neutrinoscript/vendors/lljs/docs/vendor/cm/mode/javascript/javascript.js

Like C for Javascript

CodeMirror.defineMode('javascript', function(config, parserConfig) {
  var indentUnit = config.indentUnit;
  var jsonMode = parserConfig.json;

  // Tokenizer

  var keywords = function(){
    function kw(type) {return {type: type, style: 'keyword'};}
    var A = kw('keyword a'), B = kw('keyword b'), C = kw('keyword c');
    var operator = kw('operator'), atom = {type: 'atom', style: 'atom'};
    return {
      'if': A, 'while': A, 'with': A, 'else': B, 'do': B, 'try': B, 'finally': B,
      'return': C, 'break': C, 'continue': C, 'new': C, 'delete': C, 'throw': C,
      'var': kw('var'), 'const': kw('var'), 'let': kw('var'), 'extern': kw('var'),
      'function': kw('function'), 'catch': kw('catch'),
      'for': kw('for'), 'switch': kw('switch'), 'case': kw('case'), 'default': kw('default'),
      'in': operator, 'typeof': operator, 'instanceof': operator,
      'true': atom, 'false': atom, 'null': atom, 'undefined': atom, 'NaN': atom, 'Infinity': atom
    };
  }();

  var isOperatorChar = /[+\-*&%=<>!?|]/;

  function chain(stream, state, f) {
    state.tokenize = f;
    return f(stream, state);
  }

  function nextUntilUnescaped(stream, end) {
    var escaped = false, next;
    while ((next = stream.next()) != null) {
      if (next == end && !escaped)
        return false;
      escaped = !escaped && next == '\\';
    }
    return escaped;
  }

  // Used as scratch variables to communicate multiple values without
  // consing up tons of objects.
  var type, content;
  function ret(tp, style, cont) {
    type = tp; content = cont;
    return style;
  }

  function jsTokenBase(stream, state) {
    var ch = stream.next();
    if (ch == '"' || ch == '\'')
      return chain(stream, state, jsTokenString(ch));
    else if (/[\[\]{}\(\),;\:\.]/.test(ch))
      return ret(ch);
    else if (ch == '0' && stream.eat(/x/i)) {
      stream.eatWhile(/[\da-f]/i);
      return ret('number', 'number');
    }      
    else if (/\d/.test(ch) || ch == '-' && stream.eat(/\d/)) {
      stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/);
      return ret('number', 'number');
    }
    else if (ch == '/') {
      if (stream.eat('*')) {
        return chain(stream, state, jsTokenComment);
      }
      else if (stream.eat('/')) {
        stream.skipToEnd();
        return ret('comment', 'comment');
      }
      else if (state.reAllowed) {
        nextUntilUnescaped(stream, '/');
        stream.eatWhile(/[gimy]/); // 'y' is "sticky" option in Mozilla
        return ret('regexp', 'string-2');
      }
      else {
        stream.eatWhile(isOperatorChar);
        return ret('operator', null, stream.current());
      }
    }
    else if (ch == '#') {
      stream.skipToEnd();
      return ret('error', 'error');
    }
    else if (isOperatorChar.test(ch)) {
      stream.eatWhile(isOperatorChar);
      return ret('operator', null, stream.current());
    }
    else {
      stream.eatWhile(/[\w\$_]/);
      var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];
      return (known && state.kwAllowed) ? ret(known.type, known.style, word) :
        ret('variable', 'variable', word);
    }
  }

  function jsTokenString(quote) {
    return function(stream, state) {
      if (!nextUntilUnescaped(stream, quote))
        state.tokenize = jsTokenBase;
      return ret('string', 'string');
    };
  }

  function jsTokenComment(stream, state) {
    var maybeEnd = false, ch;
    while (ch = stream.next()) {
      if (ch == '/' && maybeEnd) {
        state.tokenize = jsTokenBase;
        break;
      }
      maybeEnd = (ch == '*');
    }
    return ret('comment', 'comment');
  }

