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:  * CodeBlockParser
ferencd@0:  *
ferencd@0:  * From Markdown: 3 times surrounded code (without space in the beginning)
ferencd@0:  *
ferencd@0:  * ```
ferencd@0:  *  ```
ferencd@0:  * some code
ferencd@0:  *  ```
ferencd@0:  * ```
ferencd@0:  *
ferencd@0:  * To HTML:
ferencd@0:  *
ferencd@0:  * ```
ferencd@0:  * <pre><code>
ferencd@0:  * some code
ferencd@0:  * </code></pre>
ferencd@0:  * ```
ferencd@0:  *
ferencd@0:  * @class
ferencd@0:  */
ferencd@0: class CodeBlockParser : 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:    CodeBlockParser(
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:     , isStarted(false)
ferencd@0:     , isFinished(false)
ferencd@0:   {}
ferencd@0: 
ferencd@0:   /**
ferencd@0:    * IsStartingLine
ferencd@0:    *
ferencd@0:    * If the line starts with three code signs, then it is a code block.
ferencd@0:    *
ferencd@0:    * ```
ferencd@0:    *  ```
ferencd@0:    * ```
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("^(?:`){3}$");
ferencd@0:     return std::regex_match(line, re);
ferencd@0:   }
ferencd@0: 
ferencd@0:   /**
ferencd@0:    * IsFinished
ferencd@0:    *
ferencd@0:    * @method
ferencd@0:    * @return {bool}
ferencd@0:    */
ferencd@0:   bool
ferencd@0:   IsFinished() const override
ferencd@0:   {
ferencd@0:     return this->isFinished;
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:     if (line == "```")
ferencd@0:     {
ferencd@0:       if (!this->isStarted)
ferencd@0:       {
ferencd@0:         line = "<pre><code>\n";
ferencd@0:         this->isStarted = true;
ferencd@0:         this->isFinished = false;
ferencd@0:         return;
ferencd@0:       }
ferencd@0:       else
ferencd@0:       {
ferencd@0:         line = "</code></pre>";
ferencd@0:         this->isFinished = true;
ferencd@0:         this->isStarted = false;
ferencd@0:         return;
ferencd@0:       }
ferencd@0:     }
ferencd@0: 
ferencd@0:     line += "\n";
ferencd@0:   }
ferencd@0: 
ferencd@0: private:
ferencd@0:   bool isStarted;
ferencd@0:   bool isFinished;
ferencd@0: }; // class CodeBlockParser
ferencd@0: 
ferencd@0: // -----------------------------------------------------------------------------
ferencd@0: 
ferencd@0: } // namespace maddy