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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

// mode(s) for the sequence chart dsl's mscgen, xù and msgenny
// For more information on mscgen, see the site of the original author:
// http://www.mcternan.me.uk/mscgen
//
// This mode for mscgen and the two derivative languages were
// originally made for use in the mscgen_js interpreter
// (https://sverweij.github.io/mscgen_js)

(function(mod) {
  if ( typeof exports == "object" && typeof module == "object")// CommonJS
    mod(require("../../lib/codemirror"));
  else if ( typeof define == "function" && define.amd)// AMD
    define(["../../lib/codemirror"], mod);
  else// Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
  "use strict";

  var languages = {
    mscgen: {
      "keywords" : ["msc"],
      "options" : ["hscale", "width", "arcgradient", "wordwraparcs"],
      "constants" : ["true", "false", "on", "off"],
      "attributes" : ["label", "idurl", "id", "url", "linecolor", "linecolour", "textcolor", "textcolour", "textbgcolor", "textbgcolour", "arclinecolor", "arclinecolour", "arctextcolor", "arctextcolour", "arctextbgcolor", "arctextbgcolour", "arcskip"],
      "brackets" : ["\\{", "\\}"], // [ and  ] are brackets too, but these get handled in with lists
      "arcsWords" : ["note", "abox", "rbox", "box"],
      "arcsOthers" : ["\\|\\|\\|", "\\.\\.\\.", "---", "--", "<->", "==", "<<=>>", "<=>", "\\.\\.", "<<>>", "::", "<:>", "->", "=>>", "=>", ">>", ":>", "<-", "<<=", "<=", "<<", "<:", "x-", "-x"],
      "singlecomment" : ["//", "#"],
      "operators" : ["="]
    },
    xu: {
      "keywords" : ["msc", "xu"],
      "options" : ["hscale", "width", "arcgradient", "wordwraparcs", "wordwrapentities", "watermark"],
      "constants" : ["true", "false", "on", "off", "auto"],
      "attributes" : ["label", "idurl", "id", "url", "linecolor", "linecolour", "textcolor", "textcolour", "textbgcolor", "textbgcolour", "arclinecolor", "arclinecolour", "arctextcolor", "arctextcolour", "arctextbgcolor", "arctextbgcolour", "arcskip", "title", "deactivate", "activate", "activation"],
      "brackets" : ["\\{", "\\}"],  // [ and  ] are brackets too, but these get handled in with lists
      "arcsWords" : ["note", "abox", "rbox", "box", "alt", "else", "opt", "break", "par", "seq", "strict", "neg", "critical", "ignore", "consider", "assert", "loop", "ref", "exc"],
      "arcsOthers" : ["\\|\\|\\|", "\\.\\.\\.", "---", "--", "<->", "==", "<<=>>", "<=>", "\\.\\.", "<<>>", "::", "<:>", "->", "=>>", "=>", ">>", ":>", "<-", "<<=", "<=", "<<", "<:", "x-", "-x"],
      "singlecomment" : ["//", "#"],
      "operators" : ["="]
    },
    msgenny: {
      "keywords" : null,
      "options" : ["hscale", "width", "arcgradient", "wordwraparcs", "wordwrapentities", "watermark"],
      "constants" : ["true", "false", "on", "off", "auto"],
      "attributes" : null,
      "brackets" : ["\\{", "\\}"],
      "arcsWords" : ["note", "abox", "rbox", "box", "alt", "else", "opt", "break", "par", "seq", "strict", "neg", "critical", "ignore", "consider", "assert", "loop", "ref", "exc"],
      "arcsOthers" : ["\\|\\|\\|", "\\.\\.\\.", "---", "--", "<->", "==", "<<=>>", "<=>", "\\.\\.", "<<>>", "::", "<:>", "->", "=>>", "=>", ">>", ":>", "<-", "<<=", "<=", "<<", "<:", "x-", "-x"],
      "singlecomment" : ["//", "#"],
      "operators" : ["="]
    }
  }

  CodeMirror.defineMode("mscgen", function(_, modeConfig) {
    var language = languages[modeConfig && modeConfig.language || "mscgen"]
    return {
      startState: startStateFn,
      copyState: copyStateFn,
      token: produceTokenFunction(language),
      lineComment : "#",
      blockCommentStart : "/*",
      blockCommentEnd : "*/"
    };
  });

  CodeMirror.defineMIME("text/x-mscgen", "mscgen");
  CodeMirror.defineMIME("text/x-xu", {name: "mscgen", language: "xu"});
  CodeMirror.defineMIME("text/x-msgenny", {name: "mscgen", language: "msgenny"});

  function wordRegexpBoundary(pWords) {
    return new RegExp("\\b(" + pWords.join("|") + ")\\b", "i");
  }

  function wordRegexp(pWords) {
    return new RegExp("(" + pWords.join("|") + ")", "i");
  }

  function startStateFn() {
    return {
      inComment : false,
      inString : false,
      inAttributeList : false,
      inScript : false
    };
  }

  function copyStateFn(pState) {
    return {
      inComment : pState.inComment,
      inString : pState.inString,
      inAttributeList : pState.inAttributeList,
      inScript : pState.inScript
    };
  }

  function produceTokenFunction(pConfig) {

    return function(pStream, pState) {
      if (pStream.match(wordRegexp(pConfig.brackets), true, true)) {
        return "bracket";
      }
      /* comments */
      if (!pState.inComment) {
        if (pStream.match(/\/\*[^\*\/]*/, true, true)) {
          pState.inComment = true;
          return "comment";
        }
        if (pStream.match(wordRegexp(pConfig.singlecomment), true, true)) {
          pStream.skipToEnd();
          return "comment";
        }
      }
      if (pState.inComment) {
        if (pStream.match(/[^\*\/]*\*\//, true, true))
          pState.inComment = false;
        else
          pStream.skipToEnd();
        return "comment";
      }
      /* strings */
      if (!pState.inString && pStream.match(/\"(\\\"|[^\"])*/, true, true)) {
        pState.inString = true;
        return "string";
      }
      if (pState.inString) {
        if (pStream.match(/[^\"]*\"/, true, true))
          pState.inString = false;
        else
          pStream.skipToEnd();
        return "string";
      }
      /* keywords & operators */
      if (!!pConfig.keywords && pStream.match(wordRegexpBoundary(pConfig.keywords), true, true))
        return "keyword";

      if (pStream.match(wordRegexpBoundary(pConfig.options), true, true))
        return "keyword";

      if (pStream.match(wordRegexpBoundary(pConfig.arcsWords), true, true))
        return "keyword";

      if (pStream.match(wordRegexp(pConfig.arcsOthers), true, true))
        return "keyword";

      if (!!pConfig.operators && pStream.match(wordRegexp(pConfig.operators), true, true))
        return "operator";

      if (!!pConfig.constants && pStream.match(wordRegexp(pConfig.constants), true, true))
        return "variable";

      /* attribute lists */
      if (!pConfig.inAttributeList && !!pConfig.attributes && pStream.match(/\[/, true, true)) {
        pConfig.inAttributeList = true;
        return "bracket";
      }
      if (pConfig.inAttributeList) {
        if (pConfig.attributes !== null && pStream.match(wordRegexpBoundary(pConfig.attributes), true, true)) {
          return "attribute";
        }
        if (pStream.match(/]/, true, true)) {
          pConfig.inAttributeList = false;
          return "bracket";
        }
      }

      pStream.next();
      return "base";
    };
  }

});