Upgrade Observatory to Polymer 0.10.x

runtime/bin/vmservice/client/deployed/web/packages/web_components/platform.concat.js.map

 {
   "version": 3,
   "file": "platform.concat.js",
   "sources": [
     "../WeakMap/weakmap.js",
     "../observe-js/src/observe.js",
     "build/if-poly.js",
     "../ShadowDOM/src/wrappers.js",
     "../ShadowDOM/src/microtask.js",
     "../ShadowDOM/src/MutationObserver.js",
@@ skipping 190 matching lines @@
     "/*\n * Copyright 2013 The Polymer Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/*\n * Basic strategy: find the farthest apart points, use as diameter of circle\n * react to size change and rotation of the chord\n */\n\n/**\n * @module PointerGestures\n * @submodule Events\n * @class pinch\n */\n/**\n * Scale of the pinch zoom gesture\n * @property scale\n * @type Number\n */\n/**\n * Center X position of pointers causing pinch\n * @property centerX\n * @type Number\n */\n/**\n * Center Y position of pointers causing pinch\n * @property centerY\n * @type Number\n */\n\n/**\n * @module PointerGestures\n * @submodule Events\n * @class rotate\n */\n/**\n * Angle (in degrees) of rotation. Measured from starting positions of pointers.\n * @property angle\n * @type Number\n */\n/**\n * Center X position of pointers causing rotation\n * @property centerX\n * @type Number\n */\n/**\n * Center Y position of pointers causing rotation\n * @property centerY\n * @type Number\n */\n(function(scope) {\n  var dispatcher = scope.dispatcher;\n  var pointermap = new scope.PointerMap();\n  var RAD_TO_DEG = 180 / Math.PI;\n  var pinch = {\n    events: [\n      'pointerdown',\n      'pointermove',\n      'pointerup',\n      'pointercancel'\n    ],\n    reference: {},\n    pointerdown: function(ev) {\n      pointermap.set(ev.pointerId, ev);\n      if (pointermap.pointers() == 2) {\n        var points = this.calcChord();\n        var angle = this.calcAngle(points);\n        this.reference = {\n          angle: angle,\n          diameter: points.diameter,\n          target: scope.findLCA(points.a.target, points.b.target)\n        };\n      }\n    },\n    pointerup: function(ev) {\n      pointermap.delete(ev.pointerId);\n    },\n    pointermove: function(ev) {\n      if (pointermap.has(ev.pointerId)) {\n        pointermap.set(ev.pointerId, ev);\n        if (pointermap.pointers() > 1) {\n          this.calcPinchRotate();\n        }\n      }\n    },\n    pointercancel: function(ev) {\n      this.pointerup(ev);\n    },\n    dispatchPinch: function(diameter, points) {\n      var zoom = diameter / this.reference.diameter;\n      var ev = dispatcher.makeEvent('pinch', {\n        scale: zoom,\n        centerX: points.center.x,\n        centerY: points.center.y\n      });\n      dispatcher.dispatchEvent(ev, this.reference.target);\n    },\n    dispatchRotate: function(angle, points) {\n      var diff = Math.round((angle - this.reference.angle) % 360);\n      var ev = dispatcher.makeEvent('rotate', {\n        angle: diff,\n        centerX: points.center.x,\n        centerY: points.center.y\n      });\n      dispatcher.dispatchEvent(ev, this.reference.target);\n    },\n    calcPinchRotate: function() {\n      var points = this.calcChord();\n      var diameter = points.diameter;\n      var angle = this.calcAngle(points);\n      if (diameter != this.reference.diameter) {\n        this.dispatchPinch(diameter, points);\n      }\n      if (angle != this.reference.angle) {\n        this.dispatchRotate(angle, points);\n      }\n    },\n    calcChord: function() {\n      var pointers = [];\n      pointermap.forEach(function(p) {\n        pointers.push(p);\n      });\n      var dist = 0;\n      // start with at least two pointers\n      var points = {a: pointers[0], b: pointers[1]};\n      var x, y, d;\n      for (var i = 0; i < pointers.length; i++) {\n        var a = pointers[i];\n        for (var j = i + 1; j < pointers.length; j++) {\n          var b = pointers[j];\n          x = Math.abs(a.clientX - b.clientX);\n          y = Math.abs(a.clientY - b.clientY);\n          d = x + y;\n          if (d > dist) {\n            dist = d;\n            points = {a: a, b: b};\n          }\n        }\n      }\n      x = Math.abs(points.a.clientX + points.b.clientX) / 2;\n      y = Math.abs(points.a.clientY + points.b.clientY) / 2;\n      points.center = { x: x, y: y };\n      points.diameter = dist;\n      return points;\n    },\n    calcAngle: function(points) {\n      var x = points.a.clientX - points.b.clientX;\n      var y = points.a.clientY - points.b.clientY;\n      return (360 + Math.atan2(y, x) * RAD_TO_DEG) % 360;\n    },\n  };\n  dispatcher.registerRecognizer('pinch', pinch);\n})(window.PointerGestures);\n",
     "/*\n * Copyright 2013 The Polymer Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * This event is fired when a pointer quickly goes down and up, and is used to\n * denote activation.\n *\n * Any gesture event can prevent the tap event from being created by calling\n * `event.preventTap`.\n *\n * Any pointer event can prevent the tap by setting the `tapPrevented` property\n * on itself.\n *\n * @module PointerGestures\n * @submodule Events\n * @class tap\n */\n/**\n * X axis position of the tap.\n * @property x\n * @type Number\n */\n/**\n * Y axis position of the tap.\n * @property y\n * @type Number\n */\n/**\n * Type of the pointer that made the tap.\n * @property pointerType\n * @type String\n */\n(function(scope) {\n  var dispatcher = scope.dispatcher;\n  var pointermap = new scope.PointerMap();\n  var tap = {\n    events: [\n      'pointerdown',\n      'pointermove',\n      'pointerup',\n      'pointercancel',\n      'keyup'\n    ],\n    pointerdown: function(inEvent) {\n      if (inEvent.isPrimary && !inEvent.tapPrevented) {\n        pointermap.set(inEvent.pointerId, {\n          target: inEvent.target,\n          buttons: inEvent.buttons,\n          x: inEvent.clientX,\n          y: inEvent.clientY\n        });\n      }\n    },\n    pointermove: function(inEvent) {\n      if (inEvent.isPrimary) {\n        var start = pointermap.get(inEvent.pointerId);\n        if (start) {\n          if (inEvent.tapPrevented) {\n            pointermap.delete(inEvent.pointerId);\n          }\n        }\n      }\n    },\n    shouldTap: function(e, downState) {\n      if (!e.tapPrevented) {\n        if (e.pointerType === 'mouse') {\n          // only allow left click to tap for mouse\n          return downState.buttons === 1;\n        } else {\n          return true;\n        }\n      }\n    },\n    pointerup: function(inEvent) {\n      var start = pointermap.get(inEvent.pointerId);\n      if (start && this.shouldTap(inEvent, start)) {\n        var t = scope.findLCA(start.target, inEvent.target);\n        if (t) {\n          var e = dispatcher.makeEvent('tap', {\n            x: inEvent.clientX,\n            y: inEvent.clientY,\n            detail: inEvent.detail,\n            pointerType: inEvent.pointerType\n          });\n          dispatcher.dispatchEvent(e, t);\n        }\n      }\n      pointermap.delete(inEvent.pointerId);\n    },\n    pointercancel: function(inEvent) {\n      pointermap.delete(inEvent.pointerId);\n    },\n    keyup: function(inEvent) {\n      var code = inEvent.keyCode;\n      // 32 == spacebar\n      if (code === 32) {\n        var t = inEvent.target;\n        if (!(t instanceof HTMLInputElement || t instanceof HTMLTextAreaElement)) {\n          dispatcher.dispatchEvent(dispatcher.makeEvent('tap', {\n            x: 0,\n            y: 0,\n            detail: 0,\n            pointerType: 'unavailable'\n          }), t);\n        }\n      }\n    },\n    preventTap: function(inPointerId) {\n      pointermap.delete(inPointerId);\n    }\n  };\n  dispatcher.registerRecognizer('tap', tap);\n})(window.PointerGestures);\n",
     "/*\n * Copyright 2014 The Polymer Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n\n/**\n * Because recognizers are loaded after dispatcher, we have to wait to register\n * scopes until after all the recognizers.\n */\n(function(scope) {\n  var dispatcher = scope.dispatcher;\n  function registerScopes() {\n    dispatcher.immediateRegister = true;\n    var rq = dispatcher.registerQueue;\n    rq.forEach(scope.register);\n    rq.length = 0;\n  }\n  if (document.readyState === 'complete') {\n    registerScopes();\n  } else {\n    // register scopes after a steadystate is reached\n    // less MutationObserver churn\n    document.addEventListener('readystatechange', function() {\n      if (document.readyState === 'complete') {\n        registerScopes();\n      }\n    });\n  }\n})(window.PointerGestures);\n",
     "// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.\n// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt\n// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt\n// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt\n// Code distributed by Google as part of the polymer project is also\n// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt\n\n(function(global) {\n  'use strict';\n\n  var filter = Array.prototype.filter.call.bind(Array.prototype.filter);\n\n  function getTreeScope(node) {\n    while (node.parentNode) {\n      node = node.parentNode;\n    }\n\n    return typeof node.getElementById === 'function' ? node : null;\n  }\n\n  Node.prototype.bind = function(name, observable) {\n    console.error('Unhandled binding to Node: ', this, name, observable);\n  };\n\n  function updateBindings(node, name, binding) {\n    var bindings = node.bindings_;\n    if (!bindings)\n      bindings = node.bindings_ = {};\n\n    if (bindings[name])\n      binding[name].close();\n\n    return bindings[name] = binding;\n  }\n\n  function returnBinding(node, name, binding) {\n    return binding;\n  }\n\n  function sanitizeValue(value) {\n    return value == null ? '' : value;\n  }\n\n  function updateText(node, value) {\n    node.data = sanitizeValue(value);\n  }\n\n  function textBinding(node) {\n    return function(value) {\n      return updateText(node, value);\n    };\n  }\n\n  var maybeUpdateBindings = returnBinding;\n\n  Object.defineProperty(Platform, 'enableBindingsReflection', {\n    get: function() {\n      return maybeUpdateBindings === updateBindings;\n    },\n    set: function(enable) {\n      maybeUpdateBindings = enable ? updateBindings : returnBinding;\n      return enable;\n    },\n    configurable: true\n  });\n\n  Text.prototype.bind = function(name, value, oneTime) {\n    if (name !== 'textContent')\n      return Node.prototype.bind.call(this, name, value, oneTime);\n\n    if (oneTime)\n      return updateText(this, value);\n\n    var observable = value;\n    updateText(this, observable.open(textBinding(this)));\n    return maybeUpdateBindings(this, name, observable);\n  }\n\n  function updateAttribute(el, name, conditional, value) {\n    if (conditional) {\n      if (value)\n        el.setAttribute(name, '');\n      else\n        el.removeAttribute(name);\n      return;\n    }\n\n    el.setAttribute(name, sanitizeValue(value));\n  }\n\n  function attributeBinding(el, name, conditional) {\n    return function(value) {\n      updateAttribute(el, name, conditional, value);\n    };\n  }\n\n  Element.prototype.bind = function(name, value, oneTime) {\n    var conditional = name[name.length - 1] == '?';\n    if (conditional) {\n      this.removeAttribute(name);\n      name = name.slice(0, -1);\n    }\n\n    if (oneTime)\n      return updateAttribute(this, name, conditional, value);\n\n\n    var observable = value;\n    updateAttribute(this, name, conditional,\n        observable.open(attributeBinding(this, name, conditional)));\n\n    return maybeUpdateBindings(this, name, observable);\n  };\n\n  var checkboxEventType;\n  (function() {\n    // Attempt to feature-detect which event (change or click) is fired first\n    // for checkboxes.\n    var div = document.createElement('div');\n    var checkbox = div.appendChild(document.createElement('input'));\n    checkbox.setAttribute('type', 'checkbox');\n    var first;\n    var count = 0;\n    checkbox.addEventListener('click', function(e) {\n      count++;\n      first = first || 'click';\n    });\n    checkbox.addEventListener('change', function() {\n      count++;\n      first = first || 'change';\n    });\n\n    var event = document.createEvent('MouseEvent');\n    event.initMouseEvent(\"click\", true, true, window, 0, 0, 0, 0, 0, false,\n        false, false, false, 0, null);\n    checkbox.dispatchEvent(event);\n    // WebKit/Blink don't fire the change event if the element is outside the\n    // document, so assume 'change' for that case.\n    checkboxEventType = count == 1 ? 