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 #include "Xdisplay.h"
  23 #include "XScreen.h"
  24 #include "Util.h"
  25 #include <iostream>
  26 #include <algorithm>
  27
  28 using std::cerr;
  29
  30 Xdisplay::Xdisplay(const char *dpyname) {
  31   _grabs = 0;
  32   _hasshape = false;
  33
  34   _display = XOpenDisplay(dpy_name);
  35   if (_display == NULL) {
  36     cerr << "Could not open display. Connection to X server failed.\n";
  37     ::exit(2);
  38   }
  39   if (-1 == fcntl(ConnectionNumber(display), F_SETFD, 1)) {
  40     cerr << "Could not mark display connection as close-on-exec.\n";
  41     ::exit(2);
  42   }
  43   _name = XDisplayName(dpyname);
  44
  45   XSetErrorHandler(XErrorHandler);
  46
  47 #ifdef    SHAPE
  48   int waste;
  49   _hasshape = XShapeQueryExtension(_display, &_shape_event_base, &waste);
  50 #endif // SHAPE
  51
  52   const unsigned int scount = ScreenCount(_display);
  53   _screens.reserve(scount);
  54   for (unsigned int s = 0; s < scount; s++)
  55     _screens.push_back(new XScreen(_display, s));
  56 }
  57
  58
  59 Xdisplay::~Xdisplay() {
  60   std::for_each(_screens.begin(), _screens.end(), PointerAssassin());
  61   XCloseDisplay(_display);
  62 }
  63
  64
  65 /*
  66  * Return information about a screen.
  67  */
  68 XScreen *Xdisplay::screen(unsigned int s) const {
  69   ASSERT(s < _screens.size());
  70   return _screens[s];
  71 }
  72
  73
  74 /*
  75  * Grab the X server
  76  */
  77 void XDisplay::grab() {
  78   if (_grabs++ == 0)
  79     XGrabServer(_display);
  80 }
  81
  82
  83 /*
  84  * Release the X server from a grab
  85  */
  86 void XDisplay::ungrab() {
  87   if (--_grabs == 0)
  88     XUngrabServer(_display);
  89 }