mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 21:51:08 +00:00
320 lines
8.2 KiB
C
320 lines
8.2 KiB
C
/* GDK - The GIMP Drawing Kit
|
|
* 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "gdk.h" /* For gdk_rectangle_intersect */
|
|
#include "gdkprivate-x11.h"
|
|
#include "gdkx.h"
|
|
#include "gdkinternals.h"
|
|
#include "gdkscreen-x11.h"
|
|
#include "gdkdisplay-x11.h"
|
|
#include "gdkwindow-x11.h"
|
|
|
|
|
|
typedef struct _GdkWindowQueueItem GdkWindowQueueItem;
|
|
typedef struct _GdkWindowParentPos GdkWindowParentPos;
|
|
|
|
typedef enum {
|
|
GDK_WINDOW_QUEUE_TRANSLATE,
|
|
GDK_WINDOW_QUEUE_ANTIEXPOSE
|
|
} GdkWindowQueueType;
|
|
|
|
struct _GdkWindowQueueItem
|
|
{
|
|
GdkWindow *window;
|
|
gulong serial;
|
|
GdkWindowQueueType type;
|
|
union {
|
|
struct {
|
|
cairo_region_t *area;
|
|
gint dx;
|
|
gint dy;
|
|
} translate;
|
|
struct {
|
|
cairo_region_t *area;
|
|
} antiexpose;
|
|
} u;
|
|
};
|
|
|
|
void
|
|
_gdk_window_move_resize_child (GdkWindow *window,
|
|
gint x,
|
|
gint y,
|
|
gint width,
|
|
gint height)
|
|
{
|
|
GdkWindowObject *obj;
|
|
|
|
g_return_if_fail (window != NULL);
|
|
g_return_if_fail (GDK_IS_WINDOW (window));
|
|
|
|
obj = GDK_WINDOW_OBJECT (window);
|
|
|
|
if (width > 65535 ||
|
|
height > 65535)
|
|
{
|
|
g_warning ("Native children wider or taller than 65535 pixels are not supported");
|
|
|
|
if (width > 65535)
|
|
width = 65535;
|
|
if (height > 65535)
|
|
height = 65535;
|
|
}
|
|
|
|
obj->x = x;
|
|
obj->y = y;
|
|
obj->width = width;
|
|
obj->height = height;
|
|
|
|
/* We don't really care about origin overflow, because on overflow
|
|
the window won't be visible anyway and thus it will be shaped
|
|
to nothing */
|
|
|
|
_gdk_x11_window_tmp_unset_parent_bg (window);
|
|
_gdk_x11_window_tmp_unset_bg (window, TRUE);
|
|
XMoveResizeWindow (GDK_WINDOW_XDISPLAY (window),
|
|
GDK_WINDOW_XID (window),
|
|
obj->x + obj->parent->abs_x,
|
|
obj->y + obj->parent->abs_y,
|
|
width, height);
|
|
_gdk_x11_window_tmp_reset_parent_bg (window);
|
|
_gdk_x11_window_tmp_reset_bg (window, TRUE);
|
|
}
|
|
|
|
static Bool
|
|
expose_serial_predicate (Display *xdisplay,
|
|
XEvent *xev,
|
|
XPointer arg)
|
|
{
|
|
gulong *serial = (gulong *)arg;
|
|
|
|
if (xev->xany.type == Expose || xev->xany.type == GraphicsExpose)
|
|
*serial = MIN (*serial, xev->xany.serial);
|
|
|
|
return False;
|
|
}
|
|
|
|
/* Find oldest possible serial for an outstanding expose event
|
|
*/
|
|
static gulong
|
|
find_current_serial (Display *xdisplay)
|
|
{
|
|
XEvent xev;
|
|
gulong serial = NextRequest (xdisplay);
|
|
|
|
XSync (xdisplay, False);
|
|
|
|
XCheckIfEvent (xdisplay, &xev, expose_serial_predicate, (XPointer)&serial);
|
|
|
|
return serial;
|
|
}
|
|
|
|
static void
|
|
queue_delete_link (GQueue *queue,
|
|
GList *link)
|
|
{
|
|
if (queue->tail == link)
|
|
queue->tail = link->prev;
|
|
|
|
queue->head = g_list_remove_link (queue->head, link);
|
|
g_list_free_1 (link);
|
|
queue->length--;
|
|
}
|
|
|
|
static void
|
|
queue_item_free (GdkWindowQueueItem *item)
|
|
{
|
|
if (item->window)
|
|
{
|
|
g_object_remove_weak_pointer (G_OBJECT (item->window),
|
|
(gpointer *)&(item->window));
|
|
}
|
|
|
|
if (item->type == GDK_WINDOW_QUEUE_ANTIEXPOSE)
|
|
cairo_region_destroy (item->u.antiexpose.area);
|
|
else
|
|
{
|
|
if (item->u.translate.area)
|
|
cairo_region_destroy (item->u.translate.area);
|
|
}
|
|
|
|
g_free (item);
|
|
}
|
|
|
|
static void
|
|
gdk_window_queue (GdkWindow *window,
|
|
GdkWindowQueueItem *item)
|
|
{
|
|
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_WINDOW_DISPLAY (window));
|
|
|
|
if (!display_x11->translate_queue)
|
|
display_x11->translate_queue = g_queue_new ();
|
|
|
|
/* Keep length of queue finite by, if it grows too long,
|
|
* figuring out the latest relevant serial and discarding
|
|
* irrelevant queue items.
