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 #include "obt/xqueue.h"
  24
  25 #ifdef HAVE_STRING_H
  26 #  include <string.h>
  27 #endif
  28 #ifdef HAVE_FCNTL_H
  29 #  include <fcntl.h>
  30 #endif
  31 #ifdef HAVE_UNISTD_H
  32 #  include <unistd.h>
  33 #endif
  34
  35 /* from xqueue.c */
  36 extern void xqueue_init(void);
  37 extern void xqueue_destroy(void);
  38
  39 Display* obt_display = NULL;
  40
  41 gboolean obt_display_error_occured = FALSE;
  42
  43 gboolean obt_display_extension_xkb       = FALSE;
  44 gint     obt_display_extension_xkb_basep;
  45 gboolean obt_display_extension_shape     = FALSE;
  46 gint     obt_display_extension_shape_basep;
  47 gboolean obt_display_extension_xinerama  = FALSE;
  48 gint     obt_display_extension_xinerama_basep;
  49 gboolean obt_display_extension_randr     = FALSE;
  50 gint     obt_display_extension_randr_basep;
  51 gboolean obt_display_extension_sync      = FALSE;
  52 gint     obt_display_extension_sync_basep;
  53
  54 static gint xerror_handler(Display *d, XErrorEvent *e);
  55
  56 static gboolean xerror_ignore = FALSE;
  57
  58 gboolean obt_display_open(const char *display_name)
  59 {
  60     gchar *n;
  61     Display *d = NULL;
  62
  63     n = display_name ? g_strdup(display_name) : NULL;
  64     obt_display = d = XOpenDisplay(n);
  65     if (d) {
  66         gint junk, major, minor;
  67         (void)junk, (void)major, (void)minor;
  68
  69         if (fcntl(ConnectionNumber(d), F_SETFD, 1) == -1)
  70             g_message("Failed to set display as close-on-exec");
  71         XSetErrorHandler(xerror_handler);
  72
  73         /* read what extensions are present */
  74 #ifdef XKB
  75         major = XkbMajorVersion;
  76         minor = XkbMinorVersion;
  77         obt_display_extension_xkb =
  78             XkbQueryExtension(d, &junk,
  79                               &obt_display_extension_xkb_basep, &junk,
  80                               &major, &minor);
  81         if (!obt_display_extension_xkb)
  82             g_message("XKB extension is not present on the server or too old");
  83 #endif
  84
  85 #ifdef SHAPE
  86         obt_display_extension_shape =
  87             XShapeQueryExtension(d, &obt_display_extension_shape_basep,
  88                                  &junk);
  89         if (!obt_display_extension_shape)
  90             g_message("X Shape extension is not present on the server");
  91 #endif
  92
  93 #ifdef XINERAMA
  94         obt_display_extension_xinerama =
  95             XineramaQueryExtension(d,
  96                                    &obt_display_extension_xinerama_basep,
  97                                    &junk) && XineramaIsActive(d);
  98         if (!obt_display_extension_xinerama)
  99             g_message("Xinerama extension is not present on the server");
 100 #endif
 101
 102 #ifdef XRANDR
 103         obt_display_extension_randr =
 104             XRRQueryExtension(d, &obt_display_extension_randr_basep,
 105                               &junk);
 106         if (!obt_display_extension_randr)
 107             g_message("XRandR extension is not present on the server");
 108 #endif
 109
 110 #ifdef SYNC
 111         obt_display_extension_sync =
 112             XSyncQueryExtension(d, &obt_display_extension_sync_basep,
 113                                 &junk) && XSyncInitialize(d, &junk, &junk);
 114         if (!obt_display_extension_sync)
 115             g_message("X Sync extension is not present on the server or is an "
 116                       "incompatible version");
 117 #endif
 118
 119         obt_prop_startup();
 120         obt_keyboard_reload();
 121     }
 122     g_free(n);
 123
 124     if (obt_display)
 125         xqueue_init();
 126
 127     return obt_display != NULL;
 128 }
 129
 130 void obt_display_close(void)
 131 {
 132     obt_keyboard_shutdown();
 133     if (obt_display) {
 134         xqueue_destroy();
 135         XCloseDisplay(obt_display);
 136     }
 137 }
 138
 139 static gint xerror_handler(Display *d, XErrorEvent *e)
 140 {
 141 #ifdef DEBUG
 142     gchar errtxt[128];
 143
 144     XGetErrorText(d, e->error_code, errtxt, 127);
 145     if (!xerror_ignore) {
 146         if (e->error_code == BadWindow)
 147             /*g_debug(_("X Error: %s\n"), errtxt)*/;
 148         else
 149             g_error("X Error: %s", errtxt);
 150     } else
 151         g_debug("Ignoring XError code %d '%s'", e->error_code, errtxt);
 152 #else
 153     (void)d; (void)e;
 154 #endif
 155
 156     obt_display_error_occured = TRUE;
 157     return 0;
 158 }
 159
 160 void obt_display_ignore_errors(gboolean ignore)
 161 {
 162     XSync(obt_display, FALSE);
 163     xerror_ignore = ignore;
 164     if (ignore) obt_display_error_occured = FALSE;
 165 }