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ng-zorro-antd

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An enterprise-class UI components based on Ant Design and Angular

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/** * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE */ import { DOWN_ARROW, ENTER, ESCAPE, TAB, UP_ARROW } from '@angular/cdk/keycodes'; import { ConnectionPositionPair, Overlay, OverlayConfig } from '@angular/cdk/overlay'; import { TemplatePortal } from '@angular/cdk/portal'; import { DOCUMENT } from '@angular/common'; import { Directive, ElementRef, forwardRef, Inject, Input, Optional, ViewContainerRef } from '@angular/core'; import { NG_VALUE_ACCESSOR } from '@angular/forms'; import { NzInputGroupWhitSuffixOrPrefixDirective } from 'ng-zorro-antd/input'; import { Subject } from 'rxjs'; import { delay, filter, takeUntil, tap } from 'rxjs/operators'; import { NzAutocompleteComponent } from './autocomplete.component'; export const NZ_AUTOCOMPLETE_VALUE_ACCESSOR = { provide: NG_VALUE_ACCESSOR, useExisting: forwardRef(() => NzAutocompleteTriggerDirective), multi: true }; export function getNzAutocompleteMissingPanelError() { return Error('Attempting to open an undefined instance of `nz-autocomplete`. ' + 'Make sure that the id passed to the `nzAutocomplete` is correct and that ' + "you're attempting to open it after the ngAfterContentInit hook."); } export class NzAutocompleteTriggerDirective { constructor(elementRef, overlay, viewContainerRef, nzInputGroupWhitSuffixOrPrefixDirective, document) { this.elementRef = elementRef; this.overlay = overlay; this.viewContainerRef = viewContainerRef; this.nzInputGroupWhitSuffixOrPrefixDirective = nzInputGroupWhitSuffixOrPrefixDirective; this.document = document; this.onChange = () => { }; this.onTouched = () => { }; this.panelOpen = false; this.destroy$ = new Subject(); this.overlayRef = null; this.portal = null; this.previousValue = null; } /** Current active option */ get activeOption() { if (this.nzAutocomplete && this.nzAutocomplete.options.length) { return this.nzAutocomplete.activeItem; } } ngAfterViewInit() { if (this.nzAutocomplete) { this.nzAutocomplete.animationStateChange.pipe(takeUntil(this.destroy$)).subscribe(event => { if (event.toState === 'void') { if (this.overlayRef) { this.overlayRef.dispose(); this.overlayRef = null; } } }); } } ngOnDestroy() { this.destroyPanel(); } writeValue(value) { Promise.resolve(null).then(() => this.setTriggerValue(value)); } registerOnChange(fn) { this.onChange = fn; } registerOnTouched(fn) { this.onTouched = fn; } setDisabledState(isDisabled) { const element = this.elementRef.nativeElement; element.disabled = isDisabled; this.closePanel(); } openPanel() { this.previousValue = this.elementRef.nativeElement.value; this.attachOverlay(); this.updateStatus(); } closePanel() { if (this.panelOpen) { this.nzAutocomplete.isOpen = this.panelOpen = false; if (this.overlayRef && this.overlayRef.hasAttached()) { this.overlayRef.detach(); this.selectionChangeSubscription.unsubscribe(); this.overlayOutsideClickSubscription.unsubscribe(); this.optionsChangeSubscription.unsubscribe(); this.portal = null; } } } handleKeydown(event) { const keyCode = event.keyCode; const isArrowKey = keyCode === UP_ARROW || keyCode === DOWN_ARROW; if (keyCode === ESCAPE) { event.preventDefault(); } if (this.panelOpen && (keyCode === ESCAPE || keyCode === TAB)) { // Reset value when tab / ESC close if (this.activeOption && this.activeOption.getLabel() !