Merge 'paste images' support

Swift Coder (3):
      Allow-pasting-image-option
      Documenting
      Code optimization

damus/Views/PostView.swift

@@ -54,6 +54,8 @@ struct PostView: View {
     @State var error: String? = nil
     @State var uploadedMedias: [UploadedMedia] = []
     @State var image_upload_confirm: Bool = false
+    @State var imagePastedFromPasteboard: UIImage? = nil
+    @State var imageUploadConfirmPasteboard: Bool = false
     @State var references: [RefId] = []
     @State var filtered_pubkeys: Set<Pubkey> = []
     @State var focusWordAttributes: (String?, NSRange?) = (nil, nil)
@@ -246,7 +248,9 @@ struct PostView: View {
             TextViewWrapper(
                 attributedText: $post,
                 textHeight: $textHeight,
-                initialTextSuffix: initial_text_suffix, 
+                initialTextSuffix: initial_text_suffix,
+                imagePastedFromPasteboard: $imagePastedFromPasteboard,
+                imageUploadConfirmPasteboard: $imageUploadConfirmPasteboard,
                 cursorIndex: newCursorIndex,
                 getFocusWordForMention: { word, range in
                     focusWordAttributes = (word, range)
@@ -463,6 +467,16 @@ struct PostView: View {
                     self.attach_media = true
                 }
             }
+            // This alert seeks confirmation about Image-upload when user taps Paste option
+            .alert(NSLocalizedString("Are you sure you want to upload this media?", comment: "Alert message asking if the user wants to upload media."), isPresented: $imageUploadConfirmPasteboard) {
+                Button(NSLocalizedString("Upload", comment: "Button to proceed with uploading."), role: .none) {
+                    if let image = imagePastedFromPasteboard,
+                       let mediaToUpload = generateMediaUpload(PreUploadedMedia.uiimage(image)) {
+                        self.handle_upload(media: mediaToUpload)
+                    }
+                }
+                Button(NSLocalizedString("Cancel", comment: "Button to cancel the upload."), role: .cancel) {}
+            }
             .onAppear() {
                 let loaded_draft = load_draft()
                 

damus/Views/TextViewWrapper.swift

@@ -12,13 +12,16 @@ struct TextViewWrapper: UIViewRepresentable {
     @EnvironmentObject var tagModel: TagModel
     @Binding var textHeight: CGFloat?
     let initialTextSuffix: String?
+    @Binding var imagePastedFromPasteboard: UIImage?
+    @Binding var imageUploadConfirmPasteboard: Bool
     
     let cursorIndex: Int?
     var getFocusWordForMention: ((String?, NSRange?) -> Void)? = nil
     let updateCursorPosition: ((Int) -> Void)
     
     func makeUIView(context: Context) -> UITextView {
-        let textView = UITextView()
+        let textView = CustomPostTextView(imagePastedFromPasteboard: $imagePastedFromPasteboard,
+                                          imageUploadConfirm: $imageUploadConfirmPasteboard)
         textView.backgroundColor = UIColor(DamusColors.adaptableWhite)
         textView.delegate = context.coordinator
         
@@ -240,3 +243,36 @@ struct TextViewWrapper: UIViewRepresentable {
     }
 }
 
+class CustomPostTextView: UITextView {
+    @Binding var imagePastedFromPasteboard: UIImage?
+    @Binding var imageUploadConfirm: Bool
+    
+    // Custom initializer
+    init(imagePastedFromPasteboard: Binding<UIImage?>, imageUploadConfirm: Binding<Bool>) {
+        self._imagePastedFromPasteboard = imagePastedFromPasteboard
+        self._imageUploadConfirm = imageUploadConfirm
+        super.init(frame: .zero, textContainer: nil)
+    }
+    
+    required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") }
+
+    // Override canPerformAction to enable image pasting
+    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
+        if action == #selector(UIResponderStandardEditActions.paste(_:)),
+           UIPasteboard.general.image != nil {
+            return true // Show `Paste` option while long-pressing if there is an image present in the clipboard
+        }
+        return super.canPerformAction(action, withSender: sender) // Default behavior for other actions
+    }
+
+    // Override paste to handle image pasting
+    override func paste(_ sender: Any?) {
+        if let image = UIPasteboard.general.image {
+            imagePastedFromPasteboard = image
+            // Show alert view in PostView for Confirming upload
+            imageUploadConfirm = true
+        } else {
+            super.paste(sender) // Fall back to default paste behavior if no image
+        }
+    }
+}