using maddy for markdown parsing

maddy/paragraphparser.h

@@ -0,0 +1,115 @@
+/*
+ * This project is licensed under the MIT license. For more information see the
+ * LICENSE file.
+ */
+#pragma once
+
+// -----------------------------------------------------------------------------
+
+#include <functional>
+#include <string>
+
+#include "maddy/blockparser.h"
+
+// -----------------------------------------------------------------------------
+
+namespace maddy {
+
+// -----------------------------------------------------------------------------
+
+/**
+ * ParagraphParser
+ *
+ * @class
+ */
+class ParagraphParser : public BlockParser
+{
+public:
+  /**
+   * ctor
+   *
+   * @method
+   * @param {std::function<void(std::string&)>} parseLineCallback
+   * @param {std::function<std::shared_ptr<BlockParser>(const std::string&
+   * line)>} getBlockParserForLineCallback
+   */
+  ParagraphParser(
+    std::function<void(std::string&)> parseLineCallback,
+    std::function<std::shared_ptr<BlockParser>(const std::string& line)>
+      getBlockParserForLineCallback,
+    bool isEnabled
+  )
+    : BlockParser(parseLineCallback, getBlockParserForLineCallback)
+    , isStarted(false)
+    , isFinished(false)
+    , isEnabled(isEnabled)
+  {}
+
+  /**
+   * IsStartingLine
+   *
+   * If the line is not empty, it will be a paragraph.
+   *
+   * This block parser has to always run as the last one!
+   *
+   * @method
+   * @param {const std::string&} line
+   * @return {bool}
+   */
+  static bool IsStartingLine(const std::string& line) { return !line.empty(); }
+
+  /**
+   * IsFinished
+   *
+   * An empty line will end the paragraph.
+   *
+   * @method
+   * @return {bool}
+   */
+  bool IsFinished() const override { return this->isFinished; }
+
+protected:
+  bool isInlineBlockAllowed() const override { return false; }
+
+  bool isLineParserAllowed() const override { return true; }
+
+  void parseBlock(std::string& line) override
+  {
+    if (this->isEnabled && !this->isStarted)
+    {
+      line = "<p>" + line + " ";
+      this->isStarted = true;
+      return;
+    }
+    else if (!this->isEnabled && !this->isStarted)
+    {
+      line += " ";
+      this->isStarted = true;
+      return;
+    }
+
+    if (this->isEnabled && line.empty())
+    {
+      line += "</p>";
+      this->isFinished = true;
+      return;
+    }
+    else if (!this->isEnabled && line.empty())
+    {
+      line += "<br/>";
+      this->isFinished = true;
+      return;
+    }
+
+    line += " ";
+  }
+
+private:
+  bool isStarted;
+  bool isFinished;
+  bool isEnabled;
+}; // class ParagraphParser
+
+// -----------------------------------------------------------------------------
+
+} // namespace maddy