extensions/shell/browser/shell_screen.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 EXTENSIONS_SHELL_BROWSER_SHELL_SCREEN_H_
   6 #define EXTENSIONS_SHELL_BROWSER_SHELL_SCREEN_H_
   7
   8 #include "base/macros.h"
   9 #include "ui/aura/window_observer.h"
  10 #include "ui/gfx/display.h"
  11 #include "ui/gfx/screen.h"
  12
  13 namespace aura {
  14 class WindowTreeHost;
  15 }
  16
  17 namespace gfx {
  18 class Size;
  19 }
  20
  21 namespace extensions {
  22
  23 // A minimal Aura implementation of a screen. Scale factor is locked at 1.0.
  24 // When running on a Linux desktop resizing the main window resizes the screen.
  25 class ShellScreen : public gfx::Screen, public aura::WindowObserver {
  26  public:
  27   // Creates a screen occupying |size| physical pixels.
  28   explicit ShellScreen(const gfx::Size& size);
  29   ~ShellScreen() override;
  30
  31   // Caller owns the returned object.
  32   aura::WindowTreeHost* CreateHostForPrimaryDisplay();
  33
  34   // WindowObserver overrides:
  35   void OnWindowBoundsChanged(aura::Window* window,
  36                              const gfx::Rect& old_bounds,
  37                              const gfx::Rect& new_bounds) override;
  38   void OnWindowDestroying(aura::Window* window) override;
  39
  40   // gfx::Screen overrides:
  41   gfx::Point GetCursorScreenPoint() override;
  42   gfx::NativeWindow GetWindowUnderCursor() override;
  43   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;
  44   int GetNumDisplays() const override;
  45   std::vector<gfx::Display> GetAllDisplays() const override;
  46   gfx::Display GetDisplayNearestWindow(gfx::NativeView view) const override;
  47   gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const override;
  48   gfx::Display GetDisplayMatching(const gfx::Rect& match_rect) const override;
  49   gfx::Display GetPrimaryDisplay() const override;
  50   void AddObserver(gfx::DisplayObserver* observer) override;
  51   void RemoveObserver(gfx::DisplayObserver* observer) override;
  52
  53  private:
  54   aura::WindowTreeHost* host_;  // Not owned.
  55   gfx::Display display_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(ShellScreen);
  58 };
  59
  60 }  // namespace extensions
  61
  62 #endif  // EXTENSIONS_SHELL_BROWSER_SHELL_SCREEN_H_