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Merge pull request #248 from oreillymedia/TOOLSDEV-387-epub-accessbility
Add handling for required epub accessibility metadata in OPF template
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‎htmlbook-xsl/opf.xsl

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@@ -91,6 +91,100 @@
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</xsl:choose>
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</xsl:template>
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<!-- Generic template for handling accessibility properties -->
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<xsl:template name="get.accessibility.property.xml">
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<xsl:param name="terms.to.process" select="''"/>
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<xsl:param name="property.type" select="'term'"/> <!-- 'term', 'feature', or 'hazard' -->
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<xsl:param name="first.call" select="1"/>
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<xsl:choose>
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<xsl:when test="$first.call = 1">
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<xsl:variable name="wrapper.element">
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<xsl:choose>
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<xsl:when test="$property.type = 'term'">e:accessibility-terms</xsl:when>
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<xsl:when test="$property.type = 'feature'">e:accessibility-features</xsl:when>
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<xsl:when test="$property.type = 'hazard'">e:accessibility-hazards</xsl:when>
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</xsl:choose>
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</xsl:variable>
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<xsl:element name="{$wrapper.element}">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="$terms.to.process"/>
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<xsl:with-param name="property.type" select="$property.type"/>
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<xsl:with-param name="first.call" select="0"/>
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</xsl:call-template>
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</xsl:element>
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</xsl:when>
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<xsl:otherwise>
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<xsl:choose>
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<xsl:when test="normalize-space(substring-before($terms.to.process, '&#x0A;')) != ''">
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<xsl:variable name="term">
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<xsl:value-of select="normalize-space(substring-before($terms.to.process, '&#x0A;'))"/>
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</xsl:variable>
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<xsl:variable name="element.name">
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<xsl:choose>
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<xsl:when test="$property.type = 'term'">e:term</xsl:when>
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<xsl:when test="$property.type = 'feature'">e:feature</xsl:when>
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<xsl:when test="$property.type = 'hazard'">e:hazard</xsl:when>
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</xsl:choose>
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</xsl:variable>
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<xsl:element name="{$element.name}"><xsl:value-of select="$term"/></xsl:element>
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<xsl:if test="normalize-space(substring-after($terms.to.process, '&#x0A;')) != ''">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="substring-after($terms.to.process, '&#x0A;')"/>
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<xsl:with-param name="property.type" select="$property.type"/>
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<xsl:with-param name="first.call" select="0"/>
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</xsl:call-template>
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</xsl:if>
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</xsl:when>
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<xsl:when test="normalize-space($terms.to.process) != ''">
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<xsl:variable name="term">
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<xsl:value-of select="normalize-space($terms.to.process)"/>
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</xsl:variable>
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<xsl:variable name="element.name">
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<xsl:choose>
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<xsl:when test="$property.type = 'term'">e:term</xsl:when>
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<xsl:when test="$property.type = 'feature'">e:feature</xsl:when>
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<xsl:when test="$property.type = 'hazard'">e:hazard</xsl:when>
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</xsl:choose>
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</xsl:variable>
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<xsl:element name="{$element.name}"><xsl:value-of select="$term"/></xsl:element>
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</xsl:when>
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</xsl:choose>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- Parameter for accessibility modes -->
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<xsl:variable name="accessibility.modes.list.xml">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="$access.mode"/>
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<xsl:with-param name="property.type" select="'term'"/>
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</xsl:call-template>
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</xsl:variable>
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<!-- Parameter for accessibility mode sufficient -->
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<xsl:variable name="accessibility.mode.sufficient.list.xml">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="$access.mode.sufficient"/>
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<xsl:with-param name="property.type" select="'term'"/>
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</xsl:call-template>
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</xsl:variable>
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<!-- Parameter for accessibility features -->
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<xsl:variable name="accessibility.features.list.xml">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="$accessibility.feature"/>
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<xsl:with-param name="property.type" select="'feature'"/>
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</xsl:call-template>
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</xsl:variable>
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<!-- Parameter for accessibility hazards -->
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<xsl:variable name="accessibility.hazards.list.xml">
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<xsl:call-template name="get.accessibility.property.xml">
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<xsl:with-param name="terms.to.process" select="$accessibility.hazard"/>
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<xsl:with-param name="property.type" select="'hazard'"/>
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</xsl:call-template>
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</xsl:variable>
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<xsl:template name="generate.mimetype">
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<!-- Outputs "mimetype" file that meets EPUB 3.0 specifications: http://www.idpf.org/epub/30/spec/epub30-ocf.html#physical-container-zip-->
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<!-- Override this template if you want to customize mimetype output -->
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<xsl:if test="$metadata.ibooks-specified-fonts = 1">
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<meta property="ibooks:specified-fonts">true</meta>
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</xsl:if>
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<!-- Generate schema:accessMode elements for each term -->
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<xsl:for-each select="exsl:node-set($accessibility.modes.list.xml)//e:term">
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<meta property="schema:accessMode"><xsl:value-of select="."/></meta>
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</xsl:for-each>
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<!-- Generate schema:accessModeSufficient elements for each term -->
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<xsl:for-each select="exsl:node-set($accessibility.mode.sufficient.list.xml)//e:term">
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<meta property="schema:accessModeSufficient"><xsl:value-of select="."/></meta>
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</xsl:for-each>
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<!-- Generate schema:accessibilityFeature elements for each feature -->
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<xsl:for-each select="exsl:node-set($accessibility.features.list.xml)//e:feature">
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<meta property="schema:accessibilityFeature"><xsl:value-of select="."/></meta>
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</xsl:for-each>
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<!-- Generate schema:accessibilityHazard elements for each feature -->
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<xsl:for-each select="exsl:node-set($accessibility.hazards.list.xml)//e:hazard">
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<meta property="schema:accessibilityHazard"><xsl:value-of select="."/></meta>
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</xsl:for-each>
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</metadata>
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</xsl:template>
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