[Xfce4-commits] <xfce4-settings:master> Start using the gsd clipboard manager again (bug #7588).

Nick Schermer noreply at xfce.org
Sun May 8 11:44:03 CEST 2011


Updating branch refs/heads/master
         to 3213df6a2ecc810da22cb8d484b52dc230326a47 (commit)
       from d6afb0e936a41602e0d6139338f08bfec602ca89 (commit)

commit 3213df6a2ecc810da22cb8d484b52dc230326a47
Author: Nick Schermer <nick at xfce.org>
Date:   Sat May 7 22:16:06 2011 +0200

    Start using the gsd clipboard manager again (bug #7588).
    
    Grab the clipboard manager from gnome-settings-daemon since it
    has a better implementation of the clipboard manager spec.
    
    The code has been made suitable for xfsettingsd and use glib
    where possible (use GSList, gslice etc).

 xfsettingsd/clipboard-manager.c | 1209 ++++++++++++++++++++++++++++-----------
 xfsettingsd/clipboard-manager.h |   43 +-
 xfsettingsd/main.c              |   17 +-
 3 files changed, 920 insertions(+), 349 deletions(-)

diff --git a/xfsettingsd/clipboard-manager.c b/xfsettingsd/clipboard-manager.c
index b65ad02..d3b0290 100644
--- a/xfsettingsd/clipboard-manager.c
+++ b/xfsettingsd/clipboard-manager.c
@@ -4,7 +4,7 @@
  * Copyright (C) 2007 Anders Carlsson
  * Copyright (C) 2007 Rodrigo Moya
  * Copyright (C) 2007 William Jon McCann <mccann at jhu.edu>
- * Copyright (C) 2009-2011 Mike Massonnet <mmassonnet at xfce.org>
+ * Copyright (C) 2011 Nick Schermer <nick at xfce.org>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,441 +19,994 @@
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
  */
 
 #include "config.h"
 
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <locale.h>
+
 #include <glib.h>
+#include <glib/gi18n.h>
+#include <gdk/gdk.h>
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
 
 #include "clipboard-manager.h"
+#include "xsettings.h"
 
-struct _XfceClipboardManagerClass
+struct _GsdClipboardManagerPrivate
 {
-    GObjectClass __parent__;
+        guint    start_idle_id;
+        Display *display;
+        Window   window;
+        Time     timestamp;
+
+        GSList  *contents;
+        GSList  *conversions;
+
+        Window   requestor;
+        Atom     property;
+        Time     time;
 };
 
-struct _XfceClipboardManager
+typedef struct
+{
+        guchar *data;
+        gulong  length;
+        Atom    target;
+        Atom    type;
+        gint    format;
+        gint    refcount;
+} TargetData;
+
+typedef struct
 {
-    GObject __parent__;
+        Atom        target;
+        TargetData *data;
+        Atom        property;
+        Window      requestor;
+        gint        offset;
+} IncrConversion;
 
-    GtkClipboard *default_clipboard;
-    GtkClipboard *primary_clipboard;
+static void     gsd_clipboard_manager_finalize    (GObject                  *object);
+static void     clipboard_manager_watch_cb        (GsdClipboardManager *manager,
+                                                   Window               window,
+                                                   Bool                 is_start,
+                                                   long                 mask,
+                                                   void                *cb_data);
 
-    GSList       *default_cache;
-    gchar        *primary_cache;
+static gulong SELECTION_MAX_SIZE = 0;
 
-    gboolean default_internal_change;
-    gboolean primary_timeout;
-    gboolean primary_internal_change;
-};
+static Atom XA_ATOM_PAIR = None;
+static Atom XA_CLIPBOARD_MANAGER = None;
+static Atom XA_CLIPBOARD = None;
+static Atom XA_DELETE = None;
+static Atom XA_INCR = None;
+static Atom XA_INSERT_PROPERTY = None;
+static Atom XA_INSERT_SELECTION = None;
+static Atom XA_MANAGER = None;
+static Atom XA_MULTIPLE = None;
+static Atom XA_NULL = None;
+static Atom XA_SAVE_TARGETS = None;
+static Atom XA_TARGETS = None;
+static Atom XA_TIMESTAMP = None;
 
 
 
-G_DEFINE_TYPE (XfceClipboardManager, xfce_clipboard_manager, G_TYPE_OBJECT)
+G_DEFINE_TYPE (GsdClipboardManager, gsd_clipboard_manager, G_TYPE_OBJECT)
 
 
 
 static void
-xfce_clipboard_manager_class_init (XfceClipboardManagerClass *klass)
+gsd_clipboard_manager_class_init (GsdClipboardManagerClass *klass)
 {
-}
+        GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
+        object_class->finalize = gsd_clipboard_manager_finalize;
 
+        g_type_class_add_private (klass, sizeof (GsdClipboardManagerPrivate));
+}
 
 static void
-xfce_clipboard_manager_init (XfceClipboardManager *manager)
+gsd_clipboard_manager_init (GsdClipboardManager *manager)
 {
-    manager->default_clipboard =
-      gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
-    manager->primary_clipboard =
-      gtk_clipboard_get (GDK_SELECTION_PRIMARY);
-
-    manager->default_cache = NULL;
-    manager->primary_cache = NULL;
-}
+        manager->priv = G_TYPE_INSTANCE_GET_PRIVATE (manager,
+                                                     GSD_TYPE_CLIPBOARD_MANAGER,
+                                                     GsdClipboardManagerPrivate);
 
+        manager->priv->display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
 
+}
 
 static void
-xfce_clipboard_manager_default_store (XfceClipboardManager *manager)
+gsd_clipboard_manager_finalize (GObject *object)
 {
-    GtkSelectionData *selection_data;
-    GdkAtom          *atoms;
-    gint              n_atoms;
-    gint              i;
-
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
-
-    if (!gtk_clipboard_wait_for_targets (manager->default_clipboard, &atoms, &n_atoms))
-        return;
-
-    if (manager->default_cache != NULL)
-    {
-        g_slist_foreach (manager->default_cache, (GFunc)gtk_selection_data_free, NULL);
-        g_slist_free (manager->default_cache);
-        manager->default_cache = NULL;
-    }
-
-    for (i = 0; i < n_atoms; i++)
-    {
-        if (atoms[i] == gdk_atom_intern_static_string ("TARGETS")
-            || atoms[i] == gdk_atom_intern_static_string ("MULTIPLE")
-            || atoms[i] == gdk_atom_intern_static_string ("DELETE")
-            || atoms[i] == gdk_atom_intern_static_string ("INSERT_PROPERTY")
-            || atoms[i] == gdk_atom_intern_static_string ("INSERT_SELECTION")
-            || atoms[i] == gdk_atom_intern_static_string ("PIXMAP"))
-        {
-            continue;
-        }
+        GsdClipboardManager *clipboard_manager = GSD_CLIPBOARD_MANAGER (object);
 
