import { OnDestroy, TemplateRef, ViewContainerRef } from '@angular/core';
import { ScreenContext } from './screen-context';
import * as i0 from "@angular/core";
/** Spanning mode conditions for use with {@link IfSpanDirective}. */
export declare type SpanCondition = 'dual-horizontal' | 'dual-vertical' | 'none' | 'multi';
/**
 * Enumeration of spanning mode conditions values for use with
 * {@link IfSpanDirective}.
 */
export declare const SpanCondition: {
    /** Screen spanning mode is dual horizontal viewports. */
    Vertical: SpanCondition;
    /** Screen spanning mode is dual vertical viewports. */
    Horizontal: SpanCondition;
    /** No screen spanning (single screen mode). */
    None: SpanCondition;
    /** Any screen spanning mode is active (multi screen mode). */
    Multi: SpanCondition;
};
/**
 * Shows template only if the current screen spanning mode matches
 * specified {@link SpanCondition}.
 *
 * Behaves like `ngIf`, except that it accepts a {@link SpanCondition} instead of
 * a boolean expression.
 *
 * @example
 * <p *fdIdSpan="'multi'">This text will only be visible on multi screen devices.</p>
 * @example
 * <p *fdIdSpan="'none'; else alt">This text will only be visible on single screen devices.</p>
 * <ng-template #alt">This text will only be visible on multi screen devices.</ng-template>
 */
export declare class IfSpanDirective<T> implements OnDestroy {
    private screenContext;
    private viewContainer;
    private screenContextSubscription;
    private condition;
    private thenTemplateRef;
    private elseTemplateRef;
    private thenViewRef;
    private elseViewRef;
    /**
     * The spanning mode condition that defines if the template should be shown.
     *
     * @param condition The spanning mode condition for showing the template.
     */
    set fdIfSpan(condition: SpanCondition);
    /** A template to show if the span condition evaluates to true. */
    set fdIfSpanThen(templateRef: TemplateRef<T> | null);
    /** A template to show if the span condition evaluates to false. */
    set fdIfSpanElse(templateRef: TemplateRef<T> | null);
    constructor(screenContext: ScreenContext, viewContainer: ViewContainerRef, templateRef: TemplateRef<T>);
    /** ignore */
    ngOnDestroy(): void;
    private matchCondition;
    private updateView;
    static ɵfac: i0.ɵɵFactoryDeclaration<IfSpanDirective<any>, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<IfSpanDirective<any>, "[fdIfSpan]", never, { "fdIfSpan": "fdIfSpan"; "fdIfSpanThen": "fdIfSpanThen"; "fdIfSpanElse": "fdIfSpanElse"; }, {}, never, never, false, never>;
}