Use stream for nvim view delegate methods

NvimView/NvimView/NvimView+Api.swift

@@ -197,7 +197,7 @@ extension NvimView {
 
   public func quitNeoVimWithoutSaving() {
     self.nvim.command(command: "qa!", expectsReturnValue: false)
-    self.delegate?.neoVimStopped()
+    self.eventsSubject.onNext(.neoVimStopped)
     self.waitForNeoVimToQuit()
   }
 

NvimView/NvimView/NvimView+UiBridge.swift

@@ -49,7 +49,7 @@ extension NvimView {
       self.markForRender(cellPosition: self.grid.position)
       self.grid.goto(position)
 
-      self.delegate?.cursor(to: textPosition)
+      self.eventsSubject.onNext(.cursor(textPosition))
     }
   }
 
@@ -77,7 +77,7 @@ extension NvimView {
       self.markForRender(region: self.grid.region)
       // Do not send msgs to agent -> neovim in the delegate method. It causes spinning
       // when you're opening a file with existing swap file.
-      self.delegate?.scroll()
+      self.eventsSubject.onNext(.scroll)
     }
   }
 
@@ -176,7 +176,7 @@ extension NvimView {
     gui.async {
       self.bridgeLogger.debug(title)
 
-      self.delegate?.set(title: title)
+      self.eventsSubject.onNext(.setTitle(title))
     }
   }
 
@@ -187,7 +187,7 @@ extension NvimView {
 
     gui.async {
       self.waitForNeoVimToQuit()
-      self.delegate?.neoVimStopped()
+      self.eventsSubject.onNext(.neoVimStopped)
     }
   }
 
@@ -200,7 +200,7 @@ extension NvimView {
       }
 
       if event == .TABENTER {
-        self.tabChanged()
+        self.eventsSubject.onNext(.tabChanged)
       }
 
       if event == .BUFWRITEPOST {
@@ -221,7 +221,7 @@ extension NvimView {
         return
       }
 
-      self.delegate?.ipcBecameInvalid(reason: reason)
+      self.eventsSubject.onNext(.ipcBecameInvalid(reason))
 
       self.bridgeLogger.error("Force-closing due to IPC error.")
       self.nvim.disconnect()
@@ -246,7 +246,7 @@ extension NvimView {
       self.bridgeLogger.debug(cwd)
 
       self._cwd = URL(fileURLWithPath: cwd)
-      self.cwdChanged()
+      self.eventsSubject.onNext(.cwdChanged)
     }
   }
   public func colorSchemeChanged(_ values: [NSNumber]) {
@@ -255,7 +255,7 @@ extension NvimView {
       self.bridgeLogger.debug(theme)
 
       self.theme = theme
-      self.delegate?.colorschemeChanged(to: theme)
+      self.eventsSubject.onNext(.colorschemeChanged(theme))
     }
   }
 
@@ -263,7 +263,7 @@ extension NvimView {
     gui.async {
       self.bridgeLogger.debug(dirty)
 
-      self.delegate?.set(dirtyStatus: dirty)
+      self.eventsSubject.onNext(.setDirtyStatus(dirty))
     }
   }
 
@@ -367,7 +367,7 @@ extension NvimView {
         return buffer
       }
       .subscribe(onSuccess: {
-        self.delegate?.bufferWritten($0)
+        self.eventsSubject.onNext(.bufferWritten($0))
         if #available(OSX 10.12.2, *) {
           self.updateTouchBarTab()
         }
@@ -379,23 +379,15 @@ extension NvimView {
       .currentBuffer()
       .filter { $0.apiBuffer.handle == handle }
       .subscribe(onSuccess: {
-        self.delegate?.newCurrentBuffer($0)
+        self.eventsSubject.onNext(.newCurrentBuffer($0))
         if #available(OSX 10.12.2, *) {
           self.updateTouchBarTab()
         }
       })
   }
 
-  fileprivate func tabChanged() {
-    self.delegate?.tabChanged()
-  }
-
-  fileprivate func cwdChanged() {
-    self.delegate?.cwdChanged()
-  }
-
   fileprivate func bufferListChanged() {
-    self.delegate?.bufferListChanged()
+    self.eventsSubject.onNext(.bufferListChanged)
     if #available(OSX 10.12.2, *) {
       self.updateTouchBarCurrentBuffer()
     }