== this.previousValue) { this.setTriggerValue(this.previousValue); } this.closePanel(); } else if (this.panelOpen && keyCode === ENTER) { if (this.nzAutocomplete.showPanel && this.activeOption) { event.preventDefault(); this.activeOption.selectViaInteraction(); } } else if (this.panelOpen && isArrowKey && this.nzAutocomplete.showPanel) { event.stopPropagation(); event.preventDefault(); if (keyCode === UP_ARROW) { this.nzAutocomplete.setPreviousItemActive(); } else { this.nzAutocomplete.setNextItemActive(); } if (this.activeOption) { this.activeOption.scrollIntoViewIfNeeded(); } this.doBackfill(); } } handleInput(event) { const target = event.target; const document = this.document; let value = target.value; if (target.type === 'number') { value = value === '' ? null : parseFloat(value); } if (this.previousValue !== value) { this.previousValue = value; this.onChange(value); if (this.canOpen() && document.activeElement === event.target) { this.openPanel(); } } } handleFocus() { if (this.canOpen()) { this.openPanel(); } } handleBlur() { this.onTouched(); } /** * Subscription data source changes event */ subscribeOptionsChange() { const optionChanges = this.nzAutocomplete.options.changes.pipe(tap(() => this.positionStrategy.reapplyLastPosition()), delay(0)); return optionChanges.subscribe(() => { this.resetActiveItem(); if (this.panelOpen) { this.overlayRef.updatePosition(); } }); } /** * Subscription option changes event and set the value */ subscribeSelectionChange() { return this.nzAutocomplete.selectionChange.subscribe((option) => { this.setValueAndClose(option); }); } subscribeOverlayOutsideClick() { return this.overlayRef.outsidePointerEvents() .pipe(filter((e) => !this.elementRef.nativeElement.contains(e.target))) .subscribe(() => { this.closePanel(); }); } attachOverlay() { if (!this.nzAutocomplete) { throw getNzAutocompleteMissingPanelError(); } if (!this.portal && this.nzAutocomplete.template) { this.portal = new TemplatePortal(this.nzAutocomplete.template, this.viewContainerRef); } if (!this.overlayRef) { this.overlayRef = this.overlay.create(this.getOverlayConfig()); } if (this.overlayRef && !this.overlayRef.hasAttached()) { this.overlayRef.attach(this.portal); this.selectionChangeSubscription = this.subscribeSelectionChange(); this.optionsChangeSubscription = this.subscribeOptionsChange(); this.overlayOutsideClickSubscription = this.subscribeOverlayOutsideClick(); this.overlayRef .detachments() .pipe(takeUntil(this.destroy$)) .subscribe(() => { this.closePanel(); }); } this.nzAutocomplete.isOpen = this.panelOpen = true; } updateStatus() { if (this.overlayRef) { this.overlayRef.updateSize({ width: this.nzAutocomplete.nzWidth || this.getHostWidth() }); } this.nzAutocomplete.setVisibility(); this.resetActiveItem(); if (this.activeOption) { this.activeOption.scrollIntoViewIfNeeded(); } } destroyPanel() { if (this.overlayRef) { this.closePanel(); } } getOverlayConfig() { return new OverlayConfig({ positionStrategy: this.getOverlayPosition(), disposeOnNavigation: true, scrollStrategy: this.overlay.scrollStrategies.reposition(), // default host element width width: this.nzAutocomplete.nzWidth || this.getHostWidth() }); } getConnectedElement() { return this.nzInputGroupWhitSuffixOrPrefixDirective ? this.nzInputGroupWhitSuffixOrPrefixDirective.elementRef : this.elementRef; } getHostWidth() { return this.getConnectedElement().nativeElement.getBoundingClientRect().width; } getOverlayPosition() { const positions = [ new ConnectionPositionPair({ originX: 