Add new files.

2006-03-21  Anders Carlsson  <andersca@imendio.com>

        * gtk/Makefile.am:
        Add new files.

        * gtk/gtkclipboard-quartz.c: Added.
        * gtk/gtkdnd-quartz.c: Added.
        * gtk/gtkquartz.c: Added.
        * gtk/gtkquartz.h: Added.
        Add dnd and clipboard implementations.

1 files changed, 1264 insertions, 0 deletions

diff --git a/gtk/gtkclipboard-quartz.c b/gtk/gtkclipboard-quartz.c
new file mode 100644
index 0000000000..9a79c25947
--- /dev/null
+++ b/gtk/gtkclipboard-quartz.c
@@ -0,0 +1,1264 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2000 Red Hat, Inc.
+ * Copyright (C) 2004 Nokia Corporation
+ * Copyright (C) 2006 Imendio AB
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include <config.h>
+#include <string.h>
+
+#import <Cocoa/Cocoa.h>
+
+#include "gtkclipboard.h"
+#include "gtkinvisible.h"
+#include "gtkmain.h"
+#include "gtkmarshalers.h"
+#include "gtkintl.h"
+#include "gtkalias.h"
+#include "gtktextbuffer.h"
+
+#include "gtkquartz.h"
+
+enum {
+  OWNER_CHANGE,
+  LAST_SIGNAL
+};
+
+typedef struct _GtkClipboardClass GtkClipboardClass;
+
+struct _GtkClipboard 
+{
+  GObject parent_instance;
+
+  NSPasteboard *pasteboard;
+
+  GdkAtom selection;
+
+  GtkClipboardGetFunc get_func;
+  GtkClipboardClearFunc clear_func;
+  gpointer user_data;
+  gboolean have_owner;
+
+  gboolean have_selection;
+  GdkDisplay *display;
+
+  GdkAtom *cached_targets;
+  gint     n_cached_targets;
+
+  guint      notify_signal_id;
+  gboolean   storing_selection;
+  GMainLoop *store_loop;
+  guint      store_timeout;
+  gint       n_storable_targets;
+  GdkAtom   *storable_targets;
+};
+
+struct _GtkClipboardClass
+{
+  GObjectClass parent_class;
+
+  void (*owner_change) (GtkClipboard        *clipboard,
+			GdkEventOwnerChange *event);
+};
+
+@interface GtkClipboardOwner : NSObject {
+  GtkClipboard *clipboard;
+
+  GtkClipboardGetFunc get_func;
+  GtkClipboardClearFunc clear_func;
+  gpointer user_data;
+  
+}
+
+@end
+
+@implementation GtkClipboardOwner
+-(void)pasteboard:(NSPasteboard *)sender provideDataForType:(NSString *)type
+{
+  GtkSelectionData selection_data;
+
+  selection_data.selection = clipboard->selection;
+  selection_data.data = NULL;
+  selection_data.target = _gtk_quartz_pasteboard_type_to_atom (type);
+
+  /* FIXME: We need to find out what the info argument should be
+   * here by storing it in the clipboard object in
+   * gtk_clipboard_set_contents
+   */
+  clipboard->get_func (clipboard, &selection_data, 0, clipboard->user_data);
+
+  _gtk_quartz_set_selection_data_for_pasteboard (clipboard->pasteboard, &selection_data);
+
+  g_free (selection_data.data);
+
+  NSLog(@"Provide data for %@", type);
+}
+
+- (void)pasteboardChangedOwner:(NSPasteboard *)sender
+{
+  if (clear_func)
+    clear_func (clipboard, user_data);
+
+  [self release];
+}
+
+- (id)initWithClipboard:(GtkClipboard *)aClipboard
+{
+  self = [super init];
+
+  if (self) 
+    {
+      clipboard = aClipboard;
+    }
+
+  return self;
+}
+
+@end
+
+static void gtk_clipboard_class_init   (GtkClipboardClass   *class);
+static void gtk_clipboard_finalize     (GObject             *object);
+static void gtk_clipboard_owner_change (GtkClipboard        *clipboard,
+					GdkEventOwnerChange *event);
+
+static void          clipboard_unset      (GtkClipboard     *clipboard);
+static GtkClipboard *clipboard_peek       (GdkDisplay       *display,
+					   GdkAtom           selection,
+					   gboolean          only_if_exists);
+
+static const gchar clipboards_owned_key[] = "gtk-clipboards-owned";
+static GQuark clipboards_owned_key_id = 0;
+
+static GObjectClass *parent_class;
+static guint         clipboard_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gtk_clipboard_get_type (void)
+{
+  static GType clipboard_type = 0;
+  
+  if (!clipboard_type)
+    {
+      static const GTypeInfo clipboard_info =
+      {
+	sizeof (GtkClipboardClass),
+	NULL,           /* base_init */
+	NULL,           /* base_finalize */
+	(GClassInitFunc) gtk_clipboard_class_init,
+	NULL,           /* class_finalize */
+	NULL,           /* class_data */
+	sizeof (GtkClipboard),
+	0,              /* n_preallocs */
+	(GInstanceInitFunc) NULL,
+      };
+      
+      clipboard_type = g_type_register_static (G_TYPE_OBJECT, I_("GtkClipboard"),
+					       &clipboard_info, 0);
+    }
+  
+  return clipboard_type;
+}
+
+static void
+gtk_clipboard_class_init (GtkClipboardClass *class)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+
+  parent_class = g_type_class_peek_parent (class);
+  
+  gobject_class->finalize = gtk_clipboard_finalize;
