Port `blog.kummerlaender.eu` code block handling for commit messages

1 files changed, 57 insertions, 2 deletions

diff --git a/utility/formatter.xsl b/utility/formatter.xsl
index d2c2f7c..2c7f3b9 100644
--- a/utility/formatter.xsl
+++ b/utility/formatter.xsl
@@ -2,11 +2,12 @@
 <xsl:stylesheet
 	version="1.0"
 	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:xalan="http://xml.apache.org/xalan"
 	xmlns:InputXSLT="function.inputxslt.application"
-	exclude-result-prefixes="InputXSLT"
+	exclude-result-prefixes="xalan InputXSLT"
 >
 
-<xsl:template name="formatter">
+<xsl:template name="plain_formatter">
 	<xsl:param name="format"/>
 	<xsl:param name="source"/>
 
@@ -16,4 +17,58 @@
 	)/self::command/node()"/>
 </xsl:template>
 
+<xsl:template name="highlighter">
+	<xsl:param name="source"/>
+	<xsl:param name="language"/>
+
+	<xsl:variable name="formatted_code">
+		<xsl:call-template name="plain_formatter">
+			<xsl:with-param name="format">
+				<xsl:text>highlight --out-format=xhtml --inline-css --style=molokai --fragment --enclose-pre --wrap-simple --syntax=</xsl:text>
+				<xsl:value-of select="$language"/>
+			</xsl:with-param>
+			<xsl:with-param name="source" select="$source"/>
+		</xsl:call-template>
+	</xsl:variable>
+
+	<pre>
+		<xsl:copy-of select="xalan:nodeset($formatted_code)/pre/node()"/>
+	</pre>
+</xsl:template>
+
+<xsl:template match="@*|node()" mode="embellish">
+	<xsl:copy>
+		<xsl:apply-templates select="@*|node()" mode="embellish"/>
+	</xsl:copy>
+</xsl:template>
+
+<xsl:template match="pre" mode="embellish">
+	<xsl:call-template name="highlighter">
+		<xsl:with-param name="source" select="code/text()"/>
+		<xsl:with-param name="language">
+			<xsl:choose>
+				<xsl:when test="code/@class">
+					<xsl:value-of select="substring(code/@class, 10, string-length(code/@class))"/>
+				</xsl:when>
+				<xsl:otherwise>
+					<xsl:text>txt</xsl:text>
+				</xsl:otherwise>
+			</xsl:choose>
+		</xsl:with-param>
+	</xsl:call-template>
+</xsl:template>
+
+<xsl:template name="formatter">
+	<xsl:param name="source"/>
+
+	<xsl:variable name="content">
+		<xsl:call-template name="plain_formatter">
+			<xsl:with-param name="format">kramdown</xsl:with-param>
+			<xsl:with-param name="source" select="$source"/>
+		</xsl:call-template>
+	</xsl:variable>
+
+	<xsl:apply-templates select="xalan:nodeset($content)" mode="embellish"/>
+</xsl:template>
+
 </xsl:stylesheet>