@angular/material
Version:
Angular Material
223 lines • 29 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 } from '@angular/cdk/a11y';
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { Directive, ElementRef, Inject, Input, NgZone, Optional, Renderer2, isDevMode, } from '@angular/core';
import { mixinDisabled } from '@angular/material/core';
import { ANIMATION_MODULE_TYPE } from '@angular/platform-browser/animations';
let nextId = 0;
// Boilerplate for applying mixins to MatBadge.
/** @docs-private */
class MatBadgeBase {
}
const _MatBadgeMixinBase = mixinDisabled(MatBadgeBase);
/** Directive to display a text badge. */
export class MatBadge extends _MatBadgeMixinBase {
constructor(_ngZone, _elementRef, _ariaDescriber, _renderer, _animationMode) {
super();
this._ngZone = _ngZone;
this._elementRef = _elementRef;
this._ariaDescriber = _ariaDescriber;
this._renderer = _renderer;
this._animationMode = _animationMode;
/** Whether the badge has any content. */
this._hasContent = false;
this._color = 'primary';
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++;
if (isDevMode()) {
const nativeElement = _elementRef.nativeElement;
if (nativeElement.nodeType !== nativeElement.ELEMENT_NODE) {
throw Error('matBadge must be attached to an element node.');
}
}
}
/** 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;
}
/** Whether the badge should overlap its contents or not */
get overlap() { return this._overlap; }
set overlap(val) {
this._overlap = coerceBooleanProperty(val);
}
/** Message used to describe the decorated element via aria-describedby */
get description() { return this._description; }
set description(newDescription) {
if (newDescription !== this._description) {
const badgeElement = this._badgeElement;
this._updateHostAriaDescription(newDescription, this._description);
this._description = newDescription;
if (badgeElement) {
newDescription ? badgeElement.setAttribute('aria-label', newDescription) :
badgeElement.removeAttribute('aria-label');
}
}
}
/** Whether the badge is hidden. */
get hidden() { return this._hidden; }
set hidden(val) {
this._hidden = coerceBooleanProperty(val);
}
/** 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;
}
ngOnChanges(changes) {
const contentChange = changes['content'];
if (contentChange) {
const value = contentChange.currentValue;
this._hasContent = value != null && `${value}`.trim().length > 0;
this._updateTextContent();
}
}
ngOnDestroy() {
const badgeElement = this._badgeElement;
if (badgeElement) {
if (this.description) {
this._ariaDescriber.removeDescription(badgeElement, this.description);
}
// When creating a badge through the Renderer, Angular will keep it in an index.
// We have to destroy it ourselves, otherwise it'll be retained in memory.
if (this._renderer.destroyNode) {
this._renderer.destroyNode(badgeElement);
}
}
}
/**
* Gets the element into which the badge's content is being rendered.
* Undefined if the element hasn't been created (e.g. if the badge doesn't have content).
*/
getBadgeElement() {
return this._badgeElement;
}
/** Injects a span element into the DOM with the content. */
_updateTextContent() {
if (!this._badgeElement) {
this._badgeElement = this._createBadgeElement();
}
else {
this._badgeElement.textContent = this.content;
}
return this._badgeElement;
}
/** Creates the badge element */
_createBadgeElement() {
const badgeElement = this._renderer.createElement('span');
const activeClass = 'mat-badge-active';
const contentClass = 'mat-badge-content';
// Clear any existing badges which may have persisted from a server-side render.
this._clearExistingBadges(contentClass);
badgeElement.setAttribute('id', `mat-badge-content-${this._id}`);
badgeElement.classList.add(contentClass);
badgeElement.textContent = this.content;
if (this._animationMode === 'NoopAnimations') {
badgeElement.classList.add('_mat-animation-noopable');
}
if (this.description) {
badgeElement.setAttribute('aria-label', this.description);
}
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;
}
/** Sets the aria-label property on the element */
_updateHostAriaDescription(newDescription, oldDescription) {
// ensure content available before setting label
const content = this._updateTextContent();
if (oldDescription) {
this._ariaDescriber.removeDescription(content, oldDescription);
}
if (newDescription) {
this._ariaDescriber.describe(content, newDescription);
}
}
/** Adds css theme class given the color to the component host */
_setColor(colorPalette) {
if (colorPalette !== this._color) {
if (this._color) {
this._elementRef.nativeElement.classList.remove(`mat-badge-${this._color}`);
}
if (colorPalette) {
this._elementRef.nativeElement.classList.add(`mat-badge-${colorPalette}`);
}
}
}
/** Clears any existing badges that might be left over from server-side rendering. */
_clearExistingBadges(cssClass) {
const element = this._elementRef.nativeElement;
let childCount = element.children.length;
// Use a reverse while, because we'll be removing elements from the list as we're iterating.
