Add functionality for inserting content into clipboard & add functionality to start/stop listening

src/main/java/me/goudham/MacClipboardListener.java

@@ -2,6 +2,7 @@ package me.goudham;
 
 import java.awt.Dimension;
 import java.awt.Image;
+import java.awt.datatransfer.StringSelection;
 import java.awt.datatransfer.Transferable;
 import java.awt.image.BufferedImage;
 import java.io.File;
@@ -11,7 +12,10 @@ import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
 import me.goudham.domain.MyClipboardContent;
 import me.goudham.domain.OldClipboardContent;
+import me.goudham.domain.TransferableFileList;
+import me.goudham.domain.TransferableImage;
 
+import static java.lang.Thread.sleep;
 import static me.goudham.ClipboardUtils.getFileContent;
 import static me.goudham.ClipboardUtils.getImageContent;
 import static me.goudham.ClipboardUtils.getStringContent;
@@ -19,9 +23,15 @@ import static me.goudham.domain.Contents.FILELIST;
 import static me.goudham.domain.Contents.IMAGE;
 import static me.goudham.domain.Contents.TEXT;
 
-class MacClipboardListener extends ClipboardListener {
+class MacClipboardListener extends ClipboardListener implements Runnable {
+    ScheduledExecutorService scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
+    MyClipboardContent<?>[] myClipboardContents;
+    private boolean listening = false;
 
-    MacClipboardListener() {}
+    MacClipboardListener() {
+        Transferable oldClipboardContents = clipboard.getContents(null);
+        myClipboardContents = new MyClipboardContent[] { ClipboardUtils.getClipboardContents(oldClipboardContents, clipboard) };
+    }
 
     /**
      * Checks if {@link String} is within the clipboard and changed
@@ -30,18 +40,20 @@ class MacClipboardListener extends ClipboardListener {
      * @param myClipboardContents  {@link MyClipboardContent[]} of Unknown {@link Class} containing previous contents
      */
     void checkText(Transferable newClipboardContents, MyClipboardContent<?>[] myClipboardContents) {
-        if (isTextMonitored()) {
         if (TEXT.isAvailable(clipboard) && !FILELIST.isAvailable(clipboard)) {
             String newStringContent = getStringContent(newClipboardContents);
             if (newStringContent == null) return;
 
+            if (isTextMonitored()) {
                 Object oldContent = myClipboardContents[0].getOldContent();
                 if (!newStringContent.equals(oldContent)) {
                     OldClipboardContent oldClipboardContent = ClipboardUtils.getOldClipboardContent(oldContent);
                     getEventManager().notifyTextEvent(oldClipboardContent, newStringContent);
-                    myClipboardContents[0].setOldContent(newStringContent);
                 }
             }
+
+            myClipboardContents[0].setOldContent(newStringContent);
+            myClipboardContents[0].setOldDimensionContent(newStringContent);
         }
     }
 
@@ -52,19 +64,20 @@ class MacClipboardListener extends ClipboardListener {
      * @param myClipboardContents  {@link MyClipboardContent[]} of Unknown {@link Class} containing previous contents
      */
     void checkImages(Transferable newClipboardContents, MyClipboardContent<?>[] myClipboardContents) {
-        if (isImageMonitored()) {
         if (IMAGE.isAvailable(clipboard)) {
             BufferedImage bufferedImageContent = getImageContent(newClipboardContents);
             if (bufferedImageContent == null) return;
-
             Dimension newDimensionContent = new Dimension(bufferedImageContent.getWidth(), bufferedImageContent.getHeight());
+
+            if (isImageMonitored()) {
                 if (!newDimensionContent.equals(myClipboardContents[0].getOldDimensionContent())) {
                     OldClipboardContent oldClipboardContent = ClipboardUtils.getOldClipboardContent(myClipboardContents[0].getOldContent());
                     getEventManager().notifyImageEvent(oldClipboardContent, bufferedImageContent);
-                    myClipboardContents[0].setOldContent(bufferedImageContent);
-                    myClipboardContents[0].setOldDimensionContent(newDimensionContent);
                 }
             }
+
+            myClipboardContents[0].setOldContent(bufferedImageContent);
+            myClipboardContents[0].setOldDimensionContent(newDimensionContent);
         }
     }
 
