Browser Plugin: Removed BrowserPluginWebContentsObserver (to be replaced by rewritten BrowserPlugi…

content/browser/browser_plugin/browser_plugin_web_contents_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/browser_plugin_web_contents_observer.h"
-
-#include "base/lazy_instance.h"
-#include "content/browser/renderer_host/render_view_host_impl.h"
-#include "content/browser/web_contents/web_contents_impl.h"
-#include "content/common/browser_plugin_messages.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_details.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/render_process_host.h"
-#include "content/public/browser/render_widget_host.h"
-#include "content/public/browser/render_widget_host_view.h"
-#include "content/public/browser/render_view_host.h"
-#include "content/public/browser/site_instance.h"
-#include "content/public/browser/web_contents.h"
-#include "ppapi/proxy/ppapi_messages.h"
-
-namespace content {
-
-BrowserPluginWebContentsObserver::BrowserPluginWebContentsObserver(
-    WebContentsImpl* web_contents)
-    : WebContentsObserver(web_contents),
-      host_(NULL),
-      instance_id_(0) {
-  registrar_.Add(this,
-                 NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
-                 Source<RenderViewHost>(
-                    web_contents->GetRenderViewHost()));
-}
-
-BrowserPluginWebContentsObserver::~BrowserPluginWebContentsObserver() {
-}
-
-bool BrowserPluginWebContentsObserver::OnMessageReceived(
-    const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(BrowserPluginWebContentsObserver, message)
-    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_ChannelCreated,
-                        OnRendererPluginChannelCreated)
-    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_OpenChannel,
-                        OnOpenChannelToBrowserPlugin)
-    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_GuestReady, OnGuestReady)
-    IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_ResizeGuest, OnResizeGuest)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void BrowserPluginWebContentsObserver::OnGuestReady() {
-  // We only care about handling this message on guests.
-  if (!host())
-    return;
-
-  // The renderer is now ready to receive ppapi messages.
-  // Let's tell it create a channel with the embedder/host.
-  BrowserPluginMsg_CreateChannel* msg =
-      new BrowserPluginMsg_CreateChannel(
-          host()->GetRenderProcessHost()->GetHandle(),
-          host()->GetRenderProcessHost()->GetID());
-  msg->set_routing_id(web_contents()->GetRenderViewHost()->GetRoutingID());
-  // 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 BrowserPluginWebContentsObserver::OnResizeGuest(
-    int width, int height) {
-  // Tell the RenderWidgetHostView to adjust its size.
-  web_contents()->GetRenderViewHost()->GetView()->SetSize(
-      gfx::Size(width, height));
-}
-
-void BrowserPluginWebContentsObserver::OnOpenChannelToBrowserPlugin(
-    int instance_id,
-    long long frame_id,
-    const std::string& src,
-    const gfx::Size& size) {
-  BrowserContext* browser_context =
-      web_contents()->GetRenderViewHost()->GetProcess()->GetBrowserContext();
-  DCHECK(browser_context);
-
-  GURL url(src);
-  SiteInstance* site_instance =
-      SiteInstance::CreateForURL(
-          browser_context, url);
-  WebContentsImpl* guest_web_contents =
-      static_cast<WebContentsImpl*>(
-          WebContents::Create(
-              browser_context,
-              site_instance,
-              MSG_ROUTING_NONE,
-              NULL, // base WebContents
-              NULL  // session storage namespace
-          ));
-  // TODO(fsamuel): Set the WebContentsDelegate here.
-  RenderViewHostImpl* guest_render_view_host =
-      static_cast<RenderViewHostImpl*>(
-          guest_web_contents->GetRenderViewHost());
-
-  // We need to make sure that the RenderViewHost knows that it's
-  // hosting a guest RenderView so that it informs the RenderView
-  // on a ViewMsg_New. Guest RenderViews will avoid compositing
-  // until a guest-to-host channel has been initialized.
