Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/ui/EditableAtEndDocument.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/ui/EditableAtEndDocument.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,80 @@ +/* + * 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) { + } + } +}