Java JTextComponent Select toggleSelectionUpperCase(JTextComponent textPane)

Description

toggle Selection Upper Case

License

Apache License

Declaration

public static void toggleSelectionUpperCase(JTextComponent textPane) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import javax.swing.text.JTextComponent;

public class Main {
    public static void toggleSelectionUpperCase(JTextComponent textPane) {
        if (isSelectionUpperCase(textPane)) {
            selectionToLowerCase(textPane);
        } else {/*from  w  ww  .j a  va  2s  . c  o  m*/
            selectionToUpperCase(textPane);
        }
    }

    public static boolean isSelectionUpperCase(JTextComponent textPane) {
        String text = textPane.getSelectedText();
        byte[] bytes = text.getBytes();

        for (int i = 0; i < bytes.length; i++) {
            if (Character.isLowerCase((char) bytes[i])) {
                return false;
            }
        }

        return true;
    }

    public static void selectionToLowerCase(JTextComponent textPane) {
        int start = textPane.getSelectionStart();
        int end = textPane.getSelectionEnd();

        if (Math.abs(start - end) > 0) {
            String lower = textPane.getSelectedText().toLowerCase();
            textPane.replaceSelection(lower);

            textPane.setCaretPosition(start);
            textPane.moveCaretPosition(end);
        }
    }

    public static void selectionToUpperCase(JTextComponent textPane) {
        int start = textPane.getSelectionStart();
        int end = textPane.getSelectionEnd();

        if (Math.abs(start - end) > 0) {
            String upper = textPane.getSelectedText().toUpperCase();
            textPane.replaceSelection(upper);

            textPane.setCaretPosition(start);
            textPane.moveCaretPosition(end);
        }
    }
}

Related

1. selectAllOnFocus(JTextComponent textComponent)
2. selectAndRequestFocus(JTextComponent editor)
3. selectFirstArg(String strText, int initialSelectionStart, JTextComponent editor)
4. selectionToUpperCase(JTextComponent textPane)
5. selectLines(JTextComponent target)
6. useSelectedTextColor(Highlighter.Highlight h, JTextComponent c)