@angular/material
Version:
Angular Material
268 lines • 38.3 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { AriaDescriber, InteractivityChecker } from '@angular/cdk/a11y';
import { DOCUMENT } from '@angular/common';
import { booleanAttribute, Directive, ElementRef, inject, Inject, Input, NgZone, Optional, Renderer2, } from '@angular/core';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
import * as i0 from "@angular/core";
import * as i1 from "@angular/cdk/a11y";
let nextId = 0;
const BADGE_CONTENT_CLASS = 'mat-badge-content';
/** Directive to display a text badge. */
export class MatBadge {
/** The color of the badge. Can be `primary`, `accent`, or `warn`. */
get color() {
return this._color;
}
set color(value) {
this._setColor(value);
this._color = value;
}
/** The content for the badge */
get content() {
return this._content;
}
set content(newContent) {
this._updateRenderedContent(newContent);
}
/** Message used to describe the decorated element via aria-describedby */
get description() {
return this._description;
}
set description(newDescription) {
this._updateDescription(newDescription);
}
constructor(_ngZone, _elementRef, _ariaDescriber, _renderer, _animationMode) {
this._ngZone = _ngZone;
this._elementRef = _elementRef;
this._ariaDescriber = _ariaDescriber;
this._renderer = _renderer;
this._animationMode = _animationMode;
this._color = 'primary';
/** Whether the badge should overlap its contents or not */
this.overlap = true;
/**
* Position the badge should reside.
* Accepts any combination of 'above'|'below' and 'before'|'after'
*/
this.position = 'above after';
/** Size of the badge. Can be 'small', 'medium', or 'large'. */
this.size = 'medium';
/** Unique id for the badge */
this._id = nextId++;
/** Whether the OnInit lifecycle hook has run yet */
this._isInitialized = false;
/** InteractivityChecker to determine if the badge host is focusable. */
this._interactivityChecker = inject(InteractivityChecker);
this._document = inject(DOCUMENT);
if (typeof ngDevMode === 'undefined' || ngDevMode) {
const nativeElement = _elementRef.nativeElement;
if (nativeElement.nodeType !== nativeElement.ELEMENT_NODE) {
throw Error('matBadge must be attached to an element node.');
}
const matIconTagName = 'mat-icon';
// Heads-up for developers to avoid putting matBadge on <mat-icon>
// as it is aria-hidden by default docs mention this at:
// https://material.angular.io/components/badge/overview#accessibility
if (nativeElement.tagName.toLowerCase() === matIconTagName &&
nativeElement.getAttribute('aria-hidden') === 'true') {
console.warn(`Detected a matBadge on an "aria-hidden" "<mat-icon>". ` +
`Consider setting aria-hidden="false" in order to surface the information assistive technology.` +
`\n${nativeElement.outerHTML}`);
}
}
}
/** Whether the badge is above the host or not */
isAbove() {
return this.position.indexOf('below') === -1;
}
/** Whether the badge is after the host or not */
isAfter() {
return this.position.indexOf('before') === -1;
}
/**
* Gets the element into which the badge's content is being rendered. Undefined if the element
* hasn't been created (e.g. if the badge doesn't have content).
*/
getBadgeElement() {
return this._badgeElement;
}
ngOnInit() {
// We may have server-side rendered badge that we need to clear.
// We need to do this in ngOnInit because the full content of the component
// on which the badge is attached won't necessarily be in the DOM until this point.
this._clearExistingBadges();
if (this.content && !this._badgeElement) {
this._badgeElement = this._createBadgeElement();
this._updateRenderedContent(this.content);
}
this._isInitialized = true;
}
ngOnDestroy() {
// ViewEngine only: when creating a badge through the Renderer, Angular remembers its index.
// We have to destroy it ourselves, otherwise it'll be retained in memory.
if (this._renderer.destroyNode) {
this._renderer.destroyNode(this._badgeElement);
this._inlineBadgeDescription?.remove();
}
this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this.description);
}
/** Gets whether the badge's host element is interactive. */
_isHostInteractive() {
// Ignore visibility since it requires an expensive style caluclation.
return this._interactivityChecker.isFocusable(this._elementRef.nativeElement, {
ignoreVisibility: true,
});
}
/** Creates the badge element */
_createBadgeElement() {
const badgeElement = this._renderer.createElement('span');
const activeClass = 'mat-badge-active';
badgeElement.setAttribute('id', `mat-badge-content-${this._id}`);
// The badge is aria-hidden because we don't want it to appear in the page's navigation
// flow. Instead, we use the badge to describe the decorated element with aria-describedby.
