Make File-Picker modal on Linux

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
 #define UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <X11/extensions/shape.h>
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
+#include "ui/aura/scoped_window_targeter.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/cursor/cursor_loader_x11.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/views/views_export.h"
 #include "ui/views/widget/desktop_aura/desktop_window_tree_host.h"
 
@@ skipping 52 matching lines @@
   void AddObserver(views::DesktopWindowTreeHostObserverX11* observer);
   void RemoveObserver(views::DesktopWindowTreeHostObserverX11* observer);
 
   // Swaps the current handler for events in the non client view with |handler|.
   void SwapNonClientEventHandler(scoped_ptr<ui::EventHandler> handler);
 
   // Runs the |func| callback for each content-window, and deallocates the
   // internal list of open windows.
   static void CleanUpWindowList(void (*func)(aura::Window* window));
 
+  // Disables event listening to make |dialog| modal.
+  void DisableEventListening(XID dialog);
+
+  // Enables event listening after closing |dialog|.
+  void EnableEventListening();
+
+  // Returns XID of dialog currently displayed. When it returns 0,
+  // there is no dialog on the host window.
+  const XID GetModalDialog();
+
  protected:
   // Overridden from DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
             const Widget::InitParams& params) override;
   void OnNativeWidgetCreated(const Widget::InitParams& params) override;
   scoped_ptr<corewm::Tooltip> CreateTooltip() override;
   scoped_ptr<aura::client::DragDropClient> CreateDragDropClient(
       DesktopNativeCursorManager* cursor_manager) override;
   void Close() override;
   void CloseNow() override;
@@ skipping 242 matching lines @@
   // Whether we currently are flashing our frame. This feature is implemented
   // by setting the urgency hint with the window manager, which can draw
   // attention to the window or completely ignore the hint. We stop flashing
   // the frame when |xwindow_| gains focus or handles a mouse button event.
   bool urgency_hint_set_;
 
   bool activatable_;
 
   base::CancelableCallback<void()> delayed_resize_task_;
 
+  scoped_ptr<aura::ScopedWindowTargeter> targeter_for_modal_;
+
+  XID modal_dialog_xid_;
+
   base::WeakPtrFactory<DesktopWindowTreeHostX11> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_