[gtk+] wayland: Load cursors from wayland directory under XDG_DATA_DIRS

[Rob Bradford <rbradford src gnome org>]

commit 83054baa16fe957c179e72514ed83bf59e2ae09b
Author: Rob Bradford <rob linux intel com>
Date:   Mon Dec 5 17:31:50 2011 +0000

    wayland: Load cursors from wayland directory under XDG_DATA_DIRS
    
    This means we don't have to have hardcoded "/usr/share/wayland" to find the
    cursors.
    
    This change also fixes up the warning messages for when loading fails.

 gdk/wayland/gdkcursor-wayland.c |   66 ++++++++++++++++++++++++++-------------
 1 files changed, 44 insertions(+), 22 deletions(-)
---
diff --git a/gdk/wayland/gdkcursor-wayland.c b/gdk/wayland/gdkcursor-wayland.c
index 7553f05..70d368d 100644
--- a/gdk/wayland/gdkcursor-wayland.c
+++ b/gdk/wayland/gdkcursor-wayland.c
@@ -234,21 +234,19 @@ create_cursor(GdkDisplayWayland *display, GdkPixbuf *pixbuf, int x, int y)
   return GDK_CURSOR (cursor);
 }
 
-#define DATADIR "/usr/share/wayland"
-
 static const struct {
   GdkCursorType type;
   const char *filename;
   int hotspot_x, hotspot_y;
 } cursor_definitions[] = {
   { GDK_BLANK_CURSOR, NULL, 0, 0 },
-  { GDK_HAND1, DATADIR "/hand1.png", 18, 11 },
-  { GDK_HAND2, DATADIR "/hand2.png", 14,  8 },
-  { GDK_LEFT_PTR, DATADIR "/left_ptr.png", 10, 5 },
-  { GDK_SB_H_DOUBLE_ARROW, DATADIR "/sb_h_double_arrow.png", 15, 15 },
-  { GDK_SB_V_DOUBLE_ARROW, DATADIR "/sb_v_double_arrow.png", 15, 15 },
-  { GDK_XTERM, DATADIR "/xterm.png", 15, 15 },
-  { GDK_BOTTOM_RIGHT_CORNER, DATADIR "/bottom_right_corner.png", 28, 28 }
+  { GDK_HAND1, "hand1.png", 18, 11 },
+  { GDK_HAND2, "hand2.png", 14,  8 },
+  { GDK_LEFT_PTR, "left_ptr.png", 10, 5 },
+  { GDK_SB_H_DOUBLE_ARROW, "sb_h_double_arrow.png", 15, 15 },
+  { GDK_SB_V_DOUBLE_ARROW, "sb_v_double_arrow.png", 15, 15 },
+  { GDK_XTERM, "xterm.png", 15, 15 },
+  { GDK_BOTTOM_RIGHT_CORNER, "bottom_right_corner.png", 28, 28 }
 };
 
 GdkCursor *
@@ -256,7 +254,7 @@ _gdk_wayland_display_get_cursor_for_type (GdkDisplay    *display,
 					  GdkCursorType  cursor_type)
 {
   GdkDisplayWayland *wayland_display;
-  GdkPixbuf *pixbuf;
+  GdkPixbuf *pixbuf = NULL;
   GError *error = NULL;
   int i;
 
@@ -268,8 +266,8 @@ _gdk_wayland_display_get_cursor_for_type (GdkDisplay    *display,
 
   if (i == G_N_ELEMENTS (cursor_definitions))
     {
-      g_warning("unhandled cursor type %d, falling back to blank\n",
-		cursor_type);
+      g_warning ("Unhandled cursor type %d, falling back to blank\n",
+                 cursor_type);
       i = 0;
     }
 
@@ -281,20 +279,44 @@ _gdk_wayland_display_get_cursor_for_type (GdkDisplay    *display,
     return g_object_ref (wayland_display->cursors[i]);
 
   GDK_NOTE (CURSOR,
-	    g_message ("creating new cursor for type %d, filename %s",
+	    g_message ("Creating new cursor for type %d, filename %s",
 		       cursor_type, cursor_definitions[i].filename));
 
   if (cursor_type != GDK_BLANK_CURSOR)
-    pixbuf = gdk_pixbuf_new_from_file(cursor_definitions[i].filename, &error);
-  else
-    pixbuf = NULL;
-  if (error != NULL)
     {
-      GDK_NOTE (CURSOR,
-		g_message ("failed to load %s: %s",
-			   cursor_definitions[i].filename, error->message));
-      g_error_free(error);
-      return NULL;
+      const gchar * const *directories;
+      gint j;
+
+      directories = g_get_system_data_dirs();
+
+      for (j = 0; directories[j] != NULL; j++)
+        {
+          gchar *filename;
+          filename = g_build_filename (directories[j],
+                                       "wayland",
+                                       cursor_definitions[i].filename,
+                                       NULL);
+          if (g_file_test (filename, G_FILE_TEST_EXISTS))
+            {
+              pixbuf = gdk_pixbuf_new_from_file (filename, &error);
+
+              if (error != NULL)
+                {
+                  g_warning ("Failed to load cursor: %s: %s",
+                             filename, error->message);
+                  g_error_free(error);
+                  return NULL;
+                }
+              break;
+            }
+        }
+
+      if (!pixbuf)
+        {
+          g_warning ("Unable to find cursor for: %s",
+                     cursor_definitions[i].filename);
+          return NULL;
+        }
     }
 
   wayland_display->cursors[i] =