ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
295 lines • 27 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import { Platform } from '@angular/cdk/platform';
import { Directive, ElementRef, Input, NgZone, Optional, Self } from '@angular/core';
import { NgControl } from '@angular/forms';
import { fromEvent, Subject } from 'rxjs';
import { auditTime, takeUntil } from 'rxjs/operators';
/**
* @record
*/
export function AutoSizeType() { }
if (false) {
/** @type {?|undefined} */
AutoSizeType.prototype.minRows;
/** @type {?|undefined} */
AutoSizeType.prototype.maxRows;
}
export class NzAutoResizeDirective {
/**
* @param {?} elementRef
* @param {?} ngZone
* @param {?} ngControl
* @param {?} platform
*/
constructor(elementRef, ngZone, ngControl, platform) {
this.elementRef = elementRef;
this.ngZone = ngZone;
this.ngControl = ngControl;
this.platform = platform;
this._autosize = false;
this.el = this.elementRef.nativeElement;
this.destroy$ = new Subject();
this.inputGap = 10;
}
/**
* @param {?} value
* @return {?}
*/
set nzAutosize(value) {
if (typeof value === 'string') {
this._autosize = true;
}
else if (typeof value !== 'boolean') {
this._autosize = value;
this.minRows = value.minRows;
this.maxRows = value.maxRows;
this.setMaxHeight();
this.setMinHeight();
}
}
/**
* @return {?}
*/
get nzAutosize() {
return this._autosize;
}
/**
* @param {?=} force
* @return {?}
*/
resizeToFitContent(force = false) {
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;
}
/** @type {?} */
const textarea = (/** @type {?} */ (this.el));
/** @type {?} */
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;
}
/** @type {?} */
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('cdk-textarea-autosize-measuring');
textarea.placeholder = '';
/** @type {?} */
const height = Math.round((textarea.scrollHeight - this.inputGap) / this.cachedLineHeight) * this.cachedLineHeight + this.inputGap;
// Use the scrollHeight to know how large the textarea *would* be if fit its entire value.
textarea.style.height = `${height}px`;
textarea.classList.remove('cdk-textarea-autosize-measuring');
textarea.placeholder = placeholderText;
// On Firefox resizing the textarea will prevent it from scrolling to the caret position.
// We need to re-set the selection in order for it to scroll to the proper position.
if (typeof requestAnimationFrame !== 'undefined') {
this.ngZone.runOutsideAngular((/**
* @return {?}
*/
() => requestAnimationFrame((/**
* @return {?}
*/
() => {
const { selectionStart, selectionEnd } = textarea;
// IE will throw an "Unspecified error" if we try to set the selection range after the
// element has been removed from the DOM. Assert that the directive hasn't been destroyed
// between the time we requested the animation frame and when it was executed.
// Also note that we have to assert that the textarea is focused before we set the
// selection range. Setting the selection range on a non-focused textarea will cause
// it to receive focus on IE and Edge.
if (!this.destroy$.isStopped && document.activeElement === textarea) {
textarea.setSelectionRange(selectionStart, selectionEnd);
}
}))));
}
this.previousValue = value;
this.previousMinRows = this.minRows;
}
/**
* @private
* @return {?}
*/
cacheTextareaLineHeight() {
if (this.cachedLineHeight) {
return;
}
// Use a clone element because we have to override some styles.
/** @type {?} */
const textareaClone = (/** @type {?} */ (this.el.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.el.parentNode.appendChild(textareaClone);
this.cachedLineHeight = textareaClone.clientHeight - this.inputGap - 1;
this.el.parentNode.removeChild(textareaClone);
// Min and max heights have to be re-calculated if the cached line height changes
this.setMinHeight();
this.setMaxHeight();
}
/**
* @return {?}
*/
setMinHeight() {
/** @type {?} */
const minHeight = this.minRows && this.cachedLineHeight ?
`${this.minRows * this.cachedLineHeight + this.inputGap}px` : null;
if (minHeight) {
this.el.style.minHeight = minHeight;
}
}
/**
* @return {?}
*/
setMaxHeight() {
/** @type {?} */
const maxHeight = this.maxRows && this.cachedLineHeight ?
