Re: [docbook-apps] Changing the html tag used for mediaobject videodata

[Joshua Wulf <jwulf@redhat.com>]

On 11/04/2011 11:01 AM, Joshua Wulf wrote:
> G'day, question about xsl.
> 
> Currently <videodata> inside a <mediaobject> renders to the html <embed>
> tag. I'd like to render it as <iframe> instead.
> 
> (<embed> works with Chrome, but doesn't work on Firefox 7 on Linux;
> <iframe> works with both)
> 
> For example:
> 
> <mediaobject>
>   <videoobject>
>     <videodata contentdepth="413" contentwidth="660"
> fileref="http://player.vimeo.com/video/30704252?title=0[1844952446]byline=0[1844952446]portrait=0"/>
>   </videoobject>
>   <caption/>
> </mediaobject>
> 
> currently renders:
> 
> <div class="mediaobject"><embed
> src="http://player.vimeo.com/video/30704252?title=0[1844952446]byline=0[1844952446]portrait=0";
> width="660" height="413"></embed><div class="caption"></div></div>
> 
> I want it to render as:
> 
> <div class="mediaobject"><iframe
> src="http://player.vimeo.com/video/30704252?title=0[1844952446]byline=0[1844952446]portrait=0";
> width="660" height="413"></iframe><div class="caption"></div></div>
> 

> Can anyone help out with the way to do this in the xsl? I've had a poke
> around in xhtml-common, and found this:
> 
> <xsl:template name="process.image">
>   <!-- When this template is called, the current node should be  -->
>   <!-- a graphic, inlinegraphic, imagedata, or videodata. All    -->
>   <!-- those elements have the same set of attributes, so we can -->
>   <!-- handle them all in one place.
> 
> In there I see:
>   <!-- imagedata, videodata, audiodata -->
>         <xsl:call-template name="mediaobject.filename">
>           <xsl:with-param name="object" select=".."/>
>         </xsl:call-template>
> 
> But I can't find a mediaobject.filename template anywhere, and I can't
> see where the <embed> tag is being specified.
> 
> Any help appreciated.
> 
> - Josh
> 
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I've found what I think is the xsl that applies this tag, in
graphics.xsl [1]:

<xsl:template match="videodata">
  <xsl:call-template name="process.image">
    <xsl:with-param name="tag" select="'embed'"/>
    <xsl:with-param name="alt">
      <xsl:apply-templates select="(../../textobject/phrase)[1]"/>
    </xsl:with-param>
  </xsl:call-template>
</xsl:template>

[1] http://docbook.sourceforge.net/release/xsl/1.76.1/xhtml/graphics.xsl

Is that the right place?

I'm trying to figure out how to override this in Publican [2], which is
the toolchain I'm using to build my Docbook. I've asked on the Publican
list how to override graphics.xsl. Hopefully that's the right piece of
xsl that I need to replace with my customization layer.

[2]
http://jfearn.fedorapeople.org/en-US/Publican/2.6/html-single/Users_Guide/index.html

- Josh