<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
				xmlns="http://www.w3.org/1999/xhtml"
				xmlns:h="http://www.w3.org/1999/xhtml"
				xmlns:s="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/strana"
				xmlns:k="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/konfigurace"
				xmlns:m="https://trac.frantovo.cz/xml-web-generator/wiki/xmlns/makro"
				xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
				xmlns:fn="http://www.w3.org/2005/xpath-functions"
				xmlns:svg="http://www.w3.org/2000/svg"
				xmlns:xs="http://www.w3.org/2001/XMLSchema"
				exclude-result-prefixes="fn h s k m xs">
	
	<!--
		Images
		******
		Generates an XHTML img tag in a paragraph for given image.
		Title and Alt are filled with the EXIF comment field.
		Requires a command line tool: exiv2
		*
		@src path to the image file relative to the input directory (where web.conf resides)
	-->
	<xsl:template match="m:img">
		<xsl:variable name="script">
			<m:skript jazyk="bash" výstup="xml">
				DIR=$(dirname "$XWG_STRANKA_SOUBOR");
				DIR="$DIR/../vstup"
				cd "$DIR";
				
				<![CDATA[echo -n '<metadata>';]]>
				
				<![CDATA[echo -n '<description>';]]>
				exiv2 "<xsl:value-of select="@src"/>" | <![CDATA[perl -ne 'if (/Exif comment\s*:\s*(.*)/) { print "$1"; }' ]]> | <m:escape-xml/>
				<![CDATA[echo -n '</description>';]]>
				
				<![CDATA[echo -n '</metadata>';]]>
			</m:skript>
		</xsl:variable>

		<xsl:variable name="scriptResult">
			<xsl:apply-templates select="$script/node()"/>
		</xsl:variable>
		
		<p class="img-container">
			<!--
				TODO: check whether the thumbnail exists and if yes, disply it and link to the full image.
			-->
			<a href="{@src}">
				<img src="{@src}"
					 alt  ="{$scriptResult/h:metadata/h:description}" 
					 title="{$scriptResult/h:metadata/h:description}"/>
			</a>
		</p>
		
	</xsl:template>

</xsl:stylesheet>