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@angular/material

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/** * @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 { DOCUMENT } from '@angular/common'; import { Attribute, booleanAttribute, ChangeDetectionStrategy, Component, ElementRef, ErrorHandler, inject, Inject, InjectionToken, Input, Optional, ViewEncapsulation, } from '@angular/core'; import { Subscription } from 'rxjs'; import { take } from 'rxjs/operators'; import { MatIconRegistry } from './icon-registry'; import * as i0 from "@angular/core"; import * as i1 from "./icon-registry"; /** Injection token to be used to override the default options for `mat-icon`. */ export const MAT_ICON_DEFAULT_OPTIONS = new InjectionToken('MAT_ICON_DEFAULT_OPTIONS'); /** * Injection token used to provide the current location to `MatIcon`. * Used to handle server-side rendering and to stub out during unit tests. * @docs-private */ export const MAT_ICON_LOCATION = new InjectionToken('mat-icon-location', { providedIn: 'root', factory: MAT_ICON_LOCATION_FACTORY, }); /** @docs-private */ export function MAT_ICON_LOCATION_FACTORY() { const _document = inject(DOCUMENT); const _location = _document ? _document.location : null; return { // Note that this needs to be a function, rather than a property, because Angular // will only resolve it once, but we want the current path on each call. getPathname: () => (_location ? _location.pathname + _location.search : ''), }; } /** SVG attributes that accept a FuncIRI (e.g. `url(<something>)`). */ const funcIriAttributes = [ 'clip-path', 'color-profile', 'src', 'cursor', 'fill', 'filter', 'marker', 'marker-start', 'marker-mid', 'marker-end', 'mask', 'stroke', ]; /** Selector that can be used to find all elements that are using a `FuncIRI`. */ const funcIriAttributeSelector = funcIriAttributes.map(attr => `[${attr}]`).join(', '); /** Regex that can be used to extract the id out of a FuncIRI. */ const funcIriPattern = /^url\(['"]?#(.*?)['"]?\)$/; /** * Component to display an icon. It can be used in the following ways: * * - Specify the svgIcon input to load an SVG icon from a URL previously registered with the * addSvgIcon, addSvgIconInNamespace, addSvgIconSet, or addSvgIconSetInNamespace methods of * MatIconRegistry. If the svgIcon value contains a colon it is assumed to be in the format * "[namespace]:[name]", if not the value will be the name of an icon in the default namespace. * Examples: * `<mat-icon svgIcon="left-arrow"></mat-icon> * <mat-icon svgIcon="animals:cat"></mat-icon>` * * - Use a font ligature as an icon by putting the ligature text in the `fontIcon` attribute or the * content of the `<mat-icon>` component. If you register a custom font class, don't forget to also * include the special class `mat-ligature-font`. It is recommended to use the attribute alternative * to prevent the ligature text to be selectable and to appear in search engine results. * By default, the Material icons font is used as described at * http://google.github.io/material-design-icons/#icon-font-for-the-web. You can specify an * alternate font by setting the fontSet input to either the CSS class to apply to use the * desired font, or to an alias previously registered with MatIconRegistry.registerFontClassAlias. * Examples: * `<mat-icon fontIcon="home"></mat-icon> * <mat-icon>home</mat-icon> * <mat-icon fontSet="myfont" fontIcon="sun"></mat-icon> * <mat-icon fontSet="myfont">sun</mat-icon>` * * - Specify a font glyph to be included via CSS rules by setting the fontSet input to specify the * font, and the fontIcon input to specify the icon. Typically the fontIcon will specify a * CSS class which causes the glyph to be displayed via a :before selector, as in * https://fortawesome.github.io/Font-Awesome/examples/ * Example: * `<mat-icon fontSet="fa" fontIcon="alarm"></mat-icon>` */ export class MatIcon { /** * Theme color of the icon. This API is supported in M2 themes only, it * has no effect in M3 themes. * * For information on applying color variants in M3, see * https://material.angular.io/guide/theming#using-component-color-variants. */ get color() { return this._color || this._defaultColor; } set color(value) { this._color = value; } /** Name of the icon in the SVG icon set. */ get svgIcon() { return this._svgIcon; } set svgIcon(value) { if (value !