'start', originY: 'bottom' }, { overlayX: 'start', overlayY: 'top' }), new ConnectionPositionPair({ originX: 'start', originY: 'top' }, { overlayX: 'start', overlayY: 'bottom' }) ]; this.positionStrategy = this.overlay .position() .flexibleConnectedTo(this.getConnectedElement()) .withFlexibleDimensions(false) .withPush(false) .withPositions(positions) .withTransformOriginOn('.ant-select-dropdown'); return this.positionStrategy; } resetActiveItem() { const index = this.nzAutocomplete.getOptionIndex(this.previousValue); this.nzAutocomplete.clearSelectedOptions(null, true); if (index !== -1) { this.nzAutocomplete.setActiveItem(index); this.nzAutocomplete.activeItem.select(false); } else { this.nzAutocomplete.setActiveItem(this.nzAutocomplete.nzDefaultActiveFirstOption ? 0 : -1); } } setValueAndClose(option) { const value = option.nzValue; this.setTriggerValue(option.getLabel()); this.onChange(value); this.elementRef.nativeElement.focus(); this.closePanel(); } setTriggerValue(value) { const option = this.nzAutocomplete.getOption(value); const displayValue = option ? option.getLabel() : value; this.elementRef.nativeElement.value = displayValue != null ? displayValue : ''; if (!this.nzAutocomplete.nzBackfill) { this.previousValue = displayValue; } } doBackfill() { if (this.nzAutocomplete.nzBackfill && this.nzAutocomplete.activeItem) { this.setTriggerValue(this.nzAutocomplete.activeItem.getLabel()); } } canOpen() { const element = this.elementRef.nativeElement; return !element.readOnly && !element.disabled; } } NzAutocompleteTriggerDirective.decorators = [ { type: Directive, args: [{ selector: `input[nzAutocomplete], textarea[nzAutocomplete]`, exportAs: 'nzAutocompleteTrigger', providers: [NZ_AUTOCOMPLETE_VALUE_ACCESSOR], host: { autocomplete: 'off', 'aria-autocomplete': 'list', '(focusin)': 'handleFocus()', '(blur)': 'handleBlur()', '(input)': 'handleInput($event)', '(keydown)': 'handleKeydown($event)' } },] } ]; NzAutocompleteTriggerDirective.ctorParameters = () => [ { type: ElementRef }, { type: Overlay }, { type: ViewContainerRef }, { type: NzInputGroupWhitSuffixOrPrefixDirective, decorators: [{ type: Optional }] }, { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DOCUMENT,] }] } ]; NzAutocompleteTriggerDirective.propDecorators = { nzAutocomplete: [{ type: Input }] }; //# 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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport { DOWN_ARROW, ENTER, ESCAPE, TAB, UP_ARROW } from '@angular/cdk/keycodes';\nimport {\n  ConnectionPositionPair,\n  FlexibleConnectedPositionStrategy,\n  Overlay,\n  OverlayConfig,\n  OverlayRef,\n  PositionStrategy\n} from '@angular/cdk/overlay';\nimport { TemplatePortal } from '@angular/cdk/portal';\nimport { DOCUMENT } from '@angular/common';\nimport {\n  AfterViewInit,\n  Directive,\n  ElementRef,\n  ExistingProvider,\n  forwardRef,\n  Inject,\n  Input,\n  OnDestroy,\n  Optional,\n  ViewContainerRef\n} from '@angular/core';\nimport { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms';\nimport { NzSafeAny, OnChangeType, OnTouchedType } from 'ng-zorro-antd/core/types';\nimport { NzInputGroupWhitSuffixOrPrefixDirective } from 'ng-zorro-antd/input';\n\nimport { Subject, Subscription } from 'rxjs';\nimport { delay, filter, takeUntil, tap } from 'rxjs/operators';\n\nimport { NzAutocompleteOptionComponent } from './autocomplete-option.component';\nimport { NzAutocompleteComponent } from './autocomplete.component';\n\nexport const NZ_AUTOCOMPLETE_VALUE_ACCESSOR: ExistingProvider = {\n  provide: NG_VALUE_ACCESSOR,\n  useExisting: forwardRef(() => NzAutocompleteTriggerDirective),\n  multi: true\n};\n\nexport function getNzAutocompleteMissingPanelError(): Error {\n  return Error(\n    'Attempting to open an undefined instance of `nz-autocomplete`. ' +\n      'Make sure that the id passed to the `nzAutocomplete` is correct and that ' +\n      \"you're attempting to open it after the ngAfterContentInit hook.