Import Polymer 0.8 and several key elements.

third_party/polymer/v0_8/components/paper-drawer-panel/paper-drawer-panel.html

Index: third_party/polymer/v0_8/components/paper-drawer-panel/paper-drawer-panel.html
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+<!--
+Copyright (c) 2015 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
+-->
+
+<link rel="import" href="../polymer/polymer.html">
+<link rel="import" href="../iron-media-query/iron-media-query.html">
+<link rel="import" href="../iron-selector/iron-selector.html">
+
+<!--
+`paper-drawer-panel` contains a drawer panel and a main panel.  The drawer
+and the main panel are side-by-side with drawer on the left.  When the browser
+window size is smaller than the `responsiveWidth`, `paper-drawer-panel`
+changes to narrow layout.  In narrow layout, the drawer will be stacked on top
+of the main panel.  The drawer will slide in/out to hide/reveal the main
+panel.
+
+Use the attribute `drawer` to indicate that the element is the drawer panel and
+`main` to indicate that the element is the main panel.
+
+Example:
+
+    <paper-drawer-panel>
+      <div drawer> Drawer panel... </div>
+      <div main> Main panel... </div>
+    </paper-drawer-panel>
+
+The drawer and the main panels are not scrollable.  You can set CSS overflow
+property on the elements to make them scrollable or use `paper-header-panel`.
+
+Example:
+
+    <paper-drawer-panel>
+      <paper-header-panel drawer>
+        <paper-toolbar></paper-toolbar>
+        <div> Drawer content... </div>
+      </paper-header-panel>
+      <paper-header-panel main>
+        <paper-toolbar></paper-toolbar>
+        <div> Main content... </div>
+      </paper-header-panel>
+    </paper-drawer-panel>
+
+An element that should toggle the drawer will automatically do so if it's
+given the `paper-drawer-toggle` attribute.  Also this element will automatically
+be hidden in wide layout.
+
+Example:
+
+    <paper-drawer-panel>
+      <paper-header-panel drawer>
+        <paper-toolbar>
+          <div>Application</div>
+        </paper-toolbar>
+        <div> Drawer content... </div>
+      </paper-header-panel>
+      <paper-header-panel main>
+        <paper-toolbar>
+          <paper-icon-button icon="menu" paper-drawer-toggle></paper-icon-button>
+          <div>Title</div>
+        </paper-toolbar>
+        <div> Main content... </div>
+      </paper-header-panel>
+    </paper-drawer-panel>
+
+To position the drawer to the right, add `rightDrawer` attribute.
+
+    <paper-drawer-panel rightDrawer>
+      <div drawer> Drawer panel... </div>
+      <div main> Main panel... </div>
+    </paper-drawer-panel>
+
+@group Polymer Elements
+@element paper-drawer-panel
+@homepage github.io
+-->
+
+<dom-module id="paper-drawer-panel">
+
+  <style>
+    :host {
+      display: block;
+      position: absolute;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      overflow: hidden;
+    }
+
+    iron-selector > #drawer {
+      position: absolute;
+      top: 0;
+      left: 0;
+      height: 100%;
+      will-change: transform;
+      box-sizing: border-box;
+      -moz-box-sizing: border-box;
+    }
+
+    .transition > #drawer {
+      transition: -webkit-transform ease-in-out 0.3s, width ease-in-out 0.3s;
+      transition: transform ease-in-out 0.3s, width ease-in-out 0.3s;
+    }
+
+    /*
+    right-drawer: make drawer on the right side
+    */
+    .right-drawer > #drawer {
+      left: auto;
+      right: 0;
+    }
+
+    paper-drawer-panel #drawer > * {
+      position: absolute;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      box-sizing: border-box;