== this._svgIcon) { if (value) { this._updateSvgIcon(value); } else if (this._svgIcon) { this._clearSvgElement(); } this._svgIcon = value; } } /** Font set that the icon is a part of. */ get fontSet() { return this._fontSet; } set fontSet(value) { const newValue = this._cleanupFontValue(value); if (newValue !== this._fontSet) { this._fontSet = newValue; this._updateFontIconClasses(); } } /** Name of an icon within a font set. */ get fontIcon() { return this._fontIcon; } set fontIcon(value) { const newValue = this._cleanupFontValue(value); if (newValue !== this._fontIcon) { this._fontIcon = newValue; this._updateFontIconClasses(); } } constructor(_elementRef, _iconRegistry, ariaHidden, _location, _errorHandler, defaults) { this._elementRef = _elementRef; this._iconRegistry = _iconRegistry; this._location = _location; this._errorHandler = _errorHandler; /** * Whether the icon should be inlined, automatically sizing the icon to match the font size of * the element the icon is contained in. */ this.inline = false; this._previousFontSetClass = []; /** Subscription to the current in-progress SVG icon request. */ this._currentIconFetch = Subscription.EMPTY; if (defaults) { if (defaults.color) { this.color = this._defaultColor = defaults.color; } if (defaults.fontSet) { this.fontSet = defaults.fontSet; } } // If the user has not explicitly set aria-hidden, mark the icon as hidden, as this is // the right thing to do for the majority of icon use-cases. if (!ariaHidden) { _elementRef.nativeElement.setAttribute('aria-hidden', 'true'); } } /** * Splits an svgIcon binding value into its icon set and icon name components. * Returns a 2-element array of [(icon set), (icon name)]. * The separator for the two fields is ':'. If there is no separator, an empty * string is returned for the icon set and the entire value is returned for * the icon name. If the argument is falsy, returns an array of two empty strings. * Throws an error if the name contains two or more ':' separators. * Examples: * `'social:cake' -> ['social', 'cake'] * 'penguin' -> ['', 'penguin'] * null -> ['', ''] * 'a:b:c' -> (throws Error)` */ _splitIconName(iconName) { if (!iconName) { return ['', '']; } const parts = iconName.split(':'); switch (parts.length) { case 1: return ['', parts[0]]; // Use default namespace. case 2: return parts; default: throw Error(`Invalid icon name: "${iconName}"`); // TODO: add an ngDevMode check } } ngOnInit() { // Update font classes because ngOnChanges won't be called if none of the inputs are present, // e.g. <mat-icon>arrow</mat-icon> In this case we need to add a CSS class for the default font. this._updateFontIconClasses(); } ngAfterViewChecked() { const cachedElements = this._elementsWithExternalReferences; if (cachedElements && cachedElements.size) { const newPath = this._location.getPathname(); // We need to check whether the URL has changed on each change detection since // the browser doesn't have an API that will let us react on link clicks and // we can't depend on the Angular router. The references need to be updated, // because while most browsers don't care whether the URL is correct after // the first render, Safari will break if the user navigates to a different // page and the SVG isn't re-rendered. if (newPath !== this._previousPath) { this._previousPath = newPath; this._prependPathToReferences(newPath); } } } ngOnDestroy() { this._currentIconFetch.unsubscribe(); if (this._elementsWithExternalReferences) { this._elementsWithExternalReferences.clear(); } } _usingFontIcon() { return !this.svgIcon; } _setSvgElement(svg) { this._clearSvgElement(); // Note: we do this fix here, rather than the icon registry, because the // references have to point to the URL at the time that the icon was created. const path = this._location.getPathname(); this._previousPath = path; this._cacheChildrenWithExternalReferences(svg); this._prependPathToReferences(path); this._elementRef.nativeElement.appendChild(svg); } _clearSvgElement() { const layoutElement = this._elementRef.nativeElement; let childCount = layoutElement.childNodes.length; if (this._elementsWithExternalReferences) { this._elementsWithExternalReferences.clear(); } // Remove existing non-element child nodes and SVGs, and add the new SVG element. Note that // we can't use innerHTML, because IE will throw if the element has a data binding. while (childCount--) { const child = layoutElement.childNodes[childCount]; // 1 corresponds to Node.ELEMENT_NODE. We remove all non-element nodes in order to get rid // of any loose text nodes, as well as any SVG elements in order to remove any old icons. if (child.nodeType !