| 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import { Platform } from '@angular/cdk/platform';
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| 9 | /** Set of possible high-contrast mode backgrounds. */
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| 10 | import * as ɵngcc0 from '@angular/core';
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| 11 | export declare const enum HighContrastMode {
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| 12 | NONE = 0,
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| 13 | BLACK_ON_WHITE = 1,
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| 14 | WHITE_ON_BLACK = 2
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| 15 | }
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| 16 | /** CSS class applied to the document body when in black-on-white high-contrast mode. */
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| 17 | export declare const BLACK_ON_WHITE_CSS_CLASS = "cdk-high-contrast-black-on-white";
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| 18 | /** CSS class applied to the document body when in white-on-black high-contrast mode. */
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| 19 | export declare const WHITE_ON_BLACK_CSS_CLASS = "cdk-high-contrast-white-on-black";
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| 20 | /** CSS class applied to the document body when in high-contrast mode. */
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| 21 | export declare const HIGH_CONTRAST_MODE_ACTIVE_CSS_CLASS = "cdk-high-contrast-active";
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| 22 | /**
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| 23 | * Service to determine whether the browser is currently in a high-contrast-mode environment.
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| 24 | *
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| 25 | * Microsoft Windows supports an accessibility feature called "High Contrast Mode". This mode
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| 26 | * changes the appearance of all applications, including web applications, to dramatically increase
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| 27 | * contrast.
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| 28 | *
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| 29 | * IE, Edge, and Firefox currently support this mode. Chrome does not support Windows High Contrast
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| 30 | * Mode. This service does not detect high-contrast mode as added by the Chrome "High Contrast"
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| 31 | * browser extension.
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| 32 | */
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| 33 | export declare class HighContrastModeDetector {
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| 34 | private _platform;
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| 35 | /**
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| 36 | * Figuring out the high contrast mode and adding the body classes can cause
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| 37 | * some expensive layouts. This flag is used to ensure that we only do it once.
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| 38 | */
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| 39 | private _hasCheckedHighContrastMode;
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| 40 | private _document;
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| 41 | constructor(_platform: Platform, document: any);
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| 42 | /** Gets the current high-contrast-mode for the page. */
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| 43 | getHighContrastMode(): HighContrastMode;
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| 44 | /** Applies CSS classes indicating high-contrast mode to document body (browser-only). */
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| 45 | _applyBodyHighContrastModeCssClasses(): void;
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| 46 | static ɵfac: ɵngcc0.ɵɵFactoryDeclaration<HighContrastModeDetector, never>;
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| 47 | }
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| 48 |
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| 49 | //# sourceMappingURL=high-contrast-mode-detector.d.ts.map |
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