57 lines
1.8 KiB
TypeScript
57 lines
1.8 KiB
TypeScript
// Copyright: Ankitects Pty Ltd and contributors
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// License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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import * as tr from "./i18n";
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import { isApplePlatform } from "./platform";
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export type Modifier = "Control" | "Alt" | "Shift" | "Meta";
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// how modifiers are mapped
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const allModifiers: Modifier[] = ["Control", "Alt", "Shift", "Meta"];
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const platformModifiers = isApplePlatform()
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? ["Meta", "Alt", "Shift", "Control"]
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: ["Control", "Alt", "Shift", "OS"];
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export const checkModifiers =
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(required: Modifier[], optional: Modifier[] = []) =>
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(event: KeyboardEvent): boolean => {
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return allModifiers.reduce(
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(
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matches: boolean,
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currentModifier: Modifier,
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currentIndex: number
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): boolean =>
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matches &&
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(optional.includes(currentModifier as Modifier) ||
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event.getModifierState(platformModifiers[currentIndex]) ===
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required.includes(currentModifier)),
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true
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);
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};
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export const hasModifier = (modifier: Modifier) => (event: KeyboardEvent): boolean => event.getModifierState(platformModifiers[allModifiers.indexOf(modifier)]);
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export function isControl(key: string): boolean {
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return key === platformModifiers[0];
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}
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export function isShift(key: string): boolean {
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return key === platformModifiers[2];
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}
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export function modifiersToPlatformString(modifiers: string[]): string {
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const displayModifiers = isApplePlatform()
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? ["^", "⌥", "⇧", "⌘"]
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: [`${tr.keyboardCtrl()}+`, "Alt+", `${tr.keyboardShift()}+`, "Win+"];
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let result = "";
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for (const modifier of modifiers) {
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result += displayModifiers[platformModifiers.indexOf(modifier)];
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}
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return result;
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}
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