Module: PrettyXML

Defined in:
lib/pretty-xml.rb

Instance Method Summary collapse

Instance Method Details

#write(buffer) ⇒ Object Also known as: print



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# File 'lib/pretty-xml.rb', line 9

def write(buffer)

xsl =<<XSL
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" encoding="UTF-8"/>
<xsl:param name="indent-increment" select="'   '"/>

<xsl:template name="newline">
  <xsl:text disable-output-escaping="yes">
</xsl:text>
</xsl:template>

<xsl:template match="comment() | processing-instruction()">
  <xsl:param name="indent" select="''"/>
  <xsl:call-template name="newline"/>    
  <xsl:value-of select="$indent"/>
  <xsl:copy />
</xsl:template>

<xsl:template match="text()">
  <xsl:param name="indent" select="''"/>
  <xsl:call-template name="newline"/>    
  <xsl:value-of select="$indent"/>
  <xsl:value-of select="normalize-space(.)"/>
</xsl:template>
  
<xsl:template match="text()[normalize-space(.)='']"/>

<xsl:template match="*">
  <xsl:param name="indent" select="''"/>
  <xsl:call-template name="newline"/>    
  <xsl:value-of select="$indent"/>
    <xsl:choose>
     <xsl:when test="count(child::*) > 0">
      <xsl:copy>
       <xsl:copy-of select="@*"/>
       <xsl:apply-templates select="*|text()">
         <xsl:with-param name="indent" select="concat ($indent, $indent-increment)"/>
       </xsl:apply-templates>
       <xsl:call-template name="newline"/>
       <xsl:value-of select="$indent"/>
      </xsl:copy>
     </xsl:when>       
     <xsl:otherwise>
      <xsl:copy-of select="."/>
     </xsl:otherwise>
   </xsl:choose>
</xsl:template>    
</xsl:stylesheet>
XSL

  doc = Nokogiri::XML(buffer)
  xslt = Nokogiri::XSLT(xsl)
  out =  xslt.transform(doc)
  out.to_xml
end