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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
/** Parses the starmath code and creates the nodes.
*
*/
#pragma once
#include <unotools/resmgr.hxx>
#include "node.hxx"
#include <set>
#include <utility>
#define DEPTH_LIMIT 1024
// Those are the errors that the parser may encounter.
enum class SmParseError : uint_fast8_t
{
None = 0,
UnexpectedChar = 1,
UnexpectedToken = 2,
PoundExpected = 3,
ColorExpected = 4,
LgroupExpected = 5,
RgroupExpected = 6,
LbraceExpected = 7,
RbraceExpected = 8,
ParentMismatch = 9,
RightExpected = 10,
FontExpected = 11,
SizeExpected = 12,
DoubleAlign = 13,
DoubleSubsupscript = 14,
NumberExpected = 15
};
struct SmErrorDesc
{
SmParseError m_eType;
SmNode* m_pNode;
OUString m_aText;
SmErrorDesc(SmParseError eType, SmNode* pNode, OUString aText)
: m_eType(eType)
, m_pNode(pNode)
, m_aText(std::move(aText))
{
}
};
class DepthProtect
{
private:
sal_Int32& m_rParseDepth;
public:
DepthProtect(sal_Int32& rParseDepth)
: m_rParseDepth(rParseDepth)
{
++m_rParseDepth;
if (m_rParseDepth > DEPTH_LIMIT)
throw std::range_error("parser depth limit");
}
~DepthProtect() { --m_rParseDepth; }
};
namespace starmathdatabase
{
// Must be in sync with SmParseError list
extern const TranslateId SmParseErrorDesc[16];
OUString getParseErrorDesc(SmParseError err);
}
class AbstractSmParser
{
public:
virtual ~AbstractSmParser() {}
/** Parse rBuffer to formula tree */
virtual std::unique_ptr<SmTableNode> Parse(const OUString& rBuffer) = 0;
/** Parse rBuffer to formula subtree that constitutes an expression */
virtual std::unique_ptr<SmNode> ParseExpression(const OUString& rBuffer) = 0;
virtual const OUString& GetText() const = 0;
virtual bool IsImportSymbolNames() const = 0;
virtual void SetImportSymbolNames(bool bVal) = 0;
virtual bool IsExportSymbolNames() const = 0;
virtual void SetExportSymbolNames(bool bVal) = 0;
virtual const SmErrorDesc* NextError() = 0;
virtual const SmErrorDesc* PrevError() = 0;
virtual const SmErrorDesc* GetError() const = 0;
virtual const std::set<OUString>& GetUsedSymbols() const = 0;
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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