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miroir de https://github.com/quitesimpleorg/qsmaddy.git synchronisé 2024-11-16 13:17:51 +01:00
qsmaddy/include/maddy/headlineparser.h
2017-12-25 12:22:35 +01:00

139 lignes
2.8 KiB
C++

/*
* This project is licensed under the MIT license. For more information see the
* LICENSE file.
*/
#pragma once
// -----------------------------------------------------------------------------
#include <functional>
#include <string>
#include <regex>
#include "maddy/blockparser.h"
// -----------------------------------------------------------------------------
namespace maddy {
// -----------------------------------------------------------------------------
/**
* HeadlineParser
*
* From Markdown:
*
* ```
* # Headline 1
* ## Headline 2
* ### Headline 3
* #### Headline 4
* ##### Headline 5
* ###### Headline 6
* ```
*
* To HTML:
*
* ```
* <h1>Headline 1</h1>
* <h2>Headline 2</h2>
* <h3>Headline 3</h3>
* <h4>Headline 4</h4>
* <h5>Headline 5</h5>
* <h6>Headline 6</h6>
* ```
*
* @class
*/
class HeadlineParser : public BlockParser
{
public:
/**
* ctor
*
* @method
* @param {std::function<void(std::string&)>} parseLineCallback
* @param {std::function<std::shared_ptr<BlockParser>(const std::string& line)>} getBlockParserForLineCallback
*/
HeadlineParser(
std::function<void(std::string&)> parseLineCallback,
std::function<std::shared_ptr<BlockParser>(const std::string& line)> getBlockParserForLineCallback
)
: BlockParser(parseLineCallback, getBlockParserForLineCallback)
{}
/**
* IsStartingLine
*
* If the line starts with 1 - 6 `#`, then it is a headline.
*
* @method
* @param {const std::string&} line
* @return {bool}
*/
static bool
IsStartingLine(const std::string& line)
{
static std::regex re("^(?:#){1,6} (.*)");
return std::regex_match(line, re);
}
/**
* IsFinished
*
* The headline is always only one line long, so this method always returns
* true.
*
* @method
* @return {bool}
*/
bool
IsFinished() const override
{
return true;
}
protected:
bool
isInlineBlockAllowed() const override
{
return false;
}
bool
isLineParserAllowed() const override
{
return false;
}
void
parseBlock(std::string& line) override
{
static std::vector<std::regex> hlRegex = {
std::regex("^# (.*)")
, std::regex("^(?:#){2} (.*)")
, std::regex("^(?:#){3} (.*)")
, std::regex("^(?:#){4} (.*)")
, std::regex("^(?:#){5} (.*)")
, std::regex("^(?:#){6} (.*)")
};
static std::vector<std::string> hlReplacement = {
"<h1>$1</h1>"
, "<h2>$1</h2>"
, "<h3>$1</h3>"
, "<h4>$1</h4>"
, "<h5>$1</h5>"
, "<h6>$1</h6>"
};
for (uint8_t i = 0; i < 6; ++i)
{
line = std::regex_replace(line, hlRegex[i], hlReplacement[i]);
}
}
}; // class HeadlineParser
// -----------------------------------------------------------------------------
} // namespace maddy