source: trip-planner-front/node_modules/@angular/common/esm2015/src/directives/ng_plural.js

/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { Attribute, Directive, Host, Input, TemplateRef, ViewContainerRef } from '@angular/core';
import { getPluralCategory, NgLocalization } from '../i18n/localization';
import { SwitchView } from './ng_switch';
/**
 * @ngModule CommonModule
 *
 * @usageNotes
 * ```
 * <some-element [ngPlural]="value">
 *   <ng-template ngPluralCase="=0">there is nothing</ng-template>
 *   <ng-template ngPluralCase="=1">there is one</ng-template>
 *   <ng-template ngPluralCase="few">there are a few</ng-template>
 * </some-element>
 * ```
 *
 * @description
 *
 * Adds / removes DOM sub-trees based on a numeric value. Tailored for pluralization.
 *
 * Displays DOM sub-trees that match the switch expression value, or failing that, DOM sub-trees
 * that match the switch expression's pluralization category.
 *
 * To use this directive you must provide a container element that sets the `[ngPlural]` attribute
 * to a switch expression. Inner elements with a `[ngPluralCase]` will display based on their
 * expression:
 * - if `[ngPluralCase]` is set to a value starting with `=`, it will only display if the value
 *   matches the switch expression exactly,
 * - otherwise, the view will be treated as a "category match", and will only display if exact
 *   value matches aren't found and the value maps to its category for the defined locale.
 *
 * See http://cldr.unicode.org/index/cldr-spec/plural-rules
 *
 * @publicApi
 */
export class NgPlural {
    constructor(_localization) {
        this._localization = _localization;
        this._caseViews = {};
    }
    set ngPlural(value) {
        this._switchValue = value;
        this._updateView();
    }
    addCase(value, switchView) {
        this._caseViews[value] = switchView;
    }
    _updateView() {
        this._clearViews();
        const cases = Object.keys(this._caseViews);
        const key = getPluralCategory(this._switchValue, cases, this._localization);
        this._activateView(this._caseViews[key]);
    }
    _clearViews() {
        if (this._activeView)
            this._activeView.destroy();
    }
    _activateView(view) {
        if (view) {
            this._activeView = view;
            this._activeView.create();
        }
    }
}
NgPlural.decorators = [
    { type: Directive, args: [{ selector: '[ngPlural]' },] }
];
NgPlural.ctorParameters = () => [
    { type: NgLocalization }
];
NgPlural.propDecorators = {
    ngPlural: [{ type: Input }]
};
/**
 * @ngModule CommonModule
 *
 * @description
 *
 * Creates a view that will be added/removed from the parent {@link NgPlural} when the
 * given expression matches the plural expression according to CLDR rules.
 *
 * @usageNotes
 * ```
 * <some-element [ngPlural]="value">
 *   <ng-template ngPluralCase="=0">...</ng-template>
 *   <ng-template ngPluralCase="other">...</ng-template>
 * </some-element>
 *```
 *
 * See {@link NgPlural} for more details and example.
 *
 * @publicApi
 */
export class NgPluralCase {
    constructor(value, template, viewContainer, ngPlural) {
        this.value = value;
        const isANumber = !isNaN(Number(value));
        ngPlural.addCase(isANumber ? `=${value}` : value, new SwitchView(viewContainer, template));
    }
}
NgPluralCase.decorators = [
    { type: Directive, args: [{ selector: '[ngPluralCase]' },] }
];
NgPluralCase.ctorParameters = () => [
    { type: String, decorators: [{ type: Attribute, args: ['ngPluralCase',] }] },
    { type: TemplateRef },
    { type: ViewContainerRef },
    { type: NgPlural, decorators: [{ type: Host }] }
];
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