+
+  class->owner_change = gtk_clipboard_owner_change;
+
+  clipboard_signals[OWNER_CHANGE] =
+    g_signal_new (I_("owner_change"),
+		  G_TYPE_FROM_CLASS (gobject_class),
+		  G_SIGNAL_RUN_FIRST,
+		  G_STRUCT_OFFSET (GtkClipboardClass, owner_change),
+		  NULL, NULL,
+		  _gtk_marshal_VOID__BOXED,
+		  G_TYPE_NONE, 1,
+		  GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
+}
+
+static void
+gtk_clipboard_finalize (GObject *object)
+{
+  GtkClipboard *clipboard;
+  GSList *clipboards;
+
+  clipboard = GTK_CLIPBOARD (object);
+
+  clipboards = g_object_get_data (G_OBJECT (clipboard->display), "gtk-clipboard-list");
+  if (g_slist_index (clipboards, clipboard) >= 0)
+    g_warning ("GtkClipboard prematurely finalized");
+
+  clipboard_unset (clipboard);
+  
+  clipboards = g_object_get_data (G_OBJECT (clipboard->display), "gtk-clipboard-list");
+  clipboards = g_slist_remove (clipboards, clipboard);
+  g_object_set_data (G_OBJECT (clipboard->display), I_("gtk-clipboard-list"), clipboards);
+
+  if (clipboard->store_loop && g_main_loop_is_running (clipboard->store_loop))
+    g_main_loop_quit (clipboard->store_loop);
+
+  if (clipboard->store_timeout != 0)
+    g_source_remove (clipboard->store_timeout);
+
+  g_free (clipboard->storable_targets);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+clipboard_display_closed (GdkDisplay   *display,
+			  gboolean      is_error,
+			  GtkClipboard *clipboard)
+{
+  GSList *clipboards;
+
+  clipboards = g_object_get_data (G_OBJECT (display), "gtk-clipboard-list");
+  g_object_run_dispose (G_OBJECT (clipboard));
+  clipboards = g_slist_remove (clipboards, clipboard);
+  g_object_set_data (G_OBJECT (display), I_("gtk-clipboard-list"), clipboards);
+  g_object_unref (clipboard);
+}
+
+/**
+ * gtk_clipboard_get_for_display:
+ * @display: the display for which the clipboard is to be retrieved or created
+ * @selection: a #GdkAtom which identifies the clipboard
+ *             to use.
+ * 
+ * Returns the clipboard object for the given selection.
+ * Cut/copy/paste menu items and keyboard shortcuts should use
+ * the default clipboard, returned by passing %GDK_SELECTION_CLIPBOARD for @selection.
+ * (%GDK_NONE is supported as a synonym for GDK_SELECTION_CLIPBOARD
+ * for backwards compatibility reasons.)
+ * The currently-selected object or text should be provided on the clipboard
+ * identified by #GDK_SELECTION_PRIMARY. Cut/copy/paste menu items
+ * conceptually copy the contents of the #GDK_SELECTION_PRIMARY clipboard
+ * to the default clipboard, i.e. they copy the selection to what the
+ * user sees as the clipboard.
+ *
+ * (Passing #GDK_NONE is the same as using <literal>gdk_atom_intern
+ * ("CLIPBOARD", FALSE)</literal>. See <ulink
+ * url="http://www.freedesktop.org/Standards/clipboards-spec">
+ * http://www.freedesktop.org/Standards/clipboards-spec</ulink>
+ * for a detailed discussion of the "CLIPBOARD" vs. "PRIMARY"
+ * selections under the X window system. On Win32 the
+ * #GDK_SELECTION_PRIMARY clipboard is essentially ignored.)
+ *
+ * It's possible to have arbitrary named clipboards; if you do invent
+ * new clipboards, you should prefix the selection name with an
+ * underscore (because the ICCCM requires that nonstandard atoms are
+ * underscore-prefixed), and namespace it as well. For example,
+ * if your application called "Foo" has a special-purpose
+ * clipboard, you might call it "_FOO_SPECIAL_CLIPBOARD".
+ * 
+ * Return value: the appropriate clipboard object. If no
+ *             clipboard already exists, a new one will
+ *             be created. Once a clipboard object has
+ *             been created, it is persistent and, since
+ *             it is owned by GTK+, must not be freed or
+ *             unrefd.
+ *
+ * Since: 2.2
+ **/
+GtkClipboard *
+gtk_clipboard_get_for_display (GdkDisplay *display, 
+			       GdkAtom     selection)
+{
+  g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
+  g_return_val_if_fail (!display->closed, NULL);
+
+  return clipboard_peek (display, selection, FALSE);
+}
+
+
+/**
+ * gtk_clipboard_get():
+ * @selection: a #GdkAtom which identifies the clipboard
+ *             to use.
+ * 
+ * Returns the clipboard object for the given selection.
+ * See gtk_clipboard_get_for_display() for complete details.
+ * 
+ * Return value: the appropriate clipboard object. If no
+ *             clipboard already exists, a new one will
+ *             be created. Once a clipboard object has
+ *             been created, it is persistent and, since
+ *             it is owned by GTK+, must not be freed or
+ *             unrefd.
