| import { normalizePassiveListenerOptions, Platform, PlatformModule } from '@angular/cdk/platform'; |
| import { ɵɵdefineInjectable, ɵɵinject, NgZone, Injectable, EventEmitter, Directive, ElementRef, Output, Optional, Inject, Input, HostListener, NgModule } from '@angular/core'; |
| import { coerceElement, coerceNumberProperty, coerceBooleanProperty } from '@angular/cdk/coercion'; |
| import { EMPTY, Subject, fromEvent } from 'rxjs'; |
| import { auditTime, takeUntil } from 'rxjs/operators'; |
| import { DOCUMENT } from '@angular/common'; |
| |
| /** |
| * @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 |
| */ |
| /** Options to pass to the animationstart listener. */ |
| const listenerOptions = normalizePassiveListenerOptions({ passive: true }); |
| /** |
| * An injectable service that can be used to monitor the autofill state of an input. |
| * Based on the following blog post: |
| * https://medium.com/@brunn/detecting-autofilled-fields-in-javascript-aed598d25da7 |
| */ |
| class AutofillMonitor { |
| constructor(_platform, _ngZone) { |
| this._platform = _platform; |
| this._ngZone = _ngZone; |
| this._monitoredElements = new Map(); |
| } |
| monitor(elementOrRef) { |
| if (!this._platform.isBrowser) { |
| return EMPTY; |
| } |
| const element = coerceElement(elementOrRef); |
| const info = this._monitoredElements.get(element); |
| if (info) { |
| return info.subject; |
| } |
| const result = new Subject(); |
| const cssClass = 'cdk-text-field-autofilled'; |
| const listener = ((event) => { |
| // Animation events fire on initial element render, we check for the presence of the autofill |
| // CSS class to make sure this is a real change in state, not just the initial render before |
| // we fire off events. |
| if (event.animationName === 'cdk-text-field-autofill-start' && |
| !element.classList.contains(cssClass)) { |
| element.classList.add(cssClass); |
| this._ngZone.run(() => result.next({ target: event.target, isAutofilled: true })); |
| } |
| else if (event.animationName === 'cdk-text-field-autofill-end' && |
| element.classList.contains(cssClass)) { |
| element.classList.remove(cssClass); |
| this._ngZone.run(() => result.next({ target: event.target, isAutofilled: false })); |
| } |
| }); |
| this._ngZone.runOutsideAngular(() => { |
| element.addEventListener('animationstart', listener, listenerOptions); |
| element.classList.add('cdk-text-field-autofill-monitored'); |
| }); |
| this._monitoredElements.set(element, { |
| subject: result, |
| unlisten: () => { |
| element.removeEventListener('animationstart', listener, listenerOptions); |
| } |
| }); |
| return result; |
| } |
| stopMonitoring(elementOrRef) { |
| const element = coerceElement(elementOrRef); |
| const info = this._monitoredElements.get(element); |
| if (info) { |
| info.unlisten(); |
| info.subject.complete(); |
| element.classList.remove('cdk-text-field-autofill-monitored'); |
| element.classList.remove('cdk-text-field-autofilled'); |
| this._monitoredElements.delete(element); |
| } |
| } |
| ngOnDestroy() { |
| this._monitoredElements.forEach((_info, element) => this.stopMonitoring(element)); |
| } |
| } |
| AutofillMonitor.ɵprov = ɵɵdefineInjectable({ factory: function AutofillMonitor_Factory() { return new AutofillMonitor(ɵɵinject(Platform), ɵɵinject(NgZone)); }, token: AutofillMonitor, providedIn: "root" }); |
| AutofillMonitor.decorators = [ |
| { type: Injectable, args: [{ providedIn: 'root' },] } |
| ]; |
| AutofillMonitor.ctorParameters = () => [ |
| { type: Platform }, |
| { type: NgZone } |
| ]; |
| /** A directive that can be used to monitor the autofill state of an input. */ |
| class CdkAutofill { |
| constructor(_elementRef, _autofillMonitor) { |
| this._elementRef = _elementRef; |
| this._autofillMonitor = _autofillMonitor; |
| /** Emits when the autofill state of the element changes. */ |
| this.cdkAutofill = new EventEmitter(); |
| } |
| ngOnInit() { |
| this._autofillMonitor |
| .monitor(this._elementRef) |
| .subscribe(event => this.cdkAutofill.emit(event)); |
| } |
| ngOnDestroy() { |
| this._autofillMonitor.stopMonitoring(this._elementRef); |
| } |
| } |
| CdkAutofill.decorators = [ |
| { type: Directive, args: [{ |
| selector: '[cdkAutofill]', |
| },] } |
| ]; |
| CdkAutofill.ctorParameters = () => [ |
| { type: ElementRef }, |
| { type: AutofillMonitor } |
| ]; |
| CdkAutofill.propDecorators = { |
| cdkAutofill: [{ type: Output }] |
| }; |
| |
| /** |
| * @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 |
| */ |
| /** Directive to automatically resize a textarea to fit its content. */ |
| class CdkTextareaAutosize { |
| constructor(_elementRef, _platform, _ngZone, |
| /** @breaking-change 11.0.0 make document required */ |
| document) { |
| this._elementRef = _elementRef; |
| this._platform = _platform; |
| this._ngZone = _ngZone; |
| this._destroyed = new Subject(); |
