Pass through current buffer changed event to preview component

SwiftNeoVim/NeoVimView.swift

@@ -1436,9 +1436,7 @@ extension NeoVimView {
     }
 
     if event == .BUFREADPOST || event == .BUFWRITEPOST {
-      if self.currentBuffer()?.handle == bufferHandle {
-        self.currentBufferChanged()
-      }
+      self.currentBufferChanged(bufferHandle)
     }
   }
 
@@ -1455,9 +1453,17 @@ extension NeoVimView {
     }
   }
 
-  fileprivate func currentBufferChanged() {
+  fileprivate func currentBufferChanged(_ handle: Int) {
     DispatchUtils.gui {
-      self.delegate?.currentBufferChanged()
+      guard let currentBuffer = self.currentBuffer() else {
+        return
+      }
+
+      guard currentBuffer.handle == handle else {
+        return
+      }
+
+      self.delegate?.currentBufferChanged(currentBuffer)
     }
   }
 

SwiftNeoVim/NeoVimViewDelegate.swift

@@ -13,7 +13,7 @@ public protocol NeoVimViewDelegate: class {
   func set(dirtyStatus: Bool)
   func cwdChanged()
   func bufferListChanged()
-  func currentBufferChanged()
+  func currentBufferChanged(_ currentBuffer: NeoVimBuffer)
 
   func ipcBecameInvalid(reason: String)
 }

VimR.xcodeproj/project.pbxproj

@@ -1121,7 +1121,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "if [ \"${CONFIGURATION}\" = \"Debug\" ]; then ]\n    if [ -f \"SwiftNeoVim/NeoVimAutoCommandEvent.generated.h\" ]; then\n        exit 0\n    fi\nfi\n\nsed 's/^typedef enum auto_event/typedef NS_ENUM(NSUInteger, NeoVimAutoCommandEvent)/' <./neovim/build/include/auevents_enum.generated.h | sed 's/ event_T//' | sed 's/EVENT_/NeoVimAutoCommandEvent/' | sed 's/NUM_EVENTS/NumberOfAutoCommandEvents/' | sed -e '1s/^/@import Foundation;\\'$'\\n/' > SwiftNeoVim/NeoVimAutoCommandEvent.generated.h\n";
+			shellScript = "if [ \"${CONFIGURATION}\" = \"Debug\" ]; then\n    if [ -f \"SwiftNeoVim/NeoVimAutoCommandEvent.generated.h\" ]; then\n        exit 0\n    fi\nfi\n\nsed 's/^typedef enum auto_event/typedef NS_ENUM(NSUInteger, NeoVimAutoCommandEvent)/' <./neovim/build/include/auevents_enum.generated.h | sed 's/ event_T//' | sed 's/EVENT_/NeoVimAutoCommandEvent/' | sed 's/NUM_EVENTS/NumberOfAutoCommandEvents/' | sed -e '1s/^/@import Foundation;\\'$'\\n/' > SwiftNeoVim/NeoVimAutoCommandEvent.generated.h\n";
 		};
 		4BBA71F11D319E0900E16612 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;

VimR/MainWindowComponent.swift

@@ -15,6 +15,8 @@ enum MainWindowAction {
   case changeBufferList(mainWindow: MainWindowComponent, buffers: [NeoVimBuffer])
   case changeFileBrowserSelection(mainWindow: MainWindowComponent, url: URL)
   case close(mainWindow: MainWindowComponent, mainWindowPrefData: MainWindowPrefData)
+
+  case currentBufferChanged(mainWindow: MainWindowComponent, buffer: NeoVimBuffer)
 }
 
 struct MainWindowPrefData: StandardPrefData {
@@ -516,8 +518,8 @@ extension MainWindowComponent {
     self.publish(event: MainWindowAction.changeBufferList(mainWindow: self, buffers: buffers))
   }
 
-  func currentBufferChanged() {
-    NSLog("current buffer changed!!!")
+  func currentBufferChanged(_ currentBuffer: NeoVimBuffer) {
+    self.publish(event: MainWindowAction.currentBufferChanged(mainWindow: self, buffer: currentBuffer))
   }
 
   func ipcBecameInvalid(reason: String) {

VimR/MainWindowManager.swift

@@ -49,7 +49,7 @@ class MainWindowManager: StandardFlow {
         case let .close(mainWindow, mainWindowPrefData):
           self.close(mainWindow, prefData: mainWindowPrefData)
 
-        case .changeCwd, .changeBufferList, .changeFileBrowserSelection:
+        default:
           break;
         }
       })

VimR/PreviewComponent.swift

@@ -50,6 +50,19 @@ class PreviewComponent: ViewComponent {
   }
 
   override func subscription(source: Observable<Any>) -> Disposable {
-    return Disposables.create()
+    return source
+      .filter { $0 is MainWindowAction }
+      .map { $0 as! MainWindowAction }
+      .subscribe(onNext: { action in
+        switch action {
+
+        case let .currentBufferChanged(mainWindow, currentBuffer):
+          NSLog("\(currentBuffer)")
+
+        default:
+          return
+
+        }
+      })
   }
 }