gdkwindow.c

gtk是linux一款强大的夸平台的图形化开发工具

/* 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 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GTK+ Team and others 1997-1999.  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 <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <netinet/in.h>
#include "gdk.h"
#include "config.h"
#include "gdkinput.h"
#include "gdkprivate.h"
#include "MwmUtil.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>


#ifdef HAVE_SHAPE_EXT
#include <X11/extensions/shape.h>
#endif

const int gdk_event_mask_table[20] =
{
  ExposureMask,
  PointerMotionMask,
  PointerMotionHintMask,
  ButtonMotionMask,
  Button1MotionMask,
  Button2MotionMask,
  Button3MotionMask,
  ButtonPressMask | OwnerGrabButtonMask,
  ButtonReleaseMask | OwnerGrabButtonMask,
  KeyPressMask,
  KeyReleaseMask,
  EnterWindowMask,
  LeaveWindowMask,
  FocusChangeMask,
  StructureNotifyMask,
  PropertyChangeMask,
  VisibilityChangeMask,
  0,				/* PROXIMITY_IN */
  0,				/* PROXIMTY_OUT */
  SubstructureNotifyMask
};
const int gdk_nevent_masks = sizeof (gdk_event_mask_table) / sizeof (int);

/* Forward declarations */
static gboolean gdk_window_gravity_works (void);
static void     gdk_window_set_static_win_gravity (GdkWindow *window, 
						   gboolean   on);
static gboolean gdk_window_have_shape_ext (void);

/* internal function created for and used by gdk_window_xid_at_coords */
Window
gdk_window_xid_at (Window   base,
		   gint     bx,
		   gint     by,
		   gint     x,
		   gint     y, 
		   GList   *excludes,
		   gboolean excl_child)
{
  GdkWindow *window;
  GdkWindowPrivate *private;
  Display *disp;
  Window *list = NULL;
  Window child = 0, parent_win = 0, root_win = 0;
  int i;
  unsigned int ww, wh, wb, wd, num;
  int wx, wy;
  
  window = (GdkWindow*) &gdk_root_parent;
  private = (GdkWindowPrivate*) window;
  disp = private->xdisplay;
  if (!XGetGeometry (disp, base, &root_win, &wx, &wy, &ww, &wh, &wb, &wd))
    return 0;
  wx += bx;
  wy += by;
  
  if (!((x >= wx) &&
	(y >= wy) &&
	(x < (int) (wx + ww)) &&
	(y < (int) (wy + wh))))
    return 0;
  
  if (!XQueryTree (disp, base, &root_win, &parent_win, &list, &num))
    return base;
  
  if (list)
    {
      for (i = num - 1; ; i--)
	{
	  if ((!excl_child) || (!g_list_find (excludes, (gpointer *) list[i])))
	    {
	      if ((child = gdk_window_xid_at (list[i], wx, wy, x, y, excludes, excl_child)) != 0)
		{
		  XFree (list);
		  return child;
		}
	    }
	  if (!i)
	    break;
	}
      XFree (list);
    }
  return base;
}

/* 
 * The following fucntion by The Rasterman <[e-mail]>
 * This function returns the X Window ID in which the x y location is in 
 * (x and y being relative to the root window), excluding any windows listed
 * in the GList excludes (this is a list of X Window ID's - gpointer being
 * the Window ID).
 * 
 * This is primarily designed for internal gdk use - for DND for example
 * when using a shaped icon window as the drag object - you exclude the
 * X Window ID of the "icon" (perhaps more if excludes may be needed) and
 * You can get back an X Window ID as to what X Window ID is infact under
 * those X,Y co-ordinates.
 */
Window
gdk_window_xid_at_coords (gint     x,
			  gint     y,
			  GList   *excludes,
			  gboolean excl_child)
{
  GdkWindow *window;
  GdkWindowPrivate *private;
  Display *disp;
  Window *list = NULL;
  Window root, child = 0, parent_win = 0, root_win = 0;
  unsigned int num;
  int i;
  
  window = (GdkWindow*) &gdk_root_parent;
  private = (GdkWindowPrivate*) window;
  disp = private->xdisplay;
  root = private->xwindow;
  num = g_list_length (excludes);
  