-        selection_data = gtk_clipboard_wait_for_contents (manager->default_clipboard, atoms[i]);
+        if (clipboard_manager->priv->start_idle_id !=0)
+                g_source_remove (clipboard_manager->priv->start_idle_id);
 
-        if (selection_data == NULL)
-            continue;
-
-        manager->default_cache = g_slist_prepend (manager->default_cache, selection_data);
-    }
+        G_OBJECT_CLASS (gsd_clipboard_manager_parent_class)->finalize (object);
 }
 
-
+/* We need to use reference counting for the target data, since we may
+ * need to keep the data around after loosing the CLIPBOARD ownership
+ * to complete incremental transfers.
+ */
+static TargetData *
+target_data_ref (TargetData *data)
+{
+        data->refcount++;
+        return data;
+}
 
 static void
-xfce_clipboard_manager_default_get_func (GtkClipboard     *clipboard,
-                                         GtkSelectionData *selection_data,
-                                         guint             info,
-                                         gpointer          user_data)
+target_data_unref (TargetData *data)
 {
-    XfceClipboardManager *manager = XFCE_CLIPBOARD_MANAGER (user_data);
-    GSList               *list;
-    GtkSelectionData     *selection_data_cache = NULL;
-
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
-
-    list = manager->default_cache;
-
-    for (; list != NULL && list->next != NULL; list = list->next)
-    {
-        selection_data_cache = list->data;
-
-        if (gtk_selection_data_get_target (selection_data) ==
-            gtk_selection_data_get_target (selection_data_cache))
-            break;
-
-        selection_data_cache = NULL;
-    }
-
-    if (selection_data_cache == NULL)
-        return;
-
-    gtk_selection_data_set (selection_data,
-                            gtk_selection_data_get_target (selection_data_cache),
-                            gtk_selection_data_get_format (selection_data_cache),
-                            gtk_selection_data_get_data (selection_data_cache),
-                            gtk_selection_data_get_length (selection_data_cache));
+        data->refcount--;
+        if (data->refcount == 0) {
+                g_free (data->data);
+                g_slice_free (TargetData, data);
+        }
 }
 
-
-
 static void
-xfce_clipboard_manager_default_clear_func (GtkClipboard *clipboard,
-                                           gpointer      user_data)
+conversion_free (IncrConversion *rdata)
 {
+        if (rdata->data)
+                target_data_unref (rdata->data);
+        g_slice_free (IncrConversion, rdata);
 }
 
-
-
 static void
-xfce_clipboard_manager_default_restore (XfceClipboardManager *manager)
+send_selection_notify (GsdClipboardManager *manager,
+                       Bool                 success)
 {
-    GtkTargetList    *target_list;
-    GtkTargetEntry   *targets;
-    gint              n_targets;
-    GtkSelectionData *sdata;
-    GSList           *list;
+        XSelectionEvent notify;
+
+        notify.type = SelectionNotify;
+        notify.serial = 0;
+        notify.send_event = True;
+        notify.display = manager->priv->display;
+        notify.requestor = manager->priv->requestor;
+        notify.selection = XA_CLIPBOARD_MANAGER;
+        notify.target = XA_SAVE_TARGETS;
+        notify.property = success ? manager->priv->property : None;
+        notify.time = manager->priv->time;
 
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
+        gdk_error_trap_push ();
 
-    list = manager->default_cache;
-    if (list == NULL)
-      return;
+        XSendEvent (manager->priv->display,
+                    manager->priv->requestor,
+                    False,
+                    NoEventMask,
+                    (XEvent *)&notify);
+        XSync (manager->priv->display, False);
 
-    target_list = gtk_target_list_new (NULL, 0);
+        gdk_error_trap_pop ();
+}
 
-    for (; list->next != NULL; list = list->next)
-    {
-        sdata = list->data;
-        gtk_target_list_add (target_list,
-                             gtk_selection_data_get_target (sdata),
-                             0, 0);
-    }
+static void
+finish_selection_request (GsdClipboardManager *manager,
+                          XEvent              *xev,
+                          Bool                 success)
+{
+        XSelectionEvent notify;
+
+        notify.type = SelectionNotify;
+        notify.serial = 0;
+        notify.send_event = True;
+        notify.display = xev->xselectionrequest.display;
+        notify.requestor = xev->xselectionrequest.requestor;
+        notify.selection = xev->xselectionrequest.selection;
+        notify.target = xev->xselectionrequest.target;
+        notify.property = success ? xev->xselectionrequest.property : None;
+        notify.time = xev->xselectionrequest.time;
 
-    targets = gtk_target_table_new_from_list (target_list, &n_targets);
+        gdk_error_trap_push ();
 
-    gtk_target_list_unref (target_list);
+        XSendEvent (xev->xselectionrequest.display,
+                    xev->xselectionrequest.requestor,
+                    False, NoEventMask, (XEvent *) &notify);
+        XSync (manager->priv->display, False);
 
-    gtk_clipboard_set_with_data (manager->default_clipboard,
-                                 targets, n_targets,
-                                 xfce_clipboard_manager_default_get_func,
-                                 xfce_clipboard_manager_default_clear_func,
-                                 manager);
+        gdk_error_trap_pop ();
 }
 
+static int
+clipboard_bytes_per_item (int format)
+{
+        switch (format) {
+        case 8: return sizeof (char);
+        case 16: return sizeof (short);
+        case 32: return sizeof (long);
+        default: ;
+        }
 
+        return 0;
+}
 
 static void
-xfce_clipboard_manager_default_owner_change (XfceClipboardManager *manager,
-                                             GdkEventOwnerChange  *event)
+save_targets (GsdClipboardManager *manager,
+              Atom                *targets,
+              int                  nitems)
 {
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
+        gint        nout, i;
+        Atom       *multiple;
+        TargetData *tdata;
+
+        multiple = g_new (Atom, 2 * nitems);
+
+        nout = 0;
+        for (i = 0; i < nitems; i++) {
+                if (targets[i] != XA_TARGETS &&
+                    targets[i] != XA_MULTIPLE &&
+                    targets[i] != XA_DELETE &&
+                    targets[i] != XA_INSERT_PROPERTY &&
+                    targets[i] != XA_INSERT_SELECTION &&
+                    targets[i] != XA_PIXMAP) {
+                        tdata = g_slice_new (TargetData);
+                        tdata->data = NULL;
+                        tdata->length = 0;
+                        tdata->target = targets[i];
+                        tdata->type = None;
+                        tdata->format = 0;
+                        tdata->refcount = 1;
+                        manager->priv->contents = g_slist_prepend (manager->priv->contents, tdata);
+
+                        multiple[nout++] = targets[i];
+                        multiple[nout++] = targets[i];
+                }
+        }
 
