moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 1069 insertions, 0 deletions

diff --git a/plugins/clipboard/gsd-clipboard-manager.c b/plugins/clipboard/gsd-clipboard-manager.c
new file mode 100644
index 0000000..fcbc839
--- /dev/null
+++ b/plugins/clipboard/gsd-clipboard-manager.c
@@ -0,0 +1,1069 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2007 Matthias Clasen
+ * Copyright (C) 2007 Anders Carlsson
+ * Copyright (C) 2007 Rodrigo Moya
+ * Copyright (C) 2007 William Jon McCann <[email protected]>
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * 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 "xutils.h"
+#include "list.h"
+
+#include "mate-settings-profile.h"
+#include "gsd-clipboard-manager.h"
+
+#define GSD_CLIPBOARD_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSD_TYPE_CLIPBOARD_MANAGER, GsdClipboardManagerPrivate))
+
+struct GsdClipboardManagerPrivate
+{
+        Display *display;
+        Window   window;
+        Time     timestamp;
+
+        List    *contents;
+        List    *conversions;
+
+        Window   requestor;
+        Atom     property;
+        Time     time;
+};
+
+typedef struct
+{
+        unsigned char *data;
+        int            length;
+        Atom           target;
+        Atom           type;
+        int            format;
+        int            refcount;
+} TargetData;
+
+typedef struct
+{
+        Atom        target;
+        TargetData *data;
+        Atom        property;
+        Window      requestor;
+        int         offset;
+} IncrConversion;
+
+static void     gsd_clipboard_manager_class_init  (GsdClipboardManagerClass *klass);
+static void     gsd_clipboard_manager_init        (GsdClipboardManager      *clipboard_manager);
+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);
+
+G_DEFINE_TYPE (GsdClipboardManager, gsd_clipboard_manager, G_TYPE_OBJECT)
+
+static gpointer manager_object = NULL;
+
+/* 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
+target_data_unref (TargetData *data)
+{
+        data->refcount--;
+        if (data->refcount == 0) {
+                free (data->data);
+                free (data);
+        }
+}
+
+static void
+conversion_free (IncrConversion *rdata)
+{
+        if (rdata->data) {
+                target_data_unref (rdata->data);
+        }
+        free (rdata);
+}
+
+static void
+send_selection_notify (GsdClipboardManager *manager,
+                       Bool                 success)
+{
+        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;
+
+        gdk_error_trap_push ();
+
+        XSendEvent (manager->priv->display,
+                    manager->priv->requestor,
+                    False,
+                    NoEventMask,
+                    (XEvent *)&notify);
+        XSync (manager->priv->display, False);
+
+        gdk_error_trap_pop ();
+}
+
+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;
+
+        gdk_error_trap_push ();
+
+        XSendEvent (xev->xselectionrequest.display,
+                    xev->xselectionrequest.requestor,
+                    False, NoEventMask, (XEvent *) &notify);
+        XSync (manager->priv->display, False);
+
+        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
+save_targets (GsdClipboardManager *manager,
+              Atom                *save_targets,
+              int                  nitems)
+{
+        int         nout, i;
+        Atom       *multiple;
+        TargetData *tdata;
+
+        multiple = (Atom *) malloc (2 * nitems * sizeof (Atom));
+
+        nout = 0;
+        for (i = 0; i < nitems; i++) {
+                if (save_targets[i] != XA_TARGETS &&
+                    save_targets[i] != XA_MULTIPLE &&
+                    save_targets[i] != XA_DELETE &&
+                    save_targets[i] != XA_INSERT_PROPERTY &&
+                    save_targets[i] != XA_INSERT_SELECTION &&
+                    save_targets[i] != XA_PIXMAP) {
+                        tdata = (TargetData *) malloc (sizeof (TargetData));
+                        tdata->data = NULL;
+                        tdata->length = 0;
+                        tdata->target = save_targets[i];
+                        tdata->type = None;
+                        tdata->format = 0;
+                        tdata->refcount = 1;
+                        manager->priv->contents = list_prepend (manager->priv->contents, tdata);
+
+                        multiple[nout++] = save_targets[i];
+                        multiple[nout++] = save_targets[i];
+                }
+        }
+
+        XFree (save_targets);
+
+        XChangeProperty (manager->priv->display, manager->priv->window,
+                         XA_MULTIPLE, XA_ATOM_PAIR,
+                         32, PropModeReplace, (const unsigned char *) multiple, nout);
+        free (multiple);
+
+        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 int
+find_content_type (TargetData *tdata,
+                   Atom        type)
+{
+        return tdata->type == type;
+}
+
