- From: Philip Fennell <Philip.Fennell@bbc.co.uk>
- Date: Thu, 20 Nov 2008 09:29:28 -0000
- To: <dev-tech-xforms@lists.mozilla.org>
- Cc: <www-forms@w3.org>
Aaron,
The reason I believe that there is a problem is that in section 9.3.7
The copy Element, the spec says:
The element node associated with the item, selected by the binding
attributes on copy, is deep copied as a child of the target node as if
an insert action had occurred.
It is possible to argue that because the observed behaviour is not
explicitly ruled-out in the definition of xf:copy I don't believe either
that it is possible to argue that the observed behaviour is acceptable.
I guess this would never have been an issue if the atom:category element
was the child of a atom:categories element.
Due to the lack of detail in the spec I'm gowing to throw this over to
the www-forms@w3.org list to see if anyone else has an opinion either
way on the subject.
Regards
Philip Fennell
>XML Developer (The Forge)
>
>BBC Future Media & Technology
>Media Village, 201 Wood Lane London W12 7TP
>BC4 C4, Broadcast Centre
>
>T: 0208 0085318
>
-----Original Message-----
From: dev-tech-xforms-bounces+philip.fennell=bbc.co.uk@lists.mozilla.org
[mailto:dev-tech-xforms-bounces+philip.fennell=bbc.co.uk@lists.mozilla.o
rg] On Behalf Of Aaron Reed
Sent: 19 November 2008 19:11
To: dev-tech-xforms@lists.mozilla.org
Subject: Re: Problems with xf:copy and xf:delete...
Hi Philip,
I believe that xf:copy is working correctly. Think of it like a normal
xf:select with items. When you bind a xf:select to a node and then
change the selected item, the value associated with that item replaces
the contents of the node that xf:select is bound to, right? In this
case, since it is a xf:select and not a xf:select1, you should be able
to select multiple items and they should all be able to exist under the
bound node together. If that isn't happening then THAT would be a bug.
--Aaron
Philip Fennell wrote:
> As a follow-up, I've noticed that the bind expression for 'entry.tags'
> might be causing the delete problems I was having. That expression
> points to an attribute node.
>
> I've re-jigged the form so that the [+] buttons are on one repeat for
> the 'available' categories and the [-] buttons are on another repeat
> for the 'selected' categories. Not exactly elegant but it'll do for
now.
>
>
> Regards
>
> Philip Fennell
>> XML Developer (The Forge)
>>
>> BBC Future Media & Technology
>> Media Village, 201 Wood Lane London W12 7TP
>> BC4 C4, Broadcast Centre
>>
>> T: 0208 0085318
>>
>
> -----Original Message-----
> From:
> dev-tech-xforms-bounces+philip.fennell=bbc.co.uk@lists.mozilla.org
> [mailto:dev-tech-xforms-bounces+philip.fennell=bbc.co.uk@lists.mozilla
> .o
> rg] On Behalf Of Philip Fennell
> Sent: 19 November 2008 13:35
> To: dev-tech-xforms@lists.mozilla.org
> Subject: Problems with xf:copy and xf:delete...
>
> Hello,
>
> I have been working on an XForms enable Atom Publishing Protocol (APP)
> client application for the publication of new Atom entries and I've
> run into a few problems with the XForms plug-in.
>
> I'm using:
>
> Firefox 3.0.4 and Mozilla XForms 0.8.6ff3 on Windows XP SP2
>
>
> And here are the problems:
>
> 1) I use xf:itemset and xf:copy, bound to the categories of the feed
> (see example below) to control the 'tags' the user can select for
> their entry via an xf:select. The xf:select is bound to the entry
> element of the entry instance data. When I select a tag from the list
> the correct category element is created but the side-effect is that
> all the other children of the entry (title, link, id, update and
> content) are deleted and the controls bound to them disappear from the
> view (not surprisingly). If you open the example XForm below you will
> be able to see the behaviour I've described. There is nothing that I
> can see in the XForms 1.1 spec that suggests this is the correct
> behaviour. Note, I tried the same form in FormsPlayer and it didn't
> delete the other children.
