# el.sh --- insert html elements using sh

### Code:

## Escape < and > with backslashes.
EL_ESCAPE=true

el() { # el NAME ARGS...
	## Create an HTML element named NAME using ARGS.
	# Any ARGS that contain an equals sign will be made into attributes of the
	# element, until the special argument '--' which will stop attribute
	# processing.  While some nesting is possible with 'el', the way bash
	# expansion works it's not great.
	#
	# No validation is done on any arguments in this function.  It could create
	# something that looks vaguely like an HTML element but isn't valid.
	_name="$1"
	shift || return 1 # Require at least an element name
	_element="$_name"
	_content=""
	_process_args=true

	while test -n "$1"; do
		case "$1" in
			--)
				if "$_process_args"; then
					_process_args=false
				else
					_content="$_content${_content:+ }$1"
				fi
				;;
			'\<'*)
				_process_args=false
				_content="$_content${_content:+ }$1"
				;;
			*=*)
				if "$_process_args"; then
					_element="$_element ${1%%=*}=\"${1#*=}\""
				else
					_content="$_content${_content:+ }$1"
				fi
				;;
			*)
				if "$_process_args"; then
					_process_args=false
				fi
				_content="$_content${_content:+ }$1"
				;;
		esac
		shift
	done
	if $EL_ESCAPE; then
		fmt='\<%s\>%s\</%s\>\n'
	else
		fmt='<%s>%s</%s>\n'
	fi
	printf "$fmt" "$_element" "$_content" "$_name"
}

### HTML5 element aliases
## These come from https://developer.mozilla.org/en-US/docs/Web/HTML/Element

# To avoid clobbering the shell's namespace, a prefix is used.  Change this
# variable when sourcing el.sh in order to change or disable the prefix.  E.g.:
# $ EL_PREFIX= . ./el.sh
# $ EL_PREFIX=HTML . ./el.sh
: "${EL_PREFIX:=_}"

for e in \
	html \
	base \
	head \
	link \
	meta \
	style \
	title \
	body \
	address \
	article \
	aside \
	footer \
	header \
	h1 \
	h2 \
	h3 \
	h4 \
	h5 \
	h6 \
	main \
	nav \
	section \
	blockquote \
	dd \
	div \
	dl \
	dt \
	figcaption \
	figure \
	hr \
	li \
	menu \
	ol \
	p \
	pre \
	ul \
	a \
	abbr \
	b \
	bdi \
	bdo \
	br \
	cite \
	code \
	data \
	dfn \
	em \
	i \
	kbd \
	mark \
	q \
	rp \
	rt \
	ruby \
	s \
	samp \
	small \
	span \
	strong \
	sub \
	sup \
	time \
	u \
	var \
	wbr \
	area \
	audio \
	img \
	map \
	track \
	video \
	embed \
	iframe \
	object \
	picture \
	portal \
	source \
	svg \
	math \
	canvas \
	noscript \
	script \
	del \
	ins \
	caption \
	col \
	colgroup \
	table \
	tbody \
	td \
	tfoot \
	th \
	thead \
	tr \
	button \
	datalist \
	fieldset \
	form \
	input \
	label \
	legend \
	meter \
	optgroup \
	option \
	output \
	progress \
	select \
	textarea \
	details \
	dialog \
	summary \
	slot \
	template \
	acronym \
	applet \
	bgsound \
	big \
	blink \
	center \
	content \
	dir \
	font \
	frame \
	frameset \
	image \
	keygen \
	marquee \
	menuitem \
	nobr \
	noembed \
	noframes \
	param \
	plaintext \
	rb \
	rtc \
	shadow \
	spacer \
	strike \
	tt \
	xmp; do
	eval "alias $EL_PREFIX$e='el $e'"
done

# el.sh ends here