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 #include "obt/prop.h"
  21 #include "obt/internal.h"
  22 #include "obt/keyboard.h"
  23
  24 #ifdef HAVE_STRING_H
  25 #  include <string.h>
  26 #endif
  27 #ifdef HAVE_FCNTL_H
  28 #  include <fcntl.h>
  29 #endif
  30 #ifdef HAVE_UNISTD_H
  31 #  include <unistd.h>
  32 #endif
  33
  34 Display* obt_display = NULL;
  35
  36 gboolean obt_display_error_occured = FALSE;
  37
  38 gboolean obt_display_extension_xkb       = FALSE;
  39 gint     obt_display_extension_xkb_basep;
  40 gboolean obt_display_extension_shape     = FALSE;
  41 gint     obt_display_extension_shape_basep;
  42 gboolean obt_display_extension_xinerama  = FALSE;
  43 gint     obt_display_extension_xinerama_basep;
  44 gboolean obt_display_extension_randr     = FALSE;
  45 gint     obt_display_extension_randr_basep;
  46 gboolean obt_display_extension_sync      = FALSE;
  47 gint     obt_display_extension_sync_basep;
  48
  49 static gint xerror_handler(Display *d, XErrorEvent *e);
  50
  51 static gboolean xerror_ignore = FALSE;
  52
  53 gboolean obt_display_open(const char *display_name)
  54 {
  55     gchar *n;
  56     Display *d = NULL;
  57
  58     n = display_name ? g_strdup(display_name) : NULL;
  59     obt_display = d = XOpenDisplay(n);
  60     if (d) {
  61         gint junk, major, minor;
  62         (void)junk, (void)major, (void)minor;
  63
  64         if (fcntl(ConnectionNumber(d), F_SETFD, 1) == -1)
  65             g_message("Failed to set display as close-on-exec");
  66         XSetErrorHandler(xerror_handler);
  67
  68         /* read what extensions are present */
  69 #ifdef XKB
  70         major = XkbMajorVersion;
  71         minor = XkbMinorVersion;
  72         obt_display_extension_xkb =
  73             XkbQueryExtension(d, &junk,
  74                               &obt_display_extension_xkb_basep, &junk,
  75                               &major, &minor);
  76         if (!obt_display_extension_xkb)
  77             g_message("XKB extension is not present on the server or too old");
  78 #endif
  79
  80 #ifdef SHAPE
  81         obt_display_extension_shape =
  82             XShapeQueryExtension(d, &obt_display_extension_shape_basep,
  83                                  &junk);
  84         if (!obt_display_extension_shape)
  85             g_message("X Shape extension is not present on the server");
  86 #endif
  87
  88 #ifdef XINERAMA
  89         obt_display_extension_xinerama =
  90             XineramaQueryExtension(d,
  91                                    &obt_display_extension_xinerama_basep,
  92                                    &junk) && XineramaIsActive(d);
  93         if (!obt_display_extension_xinerama)
  94             g_message("Xinerama extension is not present on the server");
  95 #endif
  96
  97 #ifdef XRANDR
  98         obt_display_extension_randr =
  99             XRRQueryExtension(d, &obt_display_extension_randr_basep,
 100                               &junk);
 101         if (!obt_display_extension_randr)
 102             g_message("XRandR extension is not present on the server");
 103 #endif
 104
 105 #ifdef SYNC
 106         obt_display_extension_sync =
 107             XSyncQueryExtension(d, &obt_display_extension_sync_basep,
 108                                 &junk) && XSyncInitialize(d, &junk, &junk);
 109         if (!obt_display_extension_sync)
 110             g_message("X Sync extension is not present on the server or is an "
 111                       "incompatible version");
 112 #endif
 113
 114         obt_prop_startup();
 115         obt_keyboard_reload();
 116     }
 117     g_free(n);
 118
 119     return obt_display != NULL;
 120 }
 121
 122 void obt_display_close(void)
 123 {
 124     obt_keyboard_shutdown();
 125     if (obt_display) XCloseDisplay(obt_display);
 126 }
 127
 128 static gint xerror_handler(Display *d, XErrorEvent *e)
 129 {
 130 #ifdef DEBUG
 131     gchar errtxt[128];
 132
 133     XGetErrorText(d, e->error_code, errtxt, 127);
 134     if (!xerror_ignore) {
 135         if (e->error_code == BadWindow)
 136             /*g_debug(_("X Error: %s\n"), errtxt)*/;
 137         else
 138             g_error("X Error: %s", errtxt);
 139     } else
 140         g_debug("Ignoring XError code %d '%s'", e->error_code, errtxt);
 141 #else
 142     (void)d; (void)e;
 143 #endif
 144
 145     obt_display_error_occured = TRUE;
 146     return 0;
 147 }
 148
 149 void obt_display_ignore_errors(gboolean ignore)
 150 {
 151     XSync(obt_display, FALSE);
 152     xerror_ignore = ignore;
 153     if (ignore) obt_display_error_occured = FALSE;
 154 }