76 lines
2.3 KiB
TypeScript
76 lines
2.3 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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// those are the modifiers that Anki works with
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export type Modifier = "Control" | "Alt" | "Shift" | "Meta";
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const allModifiers: Modifier[] = ["Control", "Alt", "Shift", "Meta"];
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const platformModifiers: string[] = isApplePlatform()
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? ["Meta", "Alt", "Shift", "Control"]
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: ["Control", "Alt", "Shift", "OS"];
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function translateModifierToPlatform(modifier: Modifier): string {
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return platformModifiers[allModifiers.indexOf(modifier)];
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}
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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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const modifierPressed =
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(modifier: Modifier) =>
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(event: MouseEvent | KeyboardEvent): boolean => {
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const translated = translateModifierToPlatform(modifier);
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const state = event.getModifierState(translated);
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return event.type === "keyup"
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? state && (event as KeyboardEvent).key !== translated
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: state;
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};
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export const controlPressed = modifierPressed("Control");
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export const shiftPressed = modifierPressed("Shift");
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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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export function keyToPlatformString(key: string): string {
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switch (key) {
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case "Backspace":
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return "⌫";
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case "Delete":
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return "⌦";
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case "Escape":
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return "⎋";
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default:
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return key;
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}
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}
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