author | darcy |
Sun, 23 Mar 2014 13:49:48 -0700 | |
changeset 23697 | e556a715949f |
parent 5506 | 202f599c92aa |
child 24495 | a5c854a00679 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.undo; |
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import java.util.*; |
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/** |
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* A concrete subclass of AbstractUndoableEdit, used to assemble little |
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* UndoableEdits into great big ones. |
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* |
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* @author Ray Ryan |
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*/ |
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@SuppressWarnings("serial") // Same-version serialization only |
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public class CompoundEdit extends AbstractUndoableEdit { |
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/** |
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* True if this edit has never received <code>end</code>. |
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*/ |
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boolean inProgress; |
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/** |
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* The collection of <code>UndoableEdit</code>s |
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* undone/redone en masse by this <code>CompoundEdit</code>. |
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*/ |
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protected Vector<UndoableEdit> edits; |
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public CompoundEdit() { |
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super(); |
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inProgress = true; |
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edits = new Vector<UndoableEdit>(); |
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} |
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/** |
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* Sends <code>undo</code> to all contained |
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* <code>UndoableEdits</code> in the reverse of |
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* the order in which they were added. |
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*/ |
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public void undo() throws CannotUndoException { |
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super.undo(); |
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int i = edits.size(); |
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while (i-- > 0) { |
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267cc4de4221
6776095: Code improvement and warnings removing from swing packages
rupashka
parents:
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changeset
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UndoableEdit e = edits.elementAt(i); |
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e.undo(); |
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} |
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} |
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/** |
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* Sends <code>redo</code> to all contained |
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* <code>UndoableEdit</code>s in the order in |
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* which they were added. |
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*/ |
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public void redo() throws CannotRedoException { |
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super.redo(); |
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Enumeration cursor = edits.elements(); |
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while (cursor.hasMoreElements()) { |
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((UndoableEdit)cursor.nextElement()).redo(); |
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} |
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} |
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/** |
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* Returns the last <code>UndoableEdit</code> in |
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* <code>edits</code>, or <code>null</code> |
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* if <code>edits</code> is empty. |
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*/ |
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protected UndoableEdit lastEdit() { |
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int count = edits.size(); |
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if (count > 0) |
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267cc4de4221
6776095: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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return edits.elementAt(count-1); |
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else |
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return null; |
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} |
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/** |
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* Sends <code>die</code> to each subedit, |
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* in the reverse of the order that they were added. |
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*/ |
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public void die() { |
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int size = edits.size(); |
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for (int i = size-1; i >= 0; i--) |
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{ |
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1843
267cc4de4221
6776095: Code improvement and warnings removing from swing packages
rupashka
parents:
2
diff
changeset
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UndoableEdit e = edits.elementAt(i); |
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// System.out.println("CompoundEdit(" + i + "): Discarding " + |
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// e.getUndoPresentationName()); |
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e.die(); |
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} |
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super.die(); |
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} |
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/** |
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* If this edit is <code>inProgress</code>, |
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* accepts <code>anEdit</code> and returns true. |
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* |
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* <p>The last edit added to this <code>CompoundEdit</code> |
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* is given a chance to <code>addEdit(anEdit)</code>. |
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* If it refuses (returns false), <code>anEdit</code> is |
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* given a chance to <code>replaceEdit</code> the last edit. |
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* If <code>anEdit</code> returns false here, |
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* it is added to <code>edits</code>. |
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* |
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* @param anEdit the edit to be added |
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* @return true if the edit is <code>inProgress</code>; |
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* otherwise returns false |
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*/ |
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public boolean addEdit(UndoableEdit anEdit) { |
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if (!inProgress) { |
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return false; |
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} else { |
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UndoableEdit last = lastEdit(); |
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// If this is the first subedit received, just add it. |
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// Otherwise, give the last one a chance to absorb the new |
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// one. If it won't, give the new one a chance to absorb |
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// the last one. |
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if (last == null) { |
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edits.addElement(anEdit); |
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} |
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else if (!last.addEdit(anEdit)) { |
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if (anEdit.replaceEdit(last)) { |
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edits.removeElementAt(edits.size()-1); |
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} |
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edits.addElement(anEdit); |
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} |
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return true; |
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} |
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} |
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/** |
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* Sets <code>inProgress</code> to false. |
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* |
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* @see #canUndo |
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* @see #canRedo |
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*/ |
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public void end() { |
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inProgress = false; |
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} |
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/** |
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* Returns false if <code>isInProgress</code> or if super |
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* returns false. |
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* |
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* @see #isInProgress |
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*/ |
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public boolean canUndo() { |
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return !isInProgress() && super.canUndo(); |
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} |
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/** |
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* Returns false if <code>isInProgress</code> or if super |
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* returns false. |
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* |
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* @see #isInProgress |
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*/ |
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public boolean canRedo() { |
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return !isInProgress() && super.canRedo(); |
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} |
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/** |
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* Returns true if this edit is in progress--that is, it has not |
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* received end. This generally means that edits are still being |
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* added to it. |
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* |
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* @see #end |
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*/ |
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public boolean isInProgress() { |
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return inProgress; |
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} |
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/** |
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* Returns true if any of the <code>UndoableEdit</code>s |
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* in <code>edits</code> do. |
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* Returns false if they all return false. |
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*/ |
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public boolean isSignificant() { |
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Enumeration cursor = edits.elements(); |
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while (cursor.hasMoreElements()) { |
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if (((UndoableEdit)cursor.nextElement()).isSignificant()) { |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Returns <code>getPresentationName</code> from the |
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* last <code>UndoableEdit</code> added to |
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* <code>edits</code>. If <code>edits</code> is empty, |
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* calls super. |
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*/ |
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public String getPresentationName() { |
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UndoableEdit last = lastEdit(); |
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if (last != null) { |
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return last.getPresentationName(); |
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} else { |
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return super.getPresentationName(); |
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} |
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} |
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/** |
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* Returns <code>getUndoPresentationName</code> |
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* from the last <code>UndoableEdit</code> |
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* added to <code>edits</code>. |
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* If <code>edits</code> is empty, calls super. |
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*/ |
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public String getUndoPresentationName() { |
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UndoableEdit last = lastEdit(); |
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if (last != null) { |
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return last.getUndoPresentationName(); |
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} else { |
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return super.getUndoPresentationName(); |
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} |
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} |
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/** |
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* Returns <code>getRedoPresentationName</code> |
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* from the last <code>UndoableEdit</code> |
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* added to <code>edits</code>. |
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* If <code>edits</code> is empty, calls super. |
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*/ |
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public String getRedoPresentationName() { |
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UndoableEdit last = lastEdit(); |
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if (last != null) { |
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return last.getRedoPresentationName(); |
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} else { |
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return super.getRedoPresentationName(); |
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} |
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} |
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/** |
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* Returns a string that displays and identifies this |
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* object's properties. |
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* |
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* @return a String representation of this object |
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*/ |
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public String toString() |
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{ |
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return super.toString() |
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+ " inProgress: " + inProgress |
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+ " edits: " + edits; |
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} |
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} |