blob: f23814396444877d20d224a38b999a1fcf883488 [file] [log] [blame]
// 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.
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "base/macros.h"
#include "ui/app_list/app_list_export.h"
#include "ui/app_list/search/tokenized_string.h"
namespace base {
namespace i18n {
class UTF16CharIterator;
namespace app_list {
// An UTF16 char iterator for a TokenizedString.
class APP_LIST_EXPORT TokenizedStringCharIterator {
struct State {
State(size_t token_index, int char_index);
size_t token_index;
int32_t char_index;
// Requires |tokenized| out-lives this iterator.
explicit TokenizedStringCharIterator(const TokenizedString& tokenized);
// Advances to the next char. Returns false if there is no next char.
bool NextChar();
// Advances to the first char of the next token. Returns false if there is
// no next token.
bool NextToken();
// Returns the current char if there is one. Otherwise, returns 0.
int32_t Get() const;
// Returns the array index in original text of the tokenized string that is
// passed in constructor.
int32_t GetArrayPos() const;
// Returns the number of UTF16 code units for the current char.
size_t GetCharSize() const;
// Returns true if the current char is the first char of the current token.
bool IsFirstCharOfToken() const;
// Helpers to get and restore the iterator's state.
State GetState() const;
void SetState(const State& state);
// Returns true if the iterator is at the end.
bool end() const { return !current_token_iter_; }
void CreateTokenCharIterator();
const TokenizedString::Tokens& tokens_;
const TokenizedString::Mappings& mappings_;
size_t current_token_;
std::unique_ptr<base::i18n::UTF16CharIterator> current_token_iter_;
} // namespace app_list