Reduce recomposition of MangaHeader (#9985)
* Reduce recomposition of MangaHeader * Reuse `Modifier` for `Tags` Reference: https://developer.android.com/jetpack/compose/modifiers#reusing-modifiers * Don't recalculate Read State on recomposition * Fix Linting issue * Optimize chapter state calculations
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LooKeR
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78aa50bb35
@ -268,8 +268,14 @@ private fun MangaScreenSmallImpl(
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val chapters = remember(state) { state.processedChapters }
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val isAnySelected by remember {
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derivedStateOf {
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chapters.fastAny { it.selected }
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}
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}
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val internalOnBackPressed = {
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if (chapters.fastAny { it.selected }) {
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if (isAnySelected) {
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onAllChapterSelected(false)
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} else {
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onBackClicked()
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@ -279,17 +285,22 @@ private fun MangaScreenSmallImpl(
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Scaffold(
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topBar = {
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val firstVisibleItemIndex by remember {
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derivedStateOf { chapterListState.firstVisibleItemIndex }
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val selectedChapterCount: Int = remember(chapters) {
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chapters.count { it.selected }
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}
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val firstVisibleItemScrollOffset by remember {
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derivedStateOf { chapterListState.firstVisibleItemScrollOffset }
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val isFirstItemVisible by remember {
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derivedStateOf { chapterListState.firstVisibleItemIndex == 0 }
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}
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val isFirstItemScrolled by remember {
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derivedStateOf { chapterListState.firstVisibleItemScrollOffset > 0 }
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}
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val animatedTitleAlpha by animateFloatAsState(
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if (firstVisibleItemIndex > 0) 1f else 0f,
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if (!isFirstItemVisible) 1f else 0f,
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label = "Top Bar Title",
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)
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val animatedBgAlpha by animateFloatAsState(
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if (firstVisibleItemIndex > 0 || firstVisibleItemScrollOffset > 0) 1f else 0f,
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if (!isFirstItemVisible || isFirstItemScrolled) 1f else 0f,
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label = "Top Bar Background",
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)
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MangaToolbar(
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title = state.manga.title,
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@ -303,14 +314,17 @@ private fun MangaScreenSmallImpl(
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onClickEditCategory = onEditCategoryClicked,
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onClickRefresh = onRefresh,
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onClickMigrate = onMigrateClicked,
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actionModeCounter = chapters.count { it.selected },
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actionModeCounter = selectedChapterCount,
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onSelectAll = { onAllChapterSelected(true) },
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onInvertSelection = { onInvertSelection() },
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)
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},
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bottomBar = {
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val selectedChapters = remember(chapters) {
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chapters.filter { it.selected }
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}
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SharedMangaBottomActionMenu(
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selected = chapters.filter { it.selected },
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selected = selectedChapters,
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onMultiBookmarkClicked = onMultiBookmarkClicked,
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onMultiMarkAsReadClicked = onMultiMarkAsReadClicked,
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onMarkPreviousAsReadClicked = onMarkPreviousAsReadClicked,
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@ -321,19 +335,20 @@ private fun MangaScreenSmallImpl(
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},
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snackbarHost = { SnackbarHost(hostState = snackbarHostState) },
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floatingActionButton = {
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val isFABVisible = remember(chapters) {
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chapters.fastAny { !it.chapter.read } && !isAnySelected
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}
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AnimatedVisibility(
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visible = chapters.fastAny { !it.chapter.read } && chapters.fastAll { !it.selected },
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visible = isFABVisible,
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enter = fadeIn(),
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exit = fadeOut(),
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) {
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ExtendedFloatingActionButton(
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text = {
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val id = if (state.chapters.fastAny { it.chapter.read }) {
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R.string.action_resume
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} else {
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R.string.action_start
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val isReading = remember(state.chapters) {
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state.chapters.fastAny { it.chapter.read }
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}
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Text(text = stringResource(id))
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Text(text = stringResource(if (isReading) R.string.action_resume else R.string.action_start))
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},
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icon = { Icon(imageVector = Icons.Filled.PlayArrow, contentDescription = null) },
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onClick = onContinueReading,
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@ -347,7 +362,7 @@ private fun MangaScreenSmallImpl(
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PullRefresh(
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refreshing = state.isRefreshingData,
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onRefresh = onRefresh,
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enabled = chapters.fastAll { !it.selected },
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enabled = !isAnySelected,
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indicatorPadding = WindowInsets.systemBars.only(WindowInsetsSides.Top).asPaddingValues(),
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) {
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val layoutDirection = LocalLayoutDirection.current
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@ -419,10 +434,13 @@ private fun MangaScreenSmallImpl(
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key = MangaScreenItem.CHAPTER_HEADER,
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contentType = MangaScreenItem.CHAPTER_HEADER,
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) {
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val missingChapterCount = remember(chapters) {
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chapters.map { it.chapter.chapterNumber }.missingChaptersCount()
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}
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ChapterHeader(
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enabled = chapters.fastAll { !it.selected },
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enabled = !isAnySelected,
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chapterCount = chapters.size,
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missingChapterCount = chapters.map { it.chapter.chapterNumber }.missingChaptersCount(),
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missingChapterCount = missingChapterCount,
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onClick = onFilterClicked,
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)
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}
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@ -500,12 +518,18 @@ fun MangaScreenLargeImpl(
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val chapters = remember(state) { state.processedChapters }
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val isAnySelected by remember {
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derivedStateOf {
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chapters.fastAny { it.selected }
