docs(forms): add api docs for AbstractControlDirective

packages/forms/src/directives/abstract_control_directive.ts

@@ -18,50 +18,147 @@ import {ValidationErrors} from './validators';
  * @stable
  */
 export abstract class AbstractControlDirective {
+  /**
+   * The {@link FormControl}, {@link FormGroup}, or {@link FormArray}
+   * that backs this directive. Most properties fall through to that
+   * instance.
+   */
   abstract get control(): AbstractControl|null;
 
+  /** The value of the control. */
   get value(): any { return this.control ? this.control.value : null; }
 
+  /**
+   * A control is `valid` when its `status === VALID`.
+   *
+   * In order to have this status, the control must have passed all its
+   * validation checks.
+   */
   get valid(): boolean|null { return this.control ? this.control.valid : null; }
 
+  /**
+   * A control is `invalid` when its `status === INVALID`.
+   *
+   * In order to have this status, the control must have failed
+   * at least one of its validation checks.
+   */
   get invalid(): boolean|null { return this.control ? this.control.invalid : null; }
 
+  /**
+   * A control is `pending` when its `status === PENDING`.
+   *
+   * In order to have this status, the control must be in the
+   * middle of conducting a validation check.
+   */
   get pending(): boolean|null { return this.control ? this.control.pending : null; }
 
+  /**
+   * A control is `disabled` when its `status === DISABLED`.
+   *
+   * Disabled controls are exempt from validation checks and
+   * are not included in the aggregate value of their ancestor
+   * controls.
+   */
+  get disabled(): boolean|null { return this.control ? this.control.disabled : null; }
+
+  /**
+   * A control is `enabled` as long as its `status !== DISABLED`.
+   *
+   * In other words, it has a status of `VALID`, `INVALID`, or
+   * `PENDING`.
+   */
+  get enabled(): boolean|null { return this.control ? this.control.enabled : null; }
+
+  /**
+   * Returns any errors generated by failing validation. If there
+   * are no errors, it will return null.
+   */
   get errors(): ValidationErrors|null { return this.control ? this.control.errors : null; }
 
+  /**
+   * A control is `pristine` if the user has not yet changed
+   * the value in the UI.
+   *
+   * Note that programmatic changes to a control's value will
+   * *not* mark it dirty.
+   */
   get pristine(): boolean|null { return this.control ? this.control.pristine : null; }
 
+  /**
+   * A control is `dirty` if the user has changed the value
+   * in the UI.
+   *
+   * Note that programmatic changes to a control's value will
+   * *not* mark it dirty.
+   */
   get dirty(): boolean|null { return this.control ? this.control.dirty : null; }
 
+  /**
+   * A control is marked `touched` once the user has triggered
+   * a `blur` event on it.
+   */
   get touched(): boolean|null { return this.control ? this.control.touched : null; }
 
   get status(): string|null { return this.control ? this.control.status : null; }
 
+  /**
+   * A control is `untouched` if the user has not yet triggered
+   * a `blur` event on it.
+   */
   get untouched(): boolean|null { return this.control ? this.control.untouched : null; }
 
-  get disabled(): boolean|null { return this.control ? this.control.disabled : null; }
-
-  get enabled(): boolean|null { return this.control ? this.control.enabled : null; }
-
+  /**
+   * Emits an event every time the validation status of the control
+   * is re-calculated.
+   */
   get statusChanges(): Observable<any>|null {
     return this.control ? this.control.statusChanges : null;
   }
 
+  /**
+   * Emits an event every time the value of the control changes, in
+   * the UI or programmatically.
+   */
   get valueChanges(): Observable<any>|null {
     return this.control ? this.control.valueChanges : null;
   }
 
+  /**
+   * 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(): string[]|null { return null; }
 
+  /**
+   * Resets the form control. This means by default:
+   *
+   * * it is marked as `pristine`
+   * * it is marked as `untouched`
+   * * value is set to null
+   *
+   * For more information, see {@link AbstractControl}.
+   */
   reset(value: any = undefined): void {
     if (this.control) this.control.reset(value);
   }
 
+  /**
+   * Returns true if the control with the given path has the error specified. Otherwise
+   * returns false.
+   *
+   * If no path is given, it checks for the error on the present control.
+   */
   hasError(errorCode: string, path?: string[]): boolean {
     return this.control ? this.control.hasError(errorCode, path) : false;
   }
 
+  /**
+   * Returns error data if the control with the given path has the error specified. Otherwise
+   * returns null or undefined.
+   *
+   * If no path is given, it checks for the error on the present control.
+   */
   getError(errorCode: string, path?: string[]): any {
     return this.control ? this.control.getError(errorCode, path) : null;
   }

packages/forms/src/model.ts

@@ -518,7 +518,7 @@ export abstract class AbstractControl {
   get(path: Array<string|number>|string): AbstractControl|null { return _find(this, path, '.'); }
 
   /**
-   * Returns true if the control with the given path has the error specified. Otherwise
+   * Returns error data if the control with the given path has the error specified. Otherwise
    * returns null or undefined.
    *
    * If no path is given, it checks for the error on the present control.