+ **/
+GtkClipboard *
+gtk_clipboard_get (GdkAtom selection)
+{
+  return gtk_clipboard_get_for_display (gdk_display_get_default (), selection);
+}
+
+static void
+clipboard_owner_destroyed (gpointer data)
+{
+  GSList *clipboards = data;
+  GSList *tmp_list;
+
+  tmp_list = clipboards;
+  while (tmp_list)
+    {
+      GtkClipboard *clipboard = tmp_list->data;
+
+      clipboard->get_func = NULL;
+      clipboard->clear_func = NULL;
+      clipboard->user_data = NULL;
+      clipboard->have_owner = FALSE;
+
+      gtk_clipboard_clear (clipboard);
+
+      tmp_list = tmp_list->next;
+    }
+  
+  g_slist_free (clipboards);
+}
+
+static void
+clipboard_add_owner_notify (GtkClipboard *clipboard)
+{
+  if (!clipboards_owned_key_id)
+    clipboards_owned_key_id = g_quark_from_static_string (clipboards_owned_key);
+  
+  if (clipboard->have_owner)
+    g_object_set_qdata_full (clipboard->user_data, clipboards_owned_key_id,
+			     g_slist_prepend (g_object_steal_qdata (clipboard->user_data,
+								    clipboards_owned_key_id),
+					      clipboard),
+			     clipboard_owner_destroyed);
+}
+
+static void
+clipboard_remove_owner_notify (GtkClipboard *clipboard)
+{
+  if (clipboard->have_owner)
+     g_object_set_qdata_full (clipboard->user_data, clipboards_owned_key_id,
+			      g_slist_remove (g_object_steal_qdata (clipboard->user_data,
+								    clipboards_owned_key_id),
+					      clipboard),
+			      clipboard_owner_destroyed);
+}
+
+static gboolean
+gtk_clipboard_set_contents (GtkClipboard         *clipboard,
+			    const GtkTargetEntry *targets,
+			    guint                 n_targets,
+			    GtkClipboardGetFunc   get_func,
+			    GtkClipboardClearFunc clear_func,
+			    gpointer              user_data,
+			    gboolean              have_owner)
+{
+  GtkClipboardOwner *owner;
+  NSArray *types;
+
+  owner = [[GtkClipboardOwner alloc] initWithClipboard:clipboard];
+  types = _gtk_quartz_target_entries_to_pasteboard_types (targets, n_targets);
+
+  clipboard->user_data = user_data;
+  clipboard->have_owner = have_owner;
+  if (have_owner)
+    clipboard_add_owner_notify (clipboard);
+  clipboard->get_func = get_func;
+  clipboard->clear_func = clear_func;
+
+  [clipboard->pasteboard declareTypes:types owner:owner];
+
+  return true;
+}
+
+/**
+ * gtk_clipboard_set_with_data:
+ * @clipboard:  a #GtkClipboard
+ * @targets:    array containing information about the available forms for the
+ *              clipboard data
+ * @n_targets:  number of elements in @targets
+ * @get_func:   function to call to get the actual clipboard data
+ * @clear_func: when the clipboard contents are set again, this function will
+ *              be called, and @get_func will not be subsequently called.
+ * @user_data:  user data to pass to @get_func and @clear_func.
+ * 
+ * Virtually sets the contents of the specified clipboard by providing
+ * a list of supported formats for the clipboard data and a function
+ * to call to get the actual data when it is requested.
+ * 
+ * Return value: %TRUE if setting the clipboard data succeeded. If setting
+ *               the clipboard data failed the provided callback functions
+ *               will be ignored.
+ **/
+gboolean
+gtk_clipboard_set_with_data (GtkClipboard          *clipboard,
+			     const GtkTargetEntry  *targets,
+			     guint                  n_targets,
+			     GtkClipboardGetFunc    get_func,
+			     GtkClipboardClearFunc  clear_func,
+			     gpointer               user_data)
+{
+  g_return_val_if_fail (clipboard != NULL, FALSE);
+  g_return_val_if_fail (targets != NULL, FALSE);
+  g_return_val_if_fail (get_func != NULL, FALSE);
+
+  return gtk_clipboard_set_contents (clipboard, targets, n_targets,
+				     get_func, clear_func, user_data,
+				     FALSE);
+}
+
+/**
+ * gtk_clipboard_set_with_owner:
+ * @clipboard:  a #GtkClipboard
+ * @targets:    array containing information about the available forms for the
+ *              clipboard data
+ * @n_targets:  number of elements in @targets
+ * @get_func:   function to call to get the actual clipboard data
+ * @clear_func: when the clipboard contents are set again, this function will
+ *              be called, and @get_func will not be subsequently called.
+ * @owner:      an object that "owns" the data. This object will be passed
+ *              to the callbacks when called. 
+ * 
+ * Virtually sets the contents of the specified clipboard by providing
+ * a list of supported formats for the clipboard data and a function
+ * to call to get the actual data when it is requested.
+ *
+ * The difference between this function and gtk_clipboard_set_with_data()
+ * is that instead of an generic @user_data pointer, a #GObject is passed
+ * in. 
+ * 
+ * Return value: %TRUE if setting the clipboard data succeeded. If setting
+ *               the clipboard data failed the provided callback functions
+ *               will be ignored.
