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✏️ Editing: ruby.js

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

(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";

function wordObj(words) {
  var o = {};
  for (var i = 0, e = words.length; i < e; ++i) o[words[i]] = true;
  return o;
}

var keywordList = [
  "alias", "and", "BEGIN", "begin", "break", "case", "class", "def", "defined?", "do", "else",
  "elsif", "END", "end", "ensure", "false", "for", "if", "in", "module", "next", "not", "or",
  "redo", "rescue", "retry", "return", "self", "super", "then", "true", "undef", "unless",
  "until", "when", "while", "yield", "nil", "raise", "throw", "catch", "fail", "loop", "callcc",
  "caller", "lambda", "proc", "public", "protected", "private", "require", "load",
  "require_relative", "extend", "autoload", "__END__", "__FILE__", "__LINE__", "__dir__"
], keywords = wordObj(keywordList);

CodeMirror.defineMode("ruby", function(config) {
  var curPunc;

function chain(newtok, stream, state) {
    state.tokenize.push(newtok);
    return newtok(stream, state);
  }

// :> :>> :< :<< are valid symbols
      if (stream.eat(/[\<\>]/)) {
        stream.eat(/[\<\>]/);
        return "atom";
      }

// :+ :- :/ :* :| :& :! are valid symbols
      if (stream.eat(/[\+\-\*\/\&\|\:\!]/)) {
        return "atom";
      }

// Symbols can't start by a digit
      if (stream.eat(/[a-zA-Z$@_\xa1-\uffff]/)) {
        stream.eatWhile(/[\w$\xa1-\uffff]/);
        // Only one ? ! = is allowed and only as the last character
        stream.eat(/[\?\!\=]/);
        return "atom";
      }
      return "operator";
    } else if (ch == "@" && stream.match(/^@?[a-zA-Z_\xa1-\uffff]/)) {
      stream.eat("@");
      stream.eatWhile(/[\w\xa1-\uffff]/);
      return "variable-2";
    } else if (ch == "$") {
      if (stream.eat(/[a-zA-Z_]/)) {
        stream.eatWhile(/[\w]/);
      } else if (stream.eat(/\d/)) {
        stream.eat(/\d/);
      } else {
        stream.next(); // Must be a special global like $: or $!
      }
      return "variable-3";
    } else if (/[a-zA-Z_\xa1-\uffff]/.test(ch)) {
      stream.eatWhile(/[\w\xa1-\uffff]/);
      stream.eat(/[\?\!]/);
      if (stream.eat(":")) return "atom";
      return "ident";
    } else if (ch == "|" && (state.varList || state.lastTok == "{" || state.lastTok == "do")) {
      curPunc = "|";
      return null;
    } else if (/[\[\]{}\\;]/.test(ch)) {
      curPunc = ch;
      return null;
    } else if (ch == "-" && stream.eat(">")) {
      return "arrow";
    } else if (/[=+\-\/*:\.^%<>~|]/.test(ch)) {
      var more = stream.eatWhile(/[=+\-\/*:\.^%<>~|]/);
      if (ch == "." && !more) curPunc = ".";
      return "operator";
    } else {
      return null;
    }
  }

function regexpAhead(stream) {
    var start = stream.pos, depth = 0, next, found = false, escaped = false
    while ((next = stream.next()) != null) {
      if (!escaped) {
        if ("[{(".indexOf(next) > -1) {
          depth++
        } else if ("]})".indexOf(next) > -1) {
          depth--
          if (depth < 0) break
        } else if (next == "/" && depth == 0) {
          found = true
          break
        }
        escaped = next == "\\"
      } else {
        escaped = false
      }
    }
    stream.backUp(stream.pos - start)
    return found
  }

if (state.context.type === 'read-quoted-paused') {
        state.context = state.context.prev;
        stream.eat("}");
      }

while ((ch = stream.next()) != null) {
        if (ch == quote && (unescaped || !escaped)) {
          state.tokenize.pop();
          break;
        }
        if (embed && ch == "#" && !escaped) {
          if (stream.eat("{")) {
            if (quote == "}") {
              state.context = {prev: state.context, type: 'read-quoted-paused'};
            }
            state.tokenize.push(tokenBaseUntilBrace());
            break;
          } else if (/[@\$]/.test(stream.peek())) {
            state.tokenize.push(tokenBaseOnce());
            break;
          }
        }
        escaped = !escaped && ch == "\\";
      }
      return style;
    };
  }
  function readHereDoc(phrase, mayIndent) {
    return function(stream, state) {
      if (mayIndent) stream.eatSpace()
      if (stream.match(phrase)) state.tokenize.pop();
      else stream.skipToEnd();
      return "string";
    };
  }
  function readBlockComment(stream, state) {
    if (stream.sol() && stream.match("=end") && stream.eol())
      state.tokenize.pop();
    stream.skipToEnd();
    return "comment";
  }

return {
    startState: function() {
      return {tokenize: [tokenBase],
              indented: 0,
              context: {type: "top", indented: -config.indentUnit},
              continuedLine: false,
              lastTok: null,
              varList: false};
    },

token: function(stream, state) {
      curPunc = null;
      if (stream.sol()) state.indented = stream.indentation();
      var style = state.tokenize[state.tokenize.length-1](stream, state), kwtype;
      var thisTok = curPunc;
      if (style == "ident") {
        var word = stream.current();
        style = state.lastTok == "." ? "property"
          : keywords.propertyIsEnumerable(stream.current()) ? "keyword"
          : /^[A-Z]/.test(word) ? "tag"
          : (state.lastTok == "def" || state.lastTok == "class" || state.varList) ? "def"
          : "variable";
        if (style == "keyword") {
          thisTok = word;
          if (indentWords.propertyIsEnumerable(word)) kwtype = "indent";
          else if (dedentWords.propertyIsEnumerable(word)) kwtype = "dedent";
          else if ((word == "if" || word == "unless") && stream.column() == stream.indentation())
            kwtype = "indent";
          else if (word == "do" && state.context.indented < state.indented)
            kwtype = "indent";
        }
      }
      if (curPunc || (style && style != "comment")) state.lastTok = thisTok;
      if (curPunc == "|") state.varList = !state.varList;

if (kwtype == "indent" || /[$\[\{]/.test(curPunc))
        state.context = {prev: state.context, type: curPunc || style, indented: state.indented};
      else if ((kwtype == "dedent" || /[$\]\}]/.test(curPunc)) && state.context.prev)
        state.context = state.context.prev;

if (stream.eol())
        state.continuedLine = (curPunc == "\\" || style == "operator");
      return style;
    },

indent: function(state, textAfter) {
      if (state.tokenize[state.tokenize.length-1] != tokenBase) return CodeMirror.Pass;
      var firstChar = textAfter && textAfter.charAt(0);
      var ct = state.context;
      var closed = ct.type == closing[firstChar] ||
        ct.type == "keyword" && /^(?:end|until|else|elsif|when|rescue)\b/.test(textAfter);
      return ct.indented + (closed ? 0 : config.indentUnit) +
        (state.continuedLine ? config.indentUnit : 0);
    },

electricInput: /^\s*(?:end|rescue|elsif|else|\})$/,
    lineComment: "#",
    fold: "indent"
  };
});

CodeMirror.defineMIME("text/x-ruby", "ruby");

CodeMirror.registerHelper("hintWords", "ruby", keywordList);

});

MR SKB