@ux-aspects/ux-aspects
Version:
Open source user interface framework for building modern, responsive, mobile big data applications
141 lines • 23.2 kB
JavaScript
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Directive, ElementRef, EventEmitter, inject, Input, NgZone, Output } from '@angular/core';
import { Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { AccessibilityOptionsService } from '../options/accessibility-options.service';
import { LocalFocusIndicatorOptions } from './focus-indicator-options/focus-indicator-options';
import { FocusIndicatorService } from './focus-indicator.service';
import * as i0 from "@angular/core";
export class FocusIndicatorDirective {
/** Specify whether or not we should mark this element as having focus if a child is focused */
set checkChildren(checkChildren) {
// allow a string to be used so we can skip checking a binding for performance benefits
checkChildren = coerceBooleanProperty(checkChildren);
if (checkChildren !== null && checkChildren !== undefined) {
this._checkChildren = checkChildren;
this.setOptions();
}
}
/** Indicate whether or not mouse events should cause the focus indicator to appear - will override any global setting */
set mouseFocusIndicator(mouseFocusIndicator) {
// allow a string to be used so we can skip checking a binding for performance benefits
mouseFocusIndicator = coerceBooleanProperty(mouseFocusIndicator);
if (mouseFocusIndicator !== null && mouseFocusIndicator !== undefined) {
this._options.set('mouseFocusIndicator', mouseFocusIndicator);
this.setOptions();
}
}
/** Indicate whether or not touch events should cause the focus indicator to appear - will override any global setting */
set touchFocusIndicator(touchFocusIndicator) {
// allow a string to be used so we can skip checking a binding for performance benefits
touchFocusIndicator = coerceBooleanProperty(touchFocusIndicator);
if (touchFocusIndicator !== null && touchFocusIndicator !== undefined) {
this._options.set('touchFocusIndicator', touchFocusIndicator);
this.setOptions();
}
}
/** Indicate whether or not keyboard events should cause the focus indicator to appear - will override any global setting */
set keyboardFocusIndicator(keyboardFocusIndicator) {
// allow a string to be used so we can skip checking a binding for performance benefits
keyboardFocusIndicator = coerceBooleanProperty(keyboardFocusIndicator);
if (keyboardFocusIndicator !== null && keyboardFocusIndicator !== undefined) {
this._options.set('keyboardFocusIndicator', keyboardFocusIndicator);
this.setOptions();
}
}
/** Indicate whether or not programmatic events should cause the focus indicator to appear - will override any global setting */
set programmaticFocusIndicator(programmaticFocusIndicator) {
// allow a string to be used so we can skip checking a binding for performance benefits
programmaticFocusIndicator = coerceBooleanProperty(programmaticFocusIndicator);
if (programmaticFocusIndicator !== null && programmaticFocusIndicator !== undefined) {
this._options.set('programmaticFocusIndicator', programmaticFocusIndicator);
this.setOptions();
}
}
constructor() {
this.optionsService = inject(AccessibilityOptionsService);
this._elementRef = inject(ElementRef);
this._focusIndicatorService = inject(FocusIndicatorService);
this._ngZone = inject(NgZone);
this.localOptions = inject(LocalFocusIndicatorOptions, { optional: true });
/** Emit the latest focus state */
this.indicator = new EventEmitter();
/** Store a private reference for the checkChildren option */
this._checkChildren = false;
/** Store all configuation options*/
this._options = new Map();
/** Unsubscribe on component destroy */
this._onDestroy = new Subject();
// set the inital option values based on global options
for (const option in (this.optionsService.options || {})) {
this._options.set(option, this.optionsService.options[option]);
}
// set the inital option values based on local options (if there are any)
for (const option in (this.localOptions || {})) {
this._options.set(option, this.localOptions[option]);
}
}
/** Setup the focus monitoring */
ngOnInit() {
// start the focus monitoring
this._focusIndicator = this._focusIndicatorService.monitor(this._elementRef.nativeElement, {
checkChildren: this._checkChildren,
mouseFocusIndicator: this._options.get('mouseFocusIndicator'),
touchFocusIndicator: this._options.get('touchFocusIndicator'),
keyboardFocusIndicator: this._options.get('keyboardFocusIndicator'),
programmaticFocusIndicator: this._options.get('programmaticFocusIndicator')
});
// subscribe to the focus state to emit an event on change
