@angular/forms
Version:
Angular - directives and services for creating forms
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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 { composeAsyncValidators, composeValidators } from '../validators';
/**
* @description
* Base class for control directives.
*
* This class is only used internally in the `ReactiveFormsModule` and the `FormsModule`.
*
* @publicApi
*/
export class AbstractControlDirective {
constructor() {
/**
* Set of synchronous validators as they were provided while calling `setValidators` function.
* @internal
*/
this._rawValidators = [];
/**
* Set of asynchronous validators as they were provided while calling `setAsyncValidators`
* function.
* @internal
*/
this._rawAsyncValidators = [];
/*
* The set of callbacks to be invoked when directive instance is being destroyed.
*/
this._onDestroyCallbacks = [];
}
/**
* @description
* Reports the value of the control if it is present, otherwise null.
*/
get value() {
return this.control ? this.control.value : null;
}
/**
* @description
* Reports whether the control is valid. A control is considered valid if no
* validation errors exist with the current value.
* If the control is not present, null is returned.
*/
get valid() {
return this.control ? this.control.valid : null;
}
/**
* @description
* Reports whether the control is invalid, meaning that an error exists in the input value.
* If the control is not present, null is returned.
*/
get invalid() {
return this.control ? this.control.invalid : null;
}
/**
* @description
* Reports whether a control is pending, meaning that async validation is occurring and
* errors are not yet available for the input value. If the control is not present, null is
* returned.
*/
get pending() {
return this.control ? this.control.pending : null;
}
/**
* @description
* Reports whether the control is disabled, meaning that the control is disabled
* in the UI and is exempt from validation checks and excluded from aggregate
* values of ancestor controls. If the control is not present, null is returned.
*/
get disabled() {
return this.control ? this.control.disabled : null;
}
/**
* @description
* Reports whether the control is enabled, meaning that the control is included in ancestor
* calculations of validity or value. If the control is not present, null is returned.
*/
get enabled() {
return this.control ? this.control.enabled : null;
}
/**
* @description
* Reports the control's validation errors. If the control is not present, null is returned.
*/
get errors() {
return this.control ? this.control.errors : null;
}
/**
* @description
* Reports whether the control is pristine, meaning that the user has not yet changed
* the value in the UI. If the control is not present, null is returned.
*/
get pristine() {
return this.control ? this.control.pristine : null;
}
/**
* @description
* Reports whether the control is dirty, meaning that the user has changed
* the value in the UI. If the control is not present, null is returned.
*/
get dirty() {
return this.control ? this.control.dirty : null;
}
/**
* @description
* Reports whether the control is touched, meaning that the user has triggered
* a `blur` event on it. If the control is not present, null is returned.
*/
get touched() {
return this.control ? this.control.touched : null;
}
/**
* @description
* Reports the validation status of the control. Possible values include:
* 'VALID', 'INVALID', 'DISABLED', and 'PENDING'.
* If the control is not present, null is returned.
*/
get status() {
return this.control ? this.control.status : null;
}
/**
* @description
* Reports whether the control is untouched, meaning that the user has not yet triggered
* a `blur` event on it. If the control is not present, null is returned.
*/
get untouched() {
return this.control ? this.control.untouched : null;
}
/**
* @description
* Returns a multicasting observable that emits a validation status whenever it is
* calculated for the control. If the control is not present, null is returned.
*/
get statusChanges() {
return this.control ? this.control.statusChanges : null;
}
/**
* @description
* Returns a multicasting observable of value changes for the control that emits every time the
* value of the control changes in the UI or programmatically.
* If the control is not present, null is returned.
*/
get valueChanges() {
return this.control ? this.control.valueChanges : null;
}
/**
* @description
* Returns an array that represents the path from the top-level form to this control.
* Each index is the string name of the control on that level.
*/
get path() {
return null;
}
/**
* Sets synchronous validators for this directive.
* @internal
*/
_setValidators(validators) {
this._rawValidators = validators || [];
this._composedValidatorFn = composeValidators(this._rawValidators);
}
/**
* Sets asynchronous validators for this directive.
* @internal
*/
_setAsyncValidators(validators) {
this._rawAsyncValidators = validators || [];
this._composedAsyncValidatorFn = composeAsyncValidators(this._rawAsyncValidators);
}
/**
* @description
* Synchronous validator function composed of all the synchronous validators registered with this
* directive.
