Example usage for javax.swing.text Caret getMark

Introduction

In this page you can find the example usage for javax.swing.text Caret getMark.

Prototype

public int getMark();

Source Link

Document

Fetches the current position of the mark.

Usage

From source file:org.domainmath.gui.MainFrame.java

public void deleteText() {
    RSyntaxTextArea textArea = commandArea;
    boolean beep = true;
    if ((textArea != null) && (textArea.isEditable())) {
        try {/*  www  .j ava 2 s  . c  om*/
            Document doc = textArea.getDocument();
            Caret caret = textArea.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 < doc.getLength()) {
                int delChars = 1;
                if (dot < doc.getLength() - 1) {
                    String dotChars = doc.getText(dot, 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);
                beep = false;
            }
        } catch (Exception bl) {
        }
    }

    if (beep) {
        UIManager.getLookAndFeel().provideErrorFeedback(textArea);
    }

    textArea.requestFocusInWindow();
}

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