-    if (event->send_event == TRUE)
-      return;
+        XFree (targets);
 
-    if (event->owner != 0)
-    {
-        if (manager->default_internal_change)
-        {
-            manager->default_internal_change = FALSE;
-            return;
-        }
+        XChangeProperty (manager->priv->display, manager->priv->window,
+                         XA_MULTIPLE, XA_ATOM_PAIR,
+                         32, PropModeReplace, (const guchar *) multiple, nout);
+        g_free (multiple);
 
-        xfce_clipboard_manager_default_store (manager);
-    }
-    else
-    {
-        /* This 'bug' happens with Mozilla applications, it means that
-         * we restored the clipboard (we own it now) but somehow we are
-         * being noticed twice about that fact where first the owner is
-         * 0 (which is when we must restore) but then again where the
-         * owner is ourself (which is what normally only happens and
-         * also that means that we have to store the clipboard content
-         * e.g. owner is not 0). By the second time we would store
-         * ourself back with an empty clipboard... solution is to jump
-         * over the first time and don't try to restore empty data. */
-        if (manager->default_internal_change)
-            return;
-
-        manager->default_internal_change = TRUE;
-        xfce_clipboard_manager_default_restore (manager);
-    }
+        XConvertSelection (manager->priv->display, XA_CLIPBOARD,
+                           XA_MULTIPLE, XA_MULTIPLE,
+                           manager->priv->window, manager->priv->time);
 }
 
+static int
+find_content_target (TargetData *tdata,
+                     Atom       *target)
+{
+        return !(tdata->target == *target);
+}
 
-
-static gboolean
-xfce_clipboard_manager_primary_clipboard_store (XfceClipboardManager *manager)
+static int
+find_content_type (TargetData *tdata,
+                   Atom        *type)
 {
-    GdkModifierType state;
-    gchar *text;
+        return !(tdata->type == *type);
+}
 
-    gdk_window_get_pointer (NULL, NULL, NULL, &state);
+static int
+find_conversion_requestor (IncrConversion *rdata,
+                           XEvent         *xev)
+{
+        return !(rdata->requestor == xev->xproperty.window
+                 && rdata->property == xev->xproperty.atom);
+}
 
-    if (state & (GDK_BUTTON1_MASK|GDK_SHIFT_MASK))
-        return TRUE;
+static void
+get_property (TargetData          *tdata,
+              GsdClipboardManager *manager)
+{
+        Atom    type;
+        gint    format;
+        gulong  length;
+        gulong  remaining;
+        guchar *data;
+
+        XGetWindowProperty (manager->priv->display,
+                            manager->priv->window,
+                            tdata->target,
+                            0,
+                            0x1FFFFFFF,
+                            True,
+                            AnyPropertyType,
+                            &type,
+                            &format,
+                            &length,
+                            &remaining,
+                            &data);
+
+        if (type == None) {
+                manager->priv->contents = g_slist_remove (manager->priv->contents, tdata);
+                g_slice_free (TargetData, tdata);
+        } else if (type == XA_INCR) {
+                tdata->type = type;
+                tdata->length = 0;
+                XFree (data);
+        } else {
+                tdata->type = type;
+                tdata->data = data;
+                tdata->length = length * clipboard_bytes_per_item (format);
+                tdata->format = format;
+        }
+}
 
-    text = gtk_clipboard_wait_for_text (manager->primary_clipboard);
+static Bool
+receive_incrementally (GsdClipboardManager *manager,
+                       XEvent              *xev)
+{
+        GSList     *list;
+        TargetData *tdata;
+        Atom        type;
+        gint        format;
+        gulong      length, nitems, remaining;
+        guchar     *data;
+
+        if (xev->xproperty.window != manager->priv->window)
+                return False;
+
+        list = g_slist_find_custom (manager->priv->contents,
+                                    &xev->xproperty.atom,
+                                    (GCompareFunc) find_content_target);
+
+        if (!list)
+                return False;
+
+        tdata = (TargetData *) list->data;
+
+        if (tdata->type != XA_INCR)
+                return False;
+
+        XGetWindowProperty (xev->xproperty.display,
+                            xev->xproperty.window,
+                            xev->xproperty.atom,
+                            0, 0x1FFFFFFF, True, AnyPropertyType,
+                            &type, &format, &nitems, &remaining, &data);
+
+        length = nitems * clipboard_bytes_per_item (format);
+        if (length == 0) {
+                tdata->type = type;
+                tdata->format = format;
+
+                if (!g_slist_find_custom (manager->priv->contents,
+                                          &XA_INCR, (GCompareFunc) find_content_type)) {
+
+                        /* all incremental transfers done */
+                        send_selection_notify (manager, True);
+                        manager->priv->requestor = None;
+                }
+
+                XFree (data);
+        } else {
+                if (!tdata->data) {
+                        tdata->data = data;
+                        tdata->length = length;
+                } else {
+                        tdata->data = realloc (tdata->data, tdata->length + length + 1);
+                        memcpy (tdata->data + tdata->length, data, length + 1);
+                        tdata->length += length;
+                        XFree (data);
+                }
+        }
 
-    if (text != NULL)
-    {
-        g_free (manager->primary_cache);
-        manager->primary_cache = text;
-    }
+        return True;
+}
 
-    manager->primary_timeout = 0;
+static Bool
+send_incrementally (GsdClipboardManager *manager,
+                    XEvent              *xev)
+{
+        GSList         *list;
+        IncrConversion *rdata;
+        gulong          length;
+        gulong          items;
+        guchar         *data;
+
+        list = g_slist_find_custom (manager->priv->conversions, xev,
+                                    (GCompareFunc) find_conversion_requestor);
+        if (list == NULL)
+                return False;
+
+        rdata = (IncrConversion *) list->data;
+
+        data = rdata->data->data + rdata->offset;
+        length = rdata->data->length - rdata->offset;
+        if (length > SELECTION_MAX_SIZE)
+                length = SELECTION_MAX_SIZE;
+
+        rdata->offset += length;
+
+        items = length / clipboard_bytes_per_item (rdata->data->format);
+        XChangeProperty (manager->priv->display, rdata->requestor,
+                         rdata->property, rdata->data->type,
+                         rdata->data->format, PropModeAppend,
+                         data, items);
+
+        if (length == 0) {
+                manager->priv->conversions = g_slist_remove (manager->priv->conversions, rdata);
+                conversion_free (rdata);
+        }
 
