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

   1 <!--
   2 Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
   3 This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
   4 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
   5 The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
   6 Code distributed by Google as part of the polymer project is also
   7 subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
   8 -->
   9 <link rel="import" href="../polymer/polymer.html">
  10
  11 <polymer-element name="core-overlay-layer">
  12 <template>
  13   <style>
  14     :host {
  15       position: fixed;
  16       top: 0;
  17       left: 0;
  18       z-index: 1000;
  19       display: none;
  20     }
  21
  22     :host(.core-opened) {
  23       display: block;
  24     }
  25   </style>
  26   <content></content>
  27 </template>
  28 <script>
  29 (function() {
  30
  31   Polymer('core-overlay-layer', {
  32     publish: {
  33       opened: false
  34     },
  35     openedChanged: function() {
  36       this.classList.toggle('core-opened', this.opened);
  37     },
  38     /**
  39      * Adds an element to the overlay layer
  40      */
  41     addElement: function(element) {
  42       if (!this.parentNode) {
  43         document.querySelector('body').appendChild(this);
  44       }
  45       if (element.parentNode !== this) {
  46         element.__contents = [];
  47         var ip$ = element.querySelectorAll('content');
  48         for (var i=0, l=ip$.length, n; (i<l) && (n = ip$[i]); i++) {
  49           this.moveInsertedElements(n);
  50           this.cacheDomLocation(n);
  51           n.parentNode.removeChild(n);
  52           element.__contents.push(n);
  53         }
  54         this.cacheDomLocation(element);
  55         this.updateEventController(element);
  56         var h = this.makeHost();
  57         h.shadowRoot.appendChild(element);
  58         element.__host = h;
  59       }
  60     },
  61     makeHost: function() {
  62       var h = document.createElement('overlay-host');
  63       h.createShadowRoot();
  64       this.appendChild(h);
  65       return h;
  66     },
  67     moveInsertedElements: function(insertionPoint) {
  68       var n$ = insertionPoint.getDistributedNodes();
  69       var parent = insertionPoint.parentNode;
  70       insertionPoint.__contents = [];
  71       for (var i=0, l=n$.length, n; (i<l) && (n=n$[i]); i++) {
  72         this.cacheDomLocation(n);
  73         this.updateEventController(n);
  74         insertionPoint.__contents.push(n);
  75         parent.appendChild(n);
  76       }
  77     },
  78     updateEventController: function(element) {
  79       element.eventController = this.element.findController(element);
  80     },
  81     /**
  82      * Removes an element from the overlay layer
  83      */
  84     removeElement: function(element) {
  85       element.eventController = null;
  86       this.replaceElement(element);
  87       var h = element.__host;
  88       if (h) {
  89         h.parentNode.removeChild(h);
  90       }
  91     },
  92     replaceElement: function(element) {
  93       if (element.__contents) {
  94         for (var i=0, c$=element.__contents, c; (c=c$[i]); i++) {
  95           this.replaceElement(c);
  96         }
  97         element.__contents = null;
  98       }
  99       if (element.__parentNode) {
 100         var n = element.__nextElementSibling && element.__nextElementSibling
 101             === element.__parentNode ? element.__nextElementSibling : null;
 102         element.__parentNode.insertBefore(element, n);
 103       }
 104     },
 105     cacheDomLocation: function(element) {
 106       element.__nextElementSibling = element.nextElementSibling;
 107       element.__parentNode = element.parentNode;
 108     }
 109   });
 110
 111 })();
 112 </script>
 113 </polymer-element>