1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome/browser/screensaver_window_finder_x11.h" 6 7 #include "base/basictypes.h" 8 #include "ui/base/x/x11_util.h" 9 #include "ui/gfx/x/x11_error_tracker.h" 10 ScreensaverWindowFinder()11ScreensaverWindowFinder::ScreensaverWindowFinder() 12 : exists_(false) { 13 } 14 ScreensaverWindowExists()15bool ScreensaverWindowFinder::ScreensaverWindowExists() { 16 gfx::X11ErrorTracker err_tracker; 17 ScreensaverWindowFinder finder; 18 ui::EnumerateTopLevelWindows(&finder); 19 return finder.exists_ && !err_tracker.FoundNewError(); 20 } 21 ShouldStopIterating(XID window)22bool ScreensaverWindowFinder::ShouldStopIterating(XID window) { 23 if (!ui::IsWindowVisible(window) || !IsScreensaverWindow(window)) 24 return false; 25 exists_ = true; 26 return true; 27 } 28 IsScreensaverWindow(XID window) const29bool ScreensaverWindowFinder::IsScreensaverWindow(XID window) const { 30 // It should occupy the full screen. 31 if (!ui::IsX11WindowFullScreen(window)) 32 return false; 33 34 // For xscreensaver, the window should have _SCREENSAVER_VERSION property. 35 if (ui::PropertyExists(window, "_SCREENSAVER_VERSION")) 36 return true; 37 38 // For all others, like gnome-screensaver, the window's WM_CLASS property 39 // should contain "screensaver". 40 std::string value; 41 if (!ui::GetStringProperty(window, "WM_CLASS", &value)) 42 return false; 43 44 return value.find("screensaver") != std::string::npos; 45 } 46