# Copyright 2015 Jason Woofenden
# This file implements an WYSIWYG editor in the browser (no contenteditable)
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# encode text so it can be safely placed inside an html attribute
enc_attr_regex = new RegExp '(&)|(")|(\u00A0)', 'g'
enc_attr = (txt) ->
	return txt.replace enc_attr_regex, (match, amp, quote) ->
		return '&amp;' if (amp)
		return '&quot;' if (quote)
		return '&nbsp;'

void_elements = {
	area: true
	base: true
	br: true
	col: true
	embed: true
	hr: true
	img: true
	input: true
	keygen: true
	link: true
	meta: true
	param: true
	source: true
	track: true
	wbr: true
}
dom_to_html = (dom) ->
	ret = ''
	for el in dom
		switch el.type
			when wheic_parser.TYPE_TAG
				ret += '<' + el.name
				attr_keys = []
				for k of el.attrs
					attr_keys.unshift k
				#attr_keys.sort()
				for k in attr_keys
					ret += " #{k}"
					if el.attrs[k].length > 0
						ret += "=\"#{enc_attr el.attrs[k]}\""
				ret += '>'
				unless void_elements[el.name]
					if el.children.length
						ret += dom_to_html el.children
					ret += "</#{el.name}>"
			when wheic_parser.TYPE_TEXT
				ret += el.text
			when wheic_parser.TYPE_COMMENT
				ret += "<!--#{el.text}-->"
			when wheic_parser.TYPE_DOCTYPE
				ret += "<!DOCTYPE #{el.name}"
				if el.public_identifier? and el.public_identifier.length > 0
					ret += " \"#{el.public_identifier}\""
				if el.system_identifier? and el.system_identifier.length > 0
					ret += " \"#{el.system_identifier}\""
				ret += ">\n"
	return ret

wysiwyg = (el, options = {}) ->
	opt_fragment = options.fragment ? true
	parser_opts = {}
	if opt_fragment
		parser_opts.fragment = 'body'
	editor_instance = dom: wheic_parser.parse(el.value, parser_opts)
	# el.value = dom_to_html dom
	return editor_instance

window.wheic = {
	wysiwyg: wysiwyg
	dom_to_html: dom_to_html
}

# test in browser: wheic(document.getElementsByTagName('textarea')[0])