|
|
*/
|
|
if (display_x11->translate_queue->length >= 64)
|
|
{
|
|
gulong serial = find_current_serial (GDK_WINDOW_XDISPLAY (window));
|
|
GList *tmp_list = display_x11->translate_queue->head;
|
|
|
|
while (tmp_list)
|
|
{
|
|
GdkWindowQueueItem *item = tmp_list->data;
|
|
GList *next = tmp_list->next;
|
|
|
|
/* an overflow-safe (item->serial < serial) */
|
|
if (item->serial - serial > (gulong) G_MAXLONG)
|
|
{
|
|
queue_delete_link (display_x11->translate_queue, tmp_list);
|
|
queue_item_free (item);
|
|
}
|
|
|
|
tmp_list = next;
|
|
}
|
|
}
|
|
|
|
/* Catch the case where someone isn't processing events and there
|
|
* is an event stuck in the event queue with an old serial:
|
|
* If we can't reduce the queue length by the above method,
|
|
* discard anti-expose items. (We can't discard translate
|
|
* items
|
|
*/
|
|
if (display_x11->translate_queue->length >= 64)
|
|
{
|
|
GList *tmp_list = display_x11->translate_queue->head;
|
|
|
|
while (tmp_list)
|
|
{
|
|
GdkWindowQueueItem *item = tmp_list->data;
|
|
GList *next = tmp_list->next;
|
|
|
|
if (item->type == GDK_WINDOW_QUEUE_ANTIEXPOSE)
|
|
{
|
|
queue_delete_link (display_x11->translate_queue, tmp_list);
|
|
queue_item_free (item);
|
|
}
|
|
|
|
tmp_list = next;
|
|
}
|
|
}
|
|
|
|
item->window = window;
|
|
item->serial = NextRequest (GDK_WINDOW_XDISPLAY (window));
|
|
|
|
g_object_add_weak_pointer (G_OBJECT (window),
|
|
(gpointer *)&(item->window));
|
|
|
|
g_queue_push_tail (display_x11->translate_queue, item);
|
|
}
|
|
|
|
void
|
|
_gdk_x11_window_queue_translation (GdkWindow *window,
|
|
GdkGC *gc,
|
|
cairo_region_t *area,
|
|
gint dx,
|
|
gint dy)
|
|
{
|
|
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
|
|
item->type = GDK_WINDOW_QUEUE_TRANSLATE;
|
|
item->u.translate.area = area ? cairo_region_copy (area) : NULL;
|
|
item->u.translate.dx = dx;
|
|
item->u.translate.dy = dy;
|
|
|
|
/* Ensure that the gc is flushed so that we get the right
|
|
serial from NextRequest in gdk_window_queue, i.e. the
|
|
the serial for the XCopyArea, not the ones from flushing
|
|
the gc. */
|
|
_gdk_x11_gc_flush (gc);
|
|
gdk_window_queue (window, item);
|
|
}
|
|
|
|
gboolean
|
|
_gdk_x11_window_queue_antiexpose (GdkWindow *window,
|
|
cairo_region_t *area)
|
|
{
|
|
GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
|
|
item->type = GDK_WINDOW_QUEUE_ANTIEXPOSE;
|
|
item->u.antiexpose.area = area;
|
|
|
|
gdk_window_queue (window, item);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
_gdk_window_process_expose (GdkWindow *window,
|
|
gulong serial,
|
|
GdkRectangle *area)
|
|
{
|
|
cairo_region_t *invalidate_region = cairo_region_create_rectangle (area);
|
|
GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_WINDOW_DISPLAY (window));
|
|
|
|
if (display_x11->translate_queue)
|
|
{
|
|
GList *tmp_list = display_x11->translate_queue->head;
|
|
|
|
while (tmp_list)
|
|
{
|
|
GdkWindowQueueItem *item = tmp_list->data;
|
|
GList *next = tmp_list->next;
|
|
|
|
/* an overflow-safe (serial < item->serial) */
|
|
if (serial - item->serial > (gulong) G_MAXLONG)
|
|
{
|
|
if (item->window == window)
|
|
{
|
|
if (item->type == GDK_WINDOW_QUEUE_TRANSLATE)
|
|
{
|
|
if (item->u.translate.area)
|
|
{
|
|
cairo_region_t *intersection;
|
|
|
|
intersection = cairo_region_copy (invalidate_region);
|
|
cairo_region_intersect (intersection, item->u.translate.area);
|
|
cairo_region_subtract (invalidate_region, intersection);
|
|
cairo_region_translate (intersection, item->u.translate.dx, item->u.translate.dy);
|
|
cairo_region_union (invalidate_region, intersection);
|
|
cairo_region_destroy (intersection);
|
|
}
|
|
else
|
|
cairo_region_translate (invalidate_region, item->u.translate.dx, item->u.translate.dy);
|
|
}
|
|
else /* anti-expose */
|
|
{
|
|
cairo_region_subtract (invalidate_region, item->u.antiexpose.area);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
queue_delete_link (display_x11->translate_queue, tmp_list);
|
|
queue_item_free (item);
|
|
}
|
|
tmp_list = next;
|
|
}
|
|
}
|
|
|
|
if (!cairo_region_is_empty (invalidate_region))
|
|
_gdk_window_invalidate_for_expose (window, invalidate_region);
|
|
|
|
cairo_region_destroy (invalidate_region);
|
|
}
|