Dynamically added attributes do not get their namespace saved

[GoogleCodeExporter]

What steps will reproduce the problem?

1. Whitelist your custom element/attribute combination in sanitize.js
2. Add an attribute to an element via a plugin, e.g. 

    element.setAttributeNS('http://www.w3.org/1999/xlink', 'href', value);

3. Save the image.

What is the expected output? 

<rect xlink:href="somelink"/>

What do you see instead?

<rect href="somelink"/>

In what browser did you experience this problem? (ALL, Firefox, Opera, etc)

Firefox 11.0, Chrome 17.0

In what version of SVG-edit does the problem occur? (Latest trunk, 2.5.1,
etc)

Latest trunk (r2077)

Please provide any additional information below.

The following patch fixes the problem, at least for me:

--- editor/svgcanvas.js (revision 2078)
+++ editor/svgcanvas.js (working copy)
@@ -5228,7 +5228,11 @@
                    // map various namespaces to our fixed namespace prefixes
                    // (the default xmlns attribute itself does not get a prefix)
                    if(!attr.namespaceURI || attr.namespaceURI == svgns || nsMap[attr.namespaceURI]) {
-                       out.push(attr.nodeName); out.push("=\"");
+                       if (nsMap[attr.namespaceURI]) {
+                           out.push (nsMap[attr.namespaceURI]);
+                           out.push (':');
+                       }
+                       out.push(attr.localName); out.push("=\"");
                        out.push(attrVal); out.push("\"");
                    }
                }

Original issue reported on code.google.com by mor...@wissenba.ch on 5 Apr 2012 at 1:27