-    return FALSE;
+        return True;
 }
 
+static void
+convert_clipboard_manager (GsdClipboardManager *manager,
+                           XEvent              *xev)
+{
+        Atom    type = None;
+        gint    format;
+        gulong  nitems;
+        gulong  remaining;
+        Atom   *targets = NULL;
+        Atom    targets2[3];
+        gint    n_targets;
+
+        if (xev->xselectionrequest.target == XA_SAVE_TARGETS) {
+                if (manager->priv->requestor != None || manager->priv->contents != NULL) {
+                        /* We're in the middle of a conversion request, or own
+                         * the CLIPBOARD already
+                         */
+                        finish_selection_request (manager, xev, False);
+                } else {
+                        gdk_error_trap_push ();
+
+                        clipboard_manager_watch_cb (manager,
+                                                    xev->xselectionrequest.requestor,
+                                                    True,
+                                                    StructureNotifyMask,
+                                                    NULL);
+                        XSelectInput (manager->priv->display,
+                                      xev->xselectionrequest.requestor,
+                                      StructureNotifyMask);
+                        XSync (manager->priv->display, False);
+
+                        if (gdk_error_trap_pop () != Success)
+                                return;
+
+                        gdk_error_trap_push ();
+
+                        if (xev->xselectionrequest.property != None) {
+                                XGetWindowProperty (manager->priv->display,
+                                                    xev->xselectionrequest.requestor,
+                                                    xev->xselectionrequest.property,
+                                                    0, 0x1FFFFFFF, False, XA_ATOM,
+                                                    &type, &format, &nitems, &remaining,
+                                                    (guchar **) &targets);
+
+                                if (gdk_error_trap_pop () != Success) {
+                                        if (targets)
+                                                XFree (targets);
+
+                                        return;
+                                }
+                        }
+
+                        manager->priv->requestor = xev->xselectionrequest.requestor;
+                        manager->priv->property = xev->xselectionrequest.property;
+                        manager->priv->time = xev->xselectionrequest.time;
+
+                        if (type == None)
+                                XConvertSelection (manager->priv->display, XA_CLIPBOARD,
+                                                   XA_TARGETS, XA_TARGETS,
+                                                   manager->priv->window, manager->priv->time);
+                        else
+                                save_targets (manager, targets, nitems);
+                }
+        } else if (xev->xselectionrequest.target == XA_TIMESTAMP) {
+                XChangeProperty (manager->priv->display,
+                                 xev->xselectionrequest.requestor,
+                                 xev->xselectionrequest.property,
+                                 XA_INTEGER, 32, PropModeReplace,
+                                 (guchar *) &manager->priv->timestamp, 1);
+
+                finish_selection_request (manager, xev, True);
+        } else if (xev->xselectionrequest.target == XA_TARGETS) {
+                n_targets = 0;
+                targets2[n_targets++] = XA_TARGETS;
+                targets2[n_targets++] = XA_TIMESTAMP;
+                targets2[n_targets++] = XA_SAVE_TARGETS;
+
+                XChangeProperty (manager->priv->display,
+                                 xev->xselectionrequest.requestor,
+                                 xev->xselectionrequest.property,
+                                 XA_ATOM, 32, PropModeReplace,
+                                 (guchar *) targets2, n_targets);
+
+                finish_selection_request (manager, xev, True);
+        } else
+                finish_selection_request (manager, xev, False);
+}
 
-static gboolean
-xfce_clipboard_manager_primary_clipboard_restore (XfceClipboardManager *manager)
+static void
+convert_clipboard_target (IncrConversion      *rdata,
+                          GsdClipboardManager *manager)
 {
-    if (manager->primary_cache != NULL)
-    {
-        gtk_clipboard_set_text (manager->primary_clipboard,
-                                manager->primary_cache,
-                                -1);
-        manager->primary_internal_change = TRUE;
-    }
-
-    return FALSE;
+        TargetData        *tdata;
+        Atom              *targets;
+        gint               n_targets;
+        GSList            *list;
+        gulong             items;
+        XWindowAttributes  atts;
+
+        if (rdata->target == XA_TARGETS) {
+                n_targets = g_slist_length (manager->priv->contents) + 2;
+                targets = g_new (Atom, n_targets);
+
+                n_targets = 0;
+                targets[n_targets++] = XA_TARGETS;
+                targets[n_targets++] = XA_MULTIPLE;
+
+                for (list = manager->priv->contents; list; list = list->next) {
+                        tdata = (TargetData *) list->data;
+                        targets[n_targets++] = tdata->target;
+                }
+
+                XChangeProperty (manager->priv->display, rdata->requestor,
+                                 rdata->property,
+                                 XA_ATOM, 32, PropModeReplace,
+                                 (guchar *) targets, n_targets);
+                g_free (targets);
+        } else  {
+                /* Convert from stored CLIPBOARD data */
+                list = g_slist_find_custom (manager->priv->contents,
+                                            &rdata->target,
+                                            (GCompareFunc) find_content_target);
+
+                /* We got a target that we don't support */
+                if (!list)
+                        return;
+
+                tdata = (TargetData *)list->data;
+                if (tdata->type == XA_INCR) {
+                        /* we haven't completely received this target yet  */
+                        rdata->property = None;
+                        return;
+                }
+
+                rdata->data = target_data_ref (tdata);
+                items = tdata->length / clipboard_bytes_per_item (tdata->format);
+                if (tdata->length <= SELECTION_MAX_SIZE)
+                        XChangeProperty (manager->priv->display, rdata->requestor,
+                                         rdata->property,
+                                         tdata->type, tdata->format, PropModeReplace,
+                                         tdata->data, items);
+                else {
+                        /* start incremental transfer */
+                        rdata->offset = 0;
+
+                        gdk_error_trap_push ();
+
+                        XGetWindowAttributes (manager->priv->display, rdata->requestor, &atts);
+                        XSelectInput (manager->priv->display, rdata->requestor,
+                                      atts.your_event_mask | PropertyChangeMask);
+
+                        XChangeProperty (manager->priv->display, rdata->requestor,
+                                         rdata->property,
+                                         XA_INCR, 32, PropModeReplace,
+                                         (guchar *) &items, 1);
+
+                        XSync (manager->priv->display, False);
+
+                        gdk_error_trap_pop ();
+                }
+        }
 }
 
