(function($, document) {
	$(function() {
		if (!$.os.ios) {
			return;
		}
		var CLASS_FOCUSIN = $.className('focusin');
		var CLASS_BAR_TAB = $.className('bar-tab');
		var CLASS_BAR_FOOTER = $.className('bar-footer');
		var CLASS_BAR_FOOTER_SECONDARY = $.className('bar-footer-secondary');
		var CLASS_BAR_FOOTER_SECONDARY_TAB = $.className('bar-footer-secondary-tab');
		// var content = document.querySelector('.' + CLASS_CONTENT);
		// if (content) {
		// 	document.body.insertBefore(content, document.body.firstElementChild);
		// }
		document.addEventListener('focusin', function(e) {
			if ($.os.plus) { //在父webview里边不fix
				if (window.plus) {
					if (plus.webview.currentWebview().children().length > 0) {
						return;
					}
				}
			}
			var target = e.target;
			//TODO 需考虑所有键盘弹起的情况
			if (target.tagName && (target.tagName === 'TEXTAREA' || (target.tagName === 'INPUT' && (target.type === 'text' || target.type === 'search' || target.type === 'number')))) {
				if (target.disabled || target.readOnly) {
					return;
				}
				document.body.classList.add(CLASS_FOCUSIN);
				var isFooter = false;
				for (; target && target !== document; target = target.parentNode) {
					var classList = target.classList;
					if (classList && classList.contains(CLASS_BAR_TAB) || classList.contains(CLASS_BAR_FOOTER) || classList.contains(CLASS_BAR_FOOTER_SECONDARY) || classList.contains(CLASS_BAR_FOOTER_SECONDARY_TAB)) {
						isFooter = true;
						break;
					}
				}
				if (isFooter) {
					var scrollTop = document.body.scrollHeight;
					var scrollLeft = document.body.scrollLeft;
					setTimeout(function() {
						window.scrollTo(scrollLeft, scrollTop);
					}, 20);
				}
			}
		});
		document.addEventListener('focusout', function(e) {
			var classList = document.body.classList;
			if (classList.contains(CLASS_FOCUSIN)) {
				classList.remove(CLASS_FOCUSIN);
				setTimeout(function() {
					window.scrollTo(document.body.scrollLeft, document.body.scrollTop);
				}, 20);
			}
		});
	});
})(WUI, document);