== 1 || child.nodeName.toLowerCase() === 'svg') { child.remove(); } } } _updateFontIconClasses() { if (!this._usingFontIcon()) { return; } const elem = this._elementRef.nativeElement; const fontSetClasses = (this.fontSet ? this._iconRegistry.classNameForFontAlias(this.fontSet).split(/ +/) : this._iconRegistry.getDefaultFontSetClass()).filter(className => className.length > 0); this._previousFontSetClass.forEach(className => elem.classList.remove(className)); fontSetClasses.forEach(className => elem.classList.add(className)); this._previousFontSetClass = fontSetClasses; if (this.fontIcon !== this._previousFontIconClass && !fontSetClasses.includes('mat-ligature-font')) { if (this._previousFontIconClass) { elem.classList.remove(this._previousFontIconClass); } if (this.fontIcon) { elem.classList.add(this.fontIcon); } this._previousFontIconClass = this.fontIcon; } } /** * Cleans up a value to be used as a fontIcon or fontSet. * Since the value ends up being assigned as a CSS class, we * have to trim the value and omit space-separated values. */ _cleanupFontValue(value) { return typeof value === 'string' ? value.trim().split(' ')[0] : value; } /** * Prepends the current path to all elements that have an attribute pointing to a `FuncIRI` * reference. This is required because WebKit browsers require references to be prefixed with * the current path, if the page has a `base` tag. */ _prependPathToReferences(path) { const elements = this._elementsWithExternalReferences; if (elements) { elements.forEach((attrs, element) => { attrs.forEach(attr => { element.setAttribute(attr.name, `url('${path}#${attr.value}')`); }); }); } } /** * Caches the children of an SVG element that have `url()` * references that we need to prefix with the current path. */ _cacheChildrenWithExternalReferences(element) { const elementsWithFuncIri = element.querySelectorAll(funcIriAttributeSelector); const elements = (this._elementsWithExternalReferences = this._elementsWithExternalReferences || new Map()); for (let i = 0; i < elementsWithFuncIri.length; i++) { funcIriAttributes.forEach(attr => { const elementWithReference = elementsWithFuncIri[i]; const value = elementWithReference.getAttribute(attr); const match = value ? value.match(funcIriPattern) : null; if (match) { let attributes = elements.get(elementWithReference); if (!attributes) { attributes = []; elements.set(elementWithReference, attributes); } attributes.push({ name: attr, value: match[1] }); } }); } } /** Sets a new SVG icon with a particular name. */ _updateSvgIcon(rawName) { this._svgNamespace = null; this._svgName = null; this._currentIconFetch.unsubscribe(); if (rawName) { const [namespace, iconName] = this._splitIconName(rawName); if (namespace) { this._svgNamespace = namespace; } if (iconName) { this._svgName = iconName; } this._currentIconFetch = this._iconRegistry .getNamedSvgIcon(iconName, namespace) .pipe(take(1)) .subscribe(svg => this._setSvgElement(svg), (err) => { const errorMessage = `Error retrieving icon ${namespace}:${iconName}! ${err.message}`; this._errorHandler.handleError(new Error(errorMessage)); }); } } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.0-next.2", ngImport: i0, type: MatIcon, deps: [{ token: i0.ElementRef }, { token: i1.MatIconRegistry }, { token: 'aria-hidden', attribute: true }, { token: MAT_ICON_LOCATION }, { token: i0.ErrorHandler }, { token: MAT_ICON_DEFAULT_OPTIONS, optional: true }], target: i0.ɵɵFactoryTarget.Component }); } static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "16.1.0", version: "18.2.0-next.2", type: MatIcon, isStandalone: true, selector: "mat-icon", inputs: { color: "color", inline: ["inline", "inline", booleanAttribute], svgIcon: "svgIcon", fontSet: "fontSet", fontIcon: "fontIcon" }, host: { attributes: { "role": "img" }, properties: { "class": "color ? \"mat-\" + color : \"\"", "attr.data-mat-icon-type": "_usingFontIcon() ? \"font\" : \"svg\"", "attr.data-mat-icon-name": "_svgName || fontIcon", "attr.data-mat-icon-namespace": "_svgNamespace || fontSet", "attr.fontIcon": "_usingFontIcon() ? fontIcon : null", "class.mat-icon-inline": "inline", "class.mat-icon-no-color": "color !