+{
+  /* FIXME if stack is frozen this is kind of broken. */
+  
+  return find_prev_below_layer (stack, META_LAYER_LAST);
+}
+
+MetaWindow*
+meta_stack_get_bottom (MetaStack  *stack)
+{
+  /* FIXME if stack is frozen this is kind of broken. */
+  
+  return find_next_above_layer (stack, -1);
+}
+
+MetaWindow*
+meta_stack_get_above (MetaStack      *stack,
+                      MetaWindow     *window)
+{
+  GList *link;
+
+  /* FIXME if stack is frozen this is kind of broken. */
+  
+  g_assert (window->layer >= 0 && window->layer < META_LAYER_LAST);
+  link = g_list_find (stack->layers[window->layer], window);
+  if (link == NULL)
+    return NULL;
+
+  if (link->prev)
+    return link->prev->data;
+  else
+    return find_next_above_layer (stack, window->layer);
+}
+
+MetaWindow*
+meta_stack_get_below (MetaStack      *stack,
+                      MetaWindow     *window)
+{
+  GList *link;
+
+  /* FIXME if stack is frozen this is kind of broken. */
+
+  g_assert (window->layer >= 0 && window->layer < META_LAYER_LAST);
+  link = g_list_find (stack->layers[window->layer], window);
+  if (link == NULL)
+    return NULL;
+
+  if (link->next)
+    return link->next->data;
+  else
+    return find_prev_below_layer (stack, window->layer);
+}

src/stack.h

@@ -85,6 +85,14 @@ void       meta_stack_lower     (MetaStack      *stack,
 void       meta_stack_freeze    (MetaStack      *stack);
 void       meta_stack_thaw      (MetaStack      *stack);
 
+MetaWindow* meta_stack_get_top    (MetaStack  *stack);
+MetaWindow* meta_stack_get_bottom (MetaStack  *stack);
+MetaWindow* meta_stack_get_above  (MetaStack  *stack,
+                                   MetaWindow *window);
+MetaWindow* meta_stack_get_below  (MetaStack  *stack,
+                                   MetaWindow *window);
+
+
 #endif
 
 

src/window.c

@@ -382,6 +382,9 @@ meta_window_free (MetaWindow  *window)
   if (window->display->focus_window == window)
     window->display->focus_window = NULL;
 
+  if (window->display->prev_focus_window == window)
+    window->display->prev_focus_window = NULL;
+  
   meta_window_unqueue_calc_showing (window);
   
   tmp = window->workspaces;
@@ -1599,10 +1602,38 @@ meta_window_notify_focus (MetaWindow *window,
    * we focus the frame for shaded windows
    */
 
+  /* We don't ever want to set prev_focus_window to NULL,
+   * though it may be NULL due to e.g. only one window ever
+   * getting focus, or a window disappearing.
+   */
+
+  /* We ignore grabs, though this is questionable.
+   * It may be better to increase the intelligence of
+   * the focus window tracking.
+   *
+   * The problem is that keybindings for windows are done
+   * with XGrabKey, which means focus_window disappears
+   * and prev_focus_window gets confused from what the
+   * user expects once a keybinding is used.
+   */
+  if (event->xfocus.mode == NotifyGrab ||
+      event->xfocus.mode == NotifyUngrab)
+    return TRUE;
+    
   if (event->type == FocusIn)
     {
       if (window != window->display->focus_window)
+        {
+          if (window == window->display->prev_focus_window &&
+              window->display->focus_window != NULL)
+            {
+              meta_verbose ("%s is now the previous focus window due to another window focused in\n",
+                            window->display->focus_window->desc);
+              window->display->prev_focus_window = window->display->focus_window;
+            }
+          meta_verbose ("New focus window %s\n", window->desc);
           window->display->focus_window = window;
+        }
       window->has_focus = TRUE;
       if (window->frame)
         meta_frame_queue_draw (window->frame);
@@ -1610,7 +1641,13 @@ meta_window_notify_focus (MetaWindow *window,
   else if (event->type == FocusOut)
     {
       if (window == window->display->focus_window)
+        {
+          meta_verbose ("%s is now the previous focus window due to being focused out\n",
+                        window->desc);
+          window->display->prev_focus_window = window;
+
           window->display->focus_window = NULL;
+        }
       window->has_focus = FALSE;
       if (window->frame)
         meta_frame_queue_draw (window->frame);

src/window.h

@@ -26,6 +26,7 @@
 #include "util.h"
 #include "stack.h"
 #include <X11/Xutil.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
 
 typedef enum
 {
@@ -51,6 +52,9 @@ struct _MetaWindow
   char *desc; /* used in debug spew */
   char *title;
 
+  char *icon_name;
+  GdkPixbuf *icon;
+  
   MetaWindowType type;
   Atom type_atom;
   
@@ -66,6 +70,9 @@ struct _MetaWindow
   Window xgroup_leader;
   Window xclient_leader;
 
+  Pixmap icon_pixmap;
+  Pixmap icon_mask;
+  
   /* Initial workspace property */
   int initial_workspace;