'change' : first;\n  })();\n\n  function getEventForInputType(element) {\n    switch (element.type) {\n      case 'checkbox':\n        return checkboxEventType;\n      case 'radio':\n      case 'select-multiple':\n      case 'select-one':\n        return 'change';\n      case 'range':\n        if (/Trident|MSIE/.test(navigator.userAgent))\n          return 'change';\n      default:\n        return 'input';\n    }\n  }\n\n  function updateInput(input, property, value, santizeFn) {\n    input[property] = (santizeFn || sanitizeValue)(value);\n  }\n\n  function inputBinding(input, property, santizeFn) {\n    return function(value) {\n      return updateInput(input, property, value, santizeFn);\n    }\n  }\n\n  function noop() {}\n\n  function bindInputEvent(input, property, observable, postEventFn) {\n    var eventType = getEventForInputType(input);\n\n    function eventHandler() {\n      observable.setValue(input[property]);\n      observable.discardChanges();\n      (postEventFn || noop)(input);\n      Platform.performMicrotaskCheckpoint();\n    }\n    input.addEventListener(eventType, eventHandler);\n\n    return {\n      close: function() {\n        input.removeEventListener(eventType, eventHandler);\n        observable.close();\n      },\n\n      observable_: observable\n    }\n  }\n\n  function booleanSanitize(value) {\n    return Boolean(value);\n  }\n\n  // |element| is assumed to be an HTMLInputElement with |type| == 'radio'.\n  // Returns an array containing all radio buttons other than |element| that\n  // have the same |name|, either in the form that |element| belongs to or,\n  // if no form, in the document tree to which |element| belongs.\n  //\n  // This implementation is based upon the HTML spec definition of a\n  // \"radio button group\":\n  //   http://www.whatwg.org/specs/web-apps/current-work/multipage/number-state.html#radio-button-group\n  //\n  function getAssociatedRadioButtons(element) {\n    if (element.form) {\n      return filter(element.form.elements, function(el) {\n        return el != element &&\n            el.tagName == 'INPUT' &&\n            el.type == 'radio' &&\n            el.name == element.name;\n      });\n    } else {\n      var treeScope = getTreeScope(element);\n      if (!treeScope)\n        return [];\n      var radios = treeScope.querySelectorAll(\n          'input[type=\"radio\"][name=\"' + element.name + '\"]');\n      return filter(radios, function(el) {\n        return el != element && !el.form;\n      });\n    }\n  }\n\n  function checkedPostEvent(input) {\n    // Only the radio button that is getting checked gets an event. We\n    // therefore find all the associated radio buttons and update their\n    // check binding manually.\n    if (input.tagName === 'INPUT' &&\n        input.type === 'radio') {\n      getAssociatedRadioButtons(input).forEach(function(radio) {\n        var checkedBinding = radio.bindings_.checked;\n        if (checkedBinding) {\n          // Set the value directly to avoid an infinite call stack.\n          checkedBinding.observable_.setValue(false);\n        }\n      });\n    }\n  }\n\n  HTMLInputElement.prototype.bind = function(name, value, oneTime) {\n    if (name !== 'value' && name !== 'checked')\n      return HTMLElement.prototype.bind.call(this, name, value, oneTime);\n\n    this.removeAttribute(name);\n    var sanitizeFn = name == 'checked' ? booleanSanitize : sanitizeValue;\n    var postEventFn = name == 'checked' ? checkedPostEvent : noop;\n\n    if (oneTime)\n      return updateInput(this, name, value, sanitizeFn);\n\n\n    var observable = value;\n    var binding = bindInputEvent(this, name, observable, postEventFn);\n    updateInput(this, name,\n                observable.open(inputBinding(this, name, sanitizeFn)),\n                sanitizeFn);\n\n    // Checkboxes may need to update bindings of other checkboxes.\n    return updateBindings(this, name, binding);\n  }\n\n  HTMLTextAreaElement.prototype.bind = function(name, value, oneTime) {\n    if (name !== 'value')\n      return HTMLElement.prototype.bind.call(this, name, value, oneTime);\n\n    this.removeAttribute('value');\n\n    if (oneTime)\n      return updateInput(this, 'value', value);\n\n    var observable = value;\n    var binding = bindInputEvent(this, 'value', observable);\n    updateInput(this, 'value',\n                observable.open(inputBinding(this, 'value', sanitizeValue)));\n    return maybeUpdateBindings(this, name, binding);\n  }\n\n  function updateOption(option, value) {\n    var parentNode = option.parentNode;;\n    var select;\n    var selectBinding;\n    var oldValue;\n    if (parentNode instanceof HTMLSelectElement &&\n        parentNode.bindings_ &&\n        parentNode.bindings_.value) {\n      select = parentNode;\n      selectBinding = select.bindings_.value;\n      oldValue = select.value;\n    }\n\n    option.value = sanitizeValue(value);\n\n    if (select && select.value != oldValue) {\n      selectBinding.observable_.setValue(select.value);\n      selectBinding.observable_.discardChanges();\n      Platform.performMicrotaskCheckpoint();\n    }\n  }\n\n  function optionBinding(option) {\n    return function(value) {\n      updateOption(option, value);\n    }\n  }\n\n  HTMLOptionElement.prototype.bind = function(name, value, oneTime) {\n    if (name !== 'value')\n      return HTMLElement.prototype.bind.call(this, name, value, oneTime);\n\n    this.removeAttribute('value');\n\n    if (oneTime)\n      return updateOption(this, value);\n\n    var observable = value;\n    var binding = bindInputEvent(this, 'value', observable);\n    updateOption(this, observable.open(optionBinding(this)));\n    return maybeUpdateBindings(this, name, binding);\n  }\n\n  HTMLSelectElement.prototype.bind = function(name, value, oneTime) {\n    if (name === 'selectedindex')\n      name = 'selectedIndex';\n\n    if (name !== 'selectedIndex' && name !== 'value')\n      return HTMLElement.prototype.bind.call(this, name, value, oneTime);\n\n    this.removeAttribute(name);\n\n    if (oneTime)\n      return updateInput(this, name, value);\n\n    var observable = value;\n    var binding = bindInputEvent(this, name, observable);\n    updateInput(this, name,\n                observable.open(inputBinding(this, name)));\n\n    // Option update events may need to access select bindings.\n    return updateBindings(this, name, binding);\n  }\n})(this);\n",
     "// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.\n// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt\n// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt\n// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt\n// Code distributed by Google as part of the polymer project is also\n// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt\n\n(function(global) {\n  'use strict';\n\n  function assert(v) {\n    if (!v)\n      throw new Error('Assertion failed');\n  }\n\n  var forEach = Array.prototype.forEach.call.bind(Array.prototype.forEach);\n\n  function getFragmentRoot(node) {\n    var p;\n    while (p = node.parentNode) {\n      node = p;\n    }\n\n    return node;\n  }\n\n  function searchRefId(node, id) {\n    if (!id)\n      return;\n\n    var ref;\n    var selector = '#' + id;\n    while (!ref) {\n      node = getFragmentRoot(node);\n\n      if (node.protoContent_)\n        ref = node.protoContent_.querySelector(selector);\n      else if (node.getElementById)\n        ref = node.getElementById(id);\n\n      if (ref || !node.templateCreator_)\n        break\n\n      node = node.templateCreator_;\n    }\n\n    return ref;\n  }\n\n  function getInstanceRoot(node) {\n    while (node.parentNode) {\n      node = node.parentNode;\n    }\n    return node.templateCreator_ ? node : null;\n  }\n\n  var Map;\n  if (global.Map && typeof global.Map.prototype.forEach === 'function') {\n    Map = global.Map;\n  } else {\n    Map = function() {\n      this.keys = [];\n      this.values = [];\n    };\n\n    Map.prototype = {\n      set: function(key, value) {\n        var index = this.keys.indexOf(key);\n        if (index < 0) {\n          this.keys.push(key);\n          this.values.push(value);\n        } else {\n          this.values[index] = value;\n        }\n      },\n\n      get: function(key) {\n        var index = this.keys.indexOf(key);\n        if (index < 0)\n          return;\n\n        return this.values[index];\n      },\n\n      delete: function(key, value) {\n        var index = this.keys.indexOf(key);\n        if (index < 0)\n          return false;\n\n        this.keys.splice(index, 1);\n        this.values.splice(index, 1);\n        return true;\n      },\n\n      forEach: function(f, opt_this) {\n        for (var i = 0; i < this.keys.length; i++)\n          f.call(opt_this || this, this.values[i], this.keys[i], this);\n      }\n    };\n  }\n\n  // JScript does not have __proto__. We wrap all object literals with\n  // createObject which uses Object.create, Object.defineProperty and\n  // Object.getOwnPropertyDescriptor to create a new object that does the exact\n  // same thing. The main downside to this solution is that we have to extract\n  // all those property descriptors for IE.\n  var createObject = ('__proto__' in {}) ?\n      function(obj) { return obj; } :\n      function(obj) {\n        var proto = obj.__proto__;\n        if (!proto)\n          return obj;\n        var newObject = Object.create(proto);\n        Object.getOwnPropertyNames(obj).forEach(function(name) {\n          Object.defineProperty(newObject, name,\n                               Object.getOwnPropertyDescriptor(obj, name));\n        });\n        return newObject;\n      };\n\n  // IE does not support have Document.prototype.contains.\n  if (typeof document.contains != 'function') {\n    Document.prototype.contains = function(node) {\n      if (node === this || node.parentNode === this)\n        return true;\n      return this.documentElement.contains(node);\n    }\n  }\n\n  var BIND = 'bind';\n  var REPEAT = 'repeat';\n  var IF = 'if';\n\n  var templateAttributeDirectives = {\n    'template': true,\n    'repeat': true,\n    'bind': true,\n    'ref': true\n  };\n\n  var semanticTemplateElements = {\n    'THEAD': true,\n    'TBODY': true,\n    'TFOOT': true,\n    'TH': true,\n    'TR': true,\n    'TD': true,\n    'COLGROUP': true,\n    'COL': true,\n    'CAPTION': true,\n    'OPTION': true,\n    'OPTGROUP': true\n  };\n\n  var hasTemplateElement = typeof HTMLTemplateElement !== 'undefined';\n  if (hasTemplateElement) {\n    // TODO(rafaelw): Remove when fix for\n    // https://codereview.chromium.org/164803002/\n    // makes it to Chrome release.\n    (function() {\n      var t = document.createElement('template');\n      var d = t.content.ownerDocument;\n      var html = d.appendChild(d.createElement('html'));\n      var head = html.appendChild(d.createElement('head'));\n      var base = d.createElement('base');\n      base.href = document.baseURI;\n      head.appendChild(base);\n    })();\n  }\n\n  var allTemplatesSelectors = 'template, ' +\n      Object.keys(semanticTemplateElements).map(function(tagName) {\n        return tagName.toLowerCase() + '[template]';\n      }).join(', ');\n\n  function isSVGTemplate(el) {\n    return el.tagName == 'template' &&\n           el.namespaceURI == 'http://www.w3.org/2000/svg';\n  }\n\n  function isHTMLTemplate(el) {\n    return el.tagName == 'TEMPLATE' &&\n           el.namespaceURI == 'http://www.w3.org/1999/xhtml';\n  }\n\n  function isAttributeTemplate(el) {\n    return Boolean(semanticTemplateElements[el.tagName] &&\n                   el.hasAttribute('template'));\n  }\n\n  function isTemplate(el) {\n    if (el.isTemplate_ === undefined)\n      el.isTemplate_ = el.tagName == 'TEMPLATE' || isAttributeTemplate(el);\n\n    return el.isTemplate_;\n  }\n\n  // FIXME: Observe templates being added/removed from documents\n  // FIXME: Expose imperative API to decorate and observe templates in\n  // \"disconnected tress\" (e.g. ShadowRoot)\n  document.addEventListener('DOMContentLoaded', function(e) {\n    bootstrapTemplatesRecursivelyFrom(document);\n    // FIXME: Is this needed? Seems like it shouldn't be.\n    Platform.performMicrotaskCheckpoint();\n  }, false);\n\n  function forAllTemplatesFrom(node, fn) {\n    var subTemplates = node.querySelectorAll(allTemplatesSelectors);\n\n    if (isTemplate(node))\n      fn(node)\n    forEach(subTemplates, fn);\n  }\n\n  function bootstrapTemplatesRecursivelyFrom(node) {\n    function bootstrap(template) {\n      if (!HTMLTemplateElement.decorate(template))\n        bootstrapTemplatesRecursivelyFrom(template.content);\n    }\n\n    forAllTemplatesFrom(node, bootstrap);\n  }\n\n  if (!hasTemplateElement) {\n    /**\n     * This represents a <template> element.\n     * @constructor\n     * @extends {HTMLElement}\n     */\n    global.HTMLTemplateElement = function() {\n      throw TypeError('Illegal constructor');\n    };\n  }\n\n  var hasProto = '__proto__' in {};\n\n  function mixin(to, from) {\n    Object.getOwnPropertyNames(from).forEach(function(name) {\n      Object.defineProperty(to, name,\n                            Object.getOwnPropertyDescriptor(from, name));\n    });\n  }\n\n  // http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/templates/index.html#dfn-template-contents-owner\n  function getOrCreateTemplateContentsOwner(template) {\n    var doc = template.ownerDocument\n    if (!doc.defaultView)\n      return doc;\n    var d = doc.templateContentsOwner_;\n    if (!d) {\n      // TODO(arv): This should either be a Document or HTMLDocument depending\n      // on doc.\n      d = doc.implementation.createHTMLDocument('');\n      while (d.lastChild) {\n        d.removeChild(d.lastChild);\n      }\n      doc.templateContentsOwner_ = d;\n    }\n    return d;\n  }\n\n  function getTemplateStagingDocument(template) {\n    if (!template.stagingDocument_) {\n      var owner = template.ownerDocument;\n      if (!owner.stagingDocument_) {\n        owner.stagingDocument_ = owner.implementation.createHTMLDocument('');\n\n        // TODO(rafaelw): Remove when fix for\n        // https://codereview.chromium.org/164803002/\n        // makes it to Chrome release.