Re: Patch III - I hope the last

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Hello,

>
> I added a support for the scalefit and align=3D"center" attribute of
> graphic of DocBook. The scalefit attribute crates a resizebox which
> makes the graphic to the size of the column (\columnwidth). maybe this
> should overwritten, in a costum style sheet.
> If the width and the height are specified, a bb=3D attibut is appended =
to
> the \includegraphics command. this is important for rendering png image=
s
> with LaTeX.
> The scalefit and the width attribut is abused, actuallay the semantic o=
f
> this paramters is different, but it works mostly in a way a user would
> expect. The height parameter does not exist in DocBook and the
> validation should fail ... There should be a better solution.

I would suggest to use directly the \includegraphics options. Example:

\includegraphics[scale=3D0.5,width=3D5cm,height=3D10cm,keepaspectratio=3D=
true]

Please find attached the stylesheet I use to render <imagedata>. Most of =
=20
the imagadata attributes combinations are supported. Any comment is =20
welcome.

Regards,

BG

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Content-Disposition: attachment; filename=mediaobject.xsl
Content-Type: application/octet-stream; name=mediaobject.xsl
Content-Transfer-Encoding: quoted-printable

<?xml version=3D'1.0'?>
<xsl:stylesheet xmlns:xsl=3D"http://www.w3.org/1999/XSL/Transform" versio=
n=3D'1.0'>

<!--#####################################################################=
#######
    XSLT Stylesheet DocBook -> LaTeX=20
    #####################################################################=
####### -->


<xsl:template match=3D"videoobject">
  <xsl:apply-templates select=3D"videodata"/>
</xsl:template>

<xsl:template match=3D"audioobject">
  <xsl:apply-templates select=3D"audiodata"/>
</xsl:template>

<xsl:template match=3D"textobject">
  <xsl:apply-templates/>
</xsl:template>

<xsl:template match=3D"mediaobject|inlinemediaobject">
<!--
  within a figure don't put each mediaobject into a separate paragraph,=20
  to let the subfigures correctly displayed.
  -->
  <xsl:if test=3D"self::mediaobject and not(parent::figure)">
    <xsl:text>&#10;</xsl:text>
  </xsl:if>
  <xsl:choose>
    <xsl:when test=3D"imageobject">
      <xsl:apply-templates select=3D"imageobject[1]"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:apply-templates select=3D"textobject[1]"/>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:if test=3D"self::mediaobject and not(parent::figure)">
    <xsl:text>&#10;</xsl:text>
  </xsl:if>
</xsl:template>

<xsl:template match=3D"imageobject">
  <xsl:variable name=3D"figcount"
                select=3D"count(ancestor::figure/mediaobject[imageobject]=
)"/>
  <xsl:if test=3D"$figcount &gt; 1">
    <!-- space before subfigure to prevent from strange behaviour with ot=
her
         subfigures -->
    <xsl:text> \subfigure[</xsl:text>
    <xsl:value-of select=3D"../caption"/>
    <xsl:text>]{</xsl:text>
  </xsl:if>
  <xsl:if test=3D"$latex.figure.boxed =3D '1'">
    <xsl:text>\fbox{</xsl:text>
  </xsl:if>
  <xsl:apply-templates select=3D"imagedata"/>
  <xsl:if test=3D"$latex.figure.boxed =3D '1'">
    <xsl:text>}</xsl:text>
  </xsl:if>
  <xsl:if test=3D"$figcount &gt; 1">
    <xsl:text>}</xsl:text>
  </xsl:if>
</xsl:template>

