[daisy] Saving Hook for a Part Editor

[Michael Hänni]

Hello

I have implemented a part editor for the Part Type "SvgData" of the 
document type "SVG document". This editor is an applet running inside a 
browser.
For the ease of use it should be possible for the user to click on the 
"Save" or "Cancle editing (clears lock)" buttons to save or discharge 
the edited part of the document. This is how it is done with the 
document type "Simple Document".
To meet this requirement I currently take the data from the applet and 
write it to a hidden field of the document. This hidden field then gets 
stored on the server side.

What could be a good presave hook for writing the changes of the applet 
in the "SVG document"?
Currently I'm doing this at the end of the function preSubmitChecks() of 
the file DaisyHome\daisywiki\webapp\daisy\resources\xml\documenteditor.xml.
This works fine, but is more a hack than a solution, as the code is 
executed for every document type, not just for a document containing a 
"SvgData" part.

Has anyone an idea?

Thanks


Here are some code fragments


this is the hidden field which gets saved by pressing the "save" button:
<ft:widget id="plaintext">
<fi:styling type="textarea" style="display:none"/>
</ft:widget>
(File: 
\DaisyHome\daisywiki\webapp\daisy\resources\form\parteditor_test_template.xml) 



here the document gets the edited data:

<script type="text/javascript">
function preSubmitChecks() {
  <jx:if test="${document.isNew()}">
  if (document.forms["editdoc"].name.value == "<i18n:text 
key="editdoc.new-document-name"/>") {
    return confirm("<i18n:text key="editdoc.name-warning"/>");
  }
  </jx:if>
  if (document.getElementById("plaintext:input") != 
null){                     //my code
    document.getElementById("plaintext:input").value = 
editorApplet.getData(); //my code
  
}                                                                            
//my code
  return true;
}
</script>
(File: DaisyHome\daisywiki\webapp\daisy\resources\xml\documenteditor.xml)