  // Parser

  var atomicTypes = {'atom': true, 'number': true, 'variable': true, 'string': true, 'regexp': true};

  function JSLexical(indented, column, type, align, prev, info) {
    this.indented = indented;
    this.column = column;
    this.type = type;
    this.prev = prev;
    this.info = info;
    if (align != null) this.align = align;
  }

  function inScope(state, varname) {
    for (var v = state.localVars; v; v = v.next)
      if (v.name == varname) return true;
  }

  function parseJS(state, style, type, content, stream) {
    var cc = state.cc;
    // Communicate our context to the combinators.
    // (Less wasteful than consing up a hundred closures on every call.)
    cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc;
  
    if (!state.lexical.hasOwnProperty('align'))
      state.lexical.align = true;

    while(true) {
      var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
      if (combinator(type, content)) {
        while(cc.length && cc[cc.length - 1].lex)
          cc.pop()();
        if (cx.marked) return cx.marked;
        if (type == 'variable' && inScope(state, content)) return 'variable-2';
        return style;
      }
    }
  }

  // Combinator utils

  var cx = {state: null, column: null, marked: null, cc: null};
  function pass() {
    for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
  }
  function cont() {
    pass.apply(null, arguments);
    return true;
  }
  function register(varname) {
    var state = cx.state;
    if (state.context) {
      cx.marked = 'def';
      for (var v = state.localVars; v; v = v.next)
        if (v.name == varname) return;
      state.localVars = {name: varname, next: state.localVars};
    }
  }

  // Combinators

  var defaultVars = {name: 'this', next: {name: 'arguments'}};
  function pushcontext() {
    if (!cx.state.context) cx.state.localVars = defaultVars;
    cx.state.context = {prev: cx.state.context, vars: cx.state.localVars};
  }
  function popcontext() {
    cx.state.localVars = cx.state.context.vars;
    cx.state.context = cx.state.context.prev;
  }
  function pushlex(type, info) {
    var result = function() {
      var state = cx.state;
      state.lexical = new JSLexical(state.indented, cx.stream.column(), type, null, state.lexical, info);
    };
    result.lex = true;
    return result;
  }
  function poplex() {
    var state = cx.state;
    if (state.lexical.prev) {
      if (state.lexical.type == ')')
        state.indented = state.lexical.indented;
      state.lexical = state.lexical.prev;
    }
  }
  poplex.lex = true;

  function expect(wanted) {
    return function expecting(type) {
      if (type == wanted) return cont();
      else if (wanted == ';') return pass();
      else return cont(arguments.callee);
    };
  }

  function statement(type) {
    if (type == 'var') return cont(pushlex('vardef'), vardef1, expect(';'), poplex);
    if (type == 'keyword a') return cont(pushlex('form'), expression, statement, poplex);
    if (type == 'keyword b') return cont(pushlex('form'), statement, poplex);
    if (type == '{') return cont(pushlex('}'), block, poplex);
    if (type == ';') return cont();
    if (type == 'function') return cont(functiondef);
    if (type == 'for') return cont(pushlex('form'), expect('('), pushlex(')'), forspec1, expect(')'),
      poplex, statement, poplex);
    if (type == 'variable') return cont(pushlex('stat'), maybelabel);
    if (type == 'switch') return cont(pushlex('form'), expression, pushlex('}', 'switch'), expect('{'),
      block, poplex, poplex);
    if (type == 'case') return cont(expression, expect(':'));
    if (type == 'default') return cont(expect(':'));
    if (type == 'catch') return cont(pushlex('form'), pushcontext, expect('('), funarg, expect(')'),
      statement, poplex, popcontext);
    return pass(pushlex('stat'), expression, expect(';'), poplex);
  }
  function expression(type) {
    if (atomicTypes.hasOwnProperty(type)) return cont(maybeoperator);
    if (type == 'function') return cont(functiondef);
    if (type == 'keyword c') return cont(maybeexpression);
    if (type == '(') return cont(pushlex(')'), maybeexpression, expect(')'), poplex, maybeoperator);
    if (type == 'operator') return cont(expression);
    if (type == '[') return cont(pushlex(']'), commasep(expression, ']'), poplex, maybeoperator);
    if (type == '{') return cont(pushlex('}'), commasep(objprop, '}'), poplex, maybeoperator);
    return cont();
  }
  function maybeexpression(type) {
    if (type.match(/[;\}\)\],]/)) return pass();
    return pass(expression);
  }
    
