Take Xinerama screen edges into consideration.

2002-05-25  Anders Carlsson  <andersca@gnu.org>

	* src/place.c: (get_vertical_edges), (get_horizontal_edges):
	Take Xinerama screen edges into consideration.

	* src/screen.c: (meta_rectangle_intersect),
	(meta_screen_get_xinerama_for_window):
	* src/screen.h:
	Add a new function that returns the xinerama monitor that
	a window is on.

ChangeLog

@@ -1,3 +1,14 @@
+2002-05-25  Anders Carlsson  <andersca@gnu.org>
+
+	* src/place.c: (get_vertical_edges), (get_horizontal_edges):
+	Take Xinerama screen edges into consideration.
+	
+	* src/screen.c: (meta_rectangle_intersect),
+	(meta_screen_get_xinerama_for_window):
+	* src/screen.h:
+	Add a new function that returns the xinerama monitor that 
+	a window is on.
+	
 2002-05-24  Havoc Pennington  <hp@pobox.com>
 
 	* src/window.c (menu_callback): follow windows to their new

src/place.c

@@ -546,7 +546,7 @@ get_vertical_edges (MetaWindow *window,
   GSList *tmp;
   int n_windows;
   int *edges;
-  int i;
+  int i, j;
   int n_edges;
   MetaRectangle rect;
   MetaRectangle work_area;
@@ -554,7 +554,7 @@ get_vertical_edges (MetaWindow *window,
   windows = get_windows_on_same_workspace (window, &n_windows);
 
   i = 0;
-  n_edges = n_windows * 2 + 4; /* 4 = workspace/screen edges */
+  n_edges = n_windows * 2 + 4 + window->screen->n_xinerama_infos - 1; /* 4 = workspace/screen edges */
   edges = g_new (int, n_edges);
 
   /* workspace/screen edges */
@@ -573,6 +573,13 @@ get_vertical_edges (MetaWindow *window,
 
   g_assert (i == 4);
 
+  /* Now get the xinerama screen edges */
+  for (j = 0; j < window->screen->n_xinerama_infos - 1; j++) {
+    edges[i] = window->screen->xinerama_infos[j].x_origin +
+      window->screen->xinerama_infos[j].width;
+    ++i;
+  }
+  
   meta_window_get_outer_rect (window, &rect);
   
   /* get window edges */
@@ -612,7 +619,7 @@ get_horizontal_edges (MetaWindow *window,
   GSList *tmp;
   int n_windows;
   int *edges;
-  int i;
+  int i, j;
   int n_edges;
   MetaRectangle rect;
   MetaRectangle work_area;
@@ -620,7 +627,7 @@ get_horizontal_edges (MetaWindow *window,
   windows = get_windows_on_same_workspace (window, &n_windows);
 
   i = 0;
-  n_edges = n_windows * 2 + 4; /* 4 = workspace/screen edges */
+  n_edges = n_windows * 2 + 4 + window->screen->n_xinerama_infos - 1; /* 4 = workspace/screen edges */
   edges = g_new (int, n_edges);
 
   /* workspace/screen edges */
@@ -639,6 +646,13 @@ get_horizontal_edges (MetaWindow *window,
 
   g_assert (i == 4);
   
+  /* Now get the xinerama screen edges */
+  for (j = 0; j < window->screen->n_xinerama_infos - 1; j++) {
+    edges[i] = window->screen->xinerama_infos[j].y_origin +
+      window->screen->xinerama_infos[j].height;
+    ++i;
+  }
+
   meta_window_get_outer_rect (window, &rect);
   
   /* get window edges */

src/screen.c

@@ -800,6 +800,74 @@ meta_screen_focus_top_window (MetaScreen *screen,
     }
 }
 
+static gboolean
+meta_rectangle_intersect (MetaRectangle *src1,
+			  MetaRectangle *src2,
+			  MetaRectangle *dest)
+{
+  int dest_x, dest_y;
+  int dest_w, dest_h;
+  int return_val;
+
+  g_return_val_if_fail (src1 != NULL, FALSE);
+  g_return_val_if_fail (src2 != NULL, FALSE);
+  g_return_val_if_fail (dest != NULL, FALSE);
+
+  return_val = FALSE;
+
+  dest_x = MAX (src1->x, src2->x);
+  dest_y = MAX (src1->y, src2->y);
+  dest_w = MIN (src1->x + src1->width, src2->x + src2->width) - dest_x;
+  dest_h = MIN (src1->y + src1->height, src2->y + src2->height) - dest_y;
+  
+  if (dest_w > 0 && dest_h > 0)
+    {
+      dest->x = dest_x;
+      dest->y = dest_y;
+      dest->width = dest_w;
+      dest->height = dest_h;
+      return_val = TRUE;
+    }
+  else
+    {
+      dest->width = 0;
+      dest->height = 0;
+    }
+
+  return return_val;
+}
+
+const MetaXineramaScreenInfo*
+meta_screen_get_xinerama_for_window (MetaScreen *screen,
+				     MetaWindow *window)
+{
+  int i;
+  int best_xinerama, xinerama_score;
+
+  best_xinerama = 0;
+  xinerama_score = 0;
+  
+  for (i = 0; i < screen->n_xinerama_infos; i++) {
+    MetaRectangle dest, screen_info;
+
+    screen_info.x = screen->xinerama_infos[i].x_origin;
+    screen_info.y = screen->xinerama_infos[i].y_origin;
+    screen_info.width = screen->xinerama_infos[i].width;
+    screen_info.height = screen->xinerama_infos[i].height;
+
+    if (meta_rectangle_intersect (&screen_info, &window->rect, &dest))
+      {
+	if (dest.width * dest.height > xinerama_score)
+	  {
+	    xinerama_score = dest.width * dest.height;
+	    best_xinerama = i;
+	  }
+      }
+  }
+
+  return &screen->xinerama_infos[best_xinerama];
+}
+
 const MetaXineramaScreenInfo*
 meta_screen_get_current_xinerama (MetaScreen *screen)
 {

src/screen.h

@@ -95,6 +95,8 @@ void          meta_screen_focus_top_window    (MetaScreen                 *scree
                                                MetaWindow                 *not_this_one);
 
 const MetaXineramaScreenInfo* meta_screen_get_current_xinerama (MetaScreen *screen);
+const MetaXineramaScreenInfo* meta_screen_get_xinerama_for_window (MetaScreen *screen,
+								   MetaWindow *window);
 
 void          meta_screen_update_workspace_layout (MetaScreen             *screen);