components/view_manager/view_tree_host_impl.h

   1 // Copyright 2015 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 COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_IMPL_H_
   6 #define COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_IMPL_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "components/view_manager/display_manager.h"
  10 #include "components/view_manager/event_dispatcher.h"
  11 #include "components/view_manager/focus_controller_delegate.h"
  12 #include "components/view_manager/public/cpp/types.h"
  13 #include "components/view_manager/public/interfaces/view_tree_host.mojom.h"
  14 #include "components/view_manager/server_view.h"
  15
  16 namespace cc {
  17 class SurfaceManager;
  18 }
  19
  20 namespace surfaces {
  21 class SurfacesScheduler;
  22 }
  23
  24 namespace view_manager {
  25
  26 class ConnectionManager;
  27 class FocusController;
  28 class ViewTreeHostDelegate;
  29 class ViewTreeImpl;
  30
  31 // ViewTreeHostImpl is an implementation of the ViewTreeHost interface.
  32 // It serves as a top level root view for a window. Its lifetime is managed by
  33 // ConnectionManager. If the connection to the client breaks or if the user
  34 // closes the associated window, then this object and related state will be
  35 // deleted.
  36 class ViewTreeHostImpl : public DisplayManagerDelegate,
  37                          public mojo::ViewTreeHost,
  38                          public FocusControllerDelegate {
  39  public:
  40   // TODO(fsamuel): All these parameters are just plumbing for creating
  41   // DisplayManagers. We should probably just store these common parameters
  42   // in the DisplayManagerFactory and pass them along on DisplayManager::Create.
  43    ViewTreeHostImpl(
  44       mojo::ViewTreeHostClientPtr client,
  45       ConnectionManager* connection_manager,
  46       bool is_headless,
  47       mojo::ApplicationImpl* app_impl,
  48       const scoped_refptr<gles2::GpuState>& gpu_state,
  49       const scoped_refptr<surfaces::SurfacesState>& surfaces_state);
  50    ~ViewTreeHostImpl() override;
  51
  52   // Initializes state that depends on the existence of a ViewTreeHostImpl.
  53   void Init(ViewTreeHostDelegate* delegate);
  54
  55   ViewTreeImpl* GetViewTree();
  56
  57   mojo::ViewTreeHostClient* client() const { return client_.get(); }
  58
  59   // Returns whether |view| is a descendant of this root but not itself a
  60   // root view.
  61   bool IsViewAttachedToRoot(const ServerView* view) const;
  62
  63   // Schedules a paint for the specified region in the coordinates of |view| if
  64   // the |view| is in this viewport. Returns whether |view| is in the viewport.
  65   bool SchedulePaintIfInViewport(const ServerView* view,
  66                                  const gfx::Rect& bounds);
  67
  68   // Returns the metrics for this viewport.
  69   const mojo::ViewportMetrics& GetViewportMetrics() const;
  70
  71   ConnectionManager* connection_manager() { return connection_manager_; }
  72
  73   // Returns the root ServerView of this viewport.
  74   ServerView* root_view() { return root_.get(); }
  75   const ServerView* root_view() const { return root_.get(); }
  76
  77   void SetFocusedView(ServerView* view);
  78   ServerView* GetFocusedView();
  79   void DestroyFocusController();
  80
  81   void UpdateTextInputState(ServerView* view, const ui::TextInputState& state);
  82   void SetImeVisibility(ServerView* view, bool visible);
  83
  84   void OnAccelerator(uint32_t accelerator_id, mojo::EventPtr event);
  85   void DispatchInputEventToView(const ServerView* target, mojo::EventPtr event);
  86
  87   // ViewTreeHost:
  88   void SetSize(mojo::SizePtr size) override;
  89   void SetTitle(const mojo::String& title) override;
  90   void AddAccelerator(uint32_t id,
  91                       mojo::KeyboardCode keyboard_code,
  92                       mojo::EventFlags flags) override;
  93   void RemoveAccelerator(uint32_t id) override;
  94
  95  private:
  96   void OnClientClosed();
  97
  98   // DisplayManagerDelegate:
  99   ServerView* GetRootView() override;
 100   void OnEvent(mojo::EventPtr event) override;
 101   void OnDisplayClosed() override;
 102   void OnViewportMetricsChanged(
 103       const mojo::ViewportMetrics& old_metrics,
 104       const mojo::ViewportMetrics& new_metrics) override;
 105
 106   // FocusControllerDelegate:
 107   void OnFocusChanged(ServerView* old_focused_view,
 108                       ServerView* new_focused_view) override;
 109
 110   ViewTreeHostDelegate* delegate_;
 111   ConnectionManager* const connection_manager_;
 112   mojo::ViewTreeHostClientPtr client_;
 113   EventDispatcher event_dispatcher_;
 114   scoped_ptr<ServerView> root_;
 115   scoped_ptr<DisplayManager> display_manager_;
 116   scoped_ptr<FocusController> focus_controller_;
 117
 118   DISALLOW_COPY_AND_ASSIGN(ViewTreeHostImpl);
 119 };
 120
 121 }  // namespace view_manager
 122
 123 #endif  // COMPONENTS_VIEW_MANAGER_VIEW_TREE_HOST_IMPL_H_