| import { ActiveDescendantKeyManager } from '@angular/cdk/a11y'; |
| import { coerceBooleanProperty, coerceStringArray } from '@angular/cdk/coercion'; |
| import { Platform, _getShadowRoot } from '@angular/cdk/platform'; |
| import { InjectionToken, EventEmitter, Directive, ChangeDetectorRef, ElementRef, Inject, ViewChild, TemplateRef, Input, Output, Component, ViewEncapsulation, ChangeDetectionStrategy, ContentChildren, forwardRef, ViewContainerRef, NgZone, Optional, Host, NgModule } from '@angular/core'; |
| import { mixinDisableRipple, MAT_OPTION_PARENT_COMPONENT, MAT_OPTGROUP, MatOption, MatOptionSelectionChange, _countGroupLabelsBeforeOption, _getOptionScrollPosition, MatOptionModule, MatCommonModule } from '@angular/material/core'; |
| import { Subscription, Subject, defer, merge, of, fromEvent } from 'rxjs'; |
| import { DOCUMENT, CommonModule } from '@angular/common'; |
| import { Overlay, OverlayConfig, OverlayModule } from '@angular/cdk/overlay'; |
| import { ViewportRuler, CdkScrollableModule } from '@angular/cdk/scrolling'; |
| import { Directionality } from '@angular/cdk/bidi'; |
| import { ESCAPE, hasModifierKey, ENTER, UP_ARROW, DOWN_ARROW, TAB } from '@angular/cdk/keycodes'; |
| import { TemplatePortal } from '@angular/cdk/portal'; |
| import { NG_VALUE_ACCESSOR } from '@angular/forms'; |
| import { MatFormField, MAT_FORM_FIELD } from '@angular/material/form-field'; |
| import { take, switchMap, filter, map, tap, delay } from 'rxjs/operators'; |
| |
| /** |
| * @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 |
| */ |
| /** |
| * Autocomplete IDs need to be unique across components, so this counter exists outside of |
| * the component definition. |
| */ |
| let _uniqueAutocompleteIdCounter = 0; |
| /** Event object that is emitted when an autocomplete option is selected. */ |
| class MatAutocompleteSelectedEvent { |
| constructor( |
| /** Reference to the autocomplete panel that emitted the event. */ |
| source, |
| /** Option that was selected. */ |
| option) { |
| this.source = source; |
| this.option = option; |
| } |
| } |
| // Boilerplate for applying mixins to MatAutocomplete. |
| /** @docs-private */ |
| class MatAutocompleteBase { |
| } |
| const _MatAutocompleteMixinBase = mixinDisableRipple(MatAutocompleteBase); |
| /** Injection token to be used to override the default options for `mat-autocomplete`. */ |
| const MAT_AUTOCOMPLETE_DEFAULT_OPTIONS = new InjectionToken('mat-autocomplete-default-options', { |
| providedIn: 'root', |
| factory: MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY, |
| }); |
| /** @docs-private */ |
| function MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY() { |
| return { autoActiveFirstOption: false }; |
| } |
| /** Base class with all of the `MatAutocomplete` functionality. */ |
| class _MatAutocompleteBase extends _MatAutocompleteMixinBase { |
| constructor(_changeDetectorRef, _elementRef, defaults, platform) { |
| super(); |
| this._changeDetectorRef = _changeDetectorRef; |
| this._elementRef = _elementRef; |
| this._activeOptionChanges = Subscription.EMPTY; |
| /** Whether the autocomplete panel should be visible, depending on option length. */ |
| this.showPanel = false; |
| this._isOpen = false; |
| /** Function that maps an option's control value to its display value in the trigger. */ |
| this.displayWith = null; |
| /** Event that is emitted whenever an option from the list is selected. */ |
| this.optionSelected = new EventEmitter(); |
| /** Event that is emitted when the autocomplete panel is opened. */ |
| this.opened = new EventEmitter(); |
| /** Event that is emitted when the autocomplete panel is closed. */ |
| this.closed = new EventEmitter(); |
| /** Emits whenever an option is activated using the keyboard. */ |
| this.optionActivated = new EventEmitter(); |
| this._classList = {}; |
| /** Unique ID to be used by autocomplete trigger's "aria-owns" property. */ |
| this.id = `mat-autocomplete-${_uniqueAutocompleteIdCounter++}`; |
| // TODO(crisbeto): the problem that the `inertGroups` option resolves is only present on |
| // Safari using VoiceOver. We should occasionally check back to see whether the bug |
| // wasn't resolved in VoiceOver, and if it has, we can remove this and the `inertGroups` |
| // option altogether. |
| this.inertGroups = (platform === null || platform === void 0 ? void 0 : platform.SAFARI) || false; |
| this._autoActiveFirstOption = !!defaults.autoActiveFirstOption; |
| } |
| /** Whether the autocomplete panel is open. */ |
| get isOpen() { return this._isOpen && this.showPanel; } |
| /** |
| * Whether the first option should be highlighted when the autocomplete panel is opened. |
| * Can be configured globally through the `MAT_AUTOCOMPLETE_DEFAULT_OPTIONS` token. |
| */ |
| get autoActiveFirstOption() { return this._autoActiveFirstOption; } |
| set autoActiveFirstOption(value) { |