<xsl:template name=3D"unit.eval">
  <xsl:param name=3D"length"/>
  <xsl:param name=3D"prop" select=3D"''"/>
  <xsl:choose>
  <!-- percentage of something -->
  <xsl:when test=3D"contains($length, '%') and substring-after($length, '=
%')=3D''">
    <xsl:value-of select=3D"number(substring-before($length, '%')) div 10=
0"/>
    <xsl:value-of select=3D"$prop"/>
  </xsl:when>
  <!-- pixel unit is not handled -->
  <xsl:when test=3D"contains($length, 'px') and substring-after($length, =
'px')=3D''">
    <xsl:message>Pixel unit not handled (replaced by pt)</xsl:message>
    <xsl:value-of select=3D"number(substring-before($length, 'px'))"/>
    <xsl:text>pt</xsl:text>
  </xsl:when>
  <!-- no unit provided means pixel -->
  <xsl:when test=3D"$length and (number($length)=3D$length)">
    <xsl:message>Pixel unit not handled (replaced by pt)</xsl:message>
    <xsl:value-of select=3D"$length"/>
    <xsl:text>pt</xsl:text>
  </xsl:when>
  <!-- hope the unit is handled -->
  <xsl:otherwise>
    <xsl:value-of select=3D"$length"/>
  </xsl:otherwise>
  </xsl:choose>
</xsl:template>

