source: main/trunk/greenstone3/web/interfaces/core/transform/preProcess.xsl@ 25880

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0" 
  xmlns:gsf="http://www.greenstone.org/greenstone3/schema/ConfigFormat"
  xmlns:gslib="http://www.greenstone.org/skinning"
    xmlns:gsvar="http://www.greenstone.org/skinning-var"
  xmlns:java="http://xml.apache.org/xslt/java"
  xmlns:util="xalan://org.greenstone.gsdl3.util.XSLTUtil"
  xmlns:xalan="http://xml.apache.org/xalan"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
  xmlns:xslt="output.xsl"
  xmlns:gs3="http://www.greenstone.org/gs3"
  >

  <xsl:output method="xml"/>
  <xsl:namespace-alias
    stylesheet-prefix="xslt" result-prefix="xsl"/>

  <xsl:template match="/">

    <!-- explicitly output the stylesheet element here so we can include the
    namespace declarations. They were going missing before with the new xalan/xerces-->
    <xslt:stylesheet>
      
      <xsl:for-each select="/skinAndLibraryXsl/skinXsl/xsl:stylesheet">
    
    <!-- produce an exact copy of skin stylesheet, with gslib nodes expanded. -->
    <xsl:for-each select="@*">
      <xsl:variable name="attribute-name" select="name()"/>
      <xsl:attribute name="{$attribute-name}">
        <xsl:value-of select="."/>
      </xsl:attribute>
    </xsl:for-each>
    <!-- merge the attributes of the library stylesheet -->
    <xsl:for-each select="/skinAndLibraryXsl/libraryXsl/xsl:stylesheet/@*">
      <xsl:variable name="attribute-name" select="name()"/>
      <xsl:attribute name="{$attribute-name}">
        <xsl:value-of select="."/>
      </xsl:attribute>
    </xsl:for-each>
    
    <xsl:call-template name="expand_gslib_elements" />
    
    <!-- add content of library to the skin stylesheet -->
    <xsl:for-each select="/skinAndLibraryXsl/libraryXsl/xsl:stylesheet">
      <xsl:call-template name="expand_gslib_elements" />
    </xsl:for-each>
    
      </xsl:for-each>
    </xslt:stylesheet>
    
    
  </xsl:template>


  <!-- produce an exact copy of the current node, but expand and replace all elements belonging to the gslib namespace. -->
  <xsl:template name="expand_gslib_elements">


    <xsl:for-each select="*|text()">
      <xsl:choose>
    
    <xsl:when test="namespace-uri(.)=namespace::gsvar">
      <xsl:element name="xsl:value-of">
        <xsl:attribute name="select">$<xsl:value-of select="local-name()" /></xsl:attribute>
          </xsl:element>
</xsl:when>
    <!-- if node has gslib prefix, expand it into appropriate copy-of or call-template element -->
    <xsl:when test="namespace-uri(.)=namespace::gslib">
      
      <xsl:variable name="name" select="local-name()"/>
      <xsl:choose>
        
        <!-- if library contains a variable of this name, expand to it's value -->
        <xsl:when test="/skinAndLibraryXsl/libraryXsl//xsl:variable[@name = $name]">
          <xsl:element name="xsl:copy-of">
        <xsl:attribute name="select">$<xsl:value-of select="local-name()" /></xsl:attribute>
          </xsl:element>
        </xsl:when>
        
        
        <!-- if library contains a template of this name, expand to a call-template and pass attributes as parameters -->
        <xsl:otherwise>
          <xsl:element name="xsl:call-template">
        <xsl:attribute name="name"> <xsl:value-of select="local-name()" /></xsl:attribute>
        
        <xsl:for-each select="@*">
          <xsl:element name="xsl:with-param">
            <xsl:attribute name="name"><xsl:value-of select="name()"/></xsl:attribute>
            <xsl:call-template name="convert_attVal_to_valueOf" />
          </xsl:element>                    
        </xsl:for-each> 
          </xsl:element>
        </xsl:otherwise>
        
      </xsl:choose> 
    </xsl:when>

    <xsl:when test="self::text()">
      <xsl:value-of select="."/>
    </xsl:when>

    <!-- if a regular node v2 -->
    <xsl:otherwise>
      <xsl:variable name="element-name" select="name()"/>
      <xsl:variable name="element-namespace" select="namespace-uri()"/>
      <xsl:element name="{$element-name}" namespace="{$element-namespace}">
        <xsl:for-each select="@*">
          <xsl:variable name="attribute-name" select="name()"/>
          <xsl:attribute name="{$attribute-name}">
        <xsl:value-of select="."/>
          </xsl:attribute>
        </xsl:for-each>
        <xsl:call-template name="expand_gslib_elements" />
      </xsl:element>
    </xsl:otherwise>
    
    
      </xsl:choose>
    </xsl:for-each>

  </xsl:template>

  <!-- converts an attribute value (the current node) into either a literal value or an <xsl:value-of> element -->
  <xsl:template name="convert_attVal_to_valueOf">

    <xsl:choose>
      <!-- if attribute is not literal (starts with a "{") -->
      <xsl:when test="starts-with(string(), '&#123;')">
    <xsl:element name="xsl:value-of">
      <xsl:attribute name="disable-output-escaping">yes</xsl:attribute>
      <xsl:attribute name="select"><xsl:value-of select="substring(string(),2,string-length()-2)"/></xsl:attribute>
    </xsl:element>
      </xsl:when>
      <xsl:otherwise>
    <xsl:value-of select="."/>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <xsl:template name="create_dummy_variables">
    <xsl:for-each select="//*[namespace-uri()=namespace::gslib]">
      <xsl:element name="xsl:variable">
    <xsl:attribute name="name">
      <xsl:value-of select="local-name()"/>
    </xsl:attribute>
      </xsl:element>    
    </xsl:for-each>
  </xsl:template>
  
  
</xsl:stylesheet>