*/
get validator() {
return this._composedValidatorFn || null;
}
/**
* @description
* Asynchronous validator function composed of all the asynchronous validators registered with
* this directive.
*/
get asyncValidator() {
return this._composedAsyncValidatorFn || null;
}
/**
* Internal function to register callbacks that should be invoked
* when directive instance is being destroyed.
* @internal
*/
_registerOnDestroy(fn) {
this._onDestroyCallbacks.push(fn);
}
/**
* Internal function to invoke all registered "on destroy" callbacks.
* Note: calling this function also clears the list of callbacks.
* @internal
*/
_invokeOnDestroyCallbacks() {
this._onDestroyCallbacks.forEach(fn => fn());
this._onDestroyCallbacks = [];
}
/**
* @description
* Resets the control with the provided value if the control is present.
*/
reset(value = undefined) {
if (this.control)
this.control.reset(value);
}
/**
* @description
* Reports whether the control with the given path has the error specified.
*
* @param errorCode The code of the error to check
* @param path A list of control names that designates how to move from the current control
* to the control that should be queried for errors.
*
* @usageNotes
* For example, for the following `FormGroup`:
*
* ```
* form = new FormGroup({
* address: new FormGroup({ street: new FormControl() })
* });
* ```
*
* The path to the 'street' control from the root form would be 'address' -> 'street'.
*
* It can be provided to this method in one of two formats:
*
* 1. An array of string control names, e.g. `['address', 'street']`
* 1. A period-delimited list of control names in one string, e.g. `'address.street'`
*
* If no path is given, this method checks for the error on the current control.
*
* @returns whether the given error is present in the control at the given path.
*
* If the control is not present, false is returned.
*/
hasError(errorCode, path) {
return this.control ? this.control.hasError(errorCode, path) : false;
}
/**
* @description
* Reports error data for the control with the given path.
*
* @param errorCode The code of the error to check
* @param path A list of control names that designates how to move from the current control
* to the control that should be queried for errors.
*
* @usageNotes
* For example, for the following `FormGroup`:
*
* ```
* form = new FormGroup({
* address: new FormGroup({ street: new FormControl() })
* });
* ```
*
* The path to the 'street' control from the root form would be 'address' -> 'street'.
*
* It can be provided to this method in one of two formats:
*
* 1. An array of string control names, e.g. `['address', 'street']`
* 1. A period-delimited list of control names in one string, e.g. `'address.street'`
*
* @returns error data for that particular error. If the control or error is not present,
* null is returned.
*/
getError(errorCode, path) {
return this.control ? this.control.getError(errorCode, path) : null;
}
}
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Most properties fall through to that instance.\n   */\n  abstract get control(): AbstractControl|null;\n\n  /**\n   * @description\n   * Reports the value of the control if it is present, otherwise null.\n   */\n  get value(): any {\n    return this.control ? this.control.value : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is valid. A control is considered valid if no\n   * validation errors exist with the current value.\n   * If the control is not present, null is returned.\n   */\n  get valid(): boolean|null {\n    return this.control ? this.control.valid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is invalid, meaning that an error exists in the input value.\n   * If the control is not present, null is returned.\n   */\n  get invalid(): boolean|null {\n    return this.control ? this.control.invalid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether a control is pending, meaning that async validation is occurring and\n   * errors are not yet available for the input value. If the control is not present, null is\n   * returned.\n   */\n  get pending(): boolean|null {\n    return this.control ? this.control.pending : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is disabled, meaning that the control is disabled\n   * in the UI and is exempt from validation checks and excluded from aggregate\n   * values of ancestor controls. If the control is not present, null is returned.\n   */\n  get disabled(): boolean|null {\n    return this.control ? this.control.disabled : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is enabled, meaning that the control is included in ancestor\n   * calculations of validity or value. If the control is not present, null is returned.\n   */\n  get enabled(): boolean|null {\n    return this.control ? this.control.enabled : null;\n  }\n\n  /**\n   * @description\n   * Reports the control's validation errors. If the control is not present, null is returned.