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# frozen_string_literal: false
require_relative "child"
require_relative "source"
module REXML
# Represents an XML Instruction; IE, <? ... ?>
# TODO: Add parent arg (3rd arg) to constructor
class Instruction < Child
START = "<?"
STOP = "?>"
# target is the "name" of the Instruction; IE, the "tag" in <?tag ...?>
# content is everything else.
attr_accessor :target, :content
# Constructs a new Instruction
# @param target can be one of a number of things. If String, then
# the target of this instruction is set to this. If an Instruction,
# then the Instruction is shallowly cloned (target and content are
# copied).
# @param content Must be either a String, or a Parent. Can only
# be a Parent if the target argument is a Source. Otherwise, this
# String is set as the content of this instruction.
def initialize(target, content=nil)
case target
when String
super()
@target = target
@content = content
when Instruction
super(content)
@target = target.target
@content = target.content
else
message =
"processing instruction target must be String or REXML::Instruction: "
message << "<#{target.inspect}>"
raise ArgumentError, message
end
@content.strip! if @content
end
def clone
Instruction.new self
end
# == DEPRECATED
# See the rexml/formatters package
#
def write writer, indent=-1, transitive=false, ie_hack=false
Kernel.warn( "#{self.class.name}.write is deprecated", uplevel: 1)
indent(writer, indent)
writer << START
writer << @target
if @content
writer << ' '
writer << @content
end
writer << STOP
end
# @return true if other is an Instruction, and the content and target
# of the other matches the target and content of this object.
def ==( other )
other.kind_of? Instruction and
other.target == @target and
other.content == @content
end
def node_type
:processing_instruction
end
def inspect
"<?p-i #{target} ...?>"
end
end
end
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