rcpp_framework/libs/maddy/quoteparser.h

166 lines
3.1 KiB
C++

/*
* This project is licensed under the MIT license. For more information see the
* LICENSE file.
*/
#pragma once
// -----------------------------------------------------------------------------
#include <functional>
#include <regex>
#include <string>
#include "maddy/blockparser.h"
// -----------------------------------------------------------------------------
namespace maddy {
// -----------------------------------------------------------------------------
/**
* QuoteParser
*
* @class
*/
class QuoteParser : public BlockParser
{
public:
/**
* ctor
*
* @method
* @param {std::function<void(std::string&)>} parseLineCallback
* @param {std::function<std::shared_ptr<BlockParser>(const std::string& line)>} getBlockParserForLineCallback
*/
QuoteParser(
std::function<void(std::string&)> parseLineCallback,
std::function<std::shared_ptr<BlockParser>(const std::string& line)> getBlockParserForLineCallback
)
: BlockParser(parseLineCallback, getBlockParserForLineCallback)
, isStarted(false)
, isFinished(false)
{}
/**
* IsStartingLine
*
* A quote starts with `> `.
*
* @method
* @param {const std::string&} line
* @return {bool}
*/
static bool
IsStartingLine(const std::string& line)
{
static std::regex re("^\\>.*");
return std::regex_match(line, re);
}
/**
* AddLine
*
* Adding a line which has to be parsed.
*
* @method
* @param {std::string&} line
* @return {void}
*/
void
AddLine(std::string& line) override
{
if (!this->isStarted)
{
this->result << "<blockquote>";
this->isStarted = true;
}
bool finish = false;
if (line.empty())
{
finish = true;
}
this->parseBlock(line);
if (this->isInlineBlockAllowed() && !this->childParser)
{
this->childParser = this->getBlockParserForLine(line);
}
if (this->childParser)
{
this->childParser->AddLine(line);
if (this->childParser->IsFinished())
{
this->result << this->childParser->GetResult().str();
this->childParser = nullptr;
}
return;
}
if (this->isLineParserAllowed())
{
this->parseLine(line);
}
if (finish)
{
this->result << "</blockquote>";
this->isFinished = true;
}
this->result << line;
}
/**
* IsFinished
*
* @method
* @return {bool}
*/
bool
IsFinished() const override
{
return this->isFinished;
}
protected:
bool
isInlineBlockAllowed() const override
{
return true;
}
bool
isLineParserAllowed() const override
{
return true;
}
void
parseBlock(std::string& line) override
{
static std::regex lineRegexWithSpace("^\\> ");
line = std::regex_replace(line, lineRegexWithSpace, "");
static std::regex lineRegexWithoutSpace("^\\>");
line = std::regex_replace(line, lineRegexWithoutSpace, "");
if (!line.empty())
{
line += " ";
}
}
private:
bool isStarted;
bool isFinished;
}; // class QuoteParser
// -----------------------------------------------------------------------------
} // namespace maddy