  XGrabServer (disp);
  if (!XQueryTree (disp, root, &root_win, &parent_win, &list, &num))
    {
      XUngrabServer (disp);
      return root;
    }
  if (list)
    {
      i = num - 1;
      do
	{
	  XWindowAttributes xwa;
	  
	  XGetWindowAttributes (disp, list [i], &xwa);
	  
	  if (xwa.map_state != IsViewable)
	    continue;
	  
	  if (excl_child && g_list_find (excludes, (gpointer *) list[i]))
	    continue;
	  
	  if ((child = gdk_window_xid_at (list[i], 0, 0, x, y, excludes, excl_child)) == 0)
	    continue;
	  
	  if (excludes)
	    {
	      if (!g_list_find (excludes, (gpointer *) child))
		{
		  XFree (list);
		  XUngrabServer (disp);
		  return child;
		}
	    }
	  else
	    {
	      XFree (list);
	      XUngrabServer (disp);
	      return child;
	    }
	} while (--i > 0);
      XFree (list);
    }
  XUngrabServer (disp);
  return root;
}

void
gdk_window_init (void)
{
  XWindowAttributes xattributes;
  unsigned int width;
  unsigned int height;
  unsigned int border_width;
  unsigned int depth;
  int x, y;
  
  XGetGeometry (gdk_display, gdk_root_window, &gdk_root_window,
		&x, &y, &width, &height, &border_width, &depth);
  XGetWindowAttributes (gdk_display, gdk_root_window, &xattributes);
  
  gdk_root_parent.xwindow = gdk_root_window;
  gdk_root_parent.xdisplay = gdk_display;
  gdk_root_parent.window_type = GDK_WINDOW_ROOT;
  gdk_root_parent.window.user_data = NULL;
  gdk_root_parent.width = width;
  gdk_root_parent.height = height;
  gdk_root_parent.children = NULL;
  gdk_root_parent.colormap = NULL;
  gdk_root_parent.ref_count = 1;
  
  gdk_xid_table_insert (&gdk_root_window, &gdk_root_parent);
}

static GdkAtom wm_client_leader_atom = GDK_NONE;

GdkWindow*
gdk_window_new (GdkWindow     *parent,
		GdkWindowAttr *attributes,
		gint           attributes_mask)
{
  GdkWindow *window;
  GdkWindowPrivate *private;
  GdkWindowPrivate *parent_private;
  GdkVisual *visual;
  Display *parent_display;
  Window xparent;
  Visual *xvisual;
  XSetWindowAttributes xattributes;
  long xattributes_mask;
  XSizeHints size_hints;
  XWMHints wm_hints;
  XClassHint *class_hint;
  int x, y, depth;
  unsigned int class;
  char *title;
  int i;
  
  g_return_val_if_fail (attributes != NULL, NULL);
  
  if (!parent)
    parent = (GdkWindow*) &gdk_root_parent;
  
  parent_private = (GdkWindowPrivate*) parent;
  if (parent_private->destroyed)
    return NULL;
  
  xparent = parent_private->xwindow;
  parent_display = parent_private->xdisplay;
  
  private = g_new (GdkWindowPrivate, 1);
  window = (GdkWindow*) private;
  
  private->parent = parent;
  
  private->xdisplay = parent_display;
  private->destroyed = FALSE;
  private->mapped = FALSE;
  private->guffaw_gravity = FALSE;
  private->resize_count = 0;
  private->ref_count = 1;
  xattributes_mask = 0;
  
  if (attributes_mask & GDK_WA_X)
    x = attributes->x;
  else
    x = 0;
  
  if (attributes_mask & GDK_WA_Y)
    y = attributes->y;
  else
    y = 0;
  
  private->x = x;
  private->y = y;
  private->width = (attributes->width > 1) ? (attributes->width) : (1);
  private->height = (attributes->height > 1) ? (attributes->height) : (1);
  private->window_type = attributes->window_type;
  private->extension_events = FALSE;
  
  private->filters = NULL;
  private->children = NULL;
  
  window->user_data = NULL;
  
