Browser side implementation of browser plugin

content/browser/browser_plugin/guest_render_view_host_observer.cc

+// 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.
+
+#include "content/browser/browser_plugin/guest_render_view_host_observer.h"
+
+#include "content/browser/browser_plugin/renderer_host/browser_plugin_message_filter.h"
+#include "content/common/view_messages.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/browser/render_view_host_observer.h"
+#include "content/public/browser/render_widget_host_view.h"
+#include "ppapi/proxy/ppapi_messages.h"
+
+GuestRenderViewHostObserver::~GuestRenderViewHostObserver() {
+}
+
+// static
+GuestRenderViewHostObserver* GuestRenderViewHostObserver::Create(
+    BrowserPluginMessageFilter* filter,
+    content::RenderViewHost* render_view_host,
+    int host_routing_id,
+    int instance_id) {
+  return new GuestRenderViewHostObserver(filter,
+                                         render_view_host,
+                                         host_routing_id,
+                                         instance_id);
+}
+
+GuestRenderViewHostObserver::GuestRenderViewHostObserver(
+    BrowserPluginMessageFilter* filter,
+    content::RenderViewHost* render_view_host,
+    int host_routing_id,
+    int instance_id)
+    : RenderViewHostObserver(render_view_host),
+      filter_(filter),
+      host_routing_id_(host_routing_id),
+      instance_id_(instance_id) {
+}
+
+bool GuestRenderViewHostObserver::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(GuestRenderViewHostObserver, msg)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_ChannelCreated,
+                        OnRendererPluginChannelCreated)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_ResizeGuest, OnMsgResizeGuest)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnMsgRenderViewReady)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+
+  return handled;
+}
+
+// Called when a new plugin <--> renderer channel has been created.
+void GuestRenderViewHostObserver::OnRendererPluginChannelCreated(
+    const IPC::ChannelHandle& channel_handle) {
+  // Prepare the handle to send to the renderer.
+  base::ProcessHandle plugin_process =
+      render_view_host()->GetProcess()->GetHandle();
+#if defined(OS_WIN)
+  base::ProcessHandle renderer_process = filter_->peer_handle();
+  int renderer_id = filter_->render_process_id();
+
+  base::ProcessHandle renderers_plugin_handle = NULL;
+  ::DuplicateHandle(::GetCurrentProcess(), plugin_process,
+                    renderer_process, &renderers_plugin_handle,
+                    0, FALSE, DUPLICATE_SAME_ACCESS);
+#elif defined(OS_POSIX)
+  // Don't need to duplicate anything on POSIX since it's just a PID.
+  base::ProcessHandle renderers_plugin_handle = plugin_process;
+#endif
+  // Tell the browser loading placeholder that we're done.
+  // and that it can begin using the guest renderer.
+  filter_->Send(
+      new ViewMsg_GuestReady(host_routing_id_,
+                             instance_id_,
+                             renderers_plugin_handle,
+                             channel_handle));
+}
+
+void GuestRenderViewHostObserver::OnMsgRenderViewReady() {
+  // The renderer is now ready to receive ppapi messages.
+  // Let's tell it create a channel with the embedder/host.
+  PpapiMsg_CreateChannel* msg =
+      new PpapiMsg_CreateChannel(filter_->peer_handle(),
+                                 filter_->render_process_id());
+  msg->set_routing_id(render_view_host()->GetRoutingID());
+  msg->set_unblock(true);
+  // TODO(fsamuel): If we aren't able to successfully send this message
+  // to the guest then that probably means it crashed. Is there anything
+  // we can do that's cleaner than failing a check?
+  CHECK(Send(msg));
+}
+
+void GuestRenderViewHostObserver::OnMsgResizeGuest(int width, int height) {
+  // Tell the RenderWidgetHostView to adjust its size.
+  render_view_host()->GetView()->SetSize(gfx::Size(width, height));
+}
+