-  guest_render_view_host->set_guest(true);
-
-  guest_web_contents->GetController().LoadURL(
-      url,
-      Referrer(),
-      PAGE_TRANSITION_HOME_PAGE,
-      std::string());
-
-  guest_render_view_host->GetView()->SetSize(size);
-  BrowserPluginWebContentsObserver* guest_observer =
-      guest_web_contents->browser_plugin_web_contents_observer();
-  guest_observer->set_host(static_cast<WebContentsImpl*>(web_contents()));
-  guest_observer->set_instance_id(instance_id);
-
-  AddGuest(guest_web_contents, frame_id);
-}
-
-void BrowserPluginWebContentsObserver::OnRendererPluginChannelCreated(
-    const IPC::ChannelHandle& channel_handle) {
-  DCHECK(host());
-  // Prepare the handle to send to the renderer.
-  base::ProcessHandle plugin_process =
-      web_contents()->GetRenderProcessHost()->GetHandle();
-#if defined(OS_WIN)
-  base::ProcessHandle renderer_process =
-      host()->GetRenderProcessHost()->GetHandle();
-  int renderer_id = host()->GetRenderProcessHost()->GetID();
-
-  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 BrowserPLuginPlaceholder in the host that we're done
-  // and that it can begin using the guest renderer.
-  host()->GetRenderProcessHost()->Send(
-      new BrowserPluginMsg_GuestReady_ACK(
-          host()->GetRenderViewHost()->GetRoutingID(),
-          instance_id(),
-          renderers_plugin_handle,
-          channel_handle));
-}
-
-void BrowserPluginWebContentsObserver::AddGuest(WebContentsImpl* guest,
-                                                int64 frame_id) {
-  guests_[guest] = frame_id;
-}
-
-void BrowserPluginWebContentsObserver::RemoveGuest(WebContentsImpl* guest) {
-  guests_.erase(guest);
-}
-
-void BrowserPluginWebContentsObserver::DestroyGuests() {
-  for (GuestMap::const_iterator it = guests_.begin();
-       it != guests_.end(); ++it) {
-    const WebContentsImpl* web_contents = it->first;
-    delete web_contents;
-  }
-  guests_.clear();
-}
-
-void BrowserPluginWebContentsObserver::DidCommitProvisionalLoadForFrame(
-    int64 frame_id,
-    bool is_main_frame,
-    const GURL& url,
-    PageTransition transition_type) {
-  typedef std::set<WebContentsImpl*> GuestSet;
-  GuestSet guests_to_delete;
-  for (GuestMap::const_iterator it = guests_.begin();
-       it != guests_.end(); ++it) {
-    WebContentsImpl* web_contents = it->first;
-    if (it->second == frame_id) {
-      guests_to_delete.insert(web_contents);
-    }
-  }
-  for (GuestSet::const_iterator it = guests_to_delete.begin();
-       it != guests_to_delete.end(); ++it) {
-    delete *it;
-    guests_.erase(*it);
-  }
-}
-
-void BrowserPluginWebContentsObserver::RenderViewDeleted(
-    RenderViewHost* render_view_host) {
-  DestroyGuests();
-}
-
-void BrowserPluginWebContentsObserver::RenderViewGone(
-    base::TerminationStatus status) {
-  DestroyGuests();
-}
-
-void BrowserPluginWebContentsObserver::WebContentsDestroyed(
-    WebContents* web_contents) {
-  DestroyGuests();
-}
-
-void BrowserPluginWebContentsObserver::Observe(
-    int type,
-    const NotificationSource& source,
-    const NotificationDetails& details) {
-  DCHECK(type == NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED);
-  bool visible = *Details<bool>(details).ptr();
-
-  // If the host is hidden we need to hide the guests as well.
-  for (GuestMap::const_iterator it = guests_.begin();
-       it != guests_.end(); ++it) {
-    WebContentsImpl* web_contents = it->first;
-    if (visible)
-      web_contents->ShowContents();
-    else
-      web_contents->HideContents();
-  }
-}
-
-}  // namespace content