+static void
+collect_incremental (IncrConversion      *rdata,
+                     GsdClipboardManager *manager)
+{
+        if (rdata->offset >= 0)
+                manager->priv->conversions = g_slist_prepend (manager->priv->conversions, rdata);
+        else
+                conversion_free (rdata);
+}
 
 static void
-xfce_clipboard_manager_primary_owner_change (XfceClipboardManager *manager,
-                                             GdkEventOwnerChange *event)
+convert_clipboard (GsdClipboardManager *manager,
+                   XEvent              *xev)
 {
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
-
-    if (event->send_event == TRUE)
-        return;
-
-    if (manager->primary_timeout != 0)
-    {
-        g_source_remove (manager->primary_timeout);
-        manager->primary_timeout = 0;
-    }
-
-    if (event->owner != 0)
-    {
-        if (manager->primary_internal_change == TRUE)
-        {
-            manager->primary_internal_change = FALSE;
-            return;
+        GSList         *list;
+        GSList         *conversions = NULL;
+        IncrConversion *rdata;
+        Atom            type = None;
+        gint            format;
+        gulong          i, nitems;
+        gulong          remaining;
+        Atom           *multiple;
+
+        if (xev->xselectionrequest.target == XA_MULTIPLE) {
+                XGetWindowProperty (xev->xselectionrequest.display,
+                                    xev->xselectionrequest.requestor,
+                                    xev->xselectionrequest.property,
+                                    0, 0x1FFFFFFF, False, XA_ATOM_PAIR,
+                                    &type, &format, &nitems, &remaining,
+                                    (guchar **) &multiple);
+
+                if (type != XA_ATOM_PAIR || nitems == 0) {
+                        if (multiple)
+                                g_free (multiple);
+                        return;
+                }
+
+                for (i = 0; i < nitems; i += 2) {
+                        rdata = (IncrConversion *) malloc (sizeof (IncrConversion));
+                        rdata->requestor = xev->xselectionrequest.requestor;
+                        rdata->target = multiple[i];
+                        rdata->property = multiple[i+1];
+                        rdata->data = NULL;
+                        rdata->offset = -1;
+                        conversions = g_slist_prepend (conversions, rdata);
+                }
+        } else {
+                multiple = NULL;
+
+                rdata = g_slice_new (IncrConversion);
+                rdata->requestor = xev->xselectionrequest.requestor;
+                rdata->target = xev->xselectionrequest.target;
+                rdata->property = xev->xselectionrequest.property;
+                rdata->data = NULL;
+                rdata->offset = -1;
+                conversions = g_slist_prepend (conversions, rdata);
         }
 
-        manager->primary_timeout = g_timeout_add (250, (GSourceFunc)xfce_clipboard_manager_primary_clipboard_store, manager);
-    }
-    else if (gtk_clipboard_wait_is_text_available (manager->primary_clipboard) == FALSE)
-    {
-        manager->primary_timeout = g_timeout_add (250, (GSourceFunc)xfce_clipboard_manager_primary_clipboard_restore, manager);
-    }
-}
+        g_slist_foreach (conversions, (GFunc) convert_clipboard_target, manager);
+
+        if (conversions->next == NULL &&
+            ((IncrConversion *) conversions->data)->property == None) {
+                finish_selection_request (manager, xev, False);
+        } else {
+                if (multiple) {
+                        i = 0;
+                        for (list = conversions; list; list = list->next) {
+                                rdata = (IncrConversion *)list->data;
+                                multiple[i++] = rdata->target;
+                                multiple[i++] = rdata->property;
+                        }
+                        XChangeProperty (xev->xselectionrequest.display,
+                                         xev->xselectionrequest.requestor,
+                                         xev->xselectionrequest.property,
+                                         XA_ATOM_PAIR, 32, PropModeReplace,
+                                         (guchar *) multiple, nitems);
+                }
+                finish_selection_request (manager, xev, True);
+        }
 
+        g_slist_foreach (conversions, (GFunc) collect_incremental, manager);
+        g_slist_free (conversions);
 
