mcs-ng-material/resources/lib/angular-material/modules/closure/core/core.js

MCS NG-Meterial is based on mcs-web.

/*!
 * AngularJS Material Design
 * https://github.com/angular/material
 * @license MIT
 * v1.1.6
 */
goog.provide('ngmaterial.core');






/**
 * Initialization function that validates environment
 * requirements.
 */
DetectNgTouch['$inject'] = ["$log", "$injector"];
MdCoreConfigure['$inject'] = ["$provide", "$mdThemingProvider"];
rAFDecorator['$inject'] = ["$delegate"];
qDecorator['$inject'] = ["$delegate"];
angular
  .module('material.core', [
    'ngAnimate',
    'material.core.animate',
    'material.core.layout',
    'material.core.interaction',
    'material.core.gestures',
    'material.core.theming'
  ])
  .config(MdCoreConfigure)
  .run(DetectNgTouch);


/**
 * Detect if the ng-Touch module is also being used.
 * Warn if detected.
 * ngInject
 */
function DetectNgTouch($log, $injector) {
  if ( $injector.has('$swipe') ) {
    var msg = "" +
      "You are using the ngTouch module. \n" +
      "AngularJS Material already has mobile click, tap, and swipe support... \n" +
      "ngTouch is not supported with AngularJS Material!";
    $log.warn(msg);
  }
}

/**
 * ngInject
 */
function MdCoreConfigure($provide, $mdThemingProvider) {

  $provide.decorator('$$rAF', ['$delegate', rAFDecorator]);
  $provide.decorator('$q', ['$delegate', qDecorator]);

  $mdThemingProvider.theme('default')
    .primaryPalette('indigo')
    .accentPalette('pink')
    .warnPalette('deep-orange')
    .backgroundPalette('grey');
}

/**
 * ngInject
 */
function rAFDecorator($delegate) {
  /**
   * Use this to throttle events that come in often.
   * The throttled function will always use the *last* invocation before the
   * coming frame.
   *
   * For example, window resize events that fire many times a second:
   * If we set to use an raf-throttled callback on window resize, then
   * our callback will only be fired once per frame, with the last resize
   * event that happened before that frame.
   *
   * @param {function} callback function to debounce
   */
  $delegate.throttle = function(cb) {
    var queuedArgs, alreadyQueued, queueCb, context;
    return function debounced() {
      queuedArgs = arguments;
      context = this;
      queueCb = cb;
      if (!alreadyQueued) {
        alreadyQueued = true;
        $delegate(function() {
          queueCb.apply(context, Array.prototype.slice.call(queuedArgs));
          alreadyQueued = false;
        });
      }
    };
  };
  return $delegate;
}

/**
 * ngInject
 */
function qDecorator($delegate) {
  /**
   * Adds a shim for $q.resolve for AngularJS version that don't have it,
   * so we don't have to think about it.
   *
   * via https://github.com/angular/angular.js/pull/11987
   */

  // TODO(crisbeto): this won't be necessary once we drop AngularJS 1.3
  if (!$delegate.resolve) {
    $delegate.resolve = $delegate.when;
  }
  return $delegate;
}


MdAutofocusDirective['$inject'] = ["$parse"];angular.module('material.core')
  .directive('mdAutofocus', MdAutofocusDirective)

  // Support the deprecated md-auto-focus and md-sidenav-focus as well
  .directive('mdAutoFocus', MdAutofocusDirective)
  .directive('mdSidenavFocus', MdAutofocusDirective);

/**
 * @ngdoc directive
 * @name mdAutofocus
 * @module material.core.util
 *
 * @description
 *
 * `[md-autofocus]` provides an optional way to identify the focused element when a `$mdDialog`,
 * `$mdBottomSheet`, `$mdMenu` or `$mdSidenav` opens or upon page load for input-like elements.
 *
 * When one of these opens, it will find the first nested element with the `[md-autofocus]`
 * attribute directive and optional expression. An expression may be specified as the directive
 * value to enable conditional activation of the autofocus.
 *
 * @usage
 *
 * ### Dialog
 * <hljs lang="html">
 * <md-dialog>
 *   <form>
 *     <md-input-container>
 *       <label for="testInput">Label</label>
 *       <input id="testInput" type="text" md-autofocus>
 *     </md-input-container>
 *   </form>
 * </md-dialog>
 * </hljs>
 *
 * ### Bottomsheet
 * <hljs lang="html">
 * <md-bottom-sheet class="md-list md-has-header">
 *  <md-subheader>Comment Actions</md-subheader>
 *  <md-list>
 *    <md-list-item ng-repeat="item in items">
 *
 *      <md-button md-autofocus="$index == 2">
 *        <md-icon md-svg-src="{{item.icon}}"></md-icon>
 *        <span class="md-inline-list-icon-label">{{ item.name }}</span>
 *      </md-button>
 *
 *    </md-list-item>
 *  </md-list>
 * </md-bottom-sheet>
 * </hljs>
 *
 * ### Autocomplete
 * <hljs lang="html">
 *   <md-autocomplete
 *       md-autofocus
 *       md-selected-item="selectedItem"
 *       md-search-text="searchText"
 *       md-items="item in getMatches(searchText)"
 *       md-item-text="item.display">
 *     <span md-highlight-text="searchText">{{item.display}}</span>
 *   </md-autocomplete>
 * </hljs>
 *
 * ### Sidenav
 * <hljs lang="html">
 * <div layout="row" ng-controller="MyController">
 *   <md-sidenav md-component-id="left" class="md-sidenav-left">
 *     Left Nav!
 *   </md-sidenav>
 *
 *   <md-content>
 *     Center Content
 *     <md-button ng-click="openLeftMenu()">
 *       Open Left Menu
 *     </md-button>
 *   </md-content>
 *
 *   <md-sidenav md-component-id="right"
 *     md-is-locked-open="$mdMedia('min-width: 333px')"
 *     class="md-sidenav-right">
 *     <form>
 *       <md-input-container>
 *         <label for="testInput">Test input</label>
 *         <input id="testInput" type="text"
 *                ng-model="data" md-autofocus>
 *       </md-input-container>
 *     </form>
 *   </md-sidenav>
 * </div>
 * </hljs>
 **/
function MdAutofocusDirective($parse) {
  return {
    restrict: 'A',
    link: {
      pre: preLink
    }
  };

  function preLink(scope, element, attr) {
    var attrExp = attr.mdAutoFocus || attr.mdAutofocus || attr.mdSidenavFocus;

