Add support for _NET_MOVERESIZE_WINDOW. #344521.

2007-04-09  Elijah Newren  <newren gmail com>

	Add support for _NET_MOVERESIZE_WINDOW.  #344521.

	* src/display.c (handle_net_moveresize_window, event_callback):
	Remove handle_net_moveresize_window() and the call to it; this
	code was highly buggy, though to be fair it was never tested and
	had simply been put into the code in commented out form.

	* src/screen.c (set_supported_hint):
	add atom_net_moveresize_window

	* src/window.[ch]:
	(meta_window_configure_request, meta_window_move_resize_request):
	Split out the moving/resize part of the configure request and put
	it into meta_window_move_resize_request

	(meta_window_client_message):
	check for NET_MOVERESIZE_WINDOW messages and call
	meta_window_move_resize_request() with the appropriate parameters
	to handle them

	(meta_window_move_resize_internal):
	fix some of the big comment at this function -- it wasn't quite
	right, use the passed in gravity instead of
	window->size_hints.win_gravity when calling adjust_for_gravity()
	to make sure the correct adjustments are used.

	(meta_window_get_gravity_position,
	 meta_window_get_geometry, meta_window_move_resize_request):
	add a gravity parameter to meta_window_get_gravity_position and
	have it use that gravity instead of window->size_hints.win_gravity

svn path=/trunk/; revision=3186

4 files changed, 111 insertions, 142 deletions

diff --git a/src/display.c b/src/display.c
index 604f778c..16cea44b 100644
--- a/src/display.c
+++ b/src/display.c
@@ -1366,80 +1366,6 @@ meta_display_queue_autoraise_callback (MetaDisplay *display,
 
 #if 0
 static void
-handle_net_moveresize_window (MetaDisplay* display,
-                              XEvent *event)
-{
-  MetaWindow *window;
-  int x, y, width, height;
-  gboolean only_resize;
-  unsigned int gravity;
-  unsigned int mode;
-
-  window = meta_display_lookup_x_window (display,
-                                         event->xclient.window);
-
-  /*
-   * FIXME: The specification seems to have serious endian issues
-   * here.  Does bits 8-11 mean the high-order byte, or the low-order
-   * byte?
-   */
-  gravity = (event->xclient.data.l[0] & ~0xff);
-  mode = (event->xclient.data.l[0] & ~0xff00) >> 8;
-
-  if (window)
-    {
-      /* FIXME!!!!  This function is _wrong_ except for the resize-only
-       * case.  Even then, it sucks to special case the code instead of
-       * factoring out common functionality with the configure reqest
-       * handling, especially since the EWMH says this message should be
-       * treated identically to a configure request with the exception of
-       * having a special gravity specified.
-       */
-      meta_window_get_gravity_position (window, &x, &y);
-      width = window->rect.width;
-      height = window->rect.height;
-
-      if (mode & (CWX | CWY))
-        only_resize = FALSE;
-      else
-        only_resize = TRUE;
-
-      if (mode & CWX)
-        x = event->xclient.data.l[1];
-      if (mode & CWY)
-        y = event->xclient.data.l[2];
-      if (mode & CWWidth)
-        width = event->xclient.data.l[3];
-      if (mode & CWHeight)
-        height = event->xclient.data.l[4];
-
-      if (only_resize)
-        {
-          if (gravity)
-	    meta_window_resize_with_gravity (window,
-					     FALSE,
-					     width,
-					     height,
-					     gravity);
-          else
-            meta_window_resize (window,
-				FALSE,
-				width,
-				height);
-        }
-      else
-        {
-          meta_window_move_resize (window,
-                                   FALSE,
-                                   x,
-                                   y,
-                                   width,
-                                   height);
-        }
-    }
-}
-
-static void
 handle_net_restack_window (MetaDisplay* display,
                            XEvent *event)
 {
@@ -2228,9 +2154,6 @@ event_callback (XEvent   *event,
             else if (event->xproperty.atom ==
                      display->atom_net_restack_window)
               handle_net_restack_window (display, event);
-            else if (event->xproperty.atom ==
-                     display->atom_net_moveresize_window)
-              handle_net_moveresize_window (display, event);
 #endif
 
