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 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_ 6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_ 7 8 #include <X11/Xlib.h> 9 // Get rid of a macro from Xlib.h that conflicts with Aura's RootWindow class. 10 #undef RootWindow 11 12 #include <vector> 13 14 #include "ui/aura/env_observer.h" 15 #include "ui/events/platform/platform_event_dispatcher.h" 16 #include "ui/gfx/x/x11_atom_cache.h" 17 #include "ui/gfx/x/x11_types.h" 18 #include "ui/views/views_export.h" 19 20 template <typename T> struct DefaultSingletonTraits; 21 22 namespace views { 23 24 // A singleton that owns global objects related to the desktop and listens for 25 // X11 events on the X11 root window. Destroys itself when aura::Env is 26 // deleted. 27 class VIEWS_EXPORT X11DesktopHandler : public ui::PlatformEventDispatcher, 28 public aura::EnvObserver { 29 public: 30 // Returns the singleton handler. 31 static X11DesktopHandler* get(); 32 33 // Gets/sets the X11 server time of the most recent mouse click, touch or 34 // key press on a Chrome window. 35 int wm_user_time_ms() const { 36 return wm_user_time_ms_; 37 } 38 void set_wm_user_time_ms(unsigned long time_ms) { 39 wm_user_time_ms_ = time_ms; 40 } 41 42 // Sends a request to the window manager to activate |window|. 43 // This method should only be called if the window is already mapped. 44 void ActivateWindow(::Window window); 45 46 // Attempts to get the window manager to deactivate |window| by moving it to 47 // the bottom of the stack. Regardless of whether |window| was actually 48 // deactivated, sets the window as inactive in our internal state. 49 void DeactivateWindow(::Window window); 50 51 // Checks if the current active window is |window|. 52 bool IsActiveWindow(::Window window) const; 53 54 // Processes activation/focus related events. Some of these events are 55 // dispatched to the X11 window dispatcher, and not to the X11 root-window 56 // dispatcher. The window dispatcher sends these events to here. 57 void ProcessXEvent(XEvent* event); 58 59 // ui::PlatformEventDispatcher 60 virtual bool CanDispatchEvent(const ui::PlatformEvent& event) OVERRIDE; 61 virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) OVERRIDE; 62 63 // Overridden from aura::EnvObserver: 64 virtual void OnWindowInitialized(aura::Window* window) OVERRIDE; 65 virtual void OnWillDestroyEnv() OVERRIDE; 66 67 private: 68 enum ActiveState { 69 ACTIVE, 70 NOT_ACTIVE 71 }; 72 73 X11DesktopHandler(); 74 virtual ~X11DesktopHandler(); 75 76 // Handles changes in activation. 77 void OnActiveWindowChanged(::Window window, ActiveState active_state); 78 79 // Called when |window| has been created or destroyed. |window| may not be 80 // managed by Chrome. 81 void OnWindowCreatedOrDestroyed(int event_type, XID window); 82 83 // The display and the native X window hosting the root window. 84 XDisplay* xdisplay_; 85 86 // The native root window. 87 ::Window x_root_window_; 88 89 // The X11 server time of the most recent mouse click, touch, or key press 90 // on a Chrome window. 91 unsigned long wm_user_time_ms_; 92 93 // The active window according to X11 server. 94 ::Window current_window_; 95 96 // Whether we should treat |current_window_| as active. In particular, we 97 // pretend that a window is deactivated after a call to DeactivateWindow(). 98 ActiveState current_window_active_state_; 99 100 ui::X11AtomCache atom_cache_; 101 102 bool wm_supports_active_window_; 103 104 DISALLOW_COPY_AND_ASSIGN(X11DesktopHandler); 105 }; 106 107 } // namespace views 108 109 #endif // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_H_ 110
