@angular/material
Version:
Angular Material
375 lines • 48.3 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 { __extends, __read } from "tslib";
import { coerceBooleanProperty } from '@angular/cdk/coercion';
import { DOCUMENT } from '@angular/common';
import { Attribute, ChangeDetectionStrategy, Component, ElementRef, ErrorHandler, inject, Inject, InjectionToken, Input, Optional, ViewEncapsulation, } from '@angular/core';
import { mixinColor } from '@angular/material/core';
import { take } from 'rxjs/operators';
import { MatIconRegistry } from './icon-registry';
// Boilerplate for applying mixins to MatIcon.
/** @docs-private */
var MatIconBase = /** @class */ (function () {
function MatIconBase(_elementRef) {
this._elementRef = _elementRef;
}
return MatIconBase;
}());
var _MatIconMixinBase = mixinColor(MatIconBase);
/**
* 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 var MAT_ICON_LOCATION = new InjectionToken('mat-icon-location', {
providedIn: 'root',
factory: MAT_ICON_LOCATION_FACTORY
});
/** @docs-private */
export function MAT_ICON_LOCATION_FACTORY() {
var _document = inject(DOCUMENT);
var _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: function () { return _location ? (_location.pathname + _location.search) : ''; }
};
}
/** SVG attributes that accept a FuncIRI (e.g. `url(<something>)`). */
var funcIriAttributes = [
'clip-path',
'color-profile',
'src',
'cursor',
'fill',
'filter',
'marker',
'marker-start',
'marker-mid',
'marker-end',
'mask',
'stroke'
];
var ɵ0 = function (attr) { return "[" + attr + "]"; };
/** Selector that can be used to find all elements that are using a `FuncIRI`. */
var funcIriAttributeSelector = funcIriAttributes.map(ɵ0).join(', ');
/** Regex that can be used to extract the id out of a FuncIRI. */
var 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 content of the `<mat-icon>`
* component. 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>home</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>`
*/
var MatIcon = /** @class */ (function (_super) {
__extends(MatIcon, _super);
function MatIcon(elementRef, _iconRegistry, ariaHidden,
/**
* @deprecated `location` parameter to be made required.
* @breaking-change 8.0.0
*/
_location,
// @breaking-change 9.0.0 _errorHandler parameter to be made required
_errorHandler) {
var _this = _super.call(this, elementRef) || this;
_this._iconRegistry = _iconRegistry;
_this._location = _location;
_this._errorHandler = _errorHandler;
_this._inline = false;
// 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');
}
return _this;
}
Object.defineProperty(MatIcon.prototype, "inline", {
/**
* Whether the icon should be inlined, automatically sizing the icon to match the font size of
* the element the icon is contained in.
*/
get: function () {
return this._inline;
},
set: function (inline) {
this._inline = coerceBooleanProperty(inline);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatIcon.prototype, "fontSet", {
/** Font set that the icon is a part of. */
get: function () { return this._fontSet; },
set: function (value) {
this._fontSet = this._cleanupFontValue(value);
},
enumerable: true,
configurable: true
});
Object.defineProperty(MatIcon.prototype, "fontIcon", {
/** Name of an icon within a font set. */
get: function () { return this._fontIcon; },
set: function (value) {
this._fontIcon = this._cleanupFontValue(value);
},
enumerable: true,
configurable: 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)`
*/
MatIcon.prototype._splitIconName = function (iconName) {
if (!iconName) {
return ['', ''];
}
var 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 + "\"");
}
};
MatIcon.prototype.ngOnChanges = function (changes) {
var _this = this;
// Only update the inline SVG icon if the inputs changed, to avoid unnecessary DOM operations.
var svgIconChanges = changes['svgIcon'];
if (svgIconChanges) {
if (this.svgIcon) {
var _a = __read(this._splitIconName(this.svgIcon), 2), namespace_1 = _a[0], iconName_1 = _a[1];
this._iconRegistry.getNamedSvgIcon(iconName_1, namespace_1)
.pipe(take(1))
.subscribe(function (svg) { return _this._setSvgElement(svg); }, function (err) {
var errorMessage = "Error retrieving icon " + namespace_1 + ":" + iconName_1 + "! " + err.message;
// @breaking-change 9.0.0 _errorHandler parameter to be made required.
