sweet-data/lib/xml/index.js

plugin to pretty-print or minify XML, JSON, CSS and SQL files

var Promise = require('promise-polyfill');
var setAsap = require('setasap');
Promise._immediateFn = setAsap;

function xml(text) {
  var that = this;

  return new Promise(function(resolve, reject) {
    try {
      var ar = text.replace(/>\s{0,}</g,"><")
      .replace(/</g,"~::~<")
      .replace(/xmlns\:/g,"~::~xmlns:")
      .replace(/xmlns\=/g,"~::~xmlns=")
      .split('~::~'),
      len = ar.length,
      inComment = false,
      deep = 0,
      str = '',
      ix = 0;

      for(ix=0;ix<len;ix++) {
        // start comment or <![CDATA[...]]> or <!DOCTYPE //
        if(ar[ix].search(/<!/) > -1) {
          str += that.shift[deep]+ar[ix];
          inComment = true;
          // end comment  or <![CDATA[...]]> //
          if(ar[ix].search(/-->/) > -1 || ar[ix].search(/\]>/) > -1 || ar[ix].search(/!DOCTYPE/) > -1 ) {
            inComment = false;
          }
        } else
        // end comment  or <![CDATA[...]]> //
        if(ar[ix].search(/-->/) > -1 || ar[ix].search(/\]>/) > -1) {
          str += ar[ix];
          inComment = false;
        } else
        // <elm></elm> //
        if( /^<\w/.exec(ar[ix-1]) && /^<\/\w/.exec(ar[ix]) &&
          /^<[\w:\-\.\,]+/.exec(ar[ix-1]) == /^<\/[\w:\-\.\,]+/.exec(ar[ix])[0].replace('/','')) {
          str += ar[ix];
          if(!inComment) deep--;
        } else
          // <elm> //
        if(ar[ix].search(/<\w/) > -1 && ar[ix].search(/<\//) == -1 && ar[ix].search(/\/>/) == -1 ) {
          str = !inComment ? str += that.shift[deep++]+ar[ix] : str += ar[ix];
        } else
          // <elm>...</elm> //
        if(ar[ix].search(/<\w/) > -1 && ar[ix].search(/<\//) > -1) {
          str = !inComment ? str += that.shift[deep]+ar[ix] : str += ar[ix];
        } else
        // </elm> //
        if(ar[ix].search(/<\//) > -1) {
          str = !inComment ? str += that.shift[--deep]+ar[ix] : str += ar[ix];
        } else
        // <elm/> //
        if(ar[ix].search(/\/>/) > -1 ) {
          str = !inComment ? str += that.shift[deep]+ar[ix] : str += ar[ix];
        } else
        // <? xml ... ?> //
        if(ar[ix].search(/<\?/) > -1) {
          str += that.shift[deep]+ar[ix];
        } else
        // xmlns //
        if( ar[ix].search(/xmlns\:/) > -1  || ar[ix].search(/xmlns\=/) > -1) {
          str += that.shift[deep]+ar[ix];
        }

        else {
          str += ar[ix];
        }
      }

      resolve((str[0] == '\n') ? str.slice(1) : str);
    } catch (e) {
      reject(e);
    }
  });
}

function xmlmin(text, preserveComments) {

  return new Promise(function(resolve, reject) {
    try {
      var str = preserveComments ? text
            : text.replace(/\<![ \r\n\t]*(--([^\-]|[\r\n]|-[^\-])*--[ \r\n\t]*)\>/g,"");

      resolve(str.replace(/>\s{0,}</g,"><"));
    } catch (e) {
      reject(e);
    }
  });
}

exports.xml = xml;
exports.xmlmin = xmlmin;