\n        var base = owner.stagingDocument_.createElement('base');\n        base.href = document.baseURI;\n        owner.stagingDocument_.head.appendChild(base);\n\n        owner.stagingDocument_.stagingDocument_ = owner.stagingDocument_;\n      }\n\n      template.stagingDocument_ = owner.stagingDocument_;\n    }\n\n    return template.stagingDocument_;\n  }\n\n  // For non-template browsers, the parser will disallow <template> in certain\n  // locations, so we allow \"attribute templates\" which combine the template\n  // element with the top-level container node of the content, e.g.\n  //\n  //   <tr template repeat=\"{{ foo }}\"\" class=\"bar\"><td>Bar</td></tr>\n  //\n  // becomes\n  //\n  //   <template repeat=\"{{ foo }}\">\n  //   + #document-fragment\n  //     + <tr class=\"bar\">\n  //       + <td>Bar</td>\n  //\n  function extractTemplateFromAttributeTemplate(el) {\n    var template = el.ownerDocument.createElement('template');\n    el.parentNode.insertBefore(template, el);\n\n    var attribs = el.attributes;\n    var count = attribs.length;\n    while (count-- > 0) {\n      var attrib = attribs[count];\n      if (templateAttributeDirectives[attrib.name]) {\n        if (attrib.name !== 'template')\n          template.setAttribute(attrib.name, attrib.value);\n        el.removeAttribute(attrib.name);\n      }\n    }\n\n    return template;\n  }\n\n  function extractTemplateFromSVGTemplate(el) {\n    var template = el.ownerDocument.createElement('template');\n    el.parentNode.insertBefore(template, el);\n\n    var attribs = el.attributes;\n    var count = attribs.length;\n    while (count-- > 0) {\n      var attrib = attribs[count];\n      template.setAttribute(attrib.name, attrib.value);\n      el.removeAttribute(attrib.name);\n    }\n\n    el.parentNode.removeChild(el);\n    return template;\n  }\n\n  function liftNonNativeTemplateChildrenIntoContent(template, el, useRoot) {\n    var content = template.content;\n    if (useRoot) {\n      content.appendChild(el);\n      return;\n    }\n\n    var child;\n    while (child = el.firstChild) {\n      content.appendChild(child);\n    }\n  }\n\n  var templateObserver;\n  if (typeof MutationObserver == 'function') {\n    templateObserver = new MutationObserver(function(records) {\n      for (var i = 0; i < records.length; i++) {\n        records[i].target.refChanged_();\n      }\n    });\n  }\n\n  /**\n   * Ensures proper API and content model for template elements.\n   * @param {HTMLTemplateElement} opt_instanceRef The template element which\n   *     |el| template element will return as the value of its ref(), and whose\n   *     content will be used as source when createInstance() is invoked.\n   */\n  HTMLTemplateElement.decorate = function(el, opt_instanceRef) {\n    if (el.templateIsDecorated_)\n      return false;\n\n    var templateElement = el;\n    templateElement.templateIsDecorated_ = true;\n\n    var isNativeHTMLTemplate = isHTMLTemplate(templateElement) &&\n                               hasTemplateElement;\n    var bootstrapContents = isNativeHTMLTemplate;\n    var liftContents = !isNativeHTMLTemplate;\n    var liftRoot = false;\n\n    if (!isNativeHTMLTemplate) {\n      if (isAttributeTemplate(templateElement)) {\n        assert(!opt_instanceRef);\n        templateElement = extractTemplateFromAttributeTemplate(el);\n        templateElement.templateIsDecorated_ = true;\n        isNativeHTMLTemplate = hasTemplateElement;\n        liftRoot = true;\n      } else if (isSVGTemplate(templateElement)) {\n        templateElement = extractTemplateFromSVGTemplate(el);\n        templateElement.templateIsDecorated_ = true;\n        isNativeHTMLTemplate = hasTemplateElement;\n      }\n    }\n\n    if (!isNativeHTMLTemplate) {\n      fixTemplateElementPrototype(templateElement);\n      var doc = getOrCreateTemplateContentsOwner(templateElement);\n      templateElement.content_ = doc.createDocumentFragment();\n    }\n\n    if (opt_instanceRef) {\n      // template is contained within an instance, its direct content must be\n      // empty\n      templateElement.instanceRef_ = opt_instanceRef;\n    } else if (liftContents) {\n      liftNonNativeTemplateChildrenIntoContent(templateElement,\n                                               el,\n                                               liftRoot);\n    } else if (bootstrapContents) {\n      bootstrapTemplatesRecursivelyFrom(templateElement.content);\n    }\n\n    return true;\n  };\n\n  // TODO(rafaelw): This used to decorate recursively all templates from a given\n  // node. This happens by default on 'DOMContentLoaded', but may be needed\n  // in subtrees not descendent from document (e.g. ShadowRoot).\n  // Review whether this is the right public API.\n  HTMLTemplateElement.bootstrap = bootstrapTemplatesRecursivelyFrom;\n\n  var htmlElement = global.HTMLUnknownElement || HTMLElement;\n\n  var contentDescriptor = {\n    get: function() {\n      return this.content_;\n    },\n    enumerable: true,\n    configurable: true\n  };\n\n  if (!hasTemplateElement) {\n    // Gecko is more picky with the prototype than WebKit. Make sure to use the\n    // same prototype as created in the constructor.\n    HTMLTemplateElement.prototype = Object.create(htmlElement.prototype);\n\n    Object.defineProperty(HTMLTemplateElement.prototype, 'content',\n                          contentDescriptor);\n  }\n\n  function fixTemplateElementPrototype(el) {\n    if (hasProto)\n      el.__proto__ = HTMLTemplateElement.prototype;\n    else\n      mixin(el, HTMLTemplateElement.prototype);\n  }\n\n  function ensureSetModelScheduled(template) {\n    if (!template.setModelFn_) {\n      template.setModelFn_ = function() {\n        template.setModelFnScheduled_ = false;\n        var map = getBindings(template,\n            template.delegate_ && template.delegate_.prepareBinding);\n        processBindings(template, map, template.model_);\n      };\n    }\n\n    if (!template.setModelFnScheduled_) {\n      template.setModelFnScheduled_ = true;\n      Observer.runEOM_(template.setModelFn_);\n    }\n  }\n\n  mixin(HTMLTemplateElement.prototype, {\n    bind: function(name, value, oneTime) {\n      if (name != 'ref')\n        return Element.prototype.bind.call(this, name, value, oneTime);\n\n      var self = this;\n      var ref = oneTime ? value : value.open(function(ref) {\n        self.setAttribute('ref', ref);\n        self.refChanged_();\n      });\n\n      this.setAttribute('ref', ref);\n      this.refChanged_();\n      if (oneTime)\n        return;\n\n      if (!this.bindings_) {\n        this.bindings_ = { ref: value };\n      } else {\n        this.bindings_.ref = value;\n      }\n\n      return value;\n    },\n\n    processBindingDirectives_: function(directives) {\n      if (this.iterator_)\n        this.iterator_.closeDeps();\n\n      if (!directives.if && !directives.bind && !directives.repeat) {\n        if (this.iterator_) {\n          this.iterator_.close();\n          this.iterator_ = undefined;\n        }\n\n        return;\n      }\n\n      if (!this.iterator_) {\n        this.iterator_ = new TemplateIterator(this);\n      }\n\n      this.iterator_.updateDependencies(directives, this.model_);\n\n      if (templateObserver) {\n        templateObserver.observe(this, { attributes: true,\n                                         attributeFilter: ['ref'] });\n      }\n\n      return this.iterator_;\n    },\n\n    createInstance: function(model, bindingDelegate, delegate_) {\n      if (bindingDelegate)\n        delegate_ = this.newDelegate_(bindingDelegate);\n\n      if (!this.refContent_)\n        this.refContent_ = this.ref_.content;\n      var content = this.refContent_;\n      if (content.firstChild === null)\n        return emptyInstance;\n\n      var map = this.bindingMap_;\n      if (!map || map.content !== content) {\n        // TODO(rafaelw): Setup a MutationObserver on content to detect\n        // when the instanceMap is invalid.\n        map = createInstanceBindingMap(content,\n            delegate_ && delegate_.prepareBinding) || [];\n        map.content = content;\n        this.bindingMap_ = map;\n      }\n\n      var stagingDocument = getTemplateStagingDocument(this);\n      var instance = stagingDocument.createDocumentFragment();\n      instance.templateCreator_ = this;\n      instance.protoContent_ = content;\n      instance.bindings_ = [];\n      instance.terminator_ = null;\n      var instanceRecord = instance.templateInstance_ = {\n        firstNode: null,\n        lastNode: null,\n        model: model\n      };\n\n      var i = 0;\n      var collectTerminator = false;\n      for (var child = content.firstChild; child; child = child.nextSibling) {\n        // The terminator of the instance is the clone of the last child of the\n        // content. If the last child is an active template, it may produce\n        // instances as a result of production, so simply collecting the last\n        // child of the instance after it has finished producing may be wrong.\n        if (child.nextSibling === null)\n          collectTerminator = true;\n\n        var clone = cloneAndBindInstance(child, instance, stagingDocument,\n                                         map.children[i++],\n                                         model,\n                                         delegate_,\n                                         instance.bindings_);\n        clone.templateInstance_ = instanceRecord;\n        if (collectTerminator)\n          instance.terminator_ = clone;\n      }\n\n      instanceRecord.firstNode = instance.firstChild;\n      instanceRecord.lastNode = instance.lastChild;\n      instance.templateCreator_ = undefined;\n      instance.protoContent_ = undefined;\n      return instance;\n    },\n\n    get model() {\n      return this.model_;\n    },\n\n    set model(model) {\n      this.model_ = model;\n      ensureSetModelScheduled(this);\n    },\n\n    get bindingDelegate() {\n      return this.delegate_ && this.delegate_.raw;\n    },\n\n    refChanged_: function() {\n      if (!this.iterator_ || this.refContent_ === this.ref_.content)\n        return;\n\n      this.refContent_ = undefined;\n      this.iterator_.valueChanged();\n      this.iterator_.updateIteratedValue();\n    },\n\n    clear: function() {\n      this.model_ = undefined;\n      this.delegate_ = undefined;\n      if (this.bindings_ && this.bindings_.ref)\n        this.bindings_.ref.close()\n      this.refContent_ = undefined;\n      if (!this.iterator_)\n        return;\n      this.iterator_.valueChanged();\n      this.iterator_.close()\n      this.iterator_ = undefined;\n    },\n\n    setDelegate_: function(delegate) {\n      this.delegate_ = delegate;\n      this.bindingMap_ = undefined;\n      if (this.iterator_) {\n        this.iterator_.instancePositionChangedFn_ = undefined;\n        this.iterator_.instanceModelFn_ = undefined;\n      }\n    },\n\n    newDelegate_: function(bindingDelegate) {\n      if (!bindingDelegate)\n        return {};\n\n      function delegateFn(name) {\n        var fn = bindingDelegate && bindingDelegate[name];\n        if (typeof fn != 'function')\n          return;\n\n        return function() {\n          return fn.apply(bindingDelegate, arguments);\n        };\n      }\n\n      return {\n        raw: bindingDelegate,\n        prepareBinding: delegateFn('prepareBinding'),\n        prepareInstanceModel: delegateFn('prepareInstanceModel'),\n        prepareInstancePositionChanged:\n            delegateFn('prepareInstancePositionChanged')\n      };\n    },\n\n    // TODO(rafaelw): Assigning .bindingDelegate always succeeds. It may\n    // make sense to issue a warning or even throw if the template is already\n    // \"activated\", since this would be a strange thing to do.\n    set bindingDelegate(bindingDelegate) {\n      if (this.delegate_) {\n        throw Error('Template must be cleared before a new bindingDelegate ' +\n                    'can be assigned');\n      }\n\n      this.setDelegate_(this.newDelegate_(bindingDelegate));\n    },\n\n    get ref_() {\n      var ref = searchRefId(this, this.getAttribute('ref'));\n      if (!ref)\n        ref = this.instanceRef_;\n\n      if (!ref)\n        return this;\n\n      var nextRef = ref.ref_;\n      return nextRef ? nextRef : ref;\n    }\n  });\n\n  // Returns\n  //   a) undefined if there are no mustaches.\n  //   b) [TEXT, (ONE_TIME?, PATH, DELEGATE_FN, TEXT)+] if there is at least one mustache.