Dogcows Code - chaz/openbox/blob - src/XDisplay.cc

   1 // XDisplay.cc for Openbox
   2 // Copyright (c) 2002 - 2002 Ben Janens (ben at orodu.net)
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining a
   5 // copy of this software and associated documentation files (the "Software"),
   6 // to deal in the Software without restriction, including without limitation
   7 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 // and/or sell copies of the Software, and to permit persons to whom the
   9 // Software is furnished to do so, subject to the following conditions:
  10 //
  11 // The above copyright notice and this permission notice shall be included in
  12 // all copies or substantial portions of the Software.
  13 //
  14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20 // DEALINGS IN THE SOFTWARE.
  21
  22 #ifdef HAVE_CONFIG_H
  23 # include "../config.h"
  24 #endif
  25
  26 #ifdef HAVE_UNNISTD_H
  27 # include <unistd.h>
  28 #endif
  29
  30 #ifdef HAVE_FCNTL_H
  31 # include <fcntl.h>
  32 #endif
  33
  34 #ifdef SHAPE
  35 # include <X11/extensions/shape.h>
  36 #endif
  37
  38 #include "XDisplay.h"
  39 #include "XScreen.h"
  40 #include "Util.h"
  41 #include <iostream>
  42 #include <algorithm>
  43
  44 using std::cerr;
  45
  46 int XDisplay::XErrorHandler(Display *d, XErrorEvent *e) {
  47   d=d;e=e;
  48   return 0;
  49 }
  50
  51
  52 XDisplay::XDisplay(const char *dpyname) {
  53   _grabs = 0;
  54   _hasshape = false;
  55
  56   _display = XOpenDisplay(dpyname);
  57   if (_display == NULL) {
  58     cerr << "Could not open display. Connection to X server failed.\n";
  59     ::exit(2);
  60   }
  61   if (-1 == fcntl(ConnectionNumber(_display), F_SETFD, 1)) {
  62     cerr << "Could not mark display connection as close-on-exec.\n";
  63     ::exit(2);
  64   }
  65   _name = XDisplayName(dpyname);
  66
  67   XSetErrorHandler(XErrorHandler);
  68
  69 #ifdef    SHAPE
  70   int waste;
  71   _hasshape = XShapeQueryExtension(_display, &_shape_event_base, &waste);
  72 #endif // SHAPE
  73
  74   const unsigned int scount = ScreenCount(_display);
  75   _screens.reserve(scount);
  76   for (unsigned int s = 0; s < scount; s++)
  77     _screens.push_back(new XScreen(this, s));
  78 }
  79
  80
  81 XDisplay::~XDisplay() {
  82   std::for_each(_screens.begin(), _screens.end(), PointerAssassin());
  83   XCloseDisplay(_display);
  84 }
  85
  86
  87 /*
  88  * Return information about a screen.
  89  */
  90 XScreen *XDisplay::screen(unsigned int s) const {
  91   ASSERT(s < _screens.size());
  92   return _screens[s];
  93 }
  94
  95
  96 /*
  97  * Grab the X server
  98  */
  99 void XDisplay::grab() {
 100   if (_grabs++ == 0)
 101     XGrabServer(_display);
 102 }
 103
 104
 105 /*
 106  * Release the X server from a grab
 107  */
 108 void XDisplay::ungrab() {
 109   if (--_grabs == 0)
 110     XUngrabServer(_display);
 111 }