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// Copyright 2013 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_TRANSLATE_TRANSLATE_SCRIPT_H_
#define CHROME_BROWSER_TRANSLATE_TRANSLATE_SCRIPT_H_
#include <string>
#include "base/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
class TranslateScriptTest;
class TranslateURLFetcher;
class TranslateScript {
public:
typedef base::Callback<void(bool, const std::string&)> Callback;
static const int kFetcherId = 0;
TranslateScript();
virtual ~TranslateScript();
// Returns the feched the translate script.
const std::string& data() { return data_; }
// Used by unit-tests to override some defaults:
// Delay after which the translate script is fetched again from the
// translation server.
void set_expiration_delay(int delay_ms) {
expiration_delay_ = base::TimeDelta::FromMilliseconds(delay_ms);
}
// Clears the translate script, so it will be fetched next time we translate.
void Clear() { data_.clear(); }
// Fetches the JS translate script (the script that is injected in the page
// to translate it).
void Request(const Callback& callback);
// Returns true if this has a pending request.
bool HasPendingRequest() const { return fetcher_.get() != NULL; }
private:
friend class TranslateScriptTest;
FRIEND_TEST_ALL_PREFIXES(TranslateScriptTest, CheckScriptParameters);
FRIEND_TEST_ALL_PREFIXES(TranslateScriptTest, CheckScriptURL);
static const char kScriptURL[];
static const char kRequestHeader[];
// Used in kTranslateScriptURL to specify using always ssl to load resources.
static const char kAlwaysUseSslQueryName[];
static const char kAlwaysUseSslQueryValue[];
// Used in kTranslateScriptURL to specify a callback function name.
static const char kCallbackQueryName[];
static const char kCallbackQueryValue[];
// Used in kTranslateScriptURL to specify a CSS loader callback function name.
static const char kCssLoaderCallbackQueryName[];
static const char kCssLoaderCallbackQueryValue[];
// Used in kTranslateScriptURL to specify a JavaScript loader callback
// function name.
static const char kJavascriptLoaderCallbackQueryName[];
static const char kJavascriptLoaderCallbackQueryValue[];
// The callback when the script is fetched or a server error occured.
void OnScriptFetchComplete(int id, bool success, const std::string& data);
// URL fetcher to fetch the translate script.
scoped_ptr<TranslateURLFetcher> fetcher_;
// The JS injected in the page to do the translation.
std::string data_;
// Delay after which the translate script is fetched again from the translate
// server.
base::TimeDelta expiration_delay_;
// The callback called when the server sends a response.
Callback callback_;
base::WeakPtrFactory<TranslateScript> weak_method_factory_;
DISALLOW_COPY_AND_ASSIGN(TranslateScript);
};
#endif // CHROME_BROWSER_TRANSLATE_TRANSLATE_SCRIPT_H_
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