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view org.eclipse.text/src/org/eclipse/jface/text/RewriteSessionEditProcessor.d @ 15:c4b1a29263fc
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 15 Mar 2009 19:51:07 +0100 |
parents | 5feec68b4556 |
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/******************************************************************************* * Copyright (c) 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 org.eclipse.jface.text.RewriteSessionEditProcessor; import org.eclipse.jface.text.IRepairableDocument; import org.eclipse.jface.text.AbstractDocument; import org.eclipse.jface.text.IDocumentPartitionerExtension3; import org.eclipse.jface.text.ConfigurableLineTracker; import org.eclipse.jface.text.IRegion; import org.eclipse.jface.text.TypedRegion; import org.eclipse.jface.text.IDocumentExtension2; import org.eclipse.jface.text.TypedPosition; import org.eclipse.jface.text.SlaveDocumentEvent; import org.eclipse.jface.text.IDocumentExtension3; import org.eclipse.jface.text.IDocumentListener; import org.eclipse.jface.text.ISynchronizable; import org.eclipse.jface.text.DocumentEvent; import org.eclipse.jface.text.Position; import org.eclipse.jface.text.IRepairableDocumentExtension; import org.eclipse.jface.text.DocumentRewriteSessionType; import org.eclipse.jface.text.Region; import org.eclipse.jface.text.IDocumentExtension4; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.TextMessages; import org.eclipse.jface.text.IDocumentPartitioningListenerExtension2; import org.eclipse.jface.text.IDocumentInformationMappingExtension; import org.eclipse.jface.text.IDocumentPartitioningListenerExtension; import org.eclipse.jface.text.ITextStore; import org.eclipse.jface.text.IDocumentPartitionerExtension; import org.eclipse.jface.text.DocumentRewriteSession; import org.eclipse.jface.text.IPositionUpdater; import org.eclipse.jface.text.ISlaveDocumentManagerExtension; import org.eclipse.jface.text.ILineTracker; import org.eclipse.jface.text.ListLineTracker; import org.eclipse.jface.text.IDocumentInformationMapping; import org.eclipse.jface.text.IDocumentRewriteSessionListener; import org.eclipse.jface.text.AbstractLineTracker; import org.eclipse.jface.text.DefaultLineTracker; import org.eclipse.jface.text.BadPositionCategoryException; import org.eclipse.jface.text.BadPartitioningException; import org.eclipse.jface.text.SequentialRewriteTextStore; import org.eclipse.jface.text.IDocumentInformationMappingExtension2; import org.eclipse.jface.text.DocumentPartitioningChangedEvent; