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104 lines
5.2 KiB
XML
104 lines
5.2 KiB
XML
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:func="http://exslt.org/functions" xmlns:date="http://exslt.org/dates-and-times" extension-element-prefixes="date func">
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<!-- clou'd from http://exslt.org/date/functions/week-in-year/index.html (by "Jeni Tennison" <mail@jenitennison.com>) -->
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<xsl:param name="date:date-time" select="'2000-01-01T00:00:00Z'"/>
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<date:month-lengths>
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<date:month>31</date:month>
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<date:month>28</date:month>
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<date:month>31</date:month>
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<date:month>30</date:month>
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<date:month>31</date:month>
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<date:month>30</date:month>
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<date:month>31</date:month>
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<date:month>31</date:month>
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<date:month>30</date:month>
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<date:month>31</date:month>
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<date:month>30</date:month>
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<date:month>31</date:month>
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</date:month-lengths>
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<func:function name="date:week-in-year">
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<xsl:param name="date-time">
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<xsl:choose>
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<xsl:when test="function-available('date:date-time')">
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<xsl:value-of select="date:date-time()"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="$date:date-time"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:param>
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<xsl:variable name="neg" select="starts-with($date-time, '-')"/>
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<xsl:variable name="dt-no-neg">
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<xsl:choose>
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<xsl:when test="$neg or starts-with($date-time, '+')">
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<xsl:value-of select="substring($date-time, 2)"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="$date-time"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:variable>
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<xsl:variable name="dt-no-neg-length" select="string-length($dt-no-neg)"/>
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<xsl:variable name="timezone">
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<xsl:choose>
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<xsl:when test="substring($dt-no-neg, $dt-no-neg-length) = 'Z'">Z</xsl:when>
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<xsl:otherwise>
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<xsl:variable name="tz" select="substring($dt-no-neg, $dt-no-neg-length - 5)"/>
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<xsl:if test="(substring($tz, 1, 1) = '-' or substring($tz, 1, 1) = '+') and substring($tz, 4, 1) = ':'">
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<xsl:value-of select="$tz"/>
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</xsl:if>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:variable>
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<xsl:variable name="week">
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<xsl:if test="not(string($timezone)) or $timezone = 'Z' or (substring($timezone, 2, 2) <= 23 and substring($timezone, 5, 2) <= 59)">
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<xsl:variable name="dt" select="substring($dt-no-neg, 1, $dt-no-neg-length - string-length($timezone))"/>
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<xsl:variable name="dt-length" select="string-length($dt)"/>
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<xsl:variable name="year" select="substring($dt, 1, 4)"/>
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<xsl:variable name="leap" select="(not($year mod 4) and $year mod 100) or not($year mod 400)"/>
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<xsl:variable name="month" select="substring($dt, 6, 2)"/>
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<xsl:variable name="day" select="substring($dt, 9, 2)"/>
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<xsl:if test="number($year) and substring($dt, 5, 1) = '-' and $month <= 12 and substring($dt, 8, 1) = '-' and $day <= 31 and ($dt-length = 10 or (substring($dt, 11, 1) = 'T' and substring($dt, 12, 2) <= 23 and substring($dt, 14, 1) = ':' and substring($dt, 15, 2) <= 59 and substring($dt, 17, 1) = ':' and substring($dt, 18) <= 60))">
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<xsl:variable name="month-days" select="sum(document('')/*/date:month-lengths/date:month[position() < $month])"/>
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<xsl:value-of select="date:_week-in-year($month-days + $day + ($leap and $month > 2), $year)"/>
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</xsl:if>
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</xsl:if>
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</xsl:variable>
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<func:result select="number($week)"/>
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</func:function>
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<func:function name="date:_week-in-year">
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<xsl:param name="days"/>
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<xsl:param name="year"/>
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<xsl:variable name="y-1" select="$year - 1"/>
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<!-- this gives the day of the week, counting from Sunday = 0 -->
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<xsl:variable name="day-of-week" select="($y-1 + floor($y-1 div 4) - floor($y-1 div 100) + floor($y-1 div 400) + $days) mod 7"/>
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<!-- this gives the day of the week, counting from Monday = 1 -->
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<xsl:variable name="dow">
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<xsl:choose>
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<xsl:when test="$day-of-week"><xsl:value-of select="$day-of-week"/></xsl:when>
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<xsl:otherwise>7</xsl:otherwise>
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</xsl:choose>
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</xsl:variable>
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<xsl:variable name="start-day" select="($days - $dow + 7) mod 7"/>
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<xsl:variable name="week-number" select="floor(($days - $dow + 7) div 7)"/>
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<xsl:choose>
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<xsl:when test="$start-day >= 4">
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<func:result select="$week-number + 1"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:choose>
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<xsl:when test="not($week-number)">
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<func:result select="date:_week-in-year(365 + ((not($y-1 mod 4) and $y-1 mod 100) or not($y-1 mod 400)), $y-1)"/>
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</xsl:when>
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<xsl:otherwise>
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<func:result select="$week-number"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:otherwise>
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</xsl:choose>
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</func:function>
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</xsl:stylesheet>
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