>
> 2) In order to get around this immediate problem I recreated, rather
> crudely, the same functionality (see example) by using xf:repeat, some
> xf:trigger elements and some xf:insert and xf:delete actions. This
> appears to work fine. But, if you comment-out the xf:select, refresh
> the browser, add a tag with the [+] button then delete it with the
> corresponding [-] Firefox crashes big-time!
>
>
> If anyone else can recreate these then please let me know and I'll
> raise some bugs in Bugzilla.
>
>
>
>
> Example XForm:
> ==============
>
> <?xml version="1.0" encoding="utf-8"?>
> <!-- <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> --> <html
> xmlns="http://www.w3.org/1999/xhtml"
> xmlns:app="http://www.w3.org/2007/app"
> xmlns:atom="http://www.w3.org/2005/Atom"
> xmlns:ev="http://www.w3.org/2001/xml-events"
> xmlns:xf="http://www.w3.org/2002/xforms"
> xmlns:xs="ttp://www.w3.org/2001/XMLSchema"
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xml:lang="en"
> lang="en">
> <head>
> <meta name="generator" content="jEdit" />
> <meta name="author" content="Philip A. R. Fennell" />
> <meta name="CVS-Id" content="$Id: $" />
> <!-- <link rel="stylesheet" type="text/css" href="" media="screen"
> /> -->
> <!-- <script type="text/javascript" src=""></script> -->
>
> <xf:model>
> <!--
> <xf:action ev:event="xforms-ready">
> <xf:send submission="getService"/>
> </xf:action>
> -->
>
> <!-- APP Service Document. -->
> <xf:submission id="getService"
> action="/app/service"
> method="get"
> replace="instance"
> instance="service">
> <xf:header>
> <xf:name>Accept</xf:name>
> <xf:value>application/atomsvc+xml</xf:value>
> </xf:header>
> <xf:action ev:event="xforms-submit-done">
> <xf:send submission="getCategories"/>
> </xf:action>
> </xf:submission>
>
> <xf:instance id="service" xmlns="http://www.w3.org/2007/app">
> <service xmlns="http://www.w3.org/2007/app"
> xmlns:atom="http://www.w3.org/2005/Atom">
> <workspace>
> <atom:title>Trees</atom:title>
> <collection href="/app/entries">
> <atom:title>Pictures</atom:title>
> <categories href="/app/tags"/>
> <accept>application/atom+xml</accept>
> </collection>
> </workspace>
> </service>
> </xf:instance>
>
> <xf:bind id="siteTitle"
> nodeset="instance('service')/app:workspace/atom:title"/>
> <xf:bind id="siteSubtitle"
>
nodeset="instance('service')/app:workspace/app:collection/atom:title"/>
> <xf:bind id="acceptsMediaTypes"
> nodeset="instance('service')/app:workspace/app:collection/app:accept"/
> >
>
>
>
>
> <!-- Atom Syndication Feed. -->
> <!-- <xf:submission id="getFeed"
> resource="../content/feed.atom"
> method="get"
> replace="instance"
> instance="service"/>
> <xf:instance id="feed" xmlns="http://www.w3.org/2005/Atom"/> -->
>
>
>
>
> <!-- Atom Feed Entry. -->
> <xf:submission id="createResource"
> method="post"
> replace="all"
> instance="entry"
> ref="instance('entry')">
> <xf:resource
> value="instance('service')/app:workspace/app:collection/@href"/>
> <xf:header>
> <xf:name>Slug</xf:name>
> <xf:value value="instance('entry')/atom:title"/>
> </xf:header>
> </xf:submission>
> <xf:instance id="entry">
> <entry xmlns="http://www.w3.org/2005/Atom">
> <title/>
> <link href=""/>
> <id/>
> <updated/>