    // Initially update the expression by manually parsing the expression as per $watch source.
    updateExpression($parse(attrExp)(scope));

    // Only watch the expression if it is not empty.
    if (attrExp) {
      scope.$watch(attrExp, updateExpression);
    }

    /**
     * Updates the autofocus class which is used to determine whether the attribute
     * expression evaluates to true or false.
     * @param {string|boolean} value Attribute Value
     */
    function updateExpression(value) {

      // Rather than passing undefined to the jqLite toggle class function we explicitly set the
      // value to true. Otherwise the class will be just toggled instead of being forced.
      if (angular.isUndefined(value)) {
        value = true;
      }

      element.toggleClass('md-autofocus', !!value);
    }
  }

}

/**
 * @ngdoc module
 * @name material.core.colorUtil
 * @description
 * Color Util
 */
angular
  .module('material.core')
  .factory('$mdColorUtil', ColorUtilFactory);

function ColorUtilFactory() {
  /**
   * Converts hex value to RGBA string
   * @param color {string}
   * @returns {string}
   */
  function hexToRgba (color) {
    var hex   = color[ 0 ] === '#' ? color.substr(1) : color,
      dig   = hex.length / 3,
      red   = hex.substr(0, dig),
      green = hex.substr(dig, dig),
      blue  = hex.substr(dig * 2);
    if (dig === 1) {
      red += red;
      green += green;
      blue += blue;
    }
    return 'rgba(' + parseInt(red, 16) + ',' + parseInt(green, 16) + ',' + parseInt(blue, 16) + ',0.1)';
  }

  /**
   * Converts rgba value to hex string
   * @param color {string}
   * @returns {string}
   */
  function rgbaToHex(color) {
    color = color.match(/^rgba?[\s+]?\([\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?,[\s+]?(\d+)[\s+]?/i);

    var hex = (color && color.length === 4) ? "#" +
    ("0" + parseInt(color[1],10).toString(16)).slice(-2) +
    ("0" + parseInt(color[2],10).toString(16)).slice(-2) +
    ("0" + parseInt(color[3],10).toString(16)).slice(-2) : '';

    return hex.toUpperCase();
  }

  /**
   * Converts an RGB color to RGBA
   * @param color {string}
   * @returns {string}
   */
  function rgbToRgba (color) {
    return color.replace(')', ', 0.1)').replace('(', 'a(');
  }

  /**
   * Converts an RGBA color to RGB
   * @param color {string}
   * @returns {string}
   */
  function rgbaToRgb (color) {
    return color
      ? color.replace('rgba', 'rgb').replace(/,[^),]+\)/, ')')
      : 'rgb(0,0,0)';
  }

  return {
    rgbaToHex: rgbaToHex,
    hexToRgba: hexToRgba,
    rgbToRgba: rgbToRgba,
    rgbaToRgb: rgbaToRgb
  };
}

angular.module('material.core')
.factory('$mdConstant', MdConstantFactory);

/**
 * Factory function that creates the grab-bag $mdConstant service.
 * ngInject
 */
function MdConstantFactory() {

  var prefixTestEl = document.createElement('div');
  var vendorPrefix = getVendorPrefix(prefixTestEl);
  var isWebkit = /webkit/i.test(vendorPrefix);
  var SPECIAL_CHARS_REGEXP = /([:\-_]+(.))/g;

  function vendorProperty(name) {
    // Add a dash between the prefix and name, to be able to transform the string into camelcase.
    var prefixedName = vendorPrefix + '-' + name;
    var ucPrefix = camelCase(prefixedName);
    var lcPrefix = ucPrefix.charAt(0).toLowerCase() + ucPrefix.substring(1);

    return hasStyleProperty(prefixTestEl, name)     ? name     :       // The current browser supports the un-prefixed property
           hasStyleProperty(prefixTestEl, ucPrefix) ? ucPrefix :       // The current browser only supports the prefixed property.
           hasStyleProperty(prefixTestEl, lcPrefix) ? lcPrefix : name; // Some browsers are only supporting the prefix in lowercase.
  }

  function hasStyleProperty(testElement, property) {
    return angular.isDefined(testElement.style[property]);
  }

  function camelCase(input) {
    return input.replace(SPECIAL_CHARS_REGEXP, function(matches, separator, letter, offset) {
      return offset ? letter.toUpperCase() : letter;
    });
  }

  function getVendorPrefix(testElement) {
    var prop, match;
    var vendorRegex = /^(Moz|webkit|ms)(?=[A-Z])/;

    for (prop in testElement.style) {
      if (match = vendorRegex.exec(prop)) {
        return match[0];
      }
    }
  }

  var self = {
    isInputKey : function(e) { return (e.keyCode >= 31 && e.keyCode <= 90); },
    isNumPadKey : function(e) { return (3 === e.location && e.keyCode >= 97 && e.keyCode <= 105); },
    isMetaKey: function(e) { return (e.keyCode >= 91 && e.keyCode <= 93); },
    isFnLockKey: function(e) { return (e.keyCode >= 112 && e.keyCode <= 145); },
    isNavigationKey : function(e) {
      var kc = self.KEY_CODE, NAVIGATION_KEYS =  [kc.SPACE, kc.ENTER, kc.UP_ARROW, kc.DOWN_ARROW];
      return (NAVIGATION_KEYS.indexOf(e.keyCode) != -1);
    },
    hasModifierKey: function(e) {
      return e.ctrlKey || e.metaKey || e.altKey;
    },

    /**
     * Maximum size, in pixels, that can be explicitly set to an element. The actual value varies
     * between browsers, but IE11 has the very lowest size at a mere 1,533,917px. Ideally we could
     * compute this value, but Firefox always reports an element to have a size of zero if it
     * goes over the max, meaning that we'd have to binary search for the value.
     */
    ELEMENT_MAX_PIXELS: 1533917,

    /**
     * Priority for a directive that should run before the directives from ngAria.
     */
    BEFORE_NG_ARIA: 210,

    /**
     * Common Keyboard actions and their associated keycode.
     */
    KEY_CODE: {
      COMMA: 188,
      SEMICOLON : 186,
      ENTER: 13,
      ESCAPE: 27,
      SPACE: 32,
      PAGE_UP: 33,
      PAGE_DOWN: 34,
      END: 35,
      HOME: 36,
      LEFT_ARROW : 37,
      UP_ARROW : 38,
      RIGHT_ARROW : 39,
      DOWN_ARROW : 40,
      TAB : 9,
      BACKSPACE: 8,
      DELETE: 46
    },

    /**
     * Vendor prefixed CSS properties to be used to support the given functionality in older browsers
     * as well.
     */
    CSS: {
      /* Constants */
      TRANSITIONEND: 'transitionend' + (isWebkit ? ' webkitTransitionEnd' : ''),
      ANIMATIONEND: 'animationend' + (isWebkit ? ' webkitAnimationEnd' : ''),

      TRANSFORM: vendorProperty('transform'),
      TRANSFORM_ORIGIN: vendorProperty('transformOrigin'),
      TRANSITION: vendorProperty('transition'),
      TRANSITION_DURATION: vendorProperty('transitionDuration'),
      ANIMATION_PLAY_STATE: vendorProperty('animationPlayState'),
      ANIMATION_DURATION: vendorProperty('animationDuration'),
      ANIMATION_NAME: vendorProperty('animationName'),
      ANIMATION_TIMING: vendorProperty('animationTimingFunction'),
      ANIMATION_DIRECTION: vendorProperty('animationDirection')
    },

    /**
     * As defined in core/style/variables.scss
     *
     * $layout-breakpoint-xs:     600px !default;
     * $layout-breakpoint-sm:     960px !default;
     * $layout-breakpoint-md:     1280px !default;
     * $layout-breakpoint-lg:     1920px !default;
     *
     */
    MEDIA: {
      'xs'        : '(max-width: 599px)'                         ,
      'gt-xs'     : '(min-width: 600px)'                         ,
      'sm'        : '(min-width: 600px) and (max-width: 959px)'  ,
      'gt-sm'     : '(min-width: 960px)'                         ,
      'md'        : '(min-width: 960px) and (max-width: 1279px)' ,
      'gt-md'     : '(min-width: 1280px)'                        ,
      'lg'        : '(min-width: 1280px) and (max-width: 1919px)',
      'gt-lg'     : '(min-width: 1920px)'                        ,
      'xl'        : '(min-width: 1920px)'                        ,
      'landscape' : '(orientation: landscape)'                   ,
      'portrait'  : '(orientation: portrait)'                    ,
      'print' : 'print'
    },

    MEDIA_PRIORITY: [
      'xl',
      'gt-lg',
      'lg',
      'gt-md',
      'md',
      'gt-sm',
      'sm',
      'gt-xs',
      'xs',
      'landscape',
      'portrait',
      'print'
    ]
  };

  return self;
}

  angular
    .module('material.core')
    .config( ["$provide", function($provide){
       $provide.decorator('$mdUtil', ['$delegate', function ($delegate){
           /**
            * Inject the iterator facade to easily support iteration and accessors
            * @see iterator below
            */
           $delegate.iterator = MdIterator;

           return $delegate;
         }
       ]);
     }]);

  /**
   * iterator is a list facade to easily support iteration and accessors
   *
   * @param items Array list which this iterator will enumerate
   * @param reloop Boolean enables iterator to consider the list as an endless reloop
   */
  function MdIterator(items, reloop) {
    var trueFn = function() { return true; };

    if (items && !angular.isArray(items)) {
      items = Array.prototype.slice.call(items);
    }

    reloop = !!reloop;
    var _items = items || [ ];

    // Published API
    return {
      items: getItems,
      count: count,

      inRange: inRange,
      contains: contains,
      indexOf: indexOf,
      itemAt: itemAt,

      findBy: findBy,

      add: add,
      remove: remove,

      first: first,
      last: last,
      next: angular.bind(null, findSubsequentItem, false),
      previous: angular.bind(null, findSubsequentItem, true),

      hasPrevious: hasPrevious,
      hasNext: hasNext

    };

    /**
     * Publish copy of the enumerable set
     * @returns {Array|*}
     */
    function getItems() {
      return [].concat(_items);
    }

    /**
     * Determine length of the list
     * @returns {Array.length|*|number}
     */
    function count() {
      return _items.length;
    }

    /**
     * Is the index specified valid
     * @param index
     * @returns {Array.length|*|number|boolean}
     */
    function inRange(index) {
      return _items.length && ( index > -1 ) && (index < _items.length );
    }

    /**
     * Can the iterator proceed to the next item in the list; relative to
     * the specified item.
     *
     * @param item
     * @returns {Array.length|*|number|boolean}
     */
    function hasNext(item) {
      return item ? inRange(indexOf(item) + 1) : false;
    }

    /**
     * Can the iterator proceed to the previous item in the list; relative to
     * the specified item.
     *
     * @param item
     * @returns {Array.length|*|number|boolean}
     */
    function hasPrevious(item) {
      return item ? inRange(indexOf(item) - 1) : false;
    }

    /**
     * Get item at specified index/position
     * @param index
     * @returns {*}
     */
    function itemAt(index) {
      return inRange(index) ? _items[index] : null;
    }

    /**
     * Find all elements matching the key/value pair
     * otherwise return null
     *
     * @param val
     * @param key
     *
     * @return array
     */
    function findBy(key, val) {
      return _items.filter(function(item) {
        return item[key] === val;
      });
    }

    /**
     * Add item to list
     * @param item
     * @param index
     * @returns {*}
     */
    function add(item, index) {
      if ( !item ) return -1;

      if (!angular.isNumber(index)) {
        index = _items.length;
      }

      _items.splice(index, 0, item);

      return indexOf(item);
    }

    /**
     * Remove item from list...
     * @param item
     */
    function remove(item) {
      if ( contains(item) ){
        _items.splice(indexOf(item), 1);
      }
    }

    /**
     * Get the zero-based index of the target item
     * @param item
     * @returns {*}
     */
    function indexOf(item) {
      return _items.indexOf(item);
    }

    /**
     * Boolean existence check
     * @param item
     * @returns {boolean}
     */
    function contains(item) {
      return item && (indexOf(item) > -1);
    }

    /**
     * Return first item in the list
     * @returns {*}
     */
    function first() {
      return _items.length ? _items[0] : null;
    }

    /**
     * Return last item in the list...
     * @returns {*}
     */
    function last() {
      return _items.length ? _items[_items.length - 1] : null;
    }

    /**
     * Find the next item. If reloop is true and at the end of the list, it will go back to the
     * first item. If given, the `validate` callback will be used to determine whether the next item
     * is valid. If not valid, it will try to find the next item again.
     *
     * @param {boolean} backwards Specifies the direction of searching (forwards/backwards)
     * @param {*} item The item whose subsequent item we are looking for
     * @param {Function=} validate The `validate` function
     * @param {integer=} limit The recursion limit
     *
     * @returns {*} The subsequent item or null
     */
    function findSubsequentItem(backwards, item, validate, limit) {
      validate = validate || trueFn;

      var curIndex = indexOf(item);
      while (true) {
        if (!inRange(curIndex)) return null;

        var nextIndex = curIndex + (backwards ? -1 : 1);
        var foundItem = null;
        if (inRange(nextIndex)) {
          foundItem = _items[nextIndex];
        } else if (reloop) {
          foundItem = backwards ? last() : first();
          nextIndex = indexOf(foundItem);
        }

        if ((foundItem === null) || (nextIndex === limit)) return null;
        if (validate(foundItem)) return foundItem;

        if (angular.isUndefined(limit)) limit = nextIndex;

        curIndex = nextIndex;
      }
    }
  }



mdMediaFactory['$inject'] = ["$mdConstant", "$rootScope", "$window"];angular.module('material.core')
.factory('$mdMedia', mdMediaFactory);

/**
 * @ngdoc service
 * @name $mdMedia
 * @module material.core
 *
 * @description
 * `$mdMedia` is used to evaluate whether a given media query is true or false given the
 * current device's screen / window size. The media query will be re-evaluated on resize, allowing
 * you to register a watch.
 *
 * `$mdMedia` also has pre-programmed support for media queries that match the layout breakpoints:
 *
 *  <table class="md-api-table">
 *    <thead>
 *    <tr>
 *      <th>Breakpoint</th>
 *      <th>mediaQuery</th>
 *    </tr>
 *    </thead>
 *    <tbody>
 *    <tr>
 *      <td>xs</td>
 *      <td>(max-width: 599px)</td>
 *    </tr>
 *    <tr>
 *      <td>gt-xs</td>
 *      <td>(min-width: 600px)</td>
 *    </tr>
 *    <tr>
 *      <td>sm</td>
 *      <td>(min-width: 600px) and (max-width: 959px)</td>
 *    </tr>
 *    <tr>
 *      <td>gt-sm</td>
 *      <td>(min-width: 960px)</td>
 *    </tr>
 *    <tr>
 *      <td>md</td>
 *      <td>(min-width: 960px) and (max-width: 1279px)</td>
 *    </tr>
 *    <tr>
 *      <td>gt-md</td>
 *      <td>(min-width: 1280px)</td>
 *    </tr>
 *    <tr>
 *      <td>lg</td>
 *      <td>(min-width: 1280px) and (max-width: 1919px)</td>
 *    </tr>
 *    <tr>
 *      <td>gt-lg</td>
 *      <td>(min-width: 1920px)</td>
 *    </tr>
 *    <tr>
 *      <td>xl</td>
 *      <td>(min-width: 1920px)</td>
 *    </tr>
 *    <tr>
 *      <td>landscape</td>
 *      <td>landscape</td>
 *    </tr>
 *    <tr>
 *      <td>portrait</td>
 *      <td>portrait</td>
 *    </tr>
 *    <tr>
 *      <td>print</td>
 *      <td>print</td>
 *    </tr>
 *    </tbody>
 *  </table>
 *
 *  See Material Design's <a href="https://material.google.com/layout/responsive-ui.html">Layout - Adaptive UI</a> for more details.
 *
 *  <a href="https://www.google.com/design/spec/layout/adaptive-ui.html">
 *  <img src="https://material-design.storage.googleapis.com/publish/material_v_4/material_ext_publish/0B8olV15J7abPSGFxemFiQVRtb1k/layout_adaptive_breakpoints_01.png" width="100%" height="100%"></img>
 *  </a>
 *
 * @returns {boolean} a boolean representing whether or not the given media query is true or false.
 *
 * @usage
 * <hljs lang="js">
 * app.controller('MyController', function($mdMedia, $scope) {
 *   $scope.$watch(function() { return $mdMedia('lg'); }, function(big) {
 *     $scope.bigScreen = big;
 *   });
 *
 *   $scope.screenIsSmall = $mdMedia('sm');
 *   $scope.customQuery = $mdMedia('(min-width: 1234px)');
 *   $scope.anotherCustom = $mdMedia('max-width: 300px');
 * });
 * </hljs>
 */

/* ngInject */
function mdMediaFactory($mdConstant, $rootScope, $window) {
  var queries = {};
  var mqls = {};
  var results = {};
  var normalizeCache = {};

  $mdMedia.getResponsiveAttribute = getResponsiveAttribute;
  $mdMedia.getQuery = getQuery;
  $mdMedia.watchResponsiveAttributes = watchResponsiveAttributes;

  return $mdMedia;

  function $mdMedia(query) {
    var validated = queries[query];
    if (angular.isUndefined(validated)) {
      validated = queries[query] = validate(query);
    }

    var result = results[validated];
    if (angular.isUndefined(result)) {
      result = add(validated);
    }

    return result;
  }

  function validate(query) {
    return $mdConstant.MEDIA[query] ||
           ((query.charAt(0) !== '(') ? ('(' + query + ')') : query);
  }

  function add(query) {
    var result = mqls[query];
    if ( !result ) {
      result = mqls[query] = $window.matchMedia(query);
    }

    result.addListener(onQueryChange);
    return (results[result.media] = !!result.matches);
  }

  function onQueryChange(query) {
    $rootScope.$evalAsync(function() {
      results[query.media] = !!query.matches;
    });
  }

  function getQuery(name) {
    return mqls[name];
  }

  function getResponsiveAttribute(attrs, attrName) {
    for (var i = 0; i < $mdConstant.MEDIA_PRIORITY.length; i++) {
      var mediaName = $mdConstant.MEDIA_PRIORITY[i];
      if (!mqls[queries[mediaName]].matches) {
        continue;
      }

      var normalizedName = getNormalizedName(attrs, attrName + '-' + mediaName);
      if (attrs[normalizedName]) {
        return attrs[normalizedName];
      }
    }

    // fallback on unprefixed
    return attrs[getNormalizedName(attrs, attrName)];
  }

  function watchResponsiveAttributes(attrNames, attrs, watchFn) {
    var unwatchFns = [];
    attrNames.forEach(function(attrName) {
      var normalizedName = getNormalizedName(attrs, attrName);
      if (angular.isDefined(attrs[normalizedName])) {
        unwatchFns.push(
            attrs.$observe(normalizedName, angular.bind(void 0, watchFn, null)));
      }

      for (var mediaName in $mdConstant.MEDIA) {
        normalizedName = getNormalizedName(attrs, attrName + '-' + mediaName);
        if (angular.isDefined(attrs[normalizedName])) {
          unwatchFns.push(
              attrs.$observe(normalizedName, angular.bind(void 0, watchFn, mediaName)));
        }
      }
    });

    return function unwatch() {
      unwatchFns.forEach(function(fn) { fn(); });
    };
  }

  // Improves performance dramatically
  function getNormalizedName(attrs, attrName) {
    return normalizeCache[attrName] ||
        (normalizeCache[attrName] = attrs.$normalize(attrName));
  }
}

angular
  .module('material.core')
  .config( ["$provide", function($provide) {
    $provide.decorator('$mdUtil', ['$delegate', function ($delegate) {

      // Inject the prefixer into our original $mdUtil service.
      $delegate.prefixer = MdPrefixer;

      return $delegate;
    }]);
  }]);

function MdPrefixer(initialAttributes, buildSelector) {
  var PREFIXES = ['data', 'x'];

  if (initialAttributes) {
    // The prefixer also accepts attributes as a parameter, and immediately builds a list or selector for
    // the specified attributes.
    return buildSelector ? _buildSelector(initialAttributes) : _buildList(initialAttributes);
  }

  return {
    buildList: _buildList,
    buildSelector: _buildSelector,
    hasAttribute: _hasAttribute,
    removeAttribute: _removeAttribute
  };

  function _buildList(attributes) {
    attributes = angular.isArray(attributes) ? attributes : [attributes];

    attributes.forEach(function(item) {
      PREFIXES.forEach(function(prefix) {
        attributes.push(prefix + '-' + item);
      });
    });

    return attributes;
  }

  function _buildSelector(attributes) {
    attributes = angular.isArray(attributes) ? attributes : [attributes];

    return _buildList(attributes)
      .map(function(item) {
        return '[' + item + ']';
      })
      .join(',');
  }

  function _hasAttribute(element, attribute) {
    element = _getNativeElement(element);

    if (!element) {
      return false;
    }

    var prefixedAttrs = _buildList(attribute);

    for (var i = 0; i < prefixedAttrs.length; i++) {
      if (element.hasAttribute(prefixedAttrs[i])) {
        return true;
      }
    }

    return false;
  }

  function _removeAttribute(element, attribute) {
    element = _getNativeElement(element);

    if (!element) {
      return;
    }

    _buildList(attribute).forEach(function(prefixedAttribute) {
      element.removeAttribute(prefixedAttribute);
    });
  }

  /**
   * Transforms a jqLite or DOM element into a HTML element.
   * This is useful when supporting jqLite elements and DOM elements at
   * same time.
   * @param element {JQLite|Element} Element to be parsed
   * @returns {HTMLElement} Parsed HTMLElement
   */
  function _getNativeElement(element) {
    element =  element[0] || element;

    if (element.nodeType) {
      return element;
    }
  }

}

/*
 * This var has to be outside the angular factory, otherwise when
 * there are multiple material apps on the same page, each app
 * will create its own instance of this array and the app's IDs
 * will not be unique.
 */
UtilFactory['$inject'] = ["$document", "$timeout", "$compile", "$rootScope", "$$mdAnimate", "$interpolate", "$log", "$rootElement", "$window", "$$rAF"];
var nextUniqueId = 0;

/**
 * @ngdoc module
 * @name material.core.util
 * @description
 * Util
 */
angular
  .module('material.core')
  .factory('$mdUtil', UtilFactory);

/**
 * ngInject
 */
function UtilFactory($document, $timeout, $compile, $rootScope, $$mdAnimate, $interpolate, $log, $rootElement, $window, $$rAF) {
  // Setup some core variables for the processTemplate method
  var startSymbol = $interpolate.startSymbol(),
    endSymbol = $interpolate.endSymbol(),
    usesStandardSymbols = ((startSymbol === '{{') && (endSymbol === '}}'));

  /**
   * Checks if the target element has the requested style by key
   * @param {DOMElement|JQLite} target Target element
   * @param {string} key Style key
   * @param {string=} expectedVal Optional expected value
   * @returns {boolean} Whether the target element has the style or not
   */
  var hasComputedStyle = function (target, key, expectedVal) {
    var hasValue = false;

    if ( target && target.length  ) {
      var computedStyles = $window.getComputedStyle(target[0]);
      hasValue = angular.isDefined(computedStyles[key]) && (expectedVal ? computedStyles[key] == expectedVal : true);
    }

    return hasValue;
  };

  function validateCssValue(value) {
    return !value       ? '0'   :
      hasPx(value) || hasPercent(value) ? value : value + 'px';
  }

  function hasPx(value) {
    return String(value).indexOf('px') > -1;
  }

  function hasPercent(value) {
    return String(value).indexOf('%') > -1;

  }

  var $mdUtil = {
    dom: {},
    now: window.performance && window.performance.now ?
      angular.bind(window.performance, window.performance.now) : Date.now || function() {
      return new Date().getTime();
    },

    /**
     * Cross-version compatibility method to retrieve an option of a ngModel controller,
     * which supports the breaking changes in the AngularJS snapshot (SHA 87a2ff76af5d0a9268d8eb84db5755077d27c84c).
     * @param {!angular.ngModelCtrl} ngModelCtrl
     * @param {!string} optionName
     * @returns {Object|undefined}
     */
    getModelOption: function (ngModelCtrl, optionName) {
      if (!ngModelCtrl.$options) {
        return;
      }

      var $options = ngModelCtrl.$options;

      // The newer versions of AngularJS introduced a `getOption function and made the option values no longer
      // visible on the $options object.
      return $options.getOption ? $options.getOption(optionName) : $options[optionName]
    },

    /**
     * Bi-directional accessor/mutator used to easily update an element's
     * property based on the current 'dir'ectional value.
     */
    bidi : function(element, property, lValue, rValue) {
      var ltr = !($document[0].dir == 'rtl' || $document[0].body.dir == 'rtl');

      // If accessor
      if ( arguments.length == 0 ) return ltr ? 'ltr' : 'rtl';

      // If mutator
      var elem = angular.element(element);

      if ( ltr && angular.isDefined(lValue)) {
        elem.css(property, validateCssValue(lValue));
      }
      else if ( !ltr && angular.isDefined(rValue)) {
        elem.css(property, validateCssValue(rValue) );
      }
    },

    bidiProperty: function (element, lProperty, rProperty, value) {
      var ltr = !($document[0].dir == 'rtl' || $document[0].body.dir == 'rtl');

      var elem = angular.element(element);

      if ( ltr && angular.isDefined(lProperty)) {
        elem.css(lProperty, validateCssValue(value));
        elem.css(rProperty, '');
      }
      else if ( !ltr && angular.isDefined(rProperty)) {
        elem.css(rProperty, validateCssValue(value) );
        elem.css(lProperty, '');
      }
    },

    clientRect: function(element, offsetParent, isOffsetRect) {
      var node = getNode(element);
      offsetParent = getNode(offsetParent || node.offsetParent || document.body);
      var nodeRect = node.getBoundingClientRect();

      // The user can ask for an offsetRect: a rect relative to the offsetParent,
      // or a clientRect: a rect relative to the page
      var offsetRect = isOffsetRect ?
        offsetParent.getBoundingClientRect() :
      {left: 0, top: 0, width: 0, height: 0};
      return {
        left: nodeRect.left - offsetRect.left,
        top: nodeRect.top - offsetRect.top,
        width: nodeRect.width,
        height: nodeRect.height
      };
    },
    offsetRect: function(element, offsetParent) {
      return $mdUtil.clientRect(element, offsetParent, true);
    },

    // Annoying method to copy nodes to an array, thanks to IE
    nodesToArray: function(nodes) {
      nodes = nodes || [];

      var results = [];
      for (var i = 0; i < nodes.length; ++i) {
        results.push(nodes.item(i));
      }
      return results;
    },

    /**
     * Determines the absolute position of the viewport.
     * Useful when making client rectangles absolute.
     * @returns {number}
     */
    getViewportTop: function() {
      return window.scrollY || window.pageYOffset || 0;
    },

    /**
     * Finds the proper focus target by searching the DOM.
     *
     * @param containerEl
     * @param attributeVal
     * @returns {*}
     */
    findFocusTarget: function(containerEl, attributeVal) {
      var AUTO_FOCUS = this.prefixer('md-autofocus', true);
      var elToFocus;

      elToFocus = scanForFocusable(containerEl, attributeVal || AUTO_FOCUS);

      if ( !elToFocus && attributeVal != AUTO_FOCUS) {
        // Scan for deprecated attribute
        elToFocus = scanForFocusable(containerEl, this.prefixer('md-auto-focus', true));

        if ( !elToFocus ) {
          // Scan for fallback to 'universal' API
          elToFocus = scanForFocusable(containerEl, AUTO_FOCUS);
        }
      }

      return elToFocus;

      /**
       * Can target and nested children for specified Selector (attribute)
       * whose value may be an expression that evaluates to True/False.
       */
      function scanForFocusable(target, selector) {
        var elFound, items = target[0].querySelectorAll(selector);

        // Find the last child element with the focus attribute
        if ( items && items.length ){
          items.length && angular.forEach(items, function(it) {
            it = angular.element(it);

            // Check the element for the md-autofocus class to ensure any associated expression
            // evaluated to true.
            var isFocusable = it.hasClass('md-autofocus');
            if (isFocusable) elFound = it;
          });
        }
        return elFound;
      }
    },

    /**
     * Disables scroll around the passed parent element.
     * @param element Unused
     * @param {!Element|!angular.JQLite} parent Element to disable scrolling within.
     *   Defaults to body if none supplied.
     * @param options Object of options to modify functionality
     *   - disableScrollMask Boolean of whether or not to create a scroll mask element or
     *     use the passed parent element.
     */
    disableScrollAround: function(element, parent, options) {
      options = options || {};

      $mdUtil.disableScrollAround._count = Math.max(0, $mdUtil.disableScrollAround._count || 0);
      $mdUtil.disableScrollAround._count++;

      if ($mdUtil.disableScrollAround._restoreScroll) {
        return $mdUtil.disableScrollAround._restoreScroll;
      }

      var body = $document[0].body;
      var restoreBody = disableBodyScroll();
      var restoreElement = disableElementScroll(parent);

      return $mdUtil.disableScrollAround._restoreScroll = function() {
        if (--$mdUtil.disableScrollAround._count <= 0) {
          restoreBody();
          restoreElement();
          delete $mdUtil.disableScrollAround._restoreScroll;
        }
      };

      /**
       * Creates a virtual scrolling mask to prevent touchmove, keyboard, scrollbar clicking,
       * and wheel events
       */
      function disableElementScroll(element) {
        element = angular.element(element || body);

        var scrollMask;

        if (options.disableScrollMask) {
          scrollMask = element;
        } else {
          scrollMask = angular.element(
            '<div class="md-scroll-mask">' +
            '  <div class="md-scroll-mask-bar"></div>' +
            '</div>');
          element.append(scrollMask);
        }

        scrollMask.on('wheel', preventDefault);
        scrollMask.on('touchmove', preventDefault);

        return function restoreElementScroll() {
          scrollMask.off('wheel');
          scrollMask.off('touchmove');

          if (!options.disableScrollMask && scrollMask[0].parentNode ) {
            scrollMask[0].parentNode.removeChild(scrollMask[0]);
          }
        };

        function preventDefault(e) {
          e.preventDefault();
        }
      }

      // Converts the body to a position fixed block and translate it to the proper scroll position
      function disableBodyScroll() {
        var documentElement = $document[0].documentElement;

        var prevDocumentStyle = documentElement.style.cssText || '';
        var prevBodyStyle = body.style.cssText || '';

        var viewportTop = $mdUtil.getViewportTop();
        var clientWidth = body.clientWidth;
        var hasVerticalScrollbar = body.scrollHeight > body.clientHeight + 1;

        // Scroll may be set on <html> element (for example by overflow-y: scroll)
        // but Chrome is reporting the scrollTop position always on <body>.
        // scrollElement will allow to restore the scrollTop position to proper target.
        var scrollElement = documentElement.scrollTop > 0 ? documentElement : body;

        if (hasVerticalScrollbar) {
          angular.element(body).css({
            position: 'fixed',
            width: '100%',
            top: -viewportTop + 'px'
          });
        }

        if (body.clientWidth < clientWidth) {
          body.style.overflow = 'hidden';
        }

        // This should be applied after the manipulation to the body, because
        // adding a scrollbar can potentially resize it, causing the measurement
        // to change.
        if (hasVerticalScrollbar) {
          documentElement.style.overflowY = 'scroll';
        }

        return function restoreScroll() {
          // Reset the inline style CSS to the previous.
          body.style.cssText = prevBodyStyle;
          documentElement.style.cssText = prevDocumentStyle;

          // The scroll position while being fixed
          scrollElement.scrollTop = viewportTop;
        };
      }

    },

    enableScrolling: function() {
      var restoreFn = this.disableScrollAround._restoreScroll;
      restoreFn && restoreFn();
    },

    floatingScrollbars: function() {
      if (this.floatingScrollbars.cached === undefined) {
        var tempNode = angular.element('<div><div></div></div>').css({
          width: '100%',
          'z-index': -1,
          position: 'absolute',
          height: '35px',
          'overflow-y': 'scroll'
        });
        tempNode.children().css('height', '60px');

        $document[0].body.appendChild(tempNode[0]);
        this.floatingScrollbars.cached = (tempNode[0].offsetWidth == tempNode[0].childNodes[0].offsetWidth);
        tempNode.remove();
      }
      return this.floatingScrollbars.cached;
    },

    // Mobile safari only allows you to set focus in click event listeners...
    forceFocus: function(element) {
      var node = element[0] || element;

      document.addEventListener('click', function focusOnClick(ev) {
        if (ev.target === node && ev.$focus) {
          node.focus();
          ev.stopImmediatePropagation();
          ev.preventDefault();
          node.removeEventListener('click', focusOnClick);
        }
      }, true);

      var newEvent = document.createEvent('MouseEvents');
      newEvent.initMouseEvent('click', false, true, window, {}, 0, 0, 0, 0,
        false, false, false, false, 0, null);
      newEvent.$material = true;
      newEvent.$focus = true;
      node.dispatchEvent(newEvent);
    },

    /**
     * facade to build md-backdrop element with desired styles
     * NOTE: Use $compile to trigger backdrop postLink function
     */
    createBackdrop: function(scope, addClass) {
      return $compile($mdUtil.supplant('<md-backdrop class="{0}">', [addClass]))(scope);
    },

    /**
     * supplant() method from Crockford's `Remedial Javascript`
     * Equivalent to use of $interpolate; without dependency on
     * interpolation symbols and scope. Note: the '{<token>}' can
     * be property names, property chains, or array indices.
     */
    supplant: function(template, values, pattern) {
      pattern = pattern || /\{([^{}]*)\}/g;
      return template.replace(pattern, function(a, b) {
        var p = b.split('.'),
          r = values;
        try {
          for (var s in p) {
            if (p.hasOwnProperty(s) ) {
              r = r[p[s]];
            }
          }
        } catch (e) {
          r = a;
        }
        return (typeof r === 'string' || typeof r === 'number') ? r : a;
      });
    },

    fakeNgModel: function() {
      return {
        $fake: true,
        $setTouched: angular.noop,
        $setViewValue: function(value) {
          this.$viewValue = value;
          this.$render(value);
          this.$viewChangeListeners.forEach(function(cb) {
            cb();
          });
        },
        $isEmpty: function(value) {
          return ('' + value).length === 0;
        },
        $parsers: [],
        $formatters: [],
        $viewChangeListeners: [],
        $render: angular.noop
      };
    },

    // Returns a function, that, as long as it continues to be invoked, will not
    // be triggered. The function will be called after it stops being called for
    // N milliseconds.
    // @param wait Integer value of msecs to delay (since last debounce reset); default value 10 msecs
    // @param invokeApply should the $timeout trigger $digest() dirty checking
    debounce: function(func, wait, scope, invokeApply) {
      var timer;

      return function debounced() {
        var context = scope,
          args = Array.prototype.slice.call(arguments);

        $timeout.cancel(timer);
        timer = $timeout(function() {

          timer = undefined;
          func.apply(context, args);

        }, wait || 10, invokeApply);
      };
    },

    // Returns a function that can only be triggered every `delay` milliseconds.
    // In other words, the function will not be called unless it has been more
    // than `delay` milliseconds since the last call.
    throttle: function throttle(func, delay) {
      var recent;
      return function throttled() {
        var context = this;
        var args = arguments;
        var now = $mdUtil.now();

        if (!recent || (now - recent > delay)) {
          func.apply(context, args);
          recent = now;
        }
      };
    },

    /**
     * Measures the number of milliseconds taken to run the provided callback
     * function. Uses a high-precision timer if available.
     */
    time: function time(cb) {
      var start = $mdUtil.now();
      cb();
      return $mdUtil.now() - start;
    },

    /**
     * Create an implicit getter that caches its `getter()`
     * lookup value
     */
    valueOnUse : function (scope, key, getter) {
      var value = null, args = Array.prototype.slice.call(arguments);
      var params = (args.length > 3) ? args.slice(3) : [ ];

      Object.defineProperty(scope, key, {
        get: function () {
          if (value === null) value = getter.apply(scope, params);
          return value;
        }
      });
    },

    /**
     * Get a unique ID.
     *
     * @returns {string} an unique numeric string
     */
    nextUid: function() {
      return '' + nextUniqueId++;
    },

    // Stop watchers and events from firing on a scope without destroying it,
    // by disconnecting it from its parent and its siblings' linked lists.
    disconnectScope: function disconnectScope(scope) {
      if (!scope) return;

      // we can't destroy the root scope or a scope that has been already destroyed
      if (scope.$root === scope) return;
      if (scope.$$destroyed) return;

      var parent = scope.$parent;
      scope.$$disconnected = true;

      // See Scope.$destroy
      if (parent.$$childHead === scope) parent.$$childHead = scope.$$nextSibling;
      if (parent.$$childTail === scope) parent.$$childTail = scope.$$prevSibling;
      if (scope.$$prevSibling) scope.$$prevSibling.$$nextSibling = scope.$$nextSibling;
      if (scope.$$nextSibling) scope.$$nextSibling.$$prevSibling = scope.$$prevSibling;

      scope.$$nextSibling = scope.$$prevSibling = null;

    },

    // Undo the effects of disconnectScope above.
    reconnectScope: function reconnectScope(scope) {
      if (!scope) return;

      // we can't disconnect the root node or scope already disconnected
      if (scope.$root === scope) return;
      if (!scope.$$disconnected) return;

      var child = scope;

      var parent = child.$parent;
      child.$$disconnected = false;
      // See Scope.$new for this logic...
      child.$$prevSibling = parent.$$childTail;
      if (parent.$$childHead) {
        parent.$$childTail.$$nextSibling = child;
        parent.$$childTail = child;
      } else {
        parent.$$childHead = parent.$$childTail = child;
      }
    },

    /*
     * getClosest replicates jQuery.closest() to walk up the DOM tree until it finds a matching nodeName
     *
     * @param el Element to start walking the DOM from
     * @param check Either a string or a function. If a string is passed, it will be evaluated against
     * each of the parent nodes' tag name. If a function is passed, the loop will call it with each of
     * the parents and will use the return value to determine whether the node is a match.
     * @param onlyParent Only start checking from the parent element, not `el`.
     */
    getClosest: function getClosest(el, validateWith, onlyParent) {
      if ( angular.isString(validateWith) ) {
        var tagName = validateWith.toUpperCase();
        validateWith = function(el) {
          return el.nodeName.toUpperCase() === tagName;
        };
      }

      if (el instanceof angular.element) el = el[0];
      if (onlyParent) el = el.parentNode;
      if (!el) return null;

      do {
        if (validateWith(el)) {
          return el;
        }
      } while (el = el.parentNode);

      return null;
    },

    /**
     * Build polyfill for the Node.contains feature (if needed)
     */
    elementContains: function(node, child) {
      var hasContains = (window.Node && window.Node.prototype && Node.prototype.contains);
      var findFn = hasContains ? angular.bind(node, node.contains) : angular.bind(node, function(arg) {
        // compares the positions of two nodes and returns a bitmask
        return (node === child) || !!(this.compareDocumentPosition(arg) & 16)
      });

      return findFn(child);
    },

    /**
     * Functional equivalent for $element.filter(‘md-bottom-sheet’)
     * useful with interimElements where the element and its container are important...
     *
     * @param {[]} elements to scan
     * @param {string} name of node to find (e.g. 'md-dialog')
     * @param {boolean=} optional flag to allow deep scans; defaults to 'false'.
     * @param {boolean=} optional flag to enable log warnings; defaults to false
     */
    extractElementByName: function(element, nodeName, scanDeep, warnNotFound) {
      var found = scanTree(element);
      if (!found && !!warnNotFound) {
        $log.warn( $mdUtil.supplant("Unable to find node '{0}' in element '{1}'.",[nodeName, element[0].outerHTML]) );
      }

      return angular.element(found || element);

      /**
       * Breadth-First tree scan for element with matching `nodeName`
       */
      function scanTree(element) {
        return scanLevel(element) || (scanDeep ? scanChildren(element) : null);
      }

      /**
       * Case-insensitive scan of current elements only (do not descend).
       */
      function scanLevel(element) {
        if ( element ) {
          for (var i = 0, len = element.length; i < len; i++) {
            if (element[i].nodeName.toLowerCase() === nodeName) {
              return element[i];
            }
          }
        }
        return null;
      }

      /**
       * Scan children of specified node
       */
      function scanChildren(element) {
        var found;
        if ( element ) {
          for (var i = 0, len = element.length; i < len; i++) {
            var target = element[i];
            if ( !found ) {
              for (var j = 0, numChild = target.childNodes.length; j < numChild; j++) {
                found = found || scanTree([target.childNodes[j]]);
              }
            }
          }
        }
        return found;
      }

    },

    /**
     * Give optional properties with no value a boolean true if attr provided or false otherwise
     */
    initOptionalProperties: function(scope, attr, defaults) {
      defaults = defaults || {};
      angular.forEach(scope.$$isolateBindings, function(binding, key) {
        if (binding.optional && angular.isUndefined(scope[key])) {
          var attrIsDefined = angular.isDefined(attr[binding.attrName]);
          scope[key] = angular.isDefined(defaults[key]) ? defaults[key] : attrIsDefined;
        }
      });
    },

    /**
     * Alternative to $timeout calls with 0 delay.
     * nextTick() coalesces all calls within a single frame
     * to minimize $digest thrashing
     *
     * @param callback
     * @param digest
     * @returns {*}
     */
    nextTick: function(callback, digest, scope) {
      //-- grab function reference for storing state details
      var nextTick = $mdUtil.nextTick;
      var timeout = nextTick.timeout;
      var queue = nextTick.queue || [];

      //-- add callback to the queue
      queue.push({scope: scope, callback: callback});

      //-- set default value for digest
      if (digest == null) digest = true;

      //-- store updated digest/queue values
      nextTick.digest = nextTick.digest || digest;
      nextTick.queue = queue;

      //-- either return existing timeout or create a new one
      return timeout || (nextTick.timeout = $timeout(processQueue, 0, false));

      /**
       * Grab a copy of the current queue
       * Clear the queue for future use
       * Process the existing queue
       * Trigger digest if necessary
       */
      function processQueue() {
        var queue = nextTick.queue;
        var digest = nextTick.digest;

        nextTick.queue = [];
        nextTick.timeout = null;
        nextTick.digest = false;

        queue.forEach(functi