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// Copyright (c) 2013 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 "chrome/browser/extensions/extension_renderer_state.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/sessions/session_tab_helper.h"
#include "chrome/browser/tab_contents/retargeting_details.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/resource_request_info.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/process_type.h"
using content::BrowserThread;
using content::RenderProcessHost;
using content::RenderViewHost;
using content::WebContents;
//
// ExtensionRendererState::RenderViewHostObserver
//
class ExtensionRendererState::RenderViewHostObserver
: public content::WebContentsObserver {
public:
RenderViewHostObserver(RenderViewHost* host, WebContents* web_contents)
: content::WebContentsObserver(web_contents),
render_view_host_(host) {
}
void RenderViewDeleted(content::RenderViewHost* host) override {
if (host != render_view_host_)
return;
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(
&ExtensionRendererState::ClearTabAndWindowId,
base::Unretained(ExtensionRendererState::GetInstance()),
host->GetProcess()->GetID(), host->GetRoutingID()));
delete this;
}
private:
RenderViewHost* render_view_host_;
DISALLOW_COPY_AND_ASSIGN(RenderViewHostObserver);
};
//
// ExtensionRendererState::TabObserver
//
// This class listens for notifications about changes in renderer state on the
// UI thread, and notifies the ExtensionRendererState on the IO thread. It
// should only ever be accessed on the UI thread.
class ExtensionRendererState::TabObserver
: public content::NotificationObserver {
public:
TabObserver();
~TabObserver() override;
private:
// content::NotificationObserver interface.
void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
content::NotificationRegistrar registrar_;
};
ExtensionRendererState::TabObserver::TabObserver() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
registrar_.Add(this,
content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
content::NotificationService::AllBrowserContextsAndSources());
registrar_.Add(this, chrome::NOTIFICATION_TAB_PARENTED,
content::NotificationService::AllBrowserContextsAndSources());
registrar_.Add(this, chrome::NOTIFICATION_RETARGETING,
content::NotificationService::AllBrowserContextsAndSources());
}
ExtensionRendererState::TabObserver::~TabObserver() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
void ExtensionRendererState::TabObserver::Observe(
int type, const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case content::NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED: {
WebContents* web_contents = content::Source<WebContents>(source).ptr();
SessionTabHelper* session_tab_helper =
SessionTabHelper::FromWebContents(web_contents);
if (!session_tab_helper)
return;
RenderViewHost* host = content::Details<RenderViewHost>(details).ptr();
// TODO(mpcomplete): How can we tell if window_id is bogus? It may not
// have been set yet.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(
&ExtensionRendererState::SetTabAndWindowId,
base::Unretained(ExtensionRendererState::GetInstance()),
host->GetProcess()->GetID(), host->GetRoutingID(),
session_tab_helper->session_id().id(),
session_tab_helper->window_id().id()));
// The observer deletes itself.
new ExtensionRendererState::RenderViewHostObserver(host, web_contents);
break;
}
case chrome::NOTIFICATION_TAB_PARENTED: {
WebContents* web_contents = content::Source<WebContents>(source).ptr();
SessionTabHelper* session_tab_helper =
SessionTabHelper::FromWebContents(web_contents);
if (!session_tab_helper)
return;
RenderViewHost* host = web_contents->GetRenderViewHost();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(
&ExtensionRendererState::SetTabAndWindowId,
base::Unretained(ExtensionRendererState::GetInstance()),
host->GetProcess()->GetID(), host->GetRoutingID(),
session_tab_helper->session_id().id(),
session_tab_helper->window_id().id()));
break;
}
case chrome::NOTIFICATION_RETARGETING: {
RetargetingDetails* retargeting_details =
content::Details<RetargetingDetails>(details).ptr();
WebContents* web_contents = retargeting_details->target_web_contents;
SessionTabHelper* session_tab_helper =
SessionTabHelper::FromWebContents(web_contents);
if (!session_tab_helper)
return;
RenderViewHost* host = web_contents->GetRenderViewHost();
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(
&ExtensionRendererState::SetTabAndWindowId,
base::Unretained(ExtensionRendererState::GetInstance()),
host->GetProcess()->GetID(), host->GetRoutingID(),
session_tab_helper->session_id().id(),
session_tab_helper->window_id().id()));
break;
}
default:
NOTREACHED();
return;
}
}
//
// ExtensionRendererState
//
ExtensionRendererState::ExtensionRendererState() : observer_(NULL) {
}
ExtensionRendererState::~ExtensionRendererState() {
}
// static
ExtensionRendererState* ExtensionRendererState::GetInstance() {
return Singleton<ExtensionRendererState>::get();
}
void ExtensionRendererState::Init() {
observer_ = new TabObserver;
}
void ExtensionRendererState::Shutdown() {
delete observer_;
}
void ExtensionRendererState::SetTabAndWindowId(
int render_process_host_id, int routing_id, int tab_id, int window_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
RenderId render_id(render_process_host_id, routing_id);
map_[render_id] = TabAndWindowId(tab_id, window_id);
}
void ExtensionRendererState::ClearTabAndWindowId(
int render_process_host_id, int routing_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
RenderId render_id(render_process_host_id, routing_id);
map_.erase(render_id);
}
bool ExtensionRendererState::GetTabAndWindowId(
const content::ResourceRequestInfo* info, int* tab_id, int* window_id) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
int render_process_id;
if (info->GetProcessType() == content::PROCESS_TYPE_PLUGIN) {
render_process_id = info->GetOriginPID();
} else {
render_process_id = info->GetChildID();
}
int render_view_id = info->GetRouteID();
RenderId render_id(render_process_id, render_view_id);
TabAndWindowIdMap::iterator iter = map_.find(render_id);
if (iter != map_.end()) {
*tab_id = iter->second.first;
*window_id = iter->second.second;
return true;
}
return false;
}
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