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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.
#ifndef CHROME_BROWSER_CLD_HELPER_H_
#define CHROME_BROWSER_CLD_HELPER_H_
#include <string>
#include "base/ref_counted.h"
// The CLDHelper class detects the language of a page, using the toolbar CLD
// detection library. (CLD stands for Compact Language Detection.)
// It should be created and the detection process started on the same thread.
// The detection happens on the file thread and a TAB_LANGUAGE_DETERMINED
// notification is sent (on the UI thread) when the language has been detected.
class CLDHelper : public base::RefCountedThreadSafe<CLDHelper> {
public:
// |process_id| and |routing_id| should reference the RenderViewHost this page
// is related to. |page_id| is the id of the page for the specified
// |page_contents|.
CLDHelper(int process_id,
int routing_id,
int page_id,
const std::wstring& page_content);
// Starts the process of detecting the language of the page.
void DetectLanguage();
int page_id() const { return page_id_; }
std::string language() const { return language_; }
private:
// Private because the class is ref counted.
friend class base::RefCountedThreadSafe<CLDHelper>;
~CLDHelper() {}
// Performs the actual work of detecting the language.
void DoDetectLanguage();
// Invoked on the UI thread once the language has been detected.
void DetectionDone();
// The process id and routing id of the RenderViewHost for which the language
// is being detected.
int process_id_;
int routing_id_;
// The id and content of the page for which the language is being detected.
int page_id_;
std::wstring page_content_;
// The language that was detected.
std::string language_;
DISALLOW_COPY_AND_ASSIGN(CLDHelper);
};
#endif // CHROME_BROWSER_CLD_HELPER_H_
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