XML pretty-print: Several pretty-print runs create additional newlines in each run

[henningit]

It's due to the namespace attribute: if a XML file contains a namespace attribute then each iteration of a pretty-print run adds a newline \n to the result file. I've adjusted the pretty-data/test/test_xml.js to show the issue:

var xml = '<?xml version="1.0" encoding="UTF-8" ?>      <!DOCTYPE foo SYSTEM "Foo.dtd"><a>          <b>bbb</b>   <!-- comment --><c/><d><soapenv:Envelope xmlns:soapenv="http://xxx" xmlns:xsd="http://yyy" xmlns:xsi="http://zzz"></soapenv>       </d><e>        <![CDATA[ <z></z> ]]></e><f><g></g></f></a>';
var pp_xml  = require('../pretty-data').pd.xml(xml);
var pp2_xml  = require('../pretty-data').pd.xml(pp_xml);
var pp3_xml  = require('../pretty-data').pd.xml(pp2_xml);

console.log('\n==============================================================================\n');
console.log('\n/*------- Original XML string: -------*/\n\n' + xml + '\n');
console.log('\n/*------- Beautified XML -------------*/\n\n' + pp_xml  + '\n');
console.log('\n/*------- Beautified twice XML -------------*/\n\n' + pp2_xml  + '\n');
console.log('\n/*------- Beautified 3 times XML -------------*/\n\n' + pp3_xml  + '\n');
console.log('\n===============================================================================\n');

Result:

/*------- Beautified XML -------------*/

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE foo SYSTEM "Foo.dtd">
<a>
  <b>bbb</b>
  <!-- comment -->
  <c/>
  <d>
    <soapenv:Envelope
      xmlns:soapenv="http://xxx"
      xmlns:xsd="http://yyy"
      xmlns:xsi="http://zzz">
    </soapenv>
  </d>
  <e>
    <![CDATA[ <z></z> ]]>
  </e>
  <f>
    <g></g>
  </f>
</a>


/*------- Beautified twice XML -------------*/

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE foo SYSTEM "Foo.dtd">
<a>
  <b>bbb</b>
  <!-- comment -->
  <c/>
  <d>
    <soapenv:Envelope

      xmlns:soapenv="http://xxx"

      xmlns:xsd="http://yyy"

      xmlns:xsi="http://zzz">
    </soapenv>
  </d>
  <e>
    <![CDATA[ <z></z> ]]>
  </e>
  <f>
    <g></g>
  </f>
</a>


/*------- Beautified 3 times XML -------------*/

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE foo SYSTEM "Foo.dtd">
<a>
  <b>bbb</b>
  <!-- comment -->
  <c/>
  <d>
    <soapenv:Envelope


      xmlns:soapenv="http://xxx"


      xmlns:xsd="http://yyy"


      xmlns:xsi="http://zzz">
    </soapenv>
  </d>
  <e>
    <![CDATA[ <z></z> ]]>
  </e>
  <f>
    <g></g>
  </f>
</a>

I expect that the 2nd and 3rd application of the pretty-print to this XML does not change the XML anymore. One application should be sufficient.

I've found this issue in version 0.40.0.

[xclayl]

I found a similar issue. This sample below keeps growing. I guess the mixing text and tags is causing it.

        <target state="new">Company Details
          
          
          <x id="START_TAG_SPAN" ctype="x-span" equiv-text="&lt;span>"/>
          <x id="START_TAG_BUTTON" ctype="x-button" equiv-text="&lt;button>"/>×
          
          
          <x id="CLOSE_TAG_BUTTON" ctype="x-button" equiv-text="&lt;/button>"/>
          <x id="CLOSE_TAG_SPAN" ctype="x-span" equiv-text="&lt;/span>"/>
        </target>

[duncdrum]

first minifying and then prettifying also doesn't solve the problem see #9