  function maybeoperator(type, value) {
    if (type == 'operator' && /\+\+|--/.test(value)) return cont(maybeoperator);
    if (type == 'operator' || type == ':') return cont(expression);
    if (type == ';') return;
    if (type == '(') return cont(pushlex(')'), commasep(expression, ')'), poplex, maybeoperator);
    if (type == '.') return cont(property, maybeoperator);
    if (type == '[') return cont(pushlex(']'), expression, expect(']'), poplex, maybeoperator);
  }
  function maybelabel(type) {
    if (type == ':') return cont(poplex, statement);
    return pass(maybeoperator, expect(';'), poplex);
  }
  function property(type) {
    if (type == 'variable') {cx.marked = 'property'; return cont();}
  }
  function objprop(type) {
    if (type == 'variable') cx.marked = 'property';
    if (atomicTypes.hasOwnProperty(type)) return cont(expect(':'), expression);
  }
  function commasep(what, end) {
    function proceed(type) {
      if (type == ',') return cont(what, proceed);
      if (type == end) return cont();
      return cont(expect(end));
    }
    return function commaSeparated(type) {
      if (type == end) return cont();
      else return pass(what, proceed);
    };
  }
  function block(type) {
    if (type == '}') return cont();
    return pass(statement, block);
  }
  function vardef1(type, value) {
    if (type == 'variable'){register(value); return cont(vardef2);}
    return cont();
  }
  function vardef2(type, value) {
    if (value == '=') return cont(expression, vardef2);
    if (type == ',') return cont(vardef1);
  }
  function forspec1(type) {
    if (type == 'var') return cont(vardef1, forspec2);
    if (type == ';') return pass(forspec2);
    if (type == 'variable') return cont(formaybein);
    return pass(forspec2);
  }
  function formaybein(type, value) {
    if (value == 'in') return cont(expression);
    return cont(maybeoperator, forspec2);
  }
  function forspec2(type, value) {
    if (type == ';') return cont(forspec3);
    if (value == 'in') return cont(expression);
    return cont(expression, expect(';'), forspec3);
  }
  function forspec3(type) {
    if (type != ')') cont(expression);
  }
  function functiondef(type, value) {
    if (type == 'variable') {register(value); return cont(functiondef);}
    if (type == '(') return cont(pushlex(')'), pushcontext, commasep(funarg, ')'), poplex, statement, popcontext);
  }
  function funarg(type, value) {
    if (type == 'variable') {register(value); return cont();}
  }

  // Interface

  return {
    startState: function(basecolumn) {
      return {
        tokenize: jsTokenBase,
        reAllowed: true,
        kwAllowed: true,
        cc: [],
        lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, 'block', false),
        localVars: parserConfig.localVars,
        context: parserConfig.localVars && {vars: parserConfig.localVars},
        indented: 0
      };
    },

    token: function(stream, state) {
      if (stream.sol()) {
        if (!state.lexical.hasOwnProperty('align'))
          state.lexical.align = false;
        state.indented = stream.indentation();
      }
      if (stream.eatSpace()) return null;
      var style = state.tokenize(stream, state);
      if (type == 'comment') return style;
      state.reAllowed = !!(type == 'operator' || type == 'keyword c' || type.match(/^[\[{}\(,;:]$/));
      state.kwAllowed = type != '.';
      return parseJS(state, style, type, content, stream);
    },

    indent: function(state, textAfter) {
      if (state.tokenize != jsTokenBase) return 0;
      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical;
      if (lexical.type == 'stat' && firstChar == '}') lexical = lexical.prev;
      var type = lexical.type, closing = firstChar == type;
      if (type == 'vardef') return lexical.indented + 4;
      else if (type == 'form' && firstChar == '{') return lexical.indented;
      else if (type == 'stat' || type == 'form') return lexical.indented + indentUnit;
      else if (lexical.info == 'switch' && !closing)
        return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
      else if (lexical.align) return lexical.column + (closing ? 0 : 1);
      else return lexical.indented + (closing ? 0 : indentUnit);
    },

    electricChars: ':{}'
  };
});

CodeMirror.defineMIME('text/javascript', 'javascript');
CodeMirror.defineMIME('application/json', {name: 'javascript', json: true});