+        g_free (multiple);
+}
 
-static gboolean
-xfce_clipboard_manager_selection_owner (const gchar   *selection_name,
-                                        gboolean       force,
-                                        GdkFilterFunc  filter_func)
+static Bool
+clipboard_manager_process_event (GsdClipboardManager *manager,
+                                 XEvent              *xev)
 {
-#ifdef GDK_WINDOWING_X11
-    GdkDisplay *gdpy = gdk_display_get_default ();
-    GtkWidget *invisible;
-    Display *dpy = GDK_DISPLAY_XDISPLAY (gdpy);
-    GdkWindow *rootwin = gdk_screen_get_root_window (gdk_display_get_screen (gdpy, 0));
-    GdkWindow *invisible_window;
-    Window xroot = GDK_WINDOW_XID (rootwin);
-    GdkAtom selection_atom;
-    Atom selection_atom_x11;
-    XClientMessageEvent xev;
-    gboolean has_owner;
-
-    g_return_val_if_fail (selection_name != NULL, FALSE);
-
-    selection_atom = gdk_atom_intern (selection_name, FALSE);
-    selection_atom_x11 = gdk_x11_atom_to_xatom_for_display (gdpy, selection_atom);
-
-    /* can't use gdk for the selection owner here because it returns NULL
-     * if the selection owner is in another process */
-    if (!force)
-    {
-        gdk_error_trap_push ();
-        has_owner = XGetSelectionOwner (dpy, selection_atom_x11) != None;
-        gdk_flush ();
-        gdk_error_trap_pop ();
-        if (has_owner)
-            return FALSE;
-    }
-
-    invisible = gtk_invisible_new ();
-    gtk_widget_realize (invisible);
-    gtk_widget_add_events (invisible, GDK_STRUCTURE_MASK | GDK_PROPERTY_CHANGE_MASK);
-
-    invisible_window = gtk_widget_get_window (invisible);
-
-    if (!gdk_selection_owner_set_for_display (gdpy, invisible_window,
-                                              selection_atom, GDK_CURRENT_TIME,
-                                              TRUE))
-    {
-        g_critical ("Unable to get selection %s", selection_name);
-        gtk_widget_destroy (invisible);
-        return FALSE;
-    }
-
-    /* but we can use gdk here since we only care if it's our window */
-    if (gdk_selection_owner_get_for_display (gdpy, selection_atom) != invisible_window)
-    {
-        gtk_widget_destroy (invisible);
-        return FALSE;
-    }
-
-    xev.type = ClientMessage;
-    xev.window = xroot;
-    xev.message_type = gdk_x11_get_xatom_by_name_for_display (gdpy, "MANAGER");
-    xev.format = 32;
-    xev.data.l[0] = CurrentTime;
-    xev.data.l[1] = selection_atom_x11;
-    xev.data.l[2] = GDK_WINDOW_XID (invisible_window);
-    xev.data.l[3] = xev.data.l[4] = 0;
-
-    gdk_error_trap_push ();
-    XSendEvent (dpy, xroot, False, StructureNotifyMask, (XEvent *)&xev);
-    gdk_flush ();
-    if (gdk_error_trap_pop ())
-      g_critical ("Failed to send client event");
-
-    if (filter_func != NULL)
-        gdk_window_add_filter (invisible_window, filter_func, invisible);
-#endif
-
-    return TRUE;
-}
+        Atom    type;
+        gint    format;
+        gulong  nitems;
+        gulong  remaining;
+        Atom   *targets = NULL;
+        GSList *tmp;
+
+        switch (xev->xany.type) {
+        case DestroyNotify:
+                if (xev->xdestroywindow.window == manager->priv->requestor) {
+                        g_slist_foreach (manager->priv->contents, (GFunc) target_data_unref, NULL);
+                        g_slist_free (manager->priv->contents);
+                        manager->priv->contents = NULL;
+
+                        clipboard_manager_watch_cb (manager,
+                                                    manager->priv->requestor,
+                                                    False,
+                                                    0,
+                                                    NULL);
+                        manager->priv->requestor = None;
+                }
+                break;
+
+        case PropertyNotify:
+                if (xev->xproperty.state == PropertyNewValue) {
+                        return receive_incrementally (manager, xev);
+                } else {
+                        return send_incrementally (manager, xev);
+                }
+                break;
+
+        case SelectionClear:
+                if (xev->xany.window != manager->priv->window)
+                        return False;
+
+                if (xev->xselectionclear.selection == XA_CLIPBOARD_MANAGER) {
+                        /* We lost the manager selection */
+                        if (manager->priv->contents) {
+                                g_slist_foreach (manager->priv->contents, (GFunc) target_data_unref, NULL);
+                                g_slist_free (manager->priv->contents);
+                                manager->priv->contents = NULL;
+
+                                XSetSelectionOwner (manager->priv->display,
+                                                    XA_CLIPBOARD,
+                                                    None, manager->priv->time);
+                        }
+
+                        return True;
+                }
+                if (xev->xselectionclear.selection == XA_CLIPBOARD) {
+                        /* We lost the clipboard selection */
+                        g_slist_foreach (manager->priv->contents, (GFunc) target_data_unref, NULL);
+                        g_slist_free (manager->priv->contents);
+                        manager->priv->contents = NULL;
+                        clipboard_manager_watch_cb (manager,
+                                                    manager->priv->requestor,
+                                                    False,
+                                                    0,
+                                                    NULL);
+                        manager->priv->requestor = None;
+
+                        return True;
+                }
+                break;
+
+        case SelectionNotify:
+                if (xev->xany.window != manager->priv->window)
+                        return False;
+
+                if (xev->xselection.selection == XA_CLIPBOARD) {
+                        /* a CLIPBOARD conversion is done */
+                        if (xev->xselection.property == XA_TARGETS) {
+                                XGetWindowProperty (xev->xselection.display,
+                                                    xev->xselection.requestor,
+                                                    xev->xselection.property,
+                                                    0, 0x1FFFFFFF, True, XA_ATOM,
+                                                    &type, &format, &nitems, &remaining,
+                                                    (guchar **) &targets);
+
+                                save_targets (manager, targets, nitems);
+                        } else if (xev->xselection.property == XA_MULTIPLE) {
+                                tmp = g_slist_copy (manager->priv->contents);
+                                g_slist_foreach (tmp, (GFunc) get_property, manager);
+                                g_slist_free (tmp);
+
+                                manager->priv->time = xev->xselection.time;
+                                XSetSelectionOwner (manager->priv->display, XA_CLIPBOARD,
+                                                    manager->priv->window, manager->priv->time);
+
+                                if (manager->priv->property != None)
+                                        XChangeProperty (manager->priv->display,
+                                                         manager->priv->requestor,
+                                                         manager->priv->property,
+                                                         XA_ATOM, 32, PropModeReplace,
+                                                         (guchar *)&XA_NULL, 1);
+
+                                if (!g_slist_find_custom (manager->priv->contents,
+                                                          &XA_INCR, (GCompareFunc) find_content_type)) {
+                                        /* all transfers done */
+                                        send_selection_notify (manager, True);
+                                        clipboard_manager_watch_cb (manager,
+                                                                    manager->priv->requestor,
+                                                                    False,
+                                                                    0,
+                                                                    NULL);
+                                        manager->priv->requestor = None;
+                                }
+                        }
+                        else if (xev->xselection.property == None) {
+                                send_selection_notify (manager, False);
+                                clipboard_manager_watch_cb (manager,
+                                                            manager->priv->requestor,
+                                                            False,
+                                                            0,
+                                                            NULL);
+                                manager->priv->requestor = None;
+                        }
+
+                        return True;
+                }
+                break;
+
+        case SelectionRequest:
+                if (xev->xany.window != manager->priv->window) {
+                        return False;
+                }
+
+                if (xev->xselectionrequest.selection == XA_CLIPBOARD_MANAGER) {
+                        convert_clipboard_manager (manager, xev);
+                        return True;
+                } else if (xev->xselectionrequest.selection == XA_CLIPBOARD) {
+                        convert_clipboard (manager, xev);
+                        return True;
+                }
+                break;
+
+        default:;
+        }
 
+        return False;
+}
 
+static GdkFilterReturn
+clipboard_manager_event_filter (GdkXEvent           *xevent,
+                                GdkEvent            *event,
+                                GsdClipboardManager *manager)
+{
+        if (clipboard_manager_process_event (manager, (XEvent *)xevent)) {
+                return GDK_FILTER_REMOVE;
+        } else {
+                return GDK_FILTER_CONTINUE;
+        }
+}
 
-XfceClipboardManager *
-xfce_clipboard_manager_new (void)
+static void
+clipboard_manager_watch_cb (GsdClipboardManager *manager,
+                            Window               window,
+                            Bool                 is_start,
+                            long                 mask,
+                            void                *cb_data)
 {
-   return g_object_new (XFCE_TYPE_CLIPBOARD_MANAGER, NULL);
+        GdkWindow  *gdkwin;
+        GdkDisplay *display;
+
+        display = gdk_display_get_default ();
+        gdkwin = gdk_x11_window_lookup_for_display (display, window);
+
+        if (is_start) {
+                if (gdkwin == NULL) {
+                        gdkwin = gdk_x11_window_foreign_new_for_display (display, window);
+                } else {
+                        g_object_ref (gdkwin);
+                }
+
+                gdk_window_add_filter (gdkwin,
+                                       (GdkFilterFunc) clipboard_manager_event_filter,
+                                       manager);
+        } else {
+                if (gdkwin == NULL) {
+                        return;
+                }
+                gdk_window_remove_filter (gdkwin,
+                                          (GdkFilterFunc) clipboard_manager_event_filter,
+                                          manager);
+                g_object_unref (gdkwin);
+        }
 }
 
+static void
+init_atoms (Display *display)
+{
+    gulong max_request_size;
+
+    if (SELECTION_MAX_SIZE > 0)
+      return;
 
