AWT/Swing merge from GNU Classpath.

From-SVN: r56147

libjava/javax/swing/undo/CompoundEdit.java

@@ -0,0 +1,282 @@
+/* AbstractTableModel.java --
+   Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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;
+
+// Imports
+import java.util.Vector;
+
+/**
+ * CompoundEdit
+ * @author Andrew Selkirk
+ */
+public class CompoundEdit extends AbstractUndoableEdit {
+
+	//-------------------------------------------------------------
+	// Variables --------------------------------------------------
+	//-------------------------------------------------------------
+
+	/**
+	 * The collection of UndoableEdits undone/redone en
+	 * masse by this CompoundEdit
+	 */
+	protected	Vector	edits		= new Vector();
+
+	/**
+	 * TODO
+	 */
+	private		boolean	inProgress	= false;
+
+
+	//-------------------------------------------------------------
+	// Initialization ---------------------------------------------
+	//-------------------------------------------------------------
+
+	/**
+	 * Create new Compound Edit
+	 */
+	public CompoundEdit() {
+	} // CompoundEdit()
+
+
+	//-------------------------------------------------------------
+	// Interface: UndoableEdit ------------------------------------
+	//-------------------------------------------------------------
+
+	/**
+	 * addEdit
+	 * @param anEdit TODO
+	 * @returns TODO
+	 */
+	public boolean addEdit(UndoableEdit anEdit) {
+
+		// Variables
+		UndoableEdit	lastEdit;
+
+		if (inProgress == true) {
+
+			// Get Last Edit
+			lastEdit = lastEdit();
+
+			// Check for null
+			if (lastEdit != null) {
+
+				if (lastEdit.addEdit(anEdit) == false) {
+					if (lastEdit.replaceEdit(anEdit) == false) {
+						edits.add(anEdit);
+					}
+				}
+
+			} // if: lastEdit
+
+			return true;
+
+		} else {
+			return false;
+		}
+	} // addEdit()
+
+	/**
+	 * canRedo
+	 * @returns TODO
+	 */
+	public boolean canRedo() {
+		if (isInProgress() == true || super.canRedo() == false) {
+			return false;
+		}
+		return true;
+	} // canRedo()
+
+	/**
+	 * canUndo
+	 * @returns TODO
+	 */
+	public boolean canUndo() {
+		if (isInProgress() == true || super.canUndo() == false) {
+			return false;
+		}
+		return true;
+	} // canUndo()
+
+	/**
+	 * die
+	 */
+	public void die() {
+
+		// Variables
+		int				index;
+		UndoableEdit	current;
+
+		// Loop through all contained UndoableEdits
+		for (index = edits.size() - 1; index >= 0; index--) {
+			current = (UndoableEdit) edits.elementAt(index);
+			current.die();
+		} // for: index
+
+	} // die()
+
+	/**
+	 * end
+	 */
+	public void end() {
+		inProgress = false;
+	} // end()
+
+	/**
+	 * getPresentationName
+	 * @returns TODO
+	 */
+	public String getPresentationName() {
+		if (edits.size() == 0) {
+			return super.getPresentationName();
+		} else {
+			return lastEdit().getPresentationName();
+		}
+	} // getPresentationName()
+
+	/**
+	 * getRedoPresentationName
+	 * @returns TODO
+	 */
+	public String getRedoPresentationName()	{
+		if (edits.size() == 0) {
+			return super.getRedoPresentationName();
+		} else {
+			return lastEdit().getRedoPresentationName();
+		}
+	} // getRedoPresentationName()
+
+	/**
+	 * getUndoPresentationName
+	 * @returns TODO
+	 */
+	public String getUndoPresentationName()	{
+		if (edits.size() == 0) {
+			return super.getUndoPresentationName();
+		} else {
+			return lastEdit().getUndoPresentationName();
+		}
+	} // getUndoPresentationName()
+
+	/**
+	 * isInProgress
+	 * @returns TODO
+	 */
+	public boolean isInProgress() {
+		return inProgress;
+	} // isInProgress()
+
+
+	/**
+	 * isSignigicant
+	 * @returns TODO
+	 */
+	public boolean isSignificant() {
+
+		// Variables
+		int				index;
+		UndoableEdit	current;
+
+		// Check each edit
+		for (index = 0; index < edits.size(); index++) {
+			current = (UndoableEdit) edits.elementAt(index);
+			if (current.isSignificant() == true) {
+				return true;
+			}
+		} // for: index
+
+		return false;
+
+	} // isSignificant()
+
+	/**
+	 * lastEdit
+	 * @returns TODO
+	 */
+	protected UndoableEdit lastEdit() {
+		if (edits.size() == 0) {
+			return null;
+		}
+		return (UndoableEdit) edits.elementAt(edits.size() - 1);
+	} // lastEdit()
+
+	/**
+	 * redo
+	 * @throws CannotRedoException TODO
+	 */
+	public void redo() throws CannotRedoException {
+
+		// Variables
+		int				index;
+		UndoableEdit	current;
+
+		// Loop through all contained UndoableEdits
+		for (index = 0; index < edits.size(); index++) {
+			current = (UndoableEdit) edits.elementAt(index);
+			current.redo();
+		} // for: index
+
+	} // redo()
+
+	/**
+	 * String representation
+	 * @returns String representation
+	 */
+	public String toString() {
+		return null; // TODO
+	} // toString()
+
+	/**
+	 * undo
+	 * @throws CannotUndoException TODO
+	 */
+	public void undo() throws CannotUndoException {
+
+		// Variables
+		int				index;
+		UndoableEdit	current;
+
+		// Loop through all contained UndoableEdits
+		for (index = edits.size() - 1; index >= 0; index--) {
+			current = (UndoableEdit) edits.elementAt(index);
+			current.undo();
+		} // for: index
+
+	} // undo()
+
+
+} // CompoundEdit