gdkdisplay-x11.c

linux下电话本所依赖的一些图形库

/* GDK - The GIMP Drawing Kit
 * gdkdisplay-x11.c
 * 
 * Copyright 2001 Sun Microsystems Inc.
 * Copyright (C) 2004 Nokia Corporation
 *
 * Erwann Chenede <[e-mail]>
 *
 * 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.
 */

#include <config.h>

#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>

#include <glib.h>
#include "gdkx.h"
#include "gdkdisplay.h"
#include "gdkdisplay-x11.h"
#include "gdkscreen.h"
#include "gdkscreen-x11.h"
#include "gdkinternals.h"
#include "gdkinputprivate.h"
#include "xsettings-client.h"
#include "gdkalias.h"

#include <X11/Xatom.h>

#ifdef HAVE_XKB
#include <X11/XKBlib.h>
#endif

#ifdef HAVE_XFIXES
#include <X11/extensions/Xfixes.h>
#endif

static void                 gdk_display_x11_class_init         (GdkDisplayX11Class *class);
static void                 gdk_display_x11_dispose            (GObject            *object);
static void                 gdk_display_x11_finalize           (GObject            *object);

#ifdef HAVE_X11R6
static void gdk_internal_connection_watch (Display  *display,
					   XPointer  arg,
					   gint      fd,
					   gboolean  opening,
					   XPointer *watch_data);
#endif /* HAVE_X11R6 */

static gpointer parent_class = NULL;

/* Note that we never *directly* use WM_LOCALE_NAME, WM_PROTOCOLS,
 * but including them here has the side-effect of getting them
 * into the internal Xlib cache
 */
static const char *const precache_atoms[] = {
  "UTF8_STRING",
  "WM_CLIENT_LEADER",
  "WM_DELETE_WINDOW",
  "WM_LOCALE_NAME",
  "WM_PROTOCOLS",
  "WM_TAKE_FOCUS",
  "_NET_WM_DESKTOP",
  "_NET_WM_ICON",
  "_NET_WM_ICON_NAME",
  "_NET_WM_NAME",
  "_NET_WM_PID",
  "_NET_WM_PING",
  "_NET_WM_STATE",
  "_NET_WM_STATE_STICKY",
  "_NET_WM_STATE_MAXIMIZED_VERT",
  "_NET_WM_STATE_MAXIMIZED_HORZ",
  "_NET_WM_STATE_FULLSCREEN",
  "_NET_WM_SYNC_REQUEST",
  "_NET_WM_SYNC_REQUEST_COUNTER",
  "_NET_WM_WINDOW_TYPE",
  "_NET_WM_WINDOW_TYPE_NORMAL",
  "_NET_WM_USER_TIME",
  "_NET_VIRTUAL_ROOTS"
};

GType
_gdk_display_x11_get_type (void)
{
  static GType object_type = 0;

  if (!object_type)
    {
      static const GTypeInfo object_info =
	{
	  sizeof (GdkDisplayX11Class),
	  (GBaseInitFunc) NULL,
	  (GBaseFinalizeFunc) NULL,
	  (GClassInitFunc) gdk_display_x11_class_init,
	  NULL,			/* class_finalize */
	  NULL,			/* class_data */
	  sizeof (GdkDisplayX11),
	  0,			/* n_preallocs */
	  (GInstanceInitFunc) NULL,
	};
      
      object_type = g_type_register_static (GDK_TYPE_DISPLAY,
					    "GdkDisplayX11",
					    &object_info, 0);
    }
  
  return object_type;
}

static void
gdk_display_x11_class_init (GdkDisplayX11Class * class)
{
  GObjectClass *object_class = G_OBJECT_CLASS (class);
  
  object_class->dispose = gdk_display_x11_dispose;
  object_class->finalize = gdk_display_x11_finalize;
  
  parent_class = g_type_class_peek_parent (class);
}


/**
 * gdk_display_open:
 * @display_name: the name of the display to open
 * @returns: a #GdkDisplay, or %NULL if the display
 *  could not be opened.
 *
 * Opens a display.
 *
 * Since: 2.2
 */
GdkDisplay *
gdk_display_open (const gchar *display_name)
{
  Display *xdisplay;
  GdkDisplay *display;
  GdkDisplayX11 *display_x11;
  GdkWindowAttr attr;
  gint argc;
  gchar *argv[1];
  const char *sm_client_id;
  
