text: /*jshint curly:true, eqeqeq:true, laxbreak:true, noempty:false */
  /*
  
    The MIT License (MIT)
  
    Copyright (c) 2007-2017 Einar Lielmanis, Liam Newman, and contributors.
  
    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation files
    (the "Software"), to deal in the Software without restriction,
    including without limitation the rights to use, copy, modify, merge,
    publish, distribute, sublicense, and/or sell copies of the Software,
    and to permit persons to whom the Software is furnished to do so,
    subject to the following conditions:
  
    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.
  
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
    BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
    ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    SOFTWARE.
  */
  
  var mergeOpts = require('core/options').mergeOpts;
  var acorn = require('core/acorn');
  var Output = require('core/output').Output;
  
  
  var lineBreak = acorn.lineBreak;
  var allLineBreaks = acorn.allLineBreaks;
  
  function Beautifier(source_text, options) {
      options = options || {};
  
      // Allow the setting of language/file-type specific options
      // with inheritance of overall settings
      options = mergeOpts(options, 'css');
  
      source_text = source_text || '';
  
      var newlinesFromLastWSEat = 0;
      var indentSize = options.indent_size ? parseInt(options.indent_size, 10) : 4;
      var indentCharacter = options.indent_char || ' ';
      var preserve_newlines = (options.preserve_newlines === undefined) ? false : options.preserve_newlines;
      var selectorSeparatorNewline = (options.selector_separator_newline === undefined) ? true : options.selector_separator_newline;
      var end_with_newline = (options.end_with_newline === undefined) ? false : options.end_with_newline;
      var newline_between_rules = (options.newline_between_rules === undefined) ? true : options.newline_between_rules;
      var space_around_combinator = (options.space_around_combinator === undefined) ? false : options.space_around_combinator;
      space_around_combinator = space_around_combinator || ((options.space_around_selector_separator === undefined) ? false : options.space_around_selector_separator);
      var eol = options.eol ? options.eol : 'auto';
  
      if (options.indent_with_tabs) {
          indentCharacter = '\t';
          indentSize = 1;
      }
  
      if (eol === 'auto') {
          eol = '\n';
          if (source_text && lineBreak.test(source_text || '')) {
              eol = source_text.match(lineBreak)[0];
          }
      }
  
      eol = eol.replace(/\\r/, '\r').replace(/\\n/, '\n');
  
      // HACK: newline parsing inconsistent. This brute force normalizes the input.
      source_text = source_text.replace(allLineBreaks, '\n');
  
      // tokenizer
      var whiteRe = /^\s+$/;
  
      var pos = -1,
          ch;
      var parenLevel = 0;
  
      function next() {
          ch = source_text.charAt(++pos);
          return ch || '';
      }
  
      function peek(skipWhitespace) {
          var result = '';
          var prev_pos = pos;
          if (skipWhitespace) {
              eatWhitespace();
          }
          result = source_text.charAt(pos + 1) || '';
          pos = prev_pos - 1;
          next();
          return result;
      }
  
      function eatString(endChars) {
          var start = pos;
          while (next()) {
              if (ch === "\\") {
                  next();
              } else if (endChars.indexOf(ch) !== -1) {
                  break;
              } else if (ch === "\n") {
                  break;
              }
          }
          return source_text.substring(start, pos + 1);
      }
  
      function peekString(endChar) {
          var prev_pos = pos;
          var str = eatString(endChar);
          pos = prev_pos - 1;
          next();
          return str;
      }
  
      function eatWhitespace(preserve_newlines_local) {
          var result = 0;
          while (whiteRe.test(peek())) {
              next();
              if (ch === '\n' && preserve_newlines_local && preserve_newlines) {
                  output.add_new_line(true);
                  result++;
              }
          }
          newlinesFromLastWSEat = result;
          return result;
      }
  
      function skipWhitespace() {
          var result = '';
          if (ch && whiteRe.test(ch)) {
              result = ch;
          }
          while (whiteRe.test(next())) {
              result += ch;
          }
          return result;
      }
  
      function eatComment() {
          var start = pos;
          var singleLine = peek() === "/";
          next();
          while (next()) {
              if (!singleLine && ch === "*" && peek() === "/") {
                  next();
                  break;
              } else if (singleLine && ch === "\n") {
                  return source_text.substring(start, pos);
              }
          }
  
          return source_text.substring(start, pos) + ch;
      }
  
  
      function lookBack(str) {
          return source_text.substring(pos - str.length, pos).toLowerCase() ===
              str;
      }
  