+ **/
+gboolean
+gtk_clipboard_set_with_owner (GtkClipboard          *clipboard,
+			      const GtkTargetEntry  *targets,
+			      guint                  n_targets,
+			      GtkClipboardGetFunc    get_func,
+			      GtkClipboardClearFunc  clear_func,
+			      GObject               *owner)
+{
+  g_return_val_if_fail (clipboard != NULL, FALSE);
+  g_return_val_if_fail (targets != NULL, FALSE);
+  g_return_val_if_fail (get_func != NULL, FALSE);
+  g_return_val_if_fail (G_IS_OBJECT (owner), FALSE);
+
+  return gtk_clipboard_set_contents (clipboard, targets, n_targets,
+				     get_func, clear_func, owner,
+				     TRUE);
+}
+
+/**
+ * gtk_clipboard_get_owner:
+ * @clipboard: a #GtkClipboard
+ * 
+ * If the clipboard contents callbacks were set with 
+ * gtk_clipboard_set_with_owner(), and the gtk_clipboard_set_with_data() or 
+ * gtk_clipboard_clear() has not subsequently called, returns the owner set 
+ * by gtk_clipboard_set_with_owner().
+ * 
+ * Return value: the owner of the clipboard, if any; otherwise %NULL.
+ **/
+GObject *
+gtk_clipboard_get_owner (GtkClipboard *clipboard)
+{
+  g_return_val_if_fail (clipboard != NULL, NULL);
+
+  if (clipboard->have_owner)
+    return clipboard->user_data;
+  else
+    return NULL;
+}
+
+static void
+clipboard_unset (GtkClipboard *clipboard)
+{
+  GtkClipboardClearFunc old_clear_func;
+  gpointer old_data;
+  gboolean old_have_owner;
+  gint old_n_storable_targets;
+  
+  old_clear_func = clipboard->clear_func;
+  old_data = clipboard->user_data;
+  old_have_owner = clipboard->have_owner;
+  old_n_storable_targets = clipboard->n_storable_targets;
+  
+  if (old_have_owner)
+    {
+      clipboard->have_owner = FALSE;
+    }
+
+  clipboard->n_storable_targets = -1;
+  g_free (clipboard->storable_targets);
+  clipboard->storable_targets = NULL;
+      
+  clipboard->get_func = NULL;
+  clipboard->clear_func = NULL;
+  clipboard->user_data = NULL;
+  
+  if (old_clear_func)
+    old_clear_func (clipboard, old_data);
+
+  /* If we've transferred the clipboard data to the manager,
+   * unref the owner
+   */
+  if (old_have_owner &&
+      old_n_storable_targets != -1)
+    g_object_unref (old_data);
+}
+
+/**
+ * gtk_clipboard_clear:
+ * @clipboard:  a #GtkClipboard
+ * 
+ * Clears the contents of the clipboard. Generally this should only
+ * be called between the time you call gtk_clipboard_set_with_owner()
+ * or gtk_clipboard_set_with_data(),
+ * and when the @clear_func you supplied is called. Otherwise, the
+ * clipboard may be owned by someone else.
+ **/
+void
+gtk_clipboard_clear (GtkClipboard *clipboard)
+{
+  [clipboard->pasteboard declareTypes:nil owner:nil];
+}
+
+static void 
+text_get_func (GtkClipboard     *clipboard,
+	       GtkSelectionData *selection_data,
+	       guint             info,
+	       gpointer          data)
+{
+  gtk_selection_data_set_text (selection_data, data, -1);
+}
+
+static void 
+text_clear_func (GtkClipboard *clipboard,
+		 gpointer      data)
+{
+  g_free (data);
+}
+
+/**
+ * gtk_clipboard_set_text:
+ * @clipboard: a #GtkClipboard object
+ * @text:      a UTF-8 string.
+ * @len:       length of @text, in bytes, or -1, in which case
+ *             the length will be determined with <function>strlen()</function>.
+ * 
+ * Sets the contents of the clipboard to the given UTF-8 string. GTK+ will
+ * make a copy of the text and take responsibility for responding
+ * for requests for the text, and for converting the text into
+ * the requested format.
+ **/
+void 
+gtk_clipboard_set_text (GtkClipboard *clipboard,
+			const gchar  *text,
+			gint          len)
+{
+  GtkTargetEntry target = { "UTF8_STRING", 0, 0 };
+
+  g_return_if_fail (clipboard != NULL);
+  g_return_if_fail (text != NULL);
+  
+  if (len < 0)
+    len = strlen (text);
+  
+  gtk_clipboard_set_with_data (clipboard, 
+			       &target, 1,
+			       text_get_func, text_clear_func,
+			       g_strndup (text, len));
+  gtk_clipboard_set_can_store (clipboard, NULL, 0);
+}
+
+
+static void 
+pixbuf_get_func (GtkClipboard     *clipboard,
+		 GtkSelectionData *selection_data,
+		 guint             info,
+		 gpointer          data)
+{
+  gtk_selection_data_set_pixbuf (selection_data, data);
+}
+
+static void 
+pixbuf_clear_func (GtkClipboard *clipboard,
+		   gpointer      data)
+{
+  g_object_unref (data);
+}
+
+/**
+ * gtk_clipboard_set_image:
+ * @clipboard: a #GtkClipboard object
+ * @pixbuf:    a #GdkPixbuf 
+ * 
+ * Sets the contents of the clipboard to the given #GdkPixbuf. 
