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File: FrontEndScripts/libs/angular/angular-aria.js

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File: FrontEndScripts/libs/angular/angular-aria.js
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/** * @license AngularJS v1.4.3 * (c) 2010-2015 Google, Inc. http://angularjs.org * License: MIT */ (function(window, angular, undefined) {'use strict'; /** * @ngdoc module * @name ngAria * @description * * The `ngAria` module provides support for common * [<abbr title="Accessible Rich Internet Applications">ARIA</abbr>](http://www.w3.org/TR/wai-aria/) * attributes that convey state or semantic information about the application for users * of assistive technologies, such as screen readers. * * <div doc-module-components="ngAria"></div> * * ## Usage * * For ngAria to do its magic, simply include the module `ngAria` as a dependency. The following * directives are supported: * `ngModel`, `ngDisabled`, `ngShow`, `ngHide`, `ngClick`, `ngDblClick`, and `ngMessages`. * * Below is a more detailed breakdown of the attributes handled by ngAria: * * | Directive | Supported Attributes | * |---------------------------------------------|----------------------------------------------------------------------------------------| * | {@link ng.directive:ngDisabled ngDisabled} | aria-disabled | * | {@link ng.directive:ngShow ngShow} | aria-hidden | * | {@link ng.directive:ngHide ngHide} | aria-hidden | * | {@link ng.directive:ngDblclick ngDblclick} | tabindex | * | {@link module:ngMessages ngMessages} | aria-live | * | {@link ng.directive:ngModel ngModel} | aria-checked, aria-valuemin, aria-valuemax, aria-valuenow, aria-invalid, aria-required, input roles | * | {@link ng.directive:ngClick ngClick} | tabindex, keypress event, button role | * * Find out more information about each directive by reading the * {@link guide/accessibility ngAria Developer Guide}. * * ##Example * Using ngDisabled with ngAria: * ```html * <md-checkbox ng-disabled="disabled"> * ``` * Becomes: * ```html * <md-checkbox ng-disabled="disabled" aria-disabled="true"> * ``` * * ##Disabling Attributes * It's possible to disable individual attributes added by ngAria with the * {@link ngAria.$ariaProvider#config config} method. For more details, see the * {@link guide/accessibility Developer Guide}. */ /* global -ngAriaModule */ var ngAriaModule = angular.module('ngAria', ['ng']). provider('$aria', $AriaProvider); /** * @ngdoc provider * @name $ariaProvider * * @description * * Used for configuring the ARIA attributes injected and managed by ngAria. * * ```js * angular.module('myApp', ['ngAria'], function config($ariaProvider) { * $ariaProvider.config({ * ariaValue: true, * tabindex: false * }); * }); *``` * * ## Dependencies * Requires the {@link ngAria} module to be installed. * */ function $AriaProvider() { var config = { ariaHidden: true, ariaChecked: true, ariaDisabled: true, ariaRequired: true, ariaInvalid: true, ariaMultiline: true, ariaValue: true, tabindex: true, bindKeypress: true, bindRoleForClick: true }; /** * @ngdoc method * @name $ariaProvider#config * * @param {object} config object to enable/disable specific ARIA attributes * * - **ariaHidden** ? `{boolean}` ? Enables/disables aria-hidden tags * - **ariaChecked** ? `{boolean}` ? Enables/disables aria-checked tags * - **ariaDisabled** ? `{boolean}` ? Enables/disables aria-disabled tags * - **ariaRequired** ? `{boolean}` ? Enables/disables aria-required tags * - **ariaInvalid** ? `{boolean}` ? Enables/disables aria-invalid tags * - **ariaMultiline** ? `{boolean}` ? Enables/disables aria-multiline tags * - **ariaValue** ? `{boolean}` ? Enables/disables aria-valuemin, aria-valuemax and aria-valuenow tags * - **tabindex** ? `{boolean}` ? Enables/disables tabindex tags * - **bindKeypress** ? `{boolean}` ? Enables/disables keypress event binding on `&lt;div&gt;` and * `&lt;li&gt;` elements with ng-click * - **bindRoleForClick** ? `{boolean}` ? Adds role=button to non-interactive elements like `div` * using ng-click, making them more accessible to users of assistive technologies * * @description * Enables/disables various ARIA attributes */ this.config = function(newConfig) { config = angular.extend(config, newConfig); }; function watchExpr(attrName, ariaAttr, negate) { return function(scope, elem, attr) { var ariaCamelName = attr.