d9ae709b-3c27-4b69-b125-b8b80b54f90b

import {
    Component,
    TemplateRef,
    ViewChild,
    ChangeDetectionStrategy,
    ContentChildren,
    QueryList,
    OnInit,
    Output,
    EventEmitter,
    NgZone,
    OnDestroy,
    AfterContentInit,
    ChangeDetectorRef,
    Input,
    ElementRef
} from '@angular/core';
import { Constructor, InputBoolean, ThyUnsubscribe } from 'ngx-tethys/core';
import { defer, merge, Observable, timer } from 'rxjs';
import { take, switchMap, takeUntil, startWith } from 'rxjs/operators';
import { MixinBase, mixinUnsubscribe } from 'ngx-tethys/core';
import { SelectionModel } from '@angular/cdk/collections';
import {
    THY_OPTION_PARENT_COMPONENT,
    IThyOptionParentComponent,
    ThyOptionComponent,
    ThyOptionSelectionChangeEvent,
    ThyStopPropagationDirective
} from 'ngx-tethys/shared';
import { ActiveDescendantKeyManager } from '@angular/cdk/a11y';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { ThyEmptyComponent } from 'ngx-tethys/empty';
import { NgClass, NgIf } from '@angular/common';

/** Event object that is emitted when an autocomplete option is activated. */
export interface ThyAutocompleteActivatedEvent {
    /** Reference to the autocomplete panel that emitted the event. */
    source: ThyAutocompleteComponent;

    /** Option that was selected. */
    option: ThyOptionComponent | null;
}

const _MixinBase: Constructor<ThyUnsubscribe> & typeof MixinBase = mixinUnsubscribe(MixinBase);

/**
 * 自动完成组件
 * @name thy-autocomplete
 */
@Component({
    selector: 'thy-autocomplete',
    templateUrl: 'autocomplete.component.html',
    changeDetection: ChangeDetectionStrategy.OnPush,
    providers: [
        {
            provide: THY_OPTION_PARENT_COMPONENT,
            useExisting: ThyAutocompleteComponent
        }
    ],
    standalone: true,
    imports: [ThyStopPropagationDirective, NgClass, NgIf, ThyEmptyComponent]
})
export class ThyAutocompleteComponent extends _MixinBase implements IThyOptionParentComponent, OnInit, AfterContentInit, OnDestroy {
    dropDownClass: { [key: string]: boolean };

    isMultiple = false;

    mode = '';

    isEmptyOptions = false;

    selectionModel: SelectionModel<ThyOptionComponent>;

    isOpened = false;

    /** Manages active item in option list based on key events. */
    keyManager: ActiveDescendantKeyManager<ThyOptionComponent>;

    @ViewChild('contentTemplate', { static: true })
    contentTemplateRef: TemplateRef<any>;

    // scroll element container
    @ViewChild('panel')
    optionsContainer: ElementRef<any>;

    /**
     * @private
     */
    @ContentChildren(ThyOptionComponent, { descendants: true }) options: QueryList<ThyOptionComponent>;

    readonly optionSelectionChanges: Observable<ThyOptionSelectionChangeEvent> = defer(() => {
        if (this.options) {
            return merge(...this.options.map(option => option.selectionChange));
        }
        return this.ngZone.onStable.asObservable().pipe(
            take(1),
            switchMap(() => this.optionSelectionChanges)
        );
    }) as Observable<ThyOptionSelectionChangeEvent>;

    /**
     * 空选项时的文本
     * @type string
     */
    @Input()
    thyEmptyText = '没有任何数据';

    /**
     * 是否默认高亮第一个选项
     * @type boolean
     * @default false
     */
    @Input()
    @InputBoolean()
    set thyAutoActiveFirstOption(value: boolean) {
        this._autoActiveFirstOption = coerceBooleanProperty(value);
    }

    get thyAutoActiveFirstOption(): boolean {
        return this._autoActiveFirstOption;
    }
    private _autoActiveFirstOption: boolean;

    /**
     * 被选中时调用，参数包含选中项的 value 值
     * @type EventEmitter<ThyOptionSelectionChangeEvent>
     */
    @Output() thyOptionSelected: EventEmitter<ThyOptionSelectionChangeEvent> = new EventEmitter<ThyOptionSelectionChangeEvent>();

    /**
     * 只读，展开下拉菜单的回调
     * @type EventEmitter<void>
     */
    @Output() readonly thyOpened: EventEmitter<void> = new EventEmitter<void>();

