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// Copyright (c) 2009 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_process_manager.h"
#include "chrome/browser/browsing_instance.h"
#include "chrome/browser/extensions/extension_host.h"
#include "chrome/browser/extensions/extensions_service.h"
#include "chrome/browser/profile.h"
#include "chrome/browser/renderer_host/site_instance.h"
#include "chrome/browser/renderer_host/render_view_host.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/notification_type.h"
#include "chrome/common/render_messages.h"
static void CreateBackgroundHost(
ExtensionProcessManager* manager, Extension* extension) {
// Start the process for the master page, if it exists.
if (extension->background_url().is_valid())
manager->CreateBackgroundHost(extension, extension->background_url());
}
static void CreateBackgroundHosts(
ExtensionProcessManager* manager, const ExtensionList* extensions) {
for (ExtensionList::const_iterator extension = extensions->begin();
extension != extensions->end(); ++extension) {
CreateBackgroundHost(manager, *extension);
}
}
ExtensionProcessManager::ExtensionProcessManager(Profile* profile)
: browsing_instance_(new BrowsingInstance(profile)) {
registrar_.Add(this, NotificationType::EXTENSIONS_READY,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSION_LOADED,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSION_UNLOADED,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSION_HOST_DESTROYED,
Source<Profile>(profile));
registrar_.Add(this, NotificationType::RENDERER_PROCESS_TERMINATED,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::RENDERER_PROCESS_CLOSED,
NotificationService::AllSources());
}
ExtensionProcessManager::~ExtensionProcessManager() {
// Copy all_hosts_ to avoid iterator invalidation issues.
ExtensionHostSet to_delete(background_hosts_.begin(),
background_hosts_.end());
ExtensionHostSet::iterator iter;
for (iter = to_delete.begin(); iter != to_delete.end(); ++iter)
delete *iter;
}
ExtensionHost* ExtensionProcessManager::CreateView(Extension* extension,
const GURL& url,
Browser* browser) {
DCHECK(extension);
DCHECK(browser);
ExtensionHost* host =
new ExtensionHost(extension, GetSiteInstanceForURL(url), url,
ViewType::EXTENSION_TOOLSTRIP);
host->CreateView(browser);
OnExtensionHostCreated(host, false);
return host;
}
ExtensionHost* ExtensionProcessManager::CreateView(const GURL& url,
Browser* browser) {
DCHECK(browser);
ExtensionsService* service =
browsing_instance_->profile()->GetExtensionsService();
if (service) {
Extension* extension = service->GetExtensionByURL(url);
if (extension)
return CreateView(extension, url, browser);
}
return NULL;
}
ExtensionHost* ExtensionProcessManager::CreateBackgroundHost(
Extension* extension, const GURL& url) {
ExtensionHost* host =
new ExtensionHost(extension, GetSiteInstanceForURL(url), url,
ViewType::EXTENSION_BACKGROUND_PAGE);
host->CreateRenderView(NULL); // create a RenderViewHost with no view
OnExtensionHostCreated(host, true);
return host;
}
void ExtensionProcessManager::RegisterExtensionProcess(
const std::string& extension_id, int process_id) {
ProcessIDMap::const_iterator it = process_ids_.find(extension_id);
if (it != process_ids_.end() && (*it).second == process_id)
return;
// Extension ids should get removed from the map before the process ids get
// reused from a dead renderer.
DCHECK(it == process_ids_.end());
process_ids_[extension_id] = process_id;
ExtensionsService* extension_service =
browsing_instance_->profile()->GetExtensionsService();
std::vector<std::string> page_action_ids;
Extension* extension = extension_service->GetExtensionById(extension_id);
for (PageActionMap::const_iterator i = extension->page_actions().begin();
i != extension->page_actions().end(); ++i) {
page_action_ids.push_back(i->first);
}
RenderProcessHost* rph = RenderProcessHost::FromID(process_id);
rph->Send(new ViewMsg_Extension_UpdatePageActions(extension_id,
page_action_ids));
}
void ExtensionProcessManager::UnregisterExtensionProcess(int process_id) {
ProcessIDMap::iterator it = process_ids_.begin();
while (it != process_ids_.end()) {
if (it->second == process_id)
process_ids_.erase(it++);
else
++it;
}
}
RenderProcessHost* ExtensionProcessManager::GetExtensionProcess(
const std::string& extension_id) {
ProcessIDMap::const_iterator it = process_ids_.find(extension_id);
if (it == process_ids_.end())
return NULL;
RenderProcessHost* rph = RenderProcessHost::FromID(it->second);
DCHECK(rph) << "We should have unregistered this host.";
return rph;
}
SiteInstance* ExtensionProcessManager::GetSiteInstanceForURL(const GURL& url) {
return browsing_instance_->GetSiteInstanceForURL(url);
}
void ExtensionProcessManager::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
switch (type.value) {
case NotificationType::EXTENSIONS_READY:
CreateBackgroundHosts(this,
Source<ExtensionsService>(source).ptr()->extensions());
break;
case NotificationType::EXTENSION_LOADED: {
ExtensionsService* service = Source<ExtensionsService>(source).ptr();
if (service->is_ready()) {
Extension* extension = Details<Extension>(details).ptr();
::CreateBackgroundHost(this, extension);
}
break;
}
case NotificationType::EXTENSION_UNLOADED: {
Extension* extension = Details<Extension>(details).ptr();
for (ExtensionHostSet::iterator iter = background_hosts_.begin();
iter != background_hosts_.end(); ++iter) {
ExtensionHost* host = *iter;
if (host->extension()->id() == extension->id()) {
delete host;
// |host| should deregister itself from our structures.
DCHECK(background_hosts_.find(host) == background_hosts_.end());
break;
}
}
break;
}
case NotificationType::EXTENSION_HOST_DESTROYED: {
ExtensionHost* host = Details<ExtensionHost>(details).ptr();
all_hosts_.erase(host);
background_hosts_.erase(host);
break;
}
case NotificationType::RENDERER_PROCESS_TERMINATED:
case NotificationType::RENDERER_PROCESS_CLOSED: {
RenderProcessHost* host = Source<RenderProcessHost>(source).ptr();
UnregisterExtensionProcess(host->id());
break;
}
default:
NOTREACHED();
}
}
void ExtensionProcessManager::OnExtensionHostCreated(ExtensionHost* host,
bool is_background) {
all_hosts_.insert(host);
if (is_background)
background_hosts_.insert(host);
NotificationService::current()->Notify(
NotificationType::EXTENSION_HOST_CREATED,
Source<ExtensionProcessManager>(this),
Details<ExtensionHost>(host));
}
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