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