      // Nested pseudo-class if we are insideRule
      // and the next special character found opens
      // a new block
      function foundNestedPseudoClass() {
          var openParen = 0;
          for (var i = pos + 1; i < source_text.length; i++) {
              var ch = source_text.charAt(i);
              if (ch === "{") {
                  return true;
              } else if (ch === '(') {
                  // pseudoclasses can contain ()
                  openParen += 1;
              } else if (ch === ')') {
                  if (openParen === 0) {
                      return false;
                  }
                  openParen -= 1;
              } else if (ch === ";" || ch === "}") {
                  return false;
              }
          }
          return false;
      }
  
      // printer
      var baseIndentString = '';
      var preindent_index = 0;
      if (source_text && source_text.length) {
          while ((source_text.charAt(preindent_index) === ' ' ||
                  source_text.charAt(preindent_index) === '\t')) {
              preindent_index += 1;
          }
          baseIndentString = source_text.substring(0, preindent_index);
          js_source_text = source_text.substring(preindent_index);
      }
  
  
      var singleIndent = new Array(indentSize + 1).join(indentCharacter);
      var indentLevel;
      var nestedLevel;
      var output;
  
      function print_string(output_string) {
          if (output.just_added_newline()) {
              output.set_indent(indentLevel);
          }
          output.add_token(output_string);
      }
  
      function preserveSingleSpace(isAfterSpace) {
          if (isAfterSpace) {
              output.space_before_token = true;
          }
      }
  
      function indent() {
          indentLevel++;
      }
  
      function outdent() {
          if (indentLevel > 0) {
              indentLevel--;
          }
      }
  
      /*_____________________--------------------_____________________*/
  
      this.beautify = function() {
          // reset
          output = new Output(singleIndent, baseIndentString);
          indentLevel = 0;
          nestedLevel = 0;
  
          pos = -1;
          ch = null;
          parenLevel = 0;
  
          var insideRule = false;
          var insidePropertyValue = false;
          var enteringConditionalGroup = false;
          var top_ch = '';
          var last_top_ch = '';
  
          while (true) {
              var whitespace = skipWhitespace();
              var isAfterSpace = whitespace !== '';
              var isAfterNewline = whitespace.indexOf('\n') !== -1;
              last_top_ch = top_ch;
              top_ch = ch;
  
              if (!ch) {
                  break;
              } else if (ch === '/' && peek() === '*') { /* css comment */
                  var header = indentLevel === 0;
  
                  if (isAfterNewline || header) {
                      output.add_new_line();
                  }
  
                  print_string(eatComment());
                  output.add_new_line();
                  if (header) {
                      output.add_new_line(true);
                  }
              } else if (ch === '/' && peek() === '/') { // single line comment
                  if (!isAfterNewline && last_top_ch !== '{') {
                      output.trim(true);
                  }
                  output.space_before_token = true;
                  print_string(eatComment());
                  output.add_new_line();
              } else if (ch === '@') {
                  preserveSingleSpace(isAfterSpace);
  
                  // deal with less propery mixins @{...}
                  if (peek() === '{') {
                      print_string(eatString('}'));
                  } else {
                      print_string(ch);
  
                      // strip trailing space, if present, for hash property checks
                      var variableOrRule = peekString(": ,;{}()[]/='\"");
  
                      if (variableOrRule.match(/[ :]$/)) {
                          // we have a variable or pseudo-class, add it and insert one space before continuing
                          next();
                          variableOrRule = eatString(": ").replace(/\s$/, '');
                          print_string(variableOrRule);
                          output.space_before_token = true;
                      }
  
                      variableOrRule = variableOrRule.replace(/\s$/, '');
  
                      // might be a nesting at-rule
                      if (variableOrRule in this.NESTED_AT_RULE) {
                          nestedLevel += 1;
                          if (variableOrRule in this.CONDITIONAL_GROUP_RULE) {
                              enteringConditionalGroup = true;
                          }
                      }
                  }
              } else if (ch === '#' && peek() === '{') {
                  preserveSingleSpace(isAfterSpace);
                  print_string(eatString('}'));
              } else if (ch === '{') {
                  if (peek(true) === '}') {
                      eatWhitespace();
                      next();
                      output.space_before_token = true;
                      print_string("{}");
                      if (!eatWhitespace(true)) {
                          output.add_new_line();
                      }
  
                      if (newlinesFromLastWSEat < 2 && newline_between_rules && indentLevel === 0) {
                          output.add_new_line(true);
                      }
                  } else {
                      indent();
                      output.space_before_token = true;
                      print_string(ch);
                      if (!eatWhitespace(true)) {
                          output.add_new_line();
                      }
  
