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AfterContentChecked,
AfterContentInit,
AfterViewInit,
Component,
ContentChild,
ContentChildren,
Directive,
ElementRef,
EventEmitter,
HostBinding,
Input,
NgZone,
OnChanges,
OnDestroy,
OnInit,
Output,
QueryList,
SimpleChanges,
ViewChild,
} from '@angular/core';
import { observeSizeOutsideAngular } from '../../utils/internal-utils';
import { Callback } from '../../utils/util.types';
let NEXT_AUTO_ID = 0;
// TODO rename directive attributes to add prefix
@Directive({
selector: 'label[data-gc-auto-id-label]',
standalone: false,
})
export class AutoIdLabelDirective {
constructor(public el: ElementRef<HTMLElement>) {}
}
@Directive({
selector: '[data-gc-auto-id-label]:not(label)',
standalone: false,
})
export class AutoIdGenericLabelDirective {
@Input('auto-id-label-active')
public active = true;
@Input('auto-id-label-order')
public order?: number; // note: dynamic updates not fully supported at the moment
constructor(public el: ElementRef<HTMLElement>) {}
}
@Directive({
selector: '[data-gc-auto-id-input]',
standalone: false,
})
export class AutoIdInputDirective {
@Input('data-gc-labeledbystrategy')
public labeledByStrategy?: 'label+self';
@HostBinding('attr.aria-invalid')
@Input('data-gc-error-state')
public errorState = false;
@HostBinding('attr.id')
public get id() {
return this.mainDirective.inputId;
}
@HostBinding('attr.aria-errormessage')
public get ariaErrorId() {
if (this.errorState) {
return this.mainDirective.errorId;
} else {
return undefined;
}
}
public get isLabelable(): boolean {
// https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#labelable
return [
'button',
'input',
'meter',
'output',
'progress',
'select',
'textarea',
].includes(this.el.nativeElement.tagName.toLowerCase());
}
constructor(
public el: ElementRef<HTMLElement>,
private mainDirective: AutoIdDirective,
) {}
}
@Directive({
selector: '[data-gc-auto-id-desc]',
standalone: false,
})
export class AutoIdDescDirective {
constructor(public el: ElementRef<HTMLElement>) {}
}
@Directive({
selector: '[data-gc-auto-id-sec-desc]',
standalone: false,
})
export class AutoIdSecondaryDescDirective {
constructor(public el: ElementRef<HTMLElement>) {}
}
@Directive({
selector: '[data-gc-auto-id-error]',
host: {
role: 'log',
'aria-live': 'assertive',
},
standalone: false,
})
export class AutoIdErrorDirective {
@HostBinding('attr.id')
public get id() {
return this.mainDirective.errorId;
}
constructor(private mainDirective: AutoIdDirective) {}
}
@Directive({
selector: '[auto-id]', // eslint-disable-line @angular-eslint/directive-selector -- old occurence, needs to be updated
exportAs: 'autoId',
standalone: false,
})
export class AutoIdDirective
implements OnInit, AfterContentInit, AfterContentChecked, OnChanges
{
@ContentChild(AutoIdLabelDirective) contentLabel?: AutoIdLabelDirective;
@ContentChildren(AutoIdGenericLabelDirective, { descendants: true })
contentLabelsGeneric!: QueryList<AutoIdGenericLabelDirective>;
@ContentChild(AutoIdInputDirective) contentInput?: AutoIdInputDirective;
@ContentChild(AutoIdDescDirective) contentDesc?: AutoIdDescDirective;
@ContentChild(AutoIdSecondaryDescDirective)
contentSecDesc?: AutoIdSecondaryDescDirective;
@Input('auto-id')
public id?: string;
autoId!: string;
labelId!: string;
inputId!: string;
descId!: string;
secDescId!: string;
errorId!: string;
private nextScopedId = 0;
constructor(public el: ElementRef) {}
ngOnChanges(changes: SimpleChanges): void {
if ('id' in changes && !changes.id.firstChange) {
this.initIds();
this.updateIds();
}
}
ngOnInit(): void {
this.initIds();
}
ngAfterContentInit(): void {
this.updateIds();
}
ngAfterContentChecked(): void {
