475 lines
12 KiB
Swift
475 lines
12 KiB
Swift
//
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// SidebarViewController.swift
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// Evergreen
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//
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// Created by Brent Simmons on 7/26/15.
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// Copyright © 2015 Ranchero Software, LLC. All rights reserved.
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//
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import Cocoa
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import RSTree
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import Data
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import Account
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import RSCore
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@objc class SidebarViewController: NSViewController, NSOutlineViewDelegate, NSOutlineViewDataSource, UndoableCommandRunner {
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@IBOutlet var outlineView: SidebarOutlineView!
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let treeControllerDelegate = SidebarTreeControllerDelegate()
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lazy var treeController: TreeController = {
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TreeController(delegate: treeControllerDelegate)
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}()
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var undoableCommands = [UndoableCommand]()
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private var animatingChanges = false
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private var sidebarCellAppearance: SidebarCellAppearance!
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//MARK: NSViewController
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override func viewDidLoad() {
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sidebarCellAppearance = SidebarCellAppearance(theme: appDelegate.currentTheme, fontSize: AppDefaults.shared.sidebarFontSize)
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outlineView.sidebarViewController = self
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outlineView.setDraggingSourceOperationMask(.move, forLocal: true)
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outlineView.setDraggingSourceOperationMask(.copy, forLocal: false)
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NotificationCenter.default.addObserver(self, selector: #selector(unreadCountDidChange(_:)), name: .UnreadCountDidChange, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(containerChildrenDidChange(_:)), name: .ChildrenDidChange, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(userDidAddFeed(_:)), name: .UserDidAddFeed, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(batchUpdateDidPerform(_:)), name: .BatchUpdateDidPerform, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(faviconDidBecomeAvailable(_:)), name: .FaviconDidBecomeAvailable, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(feedSettingDidChange(_:)), name: .FeedSettingDidChange, object: nil)
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outlineView.reloadData()
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// Always expand all group items on initial display.
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var row = 0
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while(true) {
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guard let item = outlineView.item(atRow: row) else {
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break
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}
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let node = item as! Node
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if node.isGroupItem {
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outlineView.expandItem(item)
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}
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row += 1
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}
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}
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//MARK: Notifications
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@objc dynamic func unreadCountDidChange(_ note: Notification) {
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guard let representedObject = note.object else {
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return
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}
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configureCellsForRepresentedObject(representedObject as AnyObject)
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}
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@objc dynamic func containerChildrenDidChange(_ note: Notification) {
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rebuildTreeAndReloadDataIfNeeded()
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}
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@objc dynamic func batchUpdateDidPerform(_ notification: Notification) {
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rebuildTreeAndReloadDataIfNeeded()
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}
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@objc dynamic func userDidAddFeed(_ note: Notification) {
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guard let appInfo = note.appInfo, let feed = appInfo.feed else {
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return
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}
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revealAndSelectRepresentedObject(feed)
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}
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@objc func faviconDidBecomeAvailable(_ note: Notification) {
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configureAvailableCells()
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}
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@objc func feedSettingDidChange(_ note: Notification) {
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guard let feed = note.object as? Feed else {
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return
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}
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configureCellsForRepresentedObject(feed)
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}
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// MARK: Actions
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@IBAction func delete(_ sender: AnyObject?) {
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if outlineView.selectionIsEmpty {
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return
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}
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let nodesToDelete = treeController.normalizedSelectedNodes(selectedNodes)
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guard let undoManager = undoManager, let deleteCommand = DeleteFromSidebarCommand(nodesToDelete: nodesToDelete, undoManager: undoManager) else {
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return
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}
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let selectedRows = outlineView.selectedRowIndexes
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animatingChanges = true
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outlineView.beginUpdates()
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outlineView.removeItems(at: selectedRows, inParent: nil, withAnimation: [.slideDown])
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outlineView.endUpdates()
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runCommand(deleteCommand)
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animatingChanges = false
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}
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// MARK: Navigation
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func canGoToNextUnread() -> Bool {
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if let _ = rowContainingNextUnread() {
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return true
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}
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return false
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}
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func goToNextUnread() {
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guard let row = rowContainingNextUnread() else {
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assertionFailure("goToNextUnread called before checking if there is a next unread.")
