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// 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.
#ifndef CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
#define CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
#include <string>
#include "base/basictypes.h"
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/weak_ptr.h"
class GURL;
class GoogleURLTracker;
class SearchHostToURLsMap;
class TemplateURL;
class TemplateURLService;
namespace content {
class RenderProcessHost;
}
// 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:
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
};
// |host| is a RenderProcessHost that is observed, and whose destruction is a
// signal to this class that it no longer needs to be kept up to date. (Note
// that this class may be deleted before or after that death occurs. It
// doesn't matter.)
SearchProviderInstallData(TemplateURLService* template_url_service,
const std::string& google_base_url,
GoogleURLTracker* google_url_tracker,
content::RenderProcessHost* host);
virtual ~SearchProviderInstallData();
// Use to determine when the search provider information is loaded. The
// callback may happen synchronously or asynchronously. 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(const base::Closure& closure);
// 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:
// Receives a copy of the TemplateURLService's keywords on the IO thread.
void OnTemplateURLsLoaded(ScopedVector<TemplateURL> template_urls,
TemplateURL* default_provider);
// 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 original data source. Only accessed on the UI thread.
TemplateURLService* template_url_service_;
// The list of closures to call after the load has finished. If empty, there
// is no pending load.
std::vector<base::Closure> closure_queue_;
// 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<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_;
base::WeakPtrFactory<SearchProviderInstallData> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(SearchProviderInstallData);
};
#endif // CHROME_BROWSER_SEARCH_ENGINES_SEARCH_PROVIDER_INSTALL_DATA_H_
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