Java by API/javax.swing.text/Utilities

Utilities: getWordEnd(JTextComponent c, int offs)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.InputEvent; import java.awt.event.KeyEvent; import java.util.Hashtable; import javax.swing.Action; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.KeyStroke; import javax.swing.text.BadLocationException; import javax.swing.text.DefaultEditorKit; import javax.swing.text.Document; import javax.swing.text.JTextComponent; import javax.swing.text.Keymap; import javax.swing.text.TextAction; import javax.swing.text.Utilities; public class Main {

 public static void main(String[] args) {
   JTextArea area = new JTextArea(6, 32);
   Keymap parent = area.getKeymap();
   Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);
   KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U,
       InputEvent.CTRL_MASK);
   Action actionU = new UpWord();
   newmap.addActionForKeyStroke(u, actionU);
   Action actionList[] = area.getActions();
   Hashtable lookup = new Hashtable();
   for (int j = 0; j < actionList.length; j += 1)
     lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);
   KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L,
       InputEvent.CTRL_MASK);
   Action actionL = (Action) lookup.get(DefaultEditorKit.selectLineAction);
   newmap.addActionForKeyStroke(L, actionL);
   KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W,
       InputEvent.CTRL_MASK);
   Action actionW = (Action) lookup.get(DefaultEditorKit.selectWordAction);
   newmap.addActionForKeyStroke(W, actionW);
   area.setKeymap(newmap);
   JFrame f = new JFrame("KeymapExample");
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
   area.setText("This is a test.");
   f.pack();
   f.setVisible(true);
 }

} class UpWord extends TextAction {

 public UpWord() {
   super("uppercase-word-action");
 }
 public void actionPerformed(ActionEvent e) {
   JTextComponent comp = getTextComponent(e);
   if (comp == null)
     return;
   Document doc = comp.getDocument();
   int start = comp.getSelectionStart();
   int end = comp.getSelectionEnd();
   try {
     int left = Utilities.getWordStart(comp, start);
     int right = Utilities.getWordEnd(comp, end);
     String word = doc.getText(left, right - left);
     doc.remove(left, right - left);
     doc.insertString(left, word.toUpperCase(), null);
     comp.setSelectionStart(start);
      comp.setSelectionEnd(end);
   } catch (BadLocationException ble) {
     return;
   }
 }

}

 </source>
   
  
 
  

Utilities: getWordStart(JTextComponent c, int offs)

   <source lang="java">

import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.InputEvent; import java.awt.event.KeyEvent; import java.util.Hashtable; import javax.swing.Action; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.KeyStroke; import javax.swing.text.BadLocationException; import javax.swing.text.DefaultEditorKit; import javax.swing.text.Document; import javax.swing.text.JTextComponent; import javax.swing.text.Keymap; import javax.swing.text.TextAction; import javax.swing.text.Utilities; public class Main {

 public static void main(String[] args) {
   JTextArea area = new JTextArea(6, 32);
   Keymap parent = area.getKeymap();
   Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);
   KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U,
       InputEvent.CTRL_MASK);
   Action actionU = new UpWord();
   newmap.addActionForKeyStroke(u, actionU);
   Action actionList[] = area.getActions();
   Hashtable lookup = new Hashtable();
   for (int j = 0; j < actionList.length; j += 1)
     lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);
   KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L,
       InputEvent.CTRL_MASK);
   Action actionL = (Action) lookup.get(DefaultEditorKit.selectLineAction);
   newmap.addActionForKeyStroke(L, actionL);
   KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W,
       InputEvent.CTRL_MASK);
   Action actionW = (Action) lookup.get(DefaultEditorKit.selectWordAction);
   newmap.addActionForKeyStroke(W, actionW);
   area.setKeymap(newmap);
   JFrame f = new JFrame("KeymapExample");
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
   area.setText("This is a test.");
   f.pack();
   f.setVisible(true);
 }

} class UpWord extends TextAction {

 public UpWord() {
   super("uppercase-word-action");
 }
 public void actionPerformed(ActionEvent e) {
   JTextComponent comp = getTextComponent(e);
   if (comp == null)
     return;
   Document doc = comp.getDocument();
   int start = comp.getSelectionStart();
   int end = comp.getSelectionEnd();
   try {
     int left = Utilities.getWordStart(comp, start);
     int right = Utilities.getWordEnd(comp, end);
     String word = doc.getText(left, right - left);
     doc.remove(left, right - left);
     doc.insertString(left, word.toUpperCase(), null);
     comp.setSelectionStart(start);
      comp.setSelectionEnd(end);
   } catch (BadLocationException ble) {
     return;
   }
 }

}

 </source>