content/renderer/java/java_bridge_dispatcher.h

   1 // Copyright (c) 2012 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 CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_
   6 #define CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_
   7
   8 #include <map>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "content/public/renderer/render_view_observer.h"
  12 #include "ipc/ipc_channel_handle.h"
  13 #include "third_party/npapi/bindings/npruntime.h"
  14
  15 namespace content {
  16 class JavaBridgeChannel;
  17 struct NPVariant_Param;
  18
  19 // This class handles injecting Java objects into the main frame of a
  20 // RenderView. The 'add' and 'remove' messages received from the browser
  21 // process modify the entries in a map of 'pending' objects. These objects are
  22 // bound to the window object of the main frame when that window object is next
  23 // cleared. These objects remain bound until the window object is cleared
  24 // again.
  25 class JavaBridgeDispatcher : public RenderViewObserver {
  26  public:
  27   JavaBridgeDispatcher(RenderView* render_view);
  28   virtual ~JavaBridgeDispatcher();
  29
  30  private:
  31   // RenderViewObserver override:
  32   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  33   virtual void DidClearWindowObject(WebKit::WebFrame* frame) OVERRIDE;
  34
  35   // Message handlers
  36   void OnAddNamedObject(const string16& name,
  37                         const NPVariant_Param& variant_param);
  38   void OnRemoveNamedObject(const string16& name);
  39
  40   bool EnsureChannelIsSetUp();
  41
  42   // Objects that will be bound to the window when the window object is next
  43   // cleared. We hold a ref to these.
  44   typedef std::map<string16, NPVariant> ObjectMap;
  45   ObjectMap objects_;
  46   scoped_refptr<JavaBridgeChannel> channel_;
  47 };
  48
  49 }  // namespace content
  50
  51 #endif  // CONTENT_RENDERER_JAVA_JAVA_BRIDGE_DISPATCHER_H_