| // 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 { |
| |
| ScreensaverWindowFinder::ScreensaverWindowFinder() |
| : 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; |
| ui::EnumerateTopLevelWindows(&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 |