\n  function parseMustaches(s, name, node, prepareBindingFn) {\n    if (!s || !s.length)\n      return;\n\n    var tokens;\n    var length = s.length;\n    var startIndex = 0, lastIndex = 0, endIndex = 0;\n    var onlyOneTime = true;\n    while (lastIndex < length) {\n      var startIndex = s.indexOf('{{', lastIndex);\n      var oneTimeStart = s.indexOf('[[', lastIndex);\n      var oneTime = false;\n      var terminator = '}}';\n\n      if (oneTimeStart >= 0 &&\n          (startIndex < 0 || oneTimeStart < startIndex)) {\n        startIndex = oneTimeStart;\n        oneTime = true;\n        terminator = ']]';\n      }\n\n      endIndex = startIndex < 0 ? -1 : s.indexOf(terminator, startIndex + 2);\n\n      if (endIndex < 0) {\n        if (!tokens)\n          return;\n\n        tokens.push(s.slice(lastIndex)); // TEXT\n        break;\n      }\n\n      tokens = tokens || [];\n      tokens.push(s.slice(lastIndex, startIndex)); // TEXT\n      var pathString = s.slice(startIndex + 2, endIndex).trim();\n      tokens.push(oneTime); // ONE_TIME?\n      onlyOneTime = onlyOneTime && oneTime;\n      var delegateFn = prepareBindingFn &&\n                       prepareBindingFn(pathString, name, node);\n      // Don't try to parse the expression if there's a prepareBinding function\n      if (delegateFn == null) {\n        tokens.push(Path.get(pathString)); // PATH\n      } else {\n        tokens.push(null);\n      }\n      tokens.push(delegateFn); // DELEGATE_FN\n      lastIndex = endIndex + 2;\n    }\n\n    if (lastIndex === length)\n      tokens.push(''); // TEXT\n\n    tokens.hasOnePath = tokens.length === 5;\n    tokens.isSimplePath = tokens.hasOnePath &&\n                          tokens[0] == '' &&\n                          tokens[4] == '';\n    tokens.onlyOneTime = onlyOneTime;\n\n    tokens.combinator = function(values) {\n      var newValue = tokens[0];\n\n      for (var i = 1; i < tokens.length; i += 4) {\n        var value = tokens.hasOnePath ? values : values[(i - 1) / 4];\n        if (value !== undefined)\n          newValue += value;\n        newValue += tokens[i + 3];\n      }\n\n      return newValue;\n    }\n\n    return tokens;\n  };\n\n  function processOneTimeBinding(name, tokens, node, model) {\n    if (tokens.hasOnePath) {\n      var delegateFn = tokens[3];\n      var value = delegateFn ? delegateFn(model, node, true) :\n                               tokens[2].getValueFrom(model);\n      return tokens.isSimplePath ? value : tokens.combinator(value);\n    }\n\n    var values = [];\n    for (var i = 1; i < tokens.length; i += 4) {\n      var delegateFn = tokens[i + 2];\n      values[(i - 1) / 4] = delegateFn ? delegateFn(model, node) :\n          tokens[i + 1].getValueFrom(model);\n    }\n\n    return tokens.combinator(values);\n  }\n\n  function processSinglePathBinding(name, tokens, node, model) {\n    var delegateFn = tokens[3];\n    var observer = delegateFn ? delegateFn(model, node, false) :\n        new PathObserver(model, tokens[2]);\n\n    return tokens.isSimplePath ? observer :\n        new ObserverTransform(observer, tokens.combinator);\n  }\n\n  function processBinding(name, tokens, node, model) {\n    if (tokens.onlyOneTime)\n      return processOneTimeBinding(name, tokens, node, model);\n\n    if (tokens.hasOnePath)\n      return processSinglePathBinding(name, tokens, node, model);\n\n    var observer = new CompoundObserver();\n\n    for (var i = 1; i < tokens.length; i += 4) {\n      var oneTime = tokens[i];\n      var delegateFn = tokens[i + 2];\n\n      if (delegateFn) {\n        var value = delegateFn(model, node, oneTime);\n        if (oneTime)\n          observer.addPath(value)\n        else\n          observer.addObserver(value);\n        continue;\n      }\n\n      var path = tokens[i + 1];\n      if (oneTime)\n        observer.addPath(path.getValueFrom(model))\n      else\n        observer.addPath(model, path);\n    }\n\n    return new ObserverTransform(observer, tokens.combinator);\n  }\n\n  function processBindings(node, bindings, model, instanceBindings) {\n    for (var i = 0; i < bindings.length; i += 2) {\n      var name = bindings[i]\n      var tokens = bindings[i + 1];\n      var value = processBinding(name, tokens, node, model);\n      var binding = node.bind(name, value, tokens.onlyOneTime);\n      if (binding && instanceBindings)\n        instanceBindings.push(binding);\n    }\n\n    if (!bindings.isTemplate)\n      return;\n\n    node.model_ = model;\n    var iter = node.processBindingDirectives_(bindings);\n    if (instanceBindings && iter)\n      instanceBindings.push(iter);\n  }\n\n  function parseWithDefault(el, name, prepareBindingFn) {\n    var v = el.getAttribute(name);\n    return parseMustaches(v == '' ? '{{}}' : v, name, el, prepareBindingFn);\n  }\n\n  function parseAttributeBindings(element, prepareBindingFn) {\n    assert(element);\n\n    var bindings = [];\n    var ifFound = false;\n    var bindFound = false;\n\n    for (var i = 0; i < element.attributes.length; i++) {\n      var attr = element.attributes[i];\n      var name = attr.name;\n      var value = attr.value;\n\n      // Allow bindings expressed in attributes to be prefixed with underbars.\n      // We do this to allow correct semantics for browsers that don't implement\n      // <template> where certain attributes might trigger side-effects -- and\n      // for IE which sanitizes certain attributes, disallowing mustache\n      // replacements in their text.\n      while (name[0] === '_') {\n        name = name.substring(1);\n      }\n\n      if (isTemplate(element) &&\n          (name === IF || name === BIND || name === REPEAT)) {\n        continue;\n      }\n\n      var tokens = parseMustaches(value, name, element,\n                                  prepareBindingFn);\n      if (!tokens)\n        continue;\n\n      bindings.push(name, tokens);\n    }\n\n    if (isTemplate(element)) {\n      bindings.isTemplate = true;\n      bindings.if = parseWithDefault(element, IF, prepareBindingFn);\n      bindings.bind = parseWithDefault(element, BIND, prepareBindingFn);\n      bindings.repeat = parseWithDefault(element, REPEAT, prepareBindingFn);\n\n      if (bindings.if && !bindings.bind && !bindings.repeat)\n        bindings.bind = parseMustaches('{{}}', BIND, element, prepareBindingFn);\n    }\n\n    return bindings;\n  }\n\n  function getBindings(node, prepareBindingFn) {\n    if (node.nodeType === Node.ELEMENT_NODE)\n      return parseAttributeBindings(node, prepareBindingFn);\n\n    if (node.nodeType === Node.TEXT_NODE) {\n      var tokens = parseMustaches(node.data, 'textContent', node,\n                                  prepareBindingFn);\n      if (tokens)\n        return ['textContent', tokens];\n    }\n\n    return [];\n  }\n\n  function cloneAndBindInstance(node, parent, stagingDocument, bindings, model,\n                                delegate,\n                                instanceBindings,\n                                instanceRecord) {\n    var clone = parent.appendChild(stagingDocument.importNode(node, false));\n\n    var i = 0;\n    for (var child = node.firstChild; child; child = child.nextSibling) {\n      cloneAndBindInstance(child, clone, stagingDocument,\n                            bindings.children[i++],\n                            model,\n                            delegate,\n                            instanceBindings);\n    }\n\n    if (bindings.isTemplate) {\n      HTMLTemplateElement.decorate(clone, node);\n      if (delegate)\n        clone.setDelegate_(delegate);\n    }\n\n    processBindings(clone, bindings, model, instanceBindings);\n    return clone;\n  }\n\n  function createInstanceBindingMap(node, prepareBindingFn) {\n    var map = getBindings(node, prepareBindingFn);\n    map.children = {};\n    var index = 0;\n    for (var child = node.firstChild; child; child = child.nextSibling) {\n      map.children[index++] = createInstanceBindingMap(child, prepareBindingFn);\n    }\n\n    return map;\n  }\n\n  Object.defineProperty(Node.prototype, 'templateInstance', {\n    get: function() {\n      var instance = this.templateInstance_;\n      return instance ? instance :\n          (this.parentNode ? this.parentNode.templateInstance : undefined);\n    }\n  });\n\n  var emptyInstance = document.createDocumentFragment();\n  emptyInstance.bindings_ = [];\n  emptyInstance.terminator_ = null;\n\n  function TemplateIterator(templateElement) {\n    this.closed = false;\n    this.templateElement_ = templateElement;\n    this.instances = [];\n    this.deps = undefined;\n    this.iteratedValue = [];\n    this.presentValue = undefined;\n    this.arrayObserver = undefined;\n  }\n\n  TemplateIterator.prototype = {\n    closeDeps: function() {\n      var deps = this.deps;\n      if (deps) {\n        if (deps.ifOneTime === false)\n          deps.ifValue.close();\n        if (deps.oneTime === false)\n          deps.value.close();\n      }\n    },\n\n    updateDependencies: function(directives, model) {\n      this.closeDeps();\n\n      var deps = this.deps = {};\n      var template = this.templateElement_;\n\n      if (directives.if) {\n        deps.hasIf = true;\n        deps.ifOneTime = directives.if.onlyOneTime;\n        deps.ifValue = processBinding(IF, directives.if, template, model);\n\n        // oneTime if & predicate is false. nothing else to do.\n        if (deps.ifOneTime && !deps.ifValue) {\n          this.updateIteratedValue();\n          return;\n        }\n\n        if (!deps.ifOneTime)\n          deps.ifValue.open(this.updateIteratedValue, this);\n      }\n\n      if (directives.repeat) {\n        deps.repeat = true;\n        deps.oneTime = directives.repeat.onlyOneTime;\n        deps.value = processBinding(REPEAT, directives.repeat, template, model);\n      } else {\n        deps.repeat = false;\n        deps.oneTime = directives.bind.onlyOneTime;\n        deps.value = processBinding(BIND, directives.bind, template, model);\n      }\n\n      if (!deps.oneTime)\n        deps.value.open(this.updateIteratedValue, this);\n\n      this.updateIteratedValue();\n    },\n\n    updateIteratedValue: function() {\n      if (this.deps.hasIf) {\n        var ifValue = this.deps.ifValue;\n        if (!this.deps.ifOneTime)\n          ifValue = ifValue.discardChanges();\n        if (!ifValue) {\n          this.valueChanged();\n          return;\n        }\n      }\n\n      var value = this.deps.value;\n      if (!this.deps.oneTime)\n        value = value.discardChanges();\n      if (!this.deps.repeat)\n        value = [value];\n      var observe = this.deps.repeat &&\n                    !this.deps.oneTime &&\n                    Array.isArray(value);\n      this.valueChanged(value, observe);\n    },\n\n    valueChanged: function(value, observeValue) {\n      if (!Array.isArray(value))\n        value = [];\n\n      if (value === this.iteratedValue)\n        return;\n\n      this.unobserve();\n      this.presentValue = value;\n      if (observeValue) {\n        this.arrayObserver = new ArrayObserver(this.presentValue);\n        this.arrayObserver.open(this.handleSplices, this);\n      }\n\n      this.handleSplices(ArrayObserver.calculateSplices(this.presentValue,\n                                                        this.iteratedValue));\n    },\n\n    getLastInstanceNode: function(index) {\n      if (index == -1)\n        return this.templateElement_;\n      var instance = this.instances[index];\n      var terminator = instance.terminator_;\n      if (!terminator)\n        return this.getLastInstanceNode(index - 1);\n\n      if (terminator.nodeType !== Node.ELEMENT_NODE ||\n          this.templateElement_ === terminator) {\n        return terminator;\n      }\n\n      var subtemplateIterator = terminator.iterator_;\n      if (!subtemplateIterator)\n        return terminator;\n\n      return subtemplateIterator.getLastTemplateNode();\n    },\n\n    getLastTemplateNode: function() {\n      return this.getLastInstanceNode(this.instances.length - 1);\n    },\n\n    insertInstanceAt: function(index, fragment) {\n      var previousInstanceLast = this.getLastInstanceNode(index - 1);\n      var parent = this.templateElement_.parentNode;\n      this.instances.splice(index, 0, fragment);\n\n      parent.insertBefore(fragment, previousInstanceLast.nextSibling);\n    },\n\n    extractInstanceAt: function(index) {\n      var previousInstanceLast = this.getLastInstanceNode(index - 1);\n      var lastNode = this.getLastInstanceNode(index);\n      var parent = this.templateElement_.parentNode;\n      var instance = this.instances.splice(index, 1)[0];\n\n      while (lastNode !== previousInstanceLast) {\n        var node = previousInstanceLast.nextSibling;\n        if (node == lastNode)\n          lastNode = previousInstanceLast;\n\n        instance.appendChild(parent.removeChild(node));\n      }\n\n      return instance;\n    },\n\n    getDelegateFn: function(fn) {\n      fn = fn && fn(this.templateElement_);\n      return typeof fn === 'function' ? fn : null;\n    },\n\n    handleSplices: function(splices) {\n      if (this.closed || !splices.length)\n        return;\n\n      var template = this.templateElement_;\n\n      if (!template.parentNode) {\n        this.close();\n        return;\n      }\n\n      ArrayObserver.applySplices(this.iteratedValue, this.presentValue,\n                                 splices);\n\n      var delegate = template.delegate_;\n      if (this.instanceModelFn_ === undefined) {\n        this.instanceModelFn_ =\n            this.getDelegateFn(delegate && delegate.prepareInstanceModel);\n      }\n\n      if (this.instancePositionChangedFn_ === undefined) {\n        this.instancePositionChangedFn_ =\n            this.getDelegateFn(delegate &&\n                               delegate.prepareInstancePositionChanged);\n      }\n\n      // Instance Removals\n      var instanceCache = new Map;\n      var removeDelta = 0;\n      for (var i = 0; i < splices.length; i++) {\n        var splice = splices[i];\n        var removed = splice.removed;\n        for (var j = 0; j < removed.length; j++) {\n          var model = removed[j];\n          var instance = this.extractInstanceAt(splice.index + removeDelta);\n          if (instance !