| /******************************************************************************* |
| * Copyright (c) 2001, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.contentoutline; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.jface.viewers.SelectionChangedEvent; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| import org.eclipse.jface.viewers.TreeViewer; |
| import org.eclipse.swt.events.SelectionEvent; |
| import org.eclipse.swt.widgets.Composite; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Item; |
| import org.eclipse.swt.widgets.Tree; |
| import org.eclipse.swt.widgets.Widget; |
| import org.eclipse.ui.ISelectionListener; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.ui.internal.StructuredTextSelectionChangedEvent; |
| |
| |
| public class SourceEditorTreeViewer extends TreeViewer { |
| private int fCaretPosition; |
| private ISelectionListener[] fInvalidSelectionListeners = null; |
| |
| /** |
| * SourceEditorTreeViewer constructor comment. |
| * |
| * @param parent |
| * org.eclipse.swt.widgets.Composite |
| */ |
| public SourceEditorTreeViewer(Composite parent) { |
| super(parent); |
| } |
| |
| /** |
| * SourceEditorTreeViewer constructor comment. |
| * |
| * @param tree |
| * org.eclipse.swt.widgets.Tree |
| */ |
| public SourceEditorTreeViewer(Tree tree) { |
| super(tree); |
| } |
| |
| public synchronized void addInvalidSelectionListener(ISelectionListener listener) { |
| ISelectionListener[] newListeners = fInvalidSelectionListeners; |
| if (fInvalidSelectionListeners != null && fInvalidSelectionListeners.length > 0) { |
| List oldListeners = new ArrayList(Arrays.asList(fInvalidSelectionListeners)); |
| if (!oldListeners.contains(listener)) { |
| oldListeners.add(listener); |
| newListeners = (ISelectionListener[]) oldListeners.toArray(new ISelectionListener[0]); |
| } |
| } else { |
| newListeners = new ISelectionListener[]{listener}; |
| } |
| fInvalidSelectionListeners = newListeners; |
| } |
| |
| /** |
| * @param newSelection |
| */ |
| private void fireInvalidSelection(ISelection newSelection) { |
| if (fInvalidSelectionListeners != null) { |
| ISelectionListener[] listeners = fInvalidSelectionListeners; |
| for (int i = 0; i < listeners.length; i++) { |
| listeners[i].selectionChanged(null, newSelection); |
| } |
| } |
| } |
| |
| protected void handleInvalidSelection(ISelection invalidSelection, ISelection newSelection) { |
| IStructuredModel model = (IStructuredModel) getInput(); |
| Object selectedNode = model.getIndexedRegion(fCaretPosition); |
| if (selectedNode != null) |
| newSelection = new StructuredSelection(selectedNode); |
| // notify listeners that the TreeViewer has received an invalid |
| // selection |
| fireInvalidSelection(newSelection); |
| setSelectionToWidget(newSelection, true); |
| super.handleInvalidSelection(invalidSelection, newSelection); |
| } |
| |
| protected void handleSelect(SelectionEvent event) { |
| // handle case where an earlier selection listener disposed the |
| // control. |
| Control control = getControl(); |
| if (control != null && !control.isDisposed()) { |
| updateStructuredTextSelection(getSelection()); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) Method declared on StructuredViewer. |
| */ |
| public void internalRefresh(Object element) { |
| // If the input object is null just return. |
| if (element == null) |
| return; |
| |
| // The following skip refresh logic tries to optimize performance of |
| // the content outliner. |
| // However, when there is a structure change to the model, even if the |
| // selection is the same |
| // we should refresh the tree in case the structure change is in the |
| // children of the current selection. |
| // The following logic commented out for 178731. |
| // |
| // Skip refresh if new selection equals old selection. |
| //org.eclipse.jface.viewers.ISelection selection = getSelection(); |