+ * GTK+ will take responsibility for responding for requests 
+ * for the image, and for converting the image into the 
+ * requested format.
+ * 
+ * Since: 2.6
+ **/
+void
+gtk_clipboard_set_image (GtkClipboard *clipboard,
+			 GdkPixbuf    *pixbuf)
+{
+  GtkTargetList *list;
+  GList *l;
+  GtkTargetEntry *targets;
+  gint n_targets, i;
+
+  g_return_if_fail (clipboard != NULL);
+  g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+
+  list = gtk_target_list_new (NULL, 0);
+  gtk_target_list_add_image_targets (list, 0, TRUE);
+
+  n_targets = g_list_length (list->list);
+  targets = g_new0 (GtkTargetEntry, n_targets);
+  for (l = list->list, i = 0; l; l = l->next, i++)
+    {
+      GtkTargetPair *pair = (GtkTargetPair *)l->data;
+      targets[i].target = gdk_atom_name (pair->target);
+    }
+
+  gtk_clipboard_set_with_data (clipboard, 
+			       targets, n_targets,
+			       pixbuf_get_func, pixbuf_clear_func,
+			       g_object_ref (pixbuf));
+  gtk_clipboard_set_can_store (clipboard, NULL, 0);
+
+  for (i = 0; i < n_targets; i++)
+    g_free (targets[i].target);
+  g_free (targets);
+  gtk_target_list_unref (list);
+}
+
+/**
+ * gtk_clipboard_request_contents:
+ * @clipboard: a #GtkClipboard
+ * @target:    an atom representing the form into which the clipboard
+ *             owner should convert the selection.
+ * @callback:  A function to call when the results are received
+ *             (or the retrieval fails). If the retrieval fails
+ *             the length field of @selection_data will be
+ *             negative.
+ * @user_data: user data to pass to @callback
+ * 
+ * Requests the contents of clipboard as the given target.
+ * When the results of the result are later received the supplied callback
+ * will be called.
+ **/
+void 
+gtk_clipboard_request_contents (GtkClipboard            *clipboard,
+				GdkAtom                  target,
+				GtkClipboardReceivedFunc callback,
+				gpointer                 user_data)
+{
+  GtkSelectionData *data;
+
+  data = gtk_clipboard_wait_for_contents (clipboard, target);
+
+  callback (clipboard, data, user_data);
+
+  gtk_selection_data_free (data);
+}
+
+/**
+ * gtk_clipboard_request_text:
+ * @clipboard: a #GtkClipboard
+ * @callback:  a function to call when the text is received,
+ *             or the retrieval fails. (It will always be called
+ *             one way or the other.)
+ * @user_data: user data to pass to @callback.
+ * 
+ * Requests the contents of the clipboard as text. When the text is
+ * later received, it will be converted to UTF-8 if necessary, and
+ * @callback will be called. 
+ *
+ * The @text parameter to @callback will contain the resulting text if
+ * the request succeeded, or %NULL if it failed. This could happen for
+ * various reasons, in particular if the clipboard was empty or if the
+ * contents of the clipboard could not be converted into text form.
+ **/
+void 
+gtk_clipboard_request_text (GtkClipboard                *clipboard,
+			    GtkClipboardTextReceivedFunc callback,
+			    gpointer                     user_data)
+{
+  gchar *data = gtk_clipboard_wait_for_text (clipboard);
+
+  callback (clipboard, data, user_data);
+
+  g_free (data);
+}
+
+void
+gtk_clipboard_request_rich_text (GtkClipboard                    *clipboard,
+                                 GtkTextBuffer                   *buffer,
+                                 GtkClipboardRichTextReceivedFunc callback,
+                                 gpointer                         user_data)
+{
+  /* FIXME: Implement */
+}
+
+/**
+ * gtk_clipboard_request_image:
+ * @clipboard: a #GtkClipboard
+ * @callback:  a function to call when the image is received,
+ *             or the retrieval fails. (It will always be called
+ *             one way or the other.)
+ * @user_data: user data to pass to @callback.
+ * 
+ * Requests the contents of the clipboard as image. When the image is
+ * later received, it will be converted to a #GdkPixbuf, and
+ * @callback will be called. 
+ *
+ * The @pixbuf parameter to @callback will contain the resulting 
+ * #GdkPixbuf if the request succeeded, or %NULL if it failed. This 
+ * could happen for various reasons, in particular if the clipboard 
+ * was empty or if the contents of the clipboard could not be 
+ * converted into an image.
+ *
+ * Since: 2.6
+ **/
+void 
+gtk_clipboard_request_image (GtkClipboard                  *clipboard,
+			     GtkClipboardImageReceivedFunc  callback,
+			     gpointer                       user_data)
+{
+  GdkPixbuf *pixbuf = gtk_clipboard_wait_for_image (clipboard);
+
+  callback (clipboard, pixbuf, user_data);
+
+  if (pixbuf)
+    g_object_unref (pixbuf);
+}
+
+/**
+ * gtk_clipboard_request_targets:
+ * @clipboard: a #GtkClipboard
+ * @callback:  a function to call when the targets are received,
+ *             or the retrieval fails. (It will always be called
+ *             one way or the other.)
