Open multiple documents per markdown file

MarkdownViewer/ContentView.swift

@@ -1,77 +1,34 @@
 import SwiftUI
-import UniformTypeIdentifiers
-import AppKit
 
 struct ContentView: View {
-    @State private var selectedFileURL: URL?
-    @State private var markdownContent: String = ""
+    var body: some View {
+        VStack {
+            Image(systemName: "doc.text")
+                .font(.system(size: 80))
+                .foregroundColor(.secondary)
+            Text("Markdown Viewer")
+                .font(.largeTitle)
+                .fontWeight(.medium)
+            Text("Open markdown files from the File menu")
+                .foregroundColor(.secondary)
+                .padding(.top, 8)
+            Text("⌘O")
+                .foregroundColor(.secondary)
+                .font(.caption)
+                .padding(.top, 4)
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+    }
+}
+
+struct MarkdownDocumentView: View {
+    let content: String
+    let fileName: String
     
     var body: some View {
-        NavigationSplitView {
-            VStack {
-                Button("Open Markdown File") {
-                    openFile()
-                }
-                .padding()
-                
-                if let url = selectedFileURL {
-                    Text("File: \(url.lastPathComponent)")
-                        .foregroundColor(.secondary)
-                        .font(.caption)
-                        .truncationMode(.middle)
-                        .padding(.horizontal)
-                }
-                
-                Spacer()
-            }
-            .frame(minWidth: 200)
-            .navigationSplitViewColumnWidth(min: 200, ideal: 250)
-        } detail: {
-            if !markdownContent.isEmpty {
-                MarkdownRenderer(content: markdownContent)
-                    .onAppear {
-                        print("MarkdownRenderer appeared with content length: \(markdownContent.count)")
-                    }
-            } else {
-                VStack {
-                    Image(systemName: "doc.text")
-                        .font(.system(size: 60))
-                        .foregroundColor(.secondary)
-                    Text("Select a markdown file to preview")
-                        .foregroundColor(.secondary)
-                        .padding()
-                }
-                .frame(maxWidth: .infinity, maxHeight: .infinity)
-            }
-        }
-        .navigationTitle("Markdown Viewer")
-    }
-    
-    private func openFile() {
-        let panel = NSOpenPanel()
-        panel.allowsMultipleSelection = false
-        panel.canChooseDirectories = false
-        panel.canChooseFiles = true
-        panel.allowedContentTypes = [UTType.plainText, UTType(filenameExtension: "md")!]
-        
-        if panel.runModal() == .OK {
-            if let url = panel.url {
-                selectedFileURL = url
-                loadMarkdownFile(from: url)
-            }
-        }
-    }
-    
-    private func loadMarkdownFile(from url: URL) {
-        do {
-            let content = try String(contentsOf: url, encoding: .utf8)
-            print("File loaded successfully, content length: \(content.count)")
-            print("First 100 characters: \(String(content.prefix(100)))")
-            markdownContent = content
-        } catch {
-            print("Error reading file: \(error)")
-            markdownContent = "Error loading file: \(error.localizedDescription)"
-        }
+        MarkdownRenderer(content: content)
+            .navigationTitle(fileName)
+            .frame(maxWidth: .infinity, maxHeight: .infinity)
     }
 }