Mercurial > projects > dwt-addons
view dwtx/text/edits/CopyTargetEdit.d @ 159:7926b636c282
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author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 27 Aug 2008 01:57:58 +0200 |
parents | f70d9508c95c |
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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.CopyTargetEdit; import dwtx.text.edits.MultiTextEdit; // packageimport import dwtx.text.edits.CopySourceEdit; // packageimport import dwtx.text.edits.MoveSourceEdit; // packageimport import dwtx.text.edits.CopyingRangeMarker; // packageimport import dwtx.text.edits.ReplaceEdit; // packageimport import dwtx.text.edits.EditDocument; // packageimport import dwtx.text.edits.UndoCollector; // packageimport import dwtx.text.edits.DeleteEdit; // packageimport import dwtx.text.edits.MoveTargetEdit; // packageimport import dwtx.text.edits.TextEditCopier; // packageimport import dwtx.text.edits.ISourceModifier; // packageimport import dwtx.text.edits.TextEditMessages; // packageimport import dwtx.text.edits.TextEditProcessor; // packageimport import dwtx.text.edits.MalformedTreeException; // packageimport import dwtx.text.edits.TreeIterationInfo; // packageimport import dwtx.text.edits.TextEditVisitor; // packageimport import dwtx.text.edits.TextEditGroup; // packageimport import dwtx.text.edits.TextEdit; // packageimport import dwtx.text.edits.RangeMarker; // packageimport import dwtx.text.edits.UndoEdit; // packageimport import dwtx.text.edits.InsertEdit; // packageimport import dwt.dwthelper.utils; import dwtx.dwtxhelper.Collection; import dwtx.core.runtime.Assert; import dwtx.jface.text.BadLocationException; import dwtx.jface.text.IDocument; /** * A copy target edit denotes the target of a copy operation. Copy * 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 the associated source edit. * Violating one of two requirements will result in a <code> * MalformedTreeException</code> when executing the edit tree. * <p> * Copy target edits can't be used as a parent for other edits. * Trying to add an edit to a copy target edit results in a <code> * MalformedTreeException</code> as well. * * @see dwtx.text.edits.CopySourceEdit * * @since 3.0 */ public final class CopyTargetEdit : TextEdit { private CopySourceEdit fSource; /** * Constructs a new copy target edit * * @param offset the edit's offset */ public this(int offset) { super(offset, 0); } /** * Constructs an new copy target edit * * @param offset the edit's offset * @param source the corresponding source edit */ public this(int offset, CopySourceEdit source) { this(offset); setSourceEdit(source); } /* * Copy constructor */ private this(CopyTargetEdit 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 CopySourceEdit 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(CopySourceEdit edit) { Assert.isNotNull(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("CopyTargetEdit.wrong_parent")); //$NON-NLS-1$ parent= parent.getParent(); } } } /* * @see TextEdit#doCopy */ protected TextEdit doCopy() { return new CopyTargetEdit(this); } /* * @see TextEdit#postProcessCopy */ protected void postProcessCopy(TextEditCopier copier) { if (fSource !is null) { CopyTargetEdit target= cast(CopyTargetEdit)copier.getCopy(this); CopySourceEdit source= cast(CopySourceEdit)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); } } /* * @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) { if (fSource is null) throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("CopyTargetEdit.no_source")); //$NON-NLS-1$ if (fSource.getTargetEdit() !is this) throw new MalformedTreeException(getParent(), this, TextEditMessages.getString("CopyTargetEdit.different_target")); //$NON-NLS-1$ } /* * @see TextEdit#performDocumentUpdating */ int performDocumentUpdating(IDocument document) { String source= fSource.getContent(); document.replace(getOffset(), getLength(), source); fDelta= source.length() - getLength(); fSource.clearContent(); return fDelta; } /* * @see TextEdit#deleteChildren */ bool deleteChildren() { return false; } }