    /**
     * 只读，关闭下拉菜单的回调
     * @type EventEmitter<void>
     */
    @Output() readonly thyClosed: EventEmitter<void> = new EventEmitter<void>();

    /** Emits whenever an option is activated using the keyboard. */
    /**
     * 只读，option 激活状态变化时，调用此函数
     * @type EventEmitter<ThyAutocompleteActivatedEvent>
     */
    @Output() readonly thyOptionActivated: EventEmitter<ThyAutocompleteActivatedEvent> = new EventEmitter<ThyAutocompleteActivatedEvent>();

    constructor(private ngZone: NgZone, private changeDetectorRef: ChangeDetectorRef) {
        super();
    }

    ngOnInit() {
        this.setDropDownClass();
        this.instanceSelectionModel();
    }

    ngAfterContentInit() {
        this.options.changes.pipe(startWith(null), takeUntil(this.ngUnsubscribe$)).subscribe(() => {
            this.resetOptions();
            timer(0).subscribe(() => {
                this.isEmptyOptions = this.options.length <= 0;
                this.changeDetectorRef.detectChanges();
            });
            this.initKeyManager();
        });
    }

    initKeyManager() {
        const changedOrDestroyed$ = merge(this.options.changes, this.ngUnsubscribe$);
        this.keyManager = new ActiveDescendantKeyManager<ThyOptionComponent>(this.options).withWrap();
        this.keyManager.change.pipe(takeUntil(changedOrDestroyed$)).subscribe(index => {
            this.thyOptionActivated.emit({ source: this, option: this.options.toArray()[index] || null });
        });
    }

    open() {
        this.isOpened = true;
        this.changeDetectorRef.markForCheck();
        this.thyOpened.emit();
    }

    close() {
        this.isOpened = false;
        this.thyClosed.emit();
    }

    private resetOptions() {
        const changedOrDestroyed$ = merge(this.options.changes, this.ngUnsubscribe$);

        this.optionSelectionChanges.pipe(takeUntil(changedOrDestroyed$)).subscribe((event: ThyOptionSelectionChangeEvent) => {
            this.onSelect(event.option, event.isUserInput);
        });
    }

    private instanceSelectionModel() {
        if (this.selectionModel) {
            this.selectionModel.clear();
        }
        this.selectionModel = new SelectionModel<ThyOptionComponent>(this.isMultiple);
        this.selectionModel.changed.pipe(takeUntil(this.ngUnsubscribe$)).subscribe(event => {
            event.added.forEach(option => option.select());
            event.removed.forEach(option => option.deselect());
        });
    }

    private onSelect(option: ThyOptionComponent, isUserInput: boolean) {
        const wasSelected = this.selectionModel.isSelected(option);

        if (option.thyValue == null && !this.isMultiple) {
            option.deselect();
            this.selectionModel.clear();
        } else {
            if (wasSelected !== option.selected) {
                option.selected ? this.selectionModel.select(option) : this.selectionModel.deselect(option);
            }

            if (isUserInput) {
                this.keyManager.setActiveItem(option);
            }

            // if (this.isMultiple) {
            //     this.sortValues();
            //     if (isUserInput) {
            //         this.focus();
            //     }
            // }
        }

        if (wasSelected !== this.selectionModel.isSelected(option)) {
            this.thyOptionSelected.emit(new ThyOptionSelectionChangeEvent(option, false));
        }
        this.changeDetectorRef.markForCheck();
    }

    private setDropDownClass() {
        let modeClass = '';
        if (this.isMultiple) {
            modeClass = `thy-select-dropdown-${this.mode}`;
        } else {
            modeClass = `thy-select-dropdown-single`;
        }
        this.dropDownClass = {
            [`thy-select-dropdown`]: true,
            [modeClass]: true
        };
    }

