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gtk2/gtk/gtkplug.c
Matthias Clasen a26ffdc740 Prevent a segfault in GtkPlug 
The grabbed_keys might be NULL, so deal with that.
https://bugzilla.gnome.org/show_bug.cgi?id=641023
2011-01-31 10:17:21 -05:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* By Owen Taylor <otaylor@gtk.org> 98/4/4 */
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtkdebug.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtkplug.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtksocketprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkwindowprivate.h"
#include "gtkxembed.h"
#include <gdk/gdkx.h>
/**
* SECTION:gtkplug
* @Short_description: Toplevel for embedding into other processes
* @Title: GtkPlug
* @include: gtk/gtkx.h
* @See_also: #GtkSocket
*
* Together with #GtkSocket, #GtkPlug provides the ability to embed
* widgets from one process into another process in a fashion that is
* transparent to the user. One process creates a #GtkSocket widget
* and passes the ID of that widget's window to the other process,
* which then creates a #GtkPlug with that window ID. Any widgets
* contained in the #GtkPlug then will appear inside the first
* application's window.
*
* The communication between a #GtkSocket and a #GtkPlug follows the
* <ulink url="http://www.freedesktop.org/Standards/xembed-spec">XEmbed</ulink>
* protocol. This protocol has also been implemented in other toolkits,
* e.g. <application>Qt</application>, allowing the same level of
* integration when embedding a <application>Qt</application> widget
* in GTK+ or vice versa.
*
* <note>
* The #GtkPlug and #GtkSocket widgets are only available when GTK+
* is compiled for the X11 platform and %GDK_WINDOWING_X11 is defined.
* They can only be used on a #GdkX11Display. To use #GtkPlug and
* #GtkSocket, you need to include the <filename>gtk/gtkx.h</filename>
* header.
* </note>
*/
struct _GtkPlugPrivate
{
GtkWidget *modality_window;
GtkWindowGroup *modality_group;
GdkWindow *socket_window;
GHashTable *grabbed_keys;
guint same_app : 1;
};
static void gtk_plug_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_plug_finalize (GObject *object);
static void gtk_plug_realize (GtkWidget *widget);
static void gtk_plug_unrealize (GtkWidget *widget);
static void gtk_plug_show (GtkWidget *widget);
static void gtk_plug_hide (GtkWidget *widget);
static void gtk_plug_map (GtkWidget *widget);
static void gtk_plug_unmap (GtkWidget *widget);
static void gtk_plug_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gtk_plug_key_press_event (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_plug_focus_event (GtkWidget *widget,
GdkEventFocus *event);
static void gtk_plug_set_focus (GtkWindow *window,
GtkWidget *focus);
static gboolean gtk_plug_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gtk_plug_check_resize (GtkContainer *container);
static void gtk_plug_keys_changed (GtkWindow *window);
static void xembed_set_info (GdkWindow *window,
unsigned long flags);
static GtkBinClass *bin_class = NULL;
typedef struct
{
guint accelerator_key;
GdkModifierType accelerator_mods;
} GrabbedKey;
enum {
PROP_0,
PROP_EMBEDDED,
PROP_SOCKET_WINDOW
};
enum {
EMBEDDED,
LAST_SIGNAL
};
static guint plug_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GtkPlug, gtk_plug, GTK_TYPE_WINDOW)
static void
gtk_plug_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkPlug *plug = GTK_PLUG (object);
GtkPlugPrivate *priv = plug->priv;
switch (prop_id)
{
case PROP_EMBEDDED:
g_value_set_boolean (value, priv->socket_window != NULL);
break;
case PROP_SOCKET_WINDOW:
g_value_set_object (value, priv->socket_window);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_plug_class_init (GtkPlugClass *class)
{
GObjectClass *gobject_class = (GObjectClass *)class;
GtkWidgetClass *widget_class = (GtkWidgetClass *)class;
GtkWindowClass *window_class = (GtkWindowClass *)class;
GtkContainerClass *container_class = (GtkContainerClass *)class;
bin_class = g_type_class_peek (GTK_TYPE_BIN);
gobject_class->get_property = gtk_plug_get_property;
gobject_class->finalize = gtk_plug_finalize;
widget_class->realize = gtk_plug_realize;
widget_class->unrealize = gtk_plug_unrealize;
widget_class->key_press_event = gtk_plug_key_press_event;
widget_class->focus_in_event = gtk_plug_focus_event;
widget_class->focus_out_event = gtk_plug_focus_event;
widget_class->show = gtk_plug_show;
widget_class->hide = gtk_plug_hide;
widget_class->map = gtk_plug_map;
widget_class->unmap = gtk_plug_unmap;
widget_class->size_allocate = gtk_plug_size_allocate;
widget_class->focus = gtk_plug_focus;
container_class->check_resize = gtk_plug_check_resize;
window_class->set_focus = gtk_plug_set_focus;
window_class->keys_changed = gtk_plug_keys_changed;
/**
* GtkPlug:embedded:
*
* %TRUE if the plug is embedded in a socket.
