From b0fa81eea9a270f23d6ad67ca7a6d25c18d20da1 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Sat, 16 Jul 2005 01:27:14 +0000 Subject: Major merge with Classpath. Removed many duplicate files. * HACKING: Updated.x * classpath: Imported new directory. * standard.omit: New file. * Makefile.in, aclocal.m4, configure: Rebuilt. * sources.am: New file. * configure.ac: Run Classpath configure script. Moved code around to support. Disable xlib AWT peers (temporarily). * Makefile.am (SUBDIRS): Added 'classpath' (JAVAC): Removed. (AM_CPPFLAGS): Added more -I options. (BOOTCLASSPATH): Simplified. Completely redid how sources are built. Include sources.am. * include/Makefile.am (tool_include__HEADERS): Removed jni.h. * include/jni.h: Removed (in Classpath). * scripts/classes.pl: Updated to look at built classes. * scripts/makemake.tcl: New file. * testsuite/libjava.jni/jni.exp (gcj_jni_compile_c_to_so): Added -I options. (gcj_jni_invocation_compile_c_to_binary): Likewise. From-SVN: r102082 --- libjava/javax/swing/undo/StateEdit.java | 263 -------------------------------- 1 file changed, 263 deletions(-) delete mode 100644 libjava/javax/swing/undo/StateEdit.java (limited to 'libjava/javax/swing/undo/StateEdit.java') diff --git a/libjava/javax/swing/undo/StateEdit.java b/libjava/javax/swing/undo/StateEdit.java deleted file mode 100644 index 80e4e33..0000000 --- a/libjava/javax/swing/undo/StateEdit.java +++ /dev/null @@ -1,263 +0,0 @@ -/* StateEdit.java -- UndoableEdit for StateEditable implementations. - Copyright (C) 2002, 2003 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package javax.swing.undo; - -import java.util.Hashtable; -import java.util.Iterator; - -/** - * A helper class, making it easy to support undo and redo. - * - *

The following example shows how to use this class.

- * - * 
- * Foo foo; // class Foo implements {@link StateEditable}
- * StateEdit edit;
- *
- * edit = new StateEdit(foo, "Name Change");
- * foo.setName("Jane Doe");
- * edit.end();
- * undoManager.addEdit(edit);
- *
- * - *

If Foo’s implementation of {@link - * StateEditable} considers the name as part of the editable state, - * the user can now choose “Undo Name Change” or - * “Redo Name Change” from the respective menu. No - * further undo support is needed from the application.

- * - *

The following explains what happens in the example.

- * - *
    - *
  1. When a StateEdit is created, the associated - * {@link StateEditable} gets asked to store its state into a hash - * table, {@link #preState}.
    2. - *
  2. The application will now perform some changes to the edited - * object. This typically happens by invoking methods on the edited - * object.
    3. - *
  3. The editing phase is terminated by invoking the {@link #end()} - * method of the StateEdit. The end() method - * does two things. - * - *
      - *
    • The edited object receives a second request for storing - * its state. This time, it will use a different hash table, {@link - * #postState}.
      • - *
    • To increase efficiency, the StateEdit now removes - * any entries from {@link #preState} and {@link #postState} that have - * the same key, and whose values are equal. Equality is determined - * by invoking the equals method inherited from - * {@link java.lang.Object}.
      • - *
    4. - *
  4. When the user later chooses to undo the StateEdit, - * the edited object is asked to {@linkplain StateEditable#restoreState - * restore its state} from the {@link #preState} table. Similarly, - * when the user chooses to redo the StateEdit, - * the edited object gets asked to restore its state from the {@link - * #postState}.
    5. - *
- * - * @author Andrew Selkirk (aselkirk@sympatico.ca) - * @author Sascha Brawer (brawer@dandelis.ch) - */ -public class StateEdit - extends AbstractUndoableEdit -{ - /** - * The ID of the Java source file in Sun’s Revision Control - * System (RCS). This certainly should not be part of the API - * specification. But in order to be API-compatible with - * Sun’s reference implementation, GNU Classpath also has to - * provide this field. However, we do not try to match its value. - */ - protected static final String RCSID = ""; - - - /** - * The object which is being edited by this StateEdit. - */ - protected StateEditable object; - - - /** - * The state of object at the time of constructing - * this StateEdit. - */ - protected Hashtable preState; - - - /** - * The state of object at the time when {@link #end()} - * was called. - */ - protected Hashtable postState; - - - /** - * A human-readable name for this edit action. - */ - protected String undoRedoName; - - - /** - * Constructs a StateEdit, specifying the object whose - * state is being edited. - * - * @param obj the object whose state is being edited by this - * StateEdit. - */ - public StateEdit(StateEditable obj) - { - init(obj, null); - } - - - /** - * Constructs a StateEdit, specifying the object whose - * state is being edited. - * - * @param obj the object whose state is being edited by this - * StateEdit. - * - * @param name the human-readable name of the editing action. - */ - public StateEdit(StateEditable obj, String name) - { - init(obj, name); - } - - - /** - * Initializes this StateEdit. The edited object will - * be asked to store its current state into {@link #preState}. - * - * @param obj the object being edited. - * - * @param name the human-readable name of the editing action. - */ - protected void init(StateEditable obj, String name) - { - object = obj; - undoRedoName = name; - preState = new Hashtable(); - postState = new Hashtable(); - obj.storeState(preState); - } - - - /** - * Informs this StateEdit that all edits are finished. - * The edited object will be asked to store its state into {@link - * #postState}, and any redundant entries will get removed from - * {@link #preState} and {@link #postState}. - */ - public void end() - { - object.storeState(postState); - removeRedundantState(); - } - - - /** - * Undoes this edit operation. The edited object will be asked to - * {@linkplain StateEditable#restoreState restore its state} from - * {@link #preState}. - * - * @throws CannotUndoException if {@link #canUndo()} returns - * false, for example because this action has already - * been undone. - */ - public void undo() - { - super.undo(); - object.restoreState(preState); - } - - - /** - * Redoes this edit operation. The edited object will be asked to - * {@linkplain StateEditable#restoreState restore its state} from - * {@link #postState}. - * - * @throws CannotRedoException if {@link #canRedo()} returns - * false, for example because this action has not yet - * been undone. - */ - public void redo() - { - super.redo(); - object.restoreState(postState); - } - - - /** - * Returns a human-readable, localized name that describes this - * editing action and can be displayed to the user. - * - * @return the name, or null if no presentation - * name is available. - */ - public String getPresentationName() - { - return undoRedoName; - } - - - /** - * Removes all redundant entries from the pre- and post-edit state - * hash tables. An entry is considered redundant if it is present - * both before and after the edit, and if the two values are equal. - */ - protected void removeRedundantState() - { - Iterator i = preState.keySet().iterator(); - while (i.hasNext()) - { - Object key = i.next(); - if (postState.containsKey(key)) - { - if (preState.get(key).equals(postState.get(key))) - { - i.remove(); - postState.remove(key); - } - } - } - } -} -- cgit v1.1