+static int
+find_conversion_requestor (IncrConversion *rdata,
+                           XEvent         *xev)
+{
+        return (rdata->requestor == xev->xproperty.window &&
+                rdata->property == xev->xproperty.atom);
+}
+
+static void
+get_property (TargetData          *tdata,
+              GsdClipboardManager *manager)
+{
+        Atom           type;
+        int            format;
+        unsigned long  length;
+        unsigned long  remaining;
+        unsigned char *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 = list_remove (manager->priv->contents, tdata);
+                free (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;
+        }
+}
+
+static Bool
+receive_incrementally (GsdClipboardManager *manager,
+                       XEvent              *xev)
+{
+        List          *list;
+        TargetData    *tdata;
+        Atom           type;
+        int            format;
+        unsigned long  length, nitems, remaining;
+        unsigned char *data;
+
+        if (xev->xproperty.window != manager->priv->window)
+                return False;
+
+        list = list_find (manager->priv->contents,
+                          (ListFindFunc) find_content_target, (void *) xev->xproperty.atom);
+
+        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 (!list_find (manager->priv->contents,
+                                (ListFindFunc) find_content_type, (void *)XA_INCR)) {
+                        /* 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);
+                }
+        }
+
+        return True;
+}
+
+static Bool
+send_incrementally (GsdClipboardManager *manager,
+                    XEvent              *xev)
+{
+        List           *list;
+        IncrConversion *rdata;
+        unsigned long   length;
+        unsigned long   items;
+        unsigned char  *data;
+
+        list = list_find (manager->priv->conversions,
+                          (ListFindFunc) find_conversion_requestor, xev);
+        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 = list_remove (manager->priv->conversions, rdata);
+                conversion_free (rdata);
+        }
+
+        return True;
+}
+
+static void
+convert_clipboard_manager (GsdClipboardManager *manager,
+                           XEvent              *xev)
+{
+        Atom          type = None;
+        int           format;
+        unsigned long nitems;
+        unsigned long remaining;
+        Atom         *targets = NULL;
+
+        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,
+                                                    (unsigned char **) &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,
+                                 (unsigned char *) &manager->priv->timestamp, 1);
+
+                finish_selection_request (manager, xev, True);
+        } else if (xev->xselectionrequest.target == XA_TARGETS) {
+                int  n_targets = 0;
+                Atom targets[3];
+
+                targets[n_targets++] = XA_TARGETS;
+                targets[n_targets++] = XA_TIMESTAMP;
+                targets[n_targets++] = XA_SAVE_TARGETS;
+
+                XChangeProperty (manager->priv->display,
+                                 xev->xselectionrequest.requestor,
+                                 xev->xselectionrequest.property,
+                                 XA_ATOM, 32, PropModeReplace,
+                                 (unsigned char *) targets, n_targets);
+
+                finish_selection_request (manager, xev, True);
+        } else
+                finish_selection_request (manager, xev, False);
+}
+
+static void
+convert_clipboard_target (IncrConversion      *rdata,
+                          GsdClipboardManager *manager)
+{
+        TargetData       *tdata;
+        Atom             *targets;
+        int               n_targets;
+        List             *list;
+        unsigned long     items;
+        XWindowAttributes atts;
+
+        if (rdata->target == XA_TARGETS) {
+                n_targets = list_length (manager->priv->contents) + 2;
+                targets = (Atom *) malloc (n_targets * sizeof (Atom));
+
+                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,
+                                 (unsigned char *) targets, n_targets);
+                free (targets);
+        } else  {
+                /* Convert from stored CLIPBOARD data */
+                list = list_find (manager->priv->contents,
+                                  (ListFindFunc) find_content_target, (void *) rdata->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,
+                                         (unsigned char *) &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 = list_prepend (manager->priv->conversions, rdata);
+        else {
+                if (rdata->data) {
+                        target_data_unref (rdata->data);
+                        rdata->data = NULL;
+                }
+                free (rdata);
+        }
+}
+