*
* Since: 2.12
*/
g_object_class_install_property (gobject_class,
PROP_EMBEDDED,
g_param_spec_boolean ("embedded",
P_("Embedded"),
P_("Whether the plug is embedded"),
FALSE,
GTK_PARAM_READABLE));
/**
* GtkPlug:socket-window:
*
* The window of the socket the plug is embedded in.
*
* Since: 2.14
*/
g_object_class_install_property (gobject_class,
PROP_SOCKET_WINDOW,
g_param_spec_object ("socket-window",
P_("Socket Window"),
P_("The window of the socket the plug is embedded in"),
GDK_TYPE_WINDOW,
GTK_PARAM_READABLE));
/**
* GtkPlug::embedded:
* @plug: the object on which the signal was emitted
*
* Gets emitted when the plug becomes embedded in a socket.
*/
plug_signals[EMBEDDED] =
g_signal_new (I_("embedded"),
G_OBJECT_CLASS_TYPE (class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkPlugClass, embedded),
NULL, NULL,
_gtk_marshal_VOID__VOID,
G_TYPE_NONE, 0);
g_type_class_add_private (class, sizeof (GtkPlugPrivate));
}
static void
gtk_plug_init (GtkPlug *plug)
{
plug->priv = G_TYPE_INSTANCE_GET_PRIVATE (plug,
GTK_TYPE_PLUG,
GtkPlugPrivate);
}
/**
* gtk_plug_handle_modality_on:
*
* @plug: a #GtkPlug
*
* Called from the GtkPlug backend when the corresponding socket has
* told the plug that it modality has toggled on.
*/
static void
gtk_plug_handle_modality_on (GtkPlug *plug)
{
GtkPlugPrivate *priv = plug->priv;
if (!priv->modality_window)
{
priv->modality_window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_screen (GTK_WINDOW (priv->modality_window),
gtk_widget_get_screen (GTK_WIDGET (plug)));
gtk_widget_realize (priv->modality_window);
gtk_window_group_add_window (priv->modality_group, GTK_WINDOW (priv->modality_window));
gtk_grab_add (priv->modality_window);
}
}
/**
* gtk_plug_handle_modality_off:
*
* @plug: a #GtkPlug
*
* Called from the GtkPlug backend when the corresponding socket has
* told the plug that it modality has toggled off.
*/
static void
gtk_plug_handle_modality_off (GtkPlug *plug)
{
GtkPlugPrivate *priv = plug->priv;
if (priv->modality_window)
{
gtk_widget_destroy (priv->modality_window);
priv->modality_window = NULL;
}
}
static void
gtk_plug_set_is_child (GtkPlug *plug,
gboolean is_child)
{
GtkPlugPrivate *priv = plug->priv;
GtkWidget *widget = GTK_WIDGET (plug);
g_assert (!gtk_widget_get_parent (widget));
if (is_child)
{
if (priv->modality_window)
gtk_plug_handle_modality_off (plug);
if (priv->modality_group)
{
gtk_window_group_remove_window (priv->modality_group, GTK_WINDOW (plug));
g_object_unref (priv->modality_group);
priv->modality_group = NULL;
}
/* As a toplevel, the MAPPED flag doesn't correspond
* to whether the widget->window is mapped; we unmap
* here, but don't bother remapping -- we will get mapped
* by gtk_widget_set_parent ().
*/
if (gtk_widget_get_mapped (widget))
gtk_widget_unmap (widget);
_gtk_window_set_is_toplevel (GTK_WINDOW (plug), FALSE);
gtk_container_set_resize_mode (GTK_CONTAINER (plug), GTK_RESIZE_PARENT);
_gtk_widget_propagate_hierarchy_changed (widget, widget);
}
else
{
if (gtk_window_get_focus (GTK_WINDOW (plug)))
gtk_window_set_focus (GTK_WINDOW (plug), NULL);
if (gtk_window_get_default_widget (GTK_WINDOW (plug)))
gtk_window_set_default (GTK_WINDOW (plug), NULL);
priv->modality_group = gtk_window_group_new ();
gtk_window_group_add_window (priv->modality_group, GTK_WINDOW (plug));
_gtk_window_set_is_toplevel (GTK_WINDOW (plug), TRUE);
gtk_container_set_resize_mode (GTK_CONTAINER (plug), GTK_RESIZE_QUEUE);
_gtk_widget_propagate_hierarchy_changed (GTK_WIDGET (plug), NULL);
}
}
/**
* gtk_plug_get_id:
* @plug: a #GtkPlug.
*
* Gets the window ID of a #GtkPlug widget, which can then
* be used to embed this window inside another window, for
* instance with gtk_socket_add_id().
*
* Return value: the window ID for the plug
**/
Window
gtk_plug_get_id (GtkPlug *plug)
{
g_return_val_if_fail (GTK_IS_PLUG (plug), 0);
if (!gtk_widget_get_realized (GTK_WIDGET (plug)))
gtk_widget_realize (GTK_WIDGET (plug));
return GDK_WINDOW_XID (gtk_widget_get_window (GTK_WIDGET (plug)));
}
/**
* gtk_plug_get_embedded:
* @plug: a #GtkPlug
*
* Determines whether the plug is embedded in a socket.
