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

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

CodeMirror.defineMode("pug", function (config) {
  // token types
  var KEYWORD = 'keyword';
  var DOCTYPE = 'meta';
  var ID = 'builtin';
  var CLASS = 'qualifier';

  var ATTRS_NEST = {
    '{': '}',
    '(': ')',
    '[': ']'
  };

  var jsMode = CodeMirror.getMode(config, 'javascript');

  function State() {
    this.javaScriptLine = false;
    this.javaScriptLineExcludesColon = false;

    this.javaScriptArguments = false;
    this.javaScriptArgumentsDepth = 0;

    this.isInterpolating = false;
    this.interpolationNesting = 0;

    this.jsState = CodeMirror.startState(jsMode);

    this.restOfLine = '';

    this.isIncludeFiltered = false;
    this.isEach = false;

    this.lastTag = '';
    this.scriptType = '';

    // Attributes Mode
    this.isAttrs = false;
    this.attrsNest = [];
    this.inAttributeName = true;
    this.attributeIsType = false;
    this.attrValue = '';

    // Indented Mode
    this.indentOf = Infinity;
    this.indentToken = '';

    this.innerMode = null;
    this.innerState = null;

    this.innerModeForLine = false;
  }
  /**
   * Safely copy a state
   *
   * @return {State}
   */
  State.prototype.copy = function () {
    var res = new State();
    res.javaScriptLine = this.javaScriptLine;
    res.javaScriptLineExcludesColon = this.javaScriptLineExcludesColon;
    res.javaScriptArguments = this.javaScriptArguments;
    res.javaScriptArgumentsDepth = this.javaScriptArgumentsDepth;
    res.isInterpolating = this.isInterpolating;
    res.interpolationNesting = this.interpolationNesting;

    res.jsState = CodeMirror.copyState(jsMode, this.jsState);

    res.innerMode = this.innerMode;
    if (this.innerMode && this.innerState) {
      res.innerState = CodeMirror.copyState(this.innerMode, this.innerState);
    }

    res.restOfLine = this.restOfLine;

    res.isIncludeFiltered = this.isIncludeFiltered;
    res.isEach = this.isEach;
    res.lastTag = this.lastTag;
    res.scriptType = this.scriptType;
    res.isAttrs = this.isAttrs;
    res.attrsNest = this.attrsNest.slice();
    res.inAttributeName = this.inAttributeName;
    res.attributeIsType = this.attributeIsType;
    res.attrValue = this.attrValue;
    res.indentOf = this.indentOf;
    res.indentToken = this.indentToken;

    res.innerModeForLine = this.innerModeForLine;

    return res;
  };

  function javaScript(stream, state) {
    if (stream.sol()) {
      // if javaScriptLine was set at end of line, ignore it
      state.javaScriptLine = false;
      state.javaScriptLineExcludesColon = false;
    }
    if (state.javaScriptLine) {
      if (state.javaScriptLineExcludesColon && stream.peek() === ':') {
        state.javaScriptLine = false;
        state.javaScriptLineExcludesColon = false;
        return;
      }
      var tok = jsMode.token(stream, state.jsState);
      if (stream.eol()) state.javaScriptLine = false;
      return tok || true;
    }
  }
  function javaScriptArguments(stream, state) {
    if (state.javaScriptArguments) {
      if (state.javaScriptArgumentsDepth === 0 && stream.peek() !== '(') {
        state.javaScriptArguments = false;
        return;
      }
      if (stream.peek() === '(') {
        state.javaScriptArgumentsDepth++;
      } else if (stream.peek() === ')') {
        state.javaScriptArgumentsDepth--;
      }
      if (state.javaScriptArgumentsDepth === 0) {
        state.javaScriptArguments = false;
        return;
      }

      var tok = jsMode.token(stream, state.jsState);
      return tok || true;
    }
  }

  function yieldStatement(stream) {
    if (stream.match(/^yield\b/)) {
        return 'keyword';
    }
  }

  function doctype(stream) {
    if (stream.match(/^(?:doctype) *([^\n]+)?/)) {
        return DOCTYPE;
    }
  }

