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Diffstat (limited to 'tools/boostbook/xsl/relative-href.xsl')
| -rw-r--r-- | tools/boostbook/xsl/relative-href.xsl | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/tools/boostbook/xsl/relative-href.xsl b/tools/boostbook/xsl/relative-href.xsl new file mode 100644 index 0000000000..8218d2f4c5 --- /dev/null +++ b/tools/boostbook/xsl/relative-href.xsl @@ -0,0 +1,98 @@ +<?xml version="1.0"?> +<!-- + Copyright (c) 2002 Douglas Gregor <doug.gregor -at- gmail.com> + + Distributed under the Boost Software License, Version 1.0. + (See accompanying file LICENSE_1_0.txt or copy at + http://www.boost.org/LICENSE_1_0.txt) + --> +<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" + version="1.0"> + +<xsl:import href="http://docbook.sourceforge.net/release/xsl/current/lib/lib.xsl"/> + +<!-- ==================================================================== --> + +<!-- Check if path is absolute + + Not attempting to fully parse or validate absolute vs. relative URI. + Assumes an absolute url when $target matches the regex '^[a-zA-Z.+-]*:' + + According to RFC1808, however, the colon (':') may also appear in a relative + URL. To workaround this limitation for relative links containing colons one + may use the alternatives below, instead. + + For the relative URI this:that use ./this:that or this%3Athat, instead. +--> +<xsl:template name="is.absolute.uri"> + <xsl:param name="uri"/> + + <xsl:variable name="scheme1" select="substring-before($uri, ':')"/> + <xsl:variable name="scheme2" select="translate($scheme1, 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+-.', '')"/> + + <xsl:choose> + <xsl:when test="$scheme1 and not($scheme2)">1</xsl:when> + <xsl:otherwise>0</xsl:otherwise> + </xsl:choose> +</xsl:template> + +<xsl:template name="href.target.relative"> + <xsl:param name="target"/> + <xsl:param name="context" select="."/> + + <xsl:variable name="isabsoluteuri"> + <xsl:call-template name="is.absolute.uri"> + <xsl:with-param name="uri" select="$target"/> + </xsl:call-template> + </xsl:variable> + + <xsl:choose> + <xsl:when test="$isabsoluteuri='1'"> + <xsl:value-of select="$target"/> + </xsl:when> + + <xsl:otherwise> + <xsl:variable name="href.to.uri" select="$target"/> + <xsl:variable name="href.from.uri"> + <xsl:call-template name="href.target.uri"> + <xsl:with-param name="object" select="$context"/> + </xsl:call-template> + </xsl:variable> + + <xsl:variable name="href.to"> + <xsl:call-template name="trim.common.uri.paths"> + <xsl:with-param name="uriA" select="$href.to.uri"/> + <xsl:with-param name="uriB" select="$href.from.uri"/> + <xsl:with-param name="return" select="'A'"/> + </xsl:call-template> + </xsl:variable> + + <xsl:variable name="href.from"> + <xsl:call-template name="trim.common.uri.paths"> + <xsl:with-param name="uriA" select="$href.to.uri"/> + <xsl:with-param name="uriB" select="$href.from.uri"/> + <xsl:with-param name="return" select="'B'"/> + </xsl:call-template> + </xsl:variable> + + <xsl:variable name="depth"> + <xsl:call-template name="count.uri.path.depth"> + <xsl:with-param name="filename" select="$href.from"/> + </xsl:call-template> + </xsl:variable> + + <xsl:variable name="href"> + <xsl:call-template name="copy-string"> + <xsl:with-param name="string" select="'../'"/> + <xsl:with-param name="count" select="$depth"/> + </xsl:call-template> + <xsl:value-of select="$href.to"/> + </xsl:variable> + + <xsl:value-of select="$href"/> + </xsl:otherwise> + </xsl:choose> + +</xsl:template> + +</xsl:stylesheet> |