*
* Return value: %TRUE if the plug is embedded in a socket
*
* Since: 2.14
**/
gboolean
gtk_plug_get_embedded (GtkPlug *plug)
{
g_return_val_if_fail (GTK_IS_PLUG (plug), FALSE);
return plug->priv->socket_window != NULL;
}
/**
* gtk_plug_get_socket_window:
* @plug: a #GtkPlug
*
* Retrieves the socket the plug is embedded in.
*
* Return value: (transfer none): the window of the socket, or %NULL
*
* Since: 2.14
**/
GdkWindow *
gtk_plug_get_socket_window (GtkPlug *plug)
{
g_return_val_if_fail (GTK_IS_PLUG (plug), NULL);
return plug->priv->socket_window;
}
/**
* _gtk_plug_add_to_socket:
* @plug: a #GtkPlug
* @socket_: a #GtkSocket
*
* Adds a plug to a socket within the same application.
**/
void
_gtk_plug_add_to_socket (GtkPlug *plug,
GtkSocket *socket_)
{
GtkPlugPrivate *priv;
GtkWidget *widget;
g_return_if_fail (GTK_IS_PLUG (plug));
g_return_if_fail (GTK_IS_SOCKET (socket_));
g_return_if_fail (gtk_widget_get_realized (GTK_WIDGET (socket_)));
priv = plug->priv;
widget = GTK_WIDGET (plug);
gtk_plug_set_is_child (plug, TRUE);
priv->same_app = TRUE;
socket_->priv->same_app = TRUE;
socket_->priv->plug_widget = widget;
priv->socket_window = gtk_widget_get_window (GTK_WIDGET (socket_));
g_object_ref (priv->socket_window);
g_signal_emit (plug, plug_signals[EMBEDDED], 0);
g_object_notify (G_OBJECT (plug), "embedded");
if (gtk_widget_get_realized (widget))
{
GdkWindow *window;
window = gtk_widget_get_window (widget);
gdk_window_reparent (window, priv->socket_window,
-gdk_window_get_width (window),
-gdk_window_get_height (window));
}
gtk_widget_set_parent (widget, GTK_WIDGET (socket_));
g_signal_emit_by_name (socket_, "plug-added");
}
/**
* _gtk_plug_send_delete_event:
* @widget: a #GtkWidget
*
* Send a GDK_DELETE event to the @widget and destroy it if
* necessary. Internal GTK function, called from this file or the
* backend-specific GtkPlug implementation.
*/
void
_gtk_plug_send_delete_event (GtkWidget *widget)
{
GdkEvent *event = gdk_event_new (GDK_DELETE);
event->any.window = g_object_ref (gtk_widget_get_window (widget));
event->any.send_event = FALSE;
g_object_ref (widget);
if (!gtk_widget_event (widget, event))
gtk_widget_destroy (widget);
g_object_unref (widget);
gdk_event_free (event);
}
/**
* _gtk_plug_remove_from_socket:
* @plug: a #GtkPlug
* @socket_: a #GtkSocket
*
* Removes a plug from a socket within the same application.
**/
void
_gtk_plug_remove_from_socket (GtkPlug *plug,
GtkSocket *socket_)
{
GtkPlugPrivate *priv;
GtkWidget *widget;
GdkWindow *window;
gboolean result;
gboolean widget_was_visible;
g_return_if_fail (GTK_IS_PLUG (plug));
g_return_if_fail (GTK_IS_SOCKET (socket_));
g_return_if_fail (gtk_widget_get_realized (GTK_WIDGET (plug)));
priv = plug->priv;
widget = GTK_WIDGET (plug);
if (_gtk_widget_get_in_reparent (widget))
return;
g_object_ref (plug);
g_object_ref (socket_);
widget_was_visible = gtk_widget_get_visible (widget);
window = gtk_widget_get_window (widget);
gdk_window_hide (window);
_gtk_widget_set_in_reparent (widget, TRUE);
gdk_window_reparent (window,
gtk_widget_get_root_window (widget),
0, 0);
gtk_widget_unparent (GTK_WIDGET (plug));
_gtk_widget_set_in_reparent (widget, FALSE);
socket_->priv->plug_widget = NULL;
if (socket_->priv->plug_window != NULL)
{
g_object_unref (socket_->priv->plug_window);
socket_->priv->plug_window = NULL;
}
socket_->priv->same_app = FALSE;
priv->same_app = FALSE;
if (priv->socket_window != NULL)
{
g_object_unref (priv->socket_window);
priv->socket_window = NULL;
}
gtk_plug_set_is_child (plug, FALSE);
g_signal_emit_by_name (socket_, "plug-removed", &result);
if (!result)
gtk_widget_destroy (GTK_WIDGET (socket_));
if (window)
_gtk_plug_send_delete_event (widget);
g_object_unref (plug);
if (widget_was_visible && gtk_widget_get_visible (GTK_WIDGET (socket_)))
gtk_widget_queue_resize (GTK_WIDGET (socket_));
g_object_unref (socket_);
}
/**
* gtk_plug_construct:
* @plug: a #GtkPlug.
* @socket_id: the XID of the socket's window.
*
* Finish the initialization of @plug for a given #GtkSocket identified by
* @socket_id. This function will generally only be used by classes deriving from #GtkPlug.
