Add support for tracking if the Podfile has been edited in another app (Issue 114)

app/CocoaPods/CPPodfileEditorViewController.swift

@@ -39,6 +39,8 @@ class CPPodfileEditorViewController: NSViewController, NSTextViewDelegate, SMLAu
     guard let podfileVC = podfileViewController, project = podfileVC.userProject else {
       return print("CPPodfileEditorViewController is not set up with a PodfileVC in the VC heirarchy.")
     }
+
+    project.delegate = self
 
     editor.syntaxColoured = true
     editor.syntaxDefinitionName = "Podfile"
@@ -255,3 +257,14 @@ extension EditorLineSelection {
   }
 
 }
+
+// MARK: - CPUserProjectDelegate
+extension CPPodfileEditorViewController: CPUserProjectDelegate {
+
+  func contentDidChangeinUserProject(userProject: CPUserProject) {
+    editor.string = userProject.contents
+
+    // Passing the message on to the syntax checker
+    syntaxChecker.textDidChange(NSNotification(name: "", object: nil))
+  }
+}

app/CocoaPods/CPUserProject.h

@@ -9,8 +9,18 @@ NS_ASSUME_NONNULL_BEGIN
 /// the job of actually representing the Podfile and it's
 /// metadata is handled by `CPPodfile` from CocoaPods-ObjC
 
+@class CPUserProject;
+
+@protocol CPUserProjectDelegate <NSObject>
+
+- (void)contentDidChangeinUserProject:(CPUserProject *)userProject;
+
+@end
+
 @interface CPUserProject : NSDocument
 
+@property (nonatomic, weak) id<CPUserProjectDelegate> delegate;
+
 /// The raw string content of the Podfile
 @property (strong) NSString * contents;
 

app/CocoaPods/CPUserProject.m

@@ -65,4 +65,21 @@ - (void)setPodfilePlugins:(NSArray<NSString *> *)podfilePlugins
   [self.completionPromise checkForFulfillment];
 }
 
+#pragma mark - NSFilePresenter
+
+- (void)presentedItemDidChange
+{
+  NSError *error;
+  [self readFromURL:self.fileURL ofType:self.fileType error:&error];
+
+  if (!error) {
+    if ( [self.delegate respondsToSelector: @selector(contentDidChangeinUserProject:)] ) {
+      dispatch_async(dispatch_get_main_queue(), ^{
+        [self.delegate contentDidChangeinUserProject:self];
+      });
+    }
+  }
+
+}
+
 @end