| /** |
| * @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 { ElementRef, AfterViewInit, DoCheck, OnDestroy, NgZone } from '@angular/core'; |
| import { Platform } from '@angular/cdk/platform'; |
| /** Directive to automatically resize a textarea to fit its content. */ |
| export declare class CdkTextareaAutosize implements AfterViewInit, DoCheck, OnDestroy { |
| private _elementRef; |
| private _platform; |
| private _ngZone; |
| /** Keep track of the previous textarea value to avoid resizing when the value hasn't changed. */ |
| private _previousValue?; |
| private _initialHeight; |
| private readonly _destroyed; |
| private _minRows; |
| private _maxRows; |
| private _enabled; |
| /** |
| * Value of minRows as of last resize. If the minRows has decreased, the |
| * height of the textarea needs to be recomputed to reflect the new minimum. The maxHeight |
| * does not have the same problem because it does not affect the textarea's scrollHeight. |
| */ |
| private _previousMinRows; |
| private _textareaElement; |
| /** Minimum amount of rows in the textarea. */ |
| minRows: number; |
| /** Maximum amount of rows in the textarea. */ |
| maxRows: number; |
| /** Whether autosizing is enabled or not */ |
| enabled: boolean; |
| /** Cached height of a textarea with a single row. */ |
| private _cachedLineHeight; |
| constructor(_elementRef: ElementRef<HTMLElement>, _platform: Platform, _ngZone: NgZone); |
| /** Sets the minimum height of the textarea as determined by minRows. */ |
| _setMinHeight(): void; |
| /** Sets the maximum height of the textarea as determined by maxRows. */ |
| _setMaxHeight(): void; |
| ngAfterViewInit(): void; |
| ngOnDestroy(): void; |
| /** |
| * Cache the height of a single-row textarea if it has not already been cached. |
| * |
| * We need to know how large a single "row" of a textarea is in order to apply minRows and |
| * maxRows. For the initial version, we will assume that the height of a single line in the |
| * textarea does not ever change. |
| */ |
| private _cacheTextareaLineHeight; |
| ngDoCheck(): void; |
| /** |
| * Resize the textarea to fit its content. |
| * @param force Whether to force a height recalculation. By default the height will be |
| * recalculated only if the value changed since the last call. |
| */ |
| resizeToFitContent(force?: boolean): void; |
| /** |
| * Resets the textarea to it's original size |
| */ |
| reset(): void; |
| _noopInputHandler(): void; |
| /** |
| * Scrolls a textarea to the caret position. On Firefox resizing the textarea will |
| * prevent it from scrolling to the caret position. We need to re-set the selection |
| * in order for it to scroll to the proper position. |
| */ |
| private _scrollToCaretPosition; |
| } |