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 48 matching lines @@
   void AddObserver(DesktopWindowTreeHostObserverX11* observer);
   void RemoveObserver(DesktopWindowTreeHostObserverX11* observer);
 
   // Swaps the current handler for events in the non client view with |handler|.
   void SwapNonClientEventHandler(std::unique_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.
+  std::unique_ptr<base::Closure> DisableEventListening(XID dialog);
+
+  // Returns XID of dialog currently displayed. When it returns 0,
+  // there is no dialog on the host window.
+  XID GetModalDialog();
+
  protected:
   // Overridden from DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
             const Widget::InitParams& params) override;
   void OnNativeWidgetCreated(const Widget::InitParams& params) override;
   std::unique_ptr<corewm::Tooltip> CreateTooltip() override;
   std::unique_ptr<aura::client::DragDropClient> CreateDragDropClient(
       DesktopNativeCursorManager* cursor_manager) override;
   void Close() override;
   void CloseNow() override;
@@ skipping 163 matching lines @@
   // ui::PlatformEventDispatcher:
   bool CanDispatchEvent(const ui::PlatformEvent& event) override;
   uint32_t DispatchEvent(const ui::PlatformEvent& event) override;
 
   void DelayedResize(const gfx::Size& size_in_pixels);
 
   gfx::Rect GetWorkAreaBoundsInPixels() const;
   gfx::Rect ToDIPRect(const gfx::Rect& rect_in_pixels) const;
   gfx::Rect ToPixelRect(const gfx::Rect& rect_in_dip) const;
 
+  // Enables event listening after closing |dialog|.
+  void EnableEventListening();
+
   // X11 things
   // The display and the native X window hosting the root window.
   XDisplay* xdisplay_;
   ::Window xwindow_;
 
   // Events selected on |xwindow_|.
   std::unique_ptr<ui::XScopedEventSelector> xwindow_events_;
 
   // The native root window.
   ::Window x_root_window_;
@@ skipping 126 matching lines @@
   bool ignore_keyboard_input_;
 
   // Used for tracking activation state in {Before|After}ActivationStateChanged.
   bool was_active_;
   bool had_pointer_;
   bool had_pointer_grab_;
   bool had_window_focus_;
 
   base::CancelableCallback<void()> delayed_resize_task_;
 
+  std::unique_ptr<aura::ScopedWindowTargeter> targeter_for_modal_;
+
+  XID modal_dialog_xid_;
+
   base::WeakPtrFactory<DesktopWindowTreeHostX11> close_widget_factory_;
+  base::WeakPtrFactory<DesktopWindowTreeHostX11> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostX11);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_DESKTOP_WINDOW_TREE_HOST_X11_H_