NvimView/NvimView/NvimView.swift

@@ -81,7 +81,6 @@ public class NvimView: NSView,
   public static let maxLinespacing = CGFloat(8)
 
   public let uuid = UUID().uuidString
-  public weak var delegate: NvimViewDelegate?
 
   public internal(set) var mode = CursorModeShape.normal
 
@@ -155,6 +154,10 @@ public class NvimView: NSView,
 
   public internal(set) var currentPosition = Position.beginning
 
+  public var events: Observable<NvimViewEvent> {
+    return self.eventsSubject.asObservable()
+  }
+
   public init(frame rect: NSRect, config: Config) {
     self.drawer = TextDrawer(font: self._font)
     self.uiClient = UiClient(uuid: self.uuid)
@@ -257,6 +260,8 @@ public class NvimView: NSView,
 
   var nvimApiScheduler = SerialDispatchQueueScheduler(qos: .userInitiated)
 
+  let eventsSubject = PublishSubject<NvimViewEvent>()
+
   // MARK: - Private
-  fileprivate var _linespacing = NvimView.defaultLinespacing
+  private var _linespacing = NvimView.defaultLinespacing
 }

NvimView/NvimView/NvimViewDelegate.swift

@@ -5,23 +5,22 @@
 
 import Cocoa
 
-// See http://stackoverflow.com/a/24104371 for class
+public enum NvimViewEvent {
-public protocol NvimViewDelegate: class {
 
-  func neoVimStopped()
+  case neoVimStopped
-  func set(title: String)
+  case setTitle(String)
-  func set(dirtyStatus: Bool)
+  case setDirtyStatus(Bool)
-  func cwdChanged()
+  case cwdChanged
-  func bufferListChanged()
+  case bufferListChanged
-  func tabChanged()
+  case tabChanged
-  /// Called when the current buffer changes, including when a new one is selected.
+  
-  func newCurrentBuffer(_ currentBuffer: NvimView.Buffer)
+  case newCurrentBuffer(NvimView.Buffer)
-  func bufferWritten(_ buffer: NvimView.Buffer)
+  case bufferWritten(NvimView.Buffer)
 
-  func colorschemeChanged(to: NvimView.Theme)
+  case colorschemeChanged(NvimView.Theme)
 
-  func ipcBecameInvalid(reason: String)
+  case ipcBecameInvalid(String)
 
-  func scroll()
+  case scroll
-  func cursor(to: Position)
+  case cursor(Position)
 }

VimR/VimR/MainWindow.swift

@@ -10,7 +10,6 @@ import PureLayout
 
 class MainWindow: NSObject,
                   UiComponent,
-                  NvimViewDelegate,
                   NSWindowDelegate,
                   NSUserInterfaceValidations,
                   WorkspaceDelegate {
@@ -200,7 +199,6 @@ class MainWindow: NSObject,
     self.addViews()
 
     self.updateNeoVimAppearance()
-    self.neoVimView.delegate = self
 
     self.open(urls: state.urlsToOpen)
 
@@ -215,6 +213,28 @@ class MainWindow: NSObject,
       })
       .disposed(by: self.disposeBag)
 
+    self.neoVimView.events
+      .observeOn(MainScheduler.instance)
+      .subscribe(onNext: { event in
+        switch event {
+
+        case .neoVimStopped: self.neoVimStopped()
+        case .setTitle(let title): self.set(title: title)
+        case .setDirtyStatus(let dirty): self.set(dirtyStatus: dirty)
+        case .cwdChanged: self.cwdChanged()
+        case .bufferListChanged: self.bufferListChanged()
+        case .tabChanged: self.tabChanged()
+        case .newCurrentBuffer(let curBuf): self.newCurrentBuffer(curBuf)
+        case .bufferWritten(let buf): self.bufferWritten(buf)
+        case .colorschemeChanged(let theme): self.colorschemeChanged(to: theme)
+        case .ipcBecameInvalid(let reason): self.ipcBecameInvalid(reason: reason)
+        case .scroll: self.scroll()
+        case .cursor(let position): self.cursor(to: position)
+
+        }
+      })
+      .disposed(by: self.disposeBag)
+
     source
       .observeOn(MainScheduler.instance)
       .subscribe(onNext: { state in