zdm/undo-redo
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Fix index handling in change manager
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Kai S. K. Engelbart
2021-12-11 14:01:31 +01:00
parent 2773d360fb
commit ee6015b353
1 changed files with 4 additions and 3 deletions
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7
src/main/java/dev/kske/undoredo/ChangeManager.java
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@@ -15,8 +15,8 @@ public final class ChangeManager<C extends Change> {
private final List<C> changes = new LinkedList<>(); private final List<C> changes = new LinkedList<>();
private int index; private int index = -1;
private int markedIndex; private int markedIndex = -1;
/** /**
* Applies the given change and appends it to the change list. * Applies the given change and appends it to the change list.
@@ -27,6 +27,7 @@ public final class ChangeManager<C extends Change> {
public void addChange(C change) { public void addChange(C change) {
change.apply(); change.apply();
changes.add(change); changes.add(change);
++index;
} }
/** /**
@@ -81,7 +82,7 @@ public final class ChangeManager<C extends Change> {
* @since 0.0.1 * @since 0.0.1
*/ */
public boolean isUndoAvailable() { public boolean isUndoAvailable() {
return index > 0; return index > -1;
} }
/** /**