Added window manager switching capplet. Please test. (a lot).
1999-02-24 Owen Taylor <otaylor@redhat.com> * capplets/wm-properties: Added window manager switching capplet. Please test. (a lot).
This commit is contained in:
Owen Taylor
Owen Taylor
parent
b0424d949e
commit
a3f33d2f9b
9 changed files with 1833 additions and 1 deletions
332
capplets/wm-properties/wm-exec.c
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332
capplets/wm-properties/wm-exec.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
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/* Copyright (C) 1998 Redhat Software Inc.
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* Code available under the Gnu GPL.
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* Authors: Owen Taylor <otaylor@redhat.com>
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*/
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#include <gtk/gtk.h>
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#include <gdk/gdkx.h>
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#include <libgnome/libgnome.h>
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#include "wm-properties.h"
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typedef struct _RestartInfo RestartInfo;
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struct _RestartInfo {
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GnomeDesktopEntry *dentry;
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gint retries;
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WMResultFunc callback;
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gpointer data;
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};
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gboolean
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wm_is_running (void)
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{
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gboolean result;
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gboolean old_warnings = gdk_error_warnings;
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guint old_mask;
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XWindowAttributes attrs;
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gdk_error_warnings = FALSE;
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gdk_error_code = 0;
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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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SubstructureRedirectMask);
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XSync (GDK_DISPLAY(), False);
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if (gdk_error_code == 0) {
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result = FALSE;
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XSelectInput (GDK_DISPLAY(), GDK_ROOT_WINDOW(),
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attrs.your_event_mask);
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} else
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result = TRUE;
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gdk_error_warnings = old_warnings;
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return result;
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}
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/* Cut and paste from gnome-libs/gnome_win_hints_wm_exists, except that we
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* return the xid instead of a window
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*/
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static Window
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find_gnome_wm_window(void)
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{
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Atom r_type;
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int r_format;
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unsigned long count;
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unsigned long bytes_remain;
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unsigned char *prop, *prop2;
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gint prev_error;
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GdkAtom cardinal_atom = gdk_atom_intern ("CARDINAL", FALSE);
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prev_error = gdk_error_warnings;
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gdk_error_warnings = 0;
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if (XGetWindowProperty(GDK_DISPLAY(), GDK_ROOT_WINDOW(),
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gdk_atom_intern ("_WIN_SUPPORTING_WM_CHECK", FALSE),
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0, 1, False, cardinal_atom,
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&r_type, &r_format,
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&count, &bytes_remain, &prop) == Success && prop)
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{
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if (r_type == cardinal_atom && r_format == 32 && count == 1)
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{
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Window n = *(long *)prop;
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if (XGetWindowProperty(GDK_DISPLAY(), n,
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gdk_atom_intern ("_WIN_SUPPORTING_WM_CHECK", FALSE),
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0, 1, False, cardinal_atom,
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&r_type, &r_format, &count, &bytes_remain,
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&prop2) == Success && prop)
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{
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if (r_type == cardinal_atom && r_format == 32 && count == 1)
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{
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XFree(prop);
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XFree(prop2);
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gdk_error_warnings = prev_error;
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return n;
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}
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XFree(prop2);
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}
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}
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XFree(prop);
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}
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gdk_error_warnings = prev_error;
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return None;
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}
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static Window
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find_wm_window_from_client (GdkWindow *client)
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{
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Window window, frame, parent, root;
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Window *children;
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unsigned int nchildren;
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gboolean old_warnings;
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if (!client)
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return None;
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frame = None;
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window = GDK_WINDOW_XWINDOW (client);
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old_warnings = gdk_error_warnings;
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gdk_error_warnings = FALSE;
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gdk_error_code = 0;
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while (XQueryTree (GDK_DISPLAY(), window,
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&root, &parent, &children, &nchildren) &&
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(gdk_error_code == 0)) {
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if (children)
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XFree(children);
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if (window == root)
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break;
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if (root == parent) {
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frame = window;
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break;
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}
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window = parent;
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}
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gdk_error_warnings = old_warnings;
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return frame;
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}
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static gboolean
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window_has_wm_state (Window window)
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{
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Atom r_type;
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int r_format;
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unsigned long count;
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unsigned long bytes_remain;
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unsigned char *prop;
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if (XGetWindowProperty(GDK_DISPLAY(), window,
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gdk_atom_intern ("WM_STATE", FALSE),
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0, 0, False, AnyPropertyType,
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&r_type, &r_format,
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&count, &bytes_remain, &prop) == Success) {
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if (r_type != None) {
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XFree(prop);
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return TRUE;
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}
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}
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return FALSE;
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}
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static gboolean
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descendent_has_wm_state (Window window)
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{
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gboolean result = FALSE;
