Mercurial > projects > dwt-addons
diff dwtx/text/edits/CopyTargetEdit.d @ 129:eb30df5ca28b
Added JFace Text sources
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Sat, 23 Aug 2008 19:10:48 +0200 |
parents | |
children | b56e9be9fe88 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwtx/text/edits/CopyTargetEdit.d Sat Aug 23 19:10:48 2008 +0200 @@ -0,0 +1,165 @@ +/******************************************************************************* + * 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 dwt.dwthelper.utils; + +import java.util.List; + +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 CopyTargetEdit(int offset) { + super(offset, 0); + } + + /** + * Constructs an new copy target edit + * + * @param offset the edit's offset + * @param source the corresponding source edit + */ + public CopyTargetEdit(int offset, CopySourceEdit source) { + this(offset); + setSourceEdit(source); + } + + /* + * Copy constructor + */ + private CopyTargetEdit(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) throws MalformedTreeException { + 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= (CopyTargetEdit)copier.getCopy(this); + CopySourceEdit source= (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) throws MalformedTreeException { + 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) throws BadLocationException { + String source= fSource.getContent(); + document.replace(getOffset(), getLength(), source); + fDelta= source.length() - getLength(); + fSource.clearContent(); + return fDelta; + } + + /* + * @see TextEdit#deleteChildren + */ + bool deleteChildren() { + return false; + } +}