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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