mutter/src/screen.c

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C
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/* Metacity X screen handler */
/*
* Copyright (C) 2001 Havoc Pennington
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
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#include "screen.h"
#include "util.h"
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#include "errors.h"
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#include "window.h"
#include <cursorfont.h>
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MetaScreen*
meta_screen_new (MetaDisplay *display,
int number)
{
MetaScreen *screen;
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Window xroot;
Display *xdisplay;
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Cursor cursor;
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/* Only display->name, display->xdisplay, and display->error_traps
* can really be used in this function, since normally screens are
* created from the MetaDisplay constructor
*/
xdisplay = display->xdisplay;
meta_verbose ("Trying screen %d on display '%s'\n",
number, display->name);
xroot = RootWindow (xdisplay, number);
/* FVWM checks for None here, I don't know if this
* ever actually happens
*/
if (xroot == None)
{
meta_warning (_("Screen %d on display '%s' is invalid\n"),
number, display->name);
return NULL;
}
/* Select our root window events */
meta_error_trap_push (display);
XSelectInput (xdisplay,
xroot,
SubstructureRedirectMask | SubstructureNotifyMask |
ColormapChangeMask | PropertyChangeMask |
LeaveWindowMask | EnterWindowMask |
ButtonPressMask | ButtonReleaseMask);
if (meta_error_trap_pop (display) != Success)
{
meta_warning (_("Screen %d on display '%s' already has a window manager\n"),
number, display->name);
return NULL;
}
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cursor = XCreateFontCursor (display->xdisplay, XC_left_ptr);
XDefineCursor (display->xdisplay, xroot, cursor);
XFreeCursor (display->xdisplay, cursor);
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screen = g_new (MetaScreen, 1);
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screen->display = display;
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screen->number = number;
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screen->xscreen = ScreenOfDisplay (xdisplay, number);
screen->xroot = xroot;
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meta_verbose ("Added screen %d on display '%s' root 0x%lx\n",
screen->number, screen->display->name, screen->xroot);
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return screen;
}
void
meta_screen_free (MetaScreen *screen)
{
g_free (screen);
}
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void
meta_screen_manage_all_windows (MetaScreen *screen)
{
Window ignored1, ignored2;
Window *children;
unsigned int n_children;
int i;
/* Must grab server to avoid obvious race condition */
meta_display_grab (screen->display);
meta_error_trap_push (screen->display);
XQueryTree (screen->display->xdisplay,
screen->xroot,
&ignored1, &ignored2, &children, &n_children);
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if (meta_error_trap_pop (screen->display))
{
meta_display_ungrab (screen->display);
return;
}
i = 0;
while (i < n_children)
{
meta_window_new (screen->display, children[i]);
++i;
}
meta_display_ungrab (screen->display);
if (children)
XFree (children);
}