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// Copyright (c) 2006-2008 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_CHARACTER_ENCODING_H__
#define CHROME_BROWSER_CHARACTER_ENCODING_H__
#include <string>
#include <utility>
#include <vector>
#include "base/basictypes.h"
class CharacterEncoding {
public:
// Enumeration of the types of Browser encoding name we
// currently support. This is defined outside of Browser
// to avoid cyclical dependencies.
// Return canonical encoding name according to the command ID.
// THIS FUNCTION IS NOT THREADSAFE. You must run this function
// only in UI thread.
static std::wstring GetCanonicalEncodingNameByCommandId(int id);
// Return display name of canonical encoding according to the command
// ID. THIS FUNCTION IS NOT THREADSAFE. You must run this function
// only in UI thread.
static std::wstring GetCanonicalEncodingDisplayNameByCommandId(int id);
// Return count number of all supported canonical encoding.
static int GetSupportCanonicalEncodingCount();
// Return canonical encoding name according to the index, which starts
// from zero to GetSupportCanonicalEncodingCount() - 1. THIS FUNCTION
// IS NOT THREADSAFE. You must run this function only in UI thread.
static std::wstring GetCanonicalEncodingNameByIndex(int index);
// Return display name of canonical encoding according to the index,
// which starts from zero to GetSupportCanonicalEncodingCount() - 1.
// THIS FUNCTION IS NOT THREADSAFE. You must run this function
// only in UI thread.
static std::wstring GetCanonicalEncodingDisplayNameByIndex(int index);
// Return canonical encoding name according to the encoding alias name. THIS
// FUNCTION IS NOT THREADSAFE. You must run this function only in UI thread.
static std::wstring GetCanonicalEncodingNameByAliasName(
const std::wstring& alias_name);
// Returns the pointer of a vector of command ids corresponding to
// encodings to display in the encoding menu. The list begins with
// the locale-dependent static encodings and recently selected
// encodings is followed by the rest of encodings belonging to neither.
// The vector will be created and destroyed by CharacterEncoding.
// The returned std::vector is maintained by this class. The parameter
// |locale_encodings| is string of static encodings list which is from the
// corresponding string resource that is stored in the resource bundle.
// The parameter |recently_select_encodings| is string of encoding list which
// is from user recently selected. THIS FUNCTION IS NOT THREADSAFE. You must
// run this function only in UI thread.
static const std::vector<int>* GetCurrentDisplayEncodings(
const std::wstring& locale_encodings,
const std::wstring& recently_select_encodings);
// This function is for updating |original_selected_encoding_list| with a
// |new_selected_encoding_id|. If the encoding is already in the original
// list, then returns false. Otherwise |selected_encoding_list| will return a
// new string for user selected encoding short list and function returns true.
static bool UpdateRecentlySelectdEncoding(
const std::wstring& original_selected_encodings,
int new_selected_encoding_id,
std::wstring* selected_encodings);
// Get encoding command id according to input encoding name. If the name is
// valid, return corresponding encoding command id. Otherwise return 0;
static int GetCommandIdByCanonicalEncodingName(
const std::wstring& encoding_name);
private:
// Disallow instantiating it since this class only contains static methods.
DISALLOW_IMPLICIT_CONSTRUCTORS(CharacterEncoding);
};
#endif // CHROME_BROWSER_CHARACTER_ENCODING_H__
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