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Window parent, root;
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Window *children;
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unsigned int nchildren;
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gint i;
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if (!XQueryTree (GDK_DISPLAY(), window,
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&root, &parent, &children, &nchildren))
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return FALSE;
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for (i=0; i<nchildren; i++) {
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if (window_has_wm_state (children[i]) ||
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descendent_has_wm_state (children[i])) {
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result = TRUE;
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break;
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}
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}
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if (children)
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XFree (children);
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return result;
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}
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/* This function tries to find a window manager frame by
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* hunting all the children of the root window
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*/
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static Window
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find_wm_window_from_hunt (void)
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{
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Window parent, root, frame;
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Window *children;
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unsigned int nchildren;
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gboolean old_warnings;
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gint i;
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frame = None;
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old_warnings = gdk_error_warnings;
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gdk_error_warnings = FALSE;
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gdk_error_code = 0;
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XQueryTree (GDK_DISPLAY(), gdk_root_window,
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&root, &parent, &children, &nchildren);
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/* We are looking for a window that doesn't have WIN_STATE
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* set on it, but does have a child with WIN_STATE set
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*/
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for (i=0; i<nchildren; i++) {
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if (!window_has_wm_state (children[i]) &&
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descendent_has_wm_state (children[i])) {
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frame = children[i];
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break;
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}
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}
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if (children)
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XFree (children);
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gdk_error_warnings = old_warnings;
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return frame;
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}
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static Window
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find_wm_window (GdkWindow *client)
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{
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Window wm_window = None;
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/* First, try to find a GNOME compliant WM */
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wm_window = find_gnome_wm_window();
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if (!wm_window) {
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wm_window = find_wm_window_from_client (client);
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}
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if (!wm_window) {
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wm_window = find_wm_window_from_hunt ();
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}
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return wm_window;
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}
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static gboolean
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start_timeout (gpointer data)
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{
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RestartInfo *info = data;
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if (wm_is_running ()) {
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info->callback(WM_SUCCESS, info->data);
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gnome_desktop_entry_free (info->dentry);
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g_free (info);
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return FALSE;
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} else {
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info->retries--;
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if (info->retries > 0)
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return TRUE;
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else {
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info->callback(WM_CANT_START, info->data);
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gnome_desktop_entry_free (info->dentry);
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g_free (info);
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return FALSE;
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}
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}
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}
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static void
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start_do (RestartInfo *info)
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{
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gnome_desktop_entry_launch (info->dentry);
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info->retries = 20;
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gtk_timeout_add (1000, start_timeout, info);
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}
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static gboolean
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kill_timeout (gpointer data)
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{
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RestartInfo *info = data;
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if (!wm_is_running ()) {
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start_do (info);
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return FALSE;
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} else {
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info->retries--;
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if (info->retries > 0)
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return TRUE;
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else {
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info->callback(WM_ALREADY_RUNNING, info->data);
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gnome_desktop_entry_free (info->dentry);
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g_free (info);
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return FALSE;
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}
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}
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}
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void
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wm_restart (WindowManager *new,
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GdkWindow *client,
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WMResultFunc callback,
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gpointer data)
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{
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Window wm_window;
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RestartInfo *info;
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g_return_if_fail (new->is_present);
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info = g_new (RestartInfo, 1);
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info->dentry = gnome_desktop_entry_copy (new->dentry);
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info->callback = callback;
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info->data = data;
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info->retries = 10;
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if (wm_is_running ()) {
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wm_window = find_wm_window (client);
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if (!wm_window) {
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(*callback) (WM_ALREADY_RUNNING, data);
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gnome_desktop_entry_free (info->dentry);
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g_free (info);
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} else {
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XKillClient (GDK_DISPLAY(), wm_window);
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gtk_timeout_add (1000, kill_timeout, info);
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}
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} else {
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start_do (info);
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}
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}
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WindowManager *
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wm_guess_current (void)
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{
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return NULL;
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}
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