**/
void
gtk_plug_construct (GtkPlug *plug,
Window socket_id)
{
gtk_plug_construct_for_display (plug, gdk_display_get_default (), socket_id);
}
/**
* gtk_plug_construct_for_display:
* @plug: a #GtkPlug.
* @display: the #GdkDisplay associated with @socket_id's
* #GtkSocket.
* @socket_id: the XID of the socket's window.
*
* Finish the initialization of @plug for a given #GtkSocket identified by
* @socket_id which is currently displayed on @display.
* This function will generally only be used by classes deriving from #GtkPlug.
*
* Since: 2.2
**/
void
gtk_plug_construct_for_display (GtkPlug *plug,
GdkDisplay *display,
Window socket_id)
{
GtkPlugPrivate *priv;
g_return_if_fail (GTK_IS_PLUG (plug));
g_return_if_fail (GDK_IS_DISPLAY (display));
priv = plug->priv;
if (socket_id)
{
gpointer user_data = NULL;
if (GDK_IS_X11_DISPLAY (display))
priv->socket_window = gdk_x11_window_lookup_for_display (display, socket_id);
else
priv->socket_window = NULL;
if (priv->socket_window)
{
gdk_window_get_user_data (priv->socket_window, &user_data);
if (user_data)
{
if (GTK_IS_SOCKET (user_data))
_gtk_plug_add_to_socket (plug, user_data);
else
{
g_warning (G_STRLOC "Can't create GtkPlug as child of non-GtkSocket");
priv->socket_window = NULL;
}
}
else
g_object_ref (priv->socket_window);
}
else if (GDK_IS_X11_DISPLAY (display))
priv->socket_window = gdk_x11_window_foreign_new_for_display (display, socket_id);
if (priv->socket_window) {
g_signal_emit (plug, plug_signals[EMBEDDED], 0);
g_object_notify (G_OBJECT (plug), "embedded");
}
}
}
/**
* gtk_plug_new:
* @socket_id: the window ID of the socket, or 0.
*
* Creates a new plug widget inside the #GtkSocket identified
* by @socket_id. If @socket_id is 0, the plug is left "unplugged" and
* can later be plugged into a #GtkSocket by gtk_socket_add_id().
*
* Return value: the new #GtkPlug widget.
**/
GtkWidget*
gtk_plug_new (Window socket_id)
{
return gtk_plug_new_for_display (gdk_display_get_default (), socket_id);
}
/**
* gtk_plug_new_for_display:
* @display: the #GdkDisplay on which @socket_id is displayed
* @socket_id: the XID of the socket's window.
*
* Create a new plug widget inside the #GtkSocket identified by socket_id.
*
* Return value: the new #GtkPlug widget.
*
* Since: 2.2
*/
GtkWidget*
gtk_plug_new_for_display (GdkDisplay *display,
Window socket_id)
{
GtkPlug *plug;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
plug = g_object_new (GTK_TYPE_PLUG, NULL);
gtk_plug_construct_for_display (plug, display, socket_id);
return GTK_WIDGET (plug);
}
static void
gtk_plug_finalize (GObject *object)
{
GtkPlug *plug = GTK_PLUG (object);
GtkPlugPrivate *priv = plug->priv;
if (priv->grabbed_keys)
g_hash_table_destroy (priv->grabbed_keys);
G_OBJECT_CLASS (gtk_plug_parent_class)->finalize (object);
}
static void
gtk_plug_unrealize (GtkWidget *widget)
{
GtkPlug *plug = GTK_PLUG (widget);
GtkPlugPrivate *priv = plug->priv;
if (priv->socket_window != NULL)
{
gdk_window_set_user_data (priv->socket_window, NULL);
g_object_unref (priv->socket_window);
priv->socket_window = NULL;
g_object_notify (G_OBJECT (widget), "embedded");
}
if (!priv->same_app)
{
if (priv->modality_window)
gtk_plug_handle_modality_off (plug);
gtk_window_group_remove_window (priv->modality_group, GTK_WINDOW (plug));
g_object_unref (priv->modality_group);
}
GTK_WIDGET_CLASS (gtk_plug_parent_class)->unrealize (widget);
}
static void
xembed_set_info (GdkWindow *window,
unsigned long flags)
{
GdkDisplay *display = gdk_window_get_display (window);
unsigned long buffer[2];
Atom xembed_info_atom = gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED_INFO");
buffer[0] = GTK_XEMBED_PROTOCOL_VERSION;
buffer[1] = flags;
XChangeProperty (GDK_DISPLAY_XDISPLAY (display),
GDK_WINDOW_XID (window),
xembed_info_atom, xembed_info_atom, 32,
PropModeReplace,
(unsigned char *)buffer, 2);
}
/**
* gtk_plug_focus_first_last:
*
* @plug: a #GtkPlug
* @direction: a direction
*
* Called from the GtkPlug backend when the corresponding socket has
* told the plug that it has received the focus.