$normalize(ariaAttr); if (config[ariaCamelName] && !attr[ariaCamelName]) { scope.$watch(attr[attrName], function(boolVal) { // ensure boolean value boolVal = negate ? !boolVal : !!boolVal; elem.attr(ariaAttr, boolVal); }); } }; } /** * @ngdoc service * @name $aria * * @description * @priority 200 * * The $aria service contains helper methods for applying common * [ARIA](http://www.w3.org/TR/wai-aria/) attributes to HTML directives. * * ngAria injects common accessibility attributes that tell assistive technologies when HTML * elements are enabled, selected, hidden, and more. To see how this is performed with ngAria, * let's review a code snippet from ngAria itself: * *```js * ngAriaModule.directive('ngDisabled', ['$aria', function($aria) { * return $aria.$$watchExpr('ngDisabled', 'aria-disabled'); * }]) *``` * Shown above, the ngAria module creates a directive with the same signature as the * traditional `ng-disabled` directive. But this ngAria version is dedicated to * solely managing accessibility attributes. The internal `$aria` service is used to watch the * boolean attribute `ngDisabled`. If it has not been explicitly set by the developer, * `aria-disabled` is injected as an attribute with its value synchronized to the value in * `ngDisabled`. * * Because ngAria hooks into the `ng-disabled` directive, developers do not have to do * anything to enable this feature. The `aria-disabled` attribute is automatically managed * simply as a silent side-effect of using `ng-disabled` with the ngAria module. * * The full list of directives that interface with ngAria: * * **ngModel** * * **ngShow** * * **ngHide** * * **ngClick** * * **ngDblclick** * * **ngMessages** * * **ngDisabled** * * Read the {@link guide/accessibility ngAria Developer Guide} for a thorough explanation of each * directive. * * * ## Dependencies * Requires the {@link ngAria} module to be installed. */ this.$get = function() { return { config: function(key) { return config[key]; }, $$watchExpr: watchExpr }; }; } ngAriaModule.directive('ngShow', ['$aria', function($aria) { return $aria.$$watchExpr('ngShow', 'aria-hidden', true); }]) .directive('ngHide', ['$aria', function($aria) { return $aria.$$watchExpr('ngHide', 'aria-hidden', false); }]) .directive('ngModel', ['$aria', function($aria) { function shouldAttachAttr(attr, normalizedAttr, elem) { return $aria.config(normalizedAttr) && !elem.attr(attr); } function shouldAttachRole(role, elem) { return !elem.attr('role') && (elem.attr('type') === role) && (elem[0].nodeName !== 'INPUT'); } function getShape(attr, elem) { var type = attr.type, role = attr.role; return ((type || role) === 'checkbox' || role === 'menuitemcheckbox') ? 'checkbox' : ((type || role) === 'radio' || role === 'menuitemradio') ? 'radio' : (type === 'range' || role === 'progressbar' || role === 'slider') ? 'range' : (type || role) === 'textbox' || elem[0].nodeName === 'TEXTAREA' ? 'multiline' : ''; } return { restrict: 'A', require: '?ngModel', priority: 200, //Make sure watches are fired after any other directives that affect the ngModel value compile: function(elem, attr) { var shape = getShape(attr, elem); return { pre: function(scope, elem, attr, ngModel) { if (shape === 'checkbox' && attr.type !== 'checkbox') { //Use the input[checkbox] $isEmpty implementation for elements with checkbox roles ngModel.