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Make iOS drops more accurate

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This commit is contained in:
Maurice Parker
2022-11-11 20:48:42 -06:00
parent d45f6cd3a7
commit 5253033eac
2 changed files with 55 additions and 56 deletions
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49
iOS/MasterFeed/MasterFeedViewController+Drop.swift
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@@ -18,16 +18,15 @@ extension MasterFeedViewController: UITableViewDropDelegate {
}
func tableView(_ tableView: UITableView, dropSessionDidUpdate session: UIDropSession, withDestinationIndexPath destinationIndexPath: IndexPath?) -> UITableViewDropProposal {
guard let destIndexPath = destinationIndexPath, destIndexPath.section > 0, tableView.hasActiveDrag else {
guard let destIndexPath = correctDestinationIndexPath(session: session), destIndexPath.section > 0, tableView.hasActiveDrag else {
return UITableViewDropProposal(operation: .forbidden)
}
guard let destFeed = coordinator.nodeFor(destIndexPath)?.representedObject as? Feed,
let destAccount = destFeed.account,
let destCell = tableView.cellForRow(at: destIndexPath) else {
return UITableViewDropProposal(operation: .forbidden)
}
let destAccount = destFeed.account else {
return UITableViewDropProposal(operation: .forbidden)
}
// Validate account specific behaviors...
if destAccount.behaviors.contains(.disallowFeedInMultipleFolders),
let sourceNode = session.localDragSession?.items.first?.localObject as? Node,
@@ -38,11 +37,7 @@ extension MasterFeedViewController: UITableViewDropDelegate {
// Determine the correct drop proposal
if destFeed is Folder {
if session.location(in: destCell).y >= 0 {
return UITableViewDropProposal(operation: .move, intent: .insertIntoDestinationIndexPath)
} else {
return UITableViewDropProposal(operation: .move, intent: .unspecified)
}
return UITableViewDropProposal(operation: .move, intent: .insertIntoDestinationIndexPath)
} else {
return UITableViewDropProposal(operation: .move, intent: .insertAtDestinationIndexPath)
}
@@ -53,21 +48,14 @@ extension MasterFeedViewController: UITableViewDropDelegate {
guard let dragItem = dropCoordinator.items.first?.dragItem,
let dragNode = dragItem.localObject as? Node,
let source = dragNode.parent?.representedObject as? Container,
let destIndexPath = dropCoordinator.destinationIndexPath else {
return
}
let isFolderDrop: Bool = {
if coordinator.nodeFor(destIndexPath)?.representedObject is Folder, let propCell = tableView.cellForRow(at: destIndexPath) {
return dropCoordinator.session.location(in: propCell).y >= 0
}
return false
}()
let destIndexPath = correctDestinationIndexPath(session: dropCoordinator.session) else {
return
}
// Based on the drop we have to determine a node to start looking for a parent container.
let destNode: Node? = {
if isFolderDrop {
if coordinator.nodeFor(destIndexPath)?.representedObject is Folder {
return coordinator.nodeFor(destIndexPath)
} else {
if destIndexPath.row == 0 {
@@ -99,7 +87,22 @@ extension MasterFeedViewController: UITableViewDropDelegate {
moveWebFeedBetweenAccounts(feed: webFeed, sourceContainer: source, destinationContainer: destination)
}
}
}
private extension MasterFeedViewController {
func correctDestinationIndexPath(session: UIDropSession) -> IndexPath? {
let location = session.location(in: tableView)
var correctDestination: IndexPath?
tableView.performUsingPresentationValues {
correctDestination = tableView.indexPathForRow(at: location)
}
return correctDestination
}
func moveWebFeedInAccount(feed: WebFeed, sourceContainer: Container, destinationContainer: Container) {
guard sourceContainer !== destinationContainer else { return }