var emoji = {
	binary_store: {},

	convert: function(str, raw) {
		var ret = [], img;
		for (var i = 0, c; c = str.charCodeAt(i); i++) {
			if (
				0xE63E <= c && c <= 0xE6A5 ||
				0xE6AC <= c && c <= 0xE6AE ||
				0xE6B1 <= c && c <= 0xE6B3 ||
				0xE6B7 <= c && c <= 0xE6BA ||
				0xE6CE <= c && c <= 0xE70B ||
				0xE70C <= c && c <= 0xE757
			) {
				emoji.binary_store[c] = str.charAt(i);
				img = '<img src="/images/emoji/'+c+'.gif" alt="" width="12" height="12" class="emoji-'+c+'"/>';
				if ($.browser.msie && !raw)
					img = ['<wbr/>', img, '<wbr/>'].join(''); // [IE] wbr
				ret.push(img);
			}
			else
				ret.push(str.charAt(i));
		}
		return ret.join('');
	}
};

var EmojiTextarea = function() {};

EmojiTextarea.prototype = {
	container: null,

	appendTo: function(selector, str, attrs) {
		this.container = $('<div class="emoji-textarea textbox"/>')
			.attr($.extend(attrs, {
				contentEditable: true
			}, attrs))
			.appendTo(selector)
			.html(emoji.convert(str, true));

		return this.container;
	},

	val: function() {
		if (!this.container) return '';
		var str = this.container.clone();
		$('img', str).each(function() {
			var img = $(this);
			if (/emoji-(\d+)/.test(img.attr('class')))
				img.replaceWith(emoji.binary_store[RegExp.$1]);
		});
		return str.text();
	}
};