gdkgeometry-x11.c

linux下电话本所依赖的一些图形库

  parent = (GdkWindowObject *)wrapper->parent;
  while (parent && parent->window_type == GDK_WINDOW_CHILD)
    {
      GdkWindowImplX11 *impl = GDK_WINDOW_IMPL_X11 (parent->impl);
      
      tmp_clip.x = - clip_xoffset;
      tmp_clip.y = - clip_yoffset;
      tmp_clip.width = impl->width;
      tmp_clip.height = impl->height;

      gdk_rectangle_intersect (&parent_pos->clip_rect, &tmp_clip, &parent_pos->clip_rect);

      parent_pos->x += parent->x;
      parent_pos->y += parent->y;
      parent_pos->x11_x += impl->position_info.x;
      parent_pos->x11_y += impl->position_info.y;

      clip_xoffset += parent->x;
      clip_yoffset += parent->y;

      parent = (GdkWindowObject *)parent->parent;
    }
}

static void
gdk_window_premove (GdkWindow          *window,
		    GdkWindowParentPos *parent_pos)
{
  GdkWindowImplX11 *impl;
  GdkWindowObject *obj;
  GdkXPositionInfo new_info;
  GList *tmp_list;
  gint d_xoffset, d_yoffset;
  GdkWindowParentPos this_pos;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_X11 (obj->impl);
  
  gdk_window_compute_position (impl, parent_pos, &new_info);

  gdk_window_clip_changed (window, &impl->position_info.clip_rect, &new_info.clip_rect);

  this_pos.x = parent_pos->x + obj->x;
  this_pos.y = parent_pos->y + obj->y;
  this_pos.x11_x = parent_pos->x11_x + new_info.x;
  this_pos.x11_y = parent_pos->x11_y + new_info.y;
  this_pos.clip_rect = new_info.clip_rect;

  if (impl->position_info.mapped && !new_info.mapped)
    XUnmapWindow (GDK_DRAWABLE_XDISPLAY (window), GDK_DRAWABLE_XID (window));

  d_xoffset = new_info.x_offset - impl->position_info.x_offset;
  d_yoffset = new_info.y_offset - impl->position_info.y_offset;
  
  if (d_xoffset != 0 || d_yoffset != 0)
    {
      GdkRectangle new_position;

      if (d_xoffset < 0 || d_yoffset < 0)
	gdk_window_queue_translation (window, MIN (d_xoffset, 0), MIN (d_yoffset, 0));

      compute_intermediate_position (&impl->position_info, &new_info, d_xoffset, d_yoffset,
				     &new_position);

      XMoveResizeWindow (GDK_DRAWABLE_XDISPLAY (window),
			 GDK_DRAWABLE_XID (window),
			 new_position.x, new_position.y, new_position.width, new_position.height);
    }

  tmp_list = obj->children;
  while (tmp_list)
    {
      gdk_window_premove (tmp_list->data, &this_pos);
      tmp_list = tmp_list->next;
    }
}

static void
gdk_window_postmove (GdkWindow          *window,
		     GdkWindowParentPos *parent_pos)
{
  GdkWindowImplX11 *impl;
  GdkWindowObject *obj;
  GdkXPositionInfo new_info;
  GList *tmp_list;
  gint d_xoffset, d_yoffset;
  GdkWindowParentPos this_pos;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_X11 (obj->impl);
  
  gdk_window_compute_position (impl, parent_pos, &new_info);

  this_pos.x = parent_pos->x + obj->x;
  this_pos.y = parent_pos->y + obj->y;
  this_pos.x11_x = parent_pos->x11_x + new_info.x;
  this_pos.x11_y = parent_pos->x11_y + new_info.y;
  this_pos.clip_rect = new_info.clip_rect;

  d_xoffset = new_info.x_offset - impl->position_info.x_offset;
  d_yoffset = new_info.y_offset - impl->position_info.y_offset;
  
  if (d_xoffset != 0 || d_yoffset != 0)
    {
      if (d_xoffset > 0 || d_yoffset > 0)
	gdk_window_queue_translation (window, MAX (d_xoffset, 0), MAX (d_yoffset, 0));
	
