package org.underworldlabs.swing.plaf.base;import java.awt.Rectangle;import java.awt.Shape;import javax.swing.JComponent;import javax.swing.UIManager;import javax.swing.plaf.ComponentUI;import javax.swing.plaf.basic.BasicTextPaneUI;import javax.swing.text.AbstractDocument;import javax.swing.text.BadLocationException;import javax.swing.text.DefaultHighlighter;import javax.swing.text.Document;import javax.swing.text.Highlighter;import javax.swing.text.JTextComponent;import javax.swing.text.Position;import javax.swing.text.View;/* * CustomTextPaneUI.java * * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. * *//** * An alternative UI delegate for JTextArea that paints the * selection highlight correctly.  For example, when a selection * starts on one line and ends on the next, the highlight on the * first line will extend all the way to the right margin. * * @author Alan Moore *//** * * @author   Takis Diakoumis * @version  $Revision: 1.4 $ * @date     $Date: 2006/05/14 06:56:07 $ */public class CustomTextPaneUI extends BasicTextPaneUI {    /**     * Informs the UIManager that this class should be used as the UI     * delegate for JTextArea's.  This method should be called during     * app initialization, before any components are created.     */    public static void initialize() {        String key = "TextPaneUI";        Class cls = CustomTextPaneUI.class;        String name = cls.getName();        UIManager.put(key, name);        UIManager.put(name, cls);    }        /**     * Creates a UI for a JTextPane.     *     * @param c a text area     * @return a CustomTextAreaUI instance     */    public static ComponentUI createUI(JComponent c) {        return new CustomTextPaneUI();    }        /**     * Creates the object to use for adding highlights.  This will     * be a non-layered version of DefaultHighlighter, so that     * multi-line selections will be painted properly.     *     * @return the highlighter     */    protected Highlighter createHighlighter() {        DefaultHighlighter h = new DefaultHighlighter();        h.setDrawsLayeredHighlights(false);        return h;    }        /**     * Causes the portion of the view responsible for the given part     * of the model to be repainted. This is overridden to repaint the     * whole width of the textarea, so that selection highlighting will     * be rendered properly.     *     * @param p0 the beginning of the range >= 0     * @param p1 the end of the range >= p0     */    public void damageRange(JTextComponent t, int p0, int p1,    Position.Bias p0Bias, Position.Bias p1Bias) {        View rv = getRootView(t);        Rectangle alloc = getVisibleEditorRect();        Document doc = t.getDocument();        if (rv != null && alloc != null && doc != null) {            if (doc instanceof AbstractDocument) {                ((AbstractDocument)doc).readLock();            }            try {                rv.setSize(alloc.width, alloc.height);                Shape toDamage = rv.modelToView(p0, p0Bias, p1, p1Bias, alloc);                Rectangle rect = (toDamage instanceof Rectangle)                ? (Rectangle)toDamage                : toDamage.getBounds();                t.repaint(alloc.x, rect.y, alloc.width, rect.height);            }            catch (BadLocationException ex) {}            finally {                if (doc instanceof AbstractDocument) {                    ((AbstractDocument)doc).readUnlock();                }            }        }    }}