    ngOnDestroy() {
        super.ngOnDestroy();
    }
}

1	import {
2	Component,
3	TemplateRef,
4	ViewChild,
5	ChangeDetectionStrategy,
6	ContentChildren,
7	QueryList,
8	OnInit,
9	Output,
10	EventEmitter,
11	NgZone,
12	OnDestroy,
13	AfterContentInit,
14	ChangeDetectorRef,
15	Input,	1✔
16	ElementRef
17	} from '@angular/core';
18	import { Constructor, InputBoolean, ThyUnsubscribe } from 'ngx-tethys/core';
19	import { defer, merge, Observable, timer } from 'rxjs';
20	import { take, switchMap, takeUntil, startWith } from 'rxjs/operators';	1✔
21	import { MixinBase, mixinUnsubscribe } from 'ngx-tethys/core';
22	import { SelectionModel } from '@angular/cdk/collections';	×
23	import {
24	THY_OPTION_PARENT_COMPONENT,
25	IThyOptionParentComponent,	×
26	ThyOptionComponent,
27	ThyOptionSelectionChangeEvent,
28	ThyStopPropagationDirective	×
29	} from 'ngx-tethys/shared';	×
30	import { ActiveDescendantKeyManager } from '@angular/cdk/a11y';	×
31	import { coerceBooleanProperty } from '@angular/cdk/coercion';	×
32	import { ThyEmptyComponent } from 'ngx-tethys/empty';	×
33	import { NgClass, NgIf } from '@angular/common';	×
34		×
35	/** Event object that is emitted when an autocomplete option is activated. */	×
36	export interface ThyAutocompleteActivatedEvent {	×
37	/** Reference to the autocomplete panel that emitted the event. */	×
38	source: ThyAutocompleteComponent;
39		×
40	/** Option that was selected. */
41	option: ThyOptionComponent \| null;	×
42	}	×
43		×
44	const _MixinBase: Constructor<ThyUnsubscribe> & typeof MixinBase = mixinUnsubscribe(MixinBase);	×
45		×
46	/**
47	* 自动完成组件
48	* @name thy-autocomplete	×
49	*/	×
50	@Component({
51	selector: 'thy-autocomplete',
52	templateUrl: 'autocomplete.component.html',	×
53	changeDetection: ChangeDetectionStrategy.OnPush,	×
54	providers: [	×
55	{	×
56	provide: THY_OPTION_PARENT_COMPONENT,	×
57	useExisting: ThyAutocompleteComponent
58	}	×
59	],
60	standalone: true,
61	imports: [ThyStopPropagationDirective, NgClass, NgIf, ThyEmptyComponent]
62	})	×
63	export class ThyAutocompleteComponent extends _MixinBase implements IThyOptionParentComponent, OnInit, AfterContentInit, OnDestroy {	×
64	dropDownClass: { [key: string]: boolean };	×
65		×
66	isMultiple = false;
67
68	mode = '';
69		×
70	isEmptyOptions = false;	×
71		×
72	selectionModel: SelectionModel<ThyOptionComponent>;
73
74	isOpened = false;	×
75		×
76	/** Manages active item in option list based on key events. */
77	keyManager: ActiveDescendantKeyManager<ThyOptionComponent>;
78		×
79	@ViewChild('contentTemplate', { static: true })	×
80	contentTemplateRef: TemplateRef<any>;	×
81
82	// scroll element container
83	@ViewChild('panel')
84	optionsContainer: ElementRef<any>;	×
85		×
86	/**
87	* @private	×
88	*/	×
89	@ContentChildren(ThyOptionComponent, { descendants: true }) options: QueryList<ThyOptionComponent>;	×
90		×
91	readonly optionSelectionChanges: Observable<ThyOptionSelectionChangeEvent> = defer(() => {
92	if (this.options) {
93	return merge(...this.options.map(option => option.selectionChange));
94	}	×
95	return this.ngZone.onStable.asObservable().pipe(	×
96	take(1),	×
97	switchMap(() => this.optionSelectionChanges)	×
98	);
99	}) as Observable<ThyOptionSelectionChangeEvent>;
100		×
101	/**	×
102	* 空选项时的文本
103	* @type string	×
104	*/	×
105	@Input()
106	thyEmptyText = '没有任何数据';
107
108	/**
109	* 是否默认高亮第一个选项
110	* @type boolean
111	* @default false
112	*/
113	@Input()	×
114	@InputBoolean()	×
115	set thyAutoActiveFirstOption(value: boolean) {
116	this._autoActiveFirstOption = coerceBooleanProperty(value);	×
117	}
118
119	get thyAutoActiveFirstOption(): boolean {	×
120	return this._autoActiveFirstOption;	×
121	}	×
122	private _autoActiveFirstOption: boolean;
123
124	/**	×
125	* 被选中时调用，参数包含选中项的 value 值
126	* @type EventEmitter<ThyOptionSelectionChangeEvent>	×
127	*/
