| /******************************************************************************* |
| * Copyright (c) 2000, 2015 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.text.edits; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| |
| /** |
| * A move target edit denotes the target of a move operation. Move |
| * target edits are only valid inside an edit tree if they have a |
| * corresponding source edit. Furthermore a target edit can't |
| * can't be a direct or indirect child of its associated source edit. |
| * Violating one of two requirements will result in a <code> |
| * MalformedTreeException</code> when executing the edit tree. |
| * <p> |
| * Move target edits can't be used as a parent for other edits. |
| * Trying to add an edit to a move target edit results in a <code> |
| * MalformedTreeException</code> as well. |
| * |
| * @see org.eclipse.text.edits.MoveSourceEdit |
| * @see org.eclipse.text.edits.CopyTargetEdit |
| * |
| * @since 3.0 |
| */ |
| public final class MoveTargetEdit extends TextEdit { |
| |
| private MoveSourceEdit fSource; |
| |
| /** |
| * Constructs a new move target edit |
| * |
| * @param offset the edit's offset |
| */ |
| public MoveTargetEdit(int offset) { |
| super(offset, 0); |
| } |
| |
| /** |
| * Constructs an new move target edit |
| * |
| * @param offset the edit's offset |
| * @param source the corresponding source edit |
| */ |
| public MoveTargetEdit(int offset, MoveSourceEdit source) { |
| this(offset); |
| setSourceEdit(source); |
| } |
| |
| /* |
| * Copy constructor |
| */ |
| private MoveTargetEdit(MoveTargetEdit other) { |
| super(other); |
| } |
| |
| /** |
| * Returns the associated source edit or <code>null</code> |
| * if no source edit is associated yet. |
| * |
| * @return the source edit or <code>null</code> |
| */ |
| public MoveSourceEdit getSourceEdit() { |
| return fSource; |
| } |
| |
| /** |
| * Sets the source edit. |
| * |
| * @param edit the source edit |
| * |
| * @exception MalformedTreeException is thrown if the target edit |
| * is a direct or indirect child of the source edit |
| */ |
| public void setSourceEdit(MoveSourceEdit edit) { |
| if (fSource != edit) { |
| fSource= edit; |
| fSource.setTargetEdit(this); |
| TextEdit parent= getParent(); |
| while (parent != null) { |
| if (parent == fSource) |
| throw new MalformedTreeException(parent, this, TextEditMessages.getString("MoveTargetEdit.wrong_parent")); //$NON-NLS-1$ |
| parent= parent.getParent(); |
| } |
| } |
| } |
| |
| /* |
| * @see TextEdit#doCopy |
| */ |
| @Override |
| protected TextEdit doCopy() { |
| return new MoveTargetEdit(this); |
| } |
| |
| /* |
| * @see TextEdit#postProcessCopy |
| */ |
| @Override |
| protected void postProcessCopy(TextEditCopier copier) { |
| if (fSource != null) { |
| MoveTargetEdit target= (MoveTargetEdit)copier.getCopy(this); |
| MoveSourceEdit source= (MoveSourceEdit)copier.getCopy(fSource); |
| if (target != null && source != null) |
| target.setSourceEdit(source); |
| } |
| } |
| |
| /* |
| * @see TextEdit#accept0 |
| */ |
| @Override |
| protected void accept0(TextEditVisitor visitor) { |
| boolean visitChildren= visitor.visit(this); |
| if (visitChildren) { |
| acceptChildren(visitor); |
| } |
| } |
| |
| //---- consistency check ---------------------------------------------------------- |
| |
| /* |
| * @see TextEdit#traverseConsistencyCheck |
| */ |
| @Override |
| int traverseConsistencyCheck(TextEditProcessor processor, IDocument document, List<List<TextEdit>> sourceEdits) { |
| return super.traverseConsistencyCheck(processor, document, sourceEdits) + 1; |
| } |
| |
| /* |
| * @see TextEdit#performConsistencyCheck |
| */ |
| @Override |
| void performConsistencyCheck(TextEditProcessor processor, IDocument document) throws MalformedTreeException { |
| if (fSource == null) |
| throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("MoveTargetEdit.no_source")); //$NON-NLS-1$ |
| if (fSource.getTargetEdit() != this) |
| throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("MoveTargetEdit.different_target")); //$NON-NLS-1$ |
| } |
| |
| //---- document updating ---------------------------------------------------------------- |
| |
| /* |
| * @see TextEdit#performDocumentUpdating |
| */ |
| @Override |
| int performDocumentUpdating(IDocument document) throws BadLocationException { |
| String source= fSource.getContent(); |
| document.replace(getOffset(), getLength(), source); |
| fDelta= source.length() - getLength(); |
| |
| MultiTextEdit sourceRoot= fSource.getSourceRoot(); |
| if (sourceRoot != null) { |
| sourceRoot.internalMoveTree(getOffset()); |
| TextEdit[] sourceChildren= sourceRoot.removeChildren(); |
| List<TextEdit> children= new ArrayList<>(sourceChildren.length); |
| for (int i= 0; i < sourceChildren.length; i++) { |
| TextEdit child= sourceChildren[i]; |
| child.internalSetParent(this); |
| children.add(child); |
| } |
| internalSetChildren(children); |
| } |
| fSource.clearContent(); |
| return fDelta; |
| } |
| |
| //---- region updating -------------------------------------------------------------- |
| |
| /* |
| * @see org.eclipse.text.edits.TextEdit#traversePassThree |
| */ |
| @Override |
| int traverseRegionUpdating(TextEditProcessor processor, IDocument document, int accumulatedDelta, boolean delete) { |
| // the children got already updated / normalized while they got removed |
| // from the source edit. So we only have to adjust the offset computed to |
| // far. |
| if (delete) { |
| deleteTree(); |
| } else { |
| internalMoveTree(accumulatedDelta); |
| } |
| return accumulatedDelta + fDelta; |
| } |
| |
| @Override |
| boolean deleteChildren() { |
| return false; |
| } |
| } |