== emptyInstance) {\n            instanceCache.set(model, instance);\n          }\n        }\n\n        removeDelta -= splice.addedCount;\n      }\n\n      // Instance Insertions\n      for (var i = 0; i < splices.length; i++) {\n        var splice = splices[i];\n        var addIndex = splice.index;\n        for (; addIndex < splice.index + splice.addedCount; addIndex++) {\n          var model = this.iteratedValue[addIndex];\n          var instance = instanceCache.get(model);\n          if (instance) {\n            instanceCache.delete(model);\n          } else {\n            if (this.instanceModelFn_) {\n              model = this.instanceModelFn_(model);\n            }\n\n            if (model === undefined) {\n              instance = emptyInstance;\n            } else {\n              instance = template.createInstance(model, undefined, delegate);\n            }\n          }\n\n          this.insertInstanceAt(addIndex, instance);\n        }\n      }\n\n      instanceCache.forEach(function(instance) {\n        this.closeInstanceBindings(instance);\n      }, this);\n\n      if (this.instancePositionChangedFn_)\n        this.reportInstancesMoved(splices);\n    },\n\n    reportInstanceMoved: function(index) {\n      var instance = this.instances[index];\n      if (instance === emptyInstance)\n        return;\n\n      this.instancePositionChangedFn_(instance.templateInstance_, index);\n    },\n\n    reportInstancesMoved: function(splices) {\n      var index = 0;\n      var offset = 0;\n      for (var i = 0; i < splices.length; i++) {\n        var splice = splices[i];\n        if (offset != 0) {\n          while (index < splice.index) {\n            this.reportInstanceMoved(index);\n            index++;\n          }\n        } else {\n          index = splice.index;\n        }\n\n        while (index < splice.index + splice.addedCount) {\n          this.reportInstanceMoved(index);\n          index++;\n        }\n\n        offset += splice.addedCount - splice.removed.length;\n      }\n\n      if (offset == 0)\n        return;\n\n      var length = this.instances.length;\n      while (index < length) {\n        this.reportInstanceMoved(index);\n        index++;\n      }\n    },\n\n    closeInstanceBindings: function(instance) {\n      var bindings = instance.bindings_;\n      for (var i = 0; i < bindings.length; i++) {\n        bindings[i].close();\n      }\n    },\n\n    unobserve: function() {\n      if (!this.arrayObserver)\n        return;\n\n      this.arrayObserver.close();\n      this.arrayObserver = undefined;\n    },\n\n    close: function() {\n      if (this.closed)\n        return;\n      this.unobserve();\n      for (var i = 0; i < this.instances.length; i++) {\n        this.closeInstanceBindings(this.instances[i]);\n      }\n\n      this.instances.length = 0;\n      this.closeDeps();\n      this.templateElement_.iterator_ = undefined;\n      this.closed = true;\n    }\n  };\n\n  // Polyfill-specific API.\n  HTMLTemplateElement.forAllTemplatesFrom_ = forAllTemplatesFrom;\n})(this);\n",
     "/*\n  Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com>\n  Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com>\n  Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>\n  Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be>\n  Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl>\n  Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com>\n  Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com>\n  Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com>\n  Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>\n\n  Redistribution and use in source and binary forms, with or without\n  modification, are permitted provided that the following conditions are met:\n\n    * Redistributions of source code must retain the above copyright\n      notice, this list of conditions and the following disclaimer.\n    * Redistributions in binary form must reproduce the above copyright\n      notice, this list of conditions and the following disclaimer in the\n      documentation and/or other materials provided with the distribution.\n\n  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY\n  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\n  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n*/\n\n(function (global) {\n    'use strict';\n\n    var Token,\n        TokenName,\n        Syntax,\n        Messages,\n        source,\n        index,\n        length,\n        delegate,\n        lookahead,\n        state;\n\n    Token = {\n        BooleanLiteral: 1,\n        EOF: 2,\n        Identifier: 3,\n        Keyword: 4,\n        NullLiteral: 5,\n        NumericLiteral: 6,\n        Punctuator: 7,\n        StringLiteral: 8\n    };\n\n    TokenName = {};\n    TokenName[Token.BooleanLiteral] = 'Boolean';\n    TokenName[Token.EOF] = '<end>';\n    TokenName[Token.Identifier] = 'Identifier';\n    TokenName[Token.Keyword] = 'Keyword';\n    TokenName[Token.NullLiteral] = 'Null';\n    TokenName[Token.NumericLiteral] = 'Numeric';\n    TokenName[Token.Punctuator] = 'Punctuator';\n    TokenName[Token.StringLiteral] = 'String';\n\n    Syntax = {\n        ArrayExpression: 'ArrayExpression',\n        BinaryExpression: 'BinaryExpression',\n        CallExpression: 'CallExpression',\n        ConditionalExpression: 'ConditionalExpression',\n        EmptyStatement: 'EmptyStatement',\n        ExpressionStatement: 'ExpressionStatement',\n        Identifier: 'Identifier',\n        Literal: 'Literal',\n        LabeledStatement: 'LabeledStatement',\n        LogicalExpression: 'LogicalExpression',\n        MemberExpression: 'MemberExpression',\n        ObjectExpression: 'ObjectExpression',\n        Program: 'Program',\n        Property: 'Property',\n        ThisExpression: 'ThisExpression',\n        UnaryExpression: 'UnaryExpression'\n    };\n\n    // Error messages should be identical to V8.\n    Messages = {\n        UnexpectedToken:  'Unexpected token %0',\n        UnknownLabel: 'Undefined label \\'%0\\'',\n        Redeclaration: '%0 \\'%1\\' has already been declared'\n    };\n\n    // Ensure the condition is true, otherwise throw an error.\n    // This is only to have a better contract semantic, i.e. another safety net\n    // to catch a logic error. The condition shall be fulfilled in normal case.\n    // Do NOT use this to enforce a certain condition on any user input.\n\n    function assert(condition, message) {\n        if (!condition) {\n            throw new Error('ASSERT: ' + message);\n        }\n    }\n\n    function isDecimalDigit(ch) {\n        return (ch >= 48 && ch <= 57);   // 0..9\n    }\n\n\n    // 7.2 White Space\n\n    function isWhiteSpace(ch) {\n        return (ch === 32) ||  // space\n            (ch === 9) ||      // tab\n            (ch === 0xB) ||\n            (ch === 0xC) ||\n            (ch === 0xA0) ||\n            (ch >= 0x1680 && '\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\uFEFF'.indexOf(String.fromCharCode(ch)) > 0);\n    }\n\n    // 7.3 Line Terminators\n\n    function isLineTerminator(ch) {\n        return (ch === 10) || (ch === 13) || (ch === 0x2028) || (ch === 0x2029);\n    }\n\n    // 7.6 Identifier Names and Identifiers\n\n    function isIdentifierStart(ch) {\n        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)\n            (ch >= 65 && ch <= 90) ||         // A..Z\n            (ch >= 97 && ch <= 122);          // a..z\n    }\n\n    function isIdentifierPart(ch) {\n        return (ch === 36) || (ch === 95) ||  // $ (dollar) and _ (underscore)\n            (ch >= 65 && ch <= 90) ||         // A..Z\n            (ch >= 97 && ch <= 122) ||        // a..z\n            (ch >= 48 && ch <= 57);           // 0..9\n    }\n\n    // 7.6.1.1 Keywords\n\n    function isKeyword(id) {\n        return (id === 'this')\n    }\n\n    // 7.4 Comments\n\n    function skipWhitespace() {\n        while (index < length && isWhiteSpace(source.charCodeAt(index))) {\n           ++index;\n        }\n    }\n\n    function getIdentifier() {\n        var start, ch;\n\n        start = index++;\n        while (index < length) {\n            ch = source.charCodeAt(index);\n            if (isIdentifierPart(ch)) {\n                ++index;\n            } else {\n                break;\n            }\n        }\n\n        return source.slice(start, index);\n    }\n\n    function scanIdentifier() {\n        var start, id, type;\n\n        start = index;\n\n        id = getIdentifier();\n\n        // There is no keyword or literal with only one character.\n        // Thus, it must be an identifier.\n        if (id.length === 1) {\n            type = Token.Identifier;\n        } else if (isKeyword(id)) {\n            type = Token.Keyword;\n        } else if (id === 'null') {\n            type = Token.NullLiteral;\n        } else if (id === 'true' || id === 'false') {\n            type = Token.BooleanLiteral;\n        } else {\n            type = Token.Identifier;\n        }\n\n        return {\n            type: type,\n            value: id,\n            range: [start, index]\n        };\n    }\n\n\n    // 7.7 Punctuators\n\n    function scanPunctuator() {\n        var start = index,\n            code = source.charCodeAt(index),\n            code2,\n            ch1 = source[index],\n            ch2;\n\n        switch (code) {\n\n        // Check for most common single-character punctuators.\n        case 46:   // . dot\n        case 40:   // ( open bracket\n        case 41:   // ) close bracket\n        case 59:   // ; semicolon\n        case 44:   // , comma\n        case 123:  // { open curly brace\n        case 125:  // } close curly brace\n        case 91:   // [\n        case 93:   // ]\n        case 58:   // :\n        case 63:   // ?\n            ++index;\n            return {\n                type: Token.Punctuator,\n                value: String.fromCharCode(code),\n                range: [start, index]\n            };\n\n        default:\n            code2 = source.charCodeAt(index + 1);\n\n            // '=' (char #61) marks an assignment or comparison operator.\n            if (code2 === 61) {\n                switch (code) {\n                case 37:  // %\n                case 38:  // &\n                case 42:  // *:\n                case 43:  // +\n                case 45:  // -\n                case 47:  // /\n                case 60:  // <\n                case 62:  // >\n                case 124: // |\n                    index += 2;\n                    return {\n                        type: Token.Punctuator,\n                        value: String.fromCharCode(code) + String.fromCharCode(code2),\n                        range: [start, index]\n                    };\n\n                case 33: // !\n                case 61: // =\n                    index += 2;\n\n                    // !== and ===\n                    if (source.charCodeAt(index) === 61) {\n                        ++index;\n                    }\n                    return {\n                        type: Token.Punctuator,\n                        value: source.slice(start, index),\n                        range: [start, index]\n                    };\n                default:\n                    break;\n                }\n            }\n            break;\n        }\n\n        // Peek more characters.\n\n        ch2 = source[index + 1];\n\n        // Other 2-character punctuators: && ||\n\n        if (ch1 === ch2 && ('&|'.indexOf(ch1) >= 0)) {\n            index += 2;\n            return {\n                type: Token.Punctuator,\n                value: ch1 + ch2,\n                range: [start, index]\n            };\n        }\n\n        if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {\n            ++index;\n            return {\n                type: Token.Punctuator,\n                value: ch1,\n                range: [start, index]\n            };\n        }\n\n        throwError({}, Messages.UnexpectedToken, 'ILLEGAL');\n    }\n\n    // 7.8.3 Numeric Literals\n    function scanNumericLiteral() {\n        var number, start, ch;\n\n        ch = source[index];\n        assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),\n            'Numeric literal must start with a decimal digit or a decimal point');\n\n        start = index;\n        number = '';\n        if (ch !== '.') {\n            number = source[index++];\n            ch = source[index];\n\n            // Hex number starts with '0x'.\n            // Octal number starts with '0'.\n            if (number === '0') {\n                // decimal number starts with '0' such as '09' is illegal.