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var SUPPORTED_COMPACT_BLOCK_MATCHER = /^@media\W/;
var SUPPORTED_QUOTE_REMOVAL_MATCHER = /^@(?:keyframes|-moz-keyframes|-o-keyframes|-webkit-keyframes)\W/;

function tidyBlock(values, spaceAfterClosingBrace) {
  var withoutSpaceAfterClosingBrace;
  var withoutQuotes;
  var i;

  for (i = values.length - 1; i >= 0; i--) {
    withoutSpaceAfterClosingBrace = !spaceAfterClosingBrace && SUPPORTED_COMPACT_BLOCK_MATCHER.test(values[i][1]);
    withoutQuotes = SUPPORTED_QUOTE_REMOVAL_MATCHER.test(values[i][1]);

    values[i][1] = values[i][1]
      .replace(/\n|\r\n/g, ' ')
      .replace(/\s+/g, ' ')
      .replace(/(,|:|\() /g, '$1')
      .replace(/ \)/g, ')');

    if (withoutQuotes) {
      values[i][1] = values[i][1]
        .replace(/'([a-zA-Z][a-zA-Z\d\-_]+)'/, '$1')
        .replace(/"([a-zA-Z][a-zA-Z\d\-_]+)"/, '$1');
    }

    if (withoutSpaceAfterClosingBrace) {
      values[i][1] = values[i][1]
        .replace(/\) /g, ')');
    }
  }

  return values;
}

module.exports = tidyBlock;