+      -moz-box-sizing: border-box;
+    }
+
+    iron-selector > #main {
+      position: absolute;
+      top: 0;
+      right: 0;
+      bottom: 0;
+    }
+
+    .transition > #main {
+      transition: left ease-in-out 0.3s, padding ease-in-out 0.3s;
+    }
+
+    .right-drawer > #main {
+      left: 0;
+    }
+
+    .right-drawer.transition > #main {
+      transition: right ease-in-out 0.3s, padding ease-in-out 0.3s;
+    }
+
+    #main > [main] {
+      height: 100%;
+    }
+
+    #scrim {
+      position: absolute;
+      top: 0;
+      right: 0;
+      bottom: 0;
+      left: 0;
+      background-color: rgba(0, 0, 0, 0.3);
+      visibility: hidden;
+      opacity: 0;
+      transition: opacity ease-in-out 0.38s, visibility ease-in-out 0.38s;
+    }
+
+    #edgeSwipeOverlay {
+      position: absolute;
+      top: 0;
+      bottom: 0;
+      left: 0;
+      width: 20px;
+    }
+
+    .right-drawer > #main > #edgeSwipeOverlay {
+      right: 0;
+      left: auto;
+    }
+
+    /*
+    narrow layout
+    */
+    .narrow-layout > #drawer.iron-selected {
+      box-shadow: 2px 2px 4px rgba(0, 0, 0, 0.15);
+    }
+
+    .right-drawer.narrow-layout > #drawer.iron-selected {
+      box-shadow: -2px 2px 4px rgba(0, 0, 0, 0.15);
+    }
+
+    .narrow-layout > #drawer > ::content[select="[drawer]"] > * {
+      border: 0;
+    }
+
+    .narrow-layout > #drawer:not(.iron-selected) {
+      -webkit-transform: translateX(-100%);
+      transform: translateX(-100%);
+    }
+
+    .right-drawer.narrow-layout > #drawer:not(.iron-selected) {
+      left: auto;
+      -webkit-transform: translateX(100%);
+      transform: translateX(100%);
+    }
+
+    .narrow-layout > #main {
+      left: 0 !important;
+      padding: 0;
+    }
+
+    .right-drawer.narrow-layout > #main {
+      left: 0;
+      right: 0;
+      padding: 0;
+    }
+
+    .narrow-layout > #main:not(.iron-selected) > #scrim,
+    .dragging #scrim {
+      visibility: visible;
+      opacity: 1;
+    }
+
+    .narrow-layout > #main > * {
+      margin: 0;
+      min-height: 100%;
+      left: 0;
+      right: 0;
+      box-sizing: border-box;
+      -moz-box-sizing: border-box;
+    }
+
+    iron-selector:not(.narrow-layout) #main ::content [paper-drawer-toggle] {
+      display: none;
+    }
+  </style>
+
+  <template>
+    <iron-media-query
+        on-query-matches-changed="onQueryMatchesChanged"
+        query="[[_computeMediaQuery(forceNarrow, responsiveWidth)]]">
+    </iron-media-query>
+
+    <iron-selector
+        attr-for-selected="id"
+        class$="[[_computeIronSelectorClass(narrow, transition, dragging, rightDrawer)]]"
+        on-iron-activate="onSelect"
+        selected="[[selected]]">
+
+      <div id="main" style$="[[_computeMainStyle(narrow, rightDrawer, drawerWidth)]]">
+        <content select="[main]"></content>
+        <div id="scrim"></div>
+        <div id="edgeSwipeOverlay"
+            hidden$="[[_computeSwipeOverlayHidden(narrow, disableEdgeSwipe)]]">
+        </div>
+      </div>
+
+      <div id="drawer" style$="[[_computeDrawerStyle(drawerWidth)]]">
+        <content select="[drawer]"></content>
+      </div>
+
+    </iron-selector>
+  </template>
+
+</dom-module>
+
+<script>
+
+  (function() {
+
+    'use strict';
+
+    function classNames(obj) {
+      var classNames = [];
+      for (var key in obj) {
+        if (obj.hasOwnProperty(key) && obj[key]) {
+          classNames.push(key);
+        }
+      }
+
+      return classNames.join(' ');
+    }
+
+    Polymer({
+
+      is: 'paper-drawer-panel',
+
+      /**
+       * Fired when the narrow layout changes.