this.updateIds();
}
// eslint-disable-next-line sonarjs/cognitive-complexity
updateIds(): void {
// NOSONAR ignoring cognitive complexity report
const labelEl = this.contentLabel?.el;
const inputEl = this.contentInput?.el;
const descEl = this.contentDesc?.el;
const secDescEl = this.contentSecDesc?.el;
for (const i of this.contentLabelsGeneric) {
if (!i.el.nativeElement.id) {
i.el.nativeElement.id =
this.labelId + '-' + (this.nextScopedId++).toString();
}
}
if (labelEl) {
labelEl.nativeElement.id = this.labelId;
}
if (inputEl && this.contentInput) {
let describedBy: string | undefined = undefined;
if (descEl && secDescEl) {
describedBy = this.descId + ' ' + this.secDescId;
} else if (descEl) {
describedBy = this.descId;
} else if (secDescEl) {
describedBy = this.secDescId;
}
if (describedBy !== undefined) {
inputEl.nativeElement.setAttribute('aria-describedby', describedBy);
} else {
inputEl.nativeElement.removeAttribute('aria-describedby');
}
}
if (
this.contentInput &&
inputEl &&
(labelEl !== undefined || this.contentLabelsGeneric.length > 0)
) {
if (labelEl && this.contentInput.isLabelable) {
labelEl.nativeElement.setAttribute('for', this.inputId);
}
const genericLabelIDs = this.contentLabelsGeneric
.filter(entry => entry.active)
.map((entry, index) => ({
id: entry.el.nativeElement.id,
order: entry.order ?? index,
}))
.sort((a, b) => a.order - b.order)
.map(entry => entry.id);
// we only connect with aria-labelledby if it is different to 'for'
if (this.contentInput.labeledByStrategy === 'label+self') {
inputEl.nativeElement.setAttribute(
'aria-labelledby',
[this.labelId, this.inputId].concat(genericLabelIDs).join(' '),
);
} else if (
!this.contentInput.isLabelable ||
this.contentLabelsGeneric.length > 0
) {
inputEl.nativeElement.setAttribute(
'aria-labelledby',
(labelEl ? [this.labelId] : []).concat(genericLabelIDs).join(' '),
);
}
}
if (descEl) {
descEl.nativeElement.id = this.descId;
}
if (secDescEl) {
secDescEl.nativeElement.id = this.secDescId;
}
}
private initIds() {
const id = this.id ?? 'widget-' + (NEXT_AUTO_ID++).toString();
this.autoId = id;
this.labelId = id + '-label';
this.descId = id + '-desc';
this.secDescId = id + '-sec-desc';
this.inputId = id + '-control';
this.errorId = id + '-error';
}
}
@Component({
selector: 'gc-label-container',
templateUrl: './label-container.component.html',
styleUrls: ['./label-container.component.css'],
standalone: false,
})
export class LabelContainerComponent implements AfterViewInit, OnDestroy {
/**
* manual required state
*/
@Input()
public required?: boolean;
/**
* manual readonly state
*/
@Input()
public readonly?: boolean;
/**
* manual disabled state
*/
@Input()
public disabled?: boolean;
/**
* manual active state
*/
@Input()
public active?: boolean;
/**
* Decides if the label container is resizable
*/
@Input() resizable?: boolean;
/** @ignore */
@ViewChild('drawerSlot', { static: true })
public drawerSlot!: ElementRef<HTMLElement>;
@Output()
public readonly boxClick: EventEmitter<MouseEvent> =
new EventEmitter<MouseEvent>();
/** @ignore */
@ViewChild('box', { static: true })
public boxEl!: ElementRef<HTMLDivElement>;
/** @ignore */
@ViewChild('lastCharacterPositionEl')
public lastCharacterPositionEl!: ElementRef<HTMLSpanElement>;
/** @ignore */
@ViewChild('topBorderStartEl')
public topBorderStartEl!: ElementRef<HTMLSpanElement>;
/** @ignore */
@ViewChild('label')
public labelEl!: ElementRef<HTMLDivElement>;
/** @ignore */
@ViewChild('fontLoadHelperEl')
public fontLoadHelperEl!: ElementRef<HTMLDivElement>;
/**
* manual error state
*/
@Input()
set error(value: boolean) {
this._error = value;
}
get error(): boolean {
return this._error;
}
/**
