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// Copyright (c) 2010 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.
#ifndef CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
#define CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "base/scoped_ptr.h"
#include "base/scoped_vector.h"
#include "base/task_queue.h"
#include "base/weak_ptr.h"
#include "chrome/browser/webdata/web_data_service.h"
class GURL;
class NotificationSource;
class NotificationType;
class SearchHostToURLsMap;
class Task;
class TemplateURL;
// Provides the search provider install state for the I/O thread. It works by
// loading the data on demand (when CallWhenLoaded is called) and then throwing
// away the results after the callbacks are done, so the results are always up
// to date with what is in the database.
class SearchProviderInstallData : public WebDataServiceConsumer,
public base::SupportsWeakPtr<SearchProviderInstallData> {
public:
enum State {
// The search provider is not installed.
NOT_INSTALLED = 0,
// The search provider is in the user's set but is not
INSTALLED_BUT_NOT_DEFAULT = 1,
// The search provider is set as the user's default.
INSTALLED_AS_DEFAULT = 2
};
// |ui_death_notification| and |ui_death_source| indentify a notification that
// may be observed on the UI thread to know when this class no longer needs to
// be kept up to date. (Note that this class may be deleted before or after
// that notification occurs. It doesn't matter.)
SearchProviderInstallData(WebDataService* web_service,
NotificationType ui_death_notification,
const NotificationSource& ui_death_source);
virtual ~SearchProviderInstallData();
// Use to determine when the search provider information is loaded. The
// callback may happen synchronously or asynchronously. This takes ownership
// of |task|. There is no need to do anything special to make it function
// (as it just relies on the normal I/O thread message loop).
void CallWhenLoaded(Task* task);
// Returns the search provider install state for the given origin.
// This should only be called while a task is called back from CallWhenLoaded.
State GetInstallState(const GURL& requested_origin);
// Called when the google base url has changed.
void OnGoogleURLChange(const std::string& google_base_url);
private:
// WebDataServiceConsumer
// Notification that the keywords have been loaded.
// This is invoked from WebDataService, and should not be directly
// invoked.
virtual void OnWebDataServiceRequestDone(WebDataService::Handle h,
const WDTypedResult* result);
// Stores information about the default search provider.
void SetDefault(const TemplateURL* template_url);
// Sets up the loaded state and then lets clients know that the search
// provider install state has been loaded.
void OnLoadFailed();
// Does notifications to let clients know that the search provider
// install state has been loaded.
void NotifyLoaded();
// The list of tasks to call after the load has finished.
TaskQueue task_queue_;
// Service used to store entries.
scoped_refptr<WebDataService> web_service_;
// If non-zero, we're waiting on a load.
WebDataService::Handle load_handle_;
// Holds results of a load that was done using this class.
scoped_ptr<SearchHostToURLsMap> provider_map_;
// The list of template urls that are owned by the class.
ScopedVector<const TemplateURL> template_urls_;
// The security origin for the default search provider.
std::string default_search_origin_;
// The google base url.
std::string google_base_url_;
DISALLOW_COPY_AND_ASSIGN(SearchProviderInstallData);
};
#endif // CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
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