+       *
+       * @event paper-responsive-change
+       * @param {Object} detail
+       * @param {boolean} detail.narrow true if the panel is in narrow layout.
+       */
+
+      /**
+       * Fired when the selected panel changes.
+       *
+       * Listening for this event is an alternative to observing changes in the `selected` attribute.
+       * This event is fired both when a panel is selected and deselected.
+       * The `isSelected` detail property contains the selection state.
+       *
+       * @event paper-select
+       * @param {Object} detail
+       * @param {boolean} detail.isSelected true for selection and false for deselection
+       * @param {Object} detail.item the panel that the event refers to
+       */
+
+      properties: {
+
+        /**
+         * The panel to be selected when `paper-drawer-panel` changes to narrow
+         * layout.
+         *
+         * @attribute defaultSelected
+         * @type string
+         * @default 'main'
+         */
+        defaultSelected: {
+          type: String,
+          value: 'main'
+        },
+
+        /**
+         * If true, swipe from the edge is disable.
+         *
+         * @attribute disableEdgeSwipe
+         * @type boolean
+         * @default false
+         */
+        disableEdgeSwipe: Boolean,
+
+        /**
+         * If true, swipe to open/close the drawer is disabled.
+         *
+         * @attribute disableSwipe
+         * @type boolean
+         * @default false
+         */
+        disableSwipe: Boolean,
+
+        // Whether the user is dragging the drawer interactively.
+        dragging: {
+          value: false
+        },
+
+        /**
+         * Width of the drawer panel.
+         *
+         * @attribute drawerWidth
+         * @type string
+         * @default '256px'
+         */
+        drawerWidth: {
+          type: String,
+          value: '256px'
+        },
+
+        // How many pixels on the side of the screen are sensitive to edge
+        // swipes and peek.
+        edgeSwipeSensitivity: {
+          value: 30
+        },
+
+        /**
+         * If true, ignore `responsiveWidth` setting and force the narrow layout.
+         *
+         * @attribute forceNarrow
+         * @type boolean
+         * @default false
+         */
+        forceNarrow: {
+          observer: 'forceNarrowChanged',
+          type: Boolean,
+          value: false
+        },
+
+        // Whether the browser has support for the transform CSS property.
+        hasTransform: {
+          value: function() {
+            return 'transform' in this.style;
+          }
+        },
+
+        // Whether the browser has support for the will-change CSS property.
+        hasWillChange: {
+          value: function() {
+            return 'willChange' in this.style;
+          }
+        },
+
+        /**
+         * Returns true if the panel is in narrow layout.  This is useful if you
+         * need to show/hide elements based on the layout.
+         *
+         * @attribute narrow
+         * @type boolean
+         * @default false
+         */
+        narrow: {
+          reflectToAttribute: true,
+          type: Boolean,
+          value: false
+        },
+
+        // Whether the drawer is peeking out from the edge.
+        peeking: false,
+
+        /**
+         * Max-width when the panel changes to narrow layout.
+         *
+         * @attribute responsiveWidth
+         * @type string
+         * @default '640px'
+         */
+        responsiveWidth: {
+          type: String,
+          value: '640px'
+        },
+
+        /**
+         * If true, position the drawer to the right.
+         *
+         * @attribute rightDrawer
+         * @type boolean
+         * @default false
+         */
+        rightDrawer: {
+          type: Boolean,
+          value: false
+        },
+
+        /**
+         * The panel that is being selected. `drawer` for the drawer panel and
+         * `main` for the main panel.