| this._autoActiveFirstOption = coerceBooleanProperty(value); |
| } |
| /** |
| * Takes classes set on the host mat-autocomplete element and applies them to the panel |
| * inside the overlay container to allow for easy styling. |
| */ |
| set classList(value) { |
| if (value && value.length) { |
| this._classList = coerceStringArray(value).reduce((classList, className) => { |
| classList[className] = true; |
| return classList; |
| }, {}); |
| } |
| else { |
| this._classList = {}; |
| } |
| this._setVisibilityClasses(this._classList); |
| this._elementRef.nativeElement.className = ''; |
| } |
| ngAfterContentInit() { |
| this._keyManager = new ActiveDescendantKeyManager(this.options).withWrap(); |
| this._activeOptionChanges = this._keyManager.change.subscribe(index => { |
| this.optionActivated.emit({ source: this, option: this.options.toArray()[index] || null }); |
| }); |
| // Set the initial visibility state. |
| this._setVisibility(); |
| } |
| ngOnDestroy() { |
| this._activeOptionChanges.unsubscribe(); |
| } |
| /** |
| * Sets the panel scrollTop. This allows us to manually scroll to display options |
| * above or below the fold, as they are not actually being focused when active. |
| */ |
| _setScrollTop(scrollTop) { |
| if (this.panel) { |
| this.panel.nativeElement.scrollTop = scrollTop; |
| } |
| } |
| /** Returns the panel's scrollTop. */ |
| _getScrollTop() { |
| return this.panel ? this.panel.nativeElement.scrollTop : 0; |
| } |
| /** Panel should hide itself when the option list is empty. */ |
| _setVisibility() { |
| this.showPanel = !!this.options.length; |
| this._setVisibilityClasses(this._classList); |
| this._changeDetectorRef.markForCheck(); |
| } |
| /** Emits the `select` event. */ |
| _emitSelectEvent(option) { |
| const event = new MatAutocompleteSelectedEvent(this, option); |
| this.optionSelected.emit(event); |
| } |
| /** Gets the aria-labelledby for the autocomplete panel. */ |
| _getPanelAriaLabelledby(labelId) { |
| if (this.ariaLabel) { |
| return null; |
| } |
| const labelExpression = labelId ? labelId + ' ' : ''; |
| return this.ariaLabelledby ? labelExpression + this.ariaLabelledby : labelId; |
| } |
| /** Sets the autocomplete visibility classes on a classlist based on the panel is visible. */ |
| _setVisibilityClasses(classList) { |
| classList[this._visibleClass] = this.showPanel; |
| classList[this._hiddenClass] = !this.showPanel; |
| } |
| } |
| _MatAutocompleteBase.decorators = [ |
| { type: Directive } |
| ]; |
| _MatAutocompleteBase.ctorParameters = () => [ |
| { type: ChangeDetectorRef }, |
| { type: ElementRef }, |
| { type: undefined, decorators: [{ type: Inject, args: [MAT_AUTOCOMPLETE_DEFAULT_OPTIONS,] }] }, |
| { type: Platform } |
| ]; |
| _MatAutocompleteBase.propDecorators = { |
| template: [{ type: ViewChild, args: [TemplateRef, { static: true },] }], |
| panel: [{ type: ViewChild, args: ['panel',] }], |
| ariaLabel: [{ type: Input, args: ['aria-label',] }], |
| ariaLabelledby: [{ type: Input, args: ['aria-labelledby',] }], |
| displayWith: [{ type: Input }], |
| autoActiveFirstOption: [{ type: Input }], |
| panelWidth: [{ type: Input }], |
| optionSelected: [{ type: Output }], |
| opened: [{ type: Output }], |
| closed: [{ type: Output }], |
| optionActivated: [{ type: Output }], |
| classList: [{ type: Input, args: ['class',] }] |
| }; |
| class MatAutocomplete extends _MatAutocompleteBase { |
| constructor() { |
| super(...arguments); |
| this._visibleClass = 'mat-autocomplete-visible'; |
| this._hiddenClass = 'mat-autocomplete-hidden'; |
| } |
| } |
| MatAutocomplete.decorators = [ |
| { type: Component, args: [{ |
| selector: 'mat-autocomplete', |
| template: "<ng-template let-formFieldId=\"id\">\n <div class=\"mat-autocomplete-panel\"\n role=\"listbox\"\n [id]=\"id\"\n [attr.aria-label]=\"ariaLabel || null\"\n [attr.aria-labelledby]=\"_getPanelAriaLabelledby(formFieldId)\"\n [ngClass]=\"_classList\"\n #panel>\n <ng-content></ng-content>\n </div>\n</ng-template>\n", |
| encapsulation: ViewEncapsulation.None, |
| changeDetection: ChangeDetectionStrategy.OnPush, |
| exportAs: 'matAutocomplete', |
| inputs: ['disableRipple'], |
| host: { |
| 'class': 'mat-autocomplete' |
| }, |
| providers: [ |
| { provide: MAT_OPTION_PARENT_COMPONENT, useExisting: MatAutocomplete } |
| ], |
| styles: [".mat-autocomplete-panel{min-width:112px;max-width:280px;overflow:auto;-webkit-overflow-scrolling:touch;visibility:hidden;max-width:none;max-height:256px;position:relative;width:100%;border-bottom-left-radius:4px;border-bottom-right-radius:4px}.mat-autocomplete-panel.mat-autocomplete-visible{visibility:visible}.mat-autocomplete-panel.mat-autocomplete-hidden{visibility:hidden}.mat-autocomplete-panel-above .mat-autocomplete-panel{border-radius:0;border-top-left-radius:4px;border-top-right-radius:4px}.mat-autocomplete-panel .mat-divider-horizontal{margin-top:-1px}.cdk-high-contrast-active .mat-autocomplete-panel{outline:solid 1px}mat-autocomplete{display:none}\n"] |