== \"primary\" && color !== \"accent\" && color !== \"warn\"" }, classAttribute: "mat-icon notranslate" }, exportAs: ["matIcon"], ngImport: i0, template: '<ng-content></ng-content>', isInline: true, styles: ["mat-icon,mat-icon.mat-primary,mat-icon.mat-accent,mat-icon.mat-warn{color:var(--mat-icon-color)}.mat-icon{-webkit-user-select:none;user-select:none;background-repeat:no-repeat;display:inline-block;fill:currentColor;height:24px;width:24px;overflow:hidden}.mat-icon.mat-icon-inline{font-size:inherit;height:inherit;line-height:inherit;width:inherit}.mat-icon.mat-ligature-font[fontIcon]::before{content:attr(fontIcon)}[dir=rtl] .mat-icon-rtl-mirror{transform:scale(-1, 1)}.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-prefix .mat-icon,.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-suffix .mat-icon{display:block}.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-prefix .mat-icon-button .mat-icon,.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-suffix .mat-icon-button .mat-icon{margin:auto}"], changeDetection: i0.ChangeDetectionStrategy.OnPush, encapsulation: i0.ViewEncapsulation.None }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.0-next.2", ngImport: i0, type: MatIcon, decorators: [{ type: Component, args: [{ template: '<ng-content></ng-content>', selector: 'mat-icon', exportAs: 'matIcon', host: { 'role': 'img', 'class': 'mat-icon notranslate', '[class]': 'color ? "mat-" + color : ""', '[attr.data-mat-icon-type]': '_usingFontIcon() ? "font" : "svg"', '[attr.data-mat-icon-name]': '_svgName || fontIcon', '[attr.data-mat-icon-namespace]': '_svgNamespace || fontSet', '[attr.fontIcon]': '_usingFontIcon() ? fontIcon : null', '[class.mat-icon-inline]': 'inline', '[class.mat-icon-no-color]': 'color !== "primary" && color !== "accent" && color !== "warn"', }, encapsulation: ViewEncapsulation.None, changeDetection: ChangeDetectionStrategy.OnPush, standalone: true, styles: ["mat-icon,mat-icon.mat-primary,mat-icon.mat-accent,mat-icon.mat-warn{color:var(--mat-icon-color)}.mat-icon{-webkit-user-select:none;user-select:none;background-repeat:no-repeat;display:inline-block;fill:currentColor;height:24px;width:24px;overflow:hidden}.mat-icon.mat-icon-inline{font-size:inherit;height:inherit;line-height:inherit;width:inherit}.mat-icon.mat-ligature-font[fontIcon]::before{content:attr(fontIcon)}[dir=rtl] .mat-icon-rtl-mirror{transform:scale(-1, 1)}.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-prefix .mat-icon,.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-suffix .mat-icon{display:block}.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-prefix .mat-icon-button .mat-icon,.mat-form-field:not(.mat-form-field-appearance-legacy) .mat-form-field-suffix .mat-icon-button .mat-icon{margin:auto}"] }] }], ctorParameters: () => [{ type: i0.ElementRef }, { type: i1.MatIconRegistry }, { type: undefined, decorators: [{ type: Attribute, args: ['aria-hidden'] }] }, { type: undefined, decorators: [{ type: Inject, args: [MAT_ICON_LOCATION] }] }, { type: i0.ErrorHandler }, { type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_ICON_DEFAULT_OPTIONS] }] }], propDecorators: { color: [{ type: Input }], inline: [{ type: Input, args: [{ transform: booleanAttribute }] }], svgIcon: [{ type: Input }], fontSet: [{ type: Input }], fontIcon: [{ type: Input }] } }); //# 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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 {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewChecked,\n  Attribute,\n  booleanAttribute,\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  ErrorHandler,\n  inject,\n  Inject,\n  InjectionToken,\n  Input,\n  OnDestroy,\n  OnInit,\n  Optional,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {ThemePalette} from '@angular/material/core';\nimport {Subscription} from 'rxjs';\nimport {take} from 'rxjs/operators';\n\nimport {MatIconRegistry} from './icon-registry';\n\n/** Default options for `mat-icon`.  */\nexport interface MatIconDefaultOptions {\n  /**\n   * Theme color of the icon. This API is supported in M2 themes only, it\n   * has no effect in M3 themes.\n   *\n   * For information on applying color variants in M3, see\n   * https://material.angular.io/guide/theming#using-component-color-variants.\n   */\n  color?: ThemePalette;\n  /** Font set that the icon is a part of. */\n  fontSet?: string;\n}\n\n/** Injection token to be used to override the default options for `mat-icon`. */\nexport const MAT_ICON_DEFAULT_OPTIONS = new InjectionToken<MatIconDefaultOptions>(\n  'MAT_ICON_DEFAULT_OPTIONS',\n);\n\n/**\n * Injection token used to provide the current location to `MatIcon`.\n * Used to handle server-side rendering and to stub out during unit tests.\n * @docs-private\n */\nexport const MAT_ICON_LOCATION = new InjectionToken<MatIconLocation>('mat-icon-location', {\n  providedIn: 'root',\n  factory: MAT_ICON_LOCATION_FACTORY,\n});\n\n/**\n * Stubbed out location for `MatIcon`.\n * @docs-private\n */\nexport interface MatIconLocation {\n  getPathname: () => string;\n}\n\n/** @docs-private */\nexport function MAT_ICON_LOCATION_FACTORY(): MatIconLocation {\n  const _document = inject(DOCUMENT);\n  const _location = _document ? _document.location : null;\n\n  return {\n    // Note that this needs to be a function, rather than a property, because Angular\n    // will only resolve it once, but we want the current path on each call.\n    getPathname: () => (_location ? _location.pathname + _location.search : ''),\n  };\n}\n\n/** SVG attributes that accept a FuncIRI (e.g. `url(<something>)`). */\nconst funcIriAttributes = [\n  'clip-path',\n  'color-profile',\n  'src',\n  'cursor',\n  'fill',\n  'filter',\n  'marker',\n  'marker-start',\n  'marker-mid',\n  'marker-end',\n  'mask',\n  'stroke',\n];\n\n/** Selector that can be used to find all elements that are using a `FuncIRI`. */\nconst funcIriAttributeSelector = funcIriAttributes.map(attr => `[${attr}]`).join(', ');\n\n/** Regex that can be used to extract the id out of a FuncIRI. */\nconst funcIriPattern = /^url\\(['\"]?#(.*?)['\"]?\\)$/;\n\n/**\n * Component to display an icon. It can be used in the following ways:\n *\n * - Specify the svgIcon input to load an SVG icon from a URL previously registered with the\n *   addSvgIcon, addSvgIconInNamespace, addSvgIconSet, or addSvgIconSetInNamespace methods of\n *   MatIconRegistry. If the svgIcon value contains a colon it is assumed to be in the format\n *   \"[namespace]:[name]\", if not the value will be the name of an icon in the default namespace.\n *   Examples:\n *     `<mat-icon svgIcon=\"left-arrow\"></mat-icon>\n *     <mat-icon svgIcon=\"animals:cat\"></mat-icon>`\n *\n * - Use a font ligature as an icon by putting the ligature text in the `fontIcon` attribute or the\n *   content of the `<mat-icon>` component. If you register a custom font class, don't forget to also\n *   include the special class `mat-ligature-font`. It is recommended to use the attribute alternative\n *   to prevent the ligature text to be selectable and to appear in search engine results.\n *   By default, the Material icons font is used as described at\n *   http://google.github.io/material-design-icons/#icon-font-for-the-web. You can specify an\n *   alternate font by setting the fontSet input to either the CSS class to apply to use the\n *   desired font, or to an alias previously registered with MatIconRegistry.registerFontClassAlias.\n *   Examples:\n *     `<mat-icon fontIcon=\"home\"></mat-icon>\n *     <mat-icon>home</mat-icon>\n *     <mat-icon fontSet=\"myfont\" fontIcon=\"sun\"></mat-icon>\n *     <mat-icon fontSet=\"myfont\">sun</mat-icon>`\n *\n * - Specify a font glyph to be included via CSS rules by setting the fontSet input to specify the\n *   font, and the fontIcon input to specify the icon. Typically the fontIcon will specify a\n *   CSS class which causes the glyph to be displayed via a :before selector, as in\n *   https://fortawesome.github.io/Font-Awesome/examples/\n *   Example:\n *     `<mat-icon fontSet=\"fa\" fontIcon=\"alarm\"></mat-icon>`\n */\n@Component({\n  template: '<ng-content></ng-content>',\n  selector: 'mat-icon',\n  exportAs: 'matIcon',\n  styleUrl: 'icon.css',\n  host: {\n    'role': 'img',\n    'class': 'mat-icon notranslate',\n    '[class]': 'color ? \"mat-\" + color : \"\"',\n    '[attr.data-mat-icon-type]': '_usingFontIcon() ? \"font\" : \"svg\"',\n    '[attr.data-mat-icon-name]': '_svgName || fontIcon',\n    '[attr.data-mat-icon-namespace]': '_svgNamespace || fontSet',\n    '[attr.fontIcon]': '_usingFontIcon() ? fontIcon : null',\n    '[class.mat-icon-inline]': 'inline',\n    '[class.mat-icon-no-color]': 'color !