Re: [Xsltforms-support] getInstanceDocument

[COUTHURES A. <ala...@ag...>]

Hi Mark,
> I have just been experimenting with XSLTForms as distributed as part  
> of the latest eXist build. Can you tell me if there is any support, or  
> plan to support getInstanceDocument, or any alternative mechanism for  
> providing access to XForms instance documents and Javascript?
>   
Because of your question about getInstanceDocument support, I decided to 
have a closer look at W3C XForms Test #4.8.1.a which is non-normative :

<?xml version="1.0"  encoding="ISO-8859-1"?>
<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
    xmlns:ev="http://www.w3.org/2001/xml-events"
    xmlns:xforms="http://www.w3.org/2002/xforms">
    <xhtml:head>
        <xhtml:title>4.8.1.a getInstanceDocument() method 
(non-normative)</xhtml:title>
        <xhtml:link rel="stylesheet" 
href="../../../driverPages/forms/TestSuite11.css" type="text/css"/>
        <xforms:model id="my_model1">
            <xforms:instance id="my_data1">
                <car>
                    <color>blue</color>
                </car>
            </xforms:instance>
        </xforms:model>
    </xhtml:head>
    <xhtml:body>
        <xforms:group>
            <xforms:label class="title">4.8.1.a getInstanceDocument() 
method (non-normative)</xforms:label>
        </xforms:group>
        <xforms:group>
            <xforms:label>
                This test case uses Javascript to execute the 
getInstanceDocument() method.
                You may have seen a message box with the value 
&quot;blue&quot;.
            </xforms:label>
        </xforms:group>
        <xhtml:script type="text/javascript">
            var model = document.getElementById('my_model1');
            var inst1 = model.getInstanceDocument('my_data1');
            var my_color = inst1.getElementsByTagName('color')[0];
            alert(my_color.textContent);
        </xhtml:script>
    </xhtml:body>
</xhtml:html>

Yes, it was already possible to manipulate instances managed by 
XSLTForms directly with Javascript instructions but there were no 
well-known function for that. So, I added, in the very latest SVN 
version, the ones mentioned in this test (textContent attribute having 
to be replaced by getTextContent()). I had to postpone the specific 
Javascript calls so they are executed after the generated init() 
function which is called from body onload. This is the modified working 
test :

<?xml version="1.0"  encoding="ISO-8859-1"?>
<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
    xmlns:ev="http://www.w3.org/2001/xml-events"
    xmlns:xforms="http://www.w3.org/2002/xforms">
    <xhtml:head>
        <xhtml:title>4.8.1.a getInstanceDocument() method 
(non-normative)</xhtml:title>
        <xhtml:link rel="stylesheet" 
href="../../../driverPages/forms/TestSuite11.css" type="text/css"/>
        <xforms:model id="my_model1">
            <xforms:instance id="my_data1">
                <car>
                    <color>blue</color>
                </car>
            </xforms:instance>
        </xforms:model>
    </xhtml:head>
    <xhtml:body onload="f();">
        <xforms:group>
            <xforms:label class="title">4.8.1.a getInstanceDocument() 
method (non-normative)</xforms:label>
        </xforms:group>
        <xforms:group>
            <xforms:label>
                This test case uses Javascript to execute the 
getInstanceDocument() method.
                You may have seen a message box with the value 
&quot;blue&quot;.
            </xforms:label>
        </xforms:group>
        <xhtml:script type="text/javascript">
        function f() {
            var model = document.getElementById('my_model1');
            var inst1 = model.getInstanceDocument('my_data1');
            var my_color = inst1.getElementsByTagName('color')[0];
            alert(my_color.getTextContent());
            }
        </xhtml:script>
    </xhtml:body>
</xhtml:html>

This is, for sure, just the minimal set of methods required for this 
test but I needed less than two hours to add them... ;-)

 XSLTForms is easy to extend ! :-)

Best regards,

-Alain