@angular/material
Version:
Angular Material
73 lines • 14.8 kB
JavaScript
import { ChangeDetectionStrategy, Component, InjectionToken, Input, ViewEncapsulation, Directive, Inject, Optional } from '@angular/core';
import { mixinDisabled } from '../common-behaviors/disabled';
import { MAT_OPTION_PARENT_COMPONENT } from './option-parent';
import * as i0 from "@angular/core";
// Notes on the accessibility pattern used for `mat-optgroup`.
// The option group has two different "modes": regular and inert. The regular mode uses the
// recommended a11y pattern which has `role="group"` on the group element with `aria-labelledby`
// pointing to the label. This works for `mat-select`, but it seems to hit a bug for autocomplete
// under VoiceOver where the group doesn't get read out at all. The bug appears to be that if
// there's __any__ a11y-related attribute on the group (e.g. `role` or `aria-labelledby`),
// VoiceOver on Safari won't read it out.
// We've introduced the `inert` mode as a workaround. Under this mode, all a11y attributes are
// removed from the group, and we get the screen reader to read out the group label by mirroring it
// inside an invisible element in the option. This is sub-optimal, because the screen reader will
// repeat the group label on each navigation, whereas the default pattern only reads the group when
// the user enters a new group. The following alternate approaches were considered:
// 1. Reading out the group label using the `LiveAnnouncer` solves the problem, but we can't control
// when the text will be read out so sometimes it comes in too late or never if the user
// navigates quickly.
// 2. `<mat-option aria-describedby="groupLabel"` - This works on Safari, but VoiceOver in Chrome
// won't read out the description at all.
// 3. `<mat-option aria-labelledby="optionLabel groupLabel"` - This works on Chrome, but Safari
// doesn't read out the text at all. Furthermore, on
// Boilerplate for applying mixins to MatOptgroup.
/** @docs-private */
const _MatOptgroupMixinBase = mixinDisabled(class {
});
// Counter for unique group ids.
let _uniqueOptgroupIdCounter = 0;
export class _MatOptgroupBase extends _MatOptgroupMixinBase {
constructor(parent) {
super();
/** Unique id for the underlying label. */
this._labelId = `mat-optgroup-label-${_uniqueOptgroupIdCounter++}`;
this._inert = parent?.inertGroups ?? false;
}
}
_MatOptgroupBase.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: _MatOptgroupBase, deps: [{ token: MAT_OPTION_PARENT_COMPONENT, optional: true }], target: i0.ɵɵFactoryTarget.Directive });
_MatOptgroupBase.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "12.0.0", version: "13.0.0-next.15", type: _MatOptgroupBase, inputs: { label: "label" }, usesInheritance: true, ngImport: i0 });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: _MatOptgroupBase, decorators: [{
type: Directive
}], ctorParameters: function () { return [{ type: undefined, decorators: [{
type: Inject,
args: [MAT_OPTION_PARENT_COMPONENT]
}, {
type: Optional
}] }]; }, propDecorators: { label: [{
type: Input
}] } });
/**
* Injection token that can be used to reference instances of `MatOptgroup`. It serves as
* alternative token to the actual `MatOptgroup` class which could cause unnecessary
* retention of the class and its component metadata.
*/
export const MAT_OPTGROUP = new InjectionToken('MatOptgroup');
/**
* Component that is used to group instances of `mat-option`.
*/
export class MatOptgroup extends _MatOptgroupBase {
}
MatOptgroup.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: MatOptgroup, deps: null, target: i0.ɵɵFactoryTarget.Component });
MatOptgroup.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "12.0.0", version: "13.0.0-next.15", type: MatOptgroup, selector: "mat-optgroup", inputs: { disabled: "disabled" }, host: { properties: { "attr.role": "_inert ? null : \"group\"", "attr.aria-disabled": "_inert ? null : disabled.toString()", "attr.aria-labelledby": "_inert ? null : _labelId", "class.mat-optgroup-disabled": "disabled" }, classAttribute: "mat-optgroup" }, providers: [{ provide: MAT_OPTGROUP, useExisting: MatOptgroup }], exportAs: ["matOptgroup"], usesInheritance: true, ngImport: i0, template: "<span class=\"mat-optgroup-label\" aria-hidden=\"true\" [id]=\"_labelId\">{{ label }} <ng-content></ng-content></span>\n<ng-content select=\"mat-option, ng-container\"></ng-content>\n", styles: [".mat-optgroup-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;line-height:48px;height:48px;padding:0 16px;text-align:left;text-decoration:none;max-width:100%;-webkit-user-select:none;-moz-user-select:none;user-select:none;cursor:default}.mat-optgroup-label[disabled]{cursor:default}[dir=rtl] .mat-optgroup-label{text-align:right}.mat-optgroup-label .mat-icon{margin-right:16px;vertical-align:middle}.mat-optgroup-label .mat-icon svg{vertical-align:top}[dir=rtl] .mat-optgroup-label .mat-icon{margin-left:16px;margin-right:0}\n"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "13.0.0-next.15", ngImport: i0, type: MatOptgroup, decorators: [{
type: Component,
args: [{ selector: 'mat-optgroup', exportAs: 'matOptgroup', encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, inputs: ['disabled'], host: {
'class': 'mat-optgroup',
'[attr.role]': '_inert ? null : "group"',
'[attr.aria-disabled]': '_inert ? null : disabled.toString()',
'[attr.aria-labelledby]': '_inert ? null : _labelId',
'[class.mat-optgroup-disabled]': 'disabled',
}, providers: [{ provide: MAT_OPTGROUP, useExisting: MatOptgroup }], template: "<span class=\"mat-optgroup-label\" aria-hidden=\"true\" [id]=\"_labelId\">{{ label }} <ng-content></ng-content></span>\n<ng-content select=\"mat-option, ng-container\"></ng-content>\n", styles: [".mat-optgroup-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;line-height:48px;height:48px;padding:0 16px;text-align:left;text-decoration:none;max-width:100%;-webkit-user-select:none;-moz-user-select:none;user-select:none;cursor:default}.mat-optgroup-label[disabled]{cursor:default}[dir=rtl] .mat-optgroup-label{text-align:right}.mat-optgroup-label .mat-icon{margin-right:16px;vertical-align:middle}.mat-optgroup-label .mat-icon svg{vertical-align:top}[dir=rtl] .mat-optgroup-label .mat-icon{margin-left:16px;margin-right:0}\n"] }]
}] });
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