JDK8/Java8源码在线阅读

/*
 * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.tools.jconsole;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;

@SuppressWarnings("serial")
public class HTMLPane extends JEditorPane {
    private boolean hasSelection = false;

    public HTMLPane() {
        setContentType("text/html");
        setEditable(false);
        ((DefaultCaret)getCaret()).setUpdatePolicy(DefaultCaret.NEVER_UPDATE);
        addCaretListener(new CaretListener() {
            // Listen for selection changes
            public void caretUpdate(CaretEvent e) {
                setHasSelection(e.getDot() != e.getMark());
            }
        });
    }

    public synchronized void setHasSelection(boolean b) {
        hasSelection = b;
    }

    public synchronized boolean getHasSelection() {
        return hasSelection;
    }

    public void setText(String text) {
        // Apply update only if a selection is not active
        if (!getHasSelection()) {

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