  function interpolation(stream, state) {
    if (stream.match('#{')) {
      state.isInterpolating = true;
      state.interpolationNesting = 0;
      return 'punctuation';
    }
  }

  function interpolationContinued(stream, state) {
    if (state.isInterpolating) {
      if (stream.peek() === '}') {
        state.interpolationNesting--;
        if (state.interpolationNesting < 0) {
          stream.next();
          state.isInterpolating = false;
          return 'punctuation';
        }
      } else if (stream.peek() === '{') {
        state.interpolationNesting++;
      }
      return jsMode.token(stream, state.jsState) || true;
    }
  }

  function caseStatement(stream, state) {
    if (stream.match(/^case\b/)) {
      state.javaScriptLine = true;
      return KEYWORD;
    }
  }

  function when(stream, state) {
    if (stream.match(/^when\b/)) {
      state.javaScriptLine = true;
      state.javaScriptLineExcludesColon = true;
      return KEYWORD;
    }
  }

  function defaultStatement(stream) {
    if (stream.match(/^default\b/)) {
      return KEYWORD;
    }
  }

  function extendsStatement(stream, state) {
    if (stream.match(/^extends?\b/)) {
      state.restOfLine = 'string';
      return KEYWORD;
    }
  }

  function append(stream, state) {
    if (stream.match(/^append\b/)) {
      state.restOfLine = 'variable';
      return KEYWORD;
    }
  }
  function prepend(stream, state) {
    if (stream.match(/^prepend\b/)) {
      state.restOfLine = 'variable';
      return KEYWORD;
    }
  }
  function block(stream, state) {
    if (stream.match(/^block\b *(?:(prepend|append)\b)?/)) {
      state.restOfLine = 'variable';
      return KEYWORD;
    }
  }

  function include(stream, state) {
    if (stream.match(/^include\b/)) {
      state.restOfLine = 'string';
      return KEYWORD;
    }
  }

  function includeFiltered(stream, state) {
    if (stream.match(/^include:([a-zA-Z0-9\-]+)/, false) && stream.match('include')) {
      state.isIncludeFiltered = true;
      return KEYWORD;
    }
  }

  function includeFilteredContinued(stream, state) {
    if (state.isIncludeFiltered) {
      var tok = filter(stream, state);
      state.isIncludeFiltered = false;
      state.restOfLine = 'string';
      return tok;
    }
  }

  function mixin(stream, state) {
    if (stream.match(/^mixin\b/)) {
      state.javaScriptLine = true;
      return KEYWORD;
    }
  }

  function call(stream, state) {
    if (stream.match(/^\+([-\w]+)/)) {
      if (!stream.match(/^\( *[-\w]+ *=/, false)) {
        state.javaScriptArguments = true;
        state.javaScriptArgumentsDepth = 0;
      }
      return 'variable';
    }
    if (stream.match(/^\+#{/, false)) {
      stream.next();
      state.mixinCallAfter = true;
      return interpolation(stream, state);
    }
  }
  function callArguments(stream, state) {
    if (state.mixinCallAfter) {
      state.mixinCallAfter = false;
      if (!stream.match(/^\( *[-\w]+ *=/, false)) {
        state.javaScriptArguments = true;
        state.javaScriptArgumentsDepth = 0;
      }
      return true;
    }
  }

  function conditional(stream, state) {
    if (stream.match(/^(if|unless|else if|else)\b/)) {
      state.javaScriptLine = true;
      return KEYWORD;
    }
  }

  function each(stream, state) {
    if (stream.match(/^(- *)?(each|for)\b/)) {
      state.isEach = true;
      return KEYWORD;
    }
  }
  function eachContinued(stream, state) {
    if (state.isEach) {
      if (stream.match(/^ in\b/)) {
        state.javaScriptLine = true;
        state.isEach = false;
        return KEYWORD;
      } else if (stream.sol() || stream.eol()) {
        state.isEach = false;
      } else if (stream.next()) {
        while (!stream.match(/^ in\b/, false) && stream.next());
        return 'variable';
      }
    }
  }

