Dogcows Code - chaz/openbox/blob - obt/display.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    obt/display.c for the Openbox window manager
   4    Copyright (c) 2007        Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "obt/display.h"
  20
  21 #ifdef HAVE_STRING_H
  22 #  include <string.h>
  23 #endif
  24 #ifdef HAVE_FCNTL_H
  25 #  include <fcntl.h>
  26 #endif
  27 #ifdef HAVE_UNISTD_H
  28 #  include <unistd.h>
  29 #endif
  30
  31 gboolean obt_display_error_occured = FALSE;
  32
  33 gboolean obt_display_extension_xkb       = FALSE;
  34 gint     obt_display_extension_xkb_basep;
  35 gboolean obt_display_extension_shape     = FALSE;
  36 gint     obt_display_extension_shape_basep;
  37 gboolean obt_display_extension_xinerama  = FALSE;
  38 gint     obt_display_extension_xinerama_basep;
  39 gboolean obt_display_extension_randr     = FALSE;
  40 gint     obt_display_extension_randr_basep;
  41 gboolean obt_display_extension_sync      = FALSE;
  42 gint     obt_display_extension_sync_basep;
  43
  44 static gint xerror_handler(Display *d, XErrorEvent *e);
  45
  46 static gboolean xerror_ignore = FALSE;
  47
  48 Display* obt_display_open(const char *display_name)
  49 {
  50     gchar *n;
  51     Display *d = NULL;
  52
  53     n = display_name ? g_strdup(display_name) : NULL;
  54     d = XOpenDisplay(n);
  55     if (d) {
  56         gint junk;
  57         (void)junk;
  58
  59         if (fcntl(ConnectionNumber(d), F_SETFD, 1) == -1)
  60             g_message("Failed to set display as close-on-exec");
  61         XSetErrorHandler(xerror_handler);
  62
  63         /* read what extensions are present */
  64 #ifdef XKB
  65         obt_display_extension_xkb =
  66             XkbQueryExtension(d, &junk,
  67                               &obt_display_extension_xkb_basep, &junk,
  68                               NULL, NULL);
  69         if (!obt_display_extension_xkb)
  70             g_message("XKB extension is not present on the server");
  71 #endif
  72
  73 #ifdef SHAPE
  74         obt_display_extension_shape =
  75             XShapeQueryExtension(d, &obt_display_extension_shape_basep,
  76                                  &junk);
  77         if (!obt_display_extension_shape)
  78             g_message("X Shape extension is not present on the server");
  79 #endif
  80
  81 #ifdef XINERAMA
  82         obt_display_extension_xinerama =
  83             XineramaQueryExtension(d,
  84                                    &obt_display_extension_xinerama_basep,
  85                                    &junk) && XineramaIsActive(d);
  86         if (!obt_display_extension_xinerama)
  87             g_message("Xinerama extension is not present on the server");
  88 #endif
  89
  90 #ifdef XRANDR
  91         obt_display_extension_randr =
  92             XRRQueryExtension(d, &obt_display_extension_randr_basep,
  93                               &junk);
  94         if (!obt_display_extension_randr)
  95             g_message("XRandR extension is not present on the server");
  96 #endif
  97
  98 #ifdef SYNC
  99         obt_display_extension_sync =
 100             XSyncQueryExtension(d, &obt_display_extension_sync_basep,
 101                                 &junk) && XSyncInitialize(d, &junk, &junk);
 102         if (!obt_display_extension_sync)
 103             g_message("X Sync extension is not present on the server or is an "
 104                       "incompatible version");
 105 #endif
 106     }
 107     g_free(n);
 108
 109     return d;
 110 }
 111
 112 void obt_display_close(Display *d)
 113 {
 114     if (d) XCloseDisplay(d);
 115 }
 116
 117 static gint xerror_handler(Display *d, XErrorEvent *e)
 118 {
 119 #ifdef DEBUG
 120     gchar errtxt[128];
 121
 122     XGetErrorText(d, e->error_code, errtxt, 127);
 123     if (!xerror_ignore) {
 124         if (e->error_code == BadWindow)
 125             /*g_message(_("X Error: %s\n"), errtxt)*/;
 126         else
 127             g_error("X Error: %s", errtxt);
 128     } else
 129         g_message("XError code %d '%s'", e->error_code, errtxt);
 130 #else
 131     (void)d; (void)e;
 132 #endif
 133
 134     obt_display_error_occured = TRUE;
 135     return 0;
 136 }
 137
 138 void obt_display_ignore_errors(Display *d, gboolean ignore)
 139 {
 140     XSync(d, FALSE);
 141     xerror_ignore = ignore;
 142     if (ignore) obt_display_error_occured = FALSE;
 143 }