while (childCount--) {
const currentChild = element.children[childCount];
if (currentChild.classList.contains(cssClass)) {
element.removeChild(currentChild);
}
}
}
}
MatBadge.decorators = [
{ type: Directive, args: [{
selector: '[matBadge]',
inputs: ['disabled: matBadgeDisabled'],
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 || !_hasContent',
'[class.mat-badge-disabled]': 'disabled',
},
},] }
];
MatBadge.ctorParameters = () => [
{ type: NgZone },
{ type: ElementRef },
{ type: AriaDescriber },
{ type: Renderer2 },
{ type: String, decorators: [{ type: Optional }, { type: Inject, args: [ANIMATION_MODULE_TYPE,] }] }
];
MatBadge.propDecorators = {
color: [{ type: Input, args: ['matBadgeColor',] }],
overlap: [{ type: Input, args: ['matBadgeOverlap',] }],
position: [{ type: Input, args: ['matBadgePosition',] }],
content: [{ type: Input, args: ['matBadge',] }],
description: [{ type: Input, args: ['matBadgeDescription',] }],
size: [{ type: Input, args: ['matBadgeSize',] }],
hidden: [{ type: Input, args: ['matBadgeHidden',] }]
};
//# 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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} from '@angular/cdk/a11y';\nimport {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {\n  Directive,\n  ElementRef,\n  Inject,\n  Input,\n  NgZone,\n  OnChanges,\n  OnDestroy,\n  Optional,\n  Renderer2,\n  SimpleChanges,\n  isDevMode,\n} from '@angular/core';\nimport {CanDisable, CanDisableCtor, mixinDisabled, ThemePalette} from '@angular/material/core';\nimport {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';\n\n\nlet nextId = 0;\n\n// Boilerplate for applying mixins to MatBadge.\n/** @docs-private */\nclass MatBadgeBase {}\n\nconst _MatBadgeMixinBase:\n    CanDisableCtor & typeof MatBadgeBase = mixinDisabled(MatBadgeBase);\n\n/** Allowed position options for matBadgePosition */\nexport type MatBadgePosition =\n    'above after' | 'above before' | 'below before' | 'below after' |\n    'before' | 'after' | 'above' | 'below';\n\n/** Allowed size options for matBadgeSize */\nexport type MatBadgeSize = 'small' | 'medium' | 'large';\n\n/** Directive to display a text badge. */\n@Directive({\n  selector: '[matBadge]',\n  inputs: ['disabled: matBadgeDisabled'],\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 || !_hasContent',\n    '[class.mat-badge-disabled]': 'disabled',\n  },\n})\nexport class MatBadge extends _MatBadgeMixinBase implements OnDestroy, OnChanges, CanDisable {\n  /** Whether the badge has any content. */\n  _hasContent = false;\n\n  /** The color of the badge. Can be `primary`, `accent`, or `warn`. */\n  @Input('matBadgeColor')\n  get color(): ThemePalette { return this._color; }\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('matBadgeOverlap')\n  get overlap(): boolean { return this._overlap; }\n  set overlap(val: boolean) {\n    this._overlap = coerceBooleanProperty(val);\n  }\n  private _overlap: boolean = true;\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') content: string;\n\n  /** Message used to describe the decorated element via aria-describedby */\n  @Input('matBadgeDescription')\n  get description(): string { return this._description; }\n  set description(newDescription: string) {\n    if (newDescription !== this._description) {\n      const badgeElement = this._badgeElement;\n      this._updateHostAriaDescription(newDescription, this._description);\n      this._description = newDescription;\n\n      if (badgeElement) {\n        newDescription ? badgeElement.setAttribute('aria-label', newDescription) :\n            badgeElement.removeAttribute('aria-label');\n      }\n    }\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('matBadgeHidden')\n  get hidden(): boolean { return this._hidden; }\n  set hidden(val: boolean) {\n    this._hidden = coerceBooleanProperty(val);\n  }\n  private _hidden: boolean;\n\n  /** Unique id for the badge */\n  _id: number = nextId++;\n\n  private _badgeElement: HTMLElement | undefined;\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      super();\n\n      if (isDevMode()) {\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    }\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  ngOnChanges(changes: SimpleChanges) {\n    const contentChange = changes['content'];\n\n    if (contentChange) {\n      const value = contentChange.currentValue;\n      this._hasContent = value != null && `${value}`.trim().length > 0;\n      this._updateTextContent();\n    }\n  }\n\n  ngOnDestroy() {\n    const badgeElement = this._badgeElement;\n\n    if (badgeElement) {\n      if (this.description) {\n        this._ariaDescriber.removeDescription(badgeElement, this.description);\n      }\n\n      // When creating a badge through the Renderer, Angular will keep it in an index.\n      // We have to destroy it ourselves, otherwise it'll be retained in memory.\n      if (this._renderer.destroyNode) {\n        this._renderer.destroyNode(badgeElement);\n      }\n    }\n  }\n\n  /**\n   * Gets the element into which the badge's content is being rendered.\n   * Undefined if the element hasn't been created (e.g. if the badge doesn't have content).\n   */\n  getBadgeElement(): HTMLElement | undefined {\n    return this._badgeElement;\n  }\n\n  /** Injects a span element into the DOM with the content. */\n  private _updateTextContent(): HTMLSpanElement {\n    if (!this._badgeElement) {\n      this._badgeElement = this._createBadgeElement();\n    } else {\n      this._badgeElement.textContent = this.content;\n    }\n    return this._badgeElement;\n  }\n\n  /** Creates the badge element */\n  private _createBadgeElement(): HTMLElement {\n    const badgeElement = this._renderer.createElement('span');\n    const activeClass = 'mat-badge-active';\n    const contentClass = 'mat-badge-content';\n\n    // Clear any existing badges which may have persisted from a server-side render.\n    this._clearExistingBadges(contentClass);\n    badgeElement.setAttribute('id', `mat-badge-content-${this._id}`);\n    badgeElement.classList.add(contentClass);\n    badgeElement.textContent = this.content;\n\n    if (this._animationMode === 'NoopAnimations') {\n      badgeElement.classList.add('_mat-animation-noopable');\n    }\n\n    if (this.description) {\n      badgeElement.setAttribute('aria-label', this.description);\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  /** Sets the aria-label property on the element */\n  private _updateHostAriaDescription(newDescription: string, oldDescription: string): void {\n    // ensure content available before setting label\n    const content = this._updateTextContent();\n\n    if (oldDescription) {\n      this._ariaDescriber.removeDescription(content, oldDescription);\n    }\n\n    if (newDescription) {\n      this._ariaDescriber.describe(content, newDescription);\n    }\n  }\n\n  /** Adds css theme class given the color to the component host */\n  private _setColor(colorPalette: ThemePalette) {\n    if (colorPalette !== this._color) {\n      if (this._color) {\n        this._elementRef.nativeElement.classList.remove(`mat-badge-${this._color}`);\n      }\n      if (colorPalette) {\n        this._elementRef.nativeElement.classList.add(`mat-badge-${colorPalette}`);\n      }\n    }\n  }\n\n  /** Clears any existing badges that might be left over from server-side rendering. */\n  private _clearExistingBadges(cssClass: string) {\n    const element = this._elementRef.nativeElement;\n    let childCount = element.children.length;\n\n    // Use a reverse while, because we'll be removing elements from the list as we're iterating.\n    while (childCount--) {\n      const currentChild = element.children[childCount];\n\n      if (currentChild.classList.contains(cssClass)) {\n        element.removeChild(currentChild);\n      }\n    }\n  }\n\n  static ngAcceptInputType_disabled: BooleanInput;\n  static ngAcceptInputType_hidden: BooleanInput;\n  static ngAcceptInputType_overlap: BooleanInput;\n}\n"]}