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Handle web lifecycle events for visibility and focus changes #2219

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Merged
merged 1 commit into from
Jul 7, 2025
Merged

Handle web lifecycle events for visibility and focus changes #2219

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22 changes: 21 additions & 1 deletion compose/ui/ui/src/webCommonW3C/kotlin/androidx/compose/ui/window/ComposeWindow.web.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -382,6 +382,13 @@ internal class ComposeWindow(
state.globalEvents.addDisposableEvent("blur") {
lifecycle.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE)
}

state.globalEvents.addDisposableEvent("visibilitychange") { event ->
lifecycle.handleLifecycleEvent(
if (documentIsVisible()) Lifecycle.Event.ON_START
else Lifecycle.Event.ON_STOP
)
}
}

init {
Expand Down Expand Up @@ -415,7 +422,10 @@ internal class ComposeWindow(
)
}

lifecycle.handleLifecycleEvent(if (document.hasFocus()) Lifecycle.Event.ON_RESUME else Lifecycle.Event.ON_START)
lifecycle.handleLifecycleEvent(
if (document.hasFocus()) Lifecycle.Event.ON_RESUME
else Lifecycle.Event.ON_START
)
}

fun resize(boxSize: IntSize) {
Expand Down Expand Up @@ -462,6 +472,13 @@ internal class ComposeWindow(
event: TouchEvent,
offset: Offset,
) {
// iOS Safari doesn't request focus when the page is shown,
// and the lifecycle doesn't trigger ON_RESUME.
// so, we decided to handle every touch
if (lifecycle.currentState != Lifecycle.State.RESUMED) {
lifecycle.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)
}

val inputModeManager = platformContext.inputModeManager
if (inputModeManager.inputMode != InputMode.Touch) {
inputModeManager.requestInputMode(InputMode.Touch)
Expand Down Expand Up @@ -581,6 +598,9 @@ internal class ComposeWindow(
) * density.density
}

//https://developer.mozilla.org/en-US/docs/Web/API/Document/visibilityState
private fun documentIsVisible(): Boolean = js("document.visibilityState === 'visible'")

private const val defaultCanvasElementId = "ComposeTarget"

/**
Expand Down