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      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_WINDOW_EVENT_FILTER_H_
      6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WINDOW_EVENT_FILTER_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 "base/compiler_specific.h"
     13 #include "base/message_loop/message_loop.h"
     14 #include "ui/base/events/event_handler.h"
     15 #include "ui/base/x/x11_atom_cache.h"
     16 #include "ui/views/views_export.h"
     17 
     18 namespace aura {
     19 class RootWindow;
     20 class Window;
     21 }
     22 
     23 namespace gfx {
     24 class Point;
     25 }
     26 
     27 namespace views {
     28 class DesktopActivationClient;
     29 class NativeWidgetAura;
     30 
     31 // An EventFilter that sets properties on X11 windows.
     32 class VIEWS_EXPORT X11WindowEventFilter : public ui::EventHandler {
     33  public:
     34   explicit X11WindowEventFilter(aura::RootWindow* root_window,
     35                                 DesktopActivationClient* activation_client);
     36   virtual ~X11WindowEventFilter();
     37 
     38   // Changes whether borders are shown on this |root_window|.
     39   void SetUseHostWindowBorders(bool use_os_border);
     40 
     41   // Overridden from ui::EventHandler:
     42   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
     43 
     44  private:
     45   // Dispatches a _NET_WM_MOVERESIZE message to the window manager to tell it
     46   // to act as if a border or titlebar drag occurred.
     47   bool DispatchHostWindowDragMovement(int hittest,
     48                                       const gfx::Point& screen_location);
     49 
     50   DesktopActivationClient* activation_client_;
     51 
     52   // The display and the native X window hosting the root window.
     53   Display* xdisplay_;
     54   ::Window xwindow_;
     55 
     56   // The native root window.
     57   ::Window x_root_window_;
     58 
     59   ui::X11AtomCache atom_cache_;
     60 
     61   // True if |xwindow_| is the current _NET_ACTIVE_WINDOW.
     62   bool is_active_;
     63 
     64   DISALLOW_COPY_AND_ASSIGN(X11WindowEventFilter);
     65 };
     66 
     67 }  // namespace views
     68 
     69 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_WINDOW_EVENT_FILTER_H_
     70