@ux-aspects/ux-aspects
Version:
Open source user interface framework for building modern, responsive, mobile big data applications
105 lines • 13.5 kB
JavaScript
import { AutofillMonitor } from '@angular/cdk/text-field';
import { Directive, ElementRef, HostBinding, inject, Input, Renderer2 } from '@angular/core';
import { Subscription } from 'rxjs';
import * as i0 from "@angular/core";
export class FloatLabelDirective {
constructor() {
this._elementRef = inject(ElementRef);
this._renderer = inject(Renderer2);
this._autofillMonitor = inject(AutofillMonitor);
this.mode = 'focus';
this.raised = false;
this._focused = false;
this._eventHandles = [];
this._subscription = new Subscription();
}
set input(input) {
// remove any previous autofill subscriptions
if (this._input) {
this._autofillMonitor.stopMonitoring(this._input);
}
this._subscription.unsubscribe();
this._input = input;
// if the input is null then don't need to subscribe to autofillMonitor
if (!input) {
return;
}
// create a new autofillMonitor subscription
this._subscription = this._autofillMonitor.monitor(input).subscribe(event => {
if (!this.raised && event.isAutofilled) {
this.raised = true;
}
if (this.raised && !event.isAutofilled && !this.hasText()) {
this.raised = false;
}
});
}
get input() {
return this._input;
}
ngOnInit() {
this._eventHandles.push(this._renderer.listen(this.input, 'focus', this.inputFocus.bind(this)), this._renderer.listen(this.input, 'blur', this.inputBlur.bind(this)), this._renderer.listen(this.input, 'input', this.inputChange.bind(this)));
// Check initial input value
this.raised = this.hasText();
// Ensure that the `for` attribute is set
if (!this._elementRef.nativeElement.getAttribute('for') && this.input.getAttribute('id')) {
this._renderer.setAttribute(this._elementRef.nativeElement, 'for', this.input.getAttribute('id'));
}
}
ngOnChanges() {
if (!(this.mode === 'focus' && this._focused)) {
this.raised = this.hasText();
}
}
ngOnDestroy() {
// Unsubscribe event handles
this._eventHandles.forEach((eventHandle) => eventHandle());
this._autofillMonitor.stopMonitoring(this._input);
this._subscription.unsubscribe();
}
hasText() {
if (this.value === undefined) {
return !!this.input.value;
}
return !!this.value;
}
inputFocus() {
if (this.mode === 'focus') {
this._focused = true;
this.raised = true;
}
}
inputBlur() {
if (this.mode === 'focus') {
this._focused = false;
this.raised = this.hasText();
}
}
inputChange() {
if (this.mode === 'input') {
this.raised = this.hasText();
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.12", ngImport: i0, type: FloatLabelDirective, deps: [], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "14.0.0", version: "18.2.12", type: FloatLabelDirective, selector: "[uxFloatLabel]", inputs: { input: ["uxFloatLabel", "input"], value: "value", mode: "mode" }, host: { properties: { "class.ux-float-label-raised": "this.raised" }, classAttribute: "ux-float-label" }, usesOnChanges: true, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.12", ngImport: i0, type: FloatLabelDirective, decorators: [{
type: Directive,
args: [{
selector: '[uxFloatLabel]',
host: {
'class': 'ux-float-label'
}
}]
}], propDecorators: { input: [{
type: Input,
args: ['uxFloatLabel']
}], value: [{
type: Input
}], mode: [{
type: Input
}], raised: [{
type: HostBinding,
args: ['class.ux-float-label-raised']
}] } });
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{ AutofillMonitor } from '@angular/cdk/text-field';\nimport { Directive, ElementRef, HostBinding, inject, Input, OnChanges, OnDestroy, OnInit, Renderer2 } from '@angular/core';\nimport { Subscription } from 'rxjs';\n\n@Directive({\n    selector: '[uxFloatLabel]',\n    host: {\n        'class': 'ux-float-label'\n    }\n})\nexport class FloatLabelDirective<T = string> implements OnInit, OnChanges, OnDestroy {\n    private readonly _elementRef = inject(ElementRef);\n\n    private readonly _renderer = inject(Renderer2);\n\n    private readonly _autofillMonitor = inject(AutofillMonitor);\n\n    @Input('uxFloatLabel')\n    set input(input: HTMLInputElement) {\n\n        // remove any previous autofill subscriptions\n        if (this._input) {\n            this._autofillMonitor.stopMonitoring(this._input);\n        }\n\n        this._subscription.unsubscribe();\n\n        this._input = input;\n\n        // if the input is null then don't need to subscribe to autofillMonitor\n        if (!input) {\n            return;\n        }\n\n        // create a new autofillMonitor subscription\n        this._subscription = this._autofillMonitor.monitor(input).subscribe(event => {\n            if (!this.raised && event.isAutofilled) {\n                this.raised = true;\n            }\n            if (this.raised && !event.isAutofilled && !this.hasText()) {\n                this.raised = false;\n            }\n        });\n    }\n\n    get input(): HTMLInputElement {\n        return this._input;\n    }\n\n    @Input()\n    value: T;\n\n    @Input()\n    mode: 'focus' | 'input' = 'focus';\n\n    @HostBinding('class.ux-float-label-raised')\n    raised: boolean = false;\n\n\n    private _input: HTMLInputElement;\n    private _focused = false;\n     \n    private readonly _eventHandles: any[] = [];\n    private _subscription = new Subscription();\n\n    ngOnInit(): void {\n        this._eventHandles.push(\n            this._renderer.listen(this.input, 'focus', this.inputFocus.bind(this)),\n            this._renderer.listen(this.input, 'blur', this.inputBlur.bind(this)),\n            this._renderer.listen(this.input, 'input', this.inputChange.bind(this))\n        );\n\n        // Check initial input value\n        this.raised = this.hasText();\n\n        // Ensure that the `for` attribute is set\n        if (!this._elementRef.nativeElement.getAttribute('for') && this.input.getAttribute('id')) {\n            this._renderer.setAttribute(this._elementRef.nativeElement, 'for', this.input.getAttribute('id'));\n        }\n    }\n\n    ngOnChanges(): void {\n        if (!(this.mode === 'focus' && this._focused)) {\n            this.raised = this.hasText();\n        }\n    }\n\n    ngOnDestroy(): void {\n        // Unsubscribe event handles\n        this._eventHandles.forEach((eventHandle) => eventHandle());\n        this._autofillMonitor.stopMonitoring(this._input);\n        this._subscription.unsubscribe();\n    }\n\n    private hasText(): boolean {\n        if (this.value === undefined) {\n            return !!this.input.value;\n        }\n        return !!this.value;\n    }\n\n    private inputFocus(): void {\n        if (this.mode === 'focus') {\n            this._focused = true;\n            this.raised = true;\n        }\n    }\n\n    private inputBlur(): void {\n        if (this.mode === 'focus') {\n            this._focused = false;\n            this.raised = this.hasText();\n        }\n    }\n\n    private inputChange(): void {\n        if (this.mode === 'input') {\n            this.raised = this.hasText();\n        }\n    }\n}"]}