\n   */\n  get errors(): ValidationErrors|null {\n    return this.control ? this.control.errors : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is pristine, meaning that the user has not yet changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get pristine(): boolean|null {\n    return this.control ? this.control.pristine : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is dirty, meaning that the user has changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get dirty(): boolean|null {\n    return this.control ? this.control.dirty : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is touched, meaning that the user has triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get touched(): boolean|null {\n    return this.control ? this.control.touched : null;\n  }\n\n  /**\n   * @description\n   * Reports the validation status of the control. Possible values include:\n   * 'VALID', 'INVALID', 'DISABLED', and 'PENDING'.\n   * If the control is not present, null is returned.\n   */\n  get status(): string|null {\n    return this.control ? this.control.status : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is untouched, meaning that the user has not yet triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get untouched(): boolean|null {\n    return this.control ? this.control.untouched : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable that emits a validation status whenever it is\n   * calculated for the control. If the control is not present, null is returned.\n   */\n  get statusChanges(): Observable<any>|null {\n    return this.control ? this.control.statusChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable of value changes for the control that emits every time the\n   * value of the control changes in the UI or programmatically.\n   * If the control is not present, null is returned.\n   */\n  get valueChanges(): Observable<any>|null {\n    return this.control ? this.control.valueChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[]|null {\n    return null;\n  }\n\n  /**\n   * Contains the result of merging synchronous validators into a single validator function\n   * (combined using `Validators.compose`).\n   */\n  private _composedValidatorFn: ValidatorFn|null|undefined;\n\n  /**\n   * Contains the result of merging asynchronous validators into a single validator function\n   * (combined using `Validators.composeAsync`).\n   */\n  private _composedAsyncValidatorFn: AsyncValidatorFn|null|undefined;\n\n  /**\n   * Set of synchronous validators as they were provided while calling `setValidators` function.\n   * @internal\n   */\n  _rawValidators: Array<Validator|ValidatorFn> = [];\n\n  /**\n   * Set of asynchronous validators as they were provided while calling `setAsyncValidators`\n   * function.\n   * @internal\n   */\n  _rawAsyncValidators: Array<AsyncValidator|AsyncValidatorFn> = [];\n\n  /**\n   * Sets synchronous validators for this directive.\n   * @internal\n   */\n  _setValidators(validators: Array<Validator|ValidatorFn>|undefined): void {\n    this._rawValidators = validators || [];\n    this._composedValidatorFn = composeValidators(this._rawValidators);\n  }\n\n  /**\n   * Sets asynchronous validators for this directive.\n   * @internal\n   */\n  _setAsyncValidators(validators: Array<AsyncValidator|AsyncValidatorFn>|undefined): void {\n    this._rawAsyncValidators = validators || [];\n    this._composedAsyncValidatorFn = composeAsyncValidators(this._rawAsyncValidators);\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators registered with this\n   * directive.\n   */\n  get validator(): ValidatorFn|null {\n    return this._composedValidatorFn || null;\n  }\n\n  /**\n   * @description\n   * Asynchronous validator function composed of all the asynchronous validators registered with\n   * this directive.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return this._composedAsyncValidatorFn || null;\n  }\n\n  /*\n   * The set of callbacks to be invoked when directive instance is being destroyed.\n   */\n  private _onDestroyCallbacks: (() => void)[] = [];\n\n  /**\n   * Internal function to register callbacks that should be invoked\n   * when directive instance is being destroyed.\n   * @internal\n   */\n  _registerOnDestroy(fn: () => void): void {\n    this._onDestroyCallbacks.push(fn);\n  }\n\n  /**\n   * Internal function to invoke all registered \"on destroy\" callbacks.\n   * Note: calling this function also clears the list of callbacks.\n   * @internal\n   */\n  _invokeOnDestroyCallbacks(): void {\n    this._onDestroyCallbacks.forEach(fn => fn());\n    this._onDestroyCallbacks = [];\n  }\n\n  /**\n   * @description\n   * Resets the control with the provided value if the control is present.\n   */\n  reset(value: any = undefined): void {\n    if (this.control) this.control.reset(value);\n  }\n\n  /**\n   * @description\n   * Reports whether the control with the given path has the error specified.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * If no path is given, this method checks for the error on the current control.\n   *\n   * @returns whether the given error is present in the control at the given path.\n   *\n   * If the control is not present, false is returned.\n   */\n  hasError(errorCode: string, path?: Array<string|number>|string): boolean {\n    return this.control ? this.control.hasError(errorCode, path) : false;\n  }\n\n  /**\n   * @description\n   * Reports error data for the control with the given path.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * @returns error data for that particular error. If the control or error is not present,\n   * null is returned.\n   */\n  getError(errorCode: string, path?: Array<string|number>|string): any {\n    return this.control ? this.control.getError(errorCode, path) : null;\n  }\n}\n"]}