| this._enabled = true; |
| /** |
| * 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. |
| */ |
| this._previousMinRows = -1; |
| this._document = document; |
| this._textareaElement = this._elementRef.nativeElement; |
| this._measuringClass = _platform.FIREFOX ? |
| 'cdk-textarea-autosize-measuring-firefox' : |
| 'cdk-textarea-autosize-measuring'; |
| } |
| /** Minimum amount of rows in the textarea. */ |
| get minRows() { return this._minRows; } |
| set minRows(value) { |
| this._minRows = coerceNumberProperty(value); |
| this._setMinHeight(); |
| } |
| /** Maximum amount of rows in the textarea. */ |
| get maxRows() { return this._maxRows; } |
| set maxRows(value) { |
| this._maxRows = coerceNumberProperty(value); |
| this._setMaxHeight(); |
| } |
| /** Whether autosizing is enabled or not */ |
| get enabled() { return this._enabled; } |
| set enabled(value) { |
| value = coerceBooleanProperty(value); |
| // Only act if the actual value changed. This specifically helps to not run |
| // resizeToFitContent too early (i.e. before ngAfterViewInit) |
| if (this._enabled !== value) { |
| (this._enabled = value) ? this.resizeToFitContent(true) : this.reset(); |
| } |
| } |
| /** Sets the minimum height of the textarea as determined by minRows. */ |
| _setMinHeight() { |
| const minHeight = this.minRows && this._cachedLineHeight ? |
| `${this.minRows * this._cachedLineHeight}px` : null; |
| if (minHeight) { |
| this._textareaElement.style.minHeight = minHeight; |
| } |
| } |
| /** Sets the maximum height of the textarea as determined by maxRows. */ |
| _setMaxHeight() { |
| const maxHeight = this.maxRows && this._cachedLineHeight ? |
| `${this.maxRows * this._cachedLineHeight}px` : null; |
| if (maxHeight) { |
| this._textareaElement.style.maxHeight = maxHeight; |
| } |
| } |
| ngAfterViewInit() { |
| if (this._platform.isBrowser) { |
| // Remember the height which we started with in case autosizing is disabled |
| this._initialHeight = this._textareaElement.style.height; |
| this.resizeToFitContent(); |
| this._ngZone.runOutsideAngular(() => { |
| const window = this._getWindow(); |
| fromEvent(window, 'resize') |
| .pipe(auditTime(16), takeUntil(this._destroyed)) |
| .subscribe(() => this.resizeToFitContent(true)); |
| }); |
| } |
| } |
| ngOnDestroy() { |
| this._destroyed.next(); |
| this._destroyed.complete(); |
| } |
| /** |
| * 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. |
| */ |
| _cacheTextareaLineHeight() { |
| if (this._cachedLineHeight) { |
| return; |
| } |
| // Use a clone element because we have to override some styles. |
| let textareaClone = this._textareaElement.cloneNode(false); |
| textareaClone.rows = 1; |
| // Use `position: absolute` so that this doesn't cause a browser layout and use |
| // `visibility: hidden` so that nothing is rendered. Clear any other styles that |
| // would affect the height. |
| textareaClone.style.position = 'absolute'; |
| textareaClone.style.visibility = 'hidden'; |
| textareaClone.style.border = 'none'; |
| textareaClone.style.padding = '0'; |
| textareaClone.style.height = ''; |
| textareaClone.style.minHeight = ''; |
| textareaClone.style.maxHeight = ''; |
| // In Firefox it happens that textarea elements are always bigger than the specified amount |
| // of rows. This is because Firefox tries to add extra space for the horizontal scrollbar. |
| // As a workaround that removes the extra space for the scrollbar, we can just set overflow |
| // to hidden. This ensures that there is no invalid calculation of the line height. |
| // See Firefox bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=33654 |
| textareaClone.style.overflow = 'hidden'; |
| this._textareaElement.parentNode.appendChild(textareaClone); |
| this._cachedLineHeight = textareaClone.clientHeight; |
| this._textareaElement.parentNode.removeChild(textareaClone); |
| // Min and max heights have to be re-calculated if the cached line height changes |
| this._setMinHeight(); |
| this._setMaxHeight(); |
| } |
| ngDoCheck() { |
| if (this._platform.isBrowser) { |
| this.resizeToFitContent(); |
| } |
| } |
| /** |
| * 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 = false) { |
| // If autosizing is disabled, just skip everything else |
| if (!this._enabled) { |
| return; |
| } |
| this._cacheTextareaLineHeight(); |
| // If we haven't determined the line-height yet, we know we're still hidden and there's no point |
| // in checking the height of the textarea. |
| if (!this._cachedLineHeight) { |
| return; |
| } |
| const textarea = this._elementRef.nativeElement; |
| const value = textarea.value; |
| // Only resize if the value or minRows have changed since these calculations can be expensive. |
| if (!force && this._minRows === this._previousMinRows && value === this._previousValue) { |
| return; |
| } |