+         *
+         * @attribute selected
+         * @type string
+         * @default null
+         */
+        selected: {
+          reflectToAttribute: true,
+          type: String,
+          value: null
+        },
+
+        /**
+         * The attribute on elements that should toggle the drawer on tap, also elements will
+         * automatically be hidden in wide layout.
+         */
+        drawerToggleAttribute: {
+          value: 'paper-drawer-toggle'
+        },
+
+        /**
+         * Whether the transition is enabled.
+         */
+        transition: false,
+
+        /**
+         * Starting X coordinate of a tracking gesture. It is non-null only between trackStart and
+         * trackEnd events.
+         */
+        _startX: {
+          value: null
+        }
+
+      },
+
+      listeners: {
+        click: 'onClick',
+        track: 'onTrack'
+
+        // TODO: Implement tap handlers when taps are supported.
+        //
+        // down: 'downHandler',
+        // up: 'upHandler'
+      },
+
+      _computeIronSelectorClass: function(narrow, transition, dragging, rightDrawer) {
+        return classNames({
+          dragging: dragging,
+          'narrow-layout': narrow,
+          'right-drawer': rightDrawer,
+          transition: transition
+        });
+      },
+
+      _computeDrawerStyle: function(drawerWidth) {
+        return 'width:' + drawerWidth + ';';
+      },
+
+      _computeMainStyle: function(narrow, rightDrawer, drawerWidth) {
+        var style = '';
+
+        style += 'left:' + ((narrow || rightDrawer) ? '0' : drawerWidth) + ';'
+
+        if (rightDrawer) {
+          style += 'right:' + (narrow ? '' : drawerWidth) + ';';
+        } else {
+          style += 'right:;'
+        }
+
+        return style;
+      },
+
+      _computeMediaQuery: function(forceNarrow, responsiveWidth) {
+        return forceNarrow ? '' : '(max-width: ' + responsiveWidth + ')';
+      },
+
+      _computeSwipeOverlayHidden: function(narrow, disableEdgeSwipe) {
+        return !narrow || disableEdgeSwipe;
+      },
+
+      onTrack: function(event) {
+        switch (event.detail.state) {
+          case 'end':
+            this.trackEnd(event);
+            break;
+          case 'move':
+            this.trackX(event);
+            break;
+          case 'start':
+            this.trackStart(event);
+            break;
+        }
+      },
+
+      ready: function() {
+        // Avoid transition at the beginning e.g. page loads and enable
+        // transitions only after the element is rendered and ready.
+        this.transition = true;
+      },
+
+      /**
+       * Toggles the panel open and closed.
+       *
+       * @method togglePanel
+       */
+      togglePanel: function() {
+        if (this.isMainSelected()) {
+          this.openDrawer();
+        } else {
+          this.closeDrawer();
+        }
+      },
+
+      /**
+       * Opens the drawer.
+       *
+       * @method openDrawer
+       */
+      openDrawer: function() {
+        this.selected = 'drawer';
+      },
+
+      /**
+       * Closes the drawer.
+       *
+       * @method closeDrawer
+       */
+      closeDrawer: function() {
+        this.selected = 'main';
+      },
+
+      _responsiveChange: function(narrow) {
+        this.narrow = narrow;
+
+        if (this.narrow) {
+          this.selected = this.defaultSelected;
+        }
+
+        this.setAttribute('touch-action', this.swipeAllowed() ? 'pan-y' : '');
+        this.fire('paper-responsive-change', {narrow: this.narrow});
+      },
+
+      onQueryMatchesChanged: function(e) {
+        this._responsiveChange(e.detail.value);
+      },
+
+      forceNarrowChanged: function() {
+        this._responsiveChange(this.forceNarrow);
+      },
+
+      swipeAllowed: function() {
+        return this.narrow && !this.disableSwipe;
+      },
+
+      isMainSelected: function() {
+        return this.selected === 'main';
+      },
+
+      startEdgePeek: function() {
+        this.width = this.$.drawer.offsetWidth;
+        this.moveDrawer(this.translateXForDeltaX(this.rightDrawer ?
