75 lines
2.0 KiB
JavaScript
75 lines
2.0 KiB
JavaScript
let KEYBINDING_MODIFIER_KEYS = ['Shift', 'Meta', 'Alt', 'Control'];
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let PLATFORM = typeof navigator === 'object' ? navigator.platform : '';
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let APPLE_DEVICE = /Mac|iPod|iPhone|iPad/.test(PLATFORM);
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let MOD = APPLE_DEVICE ? 'Meta' : 'Control';
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let ALT_GRAPH_ALIASES =
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// eslint-disable-next-line no-nested-ternary
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PLATFORM === 'Win32' ? ['Control', 'Alt'] : APPLE_DEVICE ? ['Alt'] : [];
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function getModifierState(event, mod) {
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return typeof event.getModifierState === 'function'
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? event.getModifierState(mod) ||
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(ALT_GRAPH_ALIASES.includes(mod) && event.getModifierState('AltGraph'))
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: false;
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}
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export function parseKeybinding(str) {
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return str
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.trim()
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.split(' ')
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.map(press => {
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let mods = press.split(/\b\+/);
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let key = mods.pop();
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mods = mods.map(mod => (mod === '$mod' ? MOD : mod));
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return [mods, key];
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});
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}
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function match(event, press) {
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const [mods, key] = press;
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// Check if the pressed key matches the expected key
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if (key.toUpperCase() !== event.key.toUpperCase() && key !== event.code) {
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return false;
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}
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// Check if all required modifiers are pressed
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if (mods.some(mod => !getModifierState(event, mod))) {
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return false;
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}
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// Check if any unexpected modifiers are pressed
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if (
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KEYBINDING_MODIFIER_KEYS.some(
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mod => !mods.includes(mod) && key !== mod && getModifierState(event, mod)
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)
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) {
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return false;
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}
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return true;
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}
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export function createKeybindingsHandler(keyBindingMap) {
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let keyBindings = Object.keys(keyBindingMap).map(key => {
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return [parseKeybinding(key), keyBindingMap[key]];
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});
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return event => {
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if (!(event instanceof KeyboardEvent)) {
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return;
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}
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// eslint-disable-next-line no-console
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console.log(event.key, event.code, event.getModifierState('Control'));
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keyBindings.forEach(([key, callback]) => {
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let expectedPress = parseKeybinding(key);
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if (match(event, expectedPress)) {
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callback(event);
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}
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});
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};
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}
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