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Remove listeners in RedoAction for memory efficiency #11839

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Remove listeners in RedoAction for memory efficiency #11839

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e0668a0
fix remove listeners in RedoAction for memory efficiency, used WeakCh…
melisolmez Sep 26, 2024
67035ee
fix checkstyle error
melisolmez Sep 26, 2024
6cfe017
fix checkstyle error
melisolmez Sep 26, 2024
955d4da
revert javadoc and fix catch indent
melisolmez Sep 27, 2024
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15 changes: 11 additions & 4 deletions src/main/java/org/jabref/gui/undo/RedoAction.java
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Original file line number Diff line number Diff line change
@@ -1,7 +1,10 @@
package org.jabref.gui.undo;

import java.util.Optional;
import java.util.function.Supplier;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.WeakChangeListener;
import javax.swing.undo.CannotRedoException;

import org.jabref.gui.DialogService;
Expand All @@ -21,11 +24,15 @@ public RedoAction(Supplier<LibraryTab> tabSupplier, DialogService dialogService,
this.tabSupplier = tabSupplier;
this.dialogService = dialogService;

// TODO: The old listener should be removed. Otherwise, memory consumption will increase.
stateManager.activeTabProperty().addListener((observable, oldValue, activeLibraryTab) -> {
ChangeListener<Optional<LibraryTab>> listener = (observable, oldValue, activeLibraryTab) -> {
activeLibraryTab.ifPresent(libraryTab ->
this.executable.bind(libraryTab.getUndoManager().getRedoableProperty()));
});
this.executable.bind(libraryTab.getUndoManager().getRedoableProperty()));

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This empty line is not necessary, is it?

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actually this empty line is for exists to separate lines 30 and 32 from each other. But I can remove.

oldValue.ifPresent(libraryTab -> this.executable.unbind());
};

WeakChangeListener<Optional<LibraryTab>> weakListener = new WeakChangeListener<>(listener);
stateManager.activeTabProperty().addListener(weakListener);
}

@Override
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