*/
static void
gtk_plug_focus_first_last (GtkPlug *plug,
GtkDirectionType direction)
{
GtkWindow *window = GTK_WINDOW (plug);
GtkWidget *focus_widget;
GtkWidget *parent;
focus_widget = gtk_window_get_focus (window);
if (focus_widget)
{
parent = gtk_widget_get_parent (focus_widget);
while (parent)
{
gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
parent = gtk_widget_get_parent (parent);
}
gtk_window_set_focus (GTK_WINDOW (plug), NULL);
}
gtk_widget_child_focus (GTK_WIDGET (plug), direction);
}
static void
handle_xembed_message (GtkPlug *plug,
XEmbedMessageType message,
glong detail,
glong data1,
glong data2,
guint32 time)
{
GtkWindow *window = GTK_WINDOW (plug);
GTK_NOTE (PLUGSOCKET,
g_message ("GtkPlug: %s received", _gtk_xembed_message_name (message)));
switch (message)
{
case XEMBED_EMBEDDED_NOTIFY:
break;
case XEMBED_WINDOW_ACTIVATE:
_gtk_window_set_is_active (window, TRUE);
break;
case XEMBED_WINDOW_DEACTIVATE:
_gtk_window_set_is_active (window, FALSE);
break;
case XEMBED_MODALITY_ON:
gtk_plug_handle_modality_on (plug);
break;
case XEMBED_MODALITY_OFF:
gtk_plug_handle_modality_off (plug);
break;
case XEMBED_FOCUS_IN:
_gtk_window_set_has_toplevel_focus (window, TRUE);
switch (detail)
{
case XEMBED_FOCUS_FIRST:
gtk_plug_focus_first_last (plug, GTK_DIR_TAB_FORWARD);
break;
case XEMBED_FOCUS_LAST:
gtk_plug_focus_first_last (plug, GTK_DIR_TAB_BACKWARD);
break;
case XEMBED_FOCUS_CURRENT:
break;
}
break;
case XEMBED_FOCUS_OUT:
_gtk_window_set_has_toplevel_focus (window, FALSE);
break;
case XEMBED_GRAB_KEY:
case XEMBED_UNGRAB_KEY:
case XEMBED_GTK_GRAB_KEY:
case XEMBED_GTK_UNGRAB_KEY:
case XEMBED_REQUEST_FOCUS:
case XEMBED_FOCUS_NEXT:
case XEMBED_FOCUS_PREV:
g_warning ("GtkPlug: Invalid _XEMBED message %s received", _gtk_xembed_message_name (message));
break;
default:
GTK_NOTE(PLUGSOCKET,
g_message ("GtkPlug: Ignoring unknown _XEMBED message of type %d", message));
break;
}
}
static GdkFilterReturn
gtk_plug_filter_func (GdkXEvent *gdk_xevent,
GdkEvent *event,
gpointer data)
{
GdkScreen *screen = gdk_window_get_screen (event->any.window);
GdkDisplay *display = gdk_screen_get_display (screen);
GtkPlug *plug = GTK_PLUG (data);
GtkPlugPrivate *priv = plug->priv;
XEvent *xevent = (XEvent *)gdk_xevent;
GHashTableIter iter;
gpointer key;
GdkFilterReturn return_val;
return_val = GDK_FILTER_CONTINUE;
switch (xevent->type)
{
case ClientMessage:
if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "_XEMBED"))
{
_gtk_xembed_push_message (xevent);
handle_xembed_message (plug,
xevent->xclient.data.l[1],
xevent->xclient.data.l[2],
xevent->xclient.data.l[3],
xevent->xclient.data.l[4],
xevent->xclient.data.l[0]);
_gtk_xembed_pop_message ();
return_val = GDK_FILTER_REMOVE;
}
else if (xevent->xclient.message_type == gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW"))
{
/* We filter these out because we take being reparented back to the
* root window as the reliable end of the embedding protocol
*/
return_val = GDK_FILTER_REMOVE;
}
break;
case ReparentNotify:
{
XReparentEvent *xre = &xevent->xreparent;
gboolean was_embedded = priv->socket_window != NULL;
GTK_NOTE (PLUGSOCKET, g_message("GtkPlug: ReparentNotify received"));
return_val = GDK_FILTER_REMOVE;
g_object_ref (plug);
if (was_embedded)
{
/* End of embedding protocol for previous socket */
GTK_NOTE (PLUGSOCKET, g_message ("GtkPlug: end of embedding"));
/* FIXME: race if we remove from another socket and
* then add to a local window before we get notification
* Probably need check in _gtk_plug_add_to_socket
*/
if (xre->parent != GDK_WINDOW_XID (priv->socket_window))
{
GtkWidget *widget = GTK_WIDGET (plug);
gdk_window_set_user_data (priv->socket_window, NULL);
g_object_unref (priv->socket_window);
priv->socket_window = NULL;
/* Emit a delete window, as if the user attempted
* to close the toplevel. Simple as to how we
* handle WM_DELETE_WINDOW, if it isn't handled
* we destroy the widget. BUt only do this if
* we are being reparented to the root window.
* Moving from one embedder to another should
* be invisible to the app.