      XMoveResizeWindow (GDK_DRAWABLE_XDISPLAY (window),
			 GDK_DRAWABLE_XID (window),
			 new_info.x, new_info.y, new_info.width, new_info.height);
    }

  if (!impl->position_info.mapped && new_info.mapped && GDK_WINDOW_IS_MAPPED (obj))
    XMapWindow (GDK_DRAWABLE_XDISPLAY (window), GDK_DRAWABLE_XID (window));

  if (impl->position_info.no_bg)
    _gdk_x11_window_tmp_reset_bg (window, FALSE);

  impl->position_info = new_info;

  tmp_list = obj->children;
  while (tmp_list)
    {
      gdk_window_postmove (tmp_list->data, &this_pos);
      tmp_list = tmp_list->next;
    }
}

static Bool
expose_serial_predicate (Display *xdisplay,
			 XEvent  *xev,
			 XPointer arg)
{
  gulong *serial = (gulong *)arg;

  if (xev->xany.type == Expose)
    *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)
    gdk_region_destroy (item->u.antiexpose.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;
	  
	  if (serial > item->serial)
	    {
	      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);
}

static void
gdk_window_queue_translation (GdkWindow *window,
			      gint       dx,
			      gint       dy)
{
  GdkWindowQueueItem *item = g_new (GdkWindowQueueItem, 1);
  item->type = GDK_WINDOW_QUEUE_TRANSLATE;
  item->u.translate.dx = dx;
  item->u.translate.dy = dy;

  gdk_window_queue (window, item);
}

gboolean
_gdk_windowing_window_queue_antiexpose (GdkWindow *window,
					GdkRegion *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)
{
  GdkWindowImplX11 *impl;
  GdkRegion *invalidate_region = gdk_region_rectangle (area);
  GdkRegion *clip_region;
  GdkDisplayX11 *display_x11 = GDK_DISPLAY_X11 (GDK_WINDOW_DISPLAY (window));
  impl = GDK_WINDOW_IMPL_X11 (GDK_WINDOW_OBJECT (window)->impl);
      
  if (display_x11->translate_queue)
    {
      GList *tmp_list = display_x11->translate_queue->head;
      
      while (tmp_list)
	{
	  GdkWindowQueueItem *item = tmp_list->data;
	  tmp_list = tmp_list->next;
	  
	  if (serial < item->serial)
	    {
	      if (item->window == window)
		{
		  if (item->type == GDK_WINDOW_QUEUE_TRANSLATE)
		    gdk_region_offset (invalidate_region, item->u.translate.dx, item->u.translate.dy);
		  else		/* anti-expose */
		    gdk_region_subtract (invalidate_region, item->u.antiexpose.area);
		}
	    }
	  else
	    {
	      queue_delete_link (display_x11->translate_queue, 
				 display_x11->translate_queue->head);
	      queue_item_free (item);
	    }
	}
    }

  clip_region = gdk_region_rectangle (&impl->position_info.clip_rect);
  gdk_region_intersect (invalidate_region, clip_region);

  if (!gdk_region_empty (invalidate_region))
    gdk_window_invalidate_region (window, invalidate_region, FALSE);
  
  gdk_region_destroy (invalidate_region);
  gdk_region_destroy (clip_region);
}

static void
gdk_window_clip_changed (GdkWindow *window, GdkRectangle *old_clip, GdkRectangle *new_clip)
{
  GdkWindowImplX11 *impl;
  GdkWindowObject *obj;
  GdkRegion *old_clip_region;
  GdkRegion *new_clip_region;
  
  if (((GdkWindowObject *)window)->input_only)
    return;

  obj = (GdkWindowObject *) window;
  impl = GDK_WINDOW_IMPL_X11 (obj->impl);
  
  old_clip_region = gdk_region_rectangle (old_clip);
  new_clip_region = gdk_region_rectangle (new_clip);

  /* We need to update this here because gdk_window_invalidate_region makes
   * use if it (through gdk_drawable_get_visible_region
   */
  impl->position_info.clip_rect = *new_clip;
  
  /* Trim invalid region of window to new clip rectangle
   */
  if (obj->update_area)
    gdk_region_intersect (obj->update_area, new_clip_region);

  /* Invalidate newly exposed portion of window
   */
  gdk_region_subtract (new_clip_region, old_clip_region);
  if (!gdk_region_empty (new_clip_region))
    {
      _gdk_x11_window_tmp_unset_bg (window, FALSE);;
      gdk_window_invalidate_region (window, new_clip_region, FALSE);
    }

  gdk_region_destroy (new_clip_region);
  gdk_region_destroy (old_clip_region);
}

#define __GDK_GEOMETRY_X11_C__
#include "gdkaliasdef.c"