+ * @user_data: user data to pass to @callback.
+ * 
+ * Requests the contents of the clipboard as list of supported targets. 
+ * When the list is later received, @callback will be called. 
+ *
+ * The @targets parameter to @callback will contain the resulting targets if
+ * the request succeeded, or %NULL if it failed.
+ *
+ * Since: 2.4
+ **/
+void 
+gtk_clipboard_request_targets (GtkClipboard                *clipboard,
+			       GtkClipboardTargetsReceivedFunc callback,
+			       gpointer                     user_data)
+{
+  GdkAtom *targets;
+  gint n_targets;
+
+  gtk_clipboard_wait_for_targets (clipboard, &targets, &n_targets);
+
+  callback (clipboard, targets, n_targets, user_data);
+}
+
+
+/**
+ * gtk_clipboard_wait_for_contents:
+ * @clipboard: a #GtkClipboard
+ * @target: an atom representing the form into which the clipboard
+ *          owner should convert the selection.
+ * 
+ * Requests the contents of the clipboard using the given target.
+ * This function waits for the data to be received using the main 
+ * loop, so events, timeouts, etc, may be dispatched during the wait.
+ * 
+ * Return value: a newly-allocated #GtkSelectionData object or %NULL
+ *               if retrieving the given target failed. If non-%NULL,
+ *               this value must be freed with gtk_selection_data_free() 
+ *               when you are finished with it.
+ **/
+GtkSelectionData *
+gtk_clipboard_wait_for_contents (GtkClipboard *clipboard,
+				 GdkAtom       target)
+{
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  gchar *name;
+  NSData *data;
+  GtkSelectionData *selection_data = NULL;
+
+  if (target == gdk_atom_intern_static_string ("TARGETS")) 
+    {
+      NSArray *types = [clipboard->pasteboard types];
+      int i, count;
+      GList *atom_list, *l;
+      GdkAtom *atoms;
+
+      count = [types count];
+      atom_list = _gtk_quartz_pasteboard_types_to_atom_list (types);
+      
+      selection_data = g_new (GtkSelectionData, 1);
+      selection_data->selection = clipboard->selection;
+      selection_data->target = target;
+      selection_data->type = GDK_SELECTION_TYPE_ATOM;
+      selection_data->format = 32;
+      selection_data->length = count * sizeof (GdkAtom);
+
+      atoms = g_malloc (selection_data->length + 1);
+      
+      for (l = atom_list, i = 0; l ; l = l->next, i++)
+	atoms[i] = GDK_POINTER_TO_ATOM (l->data);
+
+      selection_data->data = (guchar *)atoms;
+      selection_data->data[selection_data->length] = '\0';
+
+      [pool release];
+
+      g_list_free (atom_list);
+      return selection_data;
+    }
+
+  selection_data = _gtk_quartz_get_selection_data_from_pasteboard (clipboard->pasteboard,
+								   target,
+								   clipboard->selection);
+
+  [pool release];
+  return selection_data;
+}
+
+/**
+ * gtk_clipboard_wait_for_text:
+ * @clipboard: a #GtkClipboard
+ * 
+ * Requests the contents of the clipboard as text and converts
+ * the result to UTF-8 if necessary. This function waits for
+ * the data to be received using the main loop, so events,
+ * timeouts, etc, may be dispatched during the wait.
+ * 
+ * Return value: a newly-allocated UTF-8 string which must
+ *               be freed with g_free(), or %NULL if retrieving
+ *               the selection data failed. (This could happen
+ *               for various reasons, in particular if the
+ *               clipboard was empty or if the contents of the
+ *               clipboard could not be converted into text form.)
+ **/
+gchar *
+gtk_clipboard_wait_for_text (GtkClipboard *clipboard)
+{
+  GtkSelectionData *data;
+  gchar *result;
+
+  data = gtk_clipboard_wait_for_contents (clipboard, 
+					  gdk_atom_intern_static_string ("UTF8_STRING"));
+
+  result = (gchar *)gtk_selection_data_get_text (data);
+
+  gtk_selection_data_free (data);
+
+  return result;
+}
+
+/**
+ * gtk_clipboard_wait_for_image:
+ * @clipboard: a #GtkClipboard
+ * 
+ * Requests the contents of the clipboard as image and converts
+ * the result to a #GdkPixbuf. This function waits for
+ * the data to be received using the main loop, so events,
+ * timeouts, etc, may be dispatched during the wait.
+ * 
+ * Return value: a newly-allocated #GdkPixbuf object which must
+ *               be disposed with g_object_unref(), or %NULL if 
+ *               retrieving the selection data failed. (This 
+ *               could happen for various reasons, in particular 
+ *               if the clipboard was empty or if the contents of 
+ *               the clipboard could not be converted into an image.)
