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#!/usr/bin/env ruby
#--
# Copyright 2004 by Jim Weirich (jim@weirichhouse.org).
# All rights reserved.
# Permission is granted for use, copying, modification, distribution,
# and distribution of modified versions of this work as long as the
# above copyright notice is included.
#++
require 'builder/xmlmarkup'
module Builder
# Create a series of SAX-like XML events (e.g. start_tag, end_tag)
# from the markup code. XmlEvent objects are used in a way similar
# to XmlMarkup objects, except that a series of events are generated
# and passed to a handler rather than generating character-based
# markup.
#
# Usage:
# xe = Builder::XmlEvents.new(handler)
# xe.title("HI") # Sends start_tag/end_tag/text messages to the handler.
#
# Indentation may also be selected by providing value for the
# indentation size and initial indentation level.
#
# xe = Builder::XmlEvents.new(handler, indent_size, initial_indent_level)
#
# == XML Event Handler
#
# The handler object must expect the following events.
#
# [<tt>start_tag(tag, attrs)</tt>]
# Announces that a new tag has been found. +tag+ is the name of
# the tag and +attrs+ is a hash of attributes for the tag.
#
# [<tt>end_tag(tag)</tt>]
# Announces that an end tag for +tag+ has been found.
#
# [<tt>text(text)</tt>]
# Announces that a string of characters (+text+) has been found.
# A series of characters may be broken up into more than one
# +text+ call, so the client cannot assume that a single
# callback contains all the text data.
#
class XmlEvents < XmlMarkup
def text!(text)
@target.text(text)
end
def _start_tag(sym, attrs, end_too=false)
@target.start_tag(sym, attrs)
_end_tag(sym) if end_too
end
def _end_tag(sym)
@target.end_tag(sym)
end
end
end
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