polymer-overlay: refactor (no animations yet)

Author: Yvonne Yip

polymer-overlay/index.html

@@ -5,7 +5,7 @@
 		<link rel="import" href="polymer-overlay.html">
 		<script src="../../polymer/polymer.js"></script>
 		<style>
-			polymer-overlay {
+			.dialog {
 				box-sizing: border-box;
 				-moz-box-sizing: border-box;
 				font-family: Arial, Helvetica, sans-serif;
@@ -49,35 +49,51 @@
 		<label>scrim: <input type="checkbox" onchange="scrimChange(event)"></label>
 		)
 		<br>
-		<polymer-overlay id="dialog" class="polymer-overlay-scale-slideup">
+		<div id="dialog" class="dialog polymer-overlay-scale-slideup">
+			<polymer-overlay></polymer-overlay>
 			<h2>Dialog</h2>
 			<div>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed fringilla sapien sed enim sollicitudin laoreet. Suspendisse suscipit, metus ac volutpat sodales, libero magna semper lacus, molestie fringilla massa orci ut arcu. Nullam sodales urna sit amet odio vehicula mattis.</div><br><br>
 			<div>Ut aliquam vulputate congue. Vestibulum pretium pretium nulla quis sollicitudin. Praesent lacinia congue erat nec mattis. Fusce commodo lacus est. Duis turpis eros, ultrices sed aliquet non, blandit egestas velit. Integer a augue nec lorem tristique hendrerit. Curabitur imperdiet risus id enim bibendum vestibulum. Integer id magna at arcu faucibus fermentum vel a augue. Sed fringilla venenatis dolor, in blandit magna molestie luctus. Vestibulum dignissim posuere ultrices. Aenean urna nisl, tincidunt vitae iaculis ut, pharetra nec eros.</div><br><br>
 			<div>
 				<input placeholder="say something..." autofocus oninput="somethingCheck()"></input><br>
 				I agree with this wholeheartedly.
-				<polymer-overlay id="confirmation">
+				<div id="confirmation" class="dialog">
+					<polymer-overlay></polymer-overlay>
 					Thank you.
-				</polymer-overlay>
+				</div>
 			</div><br><br>
 			<button overlay-toggle>OK</button>
-		</polymer-overlay>
+		</div>
 
 		<br><br>
 
 		<button overlay="#dialog2">Toggle Dialog 2</button>
 
-		<polymer-overlay id="dialog2" class="polymer-overlay-shake" autoCloseDisabled="true">
-			<h2>Dialog 2</h2>
-				I'm dizzy.
-			</div><br><br>
+		<div id="dialog2" class="dialog polymer-overlay-shake" autoCloseDisabled="true">
+			<polymer-overlay></polymer-overlay>
+			<div>
+				<h2>Dialog 2</h2>
+					I'm dizzy.
+			</div>
+			<br><br>
 			<button overlay-toggle>OK</button>
-		</polymer-overlay>
+		</div>
 		<script>
+			setupOverlays = function() {
+				var overlays = document.querySelectorAll('polymer-overlay');
+				Array.prototype.forEach.call(overlays, function(o) {
+					o.target = o.parentNode;
+				});
+			}
+
+			document.addEventListener('WebComponentsReady', function() {
+				setupOverlays();
+			});
+
 			$ = document.querySelector.bind(document);
 
 			somethingCheck = function() {
-				$('#confirmation').opened = (event.target.value == 'something');
+				$('#confirmation').querySelector('polymer-overlay').opened = (event.target.value == 'something');
 			}
 
 			changeOpening = function(e) {
@@ -101,7 +117,7 @@ <h2>Dialog 2</h2>
 				b.addEventListener('tap', function(e) {
 					var overlay = document.querySelector(e.target.getAttribute('overlay'));
 					if (overlay) {
-						overlay.toggle();
+						overlay.querySelector('polymer-overlay').toggle();
 					}
 				})
 			});

polymer-overlay/polymer-overlay-global.css

@@ -4,6 +4,44 @@
  * license that can be found in the LICENSE file.
  */
 
+.polymer-overlay {
+	position: fixed;
+	z-index: 10;
+	outline: none;
+	display: none;
+	opacity: 0.99;
+	-webkit-transition: opacity 0.001s;
+	transition: opacity 0.001s;
+}
+
+/*
+	The revealed class exists because it's necessary to 'show' a node
+	before applying a transition. When an overlay is opened, it is 
+	immediately revealed (display: block) and then asynchronously the 
+	opened or closing classes are added.
+
+	Because we don't want to actually show the node before a transition
+	or animation is applied, when the node is 
+	revealed, it is made display: block but visibility: hidden.
+	It is then made visibility: visible when it is opened.
+*/
+
+.polymer-overlay.revealed {
+	display: block;
+	visibility: hidden;
+}
+
+.polymer-overlay.revealed.opened {
+	opacity: 1;
+	display: block;
+	visibility: visible;
+}
+
+.polymer-overlay.revealed.closing {
+	display: block;
+	visibility: visible;
+}
+
 @-webkit-keyframes polymer-overlay-shakeFadeIn {
   0% {
     opacity: 0;