Add glue between the client and engine for Blimp

blimp/engine/browser/blimp_engine_session.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_ENGINE_BROWSER_BLIMP_ENGINE_SESSION_H_
 #define BLIMP_ENGINE_BROWSER_BLIMP_ENGINE_SESSION_H_
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "blimp/engine/browser/host_render_widget_message_processor.h"
 #include "blimp/net/blimp_message_processor.h"
 #include "content/public/browser/web_contents_delegate.h"
+#include "content/public/browser/web_contents_observer.h"
 #include "net/base/completion_callback.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace aura {
 class WindowTreeHost;
 
 namespace client {
 class DefaultCaptureClient;
 class WindowTreeClient;
 }  // namespace client
 }  // namespace aura
 
 namespace content {
 class BrowserContext;
+class RenderViewHost;
 class WebContents;
 }
 
+namespace gfx {
+class Size;
+}
+
 namespace wm {
 class FocusController;
 }
 
 namespace blimp {
 
 class BlimpConnection;
 class BlimpMessage;
 
 namespace engine {
 
 class BlimpBrowserContext;
 class BlimpFocusClient;
 class BlimpScreen;
 class BlimpUiContextFactory;
 class BlimpWindowTreeHost;
 
-class BlimpEngineSession : public BlimpMessageProcessor,
-                           public content::WebContentsDelegate {
+class BlimpEngineSession
+    : public BlimpMessageProcessor,
+      public content::WebContentsDelegate,
+      public content::WebContentsObserver,
+      public HostRenderWidgetMessageProcessor::RenderWidgetMessageDelegate {
  public:
   explicit BlimpEngineSession(scoped_ptr<BlimpBrowserContext> browser_context);
   ~BlimpEngineSession() override;
 
   void Initialize();
 
   BlimpBrowserContext* browser_context() { return browser_context_.get(); }
 
   // BlimpMessageProcessor implementation.
   // TODO(haibinlu): Delete this and move to BlimpMessageDemultiplexer.
   void ProcessMessage(scoped_ptr<BlimpMessage> message,
                       const net::CompletionCallback& callback) override;
 
  private:
   // ControlMessage handler methods.
   // Creates a new WebContents, which will be indexed by |target_tab_id|.
   void CreateWebContents(const int target_tab_id);
   void CloseWebContents(const int target_tab_id);
+  void HandleResize(const gfx::Size& size);
 
   // NavigationMessage handler methods.
   // Navigates the target tab to the |url|.
   void LoadUrl(const int target_tab_id, const GURL& url);
   void GoBack(const int target_tab_id);
   void GoForward(const int target_tab_id);
   void Reload(const int target_tab_id);
 
+  // RenderWidgetMessage handler methods.
+  // RenderWidgetMessageDelegate implementation.
+  void OnWebInputEvent(scoped_ptr<blink::WebInputEvent> event) override;
+  void OnCompositorMessageReceived(
+      const std::vector<uint8_t>& message) override;
+
   // content::WebContentsDelegate implementation.
   content::WebContents* OpenURLFromTab(
       content::WebContents* source,
       const content::OpenURLParams& params) override;
   void AddNewContents(content::WebContents* source,
                       content::WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
   void RequestToLockMouse(content::WebContents* web_contents,
                           bool user_gesture,
                           bool last_unlocked_by_target) override;
   void CloseContents(content::WebContents* source) override;
   void ActivateContents(content::WebContents* contents) override;
   void ForwardCompositorProto(const std::vector<uint8_t>& proto) override;
 
+  // content::WebContentsObserver implementation.
+  void RenderViewHostChanged(content::RenderViewHost* old_host,
+                             content::RenderViewHost* new_host) override;
+
   // Sets up and owns |new_contents|.
   void PlatformSetContents(scoped_ptr<content::WebContents> new_contents);
 
   scoped_ptr<BlimpBrowserContext> browser_context_;
   scoped_ptr<BlimpScreen> screen_;
 
   // Context factory for compositor.
   scoped_ptr<BlimpUiContextFactory> context_factory_;
 
   // Represents the (currently single) browser window into which tab(s) will
   // be rendered.
   scoped_ptr<aura::WindowTreeHost> window_tree_host_;
 
   // Used to apply standard focus conventions to the windows in the
   // WindowTreeHost hierarchy.
   scoped_ptr<wm::FocusController> focus_client_;
 
   // Used to manage input capture.
   scoped_ptr<aura::client::DefaultCaptureClient> capture_client_;
 
   // Only one web_contents is supported for blimp 0.5
   scoped_ptr<content::WebContents> web_contents_;
 
   // Currently attached client connection.
   scoped_ptr<BlimpConnection> client_connection_;
 
+  // The bridge to the network layer that does the RenderWidget proto/id work.
+  // TODO(dtrainor, haibinlu): Move this to a higher level once we start dealing
+  // with multiple tabs.
+  HostRenderWidgetMessageProcessor render_widget_processor_;
+
   DISALLOW_COPY_AND_ASSIGN(BlimpEngineSession);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_BROWSER_BLIMP_ENGINE_SESSION_H_