                      // when entering conditional groups, only rulesets are allowed
                      if (enteringConditionalGroup) {
                          enteringConditionalGroup = false;
                          insideRule = (indentLevel > nestedLevel);
                      } else {
                          // otherwise, declarations are also allowed
                          insideRule = (indentLevel >= nestedLevel);
                      }
                  }
              } else if (ch === '}') {
                  outdent();
                  output.add_new_line();
                  print_string(ch);
                  insideRule = false;
                  insidePropertyValue = false;
                  if (nestedLevel) {
                      nestedLevel--;
                  }
  
                  if (!eatWhitespace(true)) {
                      output.add_new_line();
                  }
  
                  if (newlinesFromLastWSEat < 2 && newline_between_rules && indentLevel === 0) {
                      output.add_new_line(true);
                  }
              } else if (ch === ":") {
                  eatWhitespace();
                  if ((insideRule || enteringConditionalGroup) &&
                      !(lookBack("&") || foundNestedPseudoClass()) &&
                      !lookBack("(")) {
                      // 'property: value' delimiter
                      // which could be in a conditional group query
                      print_string(':');
                      if (!insidePropertyValue) {
                          insidePropertyValue = true;
                          output.space_before_token = true;
                      }
                  } else {
                      // sass/less parent reference don't use a space
                      // sass nested pseudo-class don't use a space
  
                      // preserve space before pseudoclasses/pseudoelements, as it means "in any child"
                      if (lookBack(" ")) {
                          output.space_before_token = true;
                      }
                      if (peek() === ":") {
                          // pseudo-element
                          next();
                          print_string("::");
                      } else {
                          // pseudo-class
                          print_string(':');
                      }
                  }
              } else if (ch === '"' || ch === '\'') {
                  preserveSingleSpace(isAfterSpace);
                  print_string(eatString(ch));
              } else if (ch === ';') {
                  insidePropertyValue = false;
                  print_string(ch);
                  if (!eatWhitespace(true)) {
                      output.add_new_line();
                  }
              } else if (ch === '(') { // may be a url
                  if (lookBack("url")) {
                      print_string(ch);
                      eatWhitespace();
                      if (next()) {
                          if (ch !== ')' && ch !== '"' && ch !== '\'') {
                              print_string(eatString(')'));
                          } else {
                              pos--;
                          }
                      }
                  } else {
                      parenLevel++;
                      preserveSingleSpace(isAfterSpace);
                      print_string(ch);
                      eatWhitespace();
                  }
              } else if (ch === ')') {
                  print_string(ch);
                  parenLevel--;
              } else if (ch === ',') {
                  print_string(ch);
                  if (!eatWhitespace(true) && selectorSeparatorNewline && !insidePropertyValue && parenLevel < 1) {
                      output.add_new_line();
                  } else {
                      output.space_before_token = true;
                  }
              } else if ((ch === '>' || ch === '+' || ch === '~') &&
                  !insidePropertyValue && parenLevel < 1) {
                  //handle combinator spacing
                  if (space_around_combinator) {
                      output.space_before_token = true;
                      print_string(ch);
                      output.space_before_token = true;
                  } else {
                      print_string(ch);
                      eatWhitespace();
                      // squash extra whitespace
                      if (ch && whiteRe.test(ch)) {
                          ch = '';
                      }
                  }
              } else if (ch === ']') {
                  print_string(ch);
              } else if (ch === '[') {
                  preserveSingleSpace(isAfterSpace);
                  print_string(ch);
              } else if (ch === '=') { // no whitespace before or after
                  eatWhitespace();
                  print_string('=');
                  if (whiteRe.test(ch)) {
                      ch = '';
                  }
  
              } else {
                  preserveSingleSpace(isAfterSpace);
                  print_string(ch);
              }
          }
  
          var sweetCode = output.get_code(end_with_newline, eol);
  
          return sweetCode;
      };
  
      // https://developer.mozilla.org/en-US/docs/Web/CSS/At-rule
      this.NESTED_AT_RULE = {
          "@page": true,
          "@font-face": true,
          "@keyframes": true,
          // also in CONDITIONAL_GROUP_RULE below
          "@media": true,
          "@supports": true,
          "@document": true
      };
      this.CONDITIONAL_GROUP_RULE = {
          "@media": true,
          "@supports": true,
          "@document": true
      };
  }
  
  module.exports.Beautifier = Beautifier;
  