| },] } |
| ]; |
| MatAutocomplete.propDecorators = { |
| optionGroups: [{ type: ContentChildren, args: [MAT_OPTGROUP, { descendants: true },] }], |
| options: [{ type: ContentChildren, args: [MatOption, { descendants: true },] }] |
| }; |
| |
| /** |
| * @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 |
| */ |
| /** Base class containing all of the functionality for `MatAutocompleteOrigin`. */ |
| class _MatAutocompleteOriginBase { |
| constructor( |
| /** Reference to the element on which the directive is applied. */ |
| elementRef) { |
| this.elementRef = elementRef; |
| } |
| } |
| _MatAutocompleteOriginBase.decorators = [ |
| { type: Directive } |
| ]; |
| _MatAutocompleteOriginBase.ctorParameters = () => [ |
| { type: ElementRef } |
| ]; |
| /** |
| * Directive applied to an element to make it usable |
| * as a connection point for an autocomplete panel. |
| */ |
| class MatAutocompleteOrigin extends _MatAutocompleteOriginBase { |
| } |
| MatAutocompleteOrigin.decorators = [ |
| { type: Directive, args: [{ |
| selector: '[matAutocompleteOrigin]', |
| exportAs: 'matAutocompleteOrigin', |
| },] } |
| ]; |
| |
| /** |
| * @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 |
| */ |
| /** |
| * The following style constants are necessary to save here in order |
| * to properly calculate the scrollTop of the panel. Because we are not |
| * actually focusing the active item, scroll must be handled manually. |
| */ |
| /** |
| * The height of each autocomplete option. |
| * @deprecated No longer being used. To be removed. |
| * @breaking-change 12.0.0 |
| */ |
| const AUTOCOMPLETE_OPTION_HEIGHT = 48; |
| /** |
| * The total height of the autocomplete panel. |
| * @deprecated No longer being used. To be removed. |
| * @breaking-change 12.0.0 |
| */ |
| const AUTOCOMPLETE_PANEL_HEIGHT = 256; |
| /** Injection token that determines the scroll handling while the autocomplete panel is open. */ |
| const MAT_AUTOCOMPLETE_SCROLL_STRATEGY = new InjectionToken('mat-autocomplete-scroll-strategy'); |
| /** @docs-private */ |
| function MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY(overlay) { |
| return () => overlay.scrollStrategies.reposition(); |
| } |
| /** @docs-private */ |
| const MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER = { |
| provide: MAT_AUTOCOMPLETE_SCROLL_STRATEGY, |
| deps: [Overlay], |
| useFactory: MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY, |
| }; |
| /** |
| * Provider that allows the autocomplete to register as a ControlValueAccessor. |
| * @docs-private |
| */ |
| const MAT_AUTOCOMPLETE_VALUE_ACCESSOR = { |
| provide: NG_VALUE_ACCESSOR, |
| useExisting: forwardRef(() => MatAutocompleteTrigger), |
| multi: true |
| }; |
| /** |
| * Creates an error to be thrown when attempting to use an autocomplete trigger without a panel. |
| * @docs-private |
| */ |
| function getMatAutocompleteMissingPanelError() { |
| return Error('Attempting to open an undefined instance of `mat-autocomplete`. ' + |
| 'Make sure that the id passed to the `matAutocomplete` is correct and that ' + |
| 'you\'re attempting to open it after the ngAfterContentInit hook.'); |
| } |
| /** Base class with all of the `MatAutocompleteTrigger` functionality. */ |
| class _MatAutocompleteTriggerBase { |
| constructor(_element, _overlay, _viewContainerRef, _zone, _changeDetectorRef, scrollStrategy, _dir, _formField, _document, _viewportRuler, _defaults) { |
| this._element = _element; |
| this._overlay = _overlay; |
| this._viewContainerRef = _viewContainerRef; |
| this._zone = _zone; |
| this._changeDetectorRef = _changeDetectorRef; |
| this._dir = _dir; |
| this._formField = _formField; |
| this._document = _document; |
| this._viewportRuler = _viewportRuler; |
| this._defaults = _defaults; |
| this._componentDestroyed = false; |
| this._autocompleteDisabled = false; |
| /** Whether or not the label state is being overridden. */ |
| this._manuallyFloatingLabel = false; |
| /** Subscription to viewport size changes. */ |
| this._viewportSubscription = Subscription.EMPTY; |
| /** |
| * Whether the autocomplete can open the next time it is focused. Used to prevent a focused, |
| * closed autocomplete from being reopened if the user switches to another browser tab and then |
| * comes back. |
| */ |
| this._canOpenOnNextFocus = true; |
| /** Stream of keyboard events that can close the panel. */ |
| this._closeKeyEventStream = new Subject(); |
| /** |
| * Event handler for when the window is blurred. Needs to be an |
| * arrow function in order to preserve the context. |
| */ |
| this._windowBlurHandler = () => { |
| // If the user blurred the window while the autocomplete is focused, it means that it'll be |
| // refocused when they come back. In this case we want to skip the first focus event, if the |