if (_this._errorHandler) {
_this._errorHandler.handleError(new Error(errorMessage));
}
else {
console.error(errorMessage);
}
});
}
else if (svgIconChanges.previousValue) {
this._clearSvgElement();
}
}
if (this._usingFontIcon()) {
this._updateFontIconClasses();
}
};
MatIcon.prototype.ngOnInit = function () {
// 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.
if (this._usingFontIcon()) {
this._updateFontIconClasses();
}
};
MatIcon.prototype.ngAfterViewChecked = function () {
var cachedElements = this._elementsWithExternalReferences;
if (cachedElements && this._location && cachedElements.size) {
var 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);
}
}
};
MatIcon.prototype.ngOnDestroy = function () {
if (this._elementsWithExternalReferences) {
this._elementsWithExternalReferences.clear();
}
};
MatIcon.prototype._usingFontIcon = function () {
return !this.svgIcon;
};
MatIcon.prototype._setSvgElement = function (svg) {
this._clearSvgElement();
// Workaround for IE11 and Edge ignoring `style` tags inside dynamically-created SVGs.
// See: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10898469/
// Do this before inserting the element into the DOM, in order to avoid a style recalculation.
var styleTags = svg.querySelectorAll('style');
for (var i = 0; i < styleTags.length; i++) {
styleTags[i].textContent += ' ';
}
// 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.
if (this._location) {
var path = this._location.getPathname();
this._previousPath = path;
this._cacheChildrenWithExternalReferences(svg);
this._prependPathToReferences(path);
}
this._elementRef.nativeElement.appendChild(svg);
};
MatIcon.prototype._clearSvgElement = function () {
var layoutElement = this._elementRef.nativeElement;
var 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--) {
var 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') {
layoutElement.removeChild(child);
}
}
};
MatIcon.prototype._updateFontIconClasses = function () {
if (!this._usingFontIcon()) {
return;
}
var elem = this._elementRef.nativeElement;
var fontSetClass = this.fontSet ?
this._iconRegistry.classNameForFontAlias(this.fontSet) :
this._iconRegistry.getDefaultFontSetClass();
if (fontSetClass != this._previousFontSetClass) {
if (this._previousFontSetClass) {
elem.classList.remove(this._previousFontSetClass);
}
if (fontSetClass) {
elem.classList.add(fontSetClass);
}
this._previousFontSetClass = fontSetClass;
}
if (this.fontIcon != this._previousFontIconClass) {
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.
*/
MatIcon.prototype._cleanupFontValue = function (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.
*/
MatIcon.prototype._prependPathToReferences = function (path) {
var elements = this._elementsWithExternalReferences;
if (elements) {
elements.forEach(function (attrs, element) {
attrs.forEach(function (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.
*/
MatIcon.prototype._cacheChildrenWithExternalReferences = function (element) {
var elementsWithFuncIri = element.querySelectorAll(funcIriAttributeSelector);
var elements = this._elementsWithExternalReferences =
this._elementsWithExternalReferences || new Map();
var _loop_1 = function (i) {
funcIriAttributes.forEach(function (attr) {
var elementWithReference = elementsWithFuncIri[i];
var value = elementWithReference.getAttribute(attr);
var match = value ? value.match(funcIriPattern) : null;
if (match) {
var attributes = elements.get(elementWithReference);
if (!attributes) {
attributes = [];
elements.set(elementWithReference, attributes);
}
attributes.push({ name: attr, value: match[1] });
}
});
};
for (var i = 0; i < elementsWithFuncIri.length; i++) {
_loop_1(i);
}
};
MatIcon.decorators = [
{ type: Component, args: [{
template: '<ng-content></ng-content>',
selector: 'mat-icon',
exportAs: 'matIcon',
inputs: ['color'],
host: {
'role': 'img',
'class': 'mat-icon notranslate',
'[class.mat-icon-inline]': 'inline',
'[class.mat-icon-no-color]': 'color !== "primary" && color !== "accent" && color !== "warn"',
},
encapsulation: ViewEncapsulation.None,
changeDetection: ChangeDetectionStrategy.OnPush,
styles: [".mat-icon{background-repeat:no-repeat;display:inline-block;fill:currentColor;height:24px;width:24px}.mat-icon.mat-icon-inline{font-size:inherit;height:inherit;line-height:inherit;width:inherit}[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}\n"]
}] }
];
/** @nocollapse */
MatIcon.ctorParameters = function () { return [
{ type: ElementRef },
{ type: MatIconRegistry },