\"\n  );\n}\n\n@Directive({\n  selector: `input[nzAutocomplete], textarea[nzAutocomplete]`,\n  exportAs: 'nzAutocompleteTrigger',\n  providers: [NZ_AUTOCOMPLETE_VALUE_ACCESSOR],\n  host: {\n    autocomplete: 'off',\n    'aria-autocomplete': 'list',\n    '(focusin)': 'handleFocus()',\n    '(blur)': 'handleBlur()',\n    '(input)': 'handleInput($event)',\n    '(keydown)': 'handleKeydown($event)'\n  }\n})\nexport class NzAutocompleteTriggerDirective implements AfterViewInit, ControlValueAccessor, OnDestroy {\n  /** Bind nzAutocomplete component */\n  @Input() nzAutocomplete!: NzAutocompleteComponent;\n\n  onChange: OnChangeType = () => {};\n  onTouched: OnTouchedType = () => {};\n  panelOpen: boolean = false;\n\n  /** Current active option */\n  get activeOption(): NzAutocompleteOptionComponent | void {\n    if (this.nzAutocomplete && this.nzAutocomplete.options.length) {\n      return this.nzAutocomplete.activeItem;\n    }\n  }\n\n  private destroy$ = new Subject<void>();\n  private overlayRef: OverlayRef | null = null;\n  private portal: TemplatePortal<{}> | null = null;\n  private positionStrategy!: FlexibleConnectedPositionStrategy;\n  private previousValue: string | number | null = null;\n  private selectionChangeSubscription!: Subscription;\n  private optionsChangeSubscription!: Subscription;\n  private overlayOutsideClickSubscription!: Subscription;\n\n  constructor(\n    private elementRef: ElementRef,\n    private overlay: Overlay,\n    private viewContainerRef: ViewContainerRef,\n    @Optional() private nzInputGroupWhitSuffixOrPrefixDirective: NzInputGroupWhitSuffixOrPrefixDirective,\n    @Optional() @Inject(DOCUMENT) private document: NzSafeAny\n  ) {}\n\n  ngAfterViewInit(): void {\n    if (this.nzAutocomplete) {\n      this.nzAutocomplete.animationStateChange.pipe(takeUntil(this.destroy$)).subscribe(event => {\n        if (event.toState === 'void') {\n          if (this.overlayRef) {\n            this.overlayRef.dispose();\n            this.overlayRef = null;\n          }\n        }\n      });\n    }\n  }\n\n  ngOnDestroy(): void {\n    this.destroyPanel();\n  }\n\n  writeValue(value: NzSafeAny): void {\n    Promise.resolve(null).then(() => this.setTriggerValue(value));\n  }\n\n  registerOnChange(fn: (value: {}) => {}): void {\n    this.onChange = fn;\n  }\n\n  registerOnTouched(fn: () => {}): void {\n    this.onTouched = fn;\n  }\n\n  setDisabledState(isDisabled: boolean): void {\n    const element: HTMLInputElement = this.elementRef.nativeElement;\n    element.disabled = isDisabled;\n    this.closePanel();\n  }\n\n  openPanel(): void {\n    this.previousValue = this.elementRef.nativeElement.value;\n    this.attachOverlay();\n    this.updateStatus();\n  }\n\n  closePanel(): void {\n    if (this.panelOpen) {\n      this.nzAutocomplete.isOpen = this.panelOpen = false;\n\n      if (this.overlayRef && this.overlayRef.hasAttached()) {\n        this.overlayRef.detach();\n        this.selectionChangeSubscription.unsubscribe();\n        this.overlayOutsideClickSubscription.unsubscribe();\n        this.optionsChangeSubscription.unsubscribe();\n        this.portal = null;\n      }\n    }\n  }\n\n  handleKeydown(event: KeyboardEvent): void {\n    const keyCode = event.keyCode;\n    const isArrowKey = keyCode === UP_ARROW || keyCode === DOWN_ARROW;\n\n    if (keyCode === ESCAPE) {\n      event.preventDefault();\n    }\n\n    if (this.panelOpen && (keyCode === ESCAPE || keyCode === TAB)) {\n      // Reset value when tab / ESC close\n      if (this.activeOption && this.activeOption.getLabel() !