| // pane was closed, in order to avoid reopening it unintentionally. |
| this._canOpenOnNextFocus = |
| this._document.activeElement !== this._element.nativeElement || this.panelOpen; |
| }; |
| /** `View -> model callback called when value changes` */ |
| this._onChange = () => { }; |
| /** `View -> model callback called when autocomplete has been touched` */ |
| this._onTouched = () => { }; |
| /** |
| * Position of the autocomplete panel relative to the trigger element. A position of `auto` |
| * will render the panel underneath the trigger if there is enough space for it to fit in |
| * the viewport, otherwise the panel will be shown above it. If the position is set to |
| * `above` or `below`, the panel will always be shown above or below the trigger. no matter |
| * whether it fits completely in the viewport. |
| */ |
| this.position = 'auto'; |
| /** |
| * `autocomplete` attribute to be set on the input element. |
| * @docs-private |
| */ |
| this.autocompleteAttribute = 'off'; |
| this._overlayAttached = false; |
| /** Stream of autocomplete option selections. */ |
| this.optionSelections = defer(() => { |
| if (this.autocomplete && this.autocomplete.options) { |
| return merge(...this.autocomplete.options.map(option => option.onSelectionChange)); |
| } |
| // If there are any subscribers before `ngAfterViewInit`, the `autocomplete` will be undefined. |
| // Return a stream that we'll replace with the real one once everything is in place. |
| return this._zone.onStable |
| .pipe(take(1), switchMap(() => this.optionSelections)); |
| }); |
| this._scrollStrategy = scrollStrategy; |
| } |
| /** |
| * Whether the autocomplete is disabled. When disabled, the element will |
| * act as a regular input and the user won't be able to open the panel. |
| */ |
| get autocompleteDisabled() { return this._autocompleteDisabled; } |
| set autocompleteDisabled(value) { |
| this._autocompleteDisabled = coerceBooleanProperty(value); |
| } |
| ngAfterViewInit() { |
| const window = this._getWindow(); |
| if (typeof window !== 'undefined') { |
| this._zone.runOutsideAngular(() => window.addEventListener('blur', this._windowBlurHandler)); |
| } |
| } |
| ngOnChanges(changes) { |
| if (changes['position'] && this._positionStrategy) { |
| this._setStrategyPositions(this._positionStrategy); |
| if (this.panelOpen) { |
| this._overlayRef.updatePosition(); |
| } |
| } |
| } |
| ngOnDestroy() { |
| const window = this._getWindow(); |
| if (typeof window !== 'undefined') { |
| window.removeEventListener('blur', this._windowBlurHandler); |
| } |
| this._viewportSubscription.unsubscribe(); |
| this._componentDestroyed = true; |
| this._destroyPanel(); |
| this._closeKeyEventStream.complete(); |
| } |
| /** Whether or not the autocomplete panel is open. */ |
| get panelOpen() { |
| return this._overlayAttached && this.autocomplete.showPanel; |
| } |
| /** Opens the autocomplete suggestion panel. */ |
| openPanel() { |
| this._attachOverlay(); |
| this._floatLabel(); |
| } |
| /** Closes the autocomplete suggestion panel. */ |
| closePanel() { |
| this._resetLabel(); |
| if (!this._overlayAttached) { |
| return; |
| } |
| if (this.panelOpen) { |
| // Only emit if the panel was visible. |
| this.autocomplete.closed.emit(); |
| } |
| this.autocomplete._isOpen = this._overlayAttached = false; |
| if (this._overlayRef && this._overlayRef.hasAttached()) { |
| this._overlayRef.detach(); |
| this._closingActionsSubscription.unsubscribe(); |
| } |
| // Note that in some cases this can end up being called after the component is destroyed. |
| // Add a check to ensure that we don't try to run change detection on a destroyed view. |
| if (!this._componentDestroyed) { |
| // We need to trigger change detection manually, because |
| // `fromEvent` doesn't seem to do it at the proper time. |
| // This ensures that the label is reset when the |
| // user clicks outside. |
| this._changeDetectorRef.detectChanges(); |
| } |
| } |
| /** |
| * Updates the position of the autocomplete suggestion panel to ensure that it fits all options |
| * within the viewport. |
| */ |
| updatePosition() { |
| if (this._overlayAttached) { |
| this._overlayRef.updatePosition(); |
| } |
| } |
| /** |
| * A stream of actions that should close the autocomplete panel, including |
| * when an option is selected, on blur, and when TAB is pressed. |
| */ |
| get panelClosingActions() { |
| return merge(this.optionSelections, this.autocomplete._keyManager.tabOut.pipe(filter(() => this._overlayAttached)), this._closeKeyEventStream, this._getOutsideClickStream(), this._overlayRef ? |
| this._overlayRef.detachments().pipe(filter(() => this._overlayAttached)) : |
| of()).pipe( |
| // Normalize the output so we return a consistent type. |
| map(event => event instanceof MatOptionSelectionChange ? event : null)); |
| } |
| /** The currently active option, coerced to MatOption type. */ |
