/**
 * @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 { Directive, ElementRef, Input, KeyValueDiffers, Renderer2, RendererStyleFlags2 } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * @ngModule CommonModule
 *
 * @usageNotes
 *
 * Set the font of the containing element to the result of an expression.
 *
 * ```
 * <some-element [ngStyle]="{'font-style': styleExp}">...</some-element>
 * ```
 *
 * Set the width of the containing element to a pixel value returned by an expression.
 *
 * ```
 * <some-element [ngStyle]="{'max-width.px': widthExp}">...</some-element>
 * ```
 *
 * Set a collection of style values using an expression that returns key-value pairs.
 *
 * ```
 * <some-element [ngStyle]="objExp">...</some-element>
 * ```
 *
 * @description
 *
 * An attribute directive that updates styles for the containing HTML element.
 * Sets one or more style properties, specified as colon-separated key-value pairs.
 * The key is a style name, with an optional `.<unit>` suffix
 * (such as 'top.px', 'font-style.em').
 * The value is an expression to be evaluated.
 * The resulting non-null value, expressed in the given unit,
 * is assigned to the given style property.
 * If the result of evaluation is null, the corresponding style is removed.
 *
 * @publicApi
 */
export class NgStyle {
    constructor(_ngEl, _differs, _renderer) {
        this._ngEl = _ngEl;
        this._differs = _differs;
        this._renderer = _renderer;
        this._ngStyle = null;
        this._differ = null;
    }
    set ngStyle(values) {
        this._ngStyle = values;
        if (!this._differ && values) {
            this._differ = this._differs.find(values).create();
        }
    }
    ngDoCheck() {
        if (this._differ) {
            const changes = this._differ.diff(this._ngStyle);
            if (changes) {
                this._applyChanges(changes);
            }
        }
    }
    _setStyle(nameAndUnit, value) {
        const [name, unit] = nameAndUnit.split('.');
        const flags = name.indexOf('-') === -1 ? undefined : RendererStyleFlags2.DashCase;
        if (value != null) {
            this._renderer.setStyle(this._ngEl.nativeElement, name, unit ? `${value}${unit}` : value, flags);
        }
        else {
            this._renderer.removeStyle(this._ngEl.nativeElement, name, flags);
        }
    }
    _applyChanges(changes) {
        changes.forEachRemovedItem((record) => this._setStyle(record.key, null));
        changes.forEachAddedItem((record) => this._setStyle(record.key, record.currentValue));
        changes.forEachChangedItem((record) => this._setStyle(record.key, record.currentValue));
    }
}
NgStyle.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: NgStyle, deps: [{ token: i0.ElementRef }, { token: i0.KeyValueDiffers }, { token: i0.Renderer2 }], target: i0.ɵɵFactoryTarget.Directive });
NgStyle.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "14.3.0", type: NgStyle, isStandalone: true, selector: "[ngStyle]", inputs: { ngStyle: "ngStyle" }, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.3.0", ngImport: i0, type: NgStyle, decorators: [{
            type: Directive,
            args: [{
                    selector: '[ngStyle]',
                    standalone: true,
                }]
        }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i0.KeyValueDiffers }, { type: i0.Renderer2 }]; }, propDecorators: { ngStyle: [{
                type: Input,
                args: ['ngStyle']
            }] } });
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