| //if (selection instanceof |
| // org.eclipse.jface.viewers.IStructuredSelection) |
| // if (((org.eclipse.jface.viewers.IStructuredSelection) |
| // selection).size() == 1) |
| // if (((org.eclipse.jface.viewers.IStructuredSelection) |
| // selection).getFirstElement().equals(element)) |
| // return; |
| |
| Widget item = findItem(element); |
| if (item != null) { |
| // pick up structure changes too |
| internalRefresh(item, element, true); |
| } |
| } |
| |
| /** |
| * Refreshes the tree starting at the given widget. |
| * |
| * @param widget |
| * the widget |
| * @param element |
| * the element |
| * @param doStruct |
| * <code>true</code> if structural changes are to be picked |
| * up, and <code>false</code> if only label provider changes |
| * are of interest |
| */ |
| private void internalRefresh(Widget widget, Object element, boolean doStruct) { |
| // To avoid flashing, set repaint off while updating the tree. |
| //getControl().setRedraw(false); |
| |
| if (widget instanceof Item) { |
| if (doStruct) { |
| updatePlus((Item) widget, element); |
| } |
| updateItem(widget, element); |
| } |
| |
| if (doStruct) { |
| Object[] children = getSortedChildren(element); |
| updateChildren(widget, element, children); |
| } |
| // recurse |
| Item[] children = getChildren(widget); |
| if (children != null) { |
| for (int i = 0; i < children.length; i++) { |
| Widget item = children[i]; |
| Object data = item.getData(); |
| if (data != null) |
| internalRefresh(item, data, doStruct); |
| } |
| } |
| |
| // The purpose of the following line of code was to minimize the |
| // number of items in the tree needed to be repainted. |
| // Expanding/collapsing the tree for the user is a little confusing. |
| // Also, with new improvements to cut down unnesessary |
| // notifications to the tree, this may not be needed. |
| //expandToLevel(element, 1); |
| |
| //getControl().setRedraw(true); |
| } |
| |
| public synchronized void removeInvalidSelectionListener(ISelectionListener listener) { |
| ISelectionListener[] newListeners = fInvalidSelectionListeners; |
| if (fInvalidSelectionListeners != null && fInvalidSelectionListeners.length > 1) { |
| List oldListeners = new ArrayList(Arrays.asList(fInvalidSelectionListeners)); |
| if (oldListeners.contains(listener)) { |
| oldListeners.remove(listener); |
| newListeners = (ISelectionListener[]) oldListeners.toArray(new ISelectionListener[0]); |
| } |
| } |
| // there was only 1, remove the entire array |
| else { |
| newListeners = null; |
| } |
| fInvalidSelectionListeners = newListeners; |
| } |
| |
| /** |
| * Runs the given updateCode while selection changed notification is |
| * turned off. This ensures that no selection changes are fired as a side |
| * effect of updating the SWT control. |
| */ |
| |
| /* |
| * protected void preservingSelection(Runnable updateCode) { // This |
| * method is overridden to get rid of the selection handling // that the |
| * super classes do after the update. We have added our own // selection |
| * handling in here. IStructuredModel model = (IStructuredModel) |
| * getInput(); IndexedRegion node = null; |
| * |
| * if (model != null) node = model.getIndexedRegion(fCaretPosition); |
| * |
| * updateCode.run(); |
| * |
| * if (model != null) if (node == null) setSelection(new |
| * StructuredSelection()); else setSelection(new |
| * StructuredSelection(node)); } |
| */ |
| public void setCaretPosition(int caretPosition) { |
| fCaretPosition = caretPosition; |
| } |
| |
| public void setSelection(ISelection selection, boolean reveal) { |
| if (reveal) |
| updateStructuredTextSelection(selection); |
| |
| super.setSelection(selection, reveal); |
| } |
| |
| protected void updateStructuredTextSelection(ISelection selection) { |
| SelectionChangedEvent event = new StructuredTextSelectionChangedEvent(this, selection); |
| fireSelectionChanged(event); |
| } |
| } |