gtk2/gtk/gtksocket.c

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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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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 */
#include "gdk/gdkx.h"
#include "gdk/gdkkeysyms.h"
#include "gtkwindow.h"
#include "gtksignal.h"
#include "gtksocket.h"
#include "gtkdnd.h"
/* Forward declararations */
static void gtk_socket_class_init (GtkSocketClass *klass);
static void gtk_socket_init (GtkSocket *socket);
static void gtk_socket_realize (GtkWidget *widget);
static void gtk_socket_unrealize (GtkWidget *widget);
static void gtk_socket_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_socket_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_socket_focus_in_event (GtkWidget *widget,
GdkEventFocus *event);
static void gtk_socket_claim_focus (GtkSocket *socket);
static gint gtk_socket_focus_out_event (GtkWidget *widget,
GdkEventFocus *event);
static void gtk_socket_send_configure_event (GtkSocket *socket);
static gint gtk_socket_focus (GtkContainer *container,
GtkDirectionType direction);
static GdkFilterReturn gtk_socket_filter_func (GdkXEvent *gdk_xevent,
GdkEvent *event,
gpointer data);
#ifdef DEBUG_PLUGSOCKET
#define DPRINTF(arg) g_print arg
#else
#define DPRINTF(arg)
#endif
/* From Tk */
#define EMBEDDED_APP_WANTS_FOCUS NotifyNormal+20
/* Local data */
static GtkWidgetClass *parent_class = NULL;
guint
gtk_socket_get_type ()
{
static guint socket_type = 0;
if (!socket_type)
{
static const GtkTypeInfo socket_info =
{
"GtkSocket",
sizeof (GtkSocket),
sizeof (GtkSocketClass),
(GtkClassInitFunc) gtk_socket_class_init,
(GtkObjectInitFunc) gtk_socket_init,
(GtkArgSetFunc) NULL,
(GtkArgGetFunc) NULL
};
socket_type = gtk_type_unique (gtk_container_get_type (), &socket_info);
}
return socket_type;
}
static void
gtk_socket_class_init (GtkSocketClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
parent_class = gtk_type_class (gtk_widget_get_type ());
widget_class->realize = gtk_socket_realize;
widget_class->unrealize = gtk_socket_unrealize;
widget_class->size_request = gtk_socket_size_request;
widget_class->size_allocate = gtk_socket_size_allocate;
widget_class->focus_in_event = gtk_socket_focus_in_event;
widget_class->focus_out_event = gtk_socket_focus_out_event;
container_class->focus = gtk_socket_focus;
}
static void
gtk_socket_init (GtkSocket *socket)
{
socket->request_width = 0;
socket->request_height = 0;
socket->current_width = 0;
socket->current_height = 0;
socket->plug_window = NULL;
socket->same_app = FALSE;
socket->focus_in = FALSE;
socket->have_size = FALSE;
socket->need_map = FALSE;
}
GtkWidget*
gtk_socket_new ()
{
GtkSocket *socket;
socket = gtk_type_new (gtk_socket_get_type ());
return GTK_WIDGET (socket);
}
void
gtk_socket_steal (GtkSocket *socket, guint32 id)
{
GtkWidget *widget;
widget = GTK_WIDGET (socket);
socket->plug_window = gdk_window_lookup (id);
if (socket->plug_window && socket->plug_window->user_data)
{
/*
GtkWidget *child_widget;
child_widget = GTK_WIDGET (socket->plug_window->user_data);
*/
g_warning("Stealing from same app not yet implemented");
socket->same_app = TRUE;
}
else
{
socket->plug_window = gdk_window_foreign_new (id);
socket->same_app = FALSE;
socket->have_size = FALSE;
XSelectInput (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW(socket->plug_window),
StructureNotifyMask | PropertyChangeMask);
gtk_widget_queue_resize (widget);
}
gdk_window_hide (socket->plug_window);
gdk_window_reparent (socket->plug_window, widget->window, 0, 0);
socket->need_map = TRUE;
}
static void
gtk_socket_realize (GtkWidget *widget)
{
GtkSocket *socket;
GdkWindowAttr attributes;
gint attributes_mask;
XWindowAttributes xattrs;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SOCKET (widget));
socket = GTK_SOCKET (widget);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.event_mask = GDK_FOCUS_CHANGE_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (widget->window, socket);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
XGetWindowAttributes (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW (widget->window),
&xattrs);
XSelectInput (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW(widget->window),
xattrs.your_event_mask |
SubstructureNotifyMask | SubstructureRedirectMask);
gdk_window_add_filter (widget->window, gtk_socket_filter_func, widget);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
/* We sync here so that we make sure that if the XID for
* our window is passed to another application, SubstructureRedirectMask
* will be set by the time the other app creates its window.
