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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_
#pragma once
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/string16.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.
// Structure to save encoding information.
struct EncodingInfo {
explicit EncodingInfo(int id);
// Gets string key of EncodingInfo. With this method, we can use
// l10n_util::SortVectorWithStringKey to sort the encoding menu items
// by current locale character sequence. We need to keep the order within
// encoding category name, that's why we use category name as key.
const string16& GetStringKey() const { return encoding_category_name; }
// Encoding command id.
int encoding_id;
// Encoding display name.
string16 encoding_display_name;
// Encoding category name.
string16 encoding_category_name;
};
// 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::string 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 string16 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::string 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 string16 GetCanonicalEncodingDisplayNameByIndex(int index);
// Return encoding command id according to the index, which starts from
// zero to GetSupportCanonicalEncodingCount() - 1. Otherwise returns 0.
static int GetEncodingCommandIdByIndex(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::string GetCanonicalEncodingNameByAliasName(
const std::string& alias_name);
// Returns the pointer of a vector of EncodingInfos corresponding to
// encodings to display in the encoding menu. The locale-dependent static
// encodings come at the top of the list and recently selected encodings
// come next. Finally, the rest of encodings are listed.
// The vector will be created and destroyed by CharacterEncoding.
// The returned std::vector is maintained by this class. The parameter
// |locale| points to the current application (UI) locale. 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<EncodingInfo>* GetCurrentDisplayEncodings(
const std::string& locale,
const std::string& locale_encodings,
const std::string& 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 UpdateRecentlySelectedEncoding(
const std::string& original_selected_encodings,
int new_selected_encoding_id,
std::string* 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::string& 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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