  XClassHint *class_hint;
  gulong pid;
  gint i;
#ifdef HAVE_XFIXES
  gint ignore;
#endif

  xdisplay = XOpenDisplay (display_name);
  if (!xdisplay)
    return NULL;
  
  display = g_object_new (GDK_TYPE_DISPLAY_X11, NULL);
  display_x11 = GDK_DISPLAY_X11 (display);

  display_x11->use_xshm = TRUE;
  display_x11->xdisplay = xdisplay;

#ifdef HAVE_X11R6  
  /* Set up handlers for Xlib internal connections */
  XAddConnectionWatch (xdisplay, gdk_internal_connection_watch, NULL);
#endif /* HAVE_X11R6 */
  
  /* initialize the display's screens */ 
  display_x11->screens = g_new (GdkScreen *, ScreenCount (display_x11->xdisplay));
  for (i = 0; i < ScreenCount (display_x11->xdisplay); i++)
    display_x11->screens[i] = _gdk_x11_screen_new (display, i);

  /* We need to initialize events after we have the screen
   * structures in places
   */
  for (i = 0; i < ScreenCount (display_x11->xdisplay); i++)
    _gdk_x11_events_init_screen (display_x11->screens[i]);
  
  /*set the default screen */
  display_x11->default_screen = display_x11->screens[DefaultScreen (display_x11->xdisplay)];

  attr.window_type = GDK_WINDOW_TOPLEVEL;
  attr.wclass = GDK_INPUT_OUTPUT;
  attr.x = 10;
  attr.y = 10;
  attr.width = 10;
  attr.height = 10;
  attr.event_mask = 0;

  display_x11->leader_gdk_window = gdk_window_new (GDK_SCREEN_X11 (display_x11->default_screen)->root_window, 
						   &attr, GDK_WA_X | GDK_WA_Y);
  (_gdk_x11_window_get_toplevel (display_x11->leader_gdk_window))->is_leader = TRUE;

  display_x11->leader_window = GDK_WINDOW_XID (display_x11->leader_gdk_window);

  display_x11->leader_window_title_set = FALSE;

  display_x11->have_render = GDK_UNKNOWN;
  display_x11->have_render_with_trapezoids = GDK_UNKNOWN;

#ifdef HAVE_XFIXES
  if (XFixesQueryExtension (display_x11->xdisplay, 
			    &display_x11->xfixes_event_base, 
			    &ignore))
    {
      display_x11->have_xfixes = TRUE;

      gdk_x11_register_standard_event_type (display,
					    display_x11->xfixes_event_base, 
					    XFixesNumberEvents);
    }
  else
#endif
  display_x11->have_xfixes = FALSE;

  if (_gdk_synchronize)
    XSynchronize (display_x11->xdisplay, True);
  
  _gdk_x11_precache_atoms (display, precache_atoms, G_N_ELEMENTS (precache_atoms));

  class_hint = XAllocClassHint();
  class_hint->res_name = g_get_prgname ();
  
  class_hint->res_class = (char *)gdk_get_program_class ();

  /* XmbSetWMProperties sets the RESOURCE_NAME environment variable
   * from argv[0], so we just synthesize an argument array here.
   */
  argc = 1;
  argv[0] = g_get_prgname ();
  
  XmbSetWMProperties (display_x11->xdisplay,
		      display_x11->leader_window,
		      NULL, NULL, argv, argc, NULL, NULL,
		      class_hint);
  XFree (class_hint);

  sm_client_id = _gdk_get_sm_client_id ();
  if (sm_client_id)
    _gdk_windowing_display_set_sm_client_id (display, sm_client_id);

  pid = getpid ();
  XChangeProperty (display_x11->xdisplay,
		   display_x11->leader_window,
		   gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_PID"),
		   XA_CARDINAL, 32, PropModeReplace, (guchar *) & pid, 1);