\n                if (ch && isDecimalDigit(ch.charCodeAt(0))) {\n                    throwError({}, Messages.UnexpectedToken, 'ILLEGAL');\n                }\n            }\n\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === '.') {\n            number += source[index++];\n            while (isDecimalDigit(source.charCodeAt(index))) {\n                number += source[index++];\n            }\n            ch = source[index];\n        }\n\n        if (ch === 'e' || ch === 'E') {\n            number += source[index++];\n\n            ch = source[index];\n            if (ch === '+' || ch === '-') {\n                number += source[index++];\n            }\n            if (isDecimalDigit(source.charCodeAt(index))) {\n                while (isDecimalDigit(source.charCodeAt(index))) {\n                    number += source[index++];\n                }\n            } else {\n                throwError({}, Messages.UnexpectedToken, 'ILLEGAL');\n            }\n        }\n\n        if (isIdentifierStart(source.charCodeAt(index))) {\n            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');\n        }\n\n        return {\n            type: Token.NumericLiteral,\n            value: parseFloat(number),\n            range: [start, index]\n        };\n    }\n\n    // 7.8.4 String Literals\n\n    function scanStringLiteral() {\n        var str = '', quote, start, ch, octal = false;\n\n        quote = source[index];\n        assert((quote === '\\'' || quote === '\"'),\n            'String literal must starts with a quote');\n\n        start = index;\n        ++index;\n\n        while (index < length) {\n            ch = source[index++];\n\n            if (ch === quote) {\n                quote = '';\n                break;\n            } else if (ch === '\\\\') {\n                ch = source[index++];\n                if (!ch || !isLineTerminator(ch.charCodeAt(0))) {\n                    switch (ch) {\n                    case 'n':\n                        str += '\\n';\n                        break;\n                    case 'r':\n                        str += '\\r';\n                        break;\n                    case 't':\n                        str += '\\t';\n                        break;\n                    case 'b':\n                        str += '\\b';\n                        break;\n                    case 'f':\n                        str += '\\f';\n                        break;\n                    case 'v':\n                        str += '\\x0B';\n                        break;\n\n                    default:\n                        str += ch;\n                        break;\n                    }\n                } else {\n                    if (ch ===  '\\r' && source[index] === '\\n') {\n                        ++index;\n                    }\n                }\n            } else if (isLineTerminator(ch.charCodeAt(0))) {\n                break;\n            } else {\n                str += ch;\n            }\n        }\n\n        if (quote !== '') {\n            throwError({}, Messages.UnexpectedToken, 'ILLEGAL');\n        }\n\n        return {\n            type: Token.StringLiteral,\n            value: str,\n            octal: octal,\n            range: [start, index]\n        };\n    }\n\n    function isIdentifierName(token) {\n        return token.type === Token.Identifier ||\n            token.type === Token.Keyword ||\n            token.type === Token.BooleanLiteral ||\n            token.type === Token.NullLiteral;\n    }\n\n    function advance() {\n        var ch;\n\n        skipWhitespace();\n\n        if (index >= length) {\n            return {\n                type: Token.EOF,\n                range: [index, index]\n            };\n        }\n\n        ch = source.charCodeAt(index);\n\n        // Very common: ( and ) and ;\n        if (ch === 40 || ch === 41 || ch === 58) {\n            return scanPunctuator();\n        }\n\n        // String literal starts with single quote (#39) or double quote (#34).\n        if (ch === 39 || ch === 34) {\n            return scanStringLiteral();\n        }\n\n        if (isIdentifierStart(ch)) {\n            return scanIdentifier();\n        }\n\n        // Dot (.) char #46 can also start a floating-point number, hence the need\n        // to check the next character.\n        if (ch === 46) {\n            if (isDecimalDigit(source.charCodeAt(index + 1))) {\n                return scanNumericLiteral();\n            }\n            return scanPunctuator();\n        }\n\n        if (isDecimalDigit(ch)) {\n            return scanNumericLiteral();\n        }\n\n        return scanPunctuator();\n    }\n\n    function lex() {\n        var token;\n\n        token = lookahead;\n        index = token.range[1];\n\n        lookahead = advance();\n\n        index = token.range[1];\n\n        return token;\n    }\n\n    function peek() {\n        var pos;\n\n        pos = index;\n        lookahead = advance();\n        index = pos;\n    }\n\n    // Throw an exception\n\n    function throwError(token, messageFormat) {\n        var error,\n            args = Array.prototype.slice.call(arguments, 2),\n            msg = messageFormat.replace(\n                /%(\\d)/g,\n                function (whole, index) {\n                    assert(index < args.length, 'Message reference must be in range');\n                    return args[index];\n                }\n            );\n\n        error = new Error(msg);\n        error.index = index;\n        error.description = msg;\n        throw error;\n    }\n\n    // Throw an exception because of the token.\n\n    function throwUnexpected(token) {\n        throwError(token, Messages.UnexpectedToken, token.value);\n    }\n\n    // Expect the next token to match the specified punctuator.\n    // If not, an exception will be thrown.\n\n    function expect(value) {\n        var token = lex();\n        if (token.type !== Token.Punctuator || token.value !== value) {\n            throwUnexpected(token);\n        }\n    }\n\n    // Return true if the next token matches the specified punctuator.\n\n    function match(value) {\n        return lookahead.type === Token.Punctuator && lookahead.value === value;\n    }\n\n    // Return true if the next token matches the specified keyword\n\n    function matchKeyword(keyword) {\n        return lookahead.type === Token.Keyword && lookahead.value === keyword;\n    }\n\n    function consumeSemicolon() {\n        // Catch the very common case first: immediately a semicolon (char #59).\n        if (source.charCodeAt(index) === 59) {\n            lex();\n            return;\n        }\n\n        skipWhitespace();\n\n        if (match(';')) {\n            lex();\n            return;\n        }\n\n        if (lookahead.type !== Token.EOF && !match('}')) {\n            throwUnexpected(lookahead);\n        }\n    }\n\n    // 11.1.4 Array Initialiser\n\n    function parseArrayInitialiser() {\n        var elements = [];\n\n        expect('[');\n\n        while (!match(']')) {\n            if (match(',')) {\n                lex();\n                elements.push(null);\n            } else {\n                elements.push(parseExpression());\n\n                if (!match(']')) {\n                    expect(',');\n                }\n            }\n        }\n\n        expect(']');\n\n        return delegate.createArrayExpression(elements);\n    }\n\n    // 11.1.5 Object Initialiser\n\n    function parseObjectPropertyKey() {\n        var token;\n\n        skipWhitespace();\n        token = lex();\n\n        // Note: This function is called only from parseObjectProperty(), where\n        // EOF and Punctuator tokens are already filtered out.\n        if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) {\n            return delegate.createLiteral(token);\n        }\n\n        return delegate.createIdentifier(token.value);\n    }\n\n    function parseObjectProperty() {\n        var token, key;\n\n        token = lookahead;\n        skipWhitespace();\n\n        if (token.type === Token.EOF || token.type === Token.Punctuator) {\n            throwUnexpected(token);\n        }\n\n        key = parseObjectPropertyKey();\n        expect(':');\n        return delegate.createProperty('init', key, parseExpression());\n    }\n\n    function parseObjectInitialiser() {\n        var properties = [];\n\n        expect('{');\n\n        while (!match('}')) {\n            properties.push(parseObjectProperty());\n\n            if (!match('}')) {\n                expect(',');\n            }\n        }\n\n        expect('}');\n\n        return delegate.createObjectExpression(properties);\n    }\n\n    // 11.1.6 The Grouping Operator\n\n    function parseGroupExpression() {\n        var expr;\n\n        expect('(');\n\n        expr = parseExpression();\n\n        expect(')');\n\n        return expr;\n    }\n\n\n    // 11.1 Primary Expressions\n\n    function parsePrimaryExpression() {\n        var type, token, expr;\n\n        if (match('(')) {\n            return parseGroupExpression();\n        }\n\n        type = lookahead.type;\n\n        if (type === Token.Identifier) {\n            expr = delegate.createIdentifier(lex().value);\n        } else if (type === Token.StringLiteral || type === Token.NumericLiteral) {\n            expr = delegate.createLiteral(lex());\n        } else if (type === Token.Keyword) {\n            if (matchKeyword('this')) {\n                lex();\n                expr = delegate.createThisExpression();\n            }\n        } else if (type === Token.BooleanLiteral) {\n            token = lex();\n            token.value = (token.value === 'true');\n            expr = delegate.createLiteral(token);\n        } else if (type === Token.NullLiteral) {\n            token = lex();\n            token.value = null;\n            expr = delegate.createLiteral(token);\n        } else if (match('[')) {\n            expr = parseArrayInitialiser();\n        } else if (match('{')) {\n            expr = parseObjectInitialiser();\n        }\n\n        if (expr) {\n            return expr;\n        }\n\n        throwUnexpected(lex());\n    }\n\n    // 11.2 Left-Hand-Side Expressions\n\n    function parseArguments() {\n        var args = [];\n\n        expect('(');\n\n        if (!match(')')) {\n            while (index < length) {\n                args.push(parseExpression());\n                if (match(')')) {\n                    break;\n                }\n                expect(',');\n            }\n        }\n\n        expect(')');\n\n        return args;\n    }\n\n    function parseNonComputedProperty() {\n        var token;\n\n        token = lex();\n\n        if (!isIdentifierName(token)) {\n            throwUnexpected(token);\n        }\n\n        return delegate.createIdentifier(token.value);\n    }\n\n    function parseNonComputedMember() {\n        expect('.');\n\n        return parseNonComputedProperty();\n    }\n\n    function parseComputedMember() {\n        var expr;\n\n        expect('[');\n\n        expr = parseExpression();\n\n        expect(']');\n\n        return expr;\n    }\n\n    function parseLeftHandSideExpression() {\n        var expr, property;\n\n        expr = parsePrimaryExpression();\n\n        while (match('.') || match('[')) {\n            if (match('[')) {\n                property = parseComputedMember();\n                expr = delegate.createMemberExpression('[', expr, property);\n            } else {\n                property = parseNonComputedMember();\n                expr = delegate.createMemberExpression('.', expr, property);\n            }\n        }\n\n        return expr;\n    }\n\n    // 11.3 Postfix Expressions\n\n    var parsePostfixExpression = parseLeftHandSideExpression;\n\n    // 11.4 Unary Operators\n\n    function parseUnaryExpression() {\n        var token, expr;\n\n        if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) {\n            expr = parsePostfixExpression();\n        } else if (match('+') || match('-') || match('!')) {\n            token = lex();\n            expr = parseUnaryExpression();\n            expr = delegate.createUnaryExpression(token.value, expr);\n        } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {\n            throwError({}, Messages.UnexpectedToken);\n        } else {\n            expr = parsePostfixExpression();\n        }\n\n        return expr;\n    }\n\n    function binaryPrecedence(token) {\n        var prec = 0;\n\n        if (token.type !== Token.Punctuator && token.type !== Token.Keyword) {\n            return 0;\n        }\n\n        switch (token.value) {\n        case '||':\n            prec = 1;\n            break;\n\n        case '&&':\n            prec = 2;\n            break;\n\n        case '==':\n        case '!=':\n        case '===':\n        case '!