58 lines
1.3 KiB
Swift
58 lines
1.3 KiB
Swift
//
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// SidebarOutlineDataSource.swift
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// Evergreen
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//
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// Created by Brent Simmons on 2/12/18.
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// Copyright © 2018 Ranchero Software. All rights reserved.
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//
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import AppKit
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import RSTree
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import Articles
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import RSCore
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@objc final class SidebarOutlineDataSource: NSObject, NSOutlineViewDataSource {
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let treeController: TreeController
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init(treeController: TreeController) {
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self.treeController = treeController
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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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return (node.representedObject as? PasteboardWriterOwner)?.pasteboardWriter
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}
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}
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// MARK: - Private
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private extension SidebarOutlineDataSource {
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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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}
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