ui/views/widget/desktop_aura/x11_topmost_window_finder.h

   1 // Copyright 2014 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_TOPMOST_WINDOW_FINDER_H_
   6 #define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_TOPMOST_WINDOW_FINDER_H_
   7
   8 #include <set>
   9
  10 #include "ui/base/x/x11_util.h"
  11 #include "ui/gfx/geometry/point.h"
  12 #include "ui/views/views_export.h"
  13
  14 namespace aura {
  15 class Window;
  16 }
  17
  18 namespace views {
  19
  20 // Utility class for finding the topmost window at a given screen position.
  21 class VIEWS_EXPORT X11TopmostWindowFinder
  22     : public ui::EnumerateWindowsDelegate {
  23  public:
  24   X11TopmostWindowFinder();
  25   ~X11TopmostWindowFinder() override;
  26
  27   // Returns the topmost window at |screen_loc_in_pixels|, ignoring the windows
  28   // in |ignore|. Returns NULL if the topmost window at |screen_loc_in_pixels|
  29   // does not belong to Chrome.
  30   aura::Window* FindLocalProcessWindowAt(const gfx::Point& screen_loc_in_pixels,
  31                                          const std::set<aura::Window*>& ignore);
  32
  33   // Returns the topmost window at |screen_loc_in_pixels|.
  34   XID FindWindowAt(const gfx::Point& screen_loc_in_pixels);
  35
  36  private:
  37   // ui::EnumerateWindowsDelegate:
  38   bool ShouldStopIterating(XID xid) override;
  39
  40   // Returns true if |window| does not not belong to |ignore|, is visible and
  41   // contains |screen_loc_|.
  42   bool ShouldStopIteratingAtLocalProcessWindow(aura::Window* window);
  43
  44   gfx::Point screen_loc_in_pixels_;
  45   std::set<aura::Window*> ignore_;
  46   XID toplevel_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(X11TopmostWindowFinder);
  49 };
  50
  51 }  // namespace
  52
  53 #endif  // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_TOPMOST_WINDOW_FINDER_H_