Re: [xwiki-devs] Xwiki+Simile Exhibit integration // request for help w/ portability issue

9 May 2009

      On Wed, May 6, 2009 at 11:25 AM, Niels Mayer <[email protected]>
wrote<http://n2.nabble.com/Xwiki%2BSimile-Exhibit-integration----request-for-help-w--portability-issue-td2823091.html>
:
...
Here's my example of Xwiki/Exhibit integration:
http://nielsmayer.com/xwiki/bin/view/Exhibit/Presidents
I now have an improved version
http://nielsmayer.com/xwiki/bin/view/Exhibit/Presidents2

The main advantage of this version is that it should function "standalone"
without installing the Simile widgets locally. Unlike "Presidents" which
uses a local, modified copy of the Exhibit trunk, "Presidents2" loads from
api.simile-widgets.org .

*Attached, *the 35K Xar (Zip/Jar format) containing the standalone demo,
comprising three documents: Exhibit.Presidents2 and data-files
Exhibit.PresidentsSchemaJSON and Exhibit.PresidentsJSON. You should be able
to import these into your xwiki installation and get a working demo of
Exhibit. (note that since the javascript in Exhibit.Presidents2's object
XWiki.JavaScriptExtension[2] loads external javascript, the server and the
clients accessing must be connected to the network for this to work).

*Resolved*, one issue:
...
One last remaining hack is that I put the following in the headers
...
<link rel="exhibit/data" type="application/json"
href="$xwiki.getURL("Exhibit.PresidentsSchemaJSON","view","xpage=plain")" />
<link rel="exhibit/data" type="application/json"
href="$xwiki.getURL("Exhibit.PresidentsJSON","view","xpage=plain")" />
via the "Exhibit" space's "HTTP Meta Information" administration setting
...
This is replaced with some JavaScript residing in
XWiki.JavaScriptExtension[0]:

insertExhibitDataLink(window.document,
"/xwiki/bin/view/Exhibit/PresidentsSchemaJSON?xpage=plain");
insertExhibitDataLink(window.document,
"/xwiki/bin/view/Exhibit/PresidentsJSON?xpage=plain");

(Next version, Presidents3, will replace loading these two extra javascript
files and instead put the javascript data directly into
XWiki.JavaScriptExtension[0], replacing insertExhibitDataLink() calls.)

*Unresolved*, the IE portability issue, an Exhibit bug? Help??

In IE, after the simile busy-spinner has popped up indicating a successful
...
load of Exhibit, the following errors happen, causing three successive
dialog boxes:
(1) "Caught exception: ColorCoder: Error processing configuration of coder
Details: 'firstChild.nodeValue' is null or not an object
(2) Caught exception: undefined
Details: 'firstChild.nodeValue' is null or not an object
(3) IE error: Line 1831, char 52, Error: object expected
Note that this issue is independent of "trunk" versus "stable" versions of
Exhibit.
http://nielsmayer.com/xwiki/bin/view/Exhibit/Presidents uses a local copy of
"trunk"
http://nielsmayer.com/xwiki/bin/view/Exhibit/Presidents2 uses
api.simile-widgets.org
Both have the same problem with a null dereference from "
node.firstChild.nodeValue.trim()", which occurs in
api/scripts/ui/coders/color-coder.js functionExhibit.ColorCoder.createFromDOM():
...
try {
        var node = configElmt.firstChild;
        while (node != null) {
            if (node.nodeType == 1) {
                coder._addEntry(
                    Exhibit.getAttribute(node, "case"),
                    node.firstChild.nodeValue.trim(),
                    Exhibit.getAttribute(node, "color"));
            }
            node = node.nextSibling;
        }
    } catch (e) {
        SimileAjax.Debug.exception(e, "ColorCoder: Error processing
configuration of coder");
    }
Niels
http://nielsmayer.com