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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/tab_contents/site_instance.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/notification_type.h"
static void CreateBackgroundHosts(
ExtensionProcessManager* manager, const ExtensionList* extensions) {
for (ExtensionList::const_iterator extension = extensions->begin();
extension != extensions->end(); ++extension) {
// Start the process for the master page, if it exists.
if ((*extension)->background_url().is_valid())
manager->CreateBackgroundHost(*extension, (*extension)->background_url());
}
}
ExtensionProcessManager::ExtensionProcessManager(Profile* profile)
: browsing_instance_(new BrowsingInstance(profile)) {
registrar_.Add(this, NotificationType::EXTENSIONS_READY,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSIONS_LOADED,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSION_UNLOADED,
NotificationService::AllSources());
registrar_.Add(this, NotificationType::EXTENSION_HOST_DESTROYED,
Source<Profile>(profile));
}
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);
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);
host->CreateRenderView(NULL); // create a RenderViewHost with no view
OnExtensionHostCreated(host, true);
return host;
}
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::EXTENSIONS_LOADED: {
ExtensionsService* service = Source<ExtensionsService>(source).ptr();
if (service->is_ready()) {
const ExtensionList* extensions = Details<ExtensionList>(details).ptr();
CreateBackgroundHosts(this, extensions);
}
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;
}
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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