*/
if (xre->parent == GDK_WINDOW_XID (gdk_screen_get_root_window (screen)))
{
GTK_NOTE (PLUGSOCKET, g_message ("GtkPlug: calling gtk_plug_send_delete_event()"));
_gtk_plug_send_delete_event (widget);
g_object_notify (G_OBJECT (plug), "embedded");
}
}
else
goto done;
}
if (xre->parent != GDK_WINDOW_XID (gdk_screen_get_root_window (screen)))
{
/* Start of embedding protocol */
GTK_NOTE (PLUGSOCKET, g_message ("GtkPlug: start of embedding"));
priv->socket_window = gdk_x11_window_lookup_for_display (display, xre->parent);
if (priv->socket_window)
{
gpointer user_data = NULL;
gdk_window_get_user_data (priv->socket_window, &user_data);
if (user_data)
{
g_warning (G_STRLOC "Plug reparented unexpectedly into window in the same process");
priv->socket_window = NULL;
break; /* FIXME: shouldn't this unref the plug? i.e. "goto done;" instead */
}
g_object_ref (priv->socket_window);
}
else
{
priv->socket_window = gdk_x11_window_foreign_new_for_display (display, xre->parent);
if (!priv->socket_window) /* Already gone */
break; /* FIXME: shouldn't this unref the plug? i.e. "goto done;" instead */
}
if (priv->grabbed_keys)
{
g_hash_table_iter_init (&iter, priv->grabbed_keys);
while (g_hash_table_iter_next (&iter, &key, NULL))
{
GrabbedKey *grabbed_key = key;
_gtk_xembed_send_message (priv->socket_window, XEMBED_GTK_GRAB_KEY, 0,
grabbed_key->accelerator_key,
grabbed_key->accelerator_mods);
}
}
if (!was_embedded)
g_signal_emit_by_name (plug, "embedded");
g_object_notify (G_OBJECT (plug), "embedded");
}
done:
g_object_unref (plug);
break;
}
case KeyPress:
case KeyRelease:
{
GdkModifierType state, consumed;
GdkDeviceManager *device_manager;
GdkDevice *pointer, *keyboard;
GdkKeymap *keymap;
if (xevent->type == KeyPress)
event->key.type = GDK_KEY_PRESS;
else
event->key.type = GDK_KEY_RELEASE;
event->key.window = gdk_x11_window_lookup_for_display (display, xevent->xany.window);
event->key.send_event = TRUE;
event->key.time = xevent->xkey.time;
event->key.state = (GdkModifierType) xevent->xkey.state;
event->key.hardware_keycode = xevent->xkey.keycode;
event->key.keyval = GDK_KEY_VoidSymbol;
device_manager = gdk_display_get_device_manager (display);
pointer = gdk_device_manager_get_client_pointer (device_manager);
keyboard = gdk_device_get_associated_device (pointer);
gdk_event_set_device (event, keyboard);
keymap = gdk_keymap_get_for_display (display);
gdk_keymap_translate_keyboard_state (keymap,
event->key.hardware_keycode,
event->key.state,
event->key.group,
&event->key.keyval,
NULL, NULL, &consumed);
state = event->key.state & ~consumed;
gdk_keymap_add_virtual_modifiers (keymap, &state);
event->key.state |= state;
event->key.length = 0;
event->key.string = g_strdup ("");
/* FIXME: These should be filled in properly */
event->key.group = 0;
event->key.is_modifier = FALSE;
return_val = GDK_FILTER_TRANSLATE;
}
}
return return_val;
}
static void
gtk_plug_realize (GtkWidget *widget)
{
GtkAllocation allocation;
GtkPlug *plug = GTK_PLUG (widget);
GtkPlugPrivate *priv = plug->priv;
GtkWindow *window = GTK_WINDOW (widget);
GdkWindow *gdk_window;
GdkWindowAttr attributes;
const gchar *title;
gchar *wmclass_name, *wmclass_class;
gint attributes_mask;
gtk_widget_set_realized (widget, TRUE);
title = gtk_window_get_title (window);
_gtk_window_get_wmclass (window, &wmclass_name, &wmclass_class);
gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD; /* XXX GDK_WINDOW_PLUG ? */
attributes.title = (gchar *) title;
attributes.wmclass_name = wmclass_name;
attributes.wmclass_class = wmclass_class;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
/* this isn't right - we should match our parent's visual/colormap.
