ferencd@0: /*
ferencd@0:  * This project is licensed under the MIT license. For more information see the
ferencd@0:  * LICENSE file.
ferencd@0:  */
ferencd@0: #pragma once
ferencd@0: 
ferencd@0: // -----------------------------------------------------------------------------
ferencd@0: 
ferencd@0: #include <functional>
ferencd@0: #include <string>
ferencd@0: #include <regex>
ferencd@0: 
ferencd@0: #include "maddy/blockparser.h"
ferencd@0: 
ferencd@0: // -----------------------------------------------------------------------------
ferencd@0: 
ferencd@0: namespace maddy {
ferencd@0: 
ferencd@0: // -----------------------------------------------------------------------------
ferencd@0: 
ferencd@0: /**
ferencd@0:  * HorizontalLineParser
ferencd@0:  *
ferencd@0:  * From Markdown: `---`
ferencd@0:  *
ferencd@0:  * To HTML: `<hr/>`
ferencd@0:  *
ferencd@0:  * @class
ferencd@0:  */
ferencd@0: class HorizontalLineParser : public BlockParser
ferencd@0: {
ferencd@0: public:
ferencd@0:   /**
ferencd@0:    * ctor
ferencd@0:    *
ferencd@0:    * @method
ferencd@0:    * @param {std::function<void(std::string&)>} parseLineCallback
ferencd@0:    * @param {std::function<std::shared_ptr<BlockParser>(const std::string& line)>} getBlockParserForLineCallback
ferencd@0:    */
ferencd@0:   HorizontalLineParser(
ferencd@0:     std::function<void(std::string&)> parseLineCallback,
ferencd@0:     std::function<std::shared_ptr<BlockParser>(const std::string& line)> getBlockParserForLineCallback
ferencd@0:   )
ferencd@0:     : BlockParser(parseLineCallback, getBlockParserForLineCallback)
ferencd@0:     , lineRegex("^---$")
ferencd@0:   {}
ferencd@0: 
ferencd@0:   /**
ferencd@0:    * IsStartingLine
ferencd@0:    *
ferencd@0:    * If the line has exact three dashes `---`, then it is a horizontal line.
ferencd@0:    *
ferencd@0:    * @method
ferencd@0:    * @param {const std::string&} line
ferencd@0:    * @return {bool}
ferencd@0:    */
ferencd@0:   static bool
ferencd@0:   IsStartingLine(const std::string& line)
ferencd@0:   {
ferencd@0:     static std::regex re("^---$");
ferencd@0:     return std::regex_match(line, re);
ferencd@0:   }
ferencd@0: 
ferencd@0:   /**
ferencd@0:    * IsFinished
ferencd@0:    *
ferencd@0:    * The horizontal line is always only one line long, so this method always
ferencd@0:    * returns true.
ferencd@0:    *
ferencd@0:    * @method
ferencd@0:    * @return {bool}
ferencd@0:    */
ferencd@0:   bool
ferencd@0:   IsFinished() const override
ferencd@0:   {
ferencd@0:     return true;
ferencd@0:   }
ferencd@0: 
ferencd@0: protected:
ferencd@0:   bool
ferencd@0:   isInlineBlockAllowed() const override
ferencd@0:   {
ferencd@0:     return false;
ferencd@0:   }
ferencd@0: 
ferencd@0:   bool
ferencd@0:   isLineParserAllowed() const override
ferencd@0:   {
ferencd@0:     return false;
ferencd@0:   }
ferencd@0: 
ferencd@0:   void
ferencd@0:   parseBlock(std::string& line) override
ferencd@0:   {
ferencd@0:     static std::string replacement = "<hr/>";
ferencd@0: 
ferencd@0:     line = std::regex_replace(line, lineRegex, replacement);
ferencd@0:   }
ferencd@0: 
ferencd@0: private:
ferencd@0:   std::regex lineRegex;
ferencd@0: }; // class HorizontalLineParser
ferencd@0: 
ferencd@0: // -----------------------------------------------------------------------------
ferencd@0: 
ferencd@0: } // namespace maddy