+static void
+convert_clipboard (GsdClipboardManager *manager,
+                   XEvent              *xev)
+{
+        List           *list;
+        List           *conversions;
+        IncrConversion *rdata;
+        Atom            type;
+        int             i;
+        int             format;
+        unsigned long   nitems;
+        unsigned long   remaining;
+        Atom           *multiple;
+
+        conversions = NULL;
+        type = None;
+
+        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,
+                                    (unsigned char **) &multiple);
+
+                if (type != XA_ATOM_PAIR || nitems == 0) {
+                        if (multiple)
+                                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 = list_prepend (conversions, rdata);
+                }
+        } else {
+                multiple = NULL;
+
+                rdata = (IncrConversion *) malloc (sizeof (IncrConversion));
+                rdata->requestor = xev->xselectionrequest.requestor;
+                rdata->target = xev->xselectionrequest.target;
+                rdata->property = xev->xselectionrequest.property;
+                rdata->data = NULL;
+                rdata->offset = -1;
+                conversions = list_prepend (conversions, rdata);
+        }
+
+        list_foreach (conversions, (Callback) 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,
+                                         (unsigned char *) multiple, nitems);
+                }
+                finish_selection_request (manager, xev, True);
+        }
+
+        list_foreach (conversions, (Callback) collect_incremental, manager);
+        list_free (conversions);
+
+        if (multiple)
+                free (multiple);
+}
+
+static Bool
+clipboard_manager_process_event (GsdClipboardManager *manager,
+                                 XEvent              *xev)
+{
+        Atom          type;
+        int           format;
+        unsigned long nitems;
+        unsigned long remaining;
+        Atom         *targets;
+
+        targets = NULL;
+
+        switch (xev->xany.type) {
+        case DestroyNotify:
+                if (xev->xdestroywindow.window == manager->priv->requestor) {
+                        list_foreach (manager->priv->contents, (Callback)target_data_unref, NULL);
+                        list_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);
+                }
+
+        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) {
+                                list_foreach (manager->priv->contents, (Callback)target_data_unref, NULL);
+                                list_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 */
+                        list_foreach (manager->priv->contents, (Callback)target_data_unref, NULL);
+                        list_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,
+                                                    (unsigned char **) &targets);
+
+                                save_targets (manager, targets, nitems);
+                        } else if (xev->xselection.property == XA_MULTIPLE) {
+                                List *tmp;
+
+                                tmp = list_copy (manager->priv->contents);
+                                list_foreach (tmp, (Callback) get_property, manager);
+                                list_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,
+                                                         (unsigned char *)&XA_NULL, 1);
+
+                                if (!list_find (manager->priv->contents,
+                                                (ListFindFunc)find_content_type, (void *)XA_INCR)) {
+                                        /* 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;
+        }
+}
+
+static void
+clipboard_manager_watch_cb (GsdClipboardManager *manager,
+                            Window               window,
+                            Bool                 is_start,
+                            long                 mask,
+                            void                *cb_data)
+{
+        GdkWindow  *gdkwin;
+        GdkDisplay *display;
+
+        display = gdk_display_get_default ();
+        gdkwin = gdk_window_lookup_for_display (display, window);
+
+        if (is_start) {
+                if (gdkwin == NULL) {
+                        gdkwin = gdk_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 gboolean
+start_clipboard_idle_cb (GsdClipboardManager *manager)
+{
+        XClientMessageEvent xev;
+
+
+        mate_settings_profile_start (NULL);
+
+        init_atoms (manager->priv->display);
+
+        /* check if there is a clipboard manager running */
+        if (XGetSelectionOwner (manager->priv->display, XA_CLIPBOARD_MANAGER)) {
+                g_warning ("Clipboard manager is already running.");
+                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 = 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);
