| /* |
| * Copyright (c) 2000, 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. |
| * |
| * 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.jvm.hotspot.ui; |
| |
| import javax.swing.text.*; |
| |
| /** This class implements a special type of document in which edits |
| can only be performed at the end, from "mark" to the end of the |
| document. Thanks to Scott Violet for suggesting to subclass a |
| Document implementation for this purpose. (Can't do it with |
| DocumentEvents or UndoableEditEvents; however, in 1.4, there will |
| be a DocumentFilter which will allow this kind of functionality.) */ |
| |
| public class EditableAtEndDocument extends PlainDocument { |
| private int mark; |
| |
| public void insertString(int offset, String text, AttributeSet a) |
| throws BadLocationException { |
| int len = getLength(); |
| super.insertString(len, text, a); |
| } |
| |
| public void remove(int offs, int len) throws BadLocationException { |
| int start = offs; |
| int end = offs + len; |
| |
| int markStart = mark; |
| int markEnd = getLength(); |
| |
| if ((end < markStart) || (start > markEnd)) { |
| // no overlap |
| return; |
| } |
| |
| // Determine interval intersection |
| int cutStart = Math.max(start, markStart); |
| int cutEnd = Math.min(end, markEnd); |
| super.remove(cutStart, cutEnd - cutStart); |
| } |
| |
| public void setMark() { |
| mark = getLength(); |
| } |
| |
| public String getMarkedText() throws BadLocationException { |
| return getText(mark, getLength() - mark); |
| } |
| |
| /** Used to reset the contents of this document */ |
| public void clear() { |
| try { |
| super.remove(0, getLength()); |
| setMark(); |
| } |
| catch (BadLocationException e) { |
| } |
| } |
| } |