Polymer elements added to third_party/polymer.

third_party/polymer/components/core-overlay/core-overlay-layer.html

+<!--
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<polymer-element name="core-overlay-layer">
+<template>
+  <style>
+    :host {
+      position: fixed;
+      top: 0;
+      left: 0;
+      z-index: 1000;
+      display: none;
+    }
+
+    :host(.core-opened) {
+      display: block;
+    }
+  </style>
+  <content></content>
+</template>
+<script>
+(function() {
+
+  Polymer('core-overlay-layer', {
+    publish: {
+      opened: false
+    },
+    openedChanged: function() {
+      this.classList.toggle('core-opened', this.opened);
+    },
+    /**
+     * Adds an element to the overlay layer
+     */
+    addElement: function(element) {
+      if (!this.parentNode) {
+        document.querySelector('body').appendChild(this);
+      }
+      if (element.parentNode !== this) {
+        element.__contents = [];
+        var ip$ = element.querySelectorAll('content');
+        for (var i=0, l=ip$.length, n; (i<l) && (n = ip$[i]); i++) {
+          this.moveInsertedElements(n);
+          this.cacheDomLocation(n);
+          n.parentNode.removeChild(n);
+          element.__contents.push(n);
+        }
+        this.cacheDomLocation(element);
+        this.updateEventController(element);
+        var h = this.makeHost();
+        h.shadowRoot.appendChild(element);
+        element.__host = h;
+      }
+    },
+    makeHost: function() {
+      var h = document.createElement('overlay-host');
+      h.createShadowRoot();
+      this.appendChild(h);
+      return h;
+    },
+    moveInsertedElements: function(insertionPoint) {
+      var n$ = insertionPoint.getDistributedNodes();
+      var parent = insertionPoint.parentNode;
+      insertionPoint.__contents = [];
+      for (var i=0, l=n$.length, n; (i<l) && (n=n$[i]); i++) {
+        this.cacheDomLocation(n);
+        this.updateEventController(n);
+        insertionPoint.__contents.push(n);
+        parent.appendChild(n);  
+      }
+    },
+    updateEventController: function(element) {
+      element.eventController = this.element.findController(element);
+    },
+    /**
+     * Removes an element from the overlay layer
+     */
+    removeElement: function(element) {
+      element.eventController = null;
+      this.replaceElement(element);
+      var h = element.__host;
+      if (h) {
+        h.parentNode.removeChild(h);
+      }
+    },
+    replaceElement: function(element) {
+      if (element.__contents) {
+        for (var i=0, c$=element.__contents, c; (c=c$[i]); i++) {
+          this.replaceElement(c);
+        }
+        element.__contents = null;
+      }
+      if (element.__parentNode) {
+        var n = element.__nextElementSibling && element.__nextElementSibling 
+            === element.__parentNode ? element.__nextElementSibling : null;
+        element.__parentNode.insertBefore(element, n);
+      }
+    },
+    cacheDomLocation: function(element) {
+      element.__nextElementSibling = element.nextElementSibling;
+      element.__parentNode = element.parentNode;
+    }
+  });
+  
+})();
+</script>
+</polymer-element>