Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/ui/EditableAtEndDocument.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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/* * Copyright 2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.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) { } } }