OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help

docbook-apps message

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]

Subject: Re: [docbook-apps] OPF file for EPUB is linking to images with different roles

Hi Glenn,
I looked at the epub/docbook.xsl stylesheet, and it does have a custom template for 
handling mediaobject.  Unfortunately, it does not run the selection routine to pick 
one of several imageobjects, so you get them all.

To see how it should be handled, look in xhtml/graphic.xsl, at the template starting 

    <xsl:template match="mediaobject|mediaobjectco">

you will see that the first steps are to call the template named 
'select.mediaobject.index', which should return one imageobject.  That's where the 
role attribute is used to select one of the imageobjects.

Out of the box, the supported values of role are 'html', 'xhtml', or 'fo', but you can 
easily add a new one like 'epub' by setting the 'preferred.mediaobject.role' 
stylesheet param.  See this reference for more information.


Bob Stayton
Sagehill Enterprises

----- Original Message ----- 
From: "Glenn McDonald" <gmcdonald@vividas.com>
To: <docbook-apps@lists.oasis-open.org>
Sent: Tuesday, July 13, 2010 10:59 PM
Subject: [docbook-apps] OPF file for EPUB is linking to images with different roles

>  For Docbook 4.x, I was able to use the following to force PDF's to use SVG and HTML 
> Books to use PNG's:
> <mediaobject>
> <imageobject role="fo">
> <imagedata fileref="screenshots/wizard_step_1.svg" scale="70"/>
> </imageobject>
> <imageobject role="html">
> <imagedata fileref="screenshots/wizard_step_1.png" scale="70"/>
> </imageobject>
> </mediaobject>
> This still works for PDF and HTML documents, however, I am finding that the epub 
> translation causes both of these images to be referenced in the OPF file:
> <manifest>
> ...
> <item id="d0e88" href="screenshots/wizard_step_1.svg" media-type="image/svg+xml"/>
> <item id="d0e94" href="screenshots/wizard_step_1.png" media-type="image/png"/>
> ...
> </manifest>
> The raw html output of the translated epub is (correctly) only referencing the .png 
> file
> <div class="mediaobject"><img src="screenshots/wizard_step_1.png" width="378" 
> alt="Step 1 Image Data"/>
> Incidentally, what "role" should an epub document be? role="epub" does not seem to 
> work. Is it "xhtml"?
> Glenn
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: docbook-apps-unsubscribe@lists.oasis-open.org
> For additional commands, e-mail: docbook-apps-help@lists.oasis-open.org

[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]