{ type: String, decorators: [{ type: Attribute, args: ['aria-hidden',] }] },
{ type: undefined, decorators: [{ type: Optional }, { type: Inject, args: [MAT_ICON_LOCATION,] }] },
{ type: ErrorHandler, decorators: [{ type: Optional }] }
]; };
MatIcon.propDecorators = {
inline: [{ type: Input }],
svgIcon: [{ type: Input }],
fontSet: [{ type: Input }],
fontIcon: [{ type: Input }]
};
return MatIcon;
}(_MatIconMixinBase));
export { MatIcon };
export { ɵ0 };
//# 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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 {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';\nimport {DOCUMENT} from '@angular/common';\nimport {\n  AfterViewChecked,\n  Attribute,\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  ErrorHandler,\n  inject,\n  Inject,\n  InjectionToken,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Optional,\n  SimpleChanges,\n  ViewEncapsulation,\n} from '@angular/core';\nimport {CanColor, CanColorCtor, mixinColor} from '@angular/material/core';\nimport {take} from 'rxjs/operators';\n\nimport {MatIconRegistry} from './icon-registry';\n\n\n// Boilerplate for applying mixins to MatIcon.\n/** @docs-private */\nclass MatIconBase {\n  constructor(public _elementRef: ElementRef) {}\n}\nconst _MatIconMixinBase: CanColorCtor & typeof MatIconBase = mixinColor(MatIconBase);\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\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 content of the `<mat-icon>`\n *   component. 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>home</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  styleUrls: ['icon.css'],\n  inputs: ['color'],\n  host: {\n    'role': 'img',\n    'class': 'mat-icon notranslate',\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})\nexport class MatIcon extends _MatIconMixinBase implements OnChanges, OnInit, AfterViewChecked,\n  CanColor, OnDestroy {\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()\n  get inline(): boolean {\n    return this._inline;\n  }\n  set inline(inline: boolean) {\n    this._inline = coerceBooleanProperty(inline);\n  }\n  private _inline: boolean = false;\n\n  /** Name of the icon in the SVG icon set. */\n  @Input() svgIcon: string;\n\n  /** Font set that the icon is a part of. */\n  @Input()\n  get fontSet(): string { return this._fontSet; }\n  set fontSet(value: string) {\n    this._fontSet = this._cleanupFontValue(value);\n  }\n  private _fontSet: string;\n\n  /** Name of an icon within a font set. */\n  @Input()\n  get fontIcon(): string { return this._fontIcon; }\n  set fontIcon(value: string) {\n    this._fontIcon = this._cleanupFontValue(value);\n  }\n  private _fontIcon: string;\n\n  private _previousFontSetClass: string;\n  private _previousFontIconClass: string;\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  constructor(\n      elementRef: ElementRef<HTMLElement>, private _iconRegistry: MatIconRegistry,\n      @Attribute('aria-hidden') ariaHidden: string,\n      /**\n       * @deprecated `location` parameter to be made required.\n       * @breaking-change 8.0.0\n       */\n      @Optional() @Inject(MAT_ICON_LOCATION) private _location?: MatIconLocation,\n      // @breaking-change 9.0.0 _errorHandler parameter to be made required\n      @Optional() private readonly _errorHandler?: ErrorHandler) {\n    super(elementRef);\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: return ['', parts[0]]; // Use default namespace.\n      case 2: return <[string, string]>parts;\n      default: throw Error(`Invalid icon name: \"${iconName}\"`);\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    // Only update the inline SVG icon if the inputs changed, to avoid unnecessary DOM operations.\n    const svgIconChanges = changes['svgIcon'];\n\n    if (svgIconChanges) {\n      if (this.svgIcon) {\n        const [namespace, iconName] = this._splitIconName(this.svgIcon);\n\n        this._iconRegistry.getNamedSvgIcon(iconName, namespace)\n            .pipe(take(1))\n            .subscribe(svg => this._setSvgElement(svg), (err: Error) => {\n              const errorMessage = `Error retrieving icon ${namespace}:${iconName}! ${err.message}`;\n              // @breaking-change 9.0.0 _errorHandler parameter to be made required.