mastodon-ios/Mastodon/Protocol/Provider/DataSourceProvider+TableVie...

156 lines
5.4 KiB
Swift

//
// DataSourceProvider+TableViewControllerNavigateable.swift
// Mastodon
//
// Created by MainasuK on 2022-2-16.
//
import UIKit
import MastodonCore
extension TableViewControllerNavigateableCore where Self: TableViewControllerNavigateableRelay {
var navigationKeyCommands: [UIKeyCommand] {
TableViewNavigation.allCases.map { navigation in
UIKeyCommand(
title: navigation.title,
image: nil,
action: #selector(Self.navigateKeyCommandHandlerRelay(_:)),
input: navigation.input,
modifierFlags: navigation.modifierFlags,
propertyList: navigation.propertyList,
alternates: [],
discoverabilityTitle: nil,
attributes: [],
state: .off
)
}
}
}
extension TableViewControllerNavigateableCore {
func navigateKeyCommandHandler(_ sender: UIKeyCommand) {
guard let rawValue = sender.propertyList as? String,
let navigation = TableViewNavigation(rawValue: rawValue) else { return }
switch navigation {
case .up: navigate(direction: .up)
case .down: navigate(direction: .down)
case .back: back()
case .open: open()
}
}
}
// navigate status up/down
extension TableViewControllerNavigateableCore where Self: DataSourceProvider {
func navigate(direction: TableViewNavigationDirection) {
if let indexPathForSelectedRow = tableView.indexPathForSelectedRow {
// navigate up/down on the current selected item
Task {
await navigateToStatus(direction: direction, indexPath: indexPathForSelectedRow)
}
} else {
// set first visible item selected
navigateToFirstVisibleStatus()
}
}
@MainActor
private func navigateToStatus(
direction: TableViewNavigationDirection,
indexPath: IndexPath
) async {
let row: Int = {
let index = indexPath.row
switch direction {
case .up: return index - 1
case .down: return index + 1
}
}()
let indexPath = IndexPath(row: row , section: indexPath.section)
guard indexPath.section >= 0, indexPath.section < tableView.numberOfSections,
indexPath.row >= 0, indexPath.row < tableView.numberOfRows(inSection: indexPath.section)
else { return }
let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
}
private func navigateToFirstVisibleStatus() {
guard var indexPathsForVisibleRows = tableView.indexPathsForVisibleRows?.sorted() else { return }
if indexPathsForVisibleRows.first?.row != 0 {
// drop first when visible not the first cell of table
indexPathsForVisibleRows.removeFirst()
}
guard let indexPath = indexPathsForVisibleRows.first else { return }
let scrollPosition: UITableView.ScrollPosition = overrideNavigationScrollPosition ?? Self.navigateScrollPosition(tableView: tableView, indexPath: indexPath)
tableView.selectRow(at: indexPath, animated: true, scrollPosition: scrollPosition)
}
static func validNavigateableItem(_ item: DataSourceItem) -> Bool {
switch item {
case .status,
.notification:
return true
default:
return false
}
}
}
extension TableViewControllerNavigateableCore {
// check is visible and not the first and last
static func navigateScrollPosition(tableView: UITableView, indexPath: IndexPath) -> UITableView.ScrollPosition {
let middleVisibleIndexPaths = (tableView.indexPathsForVisibleRows ?? [])
.sorted()
.dropFirst()
.dropLast()
guard middleVisibleIndexPaths.contains(indexPath) else {
return .top
}
guard middleVisibleIndexPaths.count > 2 else {
return .middle
}
return .none
}
}
extension TableViewControllerNavigateableCore where Self: DataSourceProvider & AuthContextProvider {
func open() {
guard let indexPathForSelectedRow = tableView.indexPathForSelectedRow else { return }
let source = DataSourceItem.Source(indexPath: indexPathForSelectedRow)
Task { @MainActor in
guard let item = await item(from: source) else { return }
switch item {
case .status(let record):
await DataSourceFacade.coordinateToStatusThreadScene(
provider: self,
target: .status,
status: record
)
case .notification:
assertionFailure()
default:
assertionFailure()
}
} // end Task
// StatusProviderFacade.coordinateToStatusThreadScene(for: .primary, provider: self, indexPath: indexPathForSelectedRow)
}
}
extension TableViewControllerNavigateableCore where Self: UIViewController {
func back() {
UserDefaults.shared.backKeyCommandPressDate = Date()
navigationController?.popViewController(animated: true)
}
}