root/chrome/browser/extensions/extension_web_ui_override_registrar.cc

DEFINITIONS

1. Observe
2. GetFactoryInstance

// 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 "chrome/browser/extensions/extension_web_ui_override_registrar.h"

#include "base/lazy_instance.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/extension_web_ui.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_service.h"

namespace extensions {

ExtensionWebUIOverrideRegistrar::ExtensionWebUIOverrideRegistrar(
    content::BrowserContext* context)
    : profile_(Profile::FromBrowserContext(context)) {
  registrar_.Add(this,
                 chrome::NOTIFICATION_EXTENSION_LOADED,
                 content::Source<Profile>(profile_));
  registrar_.Add(this,
                 chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
                 content::Source<Profile>(profile_));
}

ExtensionWebUIOverrideRegistrar::~ExtensionWebUIOverrideRegistrar() {
}

void ExtensionWebUIOverrideRegistrar::Observe(
    int type,
    const content::NotificationSource& source,
    const content::NotificationDetails& details) {
  if (type == chrome::NOTIFICATION_EXTENSION_LOADED) {
    const Extension* extension =
        content::Details<const Extension>(details).ptr();
    ExtensionWebUI::RegisterChromeURLOverrides(
        profile_, URLOverrides::GetChromeURLOverrides(extension));

  } else if (type == chrome::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED) {
    const Extension* extension =
        content::Details<UnloadedExtensionInfo>(details)->extension;
    ExtensionWebUI::UnregisterChromeURLOverrides(
        profile_, URLOverrides::GetChromeURLOverrides(extension));
  }
}

static base::LazyInstance<
    BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar> > g_factory =
    LAZY_INSTANCE_INITIALIZER;

// static
BrowserContextKeyedAPIFactory<ExtensionWebUIOverrideRegistrar>*
ExtensionWebUIOverrideRegistrar::GetFactoryInstance() {
  return g_factory.Pointer();
}

}  // namespace extensions