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