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package org.eclipse.jface.databinding.viewers; |
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package org.eclipse.jface.databinding.viewers; |
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import java.util.Set; |
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import org.eclipse.core.databinding.observable.IObservableCollection; |
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import org.eclipse.core.databinding.observable.IObservableCollection; |
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import org.eclipse.core.databinding.observable.list.IListChangeListener; |
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import org.eclipse.core.databinding.observable.list.IListChangeListener; |
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import org.eclipse.core.databinding.observable.list.IObservableList; |
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import org.eclipse.core.databinding.observable.list.IObservableList; |
Lines 23-29
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import org.eclipse.core.databinding.observable.set.IObservableSet; |
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import org.eclipse.core.databinding.observable.set.IObservableSet; |
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import org.eclipse.core.runtime.Assert; |
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import org.eclipse.core.runtime.Assert; |
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import org.eclipse.jface.internal.databinding.viewers.ObservableCollectionContentProvider; |
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import org.eclipse.jface.internal.databinding.viewers.ObservableCollectionContentProvider; |
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import org.eclipse.jface.internal.databinding.viewers.ViewerElementSet; |
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import org.eclipse.jface.viewers.AbstractListViewer; |
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import org.eclipse.jface.viewers.AbstractListViewer; |
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import org.eclipse.jface.viewers.AbstractTableViewer; |
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import org.eclipse.jface.viewers.AbstractTableViewer; |
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import org.eclipse.jface.viewers.IStructuredContentProvider; |
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import org.eclipse.jface.viewers.IStructuredContentProvider; |
Lines 63-89
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((IObservableList) collection).removeListChangeListener(this); |
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((IObservableList) collection).removeListChangeListener(this); |
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} |
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} |
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public void handleListChange(ListChangeEvent event) { |
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public void handleListChange(final ListChangeEvent event) { |
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if (isViewerDisposed()) |
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if (isViewerDisposed()) |
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return; |
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return; |
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final Set removals = ViewerElementSet.withComparer(comparer); |
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event.diff.accept(new ListDiffVisitor() { |
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event.diff.accept(new ListDiffVisitor() { |
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public void handleAdd(int index, Object element) { |
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public void handleAdd(int index, Object element) { |
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knownElements.add(element); |
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knownElements.add(element); |
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viewerUpdater.insert(element, index); |
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viewerUpdater.insert(element, index); |
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realizedElements.add(element); |
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} |
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} |
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public void handleRemove(int index, Object element) { |
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public void handleRemove(int index, Object element) { |
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boolean removingLast = removingLast(element); |
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if (removingLast) |
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realizedElements.remove(element); |
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viewerUpdater.remove(element, index); |
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viewerUpdater.remove(element, index); |
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removals.add(element); |
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if (removingLast) |
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knownElements.remove(element); |
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} |
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private boolean removingLast(Object element) { |
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return !event.getObservableList().contains(element); |
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} |
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} |
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public void handleReplace(int index, Object oldElement, |
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public void handleReplace(int index, Object oldElement, |
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Object newElement) { |
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Object newElement) { |
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knownElements.add(newElement); |
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knownElements.add(newElement); |
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boolean removingLast = removingLast(oldElement); |
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if (removingLast) |
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realizedElements.remove(oldElement); |
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viewerUpdater.replace(oldElement, newElement, index); |
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viewerUpdater.replace(oldElement, newElement, index); |
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removals.add(oldElement); |
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if (removingLast) |
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knownElements.remove(oldElement); |
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realizedElements.add(newElement); |
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} |
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} |
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public void handleMove(int oldIndex, int newIndex, |
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public void handleMove(int oldIndex, int newIndex, |
Lines 91-101
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viewerUpdater.move(element, oldIndex, newIndex); |
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viewerUpdater.move(element, oldIndex, newIndex); |
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} |
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} |
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}); |
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}); |
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// For each removed element, do not remove from known elements if |
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// the element is still present elsewhere in the list. |
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removals.removeAll(event.getObservableList()); |
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knownElements.removeAll(removals); |
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} |
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} |
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} |
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} |
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Lines 130-133
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public IObservableSet getKnownElements() { |
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public IObservableSet getKnownElements() { |
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return impl.getKnownElements(); |
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return impl.getKnownElements(); |
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} |
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} |
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/** |
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* Returns the set of known elements which have been realized in the viewer. |
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* Clients may track this set in order to perform custom actions on elements |
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* while they are known to be present in the viewer. |
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* |
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* @return the set of known elements which have been realized in the viewer. |
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* @since 1.3 |
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*/ |
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public IObservableSet getRealizedElements() { |
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return impl.getRealizedElements(); |
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} |
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} |
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} |