badgeElement.setAttribute('aria-hidden', 'true');
badgeElement.classList.add(BADGE_CONTENT_CLASS);
if (this._animationMode === 'NoopAnimations') {
badgeElement.classList.add('_mat-animation-noopable');
}
this._elementRef.nativeElement.appendChild(badgeElement);
// animate in after insertion
if (typeof requestAnimationFrame === 'function' && this._animationMode !== 'NoopAnimations') {
this._ngZone.runOutsideAngular(() => {
requestAnimationFrame(() => {
badgeElement.classList.add(activeClass);
});
});
}
else {
badgeElement.classList.add(activeClass);
}
return badgeElement;
}
/** Update the text content of the badge element in the DOM, creating the element if necessary. */
_updateRenderedContent(newContent) {
const newContentNormalized = `${newContent ?? ''}`.trim();
// Don't create the badge element if the directive isn't initialized because we want to
// append the badge element to the *end* of the host element's content for backwards
// compatibility.
if (this._isInitialized && newContentNormalized && !this._badgeElement) {
this._badgeElement = this._createBadgeElement();
}
if (this._badgeElement) {
this._badgeElement.textContent = newContentNormalized;
}
this._content = newContentNormalized;
}
/** Updates the host element's aria description via AriaDescriber. */
_updateDescription(newDescription) {
// Always start by removing the aria-describedby; we will add a new one if necessary.
this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this.description);
// NOTE: We only check whether the host is interactive here, which happens during
// when then badge content changes. It is possible that the host changes
// interactivity status separate from one of these. However, watching the interactivity
// status of the host would require a `MutationObserver`, which is likely more code + overhead
// than it's worth; from usages inside Google, we see that the vats majority of badges either
// never change interactivity, or also set `matBadgeHidden` based on the same condition.
if (!newDescription || this._isHostInteractive()) {
this._removeInlineDescription();
}
this._description = newDescription;
// We don't add `aria-describedby` for non-interactive hosts elements because we
// instead insert the description inline.
if (this._isHostInteractive()) {
this._ariaDescriber.describe(this._elementRef.nativeElement, newDescription);
}
else {
this._updateInlineDescription();
}
}
_updateInlineDescription() {
// Create the inline description element if it doesn't exist
if (!this._inlineBadgeDescription) {
this._inlineBadgeDescription = this._document.createElement('span');
this._inlineBadgeDescription.classList.add('cdk-visually-hidden');
}
this._inlineBadgeDescription.textContent = this.description;
this._badgeElement?.appendChild(this._inlineBadgeDescription);
}
_removeInlineDescription() {
this._inlineBadgeDescription?.remove();
this._inlineBadgeDescription = undefined;
}
/** Adds css theme class given the color to the component host */
_setColor(colorPalette) {
const classList = this._elementRef.nativeElement.classList;
classList.remove(`mat-badge-${this._color}`);
if (colorPalette) {
classList.add(`mat-badge-${colorPalette}`);
}
}
/** Clears any existing badges that might be left over from server-side rendering. */
_clearExistingBadges() {
// Only check direct children of this host element in order to avoid deleting
// any badges that might exist in descendant elements.
const badges = this._elementRef.nativeElement.querySelectorAll(`:scope > .${BADGE_CONTENT_CLASS}`);
for (const badgeElement of Array.from(badges)) {
if (badgeElement !== this._badgeElement) {
badgeElement.remove();
}
}
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: MatBadge, deps: [{ token: i0.NgZone }, { token: i0.ElementRef }, { token: i1.AriaDescriber }, { token: i0.Renderer2 }, { token: ANIMATION_MODULE_TYPE, optional: true }], target: i0.ɵɵFactoryTarget.Directive }); }
static { this.ɵdir = i0.ɵɵngDeclareDirective({ minVersion: "16.1.0", version: "17.0.0", type: MatBadge, selector: "[matBadge]", inputs: { color: ["matBadgeColor", "color"], overlap: ["matBadgeOverlap", "overlap", booleanAttribute], disabled: ["matBadgeDisabled", "disabled", booleanAttribute], position: ["matBadgePosition", "position"], content: ["matBadge", "content"], description: ["matBadgeDescription", "description"], size: ["matBadgeSize", "size"], hidden: ["matBadgeHidden", "hidden", booleanAttribute] }, host: { properties: { "class.mat-badge-overlap": "overlap", "class.mat-badge-above": "isAbove()", "class.mat-badge-below": "!isAbove()", "class.mat-badge-before": "!isAfter()", "class.mat-badge-after": "isAfter()", "class.mat-badge-small": "size === \"small\"", "class.mat-badge-medium": "size === \"medium\"", "class.mat-badge-large": "size === \"large\"", "class.mat-badge-hidden": "hidden || !content", "class.mat-badge-disabled": "disabled" }, classAttribute: "mat-badge" }, ngImport: i0 }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: MatBadge, decorators: [{
