@angular/material
Version:
Angular Material
171 lines • 25.7 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { ActiveDescendantKeyManager } from '@angular/cdk/a11y';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { ChangeDetectionStrategy, ChangeDetectorRef, Component, ContentChildren, ElementRef, EventEmitter, Inject, InjectionToken, Input, Output, QueryList, TemplateRef, ViewChild, ViewEncapsulation, } from '@angular/core';
import { MAT_OPTION_PARENT_COMPONENT, MatOptgroup, MatOption, mixinDisableRipple, } from '@angular/material/core';
import { Subscription } from 'rxjs';
/**
* 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. */
export 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`. */
export const MAT_AUTOCOMPLETE_DEFAULT_OPTIONS = new InjectionToken('mat-autocomplete-default-options', {
providedIn: 'root',
factory: MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY,
});
/** @docs-private */
export function MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY() {
return { autoActiveFirstOption: false };
}
export class MatAutocomplete extends _MatAutocompleteMixinBase {
constructor(_changeDetectorRef, _elementRef, defaults) {
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++}`;
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 = value.split(' ').reduce((classList, className) => {
classList[className.trim()] = 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);
}
/** Sets the autocomplete visibility classes on a classlist based on the panel is visible. */
_setVisibilityClasses(classList) {
classList['mat-autocomplete-visible'] = this.showPanel;
classList['mat-autocomplete-hidden'] = !this.showPanel;
}
}
MatAutocomplete.decorators = [
{ type: Component, args: [{
selector: 'mat-autocomplete',
template: "<ng-template>\n <div class=\"mat-autocomplete-panel\" role=\"listbox\" [id]=\"id\" [ngClass]=\"_classList\" #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}\n"]
},] }
];
MatAutocomplete.ctorParameters = () => [
{ type: ChangeDetectorRef },
{ type: ElementRef },
{ type: undefined, decorators: [{ type: Inject, args: [MAT_AUTOCOMPLETE_DEFAULT_OPTIONS,] }] }
];
MatAutocomplete.propDecorators = {
template: [{ type: ViewChild, args: [TemplateRef, { static: true },] }],
panel: [{ type: ViewChild, args: ['panel',] }],
options: [{ type: ContentChildren, args: [MatOption, { descendants: true },] }],
optionGroups: [{ type: ContentChildren, args: [MatOptgroup, { descendants: true },] }],
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',] }]
};
//# 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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {ActiveDescendantKeyManager} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  AfterContentInit,\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  ContentChildren,\n  ElementRef,\n  EventEmitter,\n  Inject,\n  InjectionToken,\n  Input,\n  Output,\n  QueryList,\n  TemplateRef,\n  ViewChild,\n  ViewEncapsulation,\n  OnDestroy,\n} from '@angular/core';\nimport {\n  CanDisableRipple,\n  CanDisableRippleCtor,\n  MAT_OPTION_PARENT_COMPONENT,\n  MatOptgroup,\n  MatOption,\n  mixinDisableRipple,\n} from '@angular/material/core';\nimport {Subscription} from 'rxjs';\n\n\n/**\n * Autocomplete IDs need to be unique across components, so this counter exists outside of\n * the component definition.\n */\nlet _uniqueAutocompleteIdCounter = 0;\n\n/** Event object that is emitted when an autocomplete option is selected. */\nexport class MatAutocompleteSelectedEvent {\n  constructor(\n    /** Reference to the autocomplete panel that emitted the event. */\n    public source: MatAutocomplete,\n    /** Option that was selected. */\n    public option: MatOption) { }\n}\n\n/** Event object that is emitted when an autocomplete option is activated. */\nexport interface MatAutocompleteActivatedEvent {\n  /** Reference to the autocomplete panel that emitted the event. */\n  source: MatAutocomplete;\n\n  /** Option that was selected. */\n  option: MatOption|null;\n}\n\n// Boilerplate for applying mixins to MatAutocomplete.\n/** @docs-private */\nclass MatAutocompleteBase {}\nconst _MatAutocompleteMixinBase: CanDisableRippleCtor & typeof MatAutocompleteBase =\n    mixinDisableRipple(MatAutocompleteBase);\n\n/** Default `mat-autocomplete` options that can be overridden. */\nexport interface MatAutocompleteDefaultOptions {\n  /** Whether the first option should be highlighted when an autocomplete panel is opened. */\n  autoActiveFirstOption?: boolean;\n}\n\n/** Injection token to be used to override the default options for `mat-autocomplete`. */\nexport const MAT_AUTOCOMPLETE_DEFAULT_OPTIONS =\n    new InjectionToken<MatAutocompleteDefaultOptions>('mat-autocomplete-default-options', {\n      providedIn: 'root',\n      factory: MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY,\n    });\n\n/** @docs-private */\nexport function MAT_AUTOCOMPLETE_DEFAULT_OPTIONS_FACTORY(): MatAutocompleteDefaultOptions {\n  return {autoActiveFirstOption: false};\n}\n\n@Component({\n  selector: 'mat-autocomplete',\n  templateUrl: 'autocomplete.html',\n  styleUrls: ['autocomplete.css'],\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  exportAs: 'matAutocomplete',\n  inputs: ['disableRipple'],\n  host: {\n    'class': 'mat-autocomplete'\n  },\n  providers: [\n    {provide: MAT_OPTION_PARENT_COMPONENT, useExisting: MatAutocomplete}\n  ]\n})\nexport class MatAutocomplete extends _MatAutocompleteMixinBase implements AfterContentInit,\n  CanDisableRipple, OnDestroy {\n    private _activeOptionChanges = Subscription.EMPTY;\n\n  /** Manages active item in option list based on key events. */\n  _keyManager: ActiveDescendantKeyManager<MatOption>;\n\n  /** Whether the autocomplete panel should be visible, depending on option length. */\n  showPanel: boolean = false;\n\n  /** Whether the autocomplete panel is open. */\n  get isOpen(): boolean { return this._isOpen && this.showPanel; }\n  _isOpen: boolean = false;\n\n  // The @ViewChild query for TemplateRef here needs to be static because some code paths\n  // lead to the overlay being created before change detection has finished for this component.