==':\n            prec = 6;\n            break;\n\n        case '<':\n        case '>':\n        case '<=':\n        case '>=':\n        case 'instanceof':\n            prec = 7;\n            break;\n\n        case 'in':\n            prec = 7;\n            break;\n\n        case '+':\n        case '-':\n            prec = 9;\n            break;\n\n        case '*':\n        case '/':\n        case '%':\n            prec = 11;\n            break;\n\n        default:\n            break;\n        }\n\n        return prec;\n    }\n\n    // 11.5 Multiplicative Operators\n    // 11.6 Additive Operators\n    // 11.7 Bitwise Shift Operators\n    // 11.8 Relational Operators\n    // 11.9 Equality Operators\n    // 11.10 Binary Bitwise Operators\n    // 11.11 Binary Logical Operators\n\n    function parseBinaryExpression() {\n        var expr, token, prec, stack, right, operator, left, i;\n\n        left = parseUnaryExpression();\n\n        token = lookahead;\n        prec = binaryPrecedence(token);\n        if (prec === 0) {\n            return left;\n        }\n        token.prec = prec;\n        lex();\n\n        right = parseUnaryExpression();\n\n        stack = [left, token, right];\n\n        while ((prec = binaryPrecedence(lookahead)) > 0) {\n\n            // Reduce: make a binary expression from the three topmost entries.\n            while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) {\n                right = stack.pop();\n                operator = stack.pop().value;\n                left = stack.pop();\n                expr = delegate.createBinaryExpression(operator, left, right);\n                stack.push(expr);\n            }\n\n            // Shift.\n            token = lex();\n            token.prec = prec;\n            stack.push(token);\n            expr = parseUnaryExpression();\n            stack.push(expr);\n        }\n\n        // Final reduce to clean-up the stack.\n        i = stack.length - 1;\n        expr = stack[i];\n        while (i > 1) {\n            expr = delegate.createBinaryExpression(stack[i - 1].value, stack[i - 2], expr);\n            i -= 2;\n        }\n\n        return expr;\n    }\n\n\n    // 11.12 Conditional Operator\n\n    function parseConditionalExpression() {\n        var expr, consequent, alternate;\n\n        expr = parseBinaryExpression();\n\n        if (match('?')) {\n            lex();\n            consequent = parseConditionalExpression();\n            expect(':');\n            alternate = parseConditionalExpression();\n\n            expr = delegate.createConditionalExpression(expr, consequent, alternate);\n        }\n\n        return expr;\n    }\n\n    // Simplification since we do not support AssignmentExpression.\n    var parseExpression = parseConditionalExpression;\n\n    // Polymer Syntax extensions\n\n    // Filter ::\n    //   Identifier\n    //   Identifier \"(\" \")\"\n    //   Identifier \"(\" FilterArguments \")\"\n\n    function parseFilter() {\n        var identifier, args;\n\n        identifier = lex();\n\n        if (identifier.type !== Token.Identifier) {\n            throwUnexpected(identifier);\n        }\n\n        args = match('(') ? parseArguments() : [];\n\n        return delegate.createFilter(identifier.value, args);\n    }\n\n    // Filters ::\n    //   \"|\" Filter\n    //   Filters \"|\" Filter\n\n    function parseFilters() {\n        while (match('|')) {\n            lex();\n            parseFilter();\n        }\n    }\n\n    // TopLevel ::\n    //   LabelledExpressions\n    //   AsExpression\n    //   InExpression\n    //   FilterExpression\n\n    // AsExpression ::\n    //   FilterExpression as Identifier\n\n    // InExpression ::\n    //   Identifier, Identifier in FilterExpression\n    //   Identifier in FilterExpression\n\n    // FilterExpression ::\n    //   Expression\n    //   Expression Filters\n\n    function parseTopLevel() {\n        skipWhitespace();\n        peek();\n\n        var expr = parseExpression();\n        if (expr) {\n            if (lookahead.value === ',' || lookahead.value == 'in' &&\n                       expr.type === Syntax.Identifier) {\n                parseInExpression(expr);\n            } else {\n                parseFilters();\n                if (lookahead.value === 'as') {\n                    parseAsExpression(expr);\n                } else {\n                    delegate.createTopLevel(expr);\n                }\n            }\n        }\n\n        if (lookahead.type !== Token.EOF) {\n            throwUnexpected(lookahead);\n        }\n    }\n\n    function parseAsExpression(expr) {\n        lex();  // as\n        var identifier = lex().value;\n        delegate.createAsExpression(expr, identifier);\n    }\n\n    function parseInExpression(identifier) {\n        var indexName;\n        if (lookahead.value === ',') {\n            lex();\n            if (lookahead.type !== Token.Identifier)\n                throwUnexpected(lookahead);\n            indexName = lex().value;\n        }\n\n        lex();  // in\n        var expr = parseExpression();\n        parseFilters();\n        delegate.createInExpression(identifier.name, indexName, expr);\n    }\n\n    function parse(code, inDelegate) {\n        delegate = inDelegate;\n        source = code;\n        index = 0;\n        length = source.length;\n        lookahead = null;\n        state = {\n            labelSet: {}\n        };\n\n        return parseTopLevel();\n    }\n\n    global.esprima = {\n        parse: parse\n    };\n})(this);\n",
     "// Copyright (c) 2014 The Polymer Project Authors. All rights reserved.\n// This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt\n// The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt\n// The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt\n// Code distributed by Google as part of the polymer project is also\n// subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt\n\n(function (global) {\n  'use strict';\n\n  // JScript does not have __proto__. We wrap all object literals with\n  // createObject which uses Object.create, Object.defineProperty and\n  // Object.getOwnPropertyDescriptor to create a new object that does the exact\n  // same thing. The main downside to this solution is that we have to extract\n  // all those property descriptors for IE.\n  var createObject = ('__proto__' in {}) ?\n      function(obj) { return obj; } :\n      function(obj) {\n        var proto = obj.__proto__;\n        if (!proto)\n          return obj;\n        var newObject = Object.create(proto);\n        Object.getOwnPropertyNames(obj).forEach(function(name) {\n          Object.defineProperty(newObject, name,\n                               Object.getOwnPropertyDescriptor(obj, name));\n        });\n        return newObject;\n      };\n\n  function prepareBinding(expressionText, name, node, filterRegistry) {\n    var expression;\n    try {\n      expression = getExpression(expressionText);\n      if (expression.scopeIdent &&\n          (node.nodeType !== Node.ELEMENT_NODE ||\n           node.tagName !== 'TEMPLATE' ||\n           (name !== 'bind' && name !== 'repeat'))) {\n        throw Error('as and in can only be used within <template bind/repeat>');\n      }\n    } catch (ex) {\n      console.error('Invalid expression syntax: ' + expressionText, ex);\n      return;\n    }\n\n    return function(model, node, oneTime) {\n      var binding = expression.getBinding(model, filterRegistry, oneTime);\n      if (expression.scopeIdent && binding) {\n        node.polymerExpressionScopeIdent_ = expression.scopeIdent;\n        if (expression.indexIdent)\n          node.polymerExpressionIndexIdent_ = expression.indexIdent;\n      }\n\n      return binding;\n    }\n  }\n\n  // TODO(rafaelw): Implement simple LRU.\n  var expressionParseCache = Object.create(null);\n\n  function getExpression(expressionText) {\n    var expression = expressionParseCache[expressionText];\n    if (!expression) {\n      var delegate = new ASTDelegate();\n      esprima.parse(expressionText, delegate);\n      expression = new Expression(delegate);\n      expressionParseCache[expressionText] = expression;\n    }\n    return expression;\n  }\n\n  function Literal(value) {\n    this.value = value;\n    this.valueFn_ = undefined;\n  }\n\n  Literal.prototype = {\n    valueFn: function() {\n      if (!this.valueFn_) {\n        var value = this.value;\n        this.valueFn_ = function() {\n          return value;\n        }\n      }\n\n      return this.valueFn_;\n    }\n  }\n\n  function IdentPath(name) {\n    this.name = name;\n    this.path = Path.get(name);\n  }\n\n  IdentPath.prototype = {\n    valueFn: function() {\n      if (!this.valueFn_) {\n        var name = this.name;\n        var path = this.path;\n        this.valueFn_ = function(model, observer) {\n          if (observer)\n            observer.addPath(model, path);\n\n          return path.getValueFrom(model);\n        }\n      }\n\n      return this.valueFn_;\n    },\n\n    setValue: function(model, newValue) {\n      if (this.path.length == 1);\n        model = findScope(model, this.path[0]);\n\n      return this.path.setValueFrom(model, newValue);\n    }\n  };\n\n  function MemberExpression(object, property, accessor) {\n    // convert literal computed property access where literal value is a value\n    // path to ident dot-access.\n    if (accessor == '[' &&\n        property instanceof Literal &&\n        Path.get(property.value).valid) {\n      accessor = '.';\n      property = new IdentPath(property.value);\n    }\n\n    this.dynamicDeps = typeof object == 'function' || object.dynamic;\n\n    this.dynamic = typeof property == 'function' ||\n                   property.dynamic ||\n                   accessor == '[';\n\n    this.simplePath =\n        !this.dynamic &&\n        !this.dynamicDeps &&\n        property instanceof IdentPath &&\n        (object instanceof MemberExpression || object instanceof IdentPath);\n\n    this.object = this.simplePath ? object : getFn(object);\n    this.property = accessor == '.' ? property : getFn(property);\n  }\n\n  MemberExpression.prototype = {\n    get fullPath() {\n      if (!this.fullPath_) {\n        var last = this.object instanceof IdentPath ?\n            this.object.name : this.object.fullPath;\n        this.fullPath_ = Path.get(last + '.' + this.property.name);\n      }\n\n      return this.fullPath_;\n    },\n\n    valueFn: function() {\n      if (!this.valueFn_) {\n        var object = this.object;\n\n        if (this.simplePath) {\n          var path = this.fullPath;\n\n          this.valueFn_ = function(model, observer) {\n            if (observer)\n              observer.addPath(model, path);\n\n            return path.getValueFrom(model);\n          };\n        } else if (this.property instanceof IdentPath) {\n          var path = Path.get(this.property.name);\n\n          this.valueFn_ = function(model, observer) {\n            var context = object(model, observer);\n\n            if (observer)\n              observer.addPath(context, path);\n\n            return path.getValueFrom(context);\n          }\n        } else {\n          // Computed property.\n          var property = this.property;\n\n          this.valueFn_ = function(model, observer) {\n            var context = object(model, observer);\n            var propName = property(model, observer);\n            if (observer)\n              observer.addPath(context, propName);\n\n            return context ? context[propName] : undefined;\n          };\n        }\n      }\n      return this.valueFn_;\n    },\n\n    setValue: function(model, newValue) {\n      if (this.simplePath) {\n        this.fullPath.setValueFrom(model, newValue);\n        return newValue;\n      }\n\n      var object = this.object(model);\n      var propName = this.property instanceof IdentPath ? this.property.name :\n          this.property(model);\n      return object[propName] = newValue;\n    }\n  };\n\n  function Filter(name, args) {\n    this.name = name;\n    this.args = [];\n    for (var i = 0; i < args.length; i++) {\n      this.args[i] = getFn(args[i]);\n    }\n  }\n\n  Filter.prototype = {\n    transform: function(value, toModelDirection, filterRegistry, model,\n                        observer) {\n      var fn = filterRegistry[this.name];\n      var context = model;\n      if (fn) {\n        context = undefined;\n      } else {\n        fn = context[this.name];\n        if (!fn) {\n          console.error('Cannot find filter: ' + this.name);\n          return;\n        }\n      }\n\n      // If toModelDirection is falsey, then the \"normal\" (dom-bound) direction\n      // is used. Otherwise, it looks for a 'toModel' property function on the\n      // object.\n      if (toModelDirection) {\n        fn = fn.toModel;\n      } else if (typeof fn.toDOM == 'function') {\n        fn = fn.toDOM;\n      }\n\n      if (typeof fn != 'function') {\n        console.error('No ' + (toModelDirection ? 'toModel' : 'toDOM') +\n                      ' found on' + this.name);\n        return;\n      }\n\n      var args = [value];\n      for (var i = 0; i < this.args.length; i++) {\n        args[i + 1] = getFn(this.args[i])(model, observer);\n      }\n\n      return fn.apply(context, args);\n    }\n  };\n\n  function notImplemented() { throw Error('Not Implemented'); }\n\n  var unaryOperators = {\n    '+': function(v) { return +v; },\n    '-': function(v) { return -v; },\n    '!': function(v) { return !v; }\n  };\n\n  var binaryOperators = {\n    '+': function(l, r) { return l+r; },\n    '-': function(l, r) { return l-r; },\n    '*': function(l, r) { return l*r; },\n    '/': function(l, r) { return l/r; },\n    '%': function(l, r) { return l%r; },\n    '<': function(l, r) { return l<r; },\n    '>': function(l, r) { return l>r; },\n    '<=': function(l, r) { return l<=r; },\n    '>=': function(l, r) { return l>=r; },\n    '==': function(l, r) { return l==r; },\n    '!