* though that will require handling "foreign" colormaps */
attributes.visual = gtk_widget_get_visual (widget);
attributes.event_mask = gtk_widget_get_events (widget);
attributes.event_mask |= (GDK_EXPOSURE_MASK |
GDK_KEY_PRESS_MASK |
GDK_KEY_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK |
GDK_STRUCTURE_MASK);
attributes_mask = GDK_WA_VISUAL;
attributes_mask |= (title ? GDK_WA_TITLE : 0);
attributes_mask |= (wmclass_name ? GDK_WA_WMCLASS : 0);
if (gtk_widget_is_toplevel (widget))
{
attributes.window_type = GDK_WINDOW_TOPLEVEL;
gdk_error_trap_push ();
if (priv->socket_window)
gdk_window = gdk_window_new (priv->socket_window,
&attributes, attributes_mask);
else /* If it's a passive plug, we use the root window */
gdk_window = gdk_window_new (gtk_widget_get_root_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, gdk_window);
gdk_display_sync (gtk_widget_get_display (widget));
if (gdk_error_trap_pop ()) /* Uh-oh */
{
gdk_error_trap_push ();
gdk_window_destroy (gdk_window);
gdk_error_trap_pop_ignored ();
gdk_window = gdk_window_new (gtk_widget_get_root_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, gdk_window);
}
gdk_window_add_filter (gdk_window,
gtk_plug_filter_func,
widget);
priv->modality_group = gtk_window_group_new ();
gtk_window_group_add_window (priv->modality_group, window);
xembed_set_info (gtk_widget_get_window (GTK_WIDGET (plug)), 0);
}
else
{
gdk_window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gtk_widget_set_window (widget, gdk_window);
}
gdk_window_set_user_data (gdk_window, window);
gtk_style_context_set_background (gtk_widget_get_style_context (widget),
gdk_window);
gdk_window_enable_synchronized_configure (gdk_window);
}
static void
gtk_plug_show (GtkWidget *widget)
{
if (gtk_widget_is_toplevel (widget))
GTK_WIDGET_CLASS (gtk_plug_parent_class)->show (widget);
else
GTK_WIDGET_CLASS (bin_class)->show (widget);
}
static void
gtk_plug_hide (GtkWidget *widget)
{
if (gtk_widget_is_toplevel (widget))
GTK_WIDGET_CLASS (gtk_plug_parent_class)->hide (widget);
else
GTK_WIDGET_CLASS (bin_class)->hide (widget);
}
/* From gdkinternals.h */
void gdk_synthesize_window_state (GdkWindow *window,
GdkWindowState unset_flags,
GdkWindowState set_flags);
static void
gtk_plug_map (GtkWidget *widget)
{
if (gtk_widget_is_toplevel (widget))
{
GtkBin *bin = GTK_BIN (widget);
GtkPlug *plug = GTK_PLUG (widget);
GtkWidget *child;
gtk_widget_set_mapped (widget, TRUE);
child = gtk_bin_get_child (bin);
if (child != NULL &&
gtk_widget_get_visible (child) &&
!gtk_widget_get_mapped (child))
gtk_widget_map (child);
xembed_set_info (gtk_widget_get_window (GTK_WIDGET (plug)), XEMBED_MAPPED);
gdk_synthesize_window_state (gtk_widget_get_window (widget),
GDK_WINDOW_STATE_WITHDRAWN,
0);
}
else
GTK_WIDGET_CLASS (bin_class)->map (widget);
}
static void
gtk_plug_unmap (GtkWidget *widget)
{
if (gtk_widget_is_toplevel (widget))
{
GtkPlug *plug = GTK_PLUG (widget);
GdkWindow *window;
window = gtk_widget_get_window (widget);
gtk_widget_set_mapped (widget, FALSE);
gdk_window_hide (window);
xembed_set_info (gtk_widget_get_window (GTK_WIDGET (plug)), 0);
gdk_synthesize_window_state (window,
0,
GDK_WINDOW_STATE_WITHDRAWN);
}
else
GTK_WIDGET_CLASS (bin_class)->unmap (widget);
}
static void
gtk_plug_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkWidget *child;
if (gtk_widget_is_toplevel (widget))
GTK_WIDGET_CLASS (gtk_plug_parent_class)->size_allocate (widget, allocation);
else
{
GtkBin *bin = GTK_BIN (widget);
gtk_widget_set_allocation (widget, allocation);
if (gtk_widget_get_realized (widget))
gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
child = gtk_bin_get_child (bin);
if (child != NULL && gtk_widget_get_visible (child))
{
GtkAllocation child_allocation;
child_allocation.x = child_allocation.y = gtk_container_get_border_width (GTK_CONTAINER (widget));
child_allocation.width =
MAX (1, (gint)allocation->width - child_allocation.x * 2);
child_allocation.height =
MAX (1, (gint)allocation->height - child_allocation.y * 2);
gtk_widget_size_allocate (child, &child_allocation);
}
}
}
static gboolean
gtk_plug_key_press_event (GtkWidget *widget,
GdkEventKey *event)
{
if (gtk_widget_is_toplevel (widget))
return GTK_WIDGET_CLASS (gtk_plug_parent_class)->key_press_event (widget, event);
else
return FALSE;
}
static gboolean
gtk_plug_focus_event (GtkWidget *widget,
GdkEventFocus *event)
{
/* We eat focus-in events and focus-out events, since they
* can be generated by something like a keyboard grab on
* a child of the plug.