| const placeholderText = textarea.placeholder; |
| // Reset the textarea height to auto in order to shrink back to its default size. |
| // Also temporarily force overflow:hidden, so scroll bars do not interfere with calculations. |
| // Long placeholders that are wider than the textarea width may lead to a bigger scrollHeight |
| // value. To ensure that the scrollHeight is not bigger than the content, the placeholders |
| // need to be removed temporarily. |
| textarea.classList.add(this._measuringClass); |
| textarea.placeholder = ''; |
| // The measuring class includes a 2px padding to workaround an issue with Chrome, |
| // so we account for that extra space here by subtracting 4 (2px top + 2px bottom). |
| const height = textarea.scrollHeight - 4; |
| // Use the scrollHeight to know how large the textarea *would* be if fit its entire value. |
| textarea.style.height = `${height}px`; |
| textarea.classList.remove(this._measuringClass); |
| textarea.placeholder = placeholderText; |
| this._ngZone.runOutsideAngular(() => { |
| if (typeof requestAnimationFrame !== 'undefined') { |
| requestAnimationFrame(() => this._scrollToCaretPosition(textarea)); |
| } |
| else { |
| setTimeout(() => this._scrollToCaretPosition(textarea)); |
| } |
| }); |
| this._previousValue = value; |
| this._previousMinRows = this._minRows; |
| } |
| /** |
| * Resets the textarea to its original size |
| */ |
| reset() { |
| // Do not try to change the textarea, if the initialHeight has not been determined yet |
| // This might potentially remove styles when reset() is called before ngAfterViewInit |
| if (this._initialHeight !== undefined) { |
| this._textareaElement.style.height = this._initialHeight; |
| } |
| } |
| // In Ivy the `host` metadata will be merged, whereas in ViewEngine it is overridden. In order |
| // to avoid double event listeners, we need to use `HostListener`. Once Ivy is the default, we |
| // can move this back into `host`. |
| // tslint:disable:no-host-decorator-in-concrete |
| _noopInputHandler() { |
| // no-op handler that ensures we're running change detection on input events. |
| } |
| /** Access injected document if available or fallback to global document reference */ |
| _getDocument() { |
| return this._document || document; |
| } |
| /** Use defaultView of injected document if available or fallback to global window reference */ |
| _getWindow() { |
| const doc = this._getDocument(); |
| return doc.defaultView || window; |
| } |
| /** |
| * 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. |
| */ |
| _scrollToCaretPosition(textarea) { |
| const { selectionStart, selectionEnd } = textarea; |
| const document = this._getDocument(); |
| // IE will throw an "Unspecified error" if we try to set the selection range after the |
| // element has been removed from the DOM. Assert that the directive hasn't been destroyed |
| // between the time we requested the animation frame and when it was executed. |
| // Also note that we have to assert that the textarea is focused before we set the |
| // selection range. Setting the selection range on a non-focused textarea will cause |
| // it to receive focus on IE and Edge. |
| if (!this._destroyed.isStopped && document.activeElement === textarea) { |
| textarea.setSelectionRange(selectionStart, selectionEnd); |
| } |
| } |
| } |
| CdkTextareaAutosize.decorators = [ |
| { type: Directive, args: [{ |
| selector: 'textarea[cdkTextareaAutosize]', |
| exportAs: 'cdkTextareaAutosize', |
| host: { |
| 'class': 'cdk-textarea-autosize', |
| // Textarea elements that have the directive applied should have a single row by default. |
| // Browsers normally show two rows by default and therefore this limits the minRows binding. |
| 'rows': '1', |
| }, |
| },] } |
| ]; |
| CdkTextareaAutosize.ctorParameters = () => [ |
| { type: ElementRef }, |
| { type: Platform }, |
| { type: NgZone }, |
| { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DOCUMENT,] }] } |
| ]; |
| CdkTextareaAutosize.propDecorators = { |
| minRows: [{ type: Input, args: ['cdkAutosizeMinRows',] }], |
| maxRows: [{ type: Input, args: ['cdkAutosizeMaxRows',] }], |
| enabled: [{ type: Input, args: ['cdkTextareaAutosize',] }], |
| _noopInputHandler: [{ type: HostListener, args: ['input',] }] |
| }; |
| |
| /** |
| * @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 |
| */ |
| class TextFieldModule { |
| } |
| TextFieldModule.decorators = [ |
| { type: NgModule, args: [{ |
| declarations: [CdkAutofill, CdkTextareaAutosize], |
| imports: [PlatformModule], |
| exports: [CdkAutofill, CdkTextareaAutosize], |
| },] } |
| ]; |
| |
| /** |
| * @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 |
| */ |
| |
| /** |
| * Generated bundle index. Do not edit. |
| */ |
| |
| export { AutofillMonitor, CdkAutofill, CdkTextareaAutosize, TextFieldModule }; |
| //# sourceMappingURL=text-field.js.map |
