58 lines
1.7 KiB
TypeScript
58 lines
1.7 KiB
TypeScript
const systemModifiers = ['ctrl', 'shift', 'alt', 'meta']
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type KeyedEvent = KeyboardEvent | MouseEvent | TouchEvent;
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const modifierGuards: Record<
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string,
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(e: Event, modifiers?: string[]) => void | boolean
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> = {
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stop: e => e.stopPropagation(),
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prevent: e => e.preventDefault(),
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self: e => e.target !== e.currentTarget,
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ctrl: e => !(e as KeyedEvent).ctrlKey,
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shift: e => !(e as KeyedEvent).shiftKey,
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alt: e => !(e as KeyedEvent).altKey,
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meta: e => !(e as KeyedEvent).metaKey,
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left: e => 'button' in e && (e as MouseEvent).button !== 0,
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middle: e => 'button' in e && (e as MouseEvent).button !== 1,
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right: e => 'button' in e && (e as MouseEvent).button !== 2,
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exact: (e, modifiers: string[]) =>
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systemModifiers.some(m => (e as any)[`${m}Key`] && !modifiers.includes(m))
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}
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export const vOnModifiersGuard = (fn: Function, modifiers: string[]) => {
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return (event: Event) => {
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for (let i = 0; i < modifiers.length; i++) {
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const guard = modifierGuards[modifiers[i]]
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if (guard && guard(event, modifiers)) return
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}
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return fn(event)
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}
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}
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// Kept for 2.x compat.
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// Note: IE11 compat for `spacebar` and `del` is removed for now.
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const keyNames: Record<string, string | string[]> = {
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esc: 'escape',
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space: ' ',
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up: 'arrowup',
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left: 'arrowleft',
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right: 'arrowright',
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down: 'arrowdown',
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delete: 'backspace'
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}
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export const vOnKeysGuard = (fn: Function, modifiers: string[]) => {
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return (event: KeyboardEvent) => {
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if (!('key' in event)) return
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const eventKey = event.key.toLowerCase()
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if (
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// None of the provided key modifiers match the current event key
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!modifiers.some(k => k === eventKey || keyNames[k] === eventKey)
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) {
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return
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}
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return fn(event)
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}
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}
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