Adapt example app

NvimView/Sources/NvimView/NvimView.swift

@@ -171,7 +171,7 @@ public class NvimView: NSView,
         .subscribe()
         .disposed(by: db)
     }
-    self.tabBar?.reorderHandler = { [weak self] index, entry in
+    self.tabBar?.reorderHandler = { [weak self] index, _, _ in
       self?.api
         .command(command: "tabm \(index)")
         .subscribe()

Tabs/Sources/Tabs/Tab.swift

@@ -17,14 +17,17 @@ class Tab<Entry: TabRepresentative>: NSView {
   var title: String { self.tabRepresentative.title }
 
   var tabRepresentative: Entry {
-    willSet { if self.isSelected != newValue.isSelected { self.needsDisplay = true } }
+    willSet {
+      if self.isSelected == newValue.isSelected { return }
+      self.adjustToSelectionChange()
+      self.needsDisplay = true
+    }
     didSet {
-      if self.titleView.stringValue != self.title {
+      if self.titleView.stringValue == self.title { return }
       self.titleView.stringValue = self.title
       self.adjustWidth()
     }
   }
-  }
 
   init(withTabRepresentative tabRepresentative: Entry, in tabBar: TabBar<Entry>) {
     self.tabBar = tabBar
@@ -44,9 +47,7 @@ class Tab<Entry: TabRepresentative>: NSView {
     self.adjustWidth()
   }
 
-  override func mouseUp(with _: NSEvent) {
-    self.tabBar?.select(tab: self)
-  }
+  override func mouseUp(with _: NSEvent) { self.tabBar?.select(tab: self) }
 
   override func draw(_: NSRect) {
     self.drawSeparators()

Tabs/Sources/Tabs/TabBar.swift

@@ -14,7 +14,7 @@ public protocol TabRepresentative: Hashable {
 public class TabBar<Entry: TabRepresentative>: NSView {
   public var theme: Theme { self._theme }
   public var selectHandler: ((Int, Entry) -> Void)?
-  public var reorderHandler: ((Int, Entry) -> Void)?
+  public var reorderHandler: ((Int, Entry, [Entry]) -> Void)?
 
   public init(withTheme theme: Theme) {
     self._theme = theme
@@ -102,7 +102,11 @@ extension TabBar {
       if let draggedTab = draggedView as? Tab<Entry>,
          let indexOfDraggedTab = self.tabs.firstIndex(where: { $0 == draggedTab })
       {
-        self.reorderHandler?(indexOfDraggedTab, draggedTab.tabRepresentative)
+        self.reorderHandler?(
+          indexOfDraggedTab,
+          draggedTab.tabRepresentative,
+          self.tabs.map(\.tabRepresentative)
+        )
       }
 
       let endIndex = stackView.arrangedSubviews.endIndex - 1

Tabs/Support/TabsSupport/AppDelegate.swift

@@ -21,18 +21,40 @@ class AppDelegate: NSObject, NSApplicationDelegate {
   func applicationDidFinishLaunching(_: Notification) {
     let contentView = self.window.contentView!
     contentView.addSubview(self.tabBar)
-    self.tabBar.autoPinEdge(toSuperviewEdge: .top)
-    self.tabBar.autoPinEdge(toSuperviewEdge: .left)
-    self.tabBar.autoPinEdge(toSuperviewEdge: .right)
-    self.tabBar.autoSetDimension(.height, toSize: Theme().tabBarHeight)
-    self.tabBar.selectHandler = { _, entry in Swift.print("selected \(entry)") }
 
-    self.tabBar.update(tabRepresentatives: [
+    let tb = self.tabBar
+    tb.autoPinEdge(toSuperviewEdge: .top)
+    tb.autoPinEdge(toSuperviewEdge: .left)
+    tb.autoPinEdge(toSuperviewEdge: .right)
+    tb.autoSetDimension(.height, toSize: Theme().tabBarHeight)
+    tb.selectHandler = { [weak self] _, selectedEntry in
+      self?.tabEntries.enumerated().forEach { index, entry in
+        self?.tabEntries[index].isSelected = (entry == selectedEntry)
+      }
+      DispatchQueue.main.async {
+        Swift.print("select: \(self!.tabEntries)")
+        self?.tabBar.update(tabRepresentatives: self?.tabEntries ?? [])
+      }
+    }
+    tb.reorderHandler = { [weak self] index, reorderedEntry, entries in
+      self?.tabEntries = entries
+      self?.tabEntries.enumerated().forEach { index, entry in
+        self?.tabEntries[index].isSelected = (entry == reorderedEntry)
+      }
+      DispatchQueue.main.async {
+        Swift.print("reorder: \(entries)")
+        self?.tabBar.update(tabRepresentatives: self?.tabEntries ?? [])
+      }
+    }
+
+    self.tabEntries = [
       DummyTabEntry(title: "Test 1"),
       DummyTabEntry(title: "Test 2"),
       DummyTabEntry(title: "Test 3"),
       DummyTabEntry(title: "Very long long long title, and some more text!"),
-    ])
+    ]
+    self.tabEntries[0].isSelected = true
+    self.tabBar.update(tabRepresentatives: self.tabEntries)
   }
 
   func applicationWillTerminate(_: Notification) {
@@ -40,6 +62,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
   }
 
   private let tabBar: TabBar<DummyTabEntry>
+  private var tabEntries = [DummyTabEntry]()
 }
 
 struct DummyTabEntry: Hashable, TabRepresentative {