> <content type="text"/>
> </entry>
> </xf:instance>
>
> <xf:bind id="entry.title"
nodeset="instance('entry')/atom:title"/>
> <xf:bind id="entry.content"
> nodeset="instance('entry')/atom:content"/>
> <xf:bind id="entry.categories" nodeset="instance('entry')"/>
> <xf:bind id="entry.tags"
> nodeset="instance('entry')/atom:category/@term"/>
>
>
>
> <!-- APP Categories Document. -->
> <xf:submission id="getCategories"
> method="get"
> replace="instance"
> instance="categories">
> <xf:header>
> <xf:name>Accept</xf:name>
> <xf:value>application/atomcat+xml</xf:value>
> </xf:header>
> <xf:resource
> value="instance('service')/app:workspace/app:collection/app:categories
> /@
> href"/>
> </xf:submission>
>
> <xf:instance id="categories" xmlns="http://www.w3.org/2007/app">
> <app:categories
> xmlns:app="http://www.w3.org/2007/app"
> xmlns:atom="http://www.w3.org/2005/Atom"
> fixed="yes"
> scheme="http://trees.co.uk/tags">
> <atom:category term="ash" />
> <atom:category term="beech" />
> <atom:category term="birch" />
> <atom:category term="chestnut" />
> <atom:category term="hazel" />
> <atom:category term="oak" />
> </app:categories>
> </xf:instance>
>
> <xf:bind id="tags"
> nodeset="instance('categories')/atom:category"/>
> </xf:model>
>
> <title>Atom Publishing Protocol Client</title>
> </head>
> <body>
> <h1>XForms Enabled <acronym title="Atom Publishing
> Protocol">APP</acronym> Client</h1>
> <div>
> <h2><xf:output bind="siteTitle"/> > Upload > <xf:output
> bind="siteSubtitle"/></h2>
> <xf:group>
>
> <xf:group>
> <xf:input bind="entry.title">
> <xf:label>Title</xf:label>
> </xf:input>
>
> <xf:group>
> <xf:textarea bind="entry.content">
> <xf:label>Content</xf:label>
> </xf:textarea>
> </xf:group>
> </xf:group>
>
> <xf:group>
> <xf:label>Tags</xf:label>
> <xf:repeat bind="entry.tags">
> <xf:output ref="."/>
> </xf:repeat>
> </xf:group>
>
> <xf:group>
> <xf:select bind="entry.categories" appearance="full">
> <xf:label>Select</xf:label>
> <xf:itemset bind="tags">
> <xf:label ref="@term"/>
> <xf:copy ref="."/>
> </xf:itemset>
> </xf:select>
> </xf:group>
>
> <xf:group>
> <ul>
> <xf:repeat id="selector.tags" bind="tags">
> <li>
> <xf:trigger>
> <xf:label>+</xf:label>
> <xf:action ev:event="DOMActivate">
> <xf:insert context="instance('entry')"
> nodeset="atom:category"
>
origin="instance('categories')/atom:category[index('selector.tags')]"/>
> </xf:action>
> </xf:trigger>
> <xf:trigger>
> <xf:label>-</xf:label>
> <xf:action ev:event="DOMActivate">
> <xf:delete context="instance('entry')"
> nodeset="atom:category" at="index('selector.tags')"/>
> </xf:action>
> </xf:trigger>
> <xf:output ref="@term"/>
> </li>
> </xf:repeat>
> </ul>
> </xf:group>
>
> <!--<xf:group>
> <xf:submit submission="createResource">
> <xf:label>Publish</xf:label>
> <xf:hint>Publish you new entry</xf:hint>
> </xf:submit>
> </xf:group>-->
> </xf:group>
>
> </div>
> </body>
> </html>
>
>
>
>
>
> Regards
>
> Philip Fennell
>> XML Developer (The Forge)
>>
>> BBC Future Media & Technology
>> Media Village, 201 Wood Lane London W12 7TP
>> BC4 C4, Broadcast Centre
>>
>> T: 0208 0085318
>>
>
> http://www.bbc.co.uk/
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Received on Thursday, 20 November 2008 09:30:13 UTC