<xsl:template match=3D"imagedata" name=3D"imagedata">
  <xsl:variable name=3D"filename">
    <xsl:choose>
    <xsl:when test=3D"@fileref">
      <xsl:value-of select=3D"@fileref"/>
    </xsl:when>
    <xsl:when test=3D"@entityref">
      <xsl:value-of select=3D"unparsed-entity-uri(@entityref)"/>
    </xsl:when>
    </xsl:choose>
  </xsl:variable>
  <xsl:variable name=3D"width">
    <xsl:call-template name=3D"unit.eval">
      <xsl:with-param name=3D"length" select=3D"@width"/>
      <xsl:with-param name=3D"prop" select=3D"'\linewidth'"/>
    </xsl:call-template>
  </xsl:variable>
  <xsl:variable name=3D"depth">
    <xsl:call-template name=3D"unit.eval">
      <xsl:with-param name=3D"length" select=3D"@depth"/>
      <xsl:with-param name=3D"prop" select=3D"'\textheight'"/>
    </xsl:call-template>
  </xsl:variable>
  <!-- viewport is valid only if there's some viewport spec, and content =
or scale.
       TDG says that viewport spec without content/scale and scalefit=3D0=
 is ignored. -->
  <xsl:variable name=3D"viewport">
    <xsl:choose>
    <xsl:when test=3D"(@width or @depth) and (@contentwidth or @contentde=
pth or @scale)">
      <xsl:value-of select=3D"1"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select=3D"0"/>
    </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:text>{</xsl:text>
  <xsl:if test=3D"$viewport=3D1">
    <xsl:text>\begin{minipage}[c]</xsl:text>
    <xsl:if test=3D"@depth">
      <!-- depth -->
      <xsl:text>[</xsl:text>
      <xsl:value-of select=3D"$depth"/>
      <xsl:text>]</xsl:text>
      <xsl:text>[</xsl:text>
      <!-- vertical alignment (meaningfull only with depth) -->
      <xsl:choose>
      <xsl:when test=3D"@valign=3D'bottom'">
        <xsl:text>b</xsl:text>
      </xsl:when>
      <xsl:when test=3D"@valign=3D'middle'">
        <xsl:text>c</xsl:text>
      </xsl:when>
      <xsl:when test=3D"@valign=3D'top'">
        <xsl:text>t</xsl:text>
      </xsl:when>
      <xsl:otherwise>
        <xsl:text>c</xsl:text>
      </xsl:otherwise>
      </xsl:choose>
      <xsl:text>]</xsl:text>
    </xsl:if>
    <!-- width -->
    <xsl:text>{</xsl:text>
    <xsl:choose>
    <xsl:when test=3D"@width">
      <xsl:value-of select=3D"$width"/>
    </xsl:when>
    <xsl:when test=3D"ancestor::mediaobject">
      <xsl:text>\linewidth</xsl:text>
    </xsl:when>
    <!-- TODO: inline viewport area should be as wide as the graphic -->
    <!--  <xsl:text>\figwidth</xsl:text> -->
    <xsl:otherwise>
      <xsl:text>\linewidth</xsl:text>
    </xsl:otherwise>
    </xsl:choose>
    <xsl:text>}&#10;</xsl:text>
  </xsl:if>
  <!-- horizontal alignment -->
  <xsl:choose>
  <xsl:when test=3D"@align=3D'center'">
    <xsl:text>\centering </xsl:text>
  </xsl:when>
  <xsl:when test=3D"@align=3D'left'">
    <xsl:text>\raggedright </xsl:text>
  </xsl:when>
  <xsl:when test=3D"@align=3D'right'">
    <xsl:text>\raggedleft </xsl:text>
  </xsl:when>
  </xsl:choose>
  <xsl:text>{\includegraphics[</xsl:text>
  <!-- TDG says that content, scale and scalefit are mutually exclusive -=
->
  <xsl:choose>
    <!-- content area spec -->
    <xsl:when test=3D"@contentwidth or @contentdepth">=20
      <xsl:choose>
      <xsl:when test=3D"contains(@contentwidth, '%') and
                      substring-after(@contentwidth, '%')=3D''">
        <xsl:text>scale=3D</xsl:text>
        <xsl:value-of select=3D"number(substring-before(@contentwidth, '%=
')) div 100"/>
      </xsl:when>
      <xsl:when test=3D"contains(@contentdepth, '%') and
                      substring-after(@contentdepth, '%')=3D''">
        <xsl:text>scale=3D</xsl:text>
        <xsl:value-of select=3D"number(substring-before(@contentdepth, '%=
')) div 100"/>
      </xsl:when>
      <xsl:otherwise>
        <xsl:if test=3D"@contentwidth">
          <xsl:text>width=3D</xsl:text>
          <xsl:call-template name=3D"unit.eval">
            <xsl:with-param name=3D"length" select=3D"@contentwidth"/>
          </xsl:call-template>
          <xsl:text>,</xsl:text>
        </xsl:if>
        <xsl:if test=3D"@contentdepth">
          <xsl:text>height=3D</xsl:text>
          <xsl:call-template name=3D"unit.eval">
            <xsl:with-param name=3D"length" select=3D"@contentdepth"/>
          </xsl:call-template>
        </xsl:if>
      </xsl:otherwise>
      </xsl:choose>
    </xsl:when>
    <!-- scaling -->
    <xsl:when test=3D"@scale">=20
      <xsl:text>scale=3D</xsl:text>
      <xsl:value-of select=3D"number(@scale) div 100"/>
    </xsl:when>
    <!-- only viewport area spec with scalefit -->
    <xsl:when test=3D"not(@scalefit) or @scalefit=3D'1'">
      <xsl:if test=3D"@width">
        <xsl:text>width=3D</xsl:text>
        <xsl:value-of select=3D"$width"/>
        <xsl:text>,</xsl:text>
      </xsl:if>
      <xsl:if test=3D"@depth">
        <xsl:text>height=3D</xsl:text>
        <xsl:value-of select=3D"$depth"/>
        <xsl:text>,</xsl:text>
      </xsl:if>
      <!-- TDG says that scale to fit cannot be anamorphic -->
      <xsl:text>keepaspectratio=3Dtrue</xsl:text>
    </xsl:when>
  </xsl:choose>
  <xsl:if test=3D"@format =3D 'PRN'">
    <xsl:text>,angle=3D270</xsl:text>
  </xsl:if>
  <xsl:text>]{</xsl:text>
  <xsl:value-of select=3D"$filename"/>
  <xsl:text>}}\quad&#10;</xsl:text>
  <xsl:if test=3D"$viewport=3D1">
    <xsl:text>\end{minipage}&#10;</xsl:text>
  </xsl:if>
  <xsl:text>}&#10;</xsl:text>
</xsl:template>


</xsl:stylesheet>


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