== this.previousValue) {\n        this.setTriggerValue(this.previousValue);\n      }\n      this.closePanel();\n    } else if (this.panelOpen && keyCode === ENTER) {\n      if (this.nzAutocomplete.showPanel && this.activeOption) {\n        event.preventDefault();\n        this.activeOption.selectViaInteraction();\n      }\n    } else if (this.panelOpen && isArrowKey && this.nzAutocomplete.showPanel) {\n      event.stopPropagation();\n      event.preventDefault();\n      if (keyCode === UP_ARROW) {\n        this.nzAutocomplete.setPreviousItemActive();\n      } else {\n        this.nzAutocomplete.setNextItemActive();\n      }\n      if (this.activeOption) {\n        this.activeOption.scrollIntoViewIfNeeded();\n      }\n      this.doBackfill();\n    }\n  }\n\n  handleInput(event: KeyboardEvent): void {\n    const target = event.target as HTMLInputElement;\n    const document = this.document as Document;\n    let value: number | string | null = target.value;\n\n    if (target.type === 'number') {\n      value = value === '' ? null : parseFloat(value);\n    }\n    if (this.previousValue !== value) {\n      this.previousValue = value;\n      this.onChange(value);\n\n      if (this.canOpen() && document.activeElement === event.target) {\n        this.openPanel();\n      }\n    }\n  }\n\n  handleFocus(): void {\n    if (this.canOpen()) {\n      this.openPanel();\n    }\n  }\n\n  handleBlur(): void {\n    this.onTouched();\n  }\n\n  /**\n   * Subscription data source changes event\n   */\n  private subscribeOptionsChange(): Subscription {\n    const optionChanges = this.nzAutocomplete.options.changes.pipe(\n      tap(() => this.positionStrategy.reapplyLastPosition()),\n      delay(0)\n    );\n    return optionChanges.subscribe(() => {\n      this.resetActiveItem();\n      if (this.panelOpen) {\n        this.overlayRef!.updatePosition();\n      }\n    });\n  }\n\n  /**\n   * Subscription option changes event and set the value\n   */\n  private subscribeSelectionChange(): Subscription {\n    return this.nzAutocomplete.selectionChange.subscribe((option: NzAutocompleteOptionComponent) => {\n      this.setValueAndClose(option);\n    });\n  }\n\n  private subscribeOverlayOutsideClick(): Subscription {\n    return this.overlayRef!.outsidePointerEvents()\n      .pipe(filter((e: MouseEvent) => !this.elementRef.nativeElement.contains(e.target)))\n      .subscribe(() => {\n        this.closePanel();\n      });\n  }\n\n  private attachOverlay(): void {\n    if (!this.nzAutocomplete) {\n      throw getNzAutocompleteMissingPanelError();\n    }\n\n    if (!this.portal && this.nzAutocomplete.template) {\n      this.portal = new TemplatePortal(this.nzAutocomplete.template, this.viewContainerRef);\n    }\n\n    if (!this.overlayRef) {\n      this.overlayRef = this.overlay.create(this.getOverlayConfig());\n    }\n\n    if (this.overlayRef && !this.overlayRef.hasAttached()) {\n      this.overlayRef.attach(this.portal);\n      this.selectionChangeSubscription = this.subscribeSelectionChange();\n      