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 15 matching lines @@
 class VIEWS_EXPORT DesktopWindowTreeHostX11
     : public DesktopWindowTreeHost,
       public aura::WindowTreeHost,
       public ui::PlatformEventDispatcher {
  public:
   DesktopWindowTreeHostX11(
       internal::NativeWidgetDelegate* native_widget_delegate,
       DesktopNativeWidgetAura* desktop_native_widget_aura);
   ~DesktopWindowTreeHostX11() override;
 
+  class ScopedHandle {
+   public:
+    explicit ScopedHandle(const base::Closure& destroy_callback);
+    ~ScopedHandle();
+    void CancelCallback();
+
+   private:
+    base::Closure destroy_callback_;
+    DISALLOW_COPY_AND_ASSIGN(ScopedHandle);
+  };
+
   // A way of converting an X11 |xid| host window into a |content_window_|.
   static aura::Window* GetContentWindowForXID(XID xid);
 
   // A way of converting an X11 |xid| host window into this object.
   static DesktopWindowTreeHostX11* GetHostForXID(XID xid);
 
   // Get all open top-level windows. This includes windows that may not be
   // visible. This list is sorted in their stacking order, i.e. the first window
   // is the topmost window.
   static std::vector<aura::Window*> GetAllOpenWindows();
@@ skipping 16 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(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<ScopedHandle> 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 140 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_;
 
   // The native root window.
   ::Window x_root_window_;
 
   ui::X11AtomCache atom_cache_;
 
@@ skipping 82 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_;
 
+  std::unique_ptr<aura::ScopedWindowTargeter> targeter_for_modal_;
+
+  XID modal_dialog_xid_;
+
+  ScopedHandle* scoped_handle_;
+
   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_