| get activeOption() { |
| if (this.autocomplete && this.autocomplete._keyManager) { |
| return this.autocomplete._keyManager.activeItem; |
| } |
| return null; |
| } |
| /** Stream of clicks outside of the autocomplete panel. */ |
| _getOutsideClickStream() { |
| return merge(fromEvent(this._document, 'click'), fromEvent(this._document, 'auxclick'), fromEvent(this._document, 'touchend')) |
| .pipe(filter(event => { |
| // If we're in the Shadow DOM, the event target will be the shadow root, so we have to |
| // fall back to check the first element in the path of the click event. |
| const clickTarget = (this._isInsideShadowRoot && event.composedPath ? event.composedPath()[0] : |
| event.target); |
| const formField = this._formField ? this._formField._elementRef.nativeElement : null; |
| const customOrigin = this.connectedTo ? this.connectedTo.elementRef.nativeElement : null; |
| return this._overlayAttached && clickTarget !== this._element.nativeElement && |
| (!formField || !formField.contains(clickTarget)) && |
| (!customOrigin || !customOrigin.contains(clickTarget)) && |
| (!!this._overlayRef && !this._overlayRef.overlayElement.contains(clickTarget)); |
| })); |
| } |
| // Implemented as part of ControlValueAccessor. |
| writeValue(value) { |
| Promise.resolve(null).then(() => this._setTriggerValue(value)); |
| } |
| // Implemented as part of ControlValueAccessor. |
| registerOnChange(fn) { |
| this._onChange = fn; |
| } |
| // Implemented as part of ControlValueAccessor. |
| registerOnTouched(fn) { |
| this._onTouched = fn; |
| } |
| // Implemented as part of ControlValueAccessor. |
| setDisabledState(isDisabled) { |
| this._element.nativeElement.disabled = isDisabled; |
| } |
| _handleKeydown(event) { |
| const keyCode = event.keyCode; |
| // Prevent the default action on all escape key presses. This is here primarily to bring IE |
| // in line with other browsers. By default, pressing escape on IE will cause it to revert |
| // the input value to the one that it had on focus, however it won't dispatch any events |
| // which means that the model value will be out of sync with the view. |
| if (keyCode === ESCAPE && !hasModifierKey(event)) { |
| event.preventDefault(); |
| } |
| if (this.activeOption && keyCode === ENTER && this.panelOpen) { |
| this.activeOption._selectViaInteraction(); |
| this._resetActiveItem(); |
| event.preventDefault(); |
| } |
| else if (this.autocomplete) { |
| const prevActiveItem = this.autocomplete._keyManager.activeItem; |
| const isArrowKey = keyCode === UP_ARROW || keyCode === DOWN_ARROW; |
| if (this.panelOpen || keyCode === TAB) { |
| this.autocomplete._keyManager.onKeydown(event); |
| } |
| else if (isArrowKey && this._canOpen()) { |
| this.openPanel(); |
| } |
| if (isArrowKey || this.autocomplete._keyManager.activeItem !== prevActiveItem) { |
| this._scrollToOption(this.autocomplete._keyManager.activeItemIndex || 0); |
| } |
| } |
| } |
| _handleInput(event) { |
| let target = event.target; |
| let value = target.value; |
| // Based on `NumberValueAccessor` from forms. |
| if (target.type === 'number') { |
| value = value == '' ? null : parseFloat(value); |
| } |
| // If the input has a placeholder, IE will fire the `input` event on page load, |
| // focus and blur, in addition to when the user actually changed the value. To |
| // filter out all of the extra events, we save the value on focus and between |
| // `input` events, and we check whether it changed. |
| // See: https://connect.microsoft.com/IE/feedback/details/885747/ |
| if (this._previousValue !== value) { |
| this._previousValue = value; |
| this._onChange(value); |
| if (this._canOpen() && this._document.activeElement === event.target) { |
| this.openPanel(); |
| } |
| } |
| } |
| _handleFocus() { |
| if (!this._canOpenOnNextFocus) { |
| this._canOpenOnNextFocus = true; |
| } |
| else if (this._canOpen()) { |
| this._previousValue = this._element.nativeElement.value; |
| this._attachOverlay(); |
| this._floatLabel(true); |
| } |
| } |
| /** |
| * In "auto" mode, the label will animate down as soon as focus is lost. |
| * This causes the value to jump when selecting an option with the mouse. |
| * This method manually floats the label until the panel can be closed. |
| * @param shouldAnimate Whether the label should be animated when it is floated. |
| */ |
| _floatLabel(shouldAnimate = false) { |
| if (this._formField && this._formField.floatLabel === 'auto') { |
| if (shouldAnimate) { |
| this._formField._animateAndLockLabel(); |
| } |
| else { |
| this._formField.floatLabel = 'always'; |
| } |
| this._manuallyFloatingLabel = true; |
| } |
| } |
| /** If the label has been manually elevated, return it to its normal state. */ |
| _resetLabel() { |
| if (this._manuallyFloatingLabel) { |
| this._formField.floatLabel = 'auto'; |
| this._manuallyFloatingLabel = false; |
| } |
| } |
| /** |
