Class: Canon::Formatters::XmlFormatter

Inherits:
Object
  • Object
show all
Defined in:
lib/canon/formatters/xml_formatter.rb

Overview

XML formatter for canonicalization

Constant Summary collapse

NOKOGIRI_C14N_XSL =

Source of XSLT emmanueloga.wordpress.com/2009/09/29/pretty-printing-xhtml-with-nokogiri-and-xslt/

<<~XSL
  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" encoding="ISO-8859-1"/>
    <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

Class Method Summary collapse

Class Method Details

.format(xml) ⇒ Object 



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# File 'lib/canon/formatters/xml_formatter.rb', line 59

def self.format(xml)
  Nokogiri::XSLT(NOKOGIRI_C14N_XSL)
    .transform(Nokogiri::XML(xml, &:noblanks))
    .to_xml(indent: 2, pretty: true, encoding: "UTF-8")
end

.parse(xml) ⇒ Object 



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# File 'lib/canon/formatters/xml_formatter.rb', line 65

def self.parse(xml)
  Nokogiri::XML(xml)
end