1 /*
   2  * Copyright (c) 1998, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package javax.swing.text.html;
  26 
  27 import javax.swing.text.*;
  28 
  29 
  30 /**
  31  * TextAreaDocument extends the capabilities of the PlainDocument
  32  * to store the data that is initially set in the Document.
  33  * This is stored in order to enable an accurate reset of the
  34  * state when a reset is requested.
  35  *
  36  * @author Sunita Mani
  37  */
  38 
  39 class TextAreaDocument extends PlainDocument {
  40 
  41     String initialText;
  42 
  43 
  44     /**
  45      * Resets the model by removing all the data,
  46      * and restoring it to its initial state.
  47      */
  48     void reset() {
  49         try {
  50             remove(0, getLength());
  51             if (initialText != null) {
  52                 insertString(0, initialText, null);
  53             }
  54         } catch (BadLocationException e) {
  55         }
  56     }
  57 
  58     /**
  59      * Stores the data that the model is initially
  60      * loaded with.
  61      */
  62     void storeInitialText() {
  63         try {
  64             initialText = getText(0, getLength());
  65         } catch (BadLocationException e) {
  66         }
  67     }
  68 }