Reapply "Add scroll bar to quick search and download label"

This reverts commit a52ab28534.

app/src/main/kotlin/com/hippo/ehviewer/ui/screen/DownloadsScreen.kt

@@ -20,7 +20,6 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.systemBars
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -300,7 +299,7 @@ fun AnimatedVisibilityScope.DownloadsScreen(navigator: DestinationsNavigator) =
             hapticFeedback.performHapticFeedback(HapticFeedbackType.MOVE)
         }
         var fromIndex by remember { mutableIntStateOf(-1) }
-        LazyColumn(
+        FastScrollLazyColumn(
             modifier = Modifier.fillMaxSize(),
             state = labelsListState,
             contentPadding = WindowInsets.systemBars.only(WindowInsetsSides.Bottom).asPaddingValues(),

app/src/main/kotlin/com/hippo/ehviewer/ui/screen/GalleryListScreen.kt

@@ -23,7 +23,6 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.only
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.systemBars
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.grid.rememberLazyGridState
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -127,6 +126,7 @@ import com.hippo.ehviewer.ui.main.ImageSearch
 import com.hippo.ehviewer.ui.main.SearchFilter
 import com.hippo.ehviewer.ui.tools.Await
 import com.hippo.ehviewer.ui.tools.EmptyWindowInsets
+import com.hippo.ehviewer.ui.tools.FastScrollLazyColumn
 import com.hippo.ehviewer.ui.tools.HapticFeedbackType
 import com.hippo.ehviewer.ui.tools.animateFloatMergePredictiveBackAsState
 import com.hippo.ehviewer.ui.tools.delegateSnapshotUpdate
@@ -375,7 +375,7 @@ fun AnimatedVisibilityScope.GalleryListScreen(lub: ListUrlBuilder, navigator: De
                     hapticFeedback.performHapticFeedback(HapticFeedbackType.MOVE)
                 }
                 var fromIndex by remember { mutableIntStateOf(-1) }
-                LazyColumn(
+                FastScrollLazyColumn(
                     modifier = Modifier.fillMaxSize(),
                     state = quickSearchListState,
                     contentPadding = WindowInsets.systemBars.only(WindowInsetsSides.Bottom).asPaddingValues(),

app/src/main/kotlin/com/hippo/ehviewer/ui/tools/Dialog.kt

@@ -459,7 +459,7 @@ class DialogState {
                     style = MaterialTheme.typography.headlineSmall,
                 )
             }
-            LazyColumn {
+            FastScrollLazyColumn {
                 itemsIndexed(items) { index, text ->
                     CheckableItem(
                         text = text,
@@ -495,7 +495,7 @@ class DialogState {
                 modifier = Modifier.padding(horizontal = 24.dp, vertical = 8.dp),
                 style = MaterialTheme.typography.headlineSmall,
             )
-            LazyColumn {
+            FastScrollLazyColumn {
                 itemsIndexed(items) { index, text ->
                     CheckableItem(
                         text = text,

app/src/main/kotlin/com/hippo/ehviewer/ui/tools/LazyList.kt

@@ -1,7 +1,6 @@
 package com.hippo.ehviewer.ui.tools
 
 import androidx.compose.foundation.layout.Arrangement
-import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.LazyListScope
@@ -11,6 +10,8 @@ import androidx.compose.foundation.scrollbar.rememberScrollbarAdapter
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.layout.Layout
+import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
 
 @Composable
@@ -24,7 +25,7 @@ fun FastScrollLazyColumn(
     userScrollEnabled: Boolean = true,
     content: LazyListScope.() -> Unit,
 ) {
-    Box {
+    Layout({
         LazyColumn(
             modifier = modifier,
             state = state,
@@ -38,8 +39,13 @@ fun FastScrollLazyColumn(
         VerticalScrollbar(
             adapter = rememberScrollbarAdapter(state),
             isScrollInProgress = state.isScrollInProgress,
-            modifier = Modifier.align(Alignment.TopEnd),
             contentPadding = contentPadding,
         )
+    }) { measurables, constraints ->
+        val (column, scrollbar) = measurables.map { it.measure(constraints) }
+        layout(column.width, column.height) {
+            column.place(IntOffset.Zero)
+            scrollbar.placeRelative(column.width - scrollbar.width, 0)
+        }
     }
 }