             /* we just use this property as a sentinel to avoid
diff --git a/src/screen.c b/src/screen.c
index 96db5659..ab470c94 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -89,7 +89,7 @@ set_wm_check_hint (MetaScreen *screen)
 static int
 set_supported_hint (MetaScreen *screen)
 {
-#define N_SUPPORTED 59
+#define N_SUPPORTED 60
   Atom atoms[N_SUPPORTED];
   
   atoms[0] = screen->display->atom_net_wm_name;
@@ -151,8 +151,9 @@ set_supported_hint (MetaScreen *screen)
   atoms[56] = screen->display->atom_net_desktop_geometry;
   atoms[57] = screen->display->atom_net_desktop_viewport;
   atoms[58] = screen->display->atom_net_wm_user_time_window;
-  //atoms[58] = screen->display->atom_net_restack_window;
-  //atoms[59] = screen->display->atom_net_moveresize_window;
+  atoms[59] = screen->display->atom_net_moveresize_window;
+
+  /* atoms[58] = screen->display->atom_net_restack_window; */
   
   XChangeProperty (screen->display->xdisplay, screen->xroot,
                    screen->display->atom_net_supported,
diff --git a/src/window.c b/src/window.c
index 13fce296..4bf5b548 100644
--- a/src/window.c
+++ b/src/window.c
@@ -2940,34 +2940,34 @@ send_sync_request (MetaWindow *window)
 #endif
 
 static void
-meta_window_move_resize_internal (MetaWindow  *window,
-                                  MetaMoveResizeFlags flags,
-                                  int          resize_gravity,
-                                  int          root_x_nw,
-                                  int          root_y_nw,
-                                  int          w,
-                                  int          h)
+meta_window_move_resize_internal (MetaWindow          *window,
+                                  MetaMoveResizeFlags  flags,
+                                  int                  gravity,
+                                  int                  root_x_nw,
+                                  int                  root_y_nw,
+                                  int                  w,
+                                  int                  h)
 {
   /* meta_window_move_resize_internal gets called with very different
-   * meanings for root_x_nw and root_y_nw.  w & h are always the area of
-   * the inner or client window (i.e. excluding the frame) and the
-   * resize_gravity is always the gravity associated with the resize or
-   * move_resize request (the gravity is ignored for move-only operations).
-   * But the location is different because of how this function gets
-   * called; note that in all cases what we want to find out is the upper
-   * left corner of the position of the inner window:
+   * meanings for root_x_nw and root_y_nw.  w & h are always the area
+   * of the inner or client window (i.e. excluding the frame) and
+   * gravity is the relevant gravity associated with the request (note
+   * that gravity is ignored for move-only operations unless its
+   * e.g. a configure request).  The location is different for
+   * different cases because of how this function gets called; note
+   * that in all cases what we want to find out is the upper left
+   * corner of the position of the inner window:
    *
-   *   Case | Called from (flags; resize_gravity)
+   *   Case | Called from (flags; gravity)
    *   -----+-----------------------------------------------
    *    1   | A resize only ConfigureRequest
    *    1   | meta_window_resize
    *    1   | meta_window_resize_with_gravity
    *    2   | New window
    *    2   | Session restore
-   *    2   | A not-resize-only ConfigureRequest
+   *    2   | A not-resize-only ConfigureRequest/net_moveresize_window request
    *    3   | meta_window_move
    *    3   | meta_window_move_resize
-   *    4   | various functions via handle_net_moveresize_window() in display.c
    *
    * For each of the cases, root_x_nw and root_y_nw must be treated as follows:
    *
@@ -2980,8 +2980,6 @@ meta_window_move_resize_internal (MetaWindow  *window,
    *       know the location of the upper left corner of the inner window.
    *   (3) These values are already the desired positon of the NW corner
    *       of the inner window
-   *   (4) The place that calls this function this way must be fixed; it is
-   *       wrong.
    */
   XWindowChanges values;
   unsigned int mask;
@@ -3045,7 +3043,7 @@ meta_window_move_resize_internal (MetaWindow  *window,
     { 
       meta_rectangle_resize_with_gravity (&old_rect,
                                           &new_rect,
-                                          resize_gravity,
+                                          gravity,
                                           new_rect.width,
                                           new_rect.height);
 
@@ -3061,7 +3059,7 @@ meta_window_move_resize_internal (MetaWindow  *window,
                            * the border width existed
                            */
                           is_configure_request,
-                          window->size_hints.win_gravity,
+                          gravity,
                           &new_rect);
 
       meta_topic (META_DEBUG_GEOMETRY,
@@ -3073,7 +3071,7 @@ meta_window_move_resize_internal (MetaWindow  *window,
   meta_window_constrain (window,
                          window->frame ? &fgeom : NULL,
                          flags,
-                         resize_gravity,
+                         gravity,
                          &old_rect,
                          &new_rect);
 