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return
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}
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outlineView.selectRowIndexes(IndexSet([row]), byExtendingSelection: false)
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NSApplication.shared.sendAction(NSSelectorFromString("nextUnread:"), to: nil, from: self)
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}
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// MARK: NSOutlineViewDelegate
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func outlineView(_ outlineView: NSOutlineView, viewFor tableColumn: NSTableColumn?, item: Any) -> NSView? {
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let node = item as! Node
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if node.isGroupItem {
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let cell = outlineView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "HeaderCell"), owner: self) as! NSTableCellView
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configureGroupCell(cell, node)
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return cell
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}
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let cell = outlineView.makeView(withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "DataCell"), owner: self) as! SidebarCell
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configure(cell, node)
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return cell
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}
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func outlineView(_ outlineView: NSOutlineView, isGroupItem item: Any) -> Bool {
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let node = item as! Node
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return node.isGroupItem
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}
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func outlineView(_ outlineView: NSOutlineView, selectionIndexesForProposedSelection proposedSelectionIndexes: IndexSet) -> IndexSet {
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// Don’t allow selecting group items.
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// If any index in IndexSet contains a group item,
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// return the current selection (not a modified version of the proposed selection).
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for index in proposedSelectionIndexes {
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if let node = nodeForRow(index), node.isGroupItem {
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return outlineView.selectedRowIndexes
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}
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}
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return proposedSelectionIndexes
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}
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func outlineViewSelectionDidChange(_ notification: Notification) {
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// TODO: support multiple selection
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let selectedRow = self.outlineView.selectedRow
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if selectedRow < 0 || selectedRow == NSNotFound {
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postSidebarSelectionDidChangeNotification(nil)
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return
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}
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if let selectedNode = self.outlineView.item(atRow: selectedRow) as? Node {
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postSidebarSelectionDidChangeNotification([selectedNode.representedObject])
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}
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}
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// MARK: NSOutlineViewDataSource
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func outlineView(_ outlineView: NSOutlineView, numberOfChildrenOfItem item: Any?) -> Int {
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return nodeForItem(item as AnyObject?).numberOfChildNodes
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}
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func outlineView(_ outlineView: NSOutlineView, child index: Int, ofItem item: Any?) -> Any {
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return nodeForItem(item as AnyObject?).childNodes![index]
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}
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func outlineView(_ outlineView: NSOutlineView, isItemExpandable item: Any) -> Bool {
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return nodeForItem(item as AnyObject?).canHaveChildNodes
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}
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func outlineView(_ outlineView: NSOutlineView, pasteboardWriterForItem item: Any) -> NSPasteboardWriting? {
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let node = nodeForItem(item as AnyObject?)
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if let feed = node.representedObject as? Feed {
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return FeedPasteboardWriter(feed: feed)
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}
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return nil
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}
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}
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//MARK: - Private
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private extension SidebarViewController {
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var selectedNodes: [Node] {
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get {
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if let nodes = outlineView.selectedItems as? [Node] {
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return nodes
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}
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return [Node]()
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}
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}
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func rebuildTreeAndReloadDataIfNeeded() {
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if !animatingChanges && !BatchUpdate.shared.isPerforming {
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treeController.rebuild()
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outlineView.reloadData()
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}
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}
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func postSidebarSelectionDidChangeNotification(_ selectedObjects: [AnyObject]?) {
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let appInfo = AppInfo()
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if let objects = selectedObjects {
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appInfo.objects = objects
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DispatchQueue.main.async {
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self.updateUnreadCounts(for: objects)
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}
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}
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appInfo.view = outlineView
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NotificationCenter.default.post(name: .SidebarSelectionDidChange, object: self, userInfo: appInfo.userInfo)
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}
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func updateUnreadCounts(for objects: [AnyObject]) {
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// On selection, update unread counts for folders and feeds.
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// For feeds, actually fetch from database.