*/
gdk_flush();
}
static void
gtk_socket_unrealize (GtkWidget *widget)
{
GtkSocket *socket;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SOCKET (widget));
socket = GTK_SOCKET (widget);
if (socket->plug_window)
{
GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (socket));
if (toplevel && GTK_IS_WINDOW (toplevel))
gtk_window_remove_embedded_xid (GTK_WINDOW (toplevel),
GDK_WINDOW_XWINDOW (socket->plug_window));
}
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_socket_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkSocket *socket;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SOCKET (widget));
g_return_if_fail (requisition != NULL);
socket = GTK_SOCKET (widget);
if (!socket->have_size && socket->plug_window)
{
XSizeHints hints;
long supplied;
if (XGetWMNormalHints (GDK_DISPLAY(),
GDK_WINDOW_XWINDOW (socket->plug_window),
&hints, &supplied))
{
/* This is obsolete, according the X docs, but many programs
* still use it */
if (hints.flags & (PSize | USSize))
{
socket->request_width = hints.width;
socket->request_height = hints.height;
}
else if (hints.flags & PMinSize)
{
socket->request_width = hints.min_width;
socket->request_height = hints.min_height;
}
else if (hints.flags & PBaseSize)
{
socket->request_width = hints.base_width;
socket->request_height = hints.base_height;
}
}
socket->have_size = TRUE; /* don't check again? */
}
requisition->width = socket->request_width;
requisition->height = socket->request_height;
}
static void
gtk_socket_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkSocket *socket;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SOCKET (widget));
g_return_if_fail (allocation != NULL);
socket = GTK_SOCKET (widget);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
if (socket->plug_window)
{
if (!socket->need_map &&
(allocation->width == socket->current_width) &&
(allocation->height == socket->current_height))
{
gtk_socket_send_configure_event (socket);
DPRINTF(( "No change: %d %d\n",
allocation->width, allocation->height));
}
else
{
gdk_window_move_resize (socket->plug_window,
0, 0,
allocation->width, allocation->height);
DPRINTF(("configuring: %d %d\n",
allocation->width, allocation->height));
socket->current_width = allocation->width;
socket->current_height = allocation->height;
}
if (socket->need_map)
{
gdk_window_show (socket->plug_window);
socket->need_map = FALSE;
}
}
}
}
static gint
gtk_socket_focus_in_event (GtkWidget *widget, GdkEventFocus *event)
{
GtkSocket *socket;
g_return_val_if_fail (GTK_IS_SOCKET (widget), FALSE);
socket = GTK_SOCKET (widget);
DPRINTF (( "Got focus\n"));
if (socket->focus_in && socket->plug_window)
XSetInputFocus (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW (socket->plug_window),
RevertToParent, GDK_CURRENT_TIME);
return TRUE;
}
static gint
gtk_socket_focus_out_event (GtkWidget *widget, GdkEventFocus *event)
{
GtkWidget *toplevel;
GtkSocket *socket;
g_return_val_if_fail (GTK_IS_SOCKET (widget), FALSE);
socket = GTK_SOCKET (widget);
toplevel = gtk_widget_get_ancestor (widget, gtk_window_get_type());
if (toplevel)
{
XSetInputFocus (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW (toplevel->window),
RevertToParent, CurrentTime); /* FIXME? */
}
socket->focus_in = FALSE;
return TRUE;
}
static void
gtk_socket_claim_focus (GtkSocket *socket)
{
socket->focus_in = TRUE;
/* Oh, the trickery... */