this.optionsChangeSubscription = this.subscribeOptionsChange();\n      this.overlayOutsideClickSubscription = this.subscribeOverlayOutsideClick();\n      this.overlayRef\n        .detachments()\n        .pipe(takeUntil(this.destroy$))\n        .subscribe(() => {\n          this.closePanel();\n        });\n    }\n    this.nzAutocomplete.isOpen = this.panelOpen = true;\n  }\n\n  private updateStatus(): void {\n    if (this.overlayRef) {\n      this.overlayRef.updateSize({ width: this.nzAutocomplete.nzWidth || this.getHostWidth() });\n    }\n    this.nzAutocomplete.setVisibility();\n    this.resetActiveItem();\n    if (this.activeOption) {\n      this.activeOption.scrollIntoViewIfNeeded();\n    }\n  }\n\n  private destroyPanel(): void {\n    if (this.overlayRef) {\n      this.closePanel();\n    }\n  }\n\n  private getOverlayConfig(): OverlayConfig {\n    return new OverlayConfig({\n      positionStrategy: this.getOverlayPosition(),\n      disposeOnNavigation: true,\n      scrollStrategy: this.overlay.scrollStrategies.reposition(),\n      // default host element width\n      width: this.nzAutocomplete.nzWidth || this.getHostWidth()\n    });\n  }\n\n  private getConnectedElement(): ElementRef {\n    return this.nzInputGroupWhitSuffixOrPrefixDirective ? this.nzInputGroupWhitSuffixOrPrefixDirective.elementRef : this.elementRef;\n  }\n\n  private getHostWidth(): number {\n    return this.getConnectedElement().nativeElement.getBoundingClientRect().width;\n  }\n\n  private getOverlayPosition(): PositionStrategy {\n    const positions = [\n      new ConnectionPositionPair({ originX: 'start', originY: 'bottom' }, { overlayX: 'start', overlayY: 'top' }),\n      new ConnectionPositionPair({ originX: 'start', originY: 'top' }, { overlayX: 'start', overlayY: 'bottom' })\n    ];\n    this.positionStrategy = this.overlay\n      .position()\n      .flexibleConnectedTo(this.getConnectedElement())\n      .withFlexibleDimensions(false)\n      .withPush(false)\n      .withPositions(positions)\n      .withTransformOriginOn('.ant-select-dropdown');\n    return this.positionStrategy;\n  }\n\n  private resetActiveItem(): void {\n    const index = this.nzAutocomplete.getOptionIndex(this.previousValue);\n    this.nzAutocomplete.clearSelectedOptions(null, true);\n    if (index !== -1) {\n      this.nzAutocomplete.setActiveItem(index);\n      this.nzAutocomplete.activeItem.select(false);\n    } else {\n      this.nzAutocomplete.setActiveItem(this.nzAutocomplete.nzDefaultActiveFirstOption ? 0 : -1);\n    }\n  }\n\n  private setValueAndClose(option: NzAutocompleteOptionComponent): void {\n    const value = option.nzValue;\n    this.setTriggerValue(option.getLabel());\n    this.onChange(value);\n    this.elementRef.nativeElement.focus();\n    this.closePanel();\n  }\n\n  private setTriggerValue(value: NzSafeAny): void {\n    const option = this.nzAutocomplete.getOption(value);\n    const displayValue = option ? option.getLabel() : value;\n    this.elementRef.nativeElement.value = displayValue != null ? displayValue : '';\n    if (!this.nzAutocomplete.nzBackfill) {\n      this.previousValue = displayValue;\n    }\n  }\n\n  private doBackfill(): void {\n    if (this.nzAutocomplete.nzBackfill && this.nzAutocomplete.activeItem) {\n      this.setTriggerValue(this.nzAutocomplete.activeItem.getLabel());\n    }\n  }\n\n  private canOpen(): boolean {\n    const element: HTMLInputElement = this.elementRef.nativeElement;\n    return !element.readOnly && !element.disabled;\n  }\n}\n"]}