src/colormap.c

   1 /* colormap.c - colormap handling code
   2  *
   3  *  Window Maker window manager
   4  *
   5  *  Copyright (c) 1998 Alfredo K. Kojima
   6  *
   7  *  This code slightly based on fvwm code,
   8  *  Copyright (c) Rob Nation and others
   9  *  but completely rewritten.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 2 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, write to the Free Software
  23  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  24  *  USA.
  25  */
  26
  27
  28 #include "wconfig.h"
  29
  30 #include "WindowMaker.h"
  31 #include <X11/Xatom.h>
  32 #include "window.h"
  33
  34
  35
  36 void
  37 wColormapInstallForWindow(WScreen *scr, WWindow *wwin)
  38 {
  39     int i;
  40     XWindowAttributes attributes;
  41     int done = 0;
  42     Window xwin = None;
  43
  44     if (wwin) {
  45         xwin = wwin->client_win;
  46     } else {
  47         xwin = scr->root_win;
  48     }
  49
  50     scr->cmap_window = wwin;
  51
  52     if (scr->root_colormap_install_count > 0) {
  53         scr->original_cmap_window = wwin;
  54         return;
  55     }
  56
  57     /* install colormap for all windows of the client */
  58     if (wwin && wwin->cmap_window_no > 0 && wwin->cmap_windows) {
  59         for (i = wwin->cmap_window_no - 1; i >= 0; i--) {
  60             Window w;
  61
  62             w = wwin->cmap_windows[i];
  63             if (w == wwin->client_win)
  64                 done = 1;
  65
  66             XGetWindowAttributes(dpy, w, &attributes);
  67             if (attributes.colormap == None)
  68                 attributes.colormap = scr->colormap;
  69
  70             if (scr->current_colormap != attributes.colormap) {
  71                 scr->current_colormap = attributes.colormap;
  72                 /*
  73                  * ICCCM 2.0: some client requested permission
  74                  * to install colormaps by itself and we granted.
  75                  * So, we can't install any colormaps.
  76                  */
  77                 if (!scr->flags.colormap_stuff_blocked)
  78                     XInstallColormap(dpy, attributes.colormap);
  79             }
  80         }
  81     }
  82
  83     if (!done) {
  84         XGetWindowAttributes(dpy, xwin, &attributes);
  85         if (attributes.colormap == None)
  86             attributes.colormap = scr->colormap;
  87
  88         if (scr->current_colormap != attributes.colormap) {
  89             scr->current_colormap = attributes.colormap;
  90             if (!scr->flags.colormap_stuff_blocked)
  91                 XInstallColormap(dpy, attributes.colormap);
  92         }
  93     }
  94     XSync(dpy, False);
  95 }
  96
  97
  98 void
  99 wColormapInstallRoot(WScreen *scr)
 100 {
 101     if (scr->root_colormap_install_count == 0) {
 102         wColormapInstallForWindow(scr, NULL);
 103         scr->original_cmap_window = scr->cmap_window;
 104     }
 105     scr->root_colormap_install_count++;
 106 }
 107
 108
 109 void
 110 wColormapUninstallRoot(WScreen *scr)
 111 {
 112     if (scr->root_colormap_install_count > 0)
 113         scr->root_colormap_install_count--;
 114
 115     if (scr->root_colormap_install_count == 0) {
 116         wColormapInstallForWindow(scr, scr->original_cmap_window);
 117         scr->original_cmap_window = NULL;
 118     }
 119 }
 120
 121
 122 void
 123 wColormapAllowClientInstallation(WScreen *scr, Bool starting)
 124 {
 125     scr->flags.colormap_stuff_blocked = starting;
 126     /*
 127      * Client stopped managing the colormap stuff. Restore the colormap
 128      * that would be installed if the client did not request colormap
 129      * stuff.
 130      */
 131     if (!starting) {
 132         XInstallColormap(dpy, scr->current_colormap);
 133         XSync(dpy, False);
 134     }
 135 }