Mercurial > projects > dwt-addons
view dwtx/text/edits/MoveTargetEdit.d @ 130:b56e9be9fe88
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 24 Aug 2008 00:30:47 +0200 |
parents | eb30df5ca28b |
children | c4fb132a086c |
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/******************************************************************************* * Copyright (c) 2000, 2006 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.text.edits.MoveTargetEdit; import dwt.dwthelper.utils; import java.util.ArrayList; import java.util.List; import dwtx.jface.text.BadLocationException; import dwtx.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 dwtx.text.edits.MoveSourceEdit * @see dwtx.text.edits.CopyTargetEdit * * @since 3.0 */ public final class MoveTargetEdit : TextEdit { private MoveSourceEdit fSource; /** * Constructs a new move target edit * * @param offset the edit's offset */ public this(int offset) { super(offset, 0); } /** * Constructs an new move target edit * * @param offset the edit's offset * @param source the corresponding source edit */ public this(int offset, MoveSourceEdit source) { this(offset); setSourceEdit(source); } /* * Copy constructor */ private this(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 this 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 !is edit) { fSource= edit; fSource.setTargetEdit(this); TextEdit parent= getParent(); while (parent !is null) { if (parent is fSource) throw new MalformedTreeException(parent, this, TextEditMessages.getString("MoveTargetEdit.wrong_parent")); //$NON-NLS-1$ parent= parent.getParent(); } } } /* * @see TextEdit#doCopy */ protected TextEdit doCopy() { return new MoveTargetEdit(this); } /* * @see TextEdit#postProcessCopy */ protected void postProcessCopy(TextEditCopier copier) { if (fSource !is null) { MoveTargetEdit target= (MoveTargetEdit)copier.getCopy(this); MoveSourceEdit source= (MoveSourceEdit)copier.getCopy(fSource); if (target !is null && source !is null) target.setSourceEdit(source); } } /* * @see TextEdit#accept0 */ protected void accept0(TextEditVisitor visitor) { bool visitChildren= visitor.visit(this); if (visitChildren) { acceptChildren(visitor); } } //---- consistency check ---------------------------------------------------------- /* * @see TextEdit#traverseConsistencyCheck */ int traverseConsistencyCheck(TextEditProcessor processor, IDocument document, List sourceEdits) { return super.traverseConsistencyCheck(processor, document, sourceEdits) + 1; } /* * @see TextEdit#performConsistencyCheck */ void performConsistencyCheck(TextEditProcessor processor, IDocument document) throws MalformedTreeException { if (fSource is null) throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("MoveTargetEdit.no_source")); //$NON-NLS-1$ if (fSource.getTargetEdit() !is this) throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("MoveTargetEdit.different_target")); //$NON-NLS-1$ } //---- document updating ---------------------------------------------------------------- /* * @see TextEdit#performDocumentUpdating */ 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 !is null) { sourceRoot.internalMoveTree(getOffset()); TextEdit[] sourceChildren= sourceRoot.removeChildren(); List 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 dwtx.text.edits.TextEdit#traversePassThree */ int traverseRegionUpdating(TextEditProcessor processor, IDocument document, int accumulatedDelta, bool 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; } bool deleteChildren() { return false; } }