@@ -76,76 +89,112 @@ class MacClipboardListener extends ClipboardListener {
      * @param myClipboardContents  {@link MyClipboardContent[]} of Unknown {@link Class} containing previous contents
      */
     void checkFiles(Transferable newClipboardContents, MyClipboardContent<?>[] myClipboardContents) {
-        if (isFileMonitored()) {
         if (FILELIST.isAvailable(clipboard)) {
             List<File> fileListContent = getFileContent(newClipboardContents);
             if (fileListContent == null) return;
 
+            if (isFileMonitored()) {
                 if (!fileListContent.equals(myClipboardContents[0].getOldContent())) {
                     OldClipboardContent oldClipboardContent = ClipboardUtils.getOldClipboardContent(myClipboardContents[0].getOldContent());
                     getEventManager().notifyFilesEvent(oldClipboardContent, fileListContent);
-                    myClipboardContents[0].setOldContent(fileListContent);
                 }
             }
+
+            myClipboardContents[0].setOldContent(fileListContent);
+            myClipboardContents[0].setOldContent(fileListContent);
         }
     }
 
+    @Override
+    void startListening() {
+        if (!listening) {
+            listening = true;
+            execute();
+        }
+    }
 
-    /**
-     * Main entry point for {@link MacClipboardListener}
-     * <p>Retrieves thread from {@link Executors#newSingleThreadScheduledExecutor()} and executes code on a fixed delay</p>
-     */
     @Override
-    void execute() {
-        Transferable oldClipboardContents = clipboard.getContents(null);
-        final MyClipboardContent<?>[] myClipboardContents = new MyClipboardContent[] { ClipboardUtils.getClipboardContents(oldClipboardContents, clipboard) };
+    void stopListening() {
+        if (listening) {
+            scheduledExecutorService.shutdown();
+            scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
 
-        ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
-        executor.scheduleAtFixedRate(() -> {
-            Transferable newClipboardContents = clipboard.getContents(null);
-            checkText(newClipboardContents, myClipboardContents);
-            checkImages(newClipboardContents, myClipboardContents);
-            checkFiles(newClipboardContents, myClipboardContents);
-        }, 0, 350, TimeUnit.MILLISECONDS);
+            try {
+                sleep(200);
+            } catch (InterruptedException ie) {
+                ie.printStackTrace();
             }
 
-    @Override
-    void insert(String stringComponent) {
+            listening = false;
+        }
+    }
 
+    @Override
+    void insert(String stringContent) {
+        insertAndNotify(stringContent);
     }
 
     @Override
     void insert(Image imageContent) {
-
+        insertAndNotify(imageContent);
     }
 
     @Override
     void insert(List<File> fileContent) {
-
+        insertAndNotify(fileContent);
     }
 
     @Override
     void insertAndNotify(String stringContent) {
+        try {
+            sleep(200);
+        } catch (InterruptedException ie) {
+            ie.printStackTrace();
+        }
 
+        clipboard.setContents(new StringSelection(stringContent), null);
     }
 
     @Override
     void insertAndNotify(Image imageContent) {
+        try {
+            sleep(200);
+        } catch (InterruptedException ie) {
+            ie.printStackTrace();
+        }
 
+        clipboard.setContents(new TransferableImage(imageContent), null);
     }
 
     @Override
     void insertAndNotify(List<File> fileContent) {
+        try {
+            sleep(200);
+        } catch (InterruptedException ie) {
+            ie.printStackTrace();
+        }
 
+        clipboard.setContents(new TransferableFileList(fileContent), null);
     }
 
     @Override
-    void startListening() {
-
+    public void run() {
+        try {
+            Transferable newClipboardContents = clipboard.getContents(null);
+            checkText(newClipboardContents, myClipboardContents);
+            checkImages(newClipboardContents, myClipboardContents);
+            checkFiles(newClipboardContents, myClipboardContents);
+        } catch (IllegalStateException ise) {
+            ise.printStackTrace();
+        }
     }
 
+    /**
+     * Main entry point for {@link MacClipboardListener}
+     * <p>Retrieves thread from {@link Executors#newSingleThreadScheduledExecutor()} and executes code on a fixed delay</p>
+     */
     @Override
-    void stopListening() {
-
+    void execute() {
+        scheduledExecutorService.scheduleAtFixedRate(this, 0, 200, TimeUnit.MILLISECONDS);
     }
 }