this._focusIndicator.isFocused$.pipe(takeUntil(this._onDestroy)).subscribe(isFocused => {
// emit the latest value
this._ngZone.run(() => this.indicator.emit(isFocused));
});
}
/** Tear down the directive */
ngOnDestroy() {
if (this._focusIndicator) {
this._focusIndicator.destroy();
}
// unsubscribe from all observables
this._onDestroy.next();
this._onDestroy.complete();
}
/** Focus this element with a specific origin */
focus(origin, options) {
this._focusIndicator.focus(origin, options);
}
/** Update the focus indicator with the latest options */
setOptions() {
if (this._focusIndicator) {
this._focusIndicator.setOptions({
checkChildren: this._checkChildren,
mouseFocusIndicator: this._options.get('mouseFocusIndicator'),
touchFocusIndicator: this._options.get('touchFocusIndicator'),
keyboardFocusIndicator: this._options.get('keyboardFocusIndicator'),
programmaticFocusIndicator: this._options.get('programmaticFocusIndicator')
});
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.12", ngImport: i0, type: FocusIndicatorDirective, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.2.12", type: FocusIndicatorDirective, selector: "[uxFocusIndicator]", inputs: { checkChildren: "checkChildren", mouseFocusIndicator: "mouseFocusIndicator", touchFocusIndicator: "touchFocusIndicator", keyboardFocusIndicator: "keyboardFocusIndicator", programmaticFocusIndicator: "programmaticFocusIndicator" }, outputs: { indicator: "indicator" }, exportAs: ["ux-focus-indicator"], ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.12", ngImport: i0, type: FocusIndicatorDirective, decorators: [{
type: Directive,
args: [{
selector: '[uxFocusIndicator]',
exportAs: 'ux-focus-indicator',
}]
}], ctorParameters: () => [], propDecorators: { checkChildren: [{
type: Input
}], mouseFocusIndicator: [{
type: Input
}], touchFocusIndicator: [{
type: Input
}], keyboardFocusIndicator: [{
type: Input
}], programmaticFocusIndicator: [{
type: Input
}], indicator: [{
type: Output
}] } });
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{ FocusOrigin } from '@angular/cdk/a11y';\nimport { coerceBooleanProperty } from '@angular/cdk/coercion';\nimport { Directive, ElementRef, EventEmitter, inject, Input, NgZone, OnDestroy, OnInit, Output } from '@angular/core';\nimport { Subject } from 'rxjs';\nimport { takeUntil } from 'rxjs/operators';\nimport { AccessibilityOptionsService } from '../options/accessibility-options.service';\nimport { FocusIndicator } from './focus-indicator';\nimport { LocalFocusIndicatorOptions } from './focus-indicator-options/focus-indicator-options';\nimport { FocusIndicatorService } from './focus-indicator.service';\n\n@Directive({\n    selector: '[uxFocusIndicator]',\n    exportAs: 'ux-focus-indicator',\n})\nexport class FocusIndicatorDirective implements OnInit, OnDestroy {\n    readonly optionsService = inject(AccessibilityOptionsService);\n\n    private readonly _elementRef = inject(ElementRef);\n\n    private readonly _focusIndicatorService = inject(FocusIndicatorService);\n\n    private readonly _ngZone = inject(NgZone);\n\n    readonly localOptions = inject(LocalFocusIndicatorOptions, { optional: true });\n\n    /** Specify whether or not we should mark this element as having focus if a child is focused */\n    @Input() set checkChildren(checkChildren: boolean | string) {\n\n        // allow a string to be used so we can skip checking a binding for performance benefits\n        checkChildren = coerceBooleanProperty(checkChildren);\n\n        if (checkChildren !== null && checkChildren !== undefined) {\n            this._checkChildren = checkChildren;\n            this.setOptions();\n        }\n    }\n\n    /** Indicate whether or not mouse events should cause the focus indicator to appear - will override any global setting */\n    @Input() set mouseFocusIndicator(mouseFocusIndicator: boolean | string) {\n\n        // allow a string to be used so we can skip checking a binding for performance benefits\n        mouseFocusIndicator = coerceBooleanProperty(mouseFocusIndicator);\n\n        if (mouseFocusIndicator !== null && mouseFocusIndicator !== undefined) {\n            this._options.set('mouseFocusIndicator', mouseFocusIndicator);\n            this.setOptions();\n        }\n    }\n\n    /** Indicate whether or not touch events should cause the focus indicator to appear - will override any global setting */\n    @Input() set touchFocusIndicator(touchFocusIndicator: boolean | string) {\n\n        // allow a string to be used so we can skip checking a binding for performance benefits\n        touchFocusIndicator = coerceBooleanProperty(touchFocusIndicator);\n\n        if (touchFocusIndicator !