Migrate Updates screen to compose (#7534)

* Migrate Updates screen to compose

* Review Changes + Cleanup

Remove more unused stuff and show confirmation dialog when mass deleting chapters

* Review Changes 2 + Rebase

app/src/main/java/eu/kanade/presentation/util/Constants.kt

@@ -12,3 +12,5 @@ val horizontalPadding = horizontal
 val verticalPadding = vertical
 
 val topPaddingValues = PaddingValues(top = vertical)
+
+const val ReadItemAlpha = .38f

app/src/main/java/eu/kanade/presentation/util/LazyListState.kt

@@ -27,3 +27,21 @@ fun LazyListState.isScrollingUp(): Boolean {
         }
     }.value
 }
+
+@Composable
+fun LazyListState.isScrollingDown(): Boolean {
+    var previousIndex by remember { mutableStateOf(firstVisibleItemIndex) }
+    var previousScrollOffset by remember { mutableStateOf(firstVisibleItemScrollOffset) }
+    return remember {
+        derivedStateOf {
+            if (previousIndex != firstVisibleItemIndex) {
+                previousIndex < firstVisibleItemIndex
+            } else {
+                previousScrollOffset <= firstVisibleItemScrollOffset
+            }.also {
+                previousIndex = firstVisibleItemIndex
+                previousScrollOffset = firstVisibleItemScrollOffset
+            }
+        }
+    }.value
+}

app/src/main/java/eu/kanade/presentation/util/NavBarVisibility.kt

@@ -0,0 +1,13 @@
+package eu.kanade.presentation.util
+
+enum class NavBarVisibility {
+    SHOW,
+    HIDE
+}
+
+fun NavBarVisibility.toBoolean(): Boolean {
+    return when (this) {
+        NavBarVisibility.SHOW -> true
+        NavBarVisibility.HIDE -> false
+    }
+}