$isEmpty = function(value) { return value === false; }; } }, post: function(scope, elem, attr, ngModel) { var needsTabIndex = shouldAttachAttr('tabindex', 'tabindex', elem); function ngAriaWatchModelValue() { return ngModel.$modelValue; } function getRadioReaction() { if (needsTabIndex) { needsTabIndex = false; return function ngAriaRadioReaction(newVal) { var boolVal = (attr.value == ngModel.$viewValue); elem.attr('aria-checked', boolVal); elem.attr('tabindex', 0 - !boolVal); }; } else { return function ngAriaRadioReaction(newVal) { elem.attr('aria-checked', (attr.value == ngModel.$viewValue)); }; } } function ngAriaCheckboxReaction() { elem.attr('aria-checked', !ngModel.$isEmpty(ngModel.$viewValue)); } switch (shape) { case 'radio': case 'checkbox': if (shouldAttachRole(shape, elem)) { elem.attr('role', shape); } if (shouldAttachAttr('aria-checked', 'ariaChecked', elem)) { scope.$watch(ngAriaWatchModelValue, shape === 'radio' ? getRadioReaction() : ngAriaCheckboxReaction); } break; case 'range': if (shouldAttachRole(shape, elem)) { elem.attr('role', 'slider'); } if ($aria.config('ariaValue')) { var needsAriaValuemin = !elem.attr('aria-valuemin') && (attr.hasOwnProperty('min') || attr.hasOwnProperty('ngMin')); var needsAriaValuemax = !elem.attr('aria-valuemax') && (attr.hasOwnProperty('max') || attr.hasOwnProperty('ngMax')); var needsAriaValuenow = !elem.attr('aria-valuenow'); if (needsAriaValuemin) { attr.$observe('min', function ngAriaValueMinReaction(newVal) { elem.attr('aria-valuemin', newVal); }); } if (needsAriaValuemax) { attr.$observe('max', function ngAriaValueMinReaction(newVal) { elem.attr('aria-valuemax', newVal); }); } if (needsAriaValuenow) { scope.$watch(ngAriaWatchModelValue, function ngAriaValueNowReaction(newVal) { elem.attr('aria-valuenow', newVal); }); } } break; case 'multiline': if (shouldAttachAttr('aria-multiline', 'ariaMultiline', elem)) { elem.attr('aria-multiline', true); } break; } if (needsTabIndex) { elem.attr('tabindex', 0); } if (ngModel.$validators.required && shouldAttachAttr('aria-required', 'ariaRequired', elem)) { scope.$watch(function ngAriaRequiredWatch() { return ngModel.$error.required; }, function ngAriaRequiredReaction(newVal) { elem.attr('aria-required', !!newVal); }); } if (shouldAttachAttr('aria-invalid', 'ariaInvalid', elem)) { scope.$watch(function ngAriaInvalidWatch() { return ngModel.$invalid; }, function ngAriaInvalidReaction(newVal) { elem.attr('aria-invalid', !!newVal); }); } } }; } }; }]) .directive('ngDisabled', ['$aria', function($aria) { return $aria.$$watchExpr('ngDisabled', 'aria-disabled'); }]) .directive('ngMessages', function() { return { restrict: 'A', require: '?ngMessages', link: function(scope, elem, attr, ngMessages) { if (!elem.attr('aria-live')) { elem.attr('aria-live', 'assertive'); } } }; }) .directive('ngClick',['$aria', '$parse', function($aria, $parse) { return { restrict: 'A', compile: function(elem, attr) { var fn = $parse(attr.ngClick, /* interceptorFn */ null, /* expensiveChecks */ true); return function(scope, elem, attr) { var nodeBlackList = ['BUTTON', 'A', 'INPUT', 'TEXTAREA']; function isNodeOneOf(elem, nodeTypeArray) { if (nodeTypeArray.indexOf(elem[0].nodeName) !== -1) { return true; } } if ($aria.config('bindRoleForClick') && !elem.attr('role') && !isNodeOneOf(elem, nodeBlackList)) { elem.attr('role', 'button'); } if ($aria.config('tabindex') && !elem.attr('tabindex')) { elem.attr('tabindex', 0); } if ($aria.config('bindKeypress') && !attr.ngKeypress && !isNodeOneOf(elem, nodeBlackList)) { elem.on('keypress', function(event) { var keyCode = event.which || event.keyCode; if (keyCode === 32 || keyCode === 13) { scope.$apply(callback); } function callback() { fn(scope, { $event: event }); } }); } }; } }; }]) .directive('ngDblclick', ['$aria', function($aria) { return function(scope, elem, attr) { if ($aria.config('tabindex') && !elem.attr('tabindex')) { elem.attr('tabindex', 0); } }; }]); })(window, window.angular);