@@ -3297,7 +3295,7 @@ meta_window_move_resize_internal (MetaWindow  *window,
   
   if (configure_frame_first && window->frame)
     meta_frame_sync_to_window (window->frame,
-                               resize_gravity,
+                               gravity,
                                need_move_frame, need_resize_frame);
 
   values.border_width = 0;
@@ -3354,7 +3352,7 @@ meta_window_move_resize_internal (MetaWindow  *window,
 
   if (!configure_frame_first && window->frame)
     meta_frame_sync_to_window (window->frame,
-                               resize_gravity,
+                               gravity,
                                need_move_frame, need_resize_frame);  
 
   /* Put gravity back to be nice to lesser window managers */
@@ -3633,6 +3631,7 @@ meta_window_get_user_position  (MetaWindow  *window,
 
 void
 meta_window_get_gravity_position (MetaWindow  *window,
+                                  int          gravity,
                                   int         *root_x,
                                   int         *root_y)
 {
@@ -3643,7 +3642,7 @@ meta_window_get_gravity_position (MetaWindow  *window,
   w = window->rect.width;
   h = window->rect.height;
 
-  if (window->size_hints.win_gravity == StaticGravity)
+  if (gravity == StaticGravity)
     {
       frame_extents = window->rect;
       if (window->frame)
@@ -3663,7 +3662,7 @@ meta_window_get_gravity_position (MetaWindow  *window,
   x = frame_extents.x;
   y = frame_extents.y;
   
-  switch (window->size_hints.win_gravity)
+  switch (gravity)
     {
     case NorthGravity:
     case CenterGravity:
@@ -3686,7 +3685,7 @@ meta_window_get_gravity_position (MetaWindow  *window,
       break;
     }
   
-  switch (window->size_hints.win_gravity)
+  switch (gravity)
     {
     case WestGravity:
     case CenterGravity:
@@ -3721,7 +3720,9 @@ meta_window_get_geometry (MetaWindow  *window,
                           int         *width,
                           int         *height)
 {
-  meta_window_get_gravity_position (window, x, y);
+  meta_window_get_gravity_position (window,
+                                    window->size_hints.win_gravity,
+                                    x, y);
 
   *width = (window->rect.width - window->size_hints.base_width) /
     window->size_hints.width_inc;
@@ -4325,9 +4326,14 @@ meta_window_send_icccm_message (MetaWindow *window,
     meta_error_trap_pop (window->display, FALSE);
 }
 
-gboolean
-meta_window_configure_request (MetaWindow *window,
-                               XEvent     *event)
+void
+meta_window_move_resize_request (MetaWindow *window,
+                                 guint       value_mask,
+                                 int         gravity,
+                                 int         new_x,
+                                 int         new_y,
+                                 int         new_width,
+                                 int         new_height)
 {
   int x, y, width, height;
   gboolean allow_position_change;
@@ -4372,8 +4378,9 @@ meta_window_configure_request (MetaWindow *window,
    * server-side position in effect when the configure request was
    * generated.
    */
-
-  meta_window_get_gravity_position (window, &x, &y);
+  meta_window_get_gravity_position (window,
+                                    gravity,
+                                    &x, &y);
 
   allow_position_change = FALSE;
   
@@ -4401,13 +4408,11 @@ meta_window_configure_request (MetaWindow *window,
   
   if (allow_position_change)
     {
-      if (event->xconfigurerequest.value_mask & CWX)
-        x = event->xconfigurerequest.x;
-      
-      if (event->xconfigurerequest.value_mask & CWY)
-        y = event->xconfigurerequest.y;
-
-      if (event->xconfigurerequest.value_mask & (CWX | CWY))
+      if (value_mask & CWX)
+        x = new_x;
+      if (value_mask & CWY)
+        y = new_y;
+      if (value_mask & (CWX | CWY))
         {
           /* Once manually positioned, windows shouldn't be placed
            * by the window manager.
@@ -4426,31 +4431,20 @@ meta_window_configure_request (MetaWindow *window,
 
   width = window->rect.width;
   height = window->rect.height;
-
   if (!in_grab_op)
     {
-      if (event->xconfigurerequest.value_mask & CWWidth)
-        width = event->xconfigurerequest.width;
+      if (value_mask & CWWidth)
+        width = new_width;
       
-      if (event->xconfigurerequest.value_mask & CWHeight)
-        height = event->xconfigurerequest.height;
+      if (value_mask & CWHeight)
+        height = new_height;
     }
 
