import { BooleanInput } from '@angular/cdk/coercion';
import { AfterViewChecked, ElementRef, ErrorHandler, InjectionToken, OnChanges, OnDestroy, OnInit, SimpleChanges } from '@angular/core';
import { SbbIconRegistry } from './icon-registry';
/**
 * Injection token used to provide the current location to `SbbIcon`.
 * Used to handle server-side rendering and to stub out during unit tests.
 * @docs-private
 */
export declare const SBB_ICON_LOCATION: InjectionToken<SbbIconLocation>;
/**
 * Stubbed out location for `SbbIcon`.
 * @docs-private
 */
export interface SbbIconLocation {
    getPathname: () => string;
}
/** @docs-private */
export declare function SBB_ICON_LOCATION_FACTORY(): SbbIconLocation;
/**
 * 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
 *   SbbIconRegistry. 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:
 *     `<sbb-icon svgIcon="example"></sbb-icon>
 *     <sbb-icon svgIcon="kom:cloud-ice-medium"></sbb-icon>`
 *
 * - Use a font ligature as an icon by putting the ligature text in the content of the `<sbb-icon>`
 *   component. You can specify a 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
 *   SbbIconRegistry.registerFontClassAlias.
 *   Examples:
 *     `<sbb-icon>home</sbb-icon>
 *     <sbb-icon fontSet="myfont">sun</sbb-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:
 *     `<sbb-icon fontSet="fa" fontIcon="alarm"></sbb-icon>`
 */
export declare class SbbIcon implements OnChanges, OnInit, AfterViewChecked, OnDestroy {
    private _elementRef;
    private _iconRegistry;
    private _location;
    private readonly _errorHandler;
    /**
     * Whether the icon should be inlined, automatically sizing the icon to match the font size of
     * the element the icon is contained in.
     */
    get inline(): boolean;
    set inline(inline: boolean);
    private _inline;
    /** Name of the icon in the SVG icon set. */
    svgIcon: string;
    /** Font set that the icon is a part of. */
    get fontSet(): string;
    set fontSet(value: string);
    private _fontSet;
    /** Name of an icon within a font set. */
    get fontIcon(): string;
    set fontIcon(value: string);
    private _fontIcon;
    private _previousFontSetClass;
    private _previousFontIconClass;
    /** Keeps track of the current page path. */
    private _previousPath?;
    /** Keeps track of the elements and attributes that we've prefixed with the current path. */
    private _elementsWithExternalReferences?;
    /** Subscription to the current in-progress SVG icon request. */
    private _currentIconFetch;
    constructor(_elementRef: ElementRef<HTMLElement>, _iconRegistry: SbbIconRegistry, ariaHidden: string, _location: SbbIconLocation, _errorHandler: ErrorHandler);
    /**
     * 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:
     *   `'kom:cloud-ice-medium' -> ['kom', 'cloud-ice-medium']
     *   'custom-icon' -> ['', 'custom-icon']
     *   null -> ['', '']
     *   'a:b:c' -> (throws Error)`
     */
    private _splitIconName;
    ngOnChanges(changes: SimpleChanges): void;
    ngOnInit(): void;
    ngAfterViewChecked(): void;
    ngOnDestroy(): void;
    private _usingFontIcon;
    private _setSvgElement;
    private _clearSvgElement;
    private _updateFontIconClasses;
    /**
     * 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.
     */
    private _cleanupFontValue;
    /**
     * 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.
     */
    private _prependPathToReferences;
    /**
     * Caches the children of an SVG element that have `url()`
     * references that we need to prefix with the current path.
     */
    private _cacheChildrenWithExternalReferences;
    static ngAcceptInputType_inline: BooleanInput;
}