Refactoring of new IPC-only pepper implementation

content/renderer/pepper/renderer_ppapi_host_impl.h

+// Copyright (c) 2012 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 CONTENT_RENDERER_PEPPER_RENDERER_PPAPI_HOST_IMPL_H_
+#define CONTENT_RENDERER_PEPPER_RENDERER_PPAPI_HOST_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "content/renderer/pepper/content_renderer_pepper_host_factory.h"
+#include "ppapi/host/ppapi_host.h"
+#include "webkit/plugins/ppapi/plugin_module.h"
+
+namespace IPC {
+class Sender;
+}
+
+namespace ppapi {
+
+namespace proxy {
+class HostDispatcher;
+}
+
+namespace thunk {
+class ResourceCreationAPI;
+}
+
+}  // namespace ppapi
+
+namespace webkit {
+namespace ppapi {
+class PluginInstance;
+class PluginModule;
+}
+}
+
+namespace content {
+
+class PepperInProcessRouter;
+
+// This class is attached to a PluginModule via the module's embedder state.
+// The plugin module manages our lifetime.
+class RendererPpapiHostImpl
+    : public RendererPpapiHost,
+      public webkit::ppapi::PluginModule::EmbedderState {
+ public:
+  virtual ~RendererPpapiHostImpl();
+
+  // Factory functions to create in process or out-of-process host impls. The
+  // host will be created and associated with the given module, which must not
+  // already have embedder state on it.
+  //
+  // The module will take ownership of the new host impl. The returned value
+  // does not pass ownership, it's just for the information of the caller.
+  static RendererPpapiHostImpl* CreateOnModuleForOutOfProcess(
+      webkit::ppapi::PluginModule* module,
+      ppapi::proxy::HostDispatcher* dispatcher,
+      const ppapi::PpapiPermissions& permissions);
+  static RendererPpapiHostImpl* CreateOnModuleForInProcess(
+      webkit::ppapi::PluginModule* module,
+      const ppapi::PpapiPermissions& permissions);
+
+  // Returns the router that we use for in-process IPC emulation (see the
+  // pepper_in_process_router.h for more). This will be NULL when the plugin
+  // is running out-of-process.
+  PepperInProcessRouter* in_process_router() {
+    return in_process_router_.get();
+  }
+
+  // Creates the in-process resource creation API wrapper for the given
+  // plugin instance. This object will reference the host impl, so the
+  // host impl should outlive the returned pointer. Since the resource
+  // creation object is associated with the instance, this will generally
+  // happen automatically.
+  scoped_ptr< ::ppapi::thunk::ResourceCreationAPI>
+      CreateInProcessResourceCreationAPI(
+          webkit::ppapi::PluginInstance* instance);
+
+  // RendererPpapiHost.
+  virtual ppapi::host::PpapiHost* GetPpapiHost() OVERRIDE;
+  virtual bool IsValidInstance(PP_Instance instance) const OVERRIDE;
+  virtual RenderView* GetRenderViewForInstance(
+      PP_Instance instance) const OVERRIDE;
+  virtual bool HasUserGesture(PP_Instance instance) const OVERRIDE;
+
+ private:
+  RendererPpapiHostImpl(webkit::ppapi::PluginModule* module,
+                        ppapi::proxy::HostDispatcher* dispatcher,
+                        const ppapi::PpapiPermissions& permissions);
+  RendererPpapiHostImpl(webkit::ppapi::PluginModule* module,
+                        const ppapi::PpapiPermissions& permissions);
+
+  // Retrieves the plugin instance object associated with the given PP_Instance
+  // and validates that it is one of the instances associated with our module.
+  // Returns NULL on failure.
+  //
+  // We use this to security check the PP_Instance values sent from a plugin to
+  // make sure it's not trying to spoof another instance.
+  webkit::ppapi::PluginInstance* GetAndValidateInstance(
+      PP_Instance instance) const;
+
+  webkit::ppapi::PluginModule* module_;  // Non-owning pointer.
+
+  ContentRendererPepperHostFactory host_factory_;
+  scoped_ptr<ppapi::host::PpapiHost> ppapi_host_;
+
+  // Null when running out-of-process.
+  scoped_ptr<PepperInProcessRouter> in_process_router_;
+
+  DISALLOW_COPY_AND_ASSIGN(RendererPpapiHostImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_PEPPER_RENDERER_PPAPI_HOST_IMPL_H_