javax.swing.text: static class: DefaultEditorKit.DeletePrevCharAction

javax.swing.text
static class: DefaultEditorKit.DeletePrevCharAction [javadoc | source]

java.lang.Object
   javax.swing.AbstractAction
      javax.swing.text.TextAction
         javax.swing.text.DefaultEditorKit$DeletePrevCharAction

All Implemented Interfaces:
Action, Cloneable, Serializable

Fields inherited from javax.swing.AbstractAction:
enabled, changeSupport

Constructor:
DeletePrevCharAction() { super(deletePrevCharAction); } Creates this object with the appropriate identifier.

Constructor:

 DeletePrevCharAction() {
            super(deletePrevCharAction);
}

Creates this object with the appropriate identifier.

Method from javax.swing.text.DefaultEditorKit$DeletePrevCharAction Summary:
actionPerformed

Methods from javax.swing.text.TextAction:
augmentList, getFocusedComponent, getTextComponent

Methods from javax.swing.AbstractAction:
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, hasSelectedKey, isEnabled, isSelected, putValue, removePropertyChangeListener, setEnabled, setEnabledFromAction, setToolTipTextFromAction, shouldReconfigure

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from javax.swing.text.DefaultEditorKit$DeletePrevCharAction Detail:
public void actionPerformed(ActionEvent e) { JTextComponent target = getTextComponent(e); boolean beep = true; if ((target != null) && (target.isEditable())) { try { Document doc = target.getDocument(); Caret caret = target.getCaret(); int dot = caret.getDot(); int mark = caret.getMark(); if (dot != mark) { doc.remove(Math.min(dot, mark), Math.abs(dot - mark)); beep = false; } else if (dot > 0) { int delChars = 1; if (dot > 1) { String dotChars = doc.getText(dot - 2, 2); char c0 = dotChars.charAt(0); char c1 = dotChars.charAt(1); if (c0 >= '\uD800" && c0 < = '\uDBFF" && c1 >= '\uDC00" && c1 < = '\uDFFF") { delChars = 2; } } doc.remove(dot - delChars, delChars); beep = false; } } catch (BadLocationException bl) { } } if (beep) { UIManager.getLookAndFeel().provideErrorFeedback(target); } } The operation to perform when this action is triggered.

Method from javax.swing.text.DefaultEditorKit$DeletePrevCharAction Detail:

 public  void actionPerformed(ActionEvent e) {
            JTextComponent target = getTextComponent(e);
            boolean beep = true;
            if ((target != null) && (target.isEditable())) {
                try {
                    Document doc = target.getDocument();
                    Caret caret = target.getCaret();
                    int dot = caret.getDot();
                    int mark = caret.getMark();
                    if (dot != mark) {
                        doc.remove(Math.min(dot, mark), Math.abs(dot - mark));
                        beep = false;
                    } else if (dot  > 0) {
                        int delChars = 1;
                        if (dot  > 1) {
                            String dotChars = doc.getText(dot - 2, 2);
                            char c0 = dotChars.charAt(0);
                            char c1 = dotChars.charAt(1);
                            if (c0  >= '\uD800" && c0 < = '\uDBFF" &&
                                c1  >= '\uDC00" && c1 < = '\uDFFF") {
                                delChars = 2;
                            }
                        }
                        doc.remove(dot - delChars, delChars);
                        beep = false;
                    }
                } catch (BadLocationException bl) {
                }
            }
            if (beep) {
                UIManager.getLookAndFeel().provideErrorFeedback(target);
            }
}

The operation to perform when this action is triggered.