  /* We don't yet know a valid time. */
  display_x11->user_time = 0;
  
#ifdef HAVE_XKB
  {
    gint xkb_major = XkbMajorVersion;
    gint xkb_minor = XkbMinorVersion;
    if (XkbLibraryVersion (&xkb_major, &xkb_minor))
      {
        xkb_major = XkbMajorVersion;
        xkb_minor = XkbMinorVersion;
	    
        if (XkbQueryExtension (display_x11->xdisplay, 
			       NULL, &display_x11->xkb_event_type, NULL,
                               &xkb_major, &xkb_minor))
          {
	    Bool detectable_autorepeat_supported;
	    
	    display_x11->use_xkb = TRUE;

            XkbSelectEvents (display_x11->xdisplay,
                             XkbUseCoreKbd,
                             XkbNewKeyboardNotifyMask | XkbMapNotifyMask | XkbStateNotifyMask,
                             XkbNewKeyboardNotifyMask | XkbMapNotifyMask | XkbStateNotifyMask);

	    XkbSetDetectableAutoRepeat (display_x11->xdisplay,
					True,
					&detectable_autorepeat_supported);

	    GDK_NOTE (MISC, g_message ("Detectable autorepeat %s.",
				       detectable_autorepeat_supported ? 
				       "supported" : "not supported"));
	    
	    display_x11->have_xkb_autorepeat = detectable_autorepeat_supported;
          }
      }
  }
#endif

  display_x11->use_sync = FALSE;
#ifdef HAVE_XSYNC
  {
    int major, minor;
    int error_base, event_base;
    
    if (XSyncQueryExtension (display_x11->xdisplay,
			     &event_base, &error_base) &&
        XSyncInitialize (display_x11->xdisplay,
                         &major, &minor))
      display_x11->use_sync = TRUE;
  }
#endif
  
  _gdk_windowing_image_init (display);
  _gdk_events_init (display);
  _gdk_input_init (display);
  _gdk_dnd_init (display);

  g_signal_emit_by_name (gdk_display_manager_get(),
			 "display_opened", display);

  return display;
}

#ifdef HAVE_X11R6
/*
 * XLib internal connection handling
 */
typedef struct _GdkInternalConnection GdkInternalConnection;

struct _GdkInternalConnection
{
  gint	         fd;
  GSource	*source;
  Display	*display;
};

static gboolean
process_internal_connection (GIOChannel  *gioc,
			     GIOCondition cond,
			     gpointer     data)
{
  GdkInternalConnection *connection = (GdkInternalConnection *)data;

  GDK_THREADS_ENTER ();

  XProcessInternalConnection ((Display*)connection->display, connection->fd);

  GDK_THREADS_LEAVE ();

  return TRUE;
}

static GdkInternalConnection *
gdk_add_connection_handler (Display *display,
			    guint    fd)
{
  GIOChannel *io_channel;
  GdkInternalConnection *connection;

  connection = g_new (GdkInternalConnection, 1);

  connection->fd = fd;
  connection->display = display;
  
  io_channel = g_io_channel_unix_new (fd);
  
  connection->source = g_io_create_watch (io_channel, G_IO_IN);
  g_source_set_callback (connection->source,
			 (GSourceFunc)process_internal_connection, connection, NULL);
  g_source_attach (connection->source, NULL);
  
  g_io_channel_unref (io_channel);
  
  return connection;
}

static void
gdk_remove_connection_handler (GdkInternalConnection *connection)
{
  g_source_destroy (connection->source);
  g_free (connection);
}

static void
gdk_internal_connection_watch (Display  *display,
			       XPointer  arg,
			       gint      fd,
			       gboolean  opening,
			       XPointer *watch_data)
{
  if (opening)
    *watch_data = (XPointer)gdk_add_connection_handler (display, fd);
  else
    gdk_remove_connection_handler ((GdkInternalConnection *)*watch_data);
}
#endif /* HAVE_X11R6 */

/**
 * gdk_display_get_name: