Module: Nokogiri::XSLT

Relationships & Source Files
Namespace Children
Classes: `Stylesheet`
Defined in:	lib/nokogiri/xslt.rb, ext/nokogiri/nokogiri.c, ext/nokogiri/xslt_stylesheet.c, lib/nokogiri/xslt/stylesheet.rb

Overview

See Stylesheet for creating and manipulating Stylesheet object.

Class Method Summary

.parse(xsl) → Nokogiri::XSLT::Stylesheet)

Parse the stylesheet in xsl, registering optional modules as custom class handlers.
.quote_params(params) → Array)

Quote parameters in params for stylesheet safety.
.register(uri, custom_handler_class)

Register a class that implements custom XSLT transformation functions.

Class Method Details

.parse(xsl) → Nokogiri::XSLT::Stylesheet) .parse(xsl, modules) → Nokogiri::XSLT::Stylesheet)

Parse the stylesheet in xsl, registering optional modules as custom class handlers.

Parameters

xsl (String) XSL content to be parsed into a stylesheet
modules (Hash<String ⇒ Class>) A hash of URI-to-handler relations for linking a namespace to a custom function handler.

⚠ The XSLT handler classes are registered globally.

Also see .register

Example

xml = Nokogiri.XML(<<~XML)
  <nodes>
    <node>Foo</node>
    <node>Bar</node>
  </nodes>
XML

handler = Class.new do
  def reverse(node)
    node.text.reverse
  end
end

xsl = <<~XSL
  <xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:myfuncs="http://nokogiri.org/xslt/myfuncs"
    extension-element-prefixes="myfuncs">
    <xsl:template match="/">
      <reversed>
        <xsl:for-each select="nodes/node">
          <reverse><xsl:copy-of select="myfuncs:reverse(.)"/></reverse>
        </xsl:for-each>
      </reversed>
    </xsl:template>
  </xsl:stylesheet>
XSL

xsl = Nokogiri.XSLT(xsl, "http://nokogiri.org/xslt/myfuncs" => handler)
xsl.transform(xml).to_xml
# => "<?xml version=\"1.0\"?>\n" +
#    "<reversed>\n" +
#    "  <reverse>ooF</reverse>\n" +
#    "  <reverse>raB</reverse>\n" +
#    "</reversed>\n"

[ GitHub ]

# File 'lib/nokogiri/xslt.rb', line 76


def parse(string, modules = {})
  modules.each do |url, klass|
    XSLT.register(url, klass)
  end

  doc = XML::Document.parse(string, nil, nil, XML::ParseOptions::DEFAULT_XSLT)
  if Nokogiri.jruby?
    Stylesheet.parse_stylesheet_doc(doc, string)
  else
    Stylesheet.parse_stylesheet_doc(doc)
  end
end

.quote_params(params) → Array)

Quote parameters in params for stylesheet safety. See Nokogiri::XSLT::Stylesheet.transform for example usage.

Parameters

params (Hash, Array) XSLT parameters (key->value, or tuples of [key, value])

Returns: Array of string parameters, with quotes correctly escaped for use with Stylesheet#transform

[ GitHub ]

# File 'lib/nokogiri/xslt.rb', line 100


def quote_params(params)
  params.flatten.each_slice(2).with_object([]) do |kv, quoted_params|
    key, value = kv.map(&:to_s)
    value = if value.include?("'")
      "concat('#{value.gsub("'", %q{', "'", '})}')"
    else
      "'#{value}'"
    end
    quoted_params << key
    quoted_params << value
  end
end

.register(uri, custom_handler_class)

⚠ The XSLT handler classes are registered globally.

[Parameters}

uri (String) The namespace for the custom handlers
custom_handler_class (Class) A class with ruby methods that can be called during transformation

See .parse for usage.

Raises:

(NotImplementedError)

[ GitHub ]

# File 'ext/nokogiri/xslt_stylesheet.c', line 391


static VALUE
rb_xslt_s_register(VALUE self, VALUE uri, VALUE obj)
{
  VALUE modules = rb_iv_get(self, "@modules");
  if (NIL_P(modules)) {
    rb_raise(rb_eRuntimeError, "internal error: @modules not set");
  }

  rb_hash_aset(modules, uri, obj);
  xsltRegisterExtModule(
    (unsigned char *)StringValueCStr(uri),
    initFunc,
    shutdownFunc
  );
  return self;
}