124 lines
4.5 KiB
Swift
124 lines
4.5 KiB
Swift
import UIKit
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extension IndexPath {
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/// Convenience init with `section: 0`
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public init(row: Int) { self.init(row: row, section: 0) }
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}
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extension UIRefreshControl {
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convenience init(call: Selector, on target: Any) {
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self.init()
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addTarget(target, action: call, for: .valueChanged)
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}
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}
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// MARK: - UITableView
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extension UITableView {
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/// Returns `true` if this `tableView` is the currently frontmost visible
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var isFrontmost: Bool { window?.isKeyWindow ?? false }
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/// If frontmost window, perform `insertRows()`; If not, perform `reloadData()`
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func safeInsertRow(_ index: Int, with animation: UITableView.RowAnimation = .automatic) {
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isFrontmost ? insertRows(at: [IndexPath(row: index)], with: animation) : reloadData()
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}
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/// If frontmost window, perform `insertRows()`; If not, perform `reloadData()`
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func safeInsertRows(_ range: Range<Int>, with animation: UITableView.RowAnimation = .automatic) {
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isFrontmost ? insertRows(at: range.map {IndexPath(row: $0)}, with: animation) : reloadData()
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}
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/// If frontmost window, perform `deleteRows()`; If not, perform `reloadData()`
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func safeDeleteRows(_ indices: [Int], with animation: UITableView.RowAnimation = .automatic) {
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isFrontmost ? deleteRows(at: indices.map {IndexPath(row: $0)}, with: animation) : reloadData()
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}
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/// If frontmost window, perform `deleteRows()`; If not, perform `reloadData()`
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func safeDeleteRows(_ range: Range<Int>, with animation: UITableView.RowAnimation = .automatic) {
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isFrontmost ? deleteRows(at: range.map {IndexPath(row: $0)}, with: animation) : reloadData()
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}
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/// If frontmost window, perform `reloadRows()`; If not, perform `reloadData()`
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func safeReloadRow(_ index: Int, with animation: UITableView.RowAnimation = .automatic) {
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isFrontmost ? reloadRows(at: [IndexPath(row: index)], with: animation) : reloadData()
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}
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/// If frontmost window, perform `moveRow()`; If not, perform `reloadData()`
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func safeMoveRow(_ from: Int, to: Int) {
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isFrontmost ? moveRow(at: IndexPath(row: from), to: IndexPath(row: to)) : reloadData()
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}
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}
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// MARK: - EditableRows
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public enum RowAction {
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case ignore, block, delete
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}
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protocol EditableRows {
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func editableRowUserInfo(_ index: IndexPath) -> Any?
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func editableRowActions(_ index: IndexPath) -> [(RowAction, String)]
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func editableRowActionColor(_ index: IndexPath, _ action: RowAction) -> UIColor?
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@discardableResult func editableRowCallback(_ atIndexPath: IndexPath, _ action: RowAction, _ userInfo: Any?) -> Bool
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}
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extension EditableRows where Self: UITableViewDelegate {
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func getRowActionsIOS9(_ index: IndexPath, _ table: UITableView) -> [UITableViewRowAction]? {
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let userInfo = editableRowUserInfo(index)
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return editableRowActions(index).compactMap { a,t in
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let x = UITableViewRowAction(style: a == .delete ? .destructive : .normal, title: t) {
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self.editableRowCallback($1, a, userInfo)
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table.isEditing = false
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}
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if let color = editableRowActionColor(index, a) {
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x.backgroundColor = color
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}
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return x
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}
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}
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@available(iOS 11.0, *)
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func getRowActionsIOS11(_ index: IndexPath) -> UISwipeActionsConfiguration? {
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let userInfo = editableRowUserInfo(index)
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return UISwipeActionsConfiguration(actions: editableRowActions(index).compactMap { a,t in
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let x = UIContextualAction(style: a == .delete ? .destructive : .normal, title: t) { $2(self.editableRowCallback(index, a, userInfo)) }
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x.backgroundColor = editableRowActionColor(index, a)
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return x
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})
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}
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func editableRowUserInfo(_ index: IndexPath) -> Any? { nil }
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}
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protocol EditActionsRemove : EditableRows {}
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extension EditActionsRemove where Self: UITableViewController {
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func editableRowActions(_: IndexPath) -> [(RowAction, String)] { [(.delete, "Remove")] }
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func editableRowActionColor(_: IndexPath, _: RowAction) -> UIColor? { nil }
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}
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// MARK: - Table Cell Tap Menu
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struct TableCellTapMenu {
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private var index: Int = Int.max
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mutating func reset() { index = Int.max }
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/// Create a new tap manu and shows it immediatelly. With optional buttons.
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mutating func start(_ tableView: UITableView, _ indexPath: IndexPath, items: [UIMenuItem]? = nil) -> Bool {
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let menu = UIMenuController.shared
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if index == indexPath.row {
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menu.setMenuVisible(false, animated: true)
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reset()
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return false
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}
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index = indexPath.row
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let cell = tableView.cellForRow(at: indexPath)!
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menu.setTargetRect(cell.bounds, in: cell)
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menu.menuItems = items
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menu.setMenuVisible(true, animated: true)
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return true
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}
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/// Returns the item if the array index is in bounds.
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func getSelected<T>(_ source: [T]) -> T? {
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guard index < source.count else { return nil }
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return source[index]
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}
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}
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