| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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 |
| *******************************************************************************/ |
| package org.eclipse.ltk.internal.ui.refactoring; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.CoreException; |
| |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.GroupCategorySet; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChange; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChangeGroup; |
| |
| import org.eclipse.jface.text.IRegion; |
| |
| import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer; |
| import org.eclipse.ltk.ui.refactoring.TextEditChangeNode; |
| import org.eclipse.ltk.ui.refactoring.TextEditChangeNode.ChildNode; |
| |
| public abstract class InternalLanguageElementNode extends TextEditChangeNode.ChildNode { |
| |
| private List fChildren; |
| private GroupCategorySet fGroupCategories; |
| |
| protected InternalLanguageElementNode(PreviewNode parent) { |
| super(parent); |
| } |
| |
| ChangePreviewViewerDescriptor getChangePreviewViewerDescriptor() throws CoreException { |
| InternalTextEditChangeNode element= getTextEditChangeNode(); |
| if (element == null) |
| return null; |
| return element.getChangePreviewViewerDescriptor(); |
| } |
| |
| void feedInput(IChangePreviewViewer viewer, List categories) throws CoreException { |
| InternalTextEditChangeNode element= getTextEditChangeNode(); |
| if (element != null) { |
| Change change= element.getChange(); |
| if (change instanceof TextEditBasedChange) { |
| List groups= collectTextEditBasedChangeGroups(categories); |
| viewer.setInput(TextEditChangePreviewViewer.createInput(change, |
| (TextEditBasedChangeGroup[])groups.toArray(new TextEditBasedChangeGroup[groups.size()]), |
| getTextRange())); |
| } |
| } else { |
| viewer.setInput(null); |
| } |
| } |
| |
| void setEnabled(boolean enabled) { |
| for (Iterator iter= fChildren.iterator(); iter.hasNext();) { |
| PreviewNode element= (PreviewNode)iter.next(); |
| element.setEnabled(enabled); |
| } |
| } |
| |
| void setEnabledShallow(boolean enabled) { |
| // do nothing. We don't manage an own enablement state. |
| } |
| |
| int getActive() { |
| Assert.isTrue(fChildren.size() > 0); |
| int result= ((PreviewNode)fChildren.get(0)).getActive(); |
| for (int i= 1; i < fChildren.size(); i++) { |
| PreviewNode element= (PreviewNode)fChildren.get(i); |
| result= PreviewNode.ACTIVATION_TABLE[element.getActive()][result]; |
| if (result == PreviewNode.PARTLY_ACTIVE) |
| break; |
| } |
| return result; |
| } |
| |
| PreviewNode[] getChildren() { |
| if (fChildren == null) |
| return PreviewNode.EMPTY_CHILDREN; |
| return (PreviewNode[]) fChildren.toArray(new PreviewNode[fChildren.size()]); |
| } |
| |
| boolean hasOneGroupCategory(List categories) { |
| if (fChildren == null) |
| return false; |
| return getGroupCategorySet().containsOneCategory(categories); |
| } |
| |
| private GroupCategorySet getGroupCategorySet() { |
| if (fGroupCategories == null) { |
| fGroupCategories= GroupCategorySet.NONE; |
| for (Iterator iter= fChildren.iterator(); iter.hasNext();) { |
| PreviewNode node= (PreviewNode)iter.next(); |
| GroupCategorySet other= null; |
| if (node instanceof TextEditGroupNode) { |
| other= ((TextEditGroupNode)node).getGroupCategorySet(); |
| } else if (node instanceof InternalLanguageElementNode) { |
| other= ((InternalLanguageElementNode)node).getGroupCategorySet(); |
| } else { |
| Assert.isTrue(false, "Shouldn't happen"); //$NON-NLS-1$ |
| } |
| fGroupCategories= GroupCategorySet.union(fGroupCategories, other); |
| } |
| } |
| return fGroupCategories; |
| } |
| |
| protected void internalAddChild(ChildNode child) { |
| if (fChildren == null) |
| fChildren= new ArrayList(2); |
| fChildren.add(child); |
| } |
| |
| private List collectTextEditBasedChangeGroups(List categories) { |
| List result= new ArrayList(10); |
| PreviewNode[] children= getChildren(); |
| for (int i= 0; i < children.length; i++) { |
| PreviewNode child= children[i]; |
| if (child instanceof TextEditGroupNode) { |
| TextEditBasedChangeGroup changeGroup= ((TextEditGroupNode)child).getChangeGroup(); |
| if (categories == null || changeGroup.getGroupCategorySet().containsOneCategory(categories)) |
| result.add(changeGroup); |
| } else if (child instanceof InternalLanguageElementNode) { |
| result.addAll(((InternalLanguageElementNode)child).collectTextEditBasedChangeGroups(categories)); |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the text region the of this language element node. |
| * |
| * @return the text region of this language element node |
| * @throws CoreException if the source region can't be obtained |
| */ |
| public abstract IRegion getTextRange() throws CoreException; |
| } |