Clickable utilities in the XSLT editor

gistfile1.js

// Clickable utilities in the XSLT editor
$('#utilities li').click(function(event) {
	if ($(event.target).is('a')) return;

	var editor = $('textarea.code'),
		lines = editor.val().split('\n'),
		statement = '<xsl:import href="../utilities/' + $(this).find('a').text() + '"/>',
		regexp = '^' + statement.replace('/>', '').replace('../utilities/', '(?:\.\./utilities/)?'),
		newLine = '\n',
		numberOfNewLines = 1,
		i;

	if ($(this).hasClass('selected')) {
		for (i = 0; i < lines.length; i++) {
			if ($.trim(lines[i]).match(regexp) != null) {
				(lines[i + 1] === '' && $.trim(lines[i - 1]).substring(0, 11) !== '<xsl:import') ? lines.splice(i, 2) : lines.splice(i, 1);
				break;
			}
		}

		editor.val(lines.join(newLine));
		$(this).removeClass('selected');
	}
	else {
		for (i = 0; i < lines.length; i++) {
			if ($.trim(lines[i]).substring(0, 4) === '<!--' || $.trim(lines[i]).match('^<xsl:(?:import|variable|output|comment|template)')) {
				
				numberOfNewLines = $.trim(lines[i]).substring(0, 11) === '<xsl:import' ? 1 : 2;
				
				if (($('form:first').attr('action').indexOf('blueprints/pages') == -1)) {
					// we are inside the page template editor
					lines[i] = statement.replace('../utilities/', '') + Array(numberOfNewLines + 1).join(newLine) + lines[i];
				}
				else {
					lines[i] = statement + Array(numberOfNewLines + 1).join(newLine) + lines[i];
				}
				break;
			}
		}

		editor.val(lines.join(newLine));
		$(this).addClass('selected');
	}
});