/**
 * @license AngularJS v1.6.5
 * (c) 2010-2017 Google, Inc. http://angularjs.org
 * License: MIT
 */
(function (window, angular) {
    '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`, `ngChecked`, `ngReadonly`, `ngRequired`, `ngValue`, `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:ngModel ngModel}        | aria-checked, aria-valuemin, aria-valuemax, aria-valuenow, aria-invalid, aria-required, input roles |
     * | {@link ng.directive:ngDisabled ngDisabled}  | aria-disabled                                                                                       |
     * | {@link ng.directive:ngRequired ngRequired}  | aria-required                                                                                       |
     * | {@link ng.directive:ngChecked ngChecked}    | aria-checked                                                                                        |
     * | {@link ng.directive:ngReadonly ngReadonly}  | aria-readonly                                                                                       |
     * | {@link ng.directive:ngValue ngValue}        | aria-checked                                                                                        |
     * | {@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:ngClick ngClick}        | tabindex, keydown 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.$ariaProvider#config config} method. For more details, see the
     * {@link guide/accessibility Developer Guide}.
     */
    var ngAriaModule = angular.module('ngAria', ['ng']).info({angularVersion: '1.6.5'}).provider('$aria', $AriaProvider);

    /**
     * Internal Utilities
     */
    var nodeBlackList = ['BUTTON', 'A', 'INPUT', 'TEXTAREA', 'SELECT', 'DETAILS', 'SUMMARY'];

    var isNodeOneOf = function (elem, nodeTypeArray) {
        if (nodeTypeArray.indexOf(elem[0].nodeName) !== -1) {
            return true;
        }
    };

    /**
     * @ngdoc provider
     * @name $ariaProvider
     * @this
     *
     * @description
     *
     * Used for configuring the ARIA attributes injected and managed by ngAria.
     *
     * ```js
     * angular.module('myApp', ['ngAria'], function config($ariaProvider) {
     *   $ariaProvider.config({
     *     ariaValue: true,
     *     tabindex: false
     *   });
     * });
     *```
     *
     * ## Dependencies
     * Requires the {@link ngAria} module to be installed.
     *
     */
    function $AriaProvider() {
        var config = {
            ariaHidden: true,
            ariaChecked: true,
            ariaReadonly: true,
            ariaDisabled: true,
            ariaRequired: true,
            ariaInvalid: true,
            ariaValue: true,
            tabindex: true,
            bindKeydown: 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
         *  - **ariaReadonly** – `{boolean}` – Enables/disables aria-readonly tags
         *  - **ariaDisabled** – `{boolean}` – Enables/disables aria-disabled tags
         *  - **ariaRequired** – `{boolean}` – Enables/disables aria-required tags
         *  - **ariaInvalid** – `{boolean}` – Enables/disables aria-invalid tags
         *  - **ariaValue** – `{boolean}` – Enables/disables aria-valuemin, aria-valuemax and
         *    aria-valuenow tags
         *  - **tabindex** – `{boolean}` – Enables/disables tabindex tags
         *  - **bindKeydown** – `{boolean}` – Enables/disables keyboard event binding on non-interactive
         *    elements (such as `div` or `li`) using ng-click, making them more accessible to users of
         *    assistive technologies
         *  - **bindRoleForClick** – `{boolean}` – Adds role=button to non-interactive elements (such as
         *    `div` or `li`) 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, nodeBlackList, negate) {
            return function (scope, elem, attr) {
                var ariaCamelName = attr.$normalize(ariaAttr);
                if (config[ariaCamelName] && !isNodeOneOf(elem, nodeBlackList) && !attr[ariaCamelName]) {
                    scope.$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.$$watchExpr('ngDisabled', 'aria-disabled', nodeBlackList, false);
         * }])
         *```
         * Shown above, the ngAria module creates a directive with the same signature as the
         * traditional `ng-disabled` directive. But this ngAria version is dedicated to
         * solely managing accessibility attributes on custom elements. The internal `$aria` service is
         * used to watch the boolean attribute `ngDisabled`. If it has not been explicitly set by the
         * developer, `aria-disabled` is injected as an attribute with its value synchronized to the
         * value in `ngDisabled`.
         *
         * Because ngAria hooks into the `ng-disabled` directive, developers do not have to do
         * anything to enable this feature. The `aria-disabled` attribute is automatically managed
         * simply as a silent side-effect of using `ng-disabled` with the ngAria module.
         *
         * The full list of directives that interface with ngAria:
         * * **ngModel**
         * * **ngChecked**
         * * **ngReadonly**
         * * **ngRequired**
         * * **ngDisabled**
         * * **ngValue**
         * * **ngShow**
         * * **ngHide**
         * * **ngClick**
         * * **ngDblclick**
         * * **ngMessages**
         *
         * Read the {@link guide/accessibility ngAria Developer Guide} for a thorough explanation of each
         * directive.
         *
         *
         * ## Dependencies
         * Requires the {@link ngAria} module to be installed.
         */
        this.$get = function () {
            return {
                config: function (key) {
                    return config[key];
                },
                $$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('ngValue', ['$aria', function ($aria) {
            return $aria.$$watchExpr('ngValue', 'aria-checked', nodeBlackList, false);
        }])
        .directive('ngChecked', ['$aria', function ($aria) {
            return $aria.$$watchExpr('ngChecked', 'aria-checked', nodeBlackList, false);
        }])
        .directive('ngReadonly', ['$aria', function ($aria) {
            return $aria.$$watchExpr('ngReadonly', 'aria-readonly', nodeBlackList, false);
        }])
        .directive('ngRequired', ['$aria', function ($aria) {
            return $aria.$$watchExpr('ngRequired', 'aria-required', nodeBlackList, false);
        }])
        .directive('ngModel', ['$aria', function ($aria) {