=': function(l, r) { return l!=r; },\n    '===': function(l, r) { return l===r; },\n    '!==': function(l, r) { return l!==r; },\n    '&&': function(l, r) { return l&&r; },\n    '||': function(l, r) { return l||r; },\n  };\n\n  function getFn(arg) {\n    return typeof arg == 'function' ? arg : arg.valueFn();\n  }\n\n  function ASTDelegate() {\n    this.expression = null;\n    this.filters = [];\n    this.deps = {};\n    this.currentPath = undefined;\n    this.scopeIdent = undefined;\n    this.indexIdent = undefined;\n    this.dynamicDeps = false;\n  }\n\n  ASTDelegate.prototype = {\n    createUnaryExpression: function(op, argument) {\n      if (!unaryOperators[op])\n        throw Error('Disallowed operator: ' + op);\n\n      argument = getFn(argument);\n\n      return function(model, observer) {\n        return unaryOperators[op](argument(model, observer));\n      };\n    },\n\n    createBinaryExpression: function(op, left, right) {\n      if (!binaryOperators[op])\n        throw Error('Disallowed operator: ' + op);\n\n      left = getFn(left);\n      right = getFn(right);\n\n      return function(model, observer) {\n        return binaryOperators[op](left(model, observer),\n                                   right(model, observer));\n      };\n    },\n\n    createConditionalExpression: function(test, consequent, alternate) {\n      test = getFn(test);\n      consequent = getFn(consequent);\n      alternate = getFn(alternate);\n\n      return function(model, observer) {\n        return test(model, observer) ?\n            consequent(model, observer) : alternate(model, observer);\n      }\n    },\n\n    createIdentifier: function(name) {\n      var ident = new IdentPath(name);\n      ident.type = 'Identifier';\n      return ident;\n    },\n\n    createMemberExpression: function(accessor, object, property) {\n      var ex = new MemberExpression(object, property, accessor);\n      if (ex.dynamicDeps)\n        this.dynamicDeps = true;\n      return ex;\n    },\n\n    createLiteral: function(token) {\n      return new Literal(token.value);\n    },\n\n    createArrayExpression: function(elements) {\n      for (var i = 0; i < elements.length; i++)\n        elements[i] = getFn(elements[i]);\n\n      return function(model, observer) {\n        var arr = []\n        for (var i = 0; i < elements.length; i++)\n          arr.push(elements[i](model, observer));\n        return arr;\n      }\n    },\n\n    createProperty: function(kind, key, value) {\n      return {\n        key: key instanceof IdentPath ? key.name : key.value,\n        value: value\n      };\n    },\n\n    createObjectExpression: function(properties) {\n      for (var i = 0; i < properties.length; i++)\n        properties[i].value = getFn(properties[i].value);\n\n      return function(model, observer) {\n        var obj = {};\n        for (var i = 0; i < properties.length; i++)\n          obj[properties[i].key] = properties[i].value(model, observer);\n        return obj;\n      }\n    },\n\n    createFilter: function(name, args) {\n      this.filters.push(new Filter(name, args));\n    },\n\n    createAsExpression: function(expression, scopeIdent) {\n      this.expression = expression;\n      this.scopeIdent = scopeIdent;\n    },\n\n    createInExpression: function(scopeIdent, indexIdent, expression) {\n      this.expression = expression;\n      this.scopeIdent = scopeIdent;\n      this.indexIdent = indexIdent;\n    },\n\n    createTopLevel: function(expression) {\n      this.expression = expression;\n    },\n\n    createThisExpression: notImplemented\n  }\n\n  function ConstantObservable(value) {\n    this.value_ = value;\n  }\n\n  ConstantObservable.prototype = {\n    open: function() { return this.value_; },\n    discardChanges: function() { return this.value_; },\n    deliver: function() {},\n    close: function() {},\n  }\n\n  function Expression(delegate) {\n    this.scopeIdent = delegate.scopeIdent;\n    this.indexIdent = delegate.indexIdent;\n\n    if (!delegate.expression)\n      throw Error('No expression found.');\n\n    this.expression = delegate.expression;\n    getFn(this.expression); // forces enumeration of path dependencies\n\n    this.filters = delegate.filters;\n    this.dynamicDeps = delegate.dynamicDeps;\n  }\n\n  Expression.prototype = {\n    getBinding: function(model, filterRegistry, oneTime) {\n      if (oneTime)\n        return this.getValue(model, undefined, filterRegistry);\n\n      var observer = new CompoundObserver();\n      // captures deps.\n      var firstValue = this.getValue(model, observer, filterRegistry);\n      var firstTime = true;\n      var self = this;\n\n      function valueFn() {\n        // deps cannot have changed on first value retrieval.\n        if (firstTime) {\n          firstTime = false;\n          return firstValue;\n        }\n\n        if (self.dynamicDeps)\n          observer.startReset();\n\n        var value = self.getValue(model,\n                                  self.dynamicDeps ? observer : undefined,\n                                  filterRegistry);\n        if (self.dynamicDeps)\n          observer.finishReset();\n\n        return value;\n      }\n\n      function setValueFn(newValue) {\n        self.setValue(model, newValue, filterRegistry);\n        return newValue;\n      }\n\n      return new ObserverTransform(observer, valueFn, setValueFn, true);\n    },\n\n    getValue: function(model, observer, filterRegistry) {\n      var value = getFn(this.expression)(model, observer);\n      for (var i = 0; i < this.filters.length; i++) {\n        value = this.filters[i].transform(value, false, filterRegistry, model,\n                                          observer);\n      }\n\n      return value;\n    },\n\n    setValue: function(model, newValue, filterRegistry) {\n      var count = this.filters ? this.filters.length : 0;\n      while (count-- > 0) {\n        newValue = this.filters[count].transform(newValue, true, filterRegistry,\n                                                 model);\n      }\n\n      if (this.expression.setValue)\n        return this.expression.setValue(model, newValue);\n    }\n  }\n\n  /**\n   * Converts a style property name to a css property name. For example:\n   * \"WebkitUserSelect\" to \"-webkit-user-select\"\n   */\n  function convertStylePropertyName(name) {\n    return String(name).replace(/[A-Z]/g, function(c) {\n      return '-' + c.toLowerCase();\n    });\n  }\n\n  function isEventHandler(name) {\n    return name[0] === 'o' &&\n           name[1] === 'n' &&\n           name[2] === '-';\n  }\n\n  var mixedCaseEventTypes = {};\n  [\n    'webkitAnimationStart',\n    'webkitAnimationEnd',\n    'webkitTransitionEnd',\n    'DOMFocusOut',\n    'DOMFocusIn',\n    'DOMMouseScroll'\n  ].forEach(function(e) {\n    mixedCaseEventTypes[e.toLowerCase()] = e;\n  });\n\n  var parentScopeName = '@' + Math.random().toString(36).slice(2);\n\n  // Single ident paths must bind directly to the appropriate scope object.\n  // I.e. Pushed values in two-bindings need to be assigned to the actual model\n  // object.\n  function findScope(model, prop) {\n    while (model[parentScopeName] &&\n           !Object.prototype.hasOwnProperty.call(model, prop)) {\n      model = model[parentScopeName];\n    }\n\n    return model;\n  }\n\n  function resolveEventReceiver(model, path, node) {\n    if (path.length == 0)\n      return undefined;\n\n    if (path.length == 1)\n      return findScope(model, path[0]);\n\n    for (var i = 0; model != null && i < path.length - 1; i++) {\n      model = model[path[i]];\n    }\n\n    return model;\n  }\n\n  function prepareEventBinding(path, name, polymerExpressions) {\n    var eventType = name.substring(3);\n    eventType = mixedCaseEventTypes[eventType] || eventType;\n\n    return function(model, node, oneTime) {\n      var fn, receiver, handler;\n      if (typeof polymerExpressions.resolveEventHandler == 'function') {\n        handler = function(e) {\n          fn = fn || polymerExpressions.resolveEventHandler(model, path, node);\n          fn(e, e.detail, e.currentTarget);\n\n          if (Platform && typeof Platform.flush == 'function')\n            Platform.flush();\n        };\n      } else {\n        handler = function(e) {\n          fn = fn || path.getValueFrom(model);\n          receiver = receiver || resolveEventReceiver(model, path, node);\n\n          fn.apply(receiver, [e, e.detail, e.currentTarget]);\n\n          if (Platform && typeof Platform.flush == 'function')\n            Platform.flush();\n        };\n      }\n\n      node.addEventListener(eventType, handler);\n\n      if (oneTime)\n        return;\n\n      function bindingValue() {\n        return '{{ ' + path + ' }}';\n      }\n\n      return {\n        open: bindingValue,\n        discardChanges: bindingValue,\n        close: function() {\n          node.removeEventListener(eventType, handler);\n        }\n      };\n    }\n  }\n\n  function isLiteralExpression(pathString) {\n    switch (pathString) {\n      case '':\n        return false;\n\n      case 'false':\n      case 'null':\n      case 'true':\n        return true;\n    }\n\n    if (!isNaN(Number(pathString)))\n      return true;\n\n    return false;\n  };\n\n  function PolymerExpressions() {}\n\n  PolymerExpressions.prototype = {\n    // \"built-in\" filters\n    styleObject: function(value) {\n      var parts = [];\n      for (var key in value) {\n        parts.push(convertStylePropertyName(key) + ': ' + value[key]);\n      }\n      return parts.join('; ');\n    },\n\n    tokenList: function(value) {\n      var tokens = [];\n      for (var key in value) {\n        if (value[key])\n          tokens.push(key);\n      }\n      return tokens.join(' ');\n    },\n\n    // binding delegate API\n    prepareInstancePositionChanged: function(template) {\n      var indexIdent = template.polymerExpressionIndexIdent_;\n      if (!indexIdent)\n        return;\n\n      return function(templateInstance, index) {\n        templateInstance.model[indexIdent] = index;\n      };\n    },\n\n    prepareBinding: function(pathString, name, node) {\n      var path = Path.get(pathString);\n      if (isEventHandler(name)) {\n        if (!path.valid) {\n          console.error('on-* bindings must be simple path expressions');\n          return;\n        }\n\n        return prepareEventBinding(path, name, this);\n      }\n\n      if (!isLiteralExpression(pathString) && path.valid) {\n        if (path.length == 1) {\n          return function(model, node, oneTime) {\n            if (oneTime)\n              return path.getValueFrom(model);\n\n            var scope = findScope(model, path[0]);\n            return new PathObserver(scope, path);\n          };\n        }\n        return; // bail out early if pathString is simple path.\n      }\n\n      return prepareBinding(pathString, name, node, this);\n    },\n\n    prepareInstanceModel: function(template) {\n      var scopeName = template.polymerExpressionScopeIdent_;\n      if (!scopeName)\n        return;\n\n      var parentScope = template.templateInstance ?\n          template.templateInstance.model :\n          template.model;\n\n      var indexName = template.polymerExpressionIndexIdent_;\n\n      return function(model) {\n        var scope = Object.create(parentScope);\n        scope[scopeName] = model;\n        scope[indexName] = undefined;\n        scope[parentScopeName] = parentScope;\n        return scope;\n      };\n    }\n  };\n\n  global.PolymerExpressions = PolymerExpressions;\n  if (global.exposeGetExpression)\n    global.getExpression_ = getExpression;\n\n  global.PolymerExpressions.prepareEventBinding = prepareEventBinding;\n})(this);\n",
     "/*\n * Copyright 2013 The Polymer Authors. All rights reserved.\n * Use of this source code is governed by a BSD-style\n * license that can be found in the LICENSE file.\n */\n(function(scope) {\n\n// inject style sheet\nvar style = document.createElement('style');\nstyle.textContent = 'template {display: none !important;} /* injected by platform.js */';\nvar head = document.querySelector('head');\nhead.insertBefore(style, head.firstChild);\n\n// flush (with logging)\nvar flushing;\nfunction flush() {\n  if (!flushing) {\n    flushing = true;\n    scope.endOfMicrotask(function() {\n      flushing = false;\n      logFlags.data && console.group('Platform.flush()');\n      scope.performMicrotaskCheckpoint();\n      logFlags.data && console.groupEnd();\n    });\n  }\n};\n\n// polling dirty checker\n// flush periodically if platform does not have object observe.\nif (!Observer.hasObjectObserve) {\n  var FLUSH_POLL_INTERVAL = 125;\n  window.addEventListener('WebComponentsReady', function() {\n    flush();\n    scope.flushPoll = setInterval(flush, FLUSH_POLL_INTERVAL);\n  });\n} else {\n  // make flush a no-op when we have Object.observe\n  flush = function() {};\n}\n\nif (window.CustomElements && !CustomElements.useNative) {\n  var originalImportNode = Document.prototype.importNode;\n  Document.prototype.importNode = function(node, deep) {\n    var imported = originalImportNode.call(this, node, deep);\n    CustomElements.upgradeAll(imported);\n    return imported;\n  }\n}\n\n// exports\nscope.flush = flush;\n\n})(window.Platform);\n\n"
   ]
 }