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mojo/services/view_manager/display_manager.h

+// Copyright 2014 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 SERVICES_VIEW_MANAGER_DISPLAY_MANAGER_H_
+#define SERVICES_VIEW_MANAGER_DISPLAY_MANAGER_H_
+
+#include <map>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
+#include "mojo/public/cpp/bindings/callback.h"
+#include "third_party/mojo_services/src/native_viewport/public/interfaces/native_viewport.mojom.h"
+#include "third_party/mojo_services/src/surfaces/public/interfaces/display.mojom.h"
+#include "third_party/mojo_services/src/view_manager/public/interfaces/view_manager.mojom.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace cc {
+class SurfaceIdAllocator;
+}
+
+namespace mojo {
+class ApplicationConnection;
+class ApplicationImpl;
+}
+
+namespace view_manager {
+
+class ConnectionManager;
+class ServerView;
+
+// DisplayManager is used to connect the root ServerView to a display.
+class DisplayManager {
+ public:
+  virtual ~DisplayManager() {}
+
+  virtual void Init(ConnectionManager* connection_manager) = 0;
+
+  // Schedules a paint for the specified region in the coordinates of |view|.
+  virtual void SchedulePaint(const ServerView* view,
+                             const gfx::Rect& bounds) = 0;
+
+  virtual void SetViewportSize(const gfx::Size& size) = 0;
+
+  virtual const mojo::ViewportMetrics& GetViewportMetrics() = 0;
+};
+
+// DisplayManager implementation that connects to the services necessary to
+// actually display.
+class DefaultDisplayManager : public DisplayManager,
+                              public mojo::ErrorHandler {
+ public:
+  DefaultDisplayManager(
+      mojo::ApplicationImpl* app_impl,
+      mojo::ApplicationConnection* app_connection,
+      const mojo::Callback<void()>& native_viewport_closed_callback);
+  ~DefaultDisplayManager() override;
+
+  // DisplayManager:
+  void Init(ConnectionManager* connection_manager) override;
+  void SchedulePaint(const ServerView* view, const gfx::Rect& bounds) override;
+  void SetViewportSize(const gfx::Size& size) override;
+  const mojo::ViewportMetrics& GetViewportMetrics() override;
+
+ private:
+  void WantToDraw();
+  void Draw();
+  void DidDraw();
+
+  void OnMetricsChanged(mojo::ViewportMetricsPtr metrics);
+
+  // ErrorHandler:
+  void OnConnectionError() override;
+
+  mojo::ApplicationImpl* app_impl_;
+  mojo::ApplicationConnection* app_connection_;
+  ConnectionManager* connection_manager_;
+
+  mojo::ViewportMetrics metrics_;
+  gfx::Rect dirty_rect_;
+  base::Timer draw_timer_;
+  bool frame_pending_;
+
+  mojo::DisplayPtr display_;
+  mojo::NativeViewportPtr native_viewport_;
+  mojo::Callback<void()> native_viewport_closed_callback_;
+  base::WeakPtrFactory<DefaultDisplayManager> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DefaultDisplayManager);
+};
+
+}  // namespace view_manager
+
+#endif  // SERVICES_VIEW_MANAGER_DISPLAY_MANAGER_H_