blimp: Move compositing, input and render widget feature to client/core.

blimp/client/feature/render_widget_feature.h

-// Copyright 2015 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 BLIMP_CLIENT_FEATURE_RENDER_WIDGET_FEATURE_H_
-#define BLIMP_CLIENT_FEATURE_RENDER_WIDGET_FEATURE_H_
-
-#include <stdint.h>
-
-#include <map>
-#include <memory>
-
-#include "base/containers/small_map.h"
-#include "base/macros.h"
-#include "blimp/net/blimp_message_processor.h"
-#include "blimp/net/input_message_generator.h"
-
-namespace blink {
-class WebGestureEvent;
-}
-
-namespace cc {
-namespace proto {
-class CompositorMessage;
-}
-}
-
-namespace blimp {
-class RenderWidgetMessage;
-class CompositorMessage;
-
-namespace client {
-
-// Handles all incoming and outgoing protobuf message types tied to a specific
-// RenderWidget. This includes BlimpMessage::INPUT, BlimpMessage::COMPOSITOR,
-// and BlimpMessage::RENDER_WIDGET messages.  Delegates can be added to be
-// notified of incoming messages. This class automatically attaches a specific
-// id so that the engine can drop stale RenderWidget related messages after it
-// sends a RenderWidgetMessage::INITIALIZE message.
-class RenderWidgetFeature : public BlimpMessageProcessor {
- public:
-  // A delegate to be notified of specific RenderWidget related incoming events.
-  class RenderWidgetFeatureDelegate {
-   public:
-    virtual ~RenderWidgetFeatureDelegate() {}
-    virtual void OnRenderWidgetCreated(int render_widget_id) = 0;
-
-    // Called when the engine's RenderWidget has changed for a particular
-    // WebContents.  When this is received all state related to the existing
-    // client RenderWidget should be reset.
-    virtual void OnRenderWidgetInitialized(int render_widget_id) = 0;
-
-    virtual void OnRenderWidgetDeleted(int render_widget_id) = 0;
-
-    // Called when the engine sent a CompositorMessage.  These messages should
-    // be sent to the client's RemoteChannel of the compositor.
-    virtual void OnCompositorMessageReceived(
-        int render_widget_id,
-        std::unique_ptr<cc::proto::CompositorMessage> message) = 0;
-  };
-
-  RenderWidgetFeature();
-  ~RenderWidgetFeature() override;
-
-  // Set the BlimpMessageProcessor that will be used to send BlimpMessage::INPUT
-  // messages to the engine.
-  void set_outgoing_input_message_processor(
-      std::unique_ptr<BlimpMessageProcessor> processor);
-
-  // Set the BlimpMessageProcessor that will be used to send
-  // BlimpMessage::COMPOSITOR messages to the engine.
-  void set_outgoing_compositor_message_processor(
-      std::unique_ptr<BlimpMessageProcessor> processor);
-
-  // Sends a WebGestureEvent for |tab_id| to the engine.
-  void SendWebGestureEvent(const int tab_id,
-                           const int render_widget_id,
-                           const blink::WebGestureEvent& event);
-
-  // Sends a CompositorMessage for |tab_id| to the engine.
-  void SendCompositorMessage(const int tab_id,
-                             const int render_widget_id,
-                             const cc::proto::CompositorMessage& message);
-
-  // Sets a RenderWidgetMessageDelegate to be notified of all incoming
-  // RenderWidget related messages for |tab_id| from the engine.  There can only
-  // be one RenderWidgetMessageDelegate per tab.
-  // virtual for testing.
-  virtual void SetDelegate(int tab_id, RenderWidgetFeatureDelegate* delegate);
-  virtual void RemoveDelegate(const int tab_id);
-
-  // BlimpMessageProcessor implementation.
-  void ProcessMessage(std::unique_ptr<BlimpMessage> message,
-                      const net::CompletionCallback& callback) override;
-
- private:
-  void ProcessRenderWidgetMessage(
-      RenderWidgetFeatureDelegate* delegate,
-      const RenderWidgetMessage& message);
-
-  void ProcessCompositorMessage(RenderWidgetFeatureDelegate* delegate,
-                                const CompositorMessage& message);
-
-  // Returns nullptr if no delegate is found.
-  RenderWidgetFeatureDelegate* FindDelegate(const int tab_id);
-
-  typedef base::SmallMap<std::map<int, RenderWidgetFeatureDelegate*>>
-      DelegateMap;
-
-  DelegateMap delegates_;
-
-  InputMessageGenerator input_message_generator_;
-
-  // Used to send BlimpMessage::INPUT type messages to the engine.
-  std::unique_ptr<BlimpMessageProcessor> outgoing_input_message_processor_;
-
-  // Used to send BlimpMessage::COMPOSITOR messages to the engine.
-  std::unique_ptr<BlimpMessageProcessor> outgoing_compositor_message_processor_;
-
-  DISALLOW_COPY_AND_ASSIGN(RenderWidgetFeature);
-};
-
-}  // namespace client
-}  // namespace blimp
-
-#endif  // BLIMP_CLIENT_FEATURE_RENDER_WIDGET_FEATURE_H_