== \"primary\" && color !== \"accent\" && color !== \"warn\"',\n  },\n  encapsulation: ViewEncapsulation.None,\n  changeDetection: ChangeDetectionStrategy.OnPush,\n  standalone: true,\n})\nexport class MatIcon implements OnInit, AfterViewChecked, OnDestroy {\n  private _defaultColor: ThemePalette;\n\n  /**\n   * Theme color of the icon. This API is supported in M2 themes only, it\n   * has no effect in M3 themes.\n   *\n   * For information on applying color variants in M3, see\n   * https://material.angular.io/guide/theming#using-component-color-variants.\n   */\n  @Input()\n  get color() {\n    return this._color || this._defaultColor;\n  }\n  set color(value: string | null | undefined) {\n    this._color = value;\n  }\n  private _color: string | null | undefined;\n\n  /**\n   * Whether the icon should be inlined, automatically sizing the icon to match the font size of\n   * the element the icon is contained in.\n   */\n  @Input({transform: booleanAttribute})\n  inline: boolean = false;\n\n  /** Name of the icon in the SVG icon set. */\n  @Input()\n  get svgIcon(): string {\n    return this._svgIcon;\n  }\n  set svgIcon(value: string) {\n    if (value !== this._svgIcon) {\n      if (value) {\n        this._updateSvgIcon(value);\n      } else if (this._svgIcon) {\n        this._clearSvgElement();\n      }\n      this._svgIcon = value;\n    }\n  }\n  private _svgIcon: string;\n\n  /** Font set that the icon is a part of. */\n  @Input()\n  get fontSet(): string {\n    return this._fontSet;\n  }\n  set fontSet(value: string) {\n    const newValue = this._cleanupFontValue(value);\n\n    if (newValue !== this._fontSet) {\n      this._fontSet = newValue;\n      this._updateFontIconClasses();\n    }\n  }\n  private _fontSet: string;\n\n  /** Name of an icon within a font set. */\n  @Input()\n  get fontIcon(): string {\n    return this._fontIcon;\n  }\n  set fontIcon(value: string) {\n    const newValue = this._cleanupFontValue(value);\n\n    if (newValue !== this._fontIcon) {\n      this._fontIcon = newValue;\n      this._updateFontIconClasses();\n    }\n  }\n  private _fontIcon: string;\n\n  private _previousFontSetClass: string[] = [];\n  private _previousFontIconClass: string;\n\n  _svgName: string | null;\n  _svgNamespace: string | null;\n\n  /** Keeps track of the current page path. */\n  private _previousPath?: string;\n\n  /** Keeps track of the elements and attributes that we've prefixed with the current path. */\n  private _elementsWithExternalReferences?: Map<Element, {name: string; value: string}[]>;\n\n  /** Subscription to the current in-progress SVG icon request. */\n  private _currentIconFetch = Subscription.EMPTY;\n\n  constructor(\n    readonly _elementRef: ElementRef<HTMLElement>,\n    private _iconRegistry: MatIconRegistry,\n    @Attribute('aria-hidden') ariaHidden: string,\n    @Inject(MAT_ICON_LOCATION) private _location: MatIconLocation,\n    private readonly _errorHandler: ErrorHandler,\n    @Optional()\n    @Inject(MAT_ICON_DEFAULT_OPTIONS)\n    defaults?: MatIconDefaultOptions,\n  ) {\n    if (defaults) {\n      if (defaults.color) {\n        this.color = this._defaultColor = defaults.color;\n      }\n\n      if (defaults.fontSet) {\n        this.fontSet = defaults.fontSet;\n      }\n    }\n\n    // If the user has not explicitly set aria-hidden, mark the icon as hidden, as this is\n    // the right thing to do for the majority of icon use-cases.\n    if (!ariaHidden) {\n      _elementRef.nativeElement.setAttribute('aria-hidden', 'true');\n    }\n  }\n\n  /**\n   * Splits an svgIcon binding value into its icon set and icon name components.\n   * Returns a 2-element array of [(icon set), (icon name)].\n   * The separator for the two fields is ':'. If there is no separator, an empty\n   * string is returned for the icon set and the entire value is returned for\n   * the icon name. If the argument is falsy, returns an array of two empty strings.