128	@Output() thyOptionSelected: EventEmitter<ThyOptionSelectionChangeEvent> = new EventEmitter<ThyOptionSelectionChangeEvent>();
129
130	/**
131	* 只读，展开下拉菜单的回调
132	* @type EventEmitter<void>	×
133	*/
134	@Output() readonly thyOpened: EventEmitter<void> = new EventEmitter<void>();	1✔
135
136	/**
137	* 只读，关闭下拉菜单的回调
138	* @type EventEmitter<void>	1✔
139	*/
140	@Output() readonly thyClosed: EventEmitter<void> = new EventEmitter<void>();
141
142	/** Emits whenever an option is activated using the keyboard. */
143	/**
144	* 只读，option 激活状态变化时，调用此函数
145	* @type EventEmitter<ThyAutocompleteActivatedEvent>
146	*/
147	@Output() readonly thyOptionActivated: EventEmitter<ThyAutocompleteActivatedEvent> = new EventEmitter<ThyAutocompleteActivatedEvent>();
148
149	constructor(private ngZone: NgZone, private changeDetectorRef: ChangeDetectorRef) {
150	super();	1✔
151	}
152
153	ngOnInit() {
154	this.setDropDownClass();
155	this.instanceSelectionModel();	1✔
156	}
157
158	ngAfterContentInit() {
159	this.options.changes.pipe(startWith(null), takeUntil(this.ngUnsubscribe$)).subscribe(() => {
160	this.resetOptions();
161	timer(0).subscribe(() => {
162	this.isEmptyOptions = this.options.length <= 0;
163	this.changeDetectorRef.detectChanges();
164	});
165	this.initKeyManager();
166	});
167	}
168
169	initKeyManager() {
170	const changedOrDestroyed$ = merge(this.options.changes, this.ngUnsubscribe$);
171	this.keyManager = new ActiveDescendantKeyManager<ThyOptionComponent>(this.options).withWrap();
172	this.keyManager.change.pipe(takeUntil(changedOrDestroyed$)).subscribe(index => {
173	this.thyOptionActivated.emit({ source: this, option: this.options.toArray()[index] \|\| null });
174	});
175	}
176
177	open() {
178	this.isOpened = true;
179	this.changeDetectorRef.markForCheck();
180	this.thyOpened.emit();
181	}
182
183	close() {
184	this.isOpened = false;
185	this.thyClosed.emit();
186	}
187
188	private resetOptions() {
189	const changedOrDestroyed$ = merge(this.options.changes, this.ngUnsubscribe$);
190
191	this.optionSelectionChanges.pipe(takeUntil(changedOrDestroyed$)).subscribe((event: ThyOptionSelectionChangeEvent) => {
192	this.onSelect(event.option, event.isUserInput);
193	});
194	}
195
196	private instanceSelectionModel() {
197	if (this.selectionModel) {
198	this.selectionModel.clear();
199	}
200	this.selectionModel = new SelectionModel<ThyOptionComponent>(this.isMultiple);
201	this.selectionModel.changed.pipe(takeUntil(this.ngUnsubscribe$)).subscribe(event => {
202	event.added.forEach(option => option.select());
203	event.removed.forEach(option => option.deselect());
204	});
205	}
206
207	private onSelect(option: ThyOptionComponent, isUserInput: boolean) {
208	const wasSelected = this.selectionModel.isSelected(option);
209
210	if (option.thyValue == null && !this.isMultiple) {
211	option.deselect();
212	this.selectionModel.clear();
213	} else {
214	if (wasSelected !== option.selected) {
215	option.selected ? this.selectionModel.select(option) : this.selectionModel.deselect(option);
216	}
217
218	if (isUserInput) {
219	this.keyManager.setActiveItem(option);
220	}
221
222	// if (this.isMultiple) {
223	// this.sortValues();
224	// if (isUserInput) {
225	// this.focus();
226	// }
227	// }
228	}
229
230	if (wasSelected !== this.selectionModel.isSelected(option)) {
231	this.thyOptionSelected.emit(new ThyOptionSelectionChangeEvent(option, false));
232	}
233	this.changeDetectorRef.markForCheck();
234	}
235
236	private setDropDownClass() {
237	let modeClass = '';
238	if (this.isMultiple) {
239	modeClass = `thy-select-dropdown-${this.mode}`;
240	} else {
241	modeClass = `thy-select-dropdown-single`;
242	}
243	this.dropDownClass = {
244	[`thy-select-dropdown`]: true,
245	[modeClass]: true
246	};
247	}
248
249	ngOnDestroy() {
250	super.ngOnDestroy();
251	}
252	}

atinc / ngx-tethys / d9ae709b-3c27-4b69-b125-b8b80b54f90b

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