GTK_WIDGET_SET_FLAGS (socket, GTK_CAN_FOCUS);
gtk_widget_grab_focus (GTK_WIDGET (socket));
GTK_WIDGET_UNSET_FLAGS (socket, GTK_CAN_FOCUS);
/* FIXME: we might grab the focus even if we don't have
* it as an app... (and see _focus_in ()) */
if (socket->plug_window)
XSetInputFocus (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW (socket->plug_window),
RevertToParent, GDK_CURRENT_TIME);
}
static gint
gtk_socket_focus (GtkContainer *container, GtkDirectionType direction)
{
GtkSocket *socket;
g_return_val_if_fail (GTK_IS_SOCKET (container), FALSE);
socket = GTK_SOCKET (container);
if (!socket->focus_in && socket->plug_window)
{
XEvent xevent;
gtk_socket_claim_focus (socket);
xevent.xkey.type = KeyPress;
xevent.xkey.display = GDK_DISPLAY ();
xevent.xkey.window = GDK_WINDOW_XWINDOW (socket->plug_window);
xevent.xkey.root = GDK_ROOT_WINDOW (); /* FIXME */
xevent.xkey.time = GDK_CURRENT_TIME; /* FIXME */
/* FIXME, the following might cause big problems for
* non-GTK apps */
xevent.xkey.x = 0;
xevent.xkey.y = 0;
xevent.xkey.x_root = 0;
xevent.xkey.y_root = 0;
xevent.xkey.state = 0;
xevent.xkey.same_screen = TRUE; /* FIXME ? */
switch (direction)
{
case GTK_DIR_UP:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Up);
break;
case GTK_DIR_DOWN:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Down);
break;
case GTK_DIR_LEFT:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Left);
break;
case GTK_DIR_RIGHT:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Right);
break;
case GTK_DIR_TAB_FORWARD:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Tab);
break;
case GTK_DIR_TAB_BACKWARD:
xevent.xkey.keycode = XKeysymToKeycode(GDK_DISPLAY(), GDK_Tab);
xevent.xkey.state = ShiftMask;
break;
}
XSendEvent (gdk_display,
GDK_WINDOW_XWINDOW (socket->plug_window),
False, NoEventMask, &xevent);
return TRUE;
}
else
{
return FALSE;
}
}
static void
gtk_socket_send_configure_event (GtkSocket *socket)
{
XEvent event;
g_return_if_fail (socket->plug_window != NULL);
event.xconfigure.type = ConfigureNotify;
event.xconfigure.display = gdk_display;
event.xconfigure.event = GDK_WINDOW_XWINDOW (socket->plug_window);
event.xconfigure.window = GDK_WINDOW_XWINDOW (socket->plug_window);
event.xconfigure.x = 0;
event.xconfigure.y = 0;
event.xconfigure.width = GTK_WIDGET(socket)->allocation.width;
event.xconfigure.height = GTK_WIDGET(socket)->allocation.height;
event.xconfigure.border_width = 0;
event.xconfigure.above = None;
event.xconfigure.override_redirect = False;
XSendEvent (gdk_display,
GDK_WINDOW_XWINDOW (socket->plug_window),
False, NoEventMask, &event);
}
static void
gtk_socket_add_window (GtkSocket *socket, guint32 xid)
{
socket->plug_window = gdk_window_lookup (xid);
socket->same_app = TRUE;
if (!socket->plug_window)
{
GtkWidget *toplevel;
GdkDragProtocol protocol;
socket->plug_window = gdk_window_foreign_new (xid);
socket->same_app = FALSE;
XSelectInput (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW(socket->plug_window),
StructureNotifyMask | PropertyChangeMask);
if (gdk_drag_get_protocol (xid, &protocol))
gtk_drag_dest_set_proxy (GTK_WIDGET (socket), socket->plug_window,
protocol, TRUE);
gdk_window_add_filter (socket->plug_window,
gtk_socket_filter_func, socket);
/* Add a pointer to the socket on our toplevel window */
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (socket));
if (toplevel && GTK_IS_WINDOW (toplevel))
{