+            -this.edgeSwipeSensitivity : this.edgeSwipeSensitivity));
+        this.peeking = true;
+      },
+
+      stopEdgePeek: function() {
+        if (this.peeking) {
+          this.peeking = false;
+          this.moveDrawer(null);
+        }
+      },
+
+      // TODO: Implement tap handlers when taps are supported.
+      //
+      // downHandler: function(e) {
+      //   if (!this.dragging && this.isMainSelected() && this.isEdgeTouch(e)) {
+      //     this.startEdgePeek();
+      //   }
+      // },
+      //
+      // upHandler: function(e) {
+      //   this.stopEdgePeek();
+      // },
+
+      onClick: function(e) {
+        var isTargetToggleElement = e.target &&
+          this.drawerToggleAttribute &&
+          e.target.hasAttribute(this.drawerToggleAttribute);
+
+        if (isTargetToggleElement) {
+          this.togglePanel();
+        }
+      },
+
+      isEdgeTouch: function(event) {
+        var x = event.detail.x;
+
+        return !this.disableEdgeSwipe && this.swipeAllowed() &&
+          (this.rightDrawer ?
+            x >= this.offsetWidth - this.edgeSwipeSensitivity :
+            x <= this.edgeSwipeSensitivity);
+      },
+
+      trackStart: function(event) {
+        if (this.swipeAllowed()) {
+          this.dragging = true;
+          this._startX = event.detail.x;
+
+          if (this.isMainSelected()) {
+            this.dragging = this.peeking || this.isEdgeTouch(event);
+          }
+
+          if (this.dragging) {
+            this.width = this.$.drawer.offsetWidth;
+            this.transition = false;
+
+            // TODO: Re-enable when tap gestures are implemented.
+            //
+            // e.preventTap();
+          }
+        }
+      },
+
+      translateXForDeltaX: function(deltaX) {
+        var isMain = this.isMainSelected();
+
+        if (this.rightDrawer) {
+          return Math.max(0, isMain ? this.width + deltaX : deltaX);
+        } else {
+          return Math.min(0, isMain ? deltaX - this.width : deltaX);
+        }
+      },
+
+      trackX: function(event) {
+        var dx = event.detail.x - this._startX;
+
+        if (this.dragging) {
+          if (this.peeking) {
+            if (Math.abs(dx) <= this.edgeSwipeSensitivity) {
+              // Ignore trackx until we move past the edge peek.
+              return;
+            }
+
+            this.peeking = false;
+          }
+
+          this.moveDrawer(this.translateXForDeltaX(dx));
+        }
+      },
+
+      trackEnd: function(event) {
+        if (this.dragging) {
+          var xDirection = (event.detail.x - this._startX) > 0;
+
+          this.dragging = false;
+          this._startX = null;
+          this.transition = true;
+          this.moveDrawer(null);
+
+          if (this.rightDrawer) {
+            this[(xDirection > 0) ? 'closeDrawer' : 'openDrawer']();
+          } else {
+            this[(xDirection > 0) ? 'openDrawer' : 'closeDrawer']();
+          }
+        }
+      },
+
+      transformForTranslateX: function(translateX) {
+        if (translateX === null) {
+          return '';
+        }
+
+        return this.hasWillChange ? 'translateX(' + translateX + 'px)' :
+            'translate3d(' + translateX + 'px, 0, 0)';
+      },
+
+      moveDrawer: function(translateX) {
+        var s = this.$.drawer.style;
+
+        if (this.hasTransform) {
+          s.transform = this.transformForTranslateX(translateX);
+        } else {
+          s.webkitTransform = this.transformForTranslateX(translateX);
+        }
+      },
+
+      onSelect: function(e) {
+        e.preventDefault();
+        this.selected = e.detail.selected;
+      }
+
+    });
+
+  }());
+
+</script>