Prevent recomposition every frame in TileLabel (86a125e1) · Commits · e / os / android_frameworks_base

packages/SystemUI/src/com/android/systemui/qs/composefragment/QSFragmentCompose.kt

+41 −25

Original line number	Diff line number	Diff line
		@@ -57,6 +57,8 @@ import androidx.compose.runtime.Composable
		import androidx.compose.runtime.CompositionLocalProvider
		import androidx.compose.runtime.DisposableEffect
		import androidx.compose.runtime.LaunchedEffect
		import androidx.compose.runtime.State
		import androidx.compose.runtime.derivedStateOf
		import androidx.compose.runtime.getValue
		import androidx.compose.runtime.mutableFloatStateOf
		import androidx.compose.runtime.remember
		@@ -688,20 +690,26 @@ constructor(
		) {
		val Tiles =
		@Composable {
		// When always compose is false, this will always be true, and we'll be
		// listening whenever this is composed. When always compose is true, we
		// listen if we are visible and not fully expanded
		val isListening: () -> Boolean =
		if (alwaysCompose) {
		remember(viewModel) {
		derivedStateOf {
		viewModel.isQsVisibleAndAnyShadeExpanded &&
		viewModel.expansionState.progress < 1f &&
		!viewModel.isEditing
		}
		}
		.let { state -> { state.value } }
		} else {
		{ true }
		}

		QuickQuickSettings(
		viewModel = viewModel.quickQuickSettingsViewModel,
		listening = {
		/*
		* When always compose is false, this will always be true, and we'll be
		* listening whenever this is composed.
		* When always compose is true, we listen if we are visible and not
		* fully expanded
		*/
		!alwaysCompose \|\|
		(viewModel.isQsVisibleAndAnyShadeExpanded &&
		viewModel.expansionState.progress < 1f &&
		!viewModel.isEditing)
		},
		listening = isListening,
		)
		}
		val Media =
		@@ -834,22 +842,30 @@ constructor(
		@Composable {
		Box {
		GridAnchor()

		// When always compose is false, this will always be true, and
		// we'll be listening whenever this is composed. When always
		// compose is true, we look a the second condition and we'll
		// listen if QS is visible AND we are not fully collapsed.
		val isListening: () -> Boolean =
		if (alwaysCompose) {
		remember(viewModel) {
		derivedStateOf {
		viewModel.isQsVisibleAndAnyShadeExpanded &&
		viewModel.expansionState.progress >
		0f &&
		!viewModel.isEditing
		}
		}
		.let { state -> { state.value } }
		} else {
		{ true }
		}

		TileGrid(
		viewModel = containerViewModel.tileGridViewModel,
		modifier = Modifier.fillMaxWidth(),
		listening = {
		/*
		* When always compose is false, this will always be true,
		* and we'll be listening whenever this is composed.
		* When always compose is true, we look a the second
		* condition and we'll listen if QS is visible AND we are
		* not fully collapsed.
		*/
		!alwaysCompose \|\|
		(viewModel.isQsVisibleAndAnyShadeExpanded &&
		viewModel.expansionState.progress > 0f &&
		!viewModel.isEditing)
		},
		listening = isListening,
		)
		}
		}