| * This method listens to a stream of panel closing actions and resets the |
| * stream every time the option list changes. |
| */ |
| _subscribeToClosingActions() { |
| const firstStable = this._zone.onStable.pipe(take(1)); |
| const optionChanges = this.autocomplete.options.changes.pipe(tap(() => this._positionStrategy.reapplyLastPosition()), |
| // Defer emitting to the stream until the next tick, because changing |
| // bindings in here will cause "changed after checked" errors. |
| delay(0)); |
| // When the zone is stable initially, and when the option list changes... |
| return merge(firstStable, optionChanges) |
| .pipe( |
| // create a new stream of panelClosingActions, replacing any previous streams |
| // that were created, and flatten it so our stream only emits closing events... |
| switchMap(() => { |
| const wasOpen = this.panelOpen; |
| this._resetActiveItem(); |
| this.autocomplete._setVisibility(); |
| if (this.panelOpen) { |
| this._overlayRef.updatePosition(); |
| // If the `panelOpen` state changed, we need to make sure to emit the `opened` |
| // event, because we may not have emitted it when the panel was attached. This |
| // can happen if the users opens the panel and there are no options, but the |
| // options come in slightly later or as a result of the value changing. |
| if (wasOpen !== this.panelOpen) { |
| this.autocomplete.opened.emit(); |
| } |
| } |
| return this.panelClosingActions; |
| }), |
| // when the first closing event occurs... |
| take(1)) |
| // set the value, close the panel, and complete. |
| .subscribe(event => this._setValueAndClose(event)); |
| } |
| /** Destroys the autocomplete suggestion panel. */ |
| _destroyPanel() { |
| if (this._overlayRef) { |
| this.closePanel(); |
| this._overlayRef.dispose(); |
| this._overlayRef = null; |
| } |
| } |
| _setTriggerValue(value) { |
| const toDisplay = this.autocomplete && this.autocomplete.displayWith ? |
| this.autocomplete.displayWith(value) : |
| value; |
| // Simply falling back to an empty string if the display value is falsy does not work properly. |
| // The display value can also be the number zero and shouldn't fall back to an empty string. |
| const inputValue = toDisplay != null ? toDisplay : ''; |
| // If it's used within a `MatFormField`, we should set it through the property so it can go |
| // through change detection. |
| if (this._formField) { |
| this._formField._control.value = inputValue; |
| } |
| else { |
| this._element.nativeElement.value = inputValue; |
| } |
| this._previousValue = inputValue; |
| } |
| /** |
| * This method closes the panel, and if a value is specified, also sets the associated |
| * control to that value. It will also mark the control as dirty if this interaction |
| * stemmed from the user. |
| */ |
| _setValueAndClose(event) { |
| if (event && event.source) { |
| this._clearPreviousSelectedOption(event.source); |
| this._setTriggerValue(event.source.value); |
| this._onChange(event.source.value); |
| this._element.nativeElement.focus(); |
| this.autocomplete._emitSelectEvent(event.source); |
| } |
| this.closePanel(); |
| } |
| /** |
| * Clear any previous selected option and emit a selection change event for this option |
| */ |
| _clearPreviousSelectedOption(skip) { |
| this.autocomplete.options.forEach(option => { |
| if (option !== skip && option.selected) { |
| option.deselect(); |
| } |
| }); |
| } |
| _attachOverlay() { |
| var _a; |
| if (!this.autocomplete && (typeof ngDevMode === 'undefined' || ngDevMode)) { |
| throw getMatAutocompleteMissingPanelError(); |
| } |
| // We want to resolve this once, as late as possible so that we can be |
| // sure that the element has been moved into its final place in the DOM. |
| if (this._isInsideShadowRoot == null) { |
| this._isInsideShadowRoot = !!_getShadowRoot(this._element.nativeElement); |
| } |
| let overlayRef = this._overlayRef; |
| if (!overlayRef) { |
| this._portal = new TemplatePortal(this.autocomplete.template, this._viewContainerRef, { id: (_a = this._formField) === null || _a === void 0 ? void 0 : _a.getLabelId() }); |
| overlayRef = this._overlay.create(this._getOverlayConfig()); |
| this._overlayRef = overlayRef; |
| // Use the `keydownEvents` in order to take advantage of |
| // the overlay event targeting provided by the CDK overlay. |
| overlayRef.keydownEvents().subscribe(event => { |
| // Close when pressing ESCAPE or ALT + UP_ARROW, based on the a11y guidelines. |
| // See: https://www.w3.org/TR/wai-aria-practices-1.1/#textbox-keyboard-interaction |
| if ((event.keyCode === ESCAPE && !hasModifierKey(event)) || |
| (event.keyCode === UP_ARROW && hasModifierKey(event, 'altKey'))) { |
| this._resetActiveItem(); |
| this._closeKeyEventStream.next(); |
| // We need to stop propagation, otherwise the event will eventually |
| // reach the input itself and cause the overlay to be reopened. |