  if (attributes_mask & GDK_WA_VISUAL)
    visual = attributes->visual;
  else
    visual = gdk_visual_get_system ();
  xvisual = ((GdkVisualPrivate*) visual)->xvisual;
  
  xattributes.event_mask = StructureNotifyMask;
  for (i = 0; i < gdk_nevent_masks; i++)
    {
      if (attributes->event_mask & (1 << (i + 1)))
	xattributes.event_mask |= gdk_event_mask_table[i];
    }
  
  if (xattributes.event_mask)
    xattributes_mask |= CWEventMask;
  
  if (attributes_mask & GDK_WA_NOREDIR)
    {
      xattributes.override_redirect =
	(attributes->override_redirect == FALSE)?False:True;
      xattributes_mask |= CWOverrideRedirect;
    } 
  else
    xattributes.override_redirect = False;
  
  if (parent_private && parent_private->guffaw_gravity)
    {
      xattributes.win_gravity = StaticGravity;
      xattributes_mask |= CWWinGravity;
    }
  
  if (attributes->wclass == GDK_INPUT_OUTPUT)
    {
      class = InputOutput;
      depth = visual->depth;
      
      if (attributes_mask & GDK_WA_COLORMAP)
	private->colormap = attributes->colormap;
      else
	{
	  if ((((GdkVisualPrivate*)gdk_visual_get_system ())->xvisual) == xvisual)
	    private->colormap = gdk_colormap_get_system ();
	  else
	    private->colormap = gdk_colormap_new (visual, False);
	}
      
      xattributes.background_pixel = BlackPixel (gdk_display, gdk_screen);
      xattributes.border_pixel = BlackPixel (gdk_display, gdk_screen);
      xattributes_mask |= CWBorderPixel | CWBackPixel;
      
      switch (private->window_type)
	{
	case GDK_WINDOW_TOPLEVEL:
	  xattributes.colormap = ((GdkColormapPrivate*) private->colormap)->xcolormap;
	  xattributes_mask |= CWColormap;
	  
	  xparent = gdk_root_window;
	  break;
	  
	case GDK_WINDOW_CHILD:
	  xattributes.colormap = ((GdkColormapPrivate*) private->colormap)->xcolormap;
	  xattributes_mask |= CWColormap;
	  break;
	  
	case GDK_WINDOW_DIALOG:
	  xattributes.colormap = ((GdkColormapPrivate*) private->colormap)->xcolormap;
	  xattributes_mask |= CWColormap;
	  
	  xparent = gdk_root_window;
	  break;
	  
	case GDK_WINDOW_TEMP:
	  xattributes.colormap = ((GdkColormapPrivate*) private->colormap)->xcolormap;
	  xattributes_mask |= CWColormap;
	  
	  xparent = gdk_root_window;
	  
	  xattributes.save_under = True;
	  xattributes.override_redirect = True;
	  xattributes.cursor = None;
	  xattributes_mask |= CWSaveUnder | CWOverrideRedirect;
	  break;
	case GDK_WINDOW_ROOT:
	  g_error ("cannot make windows of type GDK_WINDOW_ROOT");
	  break;
	case GDK_WINDOW_PIXMAP:
	  g_error ("cannot make windows of type GDK_WINDOW_PIXMAP (use gdk_pixmap_new)");
	  break;
	}
    }
  else
    {
      depth = 0;
      class = InputOnly;
      private->colormap = NULL;
    }
  
  private->xwindow = XCreateWindow (private->xdisplay, xparent,
				    x, y, private->width, private->height,
				    0, depth, class, xvisual,
				    xattributes_mask, &xattributes);
  gdk_window_ref (window);
  gdk_xid_table_insert (&private->xwindow, window);
  
  if (private->colormap)
    gdk_colormap_ref (private->colormap);
  
  gdk_window_set_cursor (window, ((attributes_mask & GDK_WA_CURSOR) ?
				  (attributes->cursor) :
				  NULL));
  
  if (parent_private)
    parent_private->children = g_list_prepend (parent_private->children, window);
  
