Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv9671/src/net/sourceforge/bprocessor/model
Modified Files:
History.java
Log Message:
History class cleared
Index: History.java
===================================================================
RCS file: /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model/History.java,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** History.java 11 Jan 2006 10:19:58 -0000 1.1
--- History.java 18 Oct 2007 09:19:28 -0000 1.2
***************
*** 8,107 ****
package net.sourceforge.bprocessor.model;
- import java.util.Stack;
-
/**
! * The History for containing commands for undo and redo support
*/
public class History {
- /** The undo stack */
- private Stack undoStack;
-
- /** The redo stack */
- private Stack redoStack;
-
- /** A singular history instance */
- private static History instance = new History();
-
- /**
- * Return the singular history instance
- * @return The history
- */
- public static History getInstance() {
- return instance;
- }
-
- /**
- * Constructor for History
- */
- public History() {
- undoStack = new Stack();
- redoStack = new Stack();
- }
-
- /**
- * Apply a command, clear the redo stack and
- * push the new command on the undo stack.
- * @param command The command to apply
- */
- public void apply(Command command) {
- command.apply();
- redoStack.clear();
- undoStack.push(command);
- }
-
- /**
- * Undo the command on top of undo stack and push
- * it on the redo stack
- */
- public void undo() {
- if (!undoStack.isEmpty()) {
- Command top = (Command) undoStack.pop();
- top.undo();
- redoStack.push(top);
- }
- }
-
- /**
- * Redo the command on top of redo stack and push
- * it on the undo stack
- */
- public void redo() {
- if (!redoStack.isEmpty()) {
- Command top = (Command) redoStack.pop();
- top.redo();
- undoStack.push(top);
- }
- }
- /**
- * Return the top of the undo stack or null if empty.
- * @return The top of the undo stack
- */
- public Command undoTop() {
- if (!undoStack.isEmpty()) {
- return (Command) undoStack.peek();
- } else {
- return null;
- }
- }
-
- /**
- * Return the top of the redo stack or null if empty.
- * @return The top of the redo stack
- */
- public Command redoTop() {
- if (!redoStack.isEmpty()) {
- return (Command) redoStack.peek();
- } else {
- return null;
- }
- }
-
- /**
- * Clear this History
- */
- public void clear() {
- undoStack.clear();
- redoStack.clear();
- }
}
--- 8,15 ----
package net.sourceforge.bprocessor.model;
/**
! * History
*/
public class History {
}
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