\n   * Throws an error if the name contains two or more ':' separators.\n   * Examples:\n   *   `'social:cake' -> ['social', 'cake']\n   *   'penguin' -> ['', 'penguin']\n   *   null -> ['', '']\n   *   'a:b:c' -> (throws Error)`\n   */\n  private _splitIconName(iconName: string): [string, string] {\n    if (!iconName) {\n      return ['', ''];\n    }\n    const parts = iconName.split(':');\n    switch (parts.length) {\n      case 1:\n        return ['', parts[0]]; // Use default namespace.\n      case 2:\n        return <[string, string]>parts;\n      default:\n        throw Error(`Invalid icon name: \"${iconName}\"`); // TODO: add an ngDevMode check\n    }\n  }\n\n  ngOnInit() {\n    // Update font classes because ngOnChanges won't be called if none of the inputs are present,\n    // e.g. <mat-icon>arrow</mat-icon> In this case we need to add a CSS class for the default font.\n    this._updateFontIconClasses();\n  }\n\n  ngAfterViewChecked() {\n    const cachedElements = this._elementsWithExternalReferences;\n\n    if (cachedElements && cachedElements.size) {\n      const newPath = this._location.getPathname();\n\n      // We need to check whether the URL has changed on each change detection since\n      // the browser doesn't have an API that will let us react on link clicks and\n      // we can't depend on the Angular router. The references need to be updated,\n      // because while most browsers don't care whether the URL is correct after\n      // the first render, Safari will break if the user navigates to a different\n      // page and the SVG isn't re-rendered.\n      if (newPath !== this._previousPath) {\n        this._previousPath = newPath;\n        this._prependPathToReferences(newPath);\n      }\n    }\n  }\n\n  ngOnDestroy() {\n    this._currentIconFetch.unsubscribe();\n\n    if (this._elementsWithExternalReferences) {\n      this._elementsWithExternalReferences.clear();\n    }\n  }\n\n  _usingFontIcon(): boolean {\n    return !this.svgIcon;\n  }\n\n  private _setSvgElement(svg: SVGElement) {\n    this._clearSvgElement();\n\n    // Note: we do this fix here, rather than the icon registry, because the\n    // references have to point to the URL at the time that the icon was created.\n    const path = this._location.getPathname();\n    this._previousPath = path;\n    this._cacheChildrenWithExternalReferences(svg);\n    this._prependPathToReferences(path);\n    this._elementRef.nativeElement.appendChild(svg);\n  }\n\n  private _clearSvgElement() {\n    const layoutElement: HTMLElement = this._elementRef.nativeElement;\n    let childCount = layoutElement.childNodes.length;\n\n    if (this._elementsWithExternalReferences) {\n      this._elementsWithExternalReferences.clear();\n    }\n\n    // Remove existing non-element child nodes and SVGs, and add the new SVG element. Note that\n    // we can't use innerHTML, because IE will throw if the element has a data binding.\n    while (childCount--) {\n      const child = layoutElement.childNodes[childCount];\n\n      // 1 corresponds to Node.ELEMENT_NODE. We remove all non-element nodes in order to get rid\n      // of any loose text nodes, as well as any SVG elements in order to remove any old icons.\n      if (child.nodeType !== 1 || child.nodeName.toLowerCase() === 'svg') {\n        child.remove();\n      }\n    }\n  }\n\n  private _updateFontIconClasses() {\n    if (!this._usingFontIcon()) {\n      return;\n    }\n\n    const elem: HTMLElement = this._elementRef.nativeElement;\n    const fontSetClasses = (\n      this.fontSet\n        ? this._iconRegistry.classNameForFontAlias(this.fontSet).split(/ +/)\n        : this._iconRegistry.getDefaultFontSetClass()\n    ).filter(className => className.length > 0);\n\n    this._previousFontSetClass.forEach(className => elem.classList.remove(className));\n    fontSetClasses.forEach(className => elem.classList.add(className));\n    this._previousFontSetClass = fontSetClasses;\n\n    if (\n      this.fontIcon !== this._previousFontIconClass &&\n      !fontSetClasses.includes('mat-ligature-font')\n    ) {\n      if (this._previousFontIconClass) {\n        elem.classList.remove(this._pr