+                /* FIXME: manager->priv->terminate (manager->priv->cb_data); */
+        }
+
+        mate_settings_profile_end (NULL);
+
+        return FALSE;
+}
+
+gboolean
+gsd_clipboard_manager_start (GsdClipboardManager *manager,
+                             GError             **error)
+{
+        mate_settings_profile_start (NULL);
+
+        g_idle_add ((GSourceFunc) start_clipboard_idle_cb, manager);
+
+        mate_settings_profile_end (NULL);
+
+        return TRUE;
+}
+
+void
+gsd_clipboard_manager_stop (GsdClipboardManager *manager)
+{
+        g_debug ("Stopping clipboard manager");
+
+        clipboard_manager_watch_cb (manager,
+                                    manager->priv->window,
+                                    FALSE,
+                                    0,
+                                    NULL);
+        XDestroyWindow (manager->priv->display, manager->priv->window);
+
+        list_foreach (manager->priv->conversions, (Callback) conversion_free, NULL);
+        list_free (manager->priv->conversions);
+
+        list_foreach (manager->priv->contents, (Callback) target_data_unref, NULL);
+        list_free (manager->priv->contents);
+}
+
+static void
+gsd_clipboard_manager_set_property (GObject        *object,
+                                    guint           prop_id,
+                                    const GValue   *value,
+                                    GParamSpec     *pspec)
+{
+        GsdClipboardManager *self;
+
+        self = GSD_CLIPBOARD_MANAGER (object);
+
+        switch (prop_id) {
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static void
+gsd_clipboard_manager_get_property (GObject        *object,
+                                    guint           prop_id,
+                                    GValue         *value,
+                                    GParamSpec     *pspec)
+{
+        GsdClipboardManager *self;
+
+        self = GSD_CLIPBOARD_MANAGER (object);
+
+        switch (prop_id) {
+        default:
+                G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+                break;
+        }
+}
+
+static GObject *
+gsd_clipboard_manager_constructor (GType                  type,
+                                   guint                  n_construct_properties,
+                                   GObjectConstructParam *construct_properties)
+{
+        GsdClipboardManager      *clipboard_manager;
+        GsdClipboardManagerClass *klass;
+
+        klass = GSD_CLIPBOARD_MANAGER_CLASS (g_type_class_peek (GSD_TYPE_CLIPBOARD_MANAGER));
+
+        clipboard_manager = GSD_CLIPBOARD_MANAGER (G_OBJECT_CLASS (gsd_clipboard_manager_parent_class)->constructor (type,
+                                                                                                      n_construct_properties,
+                                                                                                      construct_properties));
+
+        return G_OBJECT (clipboard_manager);
+}
+
+static void
+gsd_clipboard_manager_dispose (GObject *object)
+{
+        GsdClipboardManager *clipboard_manager;
+
+        clipboard_manager = GSD_CLIPBOARD_MANAGER (object);
+
+        G_OBJECT_CLASS (gsd_clipboard_manager_parent_class)->dispose (object);
+}
+
+static void
+gsd_clipboard_manager_class_init (GsdClipboardManagerClass *klass)
+{
+        GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+
+        object_class->get_property = gsd_clipboard_manager_get_property;
+        object_class->set_property = gsd_clipboard_manager_set_property;
+        object_class->constructor = gsd_clipboard_manager_constructor;
+        object_class->dispose = gsd_clipboard_manager_dispose;
+        object_class->finalize = gsd_clipboard_manager_finalize;
+
+        g_type_class_add_private (klass, sizeof (GsdClipboardManagerPrivate));
+}
+
+static void
+gsd_clipboard_manager_init (GsdClipboardManager *manager)
+{
+        manager->priv = GSD_CLIPBOARD_MANAGER_GET_PRIVATE (manager);
+
+        manager->priv->display = GDK_DISPLAY_XDISPLAY (gdk_display_get_default ());
+
+}
+
+static void
+gsd_clipboard_manager_finalize (GObject *object)
+{
+        GsdClipboardManager *clipboard_manager;
+
+        g_return_if_fail (object != NULL);
+        g_return_if_fail (GSD_IS_CLIPBOARD_MANAGER (object));
+
+        clipboard_manager = GSD_CLIPBOARD_MANAGER (object);
+
+        g_return_if_fail (clipboard_manager->priv != NULL);
+
+        G_OBJECT_CLASS (gsd_clipboard_manager_parent_class)->finalize (object);
+}
+
+GsdClipboardManager *
+gsd_clipboard_manager_new (void)
+{
+        if (manager_object != NULL) {
+                g_object_ref (manager_object);
+        } else {
+                manager_object = g_object_new (GSD_TYPE_CLIPBOARD_MANAGER, NULL);
+                g_object_add_weak_pointer (manager_object,
+                                           (gpointer *) &manager_object);
+        }
+
+        return GSD_CLIPBOARD_MANAGER (manager_object);
+}