\n  // Notably, another component may trigger `focus` on the autocomplete-trigger.\n\n  /** @docs-private */\n  @ViewChild(TemplateRef, {static: true}) template: TemplateRef<any>;\n\n  /** Element for the panel containing the autocomplete options. */\n  @ViewChild('panel') panel: ElementRef;\n\n  /** @docs-private */\n  @ContentChildren(MatOption, {descendants: true}) options: QueryList<MatOption>;\n\n  /** @docs-private */\n  @ContentChildren(MatOptgroup, {descendants: true}) optionGroups: QueryList<MatOptgroup>;\n\n  /** Function that maps an option's control value to its display value in the trigger. */\n  @Input() displayWith: ((value: any) => string) | null = null;\n\n  /**\n   * Whether the first option should be highlighted when the autocomplete panel is opened.\n   * Can be configured globally through the `MAT_AUTOCOMPLETE_DEFAULT_OPTIONS` token.\n   */\n  @Input()\n  get autoActiveFirstOption(): boolean { return this._autoActiveFirstOption; }\n  set autoActiveFirstOption(value: boolean) {\n    this._autoActiveFirstOption = coerceBooleanProperty(value);\n  }\n  private _autoActiveFirstOption: boolean;\n\n  /**\n   * Specify the width of the autocomplete panel.  Can be any CSS sizing value, otherwise it will\n   * match the width of its host.\n   */\n  @Input() panelWidth: string | number;\n\n  /** Event that is emitted whenever an option from the list is selected. */\n  @Output() readonly optionSelected: EventEmitter<MatAutocompleteSelectedEvent> =\n      new EventEmitter<MatAutocompleteSelectedEvent>();\n\n  /** Event that is emitted when the autocomplete panel is opened. */\n  @Output() readonly opened: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Event that is emitted when the autocomplete panel is closed. */\n  @Output() readonly closed: EventEmitter<void> = new EventEmitter<void>();\n\n  /** Emits whenever an option is activated using the keyboard. */\n  @Output() readonly optionActivated: EventEmitter<MatAutocompleteActivatedEvent> =\n      new EventEmitter<MatAutocompleteActivatedEvent>();\n\n  /**\n   * Takes classes set on the host mat-autocomplete element and applies them to the panel\n   * inside the overlay container to allow for easy styling.\n   */\n  @Input('class')\n  set classList(value: string) {\n    if (value && value.length) {\n      this._classList = value.split(' ').reduce((classList, className) => {\n        classList[className.trim()] = true;\n        return classList;\n      }, {} as {[key: string]: boolean});\n    } else {\n      this._classList = {};\n    }\n\n    this._setVisibilityClasses(this._classList);\n    this._elementRef.nativeElement.className = '';\n  }\n  _classList: {[key: string]: boolean} = {};\n\n  /** Unique ID to be used by autocomplete trigger's \"aria-owns\" property. */\n  id: string = `mat-autocomplete-${_uniqueAutocompleteIdCounter++}`;\n\n  constructor(\n    private _changeDetectorRef: ChangeDetectorRef,\n    private _elementRef: ElementRef<HTMLElement>,\n    @Inject(MAT_AUTOCOMPLETE_DEFAULT_OPTIONS) defaults: MatAutocompleteDefaultOptions) {\n    super();\n\n    this._autoActiveFirstOption = !!defaults.autoActiveFirstOption;\n  }\n\n  ngAfterContentInit() {\n    this._keyManager = new ActiveDescendantKeyManager<MatOption>(this.options).withWrap();\n    this._activeOptionChanges = this._keyManager.change.subscribe(index => {\n      this.optionActivated.emit({source: this, option: this.options.toArray()[index] || null});\n    });\n\n    // Set the initial visibility state.\n    this._setVisibility();\n  }\n\n  ngOnDestroy() {\n    this._activeOptionChanges.unsubscribe();\n  }\n\n  /**\n   * Sets the panel scrollTop. This allows us to manually scroll to display options\n   * above or below the fold, as they are not actually being focused when active.\n   */\n  _setScrollTop(scrollTop: number): void {\n    if (this.panel) {\n      this.panel.nativeElement.scrollTop = scrollTop;\n    }\n  }\n\n  /** Returns the panel's scrollTop. */\n  _getScrollTop(): number {\n    return this.panel ? this.panel.nativeElement.scrollTop : 0;\n  }\n\n  /** Panel should hide itself when the option list is empty. */\n  _setVisibility() {\n    this.showPanel = !!this.options.length;\n    this._setVisibilityClasses(this._classList);\n    this._changeDetectorRef.markForCheck();\n  }\n\n  /** Emits the `select` event. */\n  _emitSelectEvent(option: MatOption): void {\n    const event = new MatAutocompleteSelectedEvent(this, option);\n    this.optionSelected.emit(event);\n  }\n\n  /** Sets the autocomplete visibility classes on a classlist based on the panel is visible. */\n  private _setVisibilityClasses(classList: {[key: string]: boolean}) {\n    classList['mat-autocomplete-visible'] = this.showPanel;\n    classList['mat-autocomplete-hidden'] = !this.showPanel;\n  }\n\n  static ngAcceptInputType_autoActiveFirstOption: BooleanInput;\n  static ngAcceptInputType_disableRipple: BooleanInput;\n}\n\n"]}