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module REXML
# Represents text in an XML document
class Text < Child
include Comparable
# string is String content, raw is a boolean
attr_reader :string
attr_accessor :raw
PATTERN = /\A([^<]*)/um
ILLEGAL = /<|&(?!#?[\w-]+;)/u
# Constructor
# @param arg if a String, the content is set to the String. If a Text,
# the object is shallowly cloned. If a Source, the source is parsed
# for text content up to the next element. If a parent, the parent of
# this object is set to the argument.
# @param whitespace (boolean, optional) if true, whitespace is respected
# @param parent (Parent, optional) if given, the parent of this object
# will be set to the argument
def initialize(arg, respect_whitespace=false, parent=nil, pattern=PATTERN, raw=false)
@raw = raw
if parent
if parent == true
@raw = true
elsif parent.kind_of? Parent
super( parent )
@raw = parent.raw
end
end
if arg.kind_of? Source
md = arg.match(pattern, true)
raise "no text to add" if md[0].length == 0
@string = md[1]
@string.squeeze!(" \n\t") unless respect_whitespace
@string = read_with_substitution(@string, ILLEGAL) unless @raw
elsif arg.kind_of? String
super()
@string = arg.clone
@string.squeeze!(" \n\t") unless respect_whitespace
@string = read_with_substitution(@string) unless @raw
elsif arg.kind_of? Text
super()
@string = arg.string
@raw = arg.raw
elsif arg.kind_of? Parent
super( arg )
elsif [true,false].include? arg
@raw = arg
end
end
def clone
return Text.new(self)
end
# @param other a String or a Text
# @return the result of (to_s <=> arg.to_s)
def <=>( other )
@string <=> other.to_s
end
def to_s
@string
end
def write( writer, indent=0 )
indent( writer, indent )
if @raw
writer << @string
else
write_with_substitution( writer, @string )
end
end
def Text.parse_stream source, listener
listener.text source.match(PATTERN, true)[0]
end
end
end
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