            function shouldAttachAttr(attr, normalizedAttr, elem, allowBlacklistEls) {
                return $aria.config(normalizedAttr) && !elem.attr(attr) && (allowBlacklistEls || !isNodeOneOf(elem, nodeBlackList));
            }

            function shouldAttachRole(role, elem) {
                // if element does not have role attribute
                // AND element type is equal to role (if custom element has a type equaling shape) <-- remove?
                // AND element is not in nodeBlackList
                return !elem.attr('role') && (elem.attr('type') === role) && !isNodeOneOf(elem, nodeBlackList);
            }

            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' : '';
            }

            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 {
                        post: function (scope, elem, attr, ngModel) {
                            var needsTabIndex = shouldAttachAttr('tabindex', 'tabindex', elem, false);

                            function ngAriaWatchModelValue() {
                                return ngModel.$modelValue;
                            }

                            function getRadioReaction(newVal) {
                                // Strict comparison would cause a BC
                                // eslint-disable-next-line eqeqeq
                                var boolVal = (attr.value == ngModel.$viewValue);
                                elem.attr('aria-checked', boolVal);
                            }

                            function getCheckboxReaction() {
                                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, false)) {
                                        scope.$watch(ngAriaWatchModelValue, shape === 'radio' ?
                                            getRadioReaction : getCheckboxReaction);
                                    }
                                    if (needsTabIndex) {
                                        elem.attr('tabindex', 0);
                                    }
                                    break;
                                case 'range':
                                    if (shouldAttachRole(shape, elem)) {
                                        elem.attr('role', 'slider');
                                    }
                                    if ($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);
                                            });
                                        }
                                    }
                                    if (needsTabIndex) {
                                        elem.attr('tabindex', 0);
                                    }
                                    break;
                            }

                            if (!attr.hasOwnProperty('ngRequired') && ngModel.$validators.required
                                && shouldAttachAttr('aria-required', 'ariaRequired', elem, false)) {
                                // ngModel.$error.required is undefined on custom controls
                                attr.$observe('required', function () {
                                    elem.attr('aria-required', !!attr['required']);
                                });
                            }

                            if (shouldAttachAttr('aria-invalid', 'ariaInvalid', elem, true)) {
                                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', nodeBlackList, false);
        }])
        .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);
                    return function (scope, elem, attr) {

                        if (!isNodeOneOf(elem, nodeBlackList)) {

                            if ($aria.config('bindRoleForClick') && !elem.attr('role')) {
                                elem.attr('role', 'button');
                            }

                            if ($aria.config('tabindex') && !elem.attr('tabindex')) {
                                elem.attr('tabindex', 0);
                            }

                            if ($aria.config('bindKeydown') && !attr.ngKeydown && !attr.ngKeypress && !attr.ngKeyup) {
                                elem.on('keydown', function (event) {
                                    var keyCode = event.which || event.keyCode;
                                    if (keyCode === 32 || keyCode === 13) {
                                        scope.$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') && !isNodeOneOf(elem, nodeBlackList)) {
                    elem.attr('tabindex', 0);
                }
            };
        }]);


})(window, window.angular);