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// 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_host.h"
#include "content/browser/browser_plugin/browser_plugin_host_helper.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/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_view.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/web_contents_view.h"
#include "ppapi/proxy/ppapi_messages.h"
namespace content {
BrowserPluginHost::BrowserPluginHost(
WebContentsImpl* web_contents)
: WebContentsObserver(web_contents),
embedder_render_process_host_(NULL),
instance_id_(0) {
// Listen to visibility changes so that an embedder hides its guests
// as well.
registrar_.Add(this,
NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED,
Source<WebContents>(web_contents));
// Construct plumbing helpers when a new RenderViewHost is created for
// this BrowserPluginHost's WebContentsImpl.
registrar_.Add(this,
NOTIFICATION_RENDER_VIEW_HOST_CREATED_FOR_TAB,
Source<WebContents>(web_contents));
}
BrowserPluginHost::~BrowserPluginHost() {
}
BrowserPluginHost* BrowserPluginHost::GetGuestByContainerID(int container_id) {
ContainerInstanceMap::const_iterator it =
guests_by_container_id_.find(container_id);
if (it != guests_by_container_id_.end())
return it->second;
return NULL;
}
void BrowserPluginHost::RegisterContainerInstance(
int container_id,
BrowserPluginHost* observer) {
DCHECK(guests_by_container_id_.find(container_id) ==
guests_by_container_id_.end());
guests_by_container_id_[container_id] = observer;
}
bool BrowserPluginHost::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(BrowserPluginHost, message)
IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_NavigateFromGuest,
OnNavigateFromGuest)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void BrowserPluginHost::NavigateGuestFromEmbedder(
RenderViewHost* render_view_host,
int container_instance_id,
long long frame_id,
const std::string& src) {
BrowserPluginHost* guest_observer =
GetGuestByContainerID(container_instance_id);
WebContentsImpl* guest_web_contents =
guest_observer ?
static_cast<WebContentsImpl*>(guest_observer->web_contents()): NULL;
if (!guest_observer) {
guest_web_contents =
static_cast<WebContentsImpl*>(
WebContents::Create(
web_contents()->GetBrowserContext(),
render_view_host->GetSiteInstance(),
MSG_ROUTING_NONE,
NULL, // base WebContents
NULL // session storage namespace
));
guest_observer =
guest_web_contents->browser_plugin_host();
guest_observer->set_embedder_render_process_host(
render_view_host->GetProcess());
guest_observer->set_instance_id(container_instance_id);
RegisterContainerInstance(container_instance_id, guest_observer);
AddGuest(guest_web_contents, frame_id);
}
GURL url(src);
guest_observer->web_contents()->SetDelegate(guest_observer);
guest_observer->web_contents()->GetController().LoadURL(
url,
Referrer(),
PAGE_TRANSITION_AUTO_SUBFRAME,
std::string());
}
void BrowserPluginHost::OnNavigateFromGuest(
PP_Instance instance,
const std::string& src) {
DCHECK(embedder_render_process_host());
GURL url(src);
web_contents()->GetController().LoadURL(
url,
Referrer(),
PAGE_TRANSITION_AUTO_SUBFRAME,
std::string());
}
void BrowserPluginHost::ConnectEmbedderToChannel(
RenderViewHost* render_view_host,
const IPC::ChannelHandle& channel_handle) {
DCHECK(embedder_render_process_host());
// Tell the BrowserPlugin in the embedder that we're done and that it can
// begin using the guest renderer.
embedder_render_process_host()->Send(
new BrowserPluginMsg_LoadGuest(
instance_id(),
render_view_host->GetProcess()->
GetID(),
channel_handle));
}
void BrowserPluginHost::AddGuest(WebContentsImpl* guest, int64 frame_id) {
guests_[guest] = frame_id;
}
void BrowserPluginHost::RemoveGuest(WebContentsImpl* guest) {
guests_.erase(guest);
}
void BrowserPluginHost::DestroyGuests() {
for (GuestMap::const_iterator it = guests_.begin();
it != guests_.end(); ++it) {
WebContentsImpl* web_contents = it->first;
delete web_contents;
}
guests_.clear();
guests_by_container_id_.clear();
}
void BrowserPluginHost::DidCommitProvisionalLoadForFrame(
int64 frame_id,
bool is_main_frame,
const GURL& url,
PageTransition transition_type,
RenderViewHost* render_view_host) {
// Clean-up guests that lie in the frame that we're navigating.
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 BrowserPluginHost::RenderViewDeleted(RenderViewHost* render_view_host) {
// TODO(fsamuel): For some reason ToT hangs when killing a guest, this wasn't
// the case earlier. Presumably, when a guest is killed/crashes, one of
// RenderViewDeleted, RenderViewGone or WebContentsDestroyed will get called.
// At that point, we should remove reference to this BrowserPluginHost
// from its embedder, in addition to destroying its guests, to ensure
// that we do not attempt a double delete.
DestroyGuests();
}
void BrowserPluginHost::RenderViewGone(base::TerminationStatus status) {
DestroyGuests();
}
void BrowserPluginHost::WebContentsDestroyed(WebContents* web_contents) {
DestroyGuests();
}
void BrowserPluginHost::Observe(
int type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type) {
case NOTIFICATION_RENDER_VIEW_HOST_CREATED_FOR_TAB: {
RenderViewHost* render_view_host =
Details<RenderViewHost>(details).ptr();
// BrowserPluginHostHelper is destroyed when its associated RenderViewHost
// is destroyed.
new BrowserPluginHostHelper(this, render_view_host);
break;
}
case NOTIFICATION_WEB_CONTENTS_VISIBILITY_CHANGED: {
bool visible = *Details<bool>(details).ptr();
// If the embedder 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();
}
break;
}
default:
NOTREACHED() << "Unexpected notification type: " << type;
}
}
} // namespace content
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