79 lines
1.5 KiB
TypeScript
79 lines
1.5 KiB
TypeScript
type WindowRevealTarget = {
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isDestroyed: () => boolean
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isVisible: () => boolean
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show: () => void
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}
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type TimerHandle = ReturnType<typeof setTimeout>
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type WindowRevealOptions = {
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onRevealed?: () => void
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delayMs?: number
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setTimer?: (callback: () => void, delayMs: number) => TimerHandle
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clearTimer?: (timer: TimerHandle) => void
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}
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export const WINDOW_REVEAL_FALLBACK_MS = 4_000
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export function createWindowRevealController(
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window: WindowRevealTarget,
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{
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onRevealed = () => {},
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delayMs = WINDOW_REVEAL_FALLBACK_MS,
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setTimer = (callback, delay) => setTimeout(callback, delay),
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clearTimer = timer => clearTimeout(timer)
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}: WindowRevealOptions = {}
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) {
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let disposed = false
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let revealed = false
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let fallbackTimer: TimerHandle | null = null
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const cancelFallback = () => {
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if (fallbackTimer === null) {
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return
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}
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clearTimer(fallbackTimer)
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fallbackTimer = null
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}
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const reveal = () => {
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if (disposed || revealed || window.isDestroyed()) {
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return false
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}
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revealed = true
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cancelFallback()
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if (!window.isVisible()) {
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window.show()
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}
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onRevealed()
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return true
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}
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const scheduleFallback = () => {
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if (disposed || revealed || fallbackTimer !== null || window.isDestroyed()) {
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return
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}
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fallbackTimer = setTimer(() => {
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fallbackTimer = null
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reveal()
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}, delayMs)
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}
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const dispose = () => {
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disposed = true
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cancelFallback()
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}
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return {
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dispose,
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reveal,
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scheduleFallback
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}
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}
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