== null && touchFocusIndicator !== undefined) {\n            this._options.set('touchFocusIndicator', touchFocusIndicator);\n            this.setOptions();\n        }\n    }\n\n    /** Indicate whether or not keyboard events should cause the focus indicator to appear - will override any global setting */\n    @Input() set keyboardFocusIndicator(keyboardFocusIndicator: boolean | string) {\n\n        // allow a string to be used so we can skip checking a binding for performance benefits\n        keyboardFocusIndicator = coerceBooleanProperty(keyboardFocusIndicator);\n\n        if (keyboardFocusIndicator !== null && keyboardFocusIndicator !== undefined) {\n            this._options.set('keyboardFocusIndicator', keyboardFocusIndicator);\n            this.setOptions();\n        }\n    }\n\n    /** Indicate whether or not programmatic events should cause the focus indicator to appear - will override any global setting */\n    @Input() set programmaticFocusIndicator(programmaticFocusIndicator: boolean | string) {\n\n        // allow a string to be used so we can skip checking a binding for performance benefits\n        programmaticFocusIndicator = coerceBooleanProperty(programmaticFocusIndicator);\n\n        if (programmaticFocusIndicator !== null && programmaticFocusIndicator !== undefined) {\n            this._options.set('programmaticFocusIndicator', programmaticFocusIndicator);\n            this.setOptions();\n        }\n    }\n\n    /** Emit the latest focus state */\n    @Output() indicator = new EventEmitter<boolean>();\n\n    /** Store a private reference for the checkChildren option */\n    private _checkChildren: boolean = false;\n\n    /** Store all configuation options*/\n    private readonly _options = new Map<string, boolean>();\n\n    /** Store a reference to the focus handler */\n    private _focusIndicator: FocusIndicator;\n\n    /** Unsubscribe on component destroy */\n    private readonly _onDestroy = new Subject<void>();\n\n    constructor() {\n\n        // set the inital option values based on global options\n        for (const option in (this.optionsService.options || {})) {\n            this._options.set(option, this.optionsService.options[option]);\n        }\n\n        // set the inital option values based on local options (if there are any)\n        for (const option in (this.localOptions || {})) {\n            this._options.set(option, this.localOptions[option]);\n        }\n    }\n\n    /** Setup the focus monitoring */\n    ngOnInit(): void {\n\n        // start the focus monitoring\n        this._focusIndicator = this._focusIndicatorService.monitor(this._elementRef.nativeElement, {\n            checkChildren: this._checkChildren,\n            mouseFocusIndicator: this._options.get('mouseFocusIndicator'),\n            touchFocusIndicator: this._options.get('touchFocusIndicator'),\n            keyboardFocusIndicator: this._options.get('keyboardFocusIndicator'),\n            programmaticFocusIndicator: this._options.get('programmaticFocusIndicator')\n        });\n\n        // subscribe to the focus state to emit an event on change\n        this._focusIndicator.isFocused$.pipe(takeUntil(this._onDestroy)).subscribe(isFocused => {\n            // emit the latest value\n            this._ngZone.run(() => this.indicator.emit(isFocused));\n        });\n    }\n\n    /** Tear down the directive */\n    ngOnDestroy(): void {\n        if (this._focusIndicator) {\n            this._focusIndicator.destroy();\n        }\n\n        // unsubscribe from all observables\n        this._onDestroy.next();\n        this._onDestroy.complete();\n    }\n\n    /** Focus this element with a specific origin */\n    focus(origin?: FocusOrigin, options?: { preventScroll: boolean }): void {\n        this._focusIndicator.focus(origin, options);\n    }\n\n    /** Update the focus indicator with the latest options */\n    private setOptions(): void {\n        if (this._focusIndicator) {\n            this._focusIndicator.setOptions({\n                checkChildren: this._checkChildren,\n                mouseFocusIndicator: this._options.get('mouseFocusIndicator'),\n                touchFocusIndicator: this._options.get('touchFocusIndicator'),\n                keyboardFocusIndicator: this._options.get('keyboardFocusIndicator'),\n                programmaticFocusIndicator: this._options.get('programmaticFocusIndicator')\n            });\n        }\n    }\n}"]}