gtk_window_add_embedded_xid (GTK_WINDOW (toplevel), xid);
}
}
}
static GdkFilterReturn
gtk_socket_filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data)
{
GtkSocket *socket;
GtkWidget *widget;
XEvent *xevent;
GdkFilterReturn return_val;
socket = GTK_SOCKET (data);
widget = GTK_WIDGET (socket);
xevent = (XEvent *)gdk_xevent;
return_val = GDK_FILTER_CONTINUE;
switch (xevent->type)
{
case CreateNotify:
{
XCreateWindowEvent *xcwe = &xevent->xcreatewindow;
if (!socket->plug_window)
{
g_print("Here!\n");
gtk_socket_add_window (socket, xcwe->window);
gdk_window_move_resize(socket->plug_window,
0, 0,
widget->allocation.width,
widget->allocation.height);
socket->request_width = xcwe->width;
socket->request_height = xcwe->height;
socket->have_size = TRUE;
DPRINTF(("Window created with size: %d %d\n",
socket->request_width,
socket->request_height));
gtk_widget_queue_resize (widget);
}
return_val = GDK_FILTER_REMOVE;
break;
}
case ConfigureRequest:
{
XConfigureRequestEvent *xcre = &xevent->xconfigurerequest;
if (!socket->plug_window)
gtk_socket_add_window (socket, xcre->window);
if (xcre->window == GDK_WINDOW_XWINDOW (socket->plug_window))
{
if (xcre->value_mask & (CWWidth | CWHeight))
{
socket->request_width = xcre->width;
socket->request_height = xcre->height;
socket->have_size = TRUE;
DPRINTF(("Configure request: %d %d\n",
socket->request_width,
socket->request_height));
gtk_widget_queue_resize (widget);
}
else if (xcre->value_mask & (CWX | CWY))
{
gtk_socket_send_configure_event (socket);
}
/* Ignore stacking requests. */
return_val = GDK_FILTER_REMOVE;
}
break;
}
case DestroyNotify:
{
XDestroyWindowEvent *xdwe = &xevent->xdestroywindow;
if (socket->plug_window &&
(xdwe->window == GDK_WINDOW_XWINDOW (socket->plug_window)))
{
GtkWidget *toplevel;
DPRINTF(("Destroy Notify\n"));
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (socket));
if (toplevel && GTK_IS_WINDOW (toplevel))
gtk_window_remove_embedded_xid (GTK_WINDOW (toplevel), xdwe->window);
gtk_widget_destroy (widget);
gdk_window_destroy_notify (socket->plug_window);
socket->plug_window = NULL;
return_val = GDK_FILTER_REMOVE;
}
break;
}
case FocusIn:
if (xevent->xfocus.mode == EMBEDDED_APP_WANTS_FOCUS)
{
gtk_socket_claim_focus (socket);
}
else if (xevent->xfocus.detail == NotifyInferior)
{
#if 0
GtkWidget *toplevel;
toplevel = gtk_widget_get_ancestor (widget, gtk_window_get_type());
if (toplevel)
{
XSetInputFocus (GDK_DISPLAY (),
GDK_WINDOW_XWINDOW (toplevel->window),
RevertToParent, CurrentTime); /* FIXME? */
}
#endif
}
return_val = GDK_FILTER_REMOVE;
break;
case FocusOut:
return_val = GDK_FILTER_REMOVE;
break;
case MapRequest:
if (!socket->plug_window)
gtk_socket_add_window (socket, xevent->xmaprequest.window);
if (xevent->xmaprequest.window ==
GDK_WINDOW_XWINDOW (socket->plug_window))
{
DPRINTF(("Map Request\n"));
gdk_window_show (socket->plug_window);
return_val = GDK_FILTER_REMOVE;
}
break;
case PropertyNotify:
if (xevent->xproperty.window ==
GDK_WINDOW_XWINDOW (socket->plug_window))
{
GdkDragProtocol protocol;
if ((xevent->xproperty.atom == gdk_atom_intern ("XdndAware", FALSE)) ||
(xevent->xproperty.atom == gdk_atom_intern ("_MOTIF_DRAG_RECEIVER_INFO", FALSE)))
{
if (gdk_drag_get_protocol (xevent->xproperty.window, &protocol))
gtk_drag_dest_set_proxy (GTK_WIDGET (socket),
socket->plug_window,
protocol, TRUE);
}
return_val = GDK_FILTER_REMOVE;
}
}
return return_val;
}