+ *
+ * Since: 2.6
+ **/
+GdkPixbuf *
+gtk_clipboard_wait_for_image (GtkClipboard *clipboard)
+{
+  const gchar *priority[] = { "image/png", "image/tiff", "image/jpeg", "image/gif", "image/bmp" };
+  int i;
+  GtkSelectionData *data;
+
+  for (i = 0; i < G_N_ELEMENTS (priority); i++) 
+    {    
+      data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string (priority[i]));
+
+      if (data)
+	{
+	  GdkPixbuf *pixbuf = gtk_selection_data_get_pixbuf (data);
+
+	  gtk_selection_data_free (data);
+
+	  return pixbuf;
+	}  
+  }
+
+  return NULL;
+}
+
+/**
+ * gtk_clipboard_get_display:
+ * @clipboard: a #GtkClipboard
+ *
+ * Gets the #GdkDisplay associated with @clipboard
+ *
+ * Return value: the #GdkDisplay associated with @clipboard
+ *
+ * Since: 2.2
+ **/
+GdkDisplay *
+gtk_clipboard_get_display (GtkClipboard *clipboard)
+{
+  g_return_val_if_fail (clipboard != NULL, NULL);
+
+  return clipboard->display;
+}
+
+/**
+ * gtk_clipboard_wait_is_text_available:
+ * @clipboard: a #GtkClipboard
+ * 
+ * Test to see if there is text available to be pasted
+ * This is done by requesting the TARGETS atom and checking
+ * if it contains any of the supported text targets. This function 
+ * waits for the data to be received using the main loop, so events, 
+ * timeouts, etc, may be dispatched during the wait.
+ *
+ * This function is a little faster than calling
+ * gtk_clipboard_wait_for_text() since it doesn't need to retrieve
+ * the actual text.
+ * 
+ * Return value: %TRUE is there is text available, %FALSE otherwise.
+ **/
+gboolean
+gtk_clipboard_wait_is_text_available (GtkClipboard *clipboard)
+{
+  GtkSelectionData *data;
+  gboolean result = FALSE;
+
+  data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
+  if (data)
+    {
+      result = gtk_selection_data_targets_include_text (data);
+      gtk_selection_data_free (data);
+    }
+
+  return result;
+}
+
+gboolean
+gtk_clipboard_wait_is_rich_text_available (GtkClipboard  *clipboard,
+                                           GtkTextBuffer *buffer)
+{
+  GtkSelectionData *data;
+  gboolean result = FALSE;
+
+  g_return_val_if_fail (GTK_IS_CLIPBOARD (clipboard), FALSE);
+  g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
+
+  data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
+  if (data)
+    {
+      result = gtk_selection_data_targets_include_rich_text (data, buffer);
+      gtk_selection_data_free (data);
+    }
+
+  return result;
+}
+
+gboolean
+gtk_clipboard_wait_is_image_available (GtkClipboard *clipboard)
+{
+  GtkSelectionData *data;
+  gboolean result = FALSE;
+
+  data = gtk_clipboard_wait_for_contents (clipboard, 
+					  gdk_atom_intern_static_string ("TARGETS"));
+  if (data)
+    {
+      result = gtk_selection_data_targets_include_image (data, FALSE);
+      gtk_selection_data_free (data);
+    }
+
+  return result;
+}
+
+/**
+ * gtk_clipboard_wait_for_targets
+ * @clipboard: a #GtkClipboard
+ * @targets: location to store an array of targets. The result
+ *           stored here must be freed with g_free().
+ * @n_targets: location to store number of items in @targets.
+ *
+ * Returns a list of targets that are present on the clipboard, or %NULL
+ * if there aren't any targets available. The returned list must be 
+ * freed with g_free().
+ * This function waits for the data to be received using the main 
+ * loop, so events, timeouts, etc, may be dispatched during the wait.
+ *
+ * Return value: %TRUE if any targets are present on the clipboard,
+ *               otherwise %FALSE.
+ *
+ * Since: 2.4
+ */
+gboolean
+gtk_clipboard_wait_for_targets (GtkClipboard  *clipboard, 
+				GdkAtom      **targets,
+				gint          *n_targets)
+{
+  GtkSelectionData *data;
+  gboolean result = FALSE;
+  
+  g_return_val_if_fail (clipboard != NULL, FALSE);
+
+  /* If the display supports change notification we cache targets */
+  if (gdk_display_supports_selection_notification (gtk_clipboard_get_display (clipboard)) &&
+      clipboard->n_cached_targets != -1)
+    {
+      if (n_targets)
+ 	*n_targets = clipboard->n_cached_targets;
+ 
+      if (targets)
+ 	*targets = g_memdup (clipboard->cached_targets,
+ 			     clipboard->n_cached_targets * sizeof (GdkAtom));
+
+       return TRUE;
+    }
+  
+  if (n_targets)
+    *n_targets = 0;
+      
+  if (targets)
+    *targets = NULL;      
+
+  data = gtk_clipboard_wait_for_contents (clipboard, gdk_atom_intern_static_string ("TARGETS"));
+
+  if (data)
+    {
+      GdkAtom *tmp_targets;
+      gint tmp_n_targets;
+       
+      result = gtk_selection_data_get_targets (data, &tmp_targets, &tmp_n_targets);
+ 
+      if (gdk_display_supports_selection_notification (gtk_clipboard_get_display (clipboard)))
+ 	{
+ 	  clipboard->n_cached_targets = tmp_n_targets;
