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More precise chat offset calculation

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This commit is contained in:
Ali
2020-04-10 14:01:57 +04:00
parent 1cec1b71c6
commit 574a89251d
3 changed files with 46 additions and 7 deletions
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42
submodules/Display/Source/ListView.swift
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@@ -198,7 +198,7 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
}
}
public final var didScrollWithOffset: ((CGFloat) -> Void)?
public final var didScrollWithOffset: ((CGFloat, ContainedViewLayoutTransition) -> Void)?
private var topItemOverscrollBackground: ListViewOverscrollBackgroundNode?
private var bottomItemOverscrollBackground: ASDisplayNode?
@@ -754,7 +754,6 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
//CATransaction.setDisableActions(true)
let deltaY = scrollView.contentOffset.y - self.lastContentOffset.y
self.didScrollWithOffset?(deltaY)
self.generalAccumulatedDeltaY += deltaY
if abs(self.generalAccumulatedDeltaY) > 14.0 {
@@ -790,6 +789,8 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
anchor = 0.0
}
self.didScrollWithOffset?(deltaY, .immediate)
for itemNode in self.itemNodes {
itemNode.updateFrame(itemNode.frame.offsetBy(dx: 0.0, dy: -deltaY), within: self.visibleSize)
@@ -1069,6 +1070,8 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
}
if abs(offset) > CGFloat.ulpOfOne {
self.didScrollWithOffset?(-offset, .immediate)
for itemNode in self.itemNodes {
var frame = itemNode.frame
frame.origin.y += offset
@@ -2618,6 +2621,22 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
}
}
if !offset.isZero {
let scrollToItemTransition: ContainedViewLayoutTransition
if !scrollToItem.animated {
scrollToItemTransition = .immediate
} else {
switch scrollToItem.curve {
case let .Spring(duration):
scrollToItemTransition = .animated(duration: duration, curve: .spring)
case let .Default(duration):
scrollToItemTransition = .animated(duration: duration ?? 0.3, curve: .easeInOut)
}
}
self.didScrollWithOffset?(-offset, scrollToItemTransition)
}
for itemNode in self.itemNodes {
var frame = itemNode.frame
frame.origin.y += offset
@@ -2689,6 +2708,20 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
self.ensureTopInsetForOverlayHighlightedItems = updateSizeAndInsets.ensureTopInsetForOverlayHighlightedItems
self.visibleSize = updateSizeAndInsets.size
let updateSizeAndInsetsTransition: ContainedViewLayoutTransition
if updateSizeAndInsets.duration.isZero {
updateSizeAndInsetsTransition = .immediate
} else {
switch updateSizeAndInsets.curve {
case let .Spring(duration):
updateSizeAndInsetsTransition = .animated(duration: duration, curve: .spring)
case let .Default(duration):
updateSizeAndInsetsTransition = .animated(duration: duration ?? 0.3, curve: .easeInOut)
}
}
self.didScrollWithOffset?(-offsetFix, updateSizeAndInsetsTransition)
for itemNode in self.itemNodes {
itemNode.updateFrame(itemNode.frame.offsetBy(dx: 0.0, dy: offsetFix), within: self.visibleSize)
}
@@ -2698,6 +2731,8 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
if !snappedTopInset.isZero && (previousVisibleSize.height.isZero || previousApparentFrames.isEmpty) {
offsetFix += snappedTopInset
self.didScrollWithOffset?(-offsetFix, .immediate)
for itemNode in self.itemNodes {
itemNode.updateFrame(itemNode.frame.offsetBy(dx: 0.0, dy: snappedTopInset), within: self.visibleSize)
}
@@ -2820,6 +2855,8 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
let (snappedTopInset, snapToBoundsOffset) = self.snapToBounds(snapTopItem: scrollToItem != nil && scrollToItem?.directionHint != .Down, stackFromBottom: self.stackFromBottom, updateSizeAndInsets: updateSizeAndInsets, scrollToItem: scrollToItem, insetDeltaOffsetFix: 0.0)
if !snappedTopInset.isZero && previousApparentFrames.isEmpty {
self.didScrollWithOffset?(-snappedTopInset, .immediate)
for itemNode in self.itemNodes {
itemNode.updateFrame(itemNode.frame.offsetBy(dx: 0.0, dy: snappedTopInset), within: self.visibleSize)
}
@@ -2930,6 +2967,7 @@ open class ListView: ASDisplayNode, UIScrollViewAccessibilityDelegate, UIGesture
self.updateItemHeaders(leftInset: listInsets.left, rightInset: listInsets.right, transition: headerNodesTransition, animateInsertion: animated || !requestItemInsertionAnimationsIndices.isEmpty)
if let offset = offset, !offset.isZero {
self.didScrollWithOffset?(-offset, headerNodesTransition.0)
let lowestNodeToInsertBelow = self.lowestNodeToInsertBelow()
for itemNode in temporaryPreviousNodes {
itemNode.updateFrame(itemNode.frame.offsetBy(dx: 0.0, dy: offset), within: self.visibleSize)