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Reduce memory consumption by the logging panel (disable undo events f…
…or it) There are two fixes: 1) undoManager.setLimit(0) -> setLimit(1) since (0) means "unlimited undo" See bobbylight/RSyntaxTextArea#99 2) By default, JMeter adds undoManager to ALL text fields via Swing updateUI method, so we need to explicitly uninstall it for the case when undo is not needed
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47 changes: 47 additions & 0 deletions
47
...rc/main/java/org/apache/jorphan/gui/ui/AddUndoableEditListenerPropertyChangeListener.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to you under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.apache.jorphan.gui.ui; | ||
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| import java.beans.PropertyChangeEvent; | ||
| import java.beans.PropertyChangeListener; | ||
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| import javax.swing.text.Document; | ||
| import javax.swing.undo.UndoManager; | ||
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| class AddUndoableEditListenerPropertyChangeListener implements PropertyChangeListener { | ||
| private final UndoManager manager; | ||
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| public AddUndoableEditListenerPropertyChangeListener(UndoManager manager) { | ||
| this.manager = manager; | ||
| } | ||
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| public final UndoManager getUndoManager() { | ||
| return manager; | ||
| } | ||
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| @Override | ||
| public void propertyChange(PropertyChangeEvent evt) { | ||
| manager.discardAllEdits(); | ||
| if (evt.getOldValue() != null) { | ||
| ((Document) evt.getOldValue()).removeUndoableEditListener(manager); | ||
| } | ||
| if (evt.getNewValue() != null) { | ||
| ((Document) evt.getNewValue()).addUndoableEditListener(manager); | ||
| } | ||
| } | ||
| } |
58 changes: 58 additions & 0 deletions
58
src/jorphan/src/main/java/org/apache/jorphan/gui/ui/DefaultUndoManager.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to you under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.jorphan.gui.ui; | ||
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| import java.util.concurrent.atomic.AtomicInteger; | ||
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| import javax.swing.event.UndoableEditEvent; | ||
| import javax.swing.undo.UndoManager; | ||
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| class DefaultUndoManager extends UndoManager { | ||
| private final AtomicInteger undoEpoch; | ||
| private int ourUndoEpoch; | ||
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| DefaultUndoManager(AtomicInteger undoEpoch) { | ||
| this.undoEpoch = undoEpoch; | ||
| this.ourUndoEpoch = undoEpoch.get(); | ||
| } | ||
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| @Override | ||
| public synchronized void discardAllEdits() { | ||
| super.discardAllEdits(); | ||
| ourUndoEpoch = undoEpoch.get(); | ||
| } | ||
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| @Override | ||
| public void undoableEditHappened(UndoableEditEvent e) { | ||
| int epoch = undoEpoch.get(); | ||
| if (ourUndoEpoch != epoch) { | ||
| discardAllEdits(); | ||
| } | ||
| super.undoableEditHappened(e); | ||
| } | ||
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| @Override | ||
| public synchronized boolean canUndo() { | ||
| return ourUndoEpoch == undoEpoch.get() && super.canUndo(); | ||
| } | ||
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| @Override | ||
| public synchronized boolean canRedo() { | ||
| return ourUndoEpoch == undoEpoch.get() && super.canRedo(); | ||
| } | ||
| } |
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