JS格式化XML

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JS格式化XML

格式化XML

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String.prototype.removeLineEnd = function () {
  return this.replace(/(<.+?\s+?)(?:\n\s*?(.+?=".*?"))/g, '$1 $2')
}

function getPrefix(prefixIndex) {
  var span = '    ';
  var output = [];
  for (var i = 0; i < prefixIndex; ++i) {
    output.push(span);
  }

  return output.join('');
}

var format_xml_fun = function (text) {
  //去掉多余的空格
  text = '\n' + text.replace(/(<\w+)(\s.*?>)/g, function ($0, name, props) {
    return name + ' ' + props.replace(/\s+(\w+=)/g, " $1");
  }).replace(/>\s*?</g, ">\n<");

  //把注释编码
  text = text.replace(/\n/g, '\r').replace(/<!--(.+?)-->/g, function ($0, text) {
    return '<!--' + escape(text) + '-->';
  }).replace(/\r/g, '\n');

  //调整格式
  var rgx = /\n(<(([^?]).+?)(?:\s|\s*?>|\s*?(\/)>)(?:.*?(?:(?:(\/)>)|(?:<(\/)\2>)))?)/mg;
  var nodeStack = [];
  var output = text.replace(rgx, function ($0, all, name, isBegin, isCloseFull1, isCloseFull2, isFull1, isFull2) {
    var isClosed = (isCloseFull1 === '/') || (isCloseFull2 === '/') || (isFull1 === '/') || (isFull2 === '/');
    var prefix = '';
    if (isBegin === '!') {
      prefix = getPrefix(nodeStack.length);
    } else {
      if (isBegin !== '/') {
        prefix = getPrefix(nodeStack.length);
        if (!isClosed) {
          nodeStack.push(name);
        }
      } else {
        nodeStack.pop();
        prefix = getPrefix(nodeStack.length);
      }

    }
    return '\n' + prefix + all;
  });

  var prefixSpace = -1;
  var outputText = output.substring(1);

  //把注释还原并解码，调格式
  outputText = outputText.replace(/\n/g, '\r').replace(/(\s*)<!--(.+?)-->/g, function ($0, prefix, text) {
    if (prefix.charAt(0) === '\r')
      prefix = prefix.substring(1);
    text = unescape(text).replace(/\r/g, '\n');
    return '\n' + prefix + '<!--' + text.replace(/^\s*/mg, prefix) + '-->';
  });

  return outputText.replace(/\s+$/g, '').replace(/\r/g, '\r\n');
}

export const format_xml = format_xml_fun