* manual focused state
*/
@Input()
public get focused() {
return this._focused;
}
public set focused(value: boolean | undefined) {
if (value === true && this._focused !== value) {
this.el.nativeElement.scrollIntoView({
block: 'nearest',
inline: 'nearest',
});
}
this._focused = value;
}
/** @ignore */
private _error = false;
/** @ignore */
private _focused?: boolean;
/** @ignore */
private resizeObserver?: Callback;
/** @ignore */
private labelPositionOffset = 0;
/** @ignore */
private labelLineHeight = 0;
/** @ignore */
private labelTopBorderLeftPos = 0;
constructor(
private readonly zone: NgZone,
private readonly el: ElementRef<HTMLElement>,
) {}
/** @ignore */
ngAfterViewInit(): void {
this.resizeObserver = observeSizeOutsideAngular(
this.zone,
[this.fontLoadHelperEl.nativeElement, this.labelEl.nativeElement],
this.computeLabelPositioning.bind(this),
);
}
/** @ignore */
ngOnDestroy(): void {
this.resizeObserver?.();
}
/** @ignore */
computeLabelPositioning(): undefined {
const style = getComputedStyle(this.labelEl.nativeElement);
const lineHeight = Number.parseFloat(style.lineHeight);
const labelVerticalOffset = Number.parseFloat(style.height) - lineHeight;
const lastCharacterOffsetLeft =
this.lastCharacterPositionEl.nativeElement.offsetLeft;
if (
this.labelPositionOffset !== labelVerticalOffset ||
this.labelLineHeight !== lineHeight ||
this.labelTopBorderLeftPos !== lastCharacterOffsetLeft
) {
this.labelPositionOffset = labelVerticalOffset;
this.labelLineHeight = lineHeight;
this.labelTopBorderLeftPos = lastCharacterOffsetLeft;
this.el.nativeElement.style.setProperty(
'--gc-label-position-offset',
`${this.labelPositionOffset.toFixed()}px`,
);
this.el.nativeElement.style.setProperty(
'--gc-label-line-height',
`${this.labelLineHeight.toFixed()}px`,
);
this.el.nativeElement.style.setProperty(
'--gc-label-top-border-left-pos',
`${this.labelTopBorderLeftPos.toFixed()}px`,
);
}
// We always return undefined as we don't want to execute
// something in the zone
return undefined;
}
/** @ignore */
public isActive(): boolean {
return !this.internal_disabled() && this.internal_active();
}
/** @ignore */
public isError(): boolean {
return !this.internal_disabled() && this.internal_error();
}
/** @ignore */
public isReadonly(): boolean {
return this.internal_readonly();
}
/** @ignore */
public isDisabled(): boolean {
return this.internal_disabled();
}
/** @ignore */
public isRequired(): boolean {
return this.internal_required();
}
/** @ignore */
public isFocused(): boolean {
return !this.internal_disabled() && this.internal_focused();
}
/** @ignore */
isResizable(): boolean {
return this.internal_resizable();
}
/** @ignore */
public internal_active(): boolean {
if (this.active != undefined) {
return this.active;
} else {
return false;
}
}
/** @ignore */
public internal_error(): boolean {
return this.error;
}
/** @ignore */
public internal_readonly(): boolean {
if (this.readonly != undefined) {
return this.readonly;
} else {
return false;
}
}
/** @ignore */
public internal_required(): boolean {
if (this.required != undefined) {
return this.required;
} else {
return false;
}
}
/** @ignore */
public internal_disabled(): boolean {
if (this.disabled != undefined) {
return this.disabled;
} else {
return false;
}
}
/** @ignore */
public internal_focused(): boolean {
if (this.focused != undefined) {
return this.focused;
} else {
return false;
}
}
/** @ignore */
internal_resizable(): boolean {
if (this.resizable != undefined) {
return this.resizable;
} else {
return false;
}
}
/** @ignore */
public onBoxClick(event: MouseEvent): void {
this.boxClick.emit(event);
}
}
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