blob: 74f1a5f6fcd09a0947451c5b213c1d48d192e51d [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/idle/screensaver_window_finder_x11.h"
#include "ui/base/x/x11_util.h"
#include "ui/gfx/x/x11.h"
#include "ui/gfx/x/x11_atom_cache.h"
#include "ui/gfx/x/x11_error_tracker.h"
namespace ui {
: exists_(false) {
bool ScreensaverWindowFinder::ScreensaverWindowExists() {
XScreenSaverInfo info;
XDisplay* display = gfx::GetXDisplay();
XID root = DefaultRootWindow(display);
static int xss_event_base;
static int xss_error_base;
static bool have_xss =
XScreenSaverQueryExtension(display, &xss_event_base, &xss_error_base);
if (have_xss && XScreenSaverQueryInfo(display, root, &info) &&
info.state == ScreenSaverOn) {
return true;
// Ironically, xscreensaver does not conform to the XScreenSaver protocol, so
// info.state == ScreenSaverOff or info.state == ScreenSaverDisabled does not
// necessarily mean that a screensaver is not active, so add a special check
// for xscreensaver.
XAtom lock_atom = gfx::GetAtom("LOCK");
std::vector<int> atom_properties;
if (GetIntArrayProperty(root, "_SCREENSAVER_STATUS", &atom_properties) &&
atom_properties.size() > 0) {
if (atom_properties[0] == static_cast<int>(lock_atom)) {
return true;
// Also check the top level windows to see if any of them are screensavers.
gfx::X11ErrorTracker err_tracker;
ScreensaverWindowFinder finder;
return finder.exists_ && !err_tracker.FoundNewError();
bool ScreensaverWindowFinder::ShouldStopIterating(XID window) {
if (!ui::IsWindowVisible(window) || !IsScreensaverWindow(window))
return false;
exists_ = true;
return true;
bool ScreensaverWindowFinder::IsScreensaverWindow(XID window) const {
// It should occupy the full screen.
if (!ui::IsX11WindowFullScreen(window))
return false;
// For xscreensaver, the window should have _SCREENSAVER_VERSION property.
if (ui::PropertyExists(window, "_SCREENSAVER_VERSION"))
return true;
// For all others, like gnome-screensaver, the window's WM_CLASS property
// should contain "screensaver".
std::string value;
if (!ui::GetStringProperty(window, "WM_CLASS", &value))
return false;
return value.find("screensaver") != std::string::npos;
} // namespace ui