`${this.maxRows * this.cachedLineHeight + this.inputGap}px` : null;
if (maxHeight) {
this.el.style.maxHeight = maxHeight;
}
}
/**
* @return {?}
*/
ngAfterViewInit() {
if (this.nzAutosize && this.platform.isBrowser) {
if (this.ngControl) {
this.resizeToFitContent();
this.ngZone.runOutsideAngular((/**
* @return {?}
*/
() => {
fromEvent(window, 'resize')
.pipe(auditTime(16), takeUntil(this.destroy$))
.subscribe((/**
* @return {?}
*/
() => this.resizeToFitContent(true)));
}));
this.ngControl.control.valueChanges.pipe(takeUntil(this.destroy$)).subscribe((/**
* @return {?}
*/
() => this.resizeToFitContent()));
}
else {
console.warn('nzAutosize must work with ngModel or ReactiveForm');
}
}
}
/**
* @return {?}
*/
ngOnDestroy() {
this.destroy$.next();
this.destroy$.complete();
}
}
NzAutoResizeDirective.decorators = [
{ type: Directive, args: [{
selector: 'textarea[nzAutosize]',
host: {
// 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'
}
},] }
];
/** @nocollapse */
NzAutoResizeDirective.ctorParameters = () => [
{ type: ElementRef },
{ type: NgZone },
{ type: NgControl, decorators: [{ type: Optional }, { type: Self }] },
{ type: Platform }
];
NzAutoResizeDirective.propDecorators = {
nzAutosize: [{ type: Input }]
};
if (false) {
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype._autosize;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.el;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.cachedLineHeight;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.previousValue;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.previousMinRows;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.minRows;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.maxRows;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.destroy$;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.inputGap;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.elementRef;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.ngZone;
/** @type {?} */
NzAutoResizeDirective.prototype.ngControl;
/**
* @type {?}
* @private
*/
NzAutoResizeDirective.prototype.platform;
}
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{ Platform } from '@angular/cdk/platform';\nimport {\n  AfterViewInit,\n  Directive,\n  ElementRef,\n  Input,\n  NgZone,\n  OnDestroy,\n  Optional,\n  Self\n} from '@angular/core';\nimport { NgControl } from '@angular/forms';\nimport { fromEvent, Subject } from 'rxjs';\nimport { auditTime, takeUntil } from 'rxjs/operators';\n\nexport interface AutoSizeType {\n  minRows?: number;\n  maxRows?: number;\n}\n\n@Directive({\n  selector: 'textarea[nzAutosize]',\n  host    : {\n    // Textarea elements that have the directive applied should have a single row by default.\n    // Browsers normally show two rows by default and therefore this limits the minRows binding.\n    rows: '1'\n  }\n})\nexport class NzAutoResizeDirective implements AfterViewInit, OnDestroy {\n  private _autosize: boolean | AutoSizeType = false;\n  private el: HTMLTextAreaElement | HTMLInputElement = this.elementRef.nativeElement;\n  private cachedLineHeight: number;\n  private previousValue: string;\n  private previousMinRows: number;\n  private minRows: number;\n  private maxRows: number;\n  private destroy$ = new Subject();\n  private inputGap = 10;\n\n  @Input()\n  set nzAutosize(value: string | boolean | AutoSizeType) {\n    if (typeof value === 'string') {\n      this._autosize = true;\n    } else if (typeof value !== 'boolean') {\n      this._autosize = value;\n      this.minRows = value.minRows;\n      this.maxRows = value.maxRows;\n      this.setMaxHeight();\n      this.setMinHeight();\n    }\n  }\n\n  get nzAutosize(): string | boolean | AutoSizeType {\n    return this._autosize;\n  }\n\n  resizeToFitContent(force: boolean = false): void {\n    this.cacheTextareaLineHeight();\n\n    // If we haven't determined the line-height yet, we know we're still hidden and there's no point\n    // in checking the height of the textarea.\n    if (!this.cachedLineHeight) {\n      return;\n    }\n\n    const textarea = this.el as HTMLTextAreaElement;\n    const value = textarea.value;\n\n    // Only resize if the value or minRows have changed since these calculations can be expensive.\n    if (!force && this.minRows === this.previousMinRows && value === this.previousValue) {\n      return;\n    }\n\n    const placeholderText = textarea.placeholder;\n\n    // Reset the textarea height to auto in order to shrink back to its default size.\n    // Also temporarily force overflow:hidden, so scroll bars do not interfere with calculations.\n    // Long placeholders that are wider than the textarea width may lead to a bigger scrollHeight\n    // value. To ensure that the scrollHeight is not bigger than the content, the placeholders\n    // need to be removed temporarily.