   /* ICCCM 4.1.5 */
   
-  /* Note that x, y is the corner of the window border,
-   * and width, height is the size of the window inside
-   * its border, but that we always deny border requests
-   * and give windows a border of 0. But we save the
-   * requested border here.
-   */
-  if (event->xconfigurerequest.value_mask & CWBorderWidth)
-    window->border_width = event->xconfigurerequest.border_width;
-
   /* We're ignoring the value_mask here, since sizes
    * not in the mask will be the current window geometry.
    */
-  
   window->size_hints.x = x;
   window->size_hints.y = y;
   window->size_hints.width = width;
@@ -4470,19 +4464,19 @@ meta_window_configure_request (MetaWindow *window,
    * meta_window_move_resize_internal() call.
    */
   flags = META_IS_CONFIGURE_REQUEST;
-  if (event->xconfigurerequest.value_mask & (CWX | CWY))
+  if (value_mask & (CWX | CWY))
     flags |= META_IS_MOVE_ACTION;
-  if (event->xconfigurerequest.value_mask & (CWWidth | CWHeight))
+  if (value_mask & (CWWidth | CWHeight))
     flags |= META_IS_RESIZE_ACTION;
 
   if (flags & (META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION))
     meta_window_move_resize_internal (window, 
                                       flags,
-                                      window->size_hints.win_gravity,
-                                      window->size_hints.x,
-                                      window->size_hints.y,
-                                      window->size_hints.width,
-                                      window->size_hints.height);
+                                      gravity,
+                                      x,
+                                      y,
+                                      width,
+                                      height);
 
   /* window->user_rect exists to allow "snapping-back" the window if a
    * new strut is set (causing the window to move) and then the strut
@@ -4495,6 +4489,28 @@ meta_window_configure_request (MetaWindow *window,
    * See also bug 426519.
    */
   meta_window_get_client_root_coords (window, &window->user_rect);
+}
+
+gboolean
+meta_window_configure_request (MetaWindow *window,
+                               XEvent     *event)
+{
+  /* Note that x, y is the corner of the window border,
+   * and width, height is the size of the window inside
+   * its border, but that we always deny border requests
+   * and give windows a border of 0. But we save the
+   * requested border here.
+   */
+  if (event->xconfigurerequest.value_mask & CWBorderWidth)
+    window->border_width = event->xconfigurerequest.border_width;
+
+  meta_window_move_resize_request(window,
+                                  event->xconfigurerequest.value_mask,
+                                  window->size_hints.win_gravity,
+                                  event->xconfigurerequest.x,
+                                  event->xconfigurerequest.y,
+                                  event->xconfigurerequest.width,
+                                  event->xconfigurerequest.height);
       
   /* Handle stacking. We only handle raises/lowers, mostly because
    * stack.c really can't deal with anything else.  I guess we'll fix
@@ -4967,6 +4983,27 @@ meta_window_client_message (MetaWindow *window,
       return TRUE;
     }
   else if (event->xclient.message_type ==
+           display->atom_net_moveresize_window)
+    {
+      int gravity, source;
+      guint value_mask;
+
+      gravity = (event->xclient.data.l[0] & 0xff);
+      value_mask = (event->xclient.data.l[0] & 0xf00) >> 8;
+      source = (event->xclient.data.l[0] & 0xf000) >> 12;
+
+      if (gravity == 0)
+        gravity = window->size_hints.win_gravity;
+
+      meta_window_move_resize_request(window,
+                                      value_mask,
+                                      gravity,
+                                      event->xclient.data.l[1],  // x
+                                      event->xclient.data.l[2],  // y
+                                      event->xclient.data.l[3],  // width
+                                      event->xclient.data.l[4]); // height
+    }
+  else if (event->xclient.message_type ==
            display->atom_net_active_window)
     {
       MetaClientType source_indication;
diff --git a/src/window.h b/src/window.h
index 38aa2ec2..ad6b39e6 100644
--- a/src/window.h
+++ b/src/window.h
@@ -470,6 +470,7 @@ void        meta_window_get_client_root_coords (MetaWindow    *window,
  * request.
  */
 void        meta_window_get_gravity_position (MetaWindow  *window,
+                                              int          gravity,
                                               int         *x,
                                               int         *y);
 /* Get geometry for saving in the session; x/y are gravity
@@ -509,6 +510,13 @@ void meta_window_send_icccm_message (MetaWindow *window,
                                      guint32     timestamp);
 
 
+void     meta_window_move_resize_request(MetaWindow *window,
+                                         guint       value_mask,
+                                         int         gravity,
+                                         int         x,
+                                         int         y,
+                                         int         width,
+                                         int         height);
 gboolean meta_window_configure_request (MetaWindow *window,
                                         XEvent     *event);
 gboolean meta_window_property_notify   (MetaWindow *window,