  function whileStatement(stream, state) {
    if (stream.match(/^while\b/)) {
      state.javaScriptLine = true;
      return KEYWORD;
    }
  }

  function tag(stream, state) {
    var captures;
    if (captures = stream.match(/^(\w(?:[-:\w]*\w)?)\/?/)) {
      state.lastTag = captures[1].toLowerCase();
      if (state.lastTag === 'script') {
        state.scriptType = 'application/javascript';
      }
      return 'tag';
    }
  }

  function filter(stream, state) {
    if (stream.match(/^:([\w\-]+)/)) {
      var innerMode;
      if (config && config.innerModes) {
        innerMode = config.innerModes(stream.current().substring(1));
      }
      if (!innerMode) {
        innerMode = stream.current().substring(1);
      }
      if (typeof innerMode === 'string') {
        innerMode = CodeMirror.getMode(config, innerMode);
      }
      setInnerMode(stream, state, innerMode);
      return 'atom';
    }
  }

  function code(stream, state) {
    if (stream.match(/^(!?=|-)/)) {
      state.javaScriptLine = true;
      return 'punctuation';
    }
  }

  function id(stream) {
    if (stream.match(/^#([\w-]+)/)) {
      return ID;
    }
  }

  function className(stream) {
    if (stream.match(/^\.([\w-]+)/)) {
      return CLASS;
    }
  }

  function attrs(stream, state) {
    if (stream.peek() == '(') {
      stream.next();
      state.isAttrs = true;
      state.attrsNest = [];
      state.inAttributeName = true;
      state.attrValue = '';
      state.attributeIsType = false;
      return 'punctuation';
    }
  }

  function attrsContinued(stream, state) {
    if (state.isAttrs) {
      if (ATTRS_NEST[stream.peek()]) {
        state.attrsNest.push(ATTRS_NEST[stream.peek()]);
      }
      if (state.attrsNest[state.attrsNest.length - 1] === stream.peek()) {
        state.attrsNest.pop();
      } else  if (stream.eat(')')) {
        state.isAttrs = false;
        return 'punctuation';
      }
      if (state.inAttributeName && stream.match(/^[^=,\)!]+/)) {
        if (stream.peek() === '=' || stream.peek() === '!') {
          state.inAttributeName = false;
          state.jsState = CodeMirror.startState(jsMode);
          if (state.lastTag === 'script' && stream.current().trim().toLowerCase() === 'type') {
            state.attributeIsType = true;
          } else {
            state.attributeIsType = false;
          }
        }
        return 'attribute';
      }

      var tok = jsMode.token(stream, state.jsState);
      if (state.attributeIsType && tok === 'string') {
        state.scriptType = stream.current().toString();
      }
      if (state.attrsNest.length === 0 && (tok === 'string' || tok === 'variable' || tok === 'keyword')) {
        try {
          Function('', 'var x ' + state.attrValue.replace(/,\s*$/, '').replace(/^!/, ''));
          state.inAttributeName = true;
          state.attrValue = '';
          stream.backUp(stream.current().length);
          return attrsContinued(stream, state);
        } catch (ex) {
          //not the end of an attribute
        }
      }
      state.attrValue += stream.current();
      return tok || true;
    }
  }

  function attributesBlock(stream, state) {
    if (stream.match(/^&attributes\b/)) {
      state.javaScriptArguments = true;
      state.javaScriptArgumentsDepth = 0;
      return 'keyword';
    }
  }

  function indent(stream) {
    if (stream.sol() && stream.eatSpace()) {
      return 'indent';
    }
  }

  function comment(stream, state) {
    if (stream.match(/^ *\/\/(-)?([^\n]*)/)) {
      state.indentOf = stream.indentation();
      state.indentToken = 'comment';
      return 'comment';
    }
  }

  function colon(stream) {
    if (stream.match(/^: */)) {
      return 'colon';
    }
  }

