124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
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/*
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* mini-wm.c - simple keyboard focus handling 'wm'.
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*
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* Copyright (C) 2002 Red Hat, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Author(s): Owen Taylor <otaylor@redhat.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <gdk/gdkx.h>
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#include <gtk/gtk.h>
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#include <X11/extensions/Xcomposite.h>
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static gboolean
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is_focusable (Window window)
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{
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Display *xdisplay = GDK_DISPLAY ();
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XWindowAttributes xwa;
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gboolean result = FALSE;
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gdk_error_trap_push ();
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if (XGetWindowAttributes (xdisplay, window, &xwa))
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{
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if (!xwa.override_redirect && xwa.map_state == IsViewable)
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result = TRUE;
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}
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gdk_error_trap_pop ();
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return result;
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}
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static void
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check_focus ()
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{
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Window *children;
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unsigned int n_children;
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Window root;
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Window parent;
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XQueryTree (GDK_DISPLAY(), GDK_ROOT_WINDOW(),
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&root, &parent, &children, &n_children);
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while (n_children > 0) {
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if (is_focusable (children[n_children-1])) {
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gdk_error_trap_push ();
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XSetInputFocus (GDK_DISPLAY(), children[n_children-1],
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RevertToPointerRoot, CurrentTime);
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XSync (GDK_DISPLAY(), 0);
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if (gdk_error_trap_pop () == 0)
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break;
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}
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n_children--;
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}
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XFree (children);
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}
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GdkFilterReturn
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mini_wm_root_filter (GdkXEvent *xevent,
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GdkEvent *event,
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gpointer data)
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{
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XEvent *xev = xevent;
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if (xev->xany.type == MapNotify ||
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xev->xany.type == UnmapNotify ||
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xev->xany.type == ConfigureNotify ||
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xev->xany.type == DestroyNotify)
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{
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check_focus ();
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}
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return GDK_FILTER_CONTINUE;
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}
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void
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mini_wm_start (void)
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{
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XWindowAttributes attrs;
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XCompositeRedirectSubwindows (GDK_DISPLAY(), GDK_ROOT_WINDOW(),
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CompositeRedirectAutomatic);
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XGetWindowAttributes (GDK_DISPLAY(), GDK_ROOT_WINDOW(), &attrs);
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XSelectInput (GDK_DISPLAY(), GDK_ROOT_WINDOW(),
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attrs.your_event_mask | SubstructureNotifyMask);
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gdk_window_add_filter (GDK_ROOT_PARENT (), mini_wm_root_filter, NULL);
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check_focus ();
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}
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int main( int argc,
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char *argv[] )
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{
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gtk_init (&argc, &argv);
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mini_wm_start ();
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/* Indicate back to anaconda that we now have established
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* connection to the display. */
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if (write(1, "#", 1) == -1) abort();
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gtk_main();
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return(0);
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}
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