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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#pragma once
#include "SimpleLexer.h"
#include <QStringView>
#include <QTextBlock>
QT_FORWARD_DECLARE_CLASS(QTextCursor)
namespace CPlusPlus {
class CPLUSPLUS_EXPORT BackwardsScanner
{
enum { MAX_BLOCK_COUNT = 10 };
public:
BackwardsScanner(const QTextCursor &cursor,
const LanguageFeatures &languageFeatures,
int maxBlockCount = MAX_BLOCK_COUNT,
const QString &suffix = QString(),
bool skipComments = true);
int startToken() const;
int startPosition() const;
QString text() const;
QString mid(int index) const;
QString text(int index) const;
QStringView textRef(int index) const;
// 1-based
Token LA(int index) const;
// n-la token is [startToken - n]
Token operator[](int index) const; // ### deprecate
QString indentationString(int index) const;
int startOfLine(int index) const;
int startOfMatchingBrace(int index) const;
int startOfBlock(int index) const;
int size() const;
int offset() const;
static int previousBlockState(const QTextBlock &block);
private:
const Token &fetchToken(int tokenIndex);
private:
Tokens _tokens;
int _offset;
int _blocksTokenized;
QTextBlock _block;
SimpleLexer _tokenize;
QString _text;
int _maxBlockCount;
int _startToken;
};
} // namespace CPlusPlus
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