\n              if (this._errorHandler) {\n                this._errorHandler.handleError(new Error(errorMessage));\n              } else {\n                console.error(errorMessage);\n              }\n            });\n      } else if (svgIconChanges.previousValue) {\n        this._clearSvgElement();\n      }\n    }\n\n    if (this._usingFontIcon()) {\n      this._updateFontIconClasses();\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    if (this._usingFontIcon()) {\n      this._updateFontIconClasses();\n    }\n  }\n\n  ngAfterViewChecked() {\n    const cachedElements = this._elementsWithExternalReferences;\n\n    if (cachedElements && this._location && 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    if (this._elementsWithExternalReferences) {\n      this._elementsWithExternalReferences.clear();\n    }\n  }\n\n  private _usingFontIcon(): boolean {\n    return !this.svgIcon;\n  }\n\n  private _setSvgElement(svg: SVGElement) {\n    this._clearSvgElement();\n\n    // Workaround for IE11 and Edge ignoring `style` tags inside dynamically-created SVGs.\n    // See: https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10898469/\n    // Do this before inserting the element into the DOM, in order to avoid a style recalculation.\n    const styleTags = svg.querySelectorAll('style') as NodeListOf<HTMLStyleElement>;\n\n    for (let i = 0; i < styleTags.length; i++) {\n      styleTags[i].textContent += ' ';\n    }\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    if (this._location) {\n      const path = this._location.getPathname();\n      this._previousPath = path;\n      this._cacheChildrenWithExternalReferences(svg);\n      this._prependPathToReferences(path);\n    }\n\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        layoutElement.removeChild(child);\n      }\n    }\n  }\n\n  private _updateFontIconClasses() {\n    if (!this._usingFontIcon()) {\n      return;\n    }\n\n    const elem: HTMLElement = this._elementRef.nativeElement;\n    const fontSetClass = this.fontSet ?\n        this._iconRegistry.classNameForFontAlias(this.fontSet) :\n        this._iconRegistry.getDefaultFontSetClass();\n\n    if (fontSetClass != this._previousFontSetClass) {\n      if (this._previousFontSetClass) {\n        elem.classList.remove(this._previousFontSetClass);\n      }\n      if (fontSetClass) {\n        elem.classList.add(fontSetClass);\n      }\n      this._previousFontSetClass = fontSetClass;\n    }\n\n    if (this.fontIcon != this._previousFontIconClass) {\n      if (this._previousFontIconClass) {\n        elem.classList.remove(this._previousFontIconClass);\n      }\n      if (this.fontIcon) {\n        elem.classList.add(this.fontIcon);\n      }\n      this._previousFontIconClass = this.fontIcon;\n    }\n  }\n\n  /**\n   * Cleans up a value to be used as a fontIcon or fontSet.\n   * Since the value ends up being assigned as a CSS class, we\n   * have to trim the value and omit space-separated values.\n   */\n  private _cleanupFontValue(value: string) {\n    return typeof value === 'string' ? value.trim().split(' ')[0] : value;\n  }\n\n  /**\n   * Prepends the current path to all elements that have an attribute pointing to a `FuncIRI`\n   * reference. This is required because WebKit browsers require references to be prefixed with\n   * the current path, if the page has a `base` tag.\n   */\n  private _prependPathToReferences(path: string) {\n    const elements = this._elementsWithExternalReferences;\n\n    if (elements) {\n      elements.forEach((attrs, element) => {\n        attrs.forEach(attr => {\n          element.setAttribute(attr.name, `url('${path}#${attr.value}')`);\n        });\n      });\n    }\n  }\n\n  /**\n   * Caches the children of an SVG element that have `url()`\n   * references that we need to prefix with the current path.\n   */\n  private _cacheChildrenWithExternalReferences(element: SVGElement) {\n    const elementsWithFuncIri = element.querySelectorAll(funcIriAttributeSelector);\n    const elements = this._elementsWithExternalReferences =\n        this._elementsWithExternalReferences || new Map();\n\n    for (let i = 0; i < elementsWithFuncIri.length; i++) {\n      funcIriAttributes.forEach(attr => {\n        const elementWithReference = elementsWithFuncIri[i];\n        const value = elementWithReference.getAttribute(attr);\n        const match = value ? value.match(funcIriPattern) : null;\n\n        if (match) {\n          let attributes = elements.get(elementWithReference);\n\n          if (!attributes) {\n            attributes = [];\n            elements.set(elementWithReference, attributes);\n          }\n\n          attributes!.push({name: attr, value: match[1]});\n        }\n      });\n    }\n  }\n\n  static ngAcceptInputType_inline: BooleanInput;\n}\n"]}