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Remove the visible room computation bounds padding to reduce bandwidth

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This commit is contained in:
Stefan Ceriu
2023-08-31 11:16:41 +03:00
committed by Stefan Ceriu
parent dbee85a929
commit 2ba92a074e
1 changed files with 1 additions and 9 deletions
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ElementX/Sources/Screens/HomeScreen/View/HomeScreen.swift
+1 -9
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@@ -20,10 +20,6 @@ import SwiftUI
import SwiftUIIntrospect import SwiftUIIntrospect
struct HomeScreen: View { struct HomeScreen: View {
enum Constants {
static let slidingWindowBoundsPadding = 5
}
@ObservedObject var context: HomeScreenViewModel.Context @ObservedObject var context: HomeScreenViewModel.Context
@State private var scrollViewAdapter = ScrollViewAdapter() @State private var scrollViewAdapter = ScrollViewAdapter()
@@ -205,12 +201,8 @@ struct HomeScreen: View {
let firstIndex = Int(max(0.0, scrollView.contentOffset.y + scrollView.contentInset.top) / cellHeight) let firstIndex = Int(max(0.0, scrollView.contentOffset.y + scrollView.contentInset.top) / cellHeight)
let lastIndex = Int(max(0.0, scrollView.contentOffset.y + scrollView.bounds.height) / cellHeight) let lastIndex = Int(max(0.0, scrollView.contentOffset.y + scrollView.bounds.height) / cellHeight)
// Add some extra padding just to be on the safe side
let lowerBound = max(0, firstIndex - Constants.slidingWindowBoundsPadding)
let upperBound = min(Int(context.viewState.rooms.count), lastIndex + Constants.slidingWindowBoundsPadding)
// This will be deduped and throttled on the view model layer // This will be deduped and throttled on the view model layer
context.send(viewAction: .updateVisibleItemRange(range: lowerBound..<upperBound, isScrolling: scrollViewAdapter.isScrolling.value)) context.send(viewAction: .updateVisibleItemRange(range: firstIndex..<lastIndex, isScrolling: scrollViewAdapter.isScrolling.value))
} }
@ViewBuilder @ViewBuilder