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/ui/aura/active_desktop_monitor.h" 6 7 #include "ui/aura/env.h" 8 #include "ui/aura/window_tree_host.h" 9 10 #if defined(USE_X11) 11 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h" 12 #elif defined(OS_WIN) 13 #include "ui/views/widget/desktop_aura/desktop_window_tree_host_win.h" 14 #endif 15 16 // static 17 ActiveDesktopMonitor* ActiveDesktopMonitor::g_instance_ = NULL; 18 ActiveDesktopMonitor(chrome::HostDesktopType initial_desktop)19ActiveDesktopMonitor::ActiveDesktopMonitor( 20 chrome::HostDesktopType initial_desktop) 21 : last_activated_desktop_(initial_desktop) { 22 DCHECK(!g_instance_); 23 g_instance_ = this; 24 aura::Env::GetInstance()->AddObserver(this); 25 } 26 ~ActiveDesktopMonitor()27ActiveDesktopMonitor::~ActiveDesktopMonitor() { 28 DCHECK_EQ(g_instance_, this); 29 aura::Env::GetInstance()->RemoveObserver(this); 30 g_instance_ = NULL; 31 } 32 33 // static GetLastActivatedDesktopType()34chrome::HostDesktopType ActiveDesktopMonitor::GetLastActivatedDesktopType() { 35 // Tests may not have created the monitor. 36 return g_instance_ ? g_instance_->last_activated_desktop_ : 37 chrome::HOST_DESKTOP_TYPE_NATIVE; 38 } 39 40 // static IsDesktopWindow(aura::WindowTreeHost * host)41bool ActiveDesktopMonitor::IsDesktopWindow(aura::WindowTreeHost* host) { 42 // Only windows hosted by a DesktopWindowTreeHost implementation can be mapped 43 // back to a content Window. All others, therefore, must be the root window 44 // for an Ash display. 45 #if defined(OS_WIN) 46 return views::DesktopWindowTreeHostWin::GetContentWindowForHWND( 47 host->GetAcceleratedWidget()) != NULL; 48 #elif defined(USE_X11) 49 return views::DesktopWindowTreeHostX11::GetContentWindowForXID( 50 host->GetAcceleratedWidget()) != NULL; 51 #else 52 NOTREACHED(); 53 return true; 54 #endif 55 } 56 OnWindowInitialized(aura::Window * window)57void ActiveDesktopMonitor::OnWindowInitialized(aura::Window* window) {} 58 OnHostActivated(aura::WindowTreeHost * host)59void ActiveDesktopMonitor::OnHostActivated(aura::WindowTreeHost* host) { 60 if (IsDesktopWindow(host)) 61 last_activated_desktop_ = chrome::HOST_DESKTOP_TYPE_NATIVE; 62 else 63 last_activated_desktop_ = chrome::HOST_DESKTOP_TYPE_ASH; 64 DVLOG(1) << __FUNCTION__ 65 << (last_activated_desktop_ == chrome::HOST_DESKTOP_TYPE_NATIVE ? 66 " native" : " ash") << " desktop activated."; 67 } 68