+    XA_ATOM_PAIR = XInternAtom (display, "ATOM_PAIR", False);
+    XA_CLIPBOARD_MANAGER = XInternAtom (display, "CLIPBOARD_MANAGER", False);
+    XA_CLIPBOARD = XInternAtom (display, "CLIPBOARD", False);
+    XA_DELETE = XInternAtom (display, "DELETE", False);
+    XA_INCR = XInternAtom (display, "INCR", False);
+    XA_INSERT_PROPERTY = XInternAtom (display, "INSERT_PROPERTY", False);
+    XA_INSERT_SELECTION = XInternAtom (display, "INSERT_SELECTION", False);
+    XA_MANAGER = XInternAtom (display, "MANAGER", False);
+    XA_MULTIPLE = XInternAtom (display, "MULTIPLE", False);
+    XA_NULL = XInternAtom (display, "NULL", False);
+    XA_SAVE_TARGETS = XInternAtom (display, "SAVE_TARGETS", False);
+    XA_TARGETS = XInternAtom (display, "TARGETS", False);
+    XA_TIMESTAMP = XInternAtom (display, "TIMESTAMP", False);
+
+    max_request_size = XExtendedMaxRequestSize (display);
+    if (max_request_size == 0)
+      max_request_size = XMaxRequestSize (display);
+
+    SELECTION_MAX_SIZE = max_request_size - 100;
+    if (SELECTION_MAX_SIZE > 262144)
+      SELECTION_MAX_SIZE =  262144;
+}
 
 gboolean
-xfce_clipboard_manager_start (XfceClipboardManager *manager)
+gsd_clipboard_manager_start (GsdClipboardManager *manager,
+                             gboolean             replace)
 {
-    g_return_val_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager), FALSE);
-
-    /* Check if there is a clipboard manager running */
-    if (gdk_display_supports_clipboard_persistence (gdk_display_get_default ()))
-    {
-        g_message ("A clipboard manager is already running.");
-        return FALSE;
-    }
-
-    if (!xfce_clipboard_manager_selection_owner ("CLIPBOARD_MANAGER", FALSE, NULL))
-    {
-        g_warning ("Unable to get the clipboard manager selection.");
-        return FALSE;
-    }
-
-    g_signal_connect_swapped (manager->default_clipboard, "owner-change",
-                              G_CALLBACK (xfce_clipboard_manager_default_owner_change),
-                              manager);
-    g_signal_connect_swapped (manager->primary_clipboard, "owner-change",
-                              G_CALLBACK (xfce_clipboard_manager_primary_owner_change),
-                              manager);
-
-    return TRUE;
-}
+        XClientMessageEvent xev;
 
+        init_atoms (manager->priv->display);
 
+        /* check if there is a clipboard manager running */
+        if (!replace
+            && XGetSelectionOwner (manager->priv->display, XA_CLIPBOARD_MANAGER)) {
+                return FALSE;
+        }
+
+        manager->priv->contents = NULL;
+        manager->priv->conversions = NULL;
+        manager->priv->requestor = None;
+
+        manager->priv->window = XCreateSimpleWindow (manager->priv->display,
+                                                     DefaultRootWindow (manager->priv->display),
+                                                     0, 0, 10, 10, 0,
+                                                     WhitePixel (manager->priv->display,
+                                                                 DefaultScreen (manager->priv->display)),
+                                                     WhitePixel (manager->priv->display,
+                                                                 DefaultScreen (manager->priv->display)));
+        clipboard_manager_watch_cb (manager,
+                                    manager->priv->window,
+                                    True,
+                                    PropertyChangeMask,
+                                    NULL);
+        XSelectInput (manager->priv->display,
+                      manager->priv->window,
+                      PropertyChangeMask);
+        manager->priv->timestamp = xfce_xsettings_get_server_time (manager->priv->display, manager->priv->window);
+
+        XSetSelectionOwner (manager->priv->display,
+                            XA_CLIPBOARD_MANAGER,
+                            manager->priv->window,
+                            manager->priv->timestamp);
+
+        /* Check to see if we managed to claim the selection. If not,
+         * we treat it as if we got it then immediately lost it
+         */
+        if (XGetSelectionOwner (manager->priv->display, XA_CLIPBOARD_MANAGER) == manager->priv->window) {
+                xev.type = ClientMessage;
+                xev.window = DefaultRootWindow (manager->priv->display);
+                xev.message_type = XA_MANAGER;
+                xev.format = 32;
+                xev.data.l[0] = manager->priv->timestamp;
+                xev.data.l[1] = XA_CLIPBOARD_MANAGER;
+                xev.data.l[2] = manager->priv->window;
+                xev.data.l[3] = 0;      /* manager specific data */
+                xev.data.l[4] = 0;      /* manager specific data */
+
+                XSendEvent (manager->priv->display,
+                            DefaultRootWindow (manager->priv->display),
+                            False,
+                            StructureNotifyMask,
+                            (XEvent *)&xev);
+        } else {
+                clipboard_manager_watch_cb (manager,
+                                            manager->priv->window,
+                                            False,
+                                            0,
+                                            NULL);
+        }
+
+        manager->priv->start_idle_id = 0;
+
+        return TRUE;
+}
 
 void
-xfce_clipboard_manager_stop (XfceClipboardManager *manager)
+gsd_clipboard_manager_stop (GsdClipboardManager *manager)
 {
-    g_return_if_fail (XFCE_IS_CLIPBOARD_MANAGER (manager));
-
-    g_signal_handlers_disconnect_by_func (manager->default_clipboard,
-                                          xfce_clipboard_manager_default_owner_change,
-                                          manager);
-    g_signal_handlers_disconnect_by_func (manager->primary_clipboard,
-                                          xfce_clipboard_manager_primary_owner_change,
-                                          manager);
+        if (manager->priv->window != None) {
+                clipboard_manager_watch_cb (manager,
+                                            manager->priv->window,
+                                            False,
+                                            0,
+                                            NULL);
+                XDestroyWindow (manager->priv->display, manager->priv->window);
+                manager->priv->window = None;
+        }
 
-    if (manager->default_cache != NULL)
-    {
-        g_slist_foreach (manager->default_cache, (GFunc)gtk_selection_data_free, NULL);
-        g_slist_free (manager->default_cache);
-        manager->default_cache = NULL;
-    }
+        if (manager->priv->conversions != NULL) {
+                g_slist_foreach (manager->priv->conversions, (GFunc) conversion_free, NULL);
+                g_slist_free (manager->priv->conversions);
+                manager->priv->conversions = NULL;
+        }
 