| event.stopPropagation(); |
| event.preventDefault(); |
| } |
| }); |
| this._viewportSubscription = this._viewportRuler.change().subscribe(() => { |
| if (this.panelOpen && overlayRef) { |
| overlayRef.updateSize({ width: this._getPanelWidth() }); |
| } |
| }); |
| } |
| else { |
| // Update the trigger, panel width and direction, in case anything has changed. |
| this._positionStrategy.setOrigin(this._getConnectedElement()); |
| overlayRef.updateSize({ width: this._getPanelWidth() }); |
| } |
| if (overlayRef && !overlayRef.hasAttached()) { |
| overlayRef.attach(this._portal); |
| this._closingActionsSubscription = this._subscribeToClosingActions(); |
| } |
| const wasOpen = this.panelOpen; |
| this.autocomplete._setVisibility(); |
| this.autocomplete._isOpen = this._overlayAttached = true; |
| // We need to do an extra `panelOpen` check in here, because the |
| // autocomplete won't be shown if there are no options. |
| if (this.panelOpen && wasOpen !== this.panelOpen) { |
| this.autocomplete.opened.emit(); |
| } |
| } |
| _getOverlayConfig() { |
| var _a; |
| return new OverlayConfig({ |
| positionStrategy: this._getOverlayPosition(), |
| scrollStrategy: this._scrollStrategy(), |
| width: this._getPanelWidth(), |
| direction: this._dir, |
| panelClass: (_a = this._defaults) === null || _a === void 0 ? void 0 : _a.overlayPanelClass, |
| }); |
| } |
| _getOverlayPosition() { |
| const strategy = this._overlay.position() |
| .flexibleConnectedTo(this._getConnectedElement()) |
| .withFlexibleDimensions(false) |
| .withPush(false); |
| this._setStrategyPositions(strategy); |
| this._positionStrategy = strategy; |
| return strategy; |
| } |
| /** Sets the positions on a position strategy based on the directive's input state. */ |
| _setStrategyPositions(positionStrategy) { |
| // Note that we provide horizontal fallback positions, even though by default the dropdown |
| // width matches the input, because consumers can override the width. See #18854. |
| const belowPositions = [ |
| { originX: 'start', originY: 'bottom', overlayX: 'start', overlayY: 'top' }, |
| { originX: 'end', originY: 'bottom', overlayX: 'end', overlayY: 'top' } |
| ]; |
| // The overlay edge connected to the trigger should have squared corners, while |
| // the opposite end has rounded corners. We apply a CSS class to swap the |
| // border-radius based on the overlay position. |
| const panelClass = this._aboveClass; |
| const abovePositions = [ |
| { originX: 'start', originY: 'top', overlayX: 'start', overlayY: 'bottom', panelClass }, |
| { originX: 'end', originY: 'top', overlayX: 'end', overlayY: 'bottom', panelClass } |
| ]; |
| let positions; |
| if (this.position === 'above') { |
| positions = abovePositions; |
| } |
| else if (this.position === 'below') { |
| positions = belowPositions; |
| } |
| else { |
| positions = [...belowPositions, ...abovePositions]; |
| } |
| positionStrategy.withPositions(positions); |
| } |
| _getConnectedElement() { |
| if (this.connectedTo) { |
| return this.connectedTo.elementRef; |
| } |
| return this._formField ? this._formField.getConnectedOverlayOrigin() : this._element; |
| } |
| _getPanelWidth() { |
| return this.autocomplete.panelWidth || this._getHostWidth(); |
| } |
| /** Returns the width of the input element, so the panel width can match it. */ |
| _getHostWidth() { |
| return this._getConnectedElement().nativeElement.getBoundingClientRect().width; |
| } |
| /** |
| * Resets the active item to -1 so arrow events will activate the |
| * correct options, or to 0 if the consumer opted into it. |
| */ |
| _resetActiveItem() { |
| const autocomplete = this.autocomplete; |
| if (autocomplete.autoActiveFirstOption) { |
| // Note that we go through `setFirstItemActive`, rather than `setActiveItem(0)`, because |
| // the former will find the next enabled option, if the first one is disabled. |
| autocomplete._keyManager.setFirstItemActive(); |
| } |
| else { |
| autocomplete._keyManager.setActiveItem(-1); |
| } |
| } |
| /** Determines whether the panel can be opened. */ |
| _canOpen() { |
| const element = this._element.nativeElement; |
| return !element.readOnly && !element.disabled && !this._autocompleteDisabled; |
| } |
| /** Use defaultView of injected document if available or fallback to global window reference */ |
| _getWindow() { |
| var _a; |
| return ((_a = this._document) === null || _a === void 0 ? void 0 : _a.defaultView) || window; |
| } |
| /** Scrolls to a particular option in the list. */ |
| _scrollToOption(index) { |
| // Given that we are not actually focusing active options, we must manually adjust scroll |
| // to reveal options below the fold. First, we find the offset of the option from the top |
| // of the panel. If that offset is below the fold, the new scrollTop will be the offset - |
| // the panel height + the option height, so the active option will be just visible at the |
