@angular/forms
Version:
Angular - directives and services for creating forms
92 lines • 13.9 kB
JavaScript
/**
* @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, InjectionToken, Renderer2 } from '@angular/core';
import * as i0 from "@angular/core";
/**
* Base class for all ControlValueAccessor classes defined in Forms package.
* Contains common logic and utility functions.
*
* Note: this is an *internal-only* class and should not be extended or used directly in
* applications code.
*/
export class BaseControlValueAccessor {
constructor(_renderer, _elementRef) {
this._renderer = _renderer;
this._elementRef = _elementRef;
/**
* The registered callback function called when a change or input event occurs on the input
* element.
* @nodoc
*/
this.onChange = (_) => { };
/**
* The registered callback function called when a blur event occurs on the input element.
* @nodoc
*/
this.onTouched = () => { };
}
/**
* Helper method that sets a property on a target element using the current Renderer
* implementation.
* @nodoc
*/
setProperty(key, value) {
this._renderer.setProperty(this._elementRef.nativeElement, key, value);
}
/**
* Registers a function called when the control is touched.
* @nodoc
*/
registerOnTouched(fn) {
this.onTouched = fn;
}
/**
* Registers a function called when the control value changes.
* @nodoc
*/
registerOnChange(fn) {
this.onChange = fn;
}
/**
* Sets the "disabled" property on the range input element.
* @nodoc
*/
setDisabledState(isDisabled) {
this.setProperty('disabled', isDisabled);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.5", ngImport: i0, type: BaseControlValueAccessor, deps: [{ token: i0.Renderer2 }, { token: i0.ElementRef }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.3.5", type: BaseControlValueAccessor, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.5", ngImport: i0, type: BaseControlValueAccessor, decorators: [{
type: Directive
}], ctorParameters: () => [{ type: i0.Renderer2 }, { type: i0.ElementRef }] });
/**
* Base class for all built-in ControlValueAccessor classes (except DefaultValueAccessor, which is
* used in case no other CVAs can be found). We use this class to distinguish between default CVA,
* built-in CVAs and custom CVAs, so that Forms logic can recognize built-in CVAs and treat custom
* ones with higher priority (when both built-in and custom CVAs are present).
*
* Note: this is an *internal-only* class and should not be extended or used directly in
* applications code.
*/
export class BuiltInControlValueAccessor extends BaseControlValueAccessor {
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.3.5", ngImport: i0, type: BuiltInControlValueAccessor, deps: null, target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "17.3.5", type: BuiltInControlValueAccessor, usesInheritance: true, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.3.5", ngImport: i0, type: BuiltInControlValueAccessor, decorators: [{
type: Directive
}] });
/**
* Used to provide a `ControlValueAccessor` for form controls.
*
* See `DefaultValueAccessor` for how to implement one.
*
* @publicApi
*/
export const NG_VALUE_ACCESSOR = new InjectionToken(ngDevMode ? 'NgValueAccessor' : '');
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Depending on the status, it enables or disables the\n   * appropriate DOM element.\n   *\n   * @usageNotes\n   * The following is an example of writing the disabled property to a native DOM element:\n   *\n   * ```ts\n   * setDisabledState(isDisabled: boolean): void {\n   *   this._renderer.setProperty(this._elementRef.nativeElement, 'disabled', isDisabled);\n   * }\n   * ```\n   *\n   * @param isDisabled The disabled status to set on the element\n   */\n  setDisabledState?(isDisabled: boolean): void;\n}\n\n/**\n * Base class for all ControlValueAccessor classes defined in Forms package.\n * Contains common logic and utility functions.\n *\n * Note: this is an *internal-only* class and should not be extended or used directly in\n * applications code.\n */\n@Directive()\nexport class BaseControlValueAccessor {\n  /**\n   * The registered callback function called when a change or input event occurs on the input\n   * element.\n   * @nodoc\n   */\n  onChange = (_: any) => {};\n\n  /**\n   * The registered callback function called when a blur event occurs on the input element.\n   * @nodoc\n   */\n  onTouched = () => {};\n\n  constructor(private _renderer: Renderer2, private _elementRef: ElementRef) {}\n\n  /**\n   * Helper method that sets a property on a target element using the current Renderer\n   * implementation.\n   * @nodoc\n   */\n  protected setProperty(key: string, value: any): void {\n    this._renderer.setProperty(this._elementRef.nativeElement, key, value);\n  }\n\n  /**\n   * Registers a function called when the control is touched.\n   * @nodoc\n   */\n  registerOnTouched(fn: () => void): void {\n    this.onTouched = fn;\n  }\n\n  /**\n   * Registers a function called when the control value changes.\n   * @nodoc\n   */\n  registerOnChange(fn: (_: any) => {}): void {\n    this.onChange = fn;\n  }\n\n  /**\n   * Sets the \"disabled\" property on the range input element.\n   * @nodoc\n   */\n  setDisabledState(isDisabled: boolean): void {\n    this.setProperty('disabled', isDisabled);\n  }\n}\n\n/**\n * Base class for all built-in ControlValueAccessor classes (except DefaultValueAccessor, which is\n * used in case no other CVAs can be found). We use this class to distinguish between default CVA,\n * built-in CVAs and custom CVAs, so that Forms logic can recognize built-in CVAs and treat custom\n * ones with higher priority (when both built-in and custom CVAs are present).\n *\n * Note: this is an *internal-only* class and should not be extended or used directly in\n * applications code.\n */\n@Directive()\nexport class BuiltInControlValueAccessor extends BaseControlValueAccessor {\n}\n\n/**\n * Used to provide a `ControlValueAccessor` for form controls.\n *\n * See `DefaultValueAccessor` for how to implement one.\n *\n * @publicApi\n */\nexport const NG_VALUE_ACCESSOR =\n    new InjectionToken<ReadonlyArray<ControlValueAccessor>>(ngDevMode ? 'NgValueAccessor' : '');\n"]}