<?xml version="1.0" encoding="utf-8"?>
<!--
Image handling. Includes support for normal and "zoomed" images in HTML.
TODO: Ideally, I think we should be able to define two image formats (PDF, EPS, PNG, ...) when marking up an image: one for LaTeX output, another for HTML. Mind you, if the generation of the various formats from a single master is handled outside of the XSLT processing...?
-->
<stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<!--
LaTeX images are always handled the same way regardless. Image scaling factor is supported.
TODO: alternatively, allow defining the scaling factor by specifying what proportion of the page width the image should occupy (a la LaTeX [width] parameter).
How about a <latex-attributes> element that can be used to specify \includegraphics arguments?
<width keepaspectratio="yes">0.5\columnwidth</width>
<height>2cm</height>
<scale>0.5</scale>
etc.
-->
<template name="latex-image" match="image" mode="latex">
<common formats="/latex/xelatex/">
<xsl:text>\includegraphics</xsl:text>
<!--
General-purpose latex pass-through arguments for \includegraphics. If providing multiple arguments, these should be comma-separated in the source XML, but do not need the enclosing square brackets.
-->
<xsl:if test="@latex-options">
<xsl:text>[</xsl:text>
<xsl:value-of select="@latex-options" />
<xsl:text>]</xsl:text>
</xsl:if>
<xsl:text>{</xsl:text>
<!--
Work out the full path specification for the file to be included = base-path + location (if specified) + basename.
-->
<xsl:value-of select="$base-path" />
<xsl:text>/</xsl:text>
<!-- Check whether the location attribute is included. -->
<xsl:if test="@location">
<xsl:value-of select="@location" />
<xsl:text>/</xsl:text>
</xsl:if>
<xsl:if test="@basename">
<xsl:value-of select="@basename" />
</xsl:if>
<xsl:text>-print.</xsl:text>
<!-- Figure out the image format. -->
<xsl:choose>
<xsl:when test="@format">
<xsl:value-of select="@format" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$image-format" />
</xsl:otherwise>
</xsl:choose>
<xsl:text>}</xsl:text>
</common>
</template>
<!--
"Standard" scale image. For LaTeX, we simply pass off to the "latex-image" template above.
TODO: if no description is given, use the basename as the content of the ALT element.
TODO: can we refactor some of this into a function or something?
-->
<template name="normal-image" match="image[count(provide-large-version) = 0]">
<common>
<!--
Check for obsolete child elements. We need to do this explicitly, as there isn't an apply-templates inside this template to pick them up automatically.
-->
<xsl:apply-templates select="basename|format|latex-scaling" />
</common>
<common formats="/latex/xelatex/"><xsl:apply-templates select="." mode="latex" /></common>
<common formats="/html/xhtml/">
<img class="padded" style="border-style: none;">
<xsl:attribute name="src">
<!--
Work out the full path specification for the file to be included = base-path + location (if specified) + basename.
-->
<xsl:value-of select="$base-path" />
<xsl:text>/</xsl:text>
<!-- Check whether the location attribute is included. -->
<xsl:if test="@location">
<xsl:value-of select="@location" />
<xsl:text>/</xsl:text>
</xsl:if>
<xsl:value-of select="basename|@basename" />
<xsl:text>-web.</xsl:text>
<xsl:choose>
<!-- CME: oops, I'd originally used the "format" tag to identify the format used in the LaTeX version, not the HTML! -->
<xsl:when test="@format">
<xsl:value-of select="@format" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$image-format" />
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:attribute name="alt"><xsl:apply-templates select="description" /></xsl:attribute>
</img>
</common>
</template>
<!--
"Zoomed" image. For LaTeX, we simply pass off to the "latex-image" template above.
TODO: if no description is given, use the basename as the content of the ALT element.
TODO: can we refactor some of this into a function or something?
-->
<template name="zoomable-image" match="image[count(provide-large-version) != 0]">
<common>
<!--
Check for obsolete child elements. We need to do this explicitly, as there isn't an apply-templates inside this template to pick them up automatically.
-->
<xsl:apply-templates select="basename|format|latex-scaling" />
</common>
<common formats="/latex/xelatex/"><xsl:apply-templates select="." mode="latex" /></common>
<common formats="/html/xhtml/">
<a>
<xsl:attribute name="href">
<!--
Work out the full path specification for the file to be included = base-path + location (if specified) + basename.
-->
<xsl:value-of select="$base-path" />
<xsl:text>/</xsl:text>
<!-- Check whether the location attribute is included. -->
<xsl:if test="@location">
<xsl:value-of select="@location" />
<xsl:text>/</xsl:text>
</xsl:if>
<xsl:value-of select="basename|@basename" />
<xsl:text>-web-zoom.</xsl:text>
<xsl:choose>
<!-- CME: oops, I'd originally used the "format" tag to identify the format used in the LaTeX version, not the HTML! -->
<xsl:when test="@format">
<xsl:value-of select="@format" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$image-format" />
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<img class="padded" style="border-style: none;">
<xsl:attribute name="src">
<!--
Work out the full path specification for the file to be included = base-path + location (if specified) + basename.
-->
<xsl:value-of select="$base-path" />
<xsl:text>/</xsl:text>
<!-- Check whether the location attribute is included. -->
<xsl:if test="@location">
<xsl:value-of select="@location" />
<xsl:text>/</xsl:text>
</xsl:if>
<xsl:value-of select="basename|@basename" />
<xsl:text>-web.</xsl:text>
<xsl:choose>
<!-- CME: oops, I'd originally used the "format" tag to identify the format used in the LaTeX version, not the HTML! -->
<xsl:when test="@format">
<xsl:value-of select="@format" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$image-format" />
</xsl:otherwise>
</xsl:choose>
</xsl:attribute>
<xsl:attribute name="alt">
<xsl:apply-templates select="description" />
</xsl:attribute>
</img>
<br clear="right" />
<xsl:text>(Larger version)</xsl:text>
</a>
</common>
</template>
</stylesheet>