\n    textarea.classList.add('cdk-textarea-autosize-measuring');\n    textarea.placeholder = '';\n    const height = Math.round((textarea.scrollHeight - this.inputGap) / this.cachedLineHeight) * this.cachedLineHeight + this.inputGap;\n\n    // Use the scrollHeight to know how large the textarea *would* be if fit its entire value.\n    textarea.style.height = `${height}px`;\n    textarea.classList.remove('cdk-textarea-autosize-measuring');\n    textarea.placeholder = placeholderText;\n\n    // On Firefox resizing the textarea will prevent it from scrolling to the caret position.\n    // We need to re-set the selection in order for it to scroll to the proper position.\n    if (typeof requestAnimationFrame !== 'undefined') {\n      this.ngZone.runOutsideAngular(() => requestAnimationFrame(() => {\n        const { selectionStart, selectionEnd } = textarea;\n\n        // IE will throw an \"Unspecified error\" if we try to set the selection range after the\n        // element has been removed from the DOM. Assert that the directive hasn't been destroyed\n        // between the time we requested the animation frame and when it was executed.\n        // Also note that we have to assert that the textarea is focused before we set the\n        // selection range. Setting the selection range on a non-focused textarea will cause\n        // it to receive focus on IE and Edge.\n        if (!this.destroy$.isStopped && document.activeElement === textarea) {\n          textarea.setSelectionRange(selectionStart, selectionEnd);\n        }\n      }));\n    }\n\n    this.previousValue = value;\n    this.previousMinRows = this.minRows;\n  }\n\n  private cacheTextareaLineHeight(): void {\n    if (this.cachedLineHeight) {\n      return;\n    }\n\n    // Use a clone element because we have to override some styles.\n    const textareaClone = this.el.cloneNode(false) as HTMLTextAreaElement;\n    textareaClone.rows = 1;\n\n    // Use `position: absolute` so that this doesn't cause a browser layout and use\n    // `visibility: hidden` so that nothing is rendered. Clear any other styles that\n    // would affect the height.\n    textareaClone.style.position = 'absolute';\n    textareaClone.style.visibility = 'hidden';\n    textareaClone.style.border = 'none';\n    textareaClone.style.padding = '0';\n    textareaClone.style.height = '';\n    textareaClone.style.minHeight = '';\n    textareaClone.style.maxHeight = '';\n\n    // In Firefox it happens that textarea elements are always bigger than the specified amount\n    // of rows. This is because Firefox tries to add extra space for the horizontal scrollbar.\n    // As a workaround that removes the extra space for the scrollbar, we can just set overflow\n    // to hidden. This ensures that there is no invalid calculation of the line height.\n    // See Firefox bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=33654\n    textareaClone.style.overflow = 'hidden';\n\n    this.el.parentNode.appendChild(textareaClone);\n    this.cachedLineHeight = textareaClone.clientHeight - this.inputGap - 1;\n    this.el.parentNode.removeChild(textareaClone);\n\n    // Min and max heights have to be re-calculated if the cached line height changes\n    this.setMinHeight();\n    this.setMaxHeight();\n  }\n\n  setMinHeight(): void {\n    const minHeight = this.minRows && this.cachedLineHeight ?\n      `${this.minRows * this.cachedLineHeight + this.inputGap}px` : null;\n\n    if (minHeight) {\n      this.el.style.minHeight = minHeight;\n    }\n  }\n\n  setMaxHeight(): void {\n    const maxHeight = this.maxRows && this.cachedLineHeight ?\n      `${this.maxRows * this.cachedLineHeight + this.inputGap}px` : null;\n\n    if (maxHeight) {\n      this.el.style.maxHeight = maxHeight;\n    }\n  }\n\n  constructor(private elementRef: ElementRef, private ngZone: NgZone, @Optional() @Self() public ngControl: NgControl, private platform: Platform) {\n  }\n\n  ngAfterViewInit(): void {\n    if (this.nzAutosize && this.platform.isBrowser) {\n      if (this.ngControl) {\n        this.resizeToFitContent();\n        this.ngZone.runOutsideAngular(() => {\n          fromEvent(window, 'resize')\n          .pipe(auditTime(16), takeUntil(this.destroy$))\n          .subscribe(() => this.resizeToFitContent(true));\n        });\n        this.ngControl.control.valueChanges.pipe(takeUntil(this.destroy$)).subscribe(() => this.resizeToFitContent());\n      } else {\n        console.warn('nzAutosize must work with ngModel or ReactiveForm');\n      }\n    }\n  }\n\n  ngOnDestroy(): void {\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n}\n"]}