| // bottom of the panel. If that offset is above the top of the visible panel, the new scrollTop |
| // will become the offset. If that offset is visible within the panel already, the scrollTop is |
| // not adjusted. |
| const autocomplete = this.autocomplete; |
| const labelCount = _countGroupLabelsBeforeOption(index, autocomplete.options, autocomplete.optionGroups); |
| if (index === 0 && labelCount === 1) { |
| // If we've got one group label before the option and we're at the top option, |
| // scroll the list to the top. This is better UX than scrolling the list to the |
| // top of the option, because it allows the user to read the top group's label. |
| autocomplete._setScrollTop(0); |
| } |
| else if (autocomplete.panel) { |
| const option = autocomplete.options.toArray()[index]; |
| if (option) { |
| const element = option._getHostElement(); |
| const newScrollPosition = _getOptionScrollPosition(element.offsetTop, element.offsetHeight, autocomplete._getScrollTop(), autocomplete.panel.nativeElement.offsetHeight); |
| autocomplete._setScrollTop(newScrollPosition); |
| } |
| } |
| } |
| } |
| _MatAutocompleteTriggerBase.decorators = [ |
| { type: Directive } |
| ]; |
| _MatAutocompleteTriggerBase.ctorParameters = () => [ |
| { type: ElementRef }, |
| { type: Overlay }, |
| { type: ViewContainerRef }, |
| { type: NgZone }, |
| { type: ChangeDetectorRef }, |
| { type: undefined, decorators: [{ type: Inject, args: [MAT_AUTOCOMPLETE_SCROLL_STRATEGY,] }] }, |
| { type: Directionality, decorators: [{ type: Optional }] }, |
| { type: MatFormField, decorators: [{ type: Optional }, { type: Inject, args: [MAT_FORM_FIELD,] }, { type: Host }] }, |
| { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [DOCUMENT,] }] }, |
| { type: ViewportRuler }, |
| { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_AUTOCOMPLETE_DEFAULT_OPTIONS,] }] } |
| ]; |
| _MatAutocompleteTriggerBase.propDecorators = { |
| autocomplete: [{ type: Input, args: ['matAutocomplete',] }], |
| position: [{ type: Input, args: ['matAutocompletePosition',] }], |
| connectedTo: [{ type: Input, args: ['matAutocompleteConnectedTo',] }], |
| autocompleteAttribute: [{ type: Input, args: ['autocomplete',] }], |
| autocompleteDisabled: [{ type: Input, args: ['matAutocompleteDisabled',] }] |
| }; |
| class MatAutocompleteTrigger extends _MatAutocompleteTriggerBase { |
| constructor() { |
| super(...arguments); |
| this._aboveClass = 'mat-autocomplete-panel-above'; |
| } |
| } |
| MatAutocompleteTrigger.decorators = [ |
| { type: Directive, args: [{ |
| selector: `input[matAutocomplete], textarea[matAutocomplete]`, |
| host: { |
| 'class': 'mat-autocomplete-trigger', |
| '[attr.autocomplete]': 'autocompleteAttribute', |
| '[attr.role]': 'autocompleteDisabled ? null : "combobox"', |
| '[attr.aria-autocomplete]': 'autocompleteDisabled ? null : "list"', |
| '[attr.aria-activedescendant]': '(panelOpen && activeOption) ? activeOption.id : null', |
| '[attr.aria-expanded]': 'autocompleteDisabled ? null : panelOpen.toString()', |
| '[attr.aria-owns]': '(autocompleteDisabled || !panelOpen) ? null : autocomplete?.id', |
| '[attr.aria-haspopup]': '!autocompleteDisabled', |
| // Note: we use `focusin`, as opposed to `focus`, in order to open the panel |
| // a little earlier. This avoids issues where IE delays the focusing of the input. |
| '(focusin)': '_handleFocus()', |
| '(blur)': '_onTouched()', |
| '(input)': '_handleInput($event)', |
| '(keydown)': '_handleKeydown($event)', |
| }, |
| exportAs: 'matAutocompleteTrigger', |
| providers: [MAT_AUTOCOMPLETE_VALUE_ACCESSOR] |
| },] } |
| ]; |
| |
| /** |
| * @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 MatAutocompleteModule { |
| } |
| MatAutocompleteModule.decorators = [ |
| { type: NgModule, args: [{ |
| imports: [ |
| OverlayModule, |
| MatOptionModule, |
| MatCommonModule, |
| CommonModule |
| ], |
| exports: [ |
| MatAutocomplete, |
| MatAutocompleteTrigger, |
| MatAutocompleteOrigin, |
| CdkScrollableModule, |
| MatOptionModule, |
| MatCommonModule, |
| ], |
| declarations: [MatAutocomplete, MatAutocompleteTrigger, MatAutocompleteOrigin], |
| providers: [MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER], |
| },] } |
| ]; |
| |
| /** |
| * @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 { AUTOCOMPLETE_OPTION_HEIGHT, AUTOCOMPLETE_PANEL_HEIGHT, MAT_AUTOCOMPLETE_DEFAULT_OPTIONS, MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY, MAT_AUTOCOMPLETE_SCROLL_STRATEGY, MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY, MAT_AUTOCOMPLETE_SCROLL_STRATEGY_FACTORY_PROVIDER, MAT_AUTOCOMPLETE_VALUE_ACCESSOR, MatAutocomplete, MatAutocompleteModule, MatAutocompleteOrigin, MatAutocompleteSelectedEvent, MatAutocompleteTrigger, _MatAutocompleteBase, _MatAutocompleteOriginBase, _MatAutocompleteTriggerBase, getMatAutocompleteMissingPanelError }; |
| //# sourceMappingURL=autocomplete.js.map |
