Re: [docbook-apps] About client-side imagemap generation

["Bob Stayton" <bobs@sagehill.net>]

version 1.69.1 does implement image maps, with limitations.  The main 
limitations are that you must use units="calspair" and you must not scale 
the image using the scaling attributes.  The code that implements it in the 
stylesheet is in html/graphics.xsl, in the big template named 
'process.image', starting with this:

  <xsl:if test="$tag = 'img' and ../../self::imageobjectco and 
not($scaled)">
    <map name="{generate-id(../..)}">
      <xsl:for-each select="../../areaspec//area">

I've not used it myself so I can't speak to how well it works.

Bob Stayton
Sagehill Enterprises
DocBook Consulting
bobs@sagehill.net


----- Original Message ----- 
From: "Tomas HAJEK" <tomas.hajek@st.com>
To: "Costin Stroie" <cstroie@bitdefender.com>
Cc: <docbook-apps@lists.oasis-open.org>
Sent: Tuesday, April 25, 2006 2:35 AM
Subject: Re: [docbook-apps] About client-side imagemap generation


> Costin Stroie wrote:
>
>> First, let me say I've been waiting for long for this feature and I was 
>> very happy when I found it was implemented. I must thank to all of you 
>> for it.
>
> Which set of stylesheets implements this feature? Those standard 
> docbook-xsl ones? Latest release is 1.69.1 and I cannot find this 
> functionality there.
>
> regards,
>
>       Tomas
>
>>
>> But more problems came out.
>>
>> 1. I have not trully understood why calspair coordinates should express 
>> percentages. But I am ready to accept it.
>>
>> 2. When generating htmls, as Bob said, there is no need for the images 
>> to be present. They must be present when the resulted html is to be 
>> loaded in some browser. But for creating the imagemap with the current 
>> xsl stylesheets, the image size must be known in order to compute the 
>> percentual values of the coordinates. Now we have 2 options: use only 
>> nominal image sizes or use some processor that supports extensions and 
>> can get those sizes. Is xsltproc supported?
>>
>> The question is where is the portability since you are forced to have 
>> the images present and in the final location and to use the Java based 
>> xalan or saxon processors.
>>
>> Why not, at least, let us manually specify the sizes. If you specify 
>> them, you will get the "Warning: imagemaps not supported on scaled 
>> images".
>>
>
> -- 
> _______________________________________________________________________
>                                                            Tomas Hajek 
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