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for object in objects {
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if let feed = object as? Feed, let account = feed.account {
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account.updateUnreadCounts(for: Set([feed]))
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}
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else if let folder = object as? Folder, let account = folder.account {
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account.updateUnreadCounts(for: folder.flattenedFeeds())
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}
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}
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}
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func nodeForItem(_ item: AnyObject?) -> Node {
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if item == nil {
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return treeController.rootNode
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}
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return item as! Node
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}
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func nodeForRow(_ row: Int) -> Node? {
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if row < 0 || row >= outlineView.numberOfRows {
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return nil
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}
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if let node = outlineView.item(atRow: row) as? Node {
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return node
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}
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return nil
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}
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func rowHasAtLeastOneUnreadArticle(_ row: Int) -> Bool {
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if let oneNode = nodeForRow(row) {
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if let unreadCountProvider = oneNode.representedObject as? UnreadCountProvider {
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if unreadCountProvider.unreadCount > 0 {
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return true
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}
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}
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}
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return false
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}
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func rowContainingNextUnread() -> Int? {
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let selectedRow = outlineView.selectedRow
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let numberOfRows = outlineView.numberOfRows
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var row = selectedRow + 1
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while (row < numberOfRows) {
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if rowHasAtLeastOneUnreadArticle(row) {
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return row
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}
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row += 1
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}
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row = 0
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while (row <= selectedRow) {
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if rowHasAtLeastOneUnreadArticle(row) {
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return row
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}
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row += 1
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}
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return nil
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}
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func configure(_ cell: SidebarCell, _ node: Node) {
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cell.cellAppearance = sidebarCellAppearance
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cell.objectValue = node
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cell.name = nameFor(node)
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cell.unreadCount = unreadCountFor(node)
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cell.image = imageFor(node)
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cell.shouldShowImage = node.representedObject is Feed
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}
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func configureGroupCell(_ cell: NSTableCellView, _ node: Node) {
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cell.objectValue = node
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cell.textField?.stringValue = nameFor(node)
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}
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func imageFor(_ node: Node) -> NSImage? {
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guard let feed = node.representedObject as? Feed else {
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return nil
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}
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return appDelegate.faviconDownloader.favicon(for: feed)
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}
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func nameFor(_ node: Node) -> String {
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if let displayNameProvider = node.representedObject as? DisplayNameProvider {
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return displayNameProvider.nameForDisplay
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}
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return ""
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}
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func unreadCountFor(_ node: Node) -> Int {
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if let unreadCountProvider = node.representedObject as? UnreadCountProvider {
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return unreadCountProvider.unreadCount
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}
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return 0
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}
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func cellForRowView(_ rowView: NSTableRowView) -> SidebarCell? {
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return rowView.view(atColumn: 0) as? SidebarCell
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}
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func availableSidebarCells() -> [SidebarCell] {
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var cells = [SidebarCell]()
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outlineView.enumerateAvailableRowViews { (rowView: NSTableRowView, _: Int) -> Void in
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if let cell = cellForRowView(rowView) {
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cells += [cell]
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}
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}
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return cells
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}
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func configureAvailableCells() {
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outlineView.enumerateAvailableRowViews { (rowView: NSTableRowView, row: Int) -> Void in
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guard let cell = cellForRowView(rowView), let node = nodeForRow(row) else {
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return
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}
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configure(cell, node)
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}
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}
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func cellsForRepresentedObject(_ representedObject: AnyObject) -> [SidebarCell] {
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let availableCells = availableSidebarCells()
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return availableCells.filter{ (oneSidebarCell) -> Bool in
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guard let oneNode = oneSidebarCell.objectValue as? Node else {
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return false
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}
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return oneNode.representedObject === representedObject
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}
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}
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@discardableResult
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func configureCellsForRepresentedObject(_ representedObject: AnyObject) -> Bool {
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// Return true if any cells were configured.
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let cells = cellsForRepresentedObject(representedObject)
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if cells.isEmpty {
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return false
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}
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cells.forEach { (oneSidebarCell) in
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guard let oneNode = oneSidebarCell.objectValue as? Node else {
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return
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}
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configure(oneSidebarCell, oneNode)
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oneSidebarCell.needsDisplay = true
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oneSidebarCell.needsLayout = true
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}
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return true
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}
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@discardableResult
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func revealAndSelectRepresentedObject(_ representedObject: AnyObject) -> Bool {
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return outlineView.revealAndSelectRepresentedObject(representedObject, treeController)
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}
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func folderParentForNode(_ node: Node) -> Container? {
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if let folder = node.parent?.representedObject as? Container {
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return folder
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}
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if let feed = node.representedObject as? Feed {
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return feed.account
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}
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if let folder = node.representedObject as? Folder {
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return folder.account
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}
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return nil
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}
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func deleteItemForNode(_ node: Node) {
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// if let folder = folderParentForNode(node) {
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// folder.deleteItems([node.representedObject])
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// }
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}
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func deleteItemsForNodes(_ nodes: [Node]) {
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nodes.forEach { (oneNode) in
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deleteItemForNode(oneNode)
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}
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}
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}
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