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angular.module('localytics.directives', []) angular.module('localytics.directives').directive 'chosen', ['$timeout', ($timeout) -> # This is stolen from Angular... NG_OPTIONS_REGEXP = /^\s([\s\S]+?)(?:\s+as\s+([\s\S]+?))?(?:\s+group\s+by\s+([\s\S]+?))?\s+for\s+(?:([\$\w][\$\w])\|(?:$\s([\$\w][\$\w])\s,\s([\$\w][\$\w])\s$))\s+in\s+([\s\S]+?)(?:\s+track\s+by\s+([\s\S]+?))?$/ # Whitelist of options that will be parsed from the element's attributes and passed into Chosen CHOSEN_OPTION_WHITELIST = [ 'persistentCreateOption' 'createOptionText' 'createOption' 'skipNoResults' 'noResultsText' 'allowSingleDeselect' 'disableSearchThreshold' 'disableSearch' 'enableSplitWordSearch' 'inheritSelectClasses' 'maxSelectedOptions' 'placeholderTextMultiple' 'placeholderTextSingle' 'searchContains' 'singleBackstrokeDelete' 'displayDisabledOptions' 'displaySelectedOptions' 'width' 'includeGroupLabelInSelected' 'maxShownResults' ] snakeCase = (input) -> input.replace /[A-Z]/g, ($1) -> "_#{$1.toLowerCase()}" isEmpty = (value) -> if angular.isArray(value) return value.length is 0 else if angular.isObject(value) return false for key of value when value.hasOwnProperty(key) true restrict: 'A' require: '?ngModel' priority: 1 link: (scope, element, attr, ngModel) -> scope.disabledValuesHistory = if scope.disabledValuesHistory then scope.disabledValuesHistory else [] element = $ element # Use real JQuery if it wasn't loaded before Angular. element.addClass('localytics-chosen') # Take a hash of options from the chosen directive options = scope.$eval(attr.chosen) or {} # Options defined as attributes take precedence angular.forEach attr, (value, key) -> if key in CHOSEN_OPTION_WHITELIST # Observe attributes # Update the value in options. Set the default texts again. Update message. attr.$observe key, (value) -> options[snakeCase(key)] = if String(element.attr(attr.$attr[key])).slice(0, 2) is '{{' then value else scope.$eval(value) updateMessage(); startLoading = -> element.addClass('loading').attr('disabled', true).trigger('chosen:updated') stopLoading = -> element.removeClass('loading') if angular.isDefined attr.disabled element.attr 'disabled', attr.disabled else element.attr 'disabled', false element.trigger('chosen:updated') chosen = null empty = false initOrUpdate = -> if chosen element.trigger('chosen:updated') else $timeout -> chosen = element.chosen(options).data('chosen') return if angular.isObject(chosen) defaultText = chosen.default_text # Use Chosen's placeholder or no results found text depending on whether there are options available updateMessage = -> if empty element.attr('data-placeholder', chosen.results_none_found).attr('disabled', true) else element.removeAttr('data-placeholder') element.trigger('chosen:updated') # Watch the underlying ngModel for updates and trigger an update when they occur. if ngModel origRender = ngModel.$render ngModel.$render = -> origRender() initOrUpdate() element.on 'chosen:hiding_dropdown', -> scope.$apply -> ngModel.$setTouched() # This is basically taken from angular ngOptions source. ngModel watches reference, not value, # so when values are added or removed from array ngModels, $render won't be fired. if attr.multiple viewWatch = -> ngModel.$viewValue scope.$watch viewWatch, ngModel.$render, true # If we're not using ngModel (and therefore also not using ngOptions, which requires ngModel), # just initialize chosen immediately since there's no need to wait for ngOptions to render first else initOrUpdate() # Watch the disabled attribute (could be set by ngDisabled) attr.$observe 'disabled', -> element.trigger('chosen:updated') # Watch the collection in ngOptions and update chosen when it changes. This works with promises! # ngOptions doesn't do anything unless there is an ngModel, so neither do we. if attr.ngOptions and ngModel match = attr.ngOptions.match(NG_OPTIONS_REGEXP) valuesExpr = match[7] scope.$watchCollection valuesExpr, (newVal, oldVal) -> # Defer execution until DOM is loaded timer = $timeout(-> if angular.isUndefined(newVal) startLoading() else empty = isEmpty(newVal) stopLoading() updateMessage() ) scope.$on '$destroy', (event) -> $timeout.cancel timer if timer? ]

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