Refactor listener class to copy images and strings (wip)

src/main/java/me/goudham/ClipboardListener.java

@@ -1,50 +1,64 @@
 package me.goudham;
 
+import me.goudham.listener.ClipboardEvent;
+import me.goudham.model.MyClipboardContent;
+import org.jetbrains.annotations.NotNull;
+
+import java.awt.Image;
 import java.awt.Toolkit;
-import java.awt.datatransfer.*;
+import java.awt.datatransfer.Clipboard;
+import java.awt.datatransfer.ClipboardOwner;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
 import java.io.IOException;
 
 public class ClipboardListener extends Thread implements ClipboardOwner {
+    private final Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
+    private @NotNull ClipboardEvent clipboardEvent;
 
-    public interface EntryListener {
-        void onCopy(String data);
+    public ClipboardListener(@NotNull ClipboardEvent clipboardEvent) {
+        this.clipboardEvent = clipboardEvent;
     }
 
-    private final Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
-    private EntryListener entryListener;
-
     @Override
-    public void lostOwnership(Clipboard c, Transferable t) {
+    public void lostOwnership(Clipboard oldClipboard, Transferable oldClipboardContents) {
         try {
             sleep(200);
         } catch (InterruptedException ignored) { }
 
-        Transferable contents = c.getContents(currentThread());
-        processContents(contents);
-        regainOwnership(c, contents);
+        Transferable newClipboardContents = oldClipboard.getContents(currentThread());
+        processContents(oldClipboard, newClipboardContents);
+        regainOwnership(oldClipboard, newClipboardContents);
     }
 
-    public void processContents(Transferable t) {
-        try {
-            String what = (String) (t.getTransferData(DataFlavor.stringFlavor));
+    public void processContents(Clipboard oldClipboard, Transferable newClipboardContents) {
+        MyClipboardContent<?> clipboardContent = null;
 
-            if (entryListener != null) {
-                entryListener.onCopy(what);
-            }
+        try {
+            if (oldClipboard.isDataFlavorAvailable(DataFlavor.stringFlavor)) {
+                    String stringContent = (String) newClipboardContents.getTransferData(DataFlavor.stringFlavor);
+                    clipboardContent = new MyClipboardContent<>(stringContent);
+                } else if (oldClipboard.isDataFlavorAvailable(DataFlavor.imageFlavor)) {
+                    Image imageContent = (Image) newClipboardContents.getTransferData(DataFlavor.imageFlavor);
+                    clipboardContent = new MyClipboardContent<>(imageContent);
+                }
         } catch (UnsupportedFlavorException | IOException ignored) { }
+
+        clipboardEvent.onCopy(clipboardContent);
     }
 
-    public void regainOwnership(Clipboard c, Transferable t) {
-        c.setContents(t, this);
+    public void regainOwnership(Clipboard clipboard, Transferable newClipboardContents) {
+        clipboard.setContents(newClipboardContents, this);
     }
 
     public void run() {
-        Transferable transferable = clipboard.getContents(currentThread());
-        processContents(transferable);
-        regainOwnership(clipboard, transferable);
+        Transferable currentClipboardContents = clipboard.getContents(currentThread());
+        processContents(clipboard, currentClipboardContents);
+        regainOwnership(clipboard, currentClipboardContents);
     }
 
-    public void setEntryListener(EntryListener entryListener) {
-        this.entryListener = entryListener;
+    public void setClipboardEvent(@NotNull ClipboardEvent clipboardEvent) {
+        this.clipboardEvent = clipboardEvent;
     }
 }