  switch (private->window_type)
    {
    case GDK_WINDOW_DIALOG:
      XSetTransientForHint (private->xdisplay, private->xwindow, xparent);
    case GDK_WINDOW_TOPLEVEL:
    case GDK_WINDOW_TEMP:
      XSetWMProtocols (private->xdisplay, private->xwindow, gdk_wm_window_protocols, 2);
      break;
    case GDK_WINDOW_CHILD:
      if ((attributes->wclass == GDK_INPUT_OUTPUT) &&
	  (private->colormap != gdk_colormap_get_system ()) &&
	  (private->colormap != gdk_window_get_colormap (gdk_window_get_toplevel (window))))
	{
	  GDK_NOTE (MISC, g_message ("adding colormap window\n"));
	  gdk_window_add_colormap_windows (window);
	}
      
      return window;
    default:
      
      return window;
    }
  
  size_hints.flags = PSize;
  size_hints.width = private->width;
  size_hints.height = private->height;
  
  wm_hints.flags = InputHint | StateHint | WindowGroupHint;
  wm_hints.window_group = gdk_leader_window;
  wm_hints.input = True;
  wm_hints.initial_state = NormalState;
  
  /* FIXME: Is there any point in doing this? Do any WM's pay
   * attention to PSize, and even if they do, is this the
   * correct value???
   */
  XSetWMNormalHints (private->xdisplay, private->xwindow, &size_hints);
  
  XSetWMHints (private->xdisplay, private->xwindow, &wm_hints);
  
  if (!wm_client_leader_atom)
    wm_client_leader_atom = gdk_atom_intern ("WM_CLIENT_LEADER", FALSE);
  
  XChangeProperty (private->xdisplay, private->xwindow,
	   	   wm_client_leader_atom,
		   XA_WINDOW, 32, PropModeReplace,
		   (guchar*) &gdk_leader_window, 1);
  
  if (attributes_mask & GDK_WA_TITLE)
    title = attributes->title;
  else
    title = g_get_prgname ();
  
  XmbSetWMProperties (private->xdisplay, private->xwindow,
                      title, title,
                      NULL, 0,
                      NULL, NULL, NULL);
  
  if (attributes_mask & GDK_WA_WMCLASS)
    {
      class_hint = XAllocClassHint ();
      class_hint->res_name = attributes->wmclass_name;
      class_hint->res_class = attributes->wmclass_class;
      XSetClassHint (private->xdisplay, private->xwindow, class_hint);
      XFree (class_hint);
    }
  
  
  return window;
}

GdkWindow *
gdk_window_foreign_new (guint32 anid)
{
  GdkWindow *window;
  GdkWindowPrivate *private;
  GdkWindowPrivate *parent_private;
  XWindowAttributes attrs;
  Window root, parent;
  Window *children = NULL;
  guint nchildren;
  gboolean result;

  gdk_error_trap_push ();
  result = XGetWindowAttributes (gdk_display, anid, &attrs);
  if (gdk_error_trap_pop () || !result)
    return NULL;

  /* FIXME: This is pretty expensive. Maybe the caller should supply
   *        the parent */
  gdk_error_trap_push ();
  result = XQueryTree (gdk_display, anid, &root, &parent, &children, &nchildren);
  if (gdk_error_trap_pop () || !result)
    return NULL;
  
  private = g_new (GdkWindowPrivate, 1);
  window = (GdkWindow*) private;
  
  if (children)
    XFree (children);
  private->parent = gdk_xid_table_lookup (parent);
  
  parent_private = (GdkWindowPrivate *)private->parent;
  
  if (parent_private)
    parent_private->children = g_list_prepend (parent_private->children, window);
  
  private->xwindow = anid;
  private->xdisplay = gdk_display;
  private->x = attrs.x;
  private->y = attrs.y;
  private->width = attrs.width;
  private->height = attrs.height;
  private->resize_count = 0;
  private->ref_count = 1;
  private->window_type = GDK_WINDOW_FOREIGN;
  private->destroyed = FALSE;
  private->mapped = (attrs.map_state != IsUnmapped);
  private->guffaw_gravity = FALSE;
  private->extension_events = 0;
  
  private->colormap = NULL;
  
  private->filters = NULL;
  private->children = NULL;
  
  window->user_data = NULL;