-    if (manager->primary_cache != NULL)
-        g_free (manager->primary_cache);
+        if (manager->priv->contents != NULL) {
+                g_slist_foreach (manager->priv->contents, (GFunc) target_data_unref, NULL);
+                g_slist_free (manager->priv->contents);
+                manager->priv->contents = NULL;
+        }
 }
diff --git a/xfsettingsd/clipboard-manager.h b/xfsettingsd/clipboard-manager.h
index 86c9bf2..5b74895 100644
--- a/xfsettingsd/clipboard-manager.h
+++ b/xfsettingsd/clipboard-manager.h
@@ -18,29 +18,42 @@
  *
  */
 
-#ifndef __XFCE_CLIPBOARD_MANAGER_H
-#define __XFCE_CLIPBOARD_MANAGER_H
+#ifndef __GSD_CLIPBOARD_MANAGER_H
+#define __GSD_CLIPBOARD_MANAGER_H
 
 #include <glib-object.h>
 
 G_BEGIN_DECLS
 
-typedef struct _XfceClipboardManager      XfceClipboardManager;
-typedef struct _XfceClipboardManagerClass XfceClipboardManagerClass;
+typedef struct _GsdClipboardManager        GsdClipboardManager;
+typedef struct _GsdClipboardManagerClass   GsdClipboardManagerClass;
+typedef struct _GsdClipboardManagerPrivate GsdClipboardManagerPrivate;
 
-#define XFCE_TYPE_CLIPBOARD_MANAGER         (xfce_clipboard_manager_get_type ())
-#define XFCE_CLIPBOARD_MANAGER(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), XFCE_TYPE_CLIPBOARD_MANAGER, XfceClipboardManager))
-#define XFCE_CLIPBOARD_MANAGER_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), XFCE_TYPE_CLIPBOARD_MANAGER, XfceClipboardManagerClass))
-#define XFCE_IS_CLIPBOARD_MANAGER(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), XFCE_TYPE_CLIPBOARD_MANAGER))
-#define XFCE_IS_CLIPBOARD_MANAGER_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), XFCE_TYPE_CLIPBOARD_MANAGER))
-#define XFCE_CLIPBOARD_MANAGER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), XFCE_TYPE_CLIPBOARD_MANAGER, XfceClipboardManagerClass))
+#define GSD_TYPE_CLIPBOARD_MANAGER         (gsd_clipboard_manager_get_type ())
+#define GSD_CLIPBOARD_MANAGER(o)           (G_TYPE_CHECK_INSTANCE_CAST ((o), GSD_TYPE_CLIPBOARD_MANAGER, GsdClipboardManager))
+#define GSD_CLIPBOARD_MANAGER_CLASS(k)     (G_TYPE_CHECK_CLASS_CAST((k), GSD_TYPE_CLIPBOARD_MANAGER, GsdClipboardManagerClass))
+#define GSD_IS_CLIPBOARD_MANAGER(o)        (G_TYPE_CHECK_INSTANCE_TYPE ((o), GSD_TYPE_CLIPBOARD_MANAGER))
+#define GSD_IS_CLIPBOARD_MANAGER_CLASS(k)  (G_TYPE_CHECK_CLASS_TYPE ((k), GSD_TYPE_CLIPBOARD_MANAGER))
+#define GSD_CLIPBOARD_MANAGER_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), GSD_TYPE_CLIPBOARD_MANAGER, GsdClipboardManagerClass))
 
-GType                 xfce_clipboard_manager_get_type            (void);
+struct _GsdClipboardManager
+{
+    GObject                     parent;
+    GsdClipboardManagerPrivate *priv;
+};
 
-XfceClipboardManager *xfce_clipboard_manager_new                 (void);
-gboolean              xfce_clipboard_manager_start               (XfceClipboardManager  *manager);
-void                  xfce_clipboard_manager_stop                (XfceClipboardManager  *manager);
+struct _GsdClipboardManagerClass
+{
+    GObjectClass parent_class;
+};
+
+GType gsd_clipboard_manager_get_type (void);
+
+gboolean gsd_clipboard_manager_start (GsdClipboardManager *manager,
+                                      gboolean             replace);
+
+void     gsd_clipboard_manager_stop  (GsdClipboardManager *manager);
 
 G_END_DECLS
 
-#endif /* __XFCE_CLIPBOARD_MANAGER_H */
+#endif /* __GSD_CLIPBOARD_MANAGER_H */
diff --git a/xfsettingsd/main.c b/xfsettingsd/main.c
index 3b37cda..075d291 100644
--- a/xfsettingsd/main.c
+++ b/xfsettingsd/main.c
@@ -112,7 +112,6 @@ dbus_connection_filter_func (DBusConnection     *connection,
 gint
 main (gint argc, gchar **argv)
 {
-    XfceClipboardManager *clipboard_daemon;
     GError               *error = NULL;
     GOptionContext       *context;
     GObject              *pointer_helper;
@@ -121,6 +120,7 @@ main (gint argc, gchar **argv)
     GObject              *shortcuts_helper;
     GObject              *keyboard_layout_helper;
     GObject              *xsettings_helper;
+    GObject              *clipboard_daemon = NULL;
 #ifdef HAVE_XRANDR
     GObject              *displays_helper;
 #endif
@@ -248,11 +248,16 @@ main (gint argc, gchar **argv)
     keyboard_layout_helper = g_object_new (XFCE_TYPE_KEYBOARD_LAYOUT_HELPER, NULL);
     workspaces_helper = g_object_new (XFCE_TYPE_WORKSPACES_HELPER, NULL);
 
-    clipboard_daemon = xfce_clipboard_manager_new ();
-    if (!xfce_clipboard_manager_start (clipboard_daemon))
+    if (g_getenv ("XFSETTINGSD_NO_CLIPBOARD") == NULL)
     {
-        g_object_unref (G_OBJECT (clipboard_daemon));
-        clipboard_daemon = NULL;
+        clipboard_daemon = g_object_new (GSD_TYPE_CLIPBOARD_MANAGER, NULL);
+        if (!gsd_clipboard_manager_start (GSD_CLIPBOARD_MANAGER (clipboard_daemon), opt_replace))
+        {
+            g_object_unref (G_OBJECT (clipboard_daemon));
+            clipboard_daemon = NULL;
+            
+            g_printerr (G_LOG_DOMAIN ": %s\n", "Another clipboard manager is already running.");
+        }
     }
 
     /* setup signal handlers to properly quit the main loop */
@@ -286,7 +291,7 @@ main (gint argc, gchar **argv)
 
     if (G_LIKELY (clipboard_daemon != NULL))
     {
-        xfce_clipboard_manager_stop (clipboard_daemon);
+        gsd_clipboard_manager_stop (GSD_CLIPBOARD_MANAGER (clipboard_daemon));
         g_object_unref (G_OBJECT (clipboard_daemon));
     }
 



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