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}
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}
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val insetPadding = WindowInsets.systemBars.only(WindowInsetsSides.Horizontal).asPaddingValues()
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var topBarHeight by remember { mutableIntStateOf(0) }
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PullRefresh(
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refreshing = state.isRefreshingData,
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onRefresh = onRefresh,
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enabled = chapters.fastAll { !it.selected },
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enabled = !isAnySelected,
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indicatorPadding = PaddingValues(
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start = insetPadding.calculateStartPadding(layoutDirection),
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top = with(density) { topBarHeight.toDp() },
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@ -515,7 +539,7 @@ fun MangaScreenLargeImpl(
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val chapterListState = rememberLazyListState()
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val internalOnBackPressed = {
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if (chapters.fastAny { it.selected }) {
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if (isAnySelected) {
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onAllChapterSelected(false)
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} else {
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onBackClicked()
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@ -525,10 +549,13 @@ fun MangaScreenLargeImpl(
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Scaffold(
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topBar = {
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val selectedChapterCount = remember(chapters) {
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chapters.count { it.selected }
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}
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MangaToolbar(
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modifier = Modifier.onSizeChanged { topBarHeight = it.height },
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title = state.manga.title,
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titleAlphaProvider = { if (chapters.fastAny { it.selected }) 1f else 0f },
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titleAlphaProvider = { if (isAnySelected) 1f else 0f },
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backgroundAlphaProvider = { 1f },
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hasFilters = state.manga.chaptersFiltered(),
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onBackClicked = internalOnBackPressed,
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@ -538,7 +565,7 @@ fun MangaScreenLargeImpl(
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onClickEditCategory = onEditCategoryClicked,
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onClickRefresh = onRefresh,
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onClickMigrate = onMigrateClicked,
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actionModeCounter = chapters.count { it.selected },
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actionModeCounter = selectedChapterCount,
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onSelectAll = { onAllChapterSelected(true) },
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onInvertSelection = { onInvertSelection() },
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)
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@ -548,8 +575,11 @@ fun MangaScreenLargeImpl(
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modifier = Modifier.fillMaxWidth(),
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contentAlignment = Alignment.BottomEnd,
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) {
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val selectedChapters = remember(chapters) {
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chapters.filter { it.selected }
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}
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SharedMangaBottomActionMenu(
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selected = chapters.filter { it.selected },
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selected = selectedChapters,
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onMultiBookmarkClicked = onMultiBookmarkClicked,
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onMultiMarkAsReadClicked = onMultiMarkAsReadClicked,
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onMarkPreviousAsReadClicked = onMarkPreviousAsReadClicked,
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@ -561,19 +591,20 @@ fun MangaScreenLargeImpl(
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},
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snackbarHost = { SnackbarHost(hostState = snackbarHostState) },
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floatingActionButton = {
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val isFABVisible = remember(chapters) {
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chapters.fastAny { !it.chapter.read } && !isAnySelected
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}
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AnimatedVisibility(
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visible = chapters.fastAny { !it.chapter.read } && chapters.fastAll { !it.selected },
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visible = isFABVisible,
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enter = fadeIn(),
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exit = fadeOut(),
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) {
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ExtendedFloatingActionButton(
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text = {
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val id = if (state.chapters.fastAny { it.chapter.read }) {
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R.string.action_resume
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} else {
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R.string.action_start
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val isReading = remember(state.chapters) {
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state.chapters.fastAny { it.chapter.read }
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}
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Text(text = stringResource(id))
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Text(text = stringResource(if (isReading) R.string.action_resume else R.string.action_start))
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},
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icon = { Icon(imageVector = Icons.Filled.PlayArrow, contentDescription = null) },
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onClick = onContinueReading,
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@ -644,10 +675,13 @@ fun MangaScreenLargeImpl(
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key = MangaScreenItem.CHAPTER_HEADER,
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contentType = MangaScreenItem.CHAPTER_HEADER,
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) {
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val missingChapterCount = remember(chapters) {
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chapters.map { it.chapter.chapterNumber }.missingChaptersCount()
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}
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ChapterHeader(
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enabled = chapters.fastAll { !it.selected },
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enabled = !isAnySelected,
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chapterCount = chapters.size,
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missingChapterCount = chapters.map { it.chapter.chapterNumber }.missingChaptersCount(),
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missingChapterCount = missingChapterCount,
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onClick = onFilterButtonClicked,
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)
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}
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@ -286,7 +286,7 @@ fun ExpandableMangaDescription(
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) {
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tags.forEach {
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TagsChip(
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modifier = Modifier.padding(vertical = 4.dp),
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modifier = DefaultTagChipModifier,
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text = it,
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onClick = {
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tagSelected = it
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@ -302,7 +302,7 @@ fun ExpandableMangaDescription(
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) {
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items(items = tags) {
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TagsChip(
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modifier = Modifier.padding(vertical = 4.dp),
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modifier = DefaultTagChipModifier,
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text = it,
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onClick = {
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tagSelected = it
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@ -654,6 +654,8 @@ private fun MangaSummary(
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}
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}
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private val DefaultTagChipModifier = Modifier.padding(vertical = 4.dp)
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@Composable
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private fun TagsChip(
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text: String,
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