*/
return FALSE;
}
static void
gtk_plug_set_focus (GtkWindow *window,
GtkWidget *focus)
{
GtkPlug *plug = GTK_PLUG (window);
GtkPlugPrivate *priv = plug->priv;
GTK_WINDOW_CLASS (gtk_plug_parent_class)->set_focus (window, focus);
/* Ask for focus from embedder
*/
if (focus && !gtk_window_has_toplevel_focus (window))
_gtk_xembed_send_message (priv->socket_window,
XEMBED_REQUEST_FOCUS, 0, 0, 0);
}
static guint
grabbed_key_hash (gconstpointer a)
{
const GrabbedKey *key = a;
guint h;
h = key->accelerator_key << 16;
h ^= key->accelerator_key >> 16;
h ^= key->accelerator_mods;
return h;
}
static gboolean
grabbed_key_equal (gconstpointer a, gconstpointer b)
{
const GrabbedKey *keya = a;
const GrabbedKey *keyb = b;
return (keya->accelerator_key == keyb->accelerator_key &&
keya->accelerator_mods == keyb->accelerator_mods);
}
static void
add_grabbed_key (gpointer key, gpointer val, gpointer data)
{
GrabbedKey *grabbed_key = key;
GtkPlug *plug = data;
GtkPlugPrivate *priv = plug->priv;
if (!priv->grabbed_keys ||
!g_hash_table_lookup (priv->grabbed_keys, grabbed_key))
{
_gtk_xembed_send_message (priv->socket_window, XEMBED_GTK_GRAB_KEY, 0,
grabbed_key->accelerator_key,
grabbed_key->accelerator_mods);
}
}
static void
remove_grabbed_key (gpointer key, gpointer val, gpointer data)
{
GrabbedKey *grabbed_key = key;
GtkPlug *plug = data;
GtkPlugPrivate *priv = plug->priv;
if (!priv->grabbed_keys ||
!g_hash_table_lookup (priv->grabbed_keys, grabbed_key))
{
_gtk_xembed_send_message (priv->socket_window, XEMBED_GTK_UNGRAB_KEY, 0,
grabbed_key->accelerator_key,
grabbed_key->accelerator_mods);
}
}
static void
keys_foreach (GtkWindow *window,
guint keyval,
GdkModifierType modifiers,
gboolean is_mnemonic,
gpointer data)
{
GHashTable *new_grabbed_keys = data;
GrabbedKey *key = g_slice_new (GrabbedKey);
key->accelerator_key = keyval;
key->accelerator_mods = modifiers;
g_hash_table_replace (new_grabbed_keys, key, key);
}
static void
grabbed_key_free (gpointer data)
{
g_slice_free (GrabbedKey, data);
}
static void
gtk_plug_keys_changed (GtkWindow *window)
{
GHashTable *new_grabbed_keys, *old_grabbed_keys;
GtkPlug *plug = GTK_PLUG (window);
GtkPlugPrivate *priv = plug->priv;
new_grabbed_keys = g_hash_table_new_full (grabbed_key_hash, grabbed_key_equal, (GDestroyNotify)grabbed_key_free, NULL);
_gtk_window_keys_foreach (window, keys_foreach, new_grabbed_keys);
if (priv->socket_window)
g_hash_table_foreach (new_grabbed_keys, add_grabbed_key, plug);
old_grabbed_keys = priv->grabbed_keys;
priv->grabbed_keys = new_grabbed_keys;
if (old_grabbed_keys)
{
if (priv->socket_window)
g_hash_table_foreach (old_grabbed_keys, remove_grabbed_key, plug);
g_hash_table_destroy (old_grabbed_keys);
}
}
static void
gtk_plug_focus_to_parent (GtkPlug *plug,
GtkDirectionType direction)
{
GtkPlugPrivate *priv = plug->priv;
XEmbedMessageType message;
switch (direction)
{
case GTK_DIR_UP:
case GTK_DIR_LEFT:
case GTK_DIR_TAB_BACKWARD:
message = XEMBED_FOCUS_PREV;
break;
case GTK_DIR_DOWN:
case GTK_DIR_RIGHT:
case GTK_DIR_TAB_FORWARD:
message = XEMBED_FOCUS_NEXT;
break;
default:
g_assert_not_reached ();
message = XEMBED_FOCUS_PREV;
break;
}
_gtk_xembed_send_focus_message (priv->socket_window, message, 0);
}
static gboolean
gtk_plug_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkBin *bin = GTK_BIN (widget);
GtkPlug *plug = GTK_PLUG (widget);
GtkWindow *window = GTK_WINDOW (widget);
GtkContainer *container = GTK_CONTAINER (widget);
GtkWidget *child;
GtkWidget *old_focus_child;
GtkWidget *parent;
old_focus_child = gtk_container_get_focus_child (container);
/* We override GtkWindow's behavior, since we don't want wrapping here.
*/
if (old_focus_child)
{
GtkWidget *focus_widget;
if (gtk_widget_child_focus (old_focus_child, direction))
return TRUE;
focus_widget = gtk_window_get_focus (window);
if (focus_widget)
{
/* Wrapped off the end, clear the focus setting for the toplevel */
parent = gtk_widget_get_parent (focus_widget);
while (parent)
{
gtk_container_set_focus_child (GTK_CONTAINER (parent), NULL);
parent = gtk_widget_get_parent (parent);
}
gtk_window_set_focus (GTK_WINDOW (container), NULL);
}
}
else
{
/* Try to focus the first widget in the window */
child = gtk_bin_get_child (bin);
if (child && gtk_widget_child_focus (child, direction))
return TRUE;
}
if (!gtk_container_get_focus_child (GTK_CONTAINER (window)))
gtk_plug_focus_to_parent (plug, direction);
return FALSE;
}
static void
gtk_plug_check_resize (GtkContainer *container)
{
if (gtk_widget_is_toplevel (GTK_WIDGET (container)))
GTK_CONTAINER_CLASS (gtk_plug_parent_class)->check_resize (container);
else
GTK_CONTAINER_CLASS (bin_class)->check_resize (container);
}
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