macos: terminal surface view

macos/Ghostty.xcodeproj/project.pbxproj

@@ -7,6 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		A507573E299FF33C009D7DC7 /* TerminalSurfaceView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A507573D299FF33C009D7DC7 /* TerminalSurfaceView.swift */; };
 		A535B9DA299C569B0017E2E4 /* ErrorView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A535B9D9299C569B0017E2E4 /* ErrorView.swift */; };
 		A5B30535299BEAAA0047F10C /* GhosttyApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5B30534299BEAAA0047F10C /* GhosttyApp.swift */; };
 		A5B30537299BEAAA0047F10C /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5B30536299BEAAA0047F10C /* ContentView.swift */; };
@@ -15,6 +16,7 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		A507573D299FF33C009D7DC7 /* TerminalSurfaceView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TerminalSurfaceView.swift; sourceTree = "<group>"; };
 		A535B9D9299C569B0017E2E4 /* ErrorView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ErrorView.swift; sourceTree = "<group>"; };
 		A5B30531299BEAAA0047F10C /* Ghostty.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Ghostty.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		A5B30534299BEAAA0047F10C /* GhosttyApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GhosttyApp.swift; sourceTree = "<group>"; };
@@ -43,6 +45,7 @@
 				A5B30534299BEAAA0047F10C /* GhosttyApp.swift */,
 				A5B30536299BEAAA0047F10C /* ContentView.swift */,
 				A535B9D9299C569B0017E2E4 /* ErrorView.swift */,
+				A507573D299FF33C009D7DC7 /* TerminalSurfaceView.swift */,
 			);
 			path = Sources;
 			sourceTree = "<group>";
@@ -150,6 +153,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				A507573E299FF33C009D7DC7 /* TerminalSurfaceView.swift in Sources */,
 				A5B30537299BEAAA0047F10C /* ContentView.swift in Sources */,
 				A535B9DA299C569B0017E2E4 /* ErrorView.swift in Sources */,
 				A5B30535299BEAAA0047F10C /* GhosttyApp.swift in Sources */,

macos/Sources/GhosttyApp.swift

@@ -20,7 +20,7 @@ struct GhosttyApp: App {
             case .error:
                 ErrorView()
             case .ready:
-                ContentView()
+                TerminalSurfaceView()
             }
         }
     }

macos/Sources/TerminalSurfaceView.swift

@@ -0,0 +1,59 @@
+import SwiftUI
+
+/// A surface is terminology in Ghostty for a terminal surface, or a place where a terminal is actually drawn
+/// and interacted with. The word "surface" is used because a surface may represent a window, a tab,
+/// a split, a small preview pane, etc. It is ANYTHING that has a terminal drawn to it.
+///
+/// We just wrap an AppKit NSView here at the moment so that we can behave as low level as possible
+/// since that is what the Metal renderer in Ghostty expects. In the future, it may make more sense to
+/// wrap an MTKView and use that, but for legacy reasons we didn't do that to begin with.
+struct TerminalSurfaceView: NSViewRepresentable {
+    @StateObject private var state = TerminalSurfaceState()
+    
+    func makeNSView(context: Context) -> TerminalSurfaceView_Real {
+        // We need the view as part of the state to be created previously because
+        // the view is sent to the Ghostty API so that it can manipulate it
+        // directly since we draw on a render thread.
+        return state.view;
+    }
+    
+    func updateNSView(_ view: TerminalSurfaceView_Real, context: Context) {
+        // Nothing we need to do here.
+    }
+}
+
+/// The state for the terminal surface view.
+class TerminalSurfaceState: ObservableObject {
+    var view: TerminalSurfaceView_Real;
+    
+    init() {
+        view = TerminalSurfaceView_Real()
+    }
+}
+
+// The actual NSView implementation for the terminal surface.
+class TerminalSurfaceView_Real: NSView {
+    // We need to support being a first responder so that we can get input events
+    override var acceptsFirstResponder: Bool { return true }
+    
+    override func draw(_ dirtyRect: NSRect) {
+        print("DRAW: \(dirtyRect)")
+        NSColor.green.setFill()
+        dirtyRect.fill()
+        super.draw(dirtyRect)
+    }
+    
+    override func mouseDown(with event: NSEvent) {
+        print("Mouse down: \(event)")
+    }
+    
+    override func keyDown(with event: NSEvent) {
+        print("Key down: \(event)")
+    }
+}
+
+struct TerminalSurfaceView_Previews: PreviewProvider {
+    static var previews: some View {
+        TerminalSurfaceView()
+    }
+}