type: Directive,
args: [{
selector: '[matBadge]',
host: {
'class': 'mat-badge',
'[class.mat-badge-overlap]': 'overlap',
'[class.mat-badge-above]': 'isAbove()',
'[class.mat-badge-below]': '!isAbove()',
'[class.mat-badge-before]': '!isAfter()',
'[class.mat-badge-after]': 'isAfter()',
'[class.mat-badge-small]': 'size === "small"',
'[class.mat-badge-medium]': 'size === "medium"',
'[class.mat-badge-large]': 'size === "large"',
'[class.mat-badge-hidden]': 'hidden || !content',
'[class.mat-badge-disabled]': 'disabled',
},
}]
}], ctorParameters: () => [{ type: i0.NgZone }, { type: i0.ElementRef }, { type: i1.AriaDescriber }, { type: i0.Renderer2 }, { type: undefined, decorators: [{
type: Optional
}, {
type: Inject,
args: [ANIMATION_MODULE_TYPE]
}] }], propDecorators: { color: [{
type: Input,
args: ['matBadgeColor']
}], overlap: [{
type: Input,
args: [{ alias: 'matBadgeOverlap', transform: booleanAttribute }]
}], disabled: [{
type: Input,
args: [{ alias: 'matBadgeDisabled', transform: booleanAttribute }]
}], position: [{
type: Input,
args: ['matBadgePosition']
}], content: [{
type: Input,
args: ['matBadge']
}], description: [{
type: Input,
args: ['matBadgeDescription']
}], size: [{
type: Input,
args: ['matBadgeSize']
}], hidden: [{
type: Input,
args: [{ alias: 'matBadgeHidden', transform: booleanAttribute }]
}] } });
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {AriaDescriber, InteractivityChecker} from '@angular/cdk/a11y';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  booleanAttribute,\n  Directive,\n  ElementRef,\n  inject,\n  Inject,\n  Input,\n  NgZone,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Renderer2,\n} from '@angular/core';\nimport {ThemePalette} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\nlet nextId = 0;\n\n/** Allowed position options for matBadgePosition */\nexport type MatBadgePosition =\n  | 'above after'\n  | 'above before'\n  | 'below before'\n  | 'below after'\n  | 'before'\n  | 'after'\n  | 'above'\n  | 'below';\n\n/** Allowed size options for matBadgeSize */\nexport type MatBadgeSize = 'small' | 'medium' | 'large';\n\nconst BADGE_CONTENT_CLASS = 'mat-badge-content';\n\n/** Directive to display a text badge. */\n@Directive({\n  selector: '[matBadge]',\n  host: {\n    'class': 'mat-badge',\n    '[class.mat-badge-overlap]': 'overlap',\n    '[class.mat-badge-above]': 'isAbove()',\n    '[class.mat-badge-below]': '!isAbove()',\n    '[class.mat-badge-before]': '!isAfter()',\n    '[class.mat-badge-after]': 'isAfter()',\n    '[class.mat-badge-small]': 'size === \"small\"',\n    '[class.mat-badge-medium]': 'size === \"medium\"',\n    '[class.mat-badge-large]': 'size === \"large\"',\n    '[class.mat-badge-hidden]': 'hidden || !content',\n    '[class.mat-badge-disabled]': 'disabled',\n  },\n})\nexport class MatBadge implements OnInit, OnDestroy {\n  /** The color of the badge. Can be `primary`, `accent`, or `warn`. */\n  @Input('matBadgeColor')\n  get color(): ThemePalette {\n    return this._color;\n  }\n  set color(value: ThemePalette) {\n    this._setColor(value);\n    this._color = value;\n  }\n  private _color: ThemePalette = 'primary';\n\n  /** Whether the badge should overlap its contents or not */\n  @Input({alias: 'matBadgeOverlap', transform: booleanAttribute}) overlap: boolean = true;\n\n  /** Whether the badge is disabled. */\n  @Input({alias: 'matBadgeDisabled', transform: booleanAttribute}) disabled: boolean;\n\n  /**\n   * Position the badge should reside.