add paste right-click option to the Add Contact form. GitHub issue #85

gui/griffon-app/i18n/messages.properties

@@ -634,6 +634,7 @@ ADD_CONTACT_TITLE=Add a new contact
 ADD_CONTACT_BODY=Copy-paste the full MuWire ID of your new contact below.
 ADD_CONTACT_INVALID_ID_TITLE=Invalid full MuWire ID
 ADD_CONTACT_INVALID_ID_BODY=You have entered an invalid full MuWire ID.
+PASTE=Paste
 
 ## My Feed dialog
 MY_FEED=My Feed

gui/griffon-app/views/com/muwire/gui/AddContactView.groovy

@@ -2,7 +2,11 @@ package com.muwire.gui
 
 import griffon.core.artifact.GriffonView
 
+import javax.swing.JMenuItem
+import javax.swing.JPopupMenu
 import java.awt.event.ActionListener
+import java.awt.event.MouseAdapter
+import java.awt.event.MouseEvent
 
 import static com.muwire.gui.Translator.trans
 
@@ -64,6 +68,39 @@ class AddContactView {
                 }
             }
         }
+        
+        idArea.addMouseListener(new MouseAdapter() {
+            @Override
+            void mousePressed(MouseEvent e) {
+                if (!CopyPasteSupport.canPasteString())
+                    return
+                if (e.isPopupTrigger() || e.button == MouseEvent.BUTTON3)
+                    showPopupMenu(e)
+            }
+
+            @Override
+            void mouseReleased(MouseEvent e) {
+                if (!CopyPasteSupport.canPasteString())
+                    return
+                if (e.isPopupTrigger() || e.button == MouseEvent.BUTTON3)
+                    showPopupMenu(e)
+            }
+        })
+    }
+    
+    private void showPopupMenu(MouseEvent event) {
+        JPopupMenu menu = new JPopupMenu()
+        JMenuItem paste = new JMenuItem(trans("PASTE"))
+        paste.addActionListener({doPaste()})
+        menu.add(paste)
+        menu.show(event.getComponent(), event.getX(), event.getY())
+    }
+    
+    private void doPaste() {
+        String contents = CopyPasteSupport.pasteFromClipboard()
+        if (contents == null)
+            return
+        idArea.setText(contents)
     }
     
     void mvcGroupInit(Map<String,String> args) {

gui/src/main/java/com/muwire/gui/CopyPasteSupport.java

@@ -3,6 +3,9 @@ package com.muwire.gui;
 import java.awt.Toolkit;
 import java.awt.datatransfer.DataFlavor;
 import java.awt.datatransfer.StringSelection;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.IOException;
+import java.io.InputStream;
 
 public class CopyPasteSupport {
 
@@ -21,4 +24,24 @@ public class CopyPasteSupport {
         StringSelection selection = new StringSelection(str);
         Toolkit.getDefaultToolkit().getSystemClipboard().setContents(selection, null);
     }
+
+    /**
+     * @return what's in the clipboard if it can be represented as a string.  This does not handle multi-byte characters. 
+     */
+    public static String pasteFromClipboard() {
+        try {
+            InputStream is = (InputStream)Toolkit.getDefaultToolkit().getSystemClipboard().getData(DataFlavor.getTextPlainUnicodeFlavor());
+            StringBuilder sb = new StringBuilder();
+            int b;
+            while ((b = is.read()) >= 0)
+                sb.append((char)b);
+            return sb.toString();
+        } catch (UnsupportedFlavorException| IOException e) {
+            return null;
+        }
+    }
+    
+    public static boolean canPasteString() {
+        return Toolkit.getDefaultToolkit().getSystemClipboard().isDataFlavorAvailable(DataFlavor.getTextPlainUnicodeFlavor());
+    }
 }