+ 	  clipboard->cached_targets = g_memdup (tmp_targets,
+ 						tmp_n_targets * sizeof (GdkAtom));
+ 	}
+ 
+      if (n_targets)
+ 	*n_targets = tmp_n_targets;
+ 
+      if (targets)
+ 	*targets = tmp_targets;
+      else
+ 	g_free (tmp_targets);
+      
+      gtk_selection_data_free (data);
+    }
+
+  return result;
+}
+
+static GtkClipboard *
+clipboard_peek (GdkDisplay *display, 
+		GdkAtom     selection,
+		gboolean    only_if_exists)
+{
+  GtkClipboard *clipboard = NULL;
+  GSList *clipboards;
+  GSList *tmp_list;
+
+  if (selection == GDK_NONE)
+    selection = GDK_SELECTION_CLIPBOARD;
+
+  clipboards = g_object_get_data (G_OBJECT (display), "gtk-clipboard-list");
+
+  tmp_list = clipboards;
+  while (tmp_list)
+    {
+      clipboard = tmp_list->data;
+      if (clipboard->selection == selection)
+	break;
+
+      tmp_list = tmp_list->next;
+    }
+
+  if (!tmp_list && !only_if_exists)
+    {
+      NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+      NSString *pasteboard_name;
+      clipboard = g_object_new (GTK_TYPE_CLIPBOARD, NULL);
+
+      if (selection == GDK_SELECTION_CLIPBOARD) 
+	pasteboard_name = NSGeneralPboard;
+      else 
+	{
+	  char *atom_string = gdk_atom_name (selection);
+
+	  pasteboard_name = [NSString stringWithFormat:@"_GTK_%@", 
+			     [NSString stringWithUTF8String:atom_string]];
+	  g_free (atom_string);
+	}
+
+      clipboard->pasteboard = [NSPasteboard pasteboardWithName:pasteboard_name];
+
+      [pool release];
+
+      clipboard->selection = selection;
+      clipboard->display = display;
+      clipboard->n_cached_targets = -1;
+      clipboard->n_storable_targets = -1;
+      clipboards = g_slist_prepend (clipboards, clipboard);
+      g_object_set_data (G_OBJECT (display), I_("gtk-clipboard-list"), clipboards);
+      g_signal_connect (display, "closed",
+			G_CALLBACK (clipboard_display_closed), clipboard);
+      gdk_display_request_selection_notification (display, selection);
+    }
+  
+  return clipboard;
+}
+
+static void
+gtk_clipboard_owner_change (GtkClipboard        *clipboard,
+			    GdkEventOwnerChange *event)
+{
+  if (clipboard->n_cached_targets != -1)
+    {
+      clipboard->n_cached_targets = -1;
+      g_free (clipboard->cached_targets);
+    }
+}
+
+/**
+ * gtk_clipboard_wait_is_target_available:
+ * @clipboard: a #GtkClipboard
+ * @target:    A #GdkAtom indicating which target to look for.
+ *
+ * Checks if a clipboard supports pasting data of a given type. This
+ * function can be used to determine if a "Paste" menu item should be
+ * insensitive or not.
+ *
+ * If you want to see if there's text available on the clipboard, use
+ * gtk_clipboard_wait_is_text_available () instead.
+ *
+ * Return value: %TRUE if the target is available, %FALSE otherwise.
+ *
+ * Since: 2.6
+ */
+gboolean
+gtk_clipboard_wait_is_target_available (GtkClipboard *clipboard,
+					GdkAtom       target)
+{
+  GdkAtom *targets;
+  gint i, n_targets;
+  gboolean retval = FALSE;
+    
+  if (!gtk_clipboard_wait_for_targets (clipboard, &targets, &n_targets))
+    return FALSE;
+
+  for (i = 0; i < n_targets; i++)
+    {
+      if (targets[i] == target)
+	{
+	  retval = TRUE;
+	  break;
+	}
+    }
+
+  g_free (targets);
+  
+  return retval;
+}
+
+/**
+ * _gtk_clipboard_handle_event:
+ * @event: a owner change event
+ * 
+ * Emits the ::owner_change signal on the appropriate @clipboard.
+ *
+ * Since: 2.6
+ **/
+void 
+_gtk_clipboard_handle_event (GdkEventOwnerChange *event)
+{
+}
+
+
+/**
+ * gtk_clipboard_set_can_store:
+ * @clipboard: a #GtkClipboard
+ * @targets: array containing information about which forms should be stored
+ *           or %NULL to indicate that all forms should be stored.
+ * @n_targets: number of elements in @targets
+ *
+ * Hints that the clipboard data should be stored somewhere when the
+ * application exits or when gtk_clipboard_store () is called.
+ *
+ * This value is reset when the clipboard owner changes.
+ * Where the clipboard data is stored is platform dependent,
+ * see gdk_display_store_clipboard () for more information.
+ * 
+ * Since: 2.6
+ */
+void
+gtk_clipboard_set_can_store (GtkClipboard         *clipboard,
+ 			     const GtkTargetEntry *targets,
+ 			     gint                  n_targets)
+{
+  /* FIXME: Implement */
+}
+
+/**
+ * gtk_clipboard_store:
+ * @clipboard: a #GtkClipboard
+ *
+ * Stores the current clipboard data somewhere so that it will stay
+ * around after the application has quit.
+ *
+ * Since: 2.6
+ */
+void
+gtk_clipboard_store (GtkClipboard *clipboard)
+{
+  /* FIXME: Implement */
+}
+
+/* Stores all clipboard selections on all displays, called from
+ * gtk_main_quit ().
+ */
+void
+_gtk_clipboard_store_all (void)
+{
+  /* FIXME: Implement */
+}
+
+#define __GTK_CLIPBOARD_C__
+#include "gtkaliasdef.c"