  function text(stream, state) {
    if (stream.match(/^(?:\| ?| )([^\n]+)/)) {
      return 'string';
    }
    if (stream.match(/^(<[^\n]*)/, false)) {
      // html string
      setInnerMode(stream, state, 'htmlmixed');
      state.innerModeForLine = true;
      return innerMode(stream, state, true);
    }
  }

  function dot(stream, state) {
    if (stream.eat('.')) {
      var innerMode = null;
      if (state.lastTag === 'script' && state.scriptType.toLowerCase().indexOf('javascript') != -1) {
        innerMode = state.scriptType.toLowerCase().replace(/"|'/g, '');
      } else if (state.lastTag === 'style') {
        innerMode = 'css';
      }
      setInnerMode(stream, state, innerMode);
      return 'dot';
    }
  }

  function fail(stream) {
    stream.next();
    return null;
  }


  function setInnerMode(stream, state, mode) {
    mode = CodeMirror.mimeModes[mode] || mode;
    mode = config.innerModes ? config.innerModes(mode) || mode : mode;
    mode = CodeMirror.mimeModes[mode] || mode;
    mode = CodeMirror.getMode(config, mode);
    state.indentOf = stream.indentation();

    if (mode && mode.name !== 'null') {
      state.innerMode = mode;
    } else {
      state.indentToken = 'string';
    }
  }
  function innerMode(stream, state, force) {
    if (stream.indentation() > state.indentOf || (state.innerModeForLine && !stream.sol()) || force) {
      if (state.innerMode) {
        if (!state.innerState) {
          state.innerState = state.innerMode.startState ? CodeMirror.startState(state.innerMode, stream.indentation()) : {};
        }
        return stream.hideFirstChars(state.indentOf + 2, function () {
          return state.innerMode.token(stream, state.innerState) || true;
        });
      } else {
        stream.skipToEnd();
        return state.indentToken;
      }
    } else if (stream.sol()) {
      state.indentOf = Infinity;
      state.indentToken = null;
      state.innerMode = null;
      state.innerState = null;
    }
  }
  function restOfLine(stream, state) {
    if (stream.sol()) {
      // if restOfLine was set at end of line, ignore it
      state.restOfLine = '';
    }
    if (state.restOfLine) {
      stream.skipToEnd();
      var tok = state.restOfLine;
      state.restOfLine = '';
      return tok;
    }
  }


  function startState() {
    return new State();
  }
  function copyState(state) {
    return state.copy();
  }
  /**
   * Get the next token in the stream
   *
   * @param {Stream} stream
   * @param {State} state
   */
  function nextToken(stream, state) {
    var tok = innerMode(stream, state)
      || restOfLine(stream, state)
      || interpolationContinued(stream, state)
      || includeFilteredContinued(stream, state)
      || eachContinued(stream, state)
      || attrsContinued(stream, state)
      || javaScript(stream, state)
      || javaScriptArguments(stream, state)
      || callArguments(stream, state)

      || yieldStatement(stream, state)
      || doctype(stream, state)
      || interpolation(stream, state)
      || caseStatement(stream, state)
      || when(stream, state)
      || defaultStatement(stream, state)
      || extendsStatement(stream, state)
      || append(stream, state)
      || prepend(stream, state)
      || block(stream, state)
      || include(stream, state)
      || includeFiltered(stream, state)
      || mixin(stream, state)
      || call(stream, state)
      || conditional(stream, state)
      || each(stream, state)
      || whileStatement(stream, state)
      || tag(stream, state)
      || filter(stream, state)
      || code(stream, state)
      || id(stream, state)
      || className(stream, state)
      || attrs(stream, state)
      || attributesBlock(stream, state)
      || indent(stream, state)
      || text(stream, state)
      || comment(stream, state)
      || colon(stream, state)
      || dot(stream, state)
      || fail(stream, state);

    return tok === true ? null : tok;
  }
  return {
    startState: startState,
    copyState: copyState,
    token: nextToken
  };
}, 'javascript', 'css', 'htmlmixed');

CodeMirror.defineMIME('text/x-pug', 'pug');
CodeMirror.defineMIME('text/x-jade', 'pug');

});