/usr/lib/ruby/1.8/rexml/attribute.rb is in libruby1.8 1.8.7.352-2ubuntu1.6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | require "rexml/namespace"
require 'rexml/text'
module REXML
# Defines an Element Attribute; IE, a attribute=value pair, as in:
# <element attribute="value"/>. Attributes can be in their own
# namespaces. General users of REXML will not interact with the
# Attribute class much.
class Attribute
include Node
include Namespace
# The element to which this attribute belongs
attr_reader :element
# The normalized value of this attribute. That is, the attribute with
# entities intact.
attr_writer :normalized
PATTERN = /\s*(#{NAME_STR})\s*=\s*(["'])(.*?)\2/um
# Constructor.
# FIXME: The parser doesn't catch illegal characters in attributes
#
# first::
# Either: an Attribute, which this new attribute will become a
# clone of; or a String, which is the name of this attribute
# second::
# If +first+ is an Attribute, then this may be an Element, or nil.
# If nil, then the Element parent of this attribute is the parent
# of the +first+ Attribute. If the first argument is a String,
# then this must also be a String, and is the content of the attribute.
# If this is the content, it must be fully normalized (contain no
# illegal characters).
# parent::
# Ignored unless +first+ is a String; otherwise, may be the Element
# parent of this attribute, or nil.
#
#
# Attribute.new( attribute_to_clone )
# Attribute.new( attribute_to_clone, parent_element )
# Attribute.new( "attr", "attr_value" )
# Attribute.new( "attr", "attr_value", parent_element )
def initialize( first, second=nil, parent=nil )
@normalized = @unnormalized = @element = nil
if first.kind_of? Attribute
self.name = first.expanded_name
@unnormalized = first.value
if second.kind_of? Element
@element = second
else
@element = first.element
end
elsif first.kind_of? String
@element = parent
self.name = first
@normalized = second.to_s
else
raise "illegal argument #{first.class.name} to Attribute constructor"
end
end
# Returns the namespace of the attribute.
#
# e = Element.new( "elns:myelement" )
# e.add_attribute( "nsa:a", "aval" )
# e.add_attribute( "b", "bval" )
# e.attributes.get_attribute( "a" ).prefix # -> "nsa"
# e.attributes.get_attribute( "b" ).prefix # -> "elns"
# a = Attribute.new( "x", "y" )
# a.prefix # -> ""
def prefix
pf = super
if pf == ""
pf = @element.prefix if @element
end
pf
end
# Returns the namespace URL, if defined, or nil otherwise
#
# e = Element.new("el")
# e.add_attributes({"xmlns:ns", "http://url"})
# e.namespace( "ns" ) # -> "http://url"
def namespace arg=nil
arg = prefix if arg.nil?
@element.namespace arg
end
# Returns true if other is an Attribute and has the same name and value,
# false otherwise.
def ==( other )
other.kind_of?(Attribute) and other.name==name and other.value==value
end
# Creates (and returns) a hash from both the name and value
def hash
name.hash + value.hash
end
# Returns this attribute out as XML source, expanding the name
#
# a = Attribute.new( "x", "y" )
# a.to_string # -> "x='y'"
# b = Attribute.new( "ns:x", "y" )
# b.to_string # -> "ns:x='y'"
def to_string
if @element and @element.context and @element.context[:attribute_quote] == :quote
%Q^#@expanded_name="#{to_s().gsub(/"/, '"e;')}"^
else
"#@expanded_name='#{to_s().gsub(/'/, ''')}'"
end
end
# Returns the attribute value, with entities replaced
def to_s
return @normalized if @normalized
doctype = nil
if @element
doc = @element.document
doctype = doc.doctype if doc
end
@normalized = Text::normalize( @unnormalized, doctype )
@unnormalized = nil
@normalized
end
# Returns the UNNORMALIZED value of this attribute. That is, entities
# have been expanded to their values
def value
return @unnormalized if @unnormalized
doctype = nil
if @element
doc = @element.document
doctype = doc.doctype if doc
end
@unnormalized = Text::unnormalize( @normalized, doctype )
@normalized = nil
@unnormalized
end
# Returns a copy of this attribute
def clone
Attribute.new self
end
# Sets the element of which this object is an attribute. Normally, this
# is not directly called.
#
# Returns this attribute
def element=( element )
@element = element
self
end
# Removes this Attribute from the tree, and returns true if successfull
#
# This method is usually not called directly.
def remove
@element.attributes.delete self.name unless @element.nil?
end
# Writes this attribute (EG, puts 'key="value"' to the output)
def write( output, indent=-1 )
output << to_string
end
def node_type
:attribute
end
def inspect
rv = ""
write( rv )
rv
end
def xpath
path = @element.xpath
path += "/@#{self.expanded_name}"
return path
end
end
end
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