\n   * Accepts any combination of 'above'|'below' and 'before'|'after'\n   */\n  @Input('matBadgePosition') position: MatBadgePosition = 'above after';\n\n  /** The content for the badge */\n  @Input('matBadge')\n  get content(): string | number | undefined | null {\n    return this._content;\n  }\n  set content(newContent: string | number | undefined | null) {\n    this._updateRenderedContent(newContent);\n  }\n  private _content: string | number | undefined | null;\n\n  /** Message used to describe the decorated element via aria-describedby */\n  @Input('matBadgeDescription')\n  get description(): string {\n    return this._description;\n  }\n  set description(newDescription: string) {\n    this._updateDescription(newDescription);\n  }\n  private _description: string;\n\n  /** Size of the badge. Can be 'small', 'medium', or 'large'. */\n  @Input('matBadgeSize') size: MatBadgeSize = 'medium';\n\n  /** Whether the badge is hidden. */\n  @Input({alias: 'matBadgeHidden', transform: booleanAttribute}) hidden: boolean;\n\n  /** Unique id for the badge */\n  _id: number = nextId++;\n\n  /** Visible badge element. */\n  private _badgeElement: HTMLElement | undefined;\n\n  /** Inline badge description. Used when the badge is applied to non-interactive host elements. */\n  private _inlineBadgeDescription: HTMLElement | undefined;\n\n  /** Whether the OnInit lifecycle hook has run yet */\n  private _isInitialized = false;\n\n  /** InteractivityChecker to determine if the badge host is focusable. */\n  private _interactivityChecker = inject(InteractivityChecker);\n\n  private _document = inject(DOCUMENT);\n\n  constructor(\n    private _ngZone: NgZone,\n    private _elementRef: ElementRef<HTMLElement>,\n    private _ariaDescriber: AriaDescriber,\n    private _renderer: Renderer2,\n    @Optional() @Inject(ANIMATION_MODULE_TYPE) private _animationMode?: string,\n  ) {\n    if (typeof ngDevMode === 'undefined' || ngDevMode) {\n      const nativeElement = _elementRef.nativeElement;\n      if (nativeElement.nodeType !== nativeElement.ELEMENT_NODE) {\n        throw Error('matBadge must be attached to an element node.');\n      }\n\n      const matIconTagName: string = 'mat-icon';\n\n      // Heads-up for developers to avoid putting matBadge on <mat-icon>\n      // as it is aria-hidden by default docs mention this at:\n      // https://material.angular.io/components/badge/overview#accessibility\n      if (\n        nativeElement.tagName.toLowerCase() === matIconTagName &&\n        nativeElement.getAttribute('aria-hidden') === 'true'\n      ) {\n        console.warn(\n          `Detected a matBadge on an \"aria-hidden\" \"<mat-icon>\". ` +\n            `Consider setting aria-hidden=\"false\" in order to surface the information assistive technology.` +\n            `\\n${nativeElement.outerHTML}`,\n        );\n      }\n    }\n  }\n\n  /** Whether the badge is above the host or not */\n  isAbove(): boolean {\n    return this.position.indexOf('below') === -1;\n  }\n\n  /** Whether the badge is after the host or not */\n  isAfter(): boolean {\n    return this.position.indexOf('before') === -1;\n  }\n\n  /**\n   * Gets the element into which the badge's content is being rendered. Undefined if the element\n   * hasn't been created (e.g. if the badge doesn't have content).\n   */\n  getBadgeElement(): HTMLElement | undefined {\n    return this._badgeElement;\n  }\n\n  ngOnInit() {\n    // We may have server-side rendered badge that we need to clear.\n    // We need to do this in ngOnInit because the full content of the component\n    // on which the badge is attached won't necessarily be in the DOM until this point.\n    this._clearExistingBadges();\n\n    if (this.content && !this._badgeElement) {\n      this._badgeElement = this._createBadgeElement();\n      this._updateRenderedContent(this.content);\n    }\n\n    this._isInitialized = true;\n  }\n\n  ngOnDestroy() {\n    // ViewEngine only: when creating a badge through the Renderer, Angular remembers its index.\n    // We have to destroy it ourselves, otherwise it'll be retained in memory.\n    if (this._renderer.destroyNode) {\n      this._renderer.destroyNode(this._badgeElement);\n      this._inlineBadgeDescription?.remove();\n    }\n\n    this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this.description);\n  }\n\n  /** Gets whether the badge's host element is interactive. */\n  private _isHostInteractive(): boolean {\n    // Ignore visibility since it requires an expensive style caluclation.\n    return this._interactivityChecker.isFocusable(this._elementRef.nativeElement, {\n      ignoreVisibility: true,\n    });\n  }\n\n  /** Creates the badge element */\n  private _createBadgeElement(): HTMLElement {\n    const badgeElement = this._renderer.createElement('span');\n    const activeClass = 'mat-badge-active';\n\n    badgeElement.setAttribute('id', `mat-badge-content-${this._id}`);\n\n    // The badge is aria-hidden because we don't want it to appear in the page's navigation\n    // flow. Instead, we use the badge to describe the decorated element with aria-describedby.\n    badgeElement.setAttribute('aria-hidden', 'true');\n    badgeElement.classList.add(BADGE_CONTENT_CLASS);\n\n    if (this._animationMode === 'NoopAnimations') {\n      badgeElement.classList.add('_mat-animation-noopable');\n    }\n\n    this._elementRef.nativeElement.appendChild(badgeElement);\n\n    // animate in after insertion\n    if (typeof requestAnimationFrame === 'function' && this._animationMode !== 'NoopAnimations') {\n      this._ngZone.runOutsideAngular(() => {\n        requestAnimationFrame(() => {\n          badgeElement.classList.add(activeClass);\n        });\n      });\n    } else {\n      badgeElement.classList.add(activeClass);\n    }\n\n    return badgeElement;\n  }\n\n  /** Update the text content of the badge element in the DOM, creating the element if necessary. */\n  private _updateRenderedContent(newContent: string | number | undefined | null): void {\n    const newContentNormalized: string = `${newContent ?? ''}`.trim();\n\n    // Don't create the badge element if the directive isn't initialized because we want to\n    // append the badge element to the *end* of the host element's content for backwards\n    // compatibility.\n    if (this._isInitialized && newContentNormalized && !this._badgeElement) {\n      this._badgeElement = this._createBadgeElement();\n    }\n\n    if (this._badgeElement) {\n      this._badgeElement.textContent = newContentNormalized;\n    }\n\n    this._content = newContentNormalized;\n  }\n\n  /** Updates the host element's aria description via AriaDescriber. */\n  private _updateDescription(newDescription: string): void {\n    // Always start by removing the aria-describedby; we will add a new one if necessary.\n    this._ariaDescriber.removeDescription(this._elementRef.nativeElement, this.description);\n\n    // NOTE: We only check whether the host is interactive here, which happens during\n    // when then badge content changes. It is possible that the host changes\n    // interactivity status separate from one of these. However, watching the interactivity\n    // status of the host would require a `MutationObserver`, which is likely more code + overhead\n    // than it's worth; from usages inside Google, we see that the vats majority of badges either\n    // never change interactivity, or also set `matBadgeHidden` based on the same condition.\n\n    if (!newDescription || this._isHostInteractive()) {\n      this._removeInlineDescription();\n    }\n\n    this._description = newDescription;\n\n    // We don't add `aria-describedby` for non-interactive hosts elements because we\n    // instead insert the description inline.\n    if (this._isHostInteractive()) {\n      this._ariaDescriber.describe(this._elementRef.nativeElement, newDescription);\n    } else {\n      this._updateInlineDescription();\n    }\n  }\n\n  private _updateInlineDescription() {\n    // Create the inline description element if it doesn't exist\n    if (!this._inlineBadgeDescription) {\n      this._inlineBadgeDescription = this._document.createElement('span');\n      this._inlineBadgeDescription.classList.add('cdk-visually-hidden');\n    }\n\n    this._inlineBadgeDescription.textContent = this.description;\n    this._badgeElement?.appendChild(this._inlineBadgeDescription);\n  }\n\n  private _removeInlineDescription() {\n    this._inlineBadgeDescription?.remove();\n    this._inlineBadgeDescription = undefined;\n  }\n\n  /** Adds css theme class given the color to the component host */\n  private _setColor(colorPalette: ThemePalette) {\n    const classList = this._elementRef.nativeElement.classList;\n    classList.remove(`mat-badge-${this._color}`);\n    if (colorPalette) {\n      classList.add(`mat-badge-${colorPalette}`);\n    }\n  }\n\n  /** Clears any existing badges that might be left over from server-side rendering. */\n  private _clearExistingBadges() {\n    // Only check direct children of this host element in order to avoid deleting\n    // any badges that might exist in descendant elements.\n    const badges = this._elementRef.nativeElement.querySelectorAll(\n      `:scope > .${BADGE_CONTENT_CLASS}`,\n    );\n    for (const badgeElement of Array.from(badges)) {\n      if (badgeElement !== this._badgeElement) {\n        badgeElement.remove();\n      }\n    }\n  }\n}\n"]}