[gtk+] Bug 596250 - Gdkcursor-quartz.c doesn't implement GDK_BLANK_CURSOR

[Kristian Rietveld <kristian src gnome org>]

commit 785e55f87ddd364f2686a3bc5ed324ec629d7ef3
Author: Kristian Rietveld <kris gtk org>
Date:   Fri Sep 25 18:16:06 2009 +0200

    Bug 596250 - Gdkcursor-quartz.c doesn't implement GDK_BLANK_CURSOR
    
    Support GDK_BLANK_CURSOR.  Patch by John Ralls.

 gdk/quartz/gdkcursor-quartz.c |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)
---
diff --git a/gdk/quartz/gdkcursor-quartz.c b/gdk/quartz/gdkcursor-quartz.c
index 2431eb8..651952f 100644
--- a/gdk/quartz/gdkcursor-quartz.c
+++ b/gdk/quartz/gdkcursor-quartz.c
@@ -45,6 +45,21 @@ gdk_quartz_cursor_new_from_nscursor (NSCursor      *nscursor,
   return cursor;
 }
 
+static GdkCursor *
+create_blank_cursor (void)
+{
+  NSCursor *nscursor;
+  NSImage *nsimage;
+  NSSize size = { 1.0, 1.0 };
+
+  nsimage = [[NSImage alloc] initWithSize:size];
+  nscursor = [[NSCursor alloc] initWithImage:nsimage
+                               hotSpot:NSMakePoint(0.0, 0.0)];
+  [nsimage release];
+
+  return gdk_quartz_cursor_new_from_nscursor (nscursor, GDK_BLANK_CURSOR);
+}
+
 static gboolean
 get_bit (const guchar *data,
          gint          width,
@@ -79,7 +94,7 @@ create_builtin_cursor (GdkCursorType cursor_type)
   NSImage *image;
   NSCursor *nscursor;
 
-  if (cursor_type >= G_N_ELEMENTS (xcursors))
+  if (cursor_type >= G_N_ELEMENTS (xcursors) || cursor_type < 0)
     return NULL;
 
   cursor = cached_xcursors[cursor_type];
@@ -210,6 +225,10 @@ gdk_cursor_new_for_display (GdkDisplay    *display,
     case GDK_HAND2:
       nscursor = [NSCursor pointingHandCursor];
       break;
+    case GDK_CURSOR_IS_PIXMAP:
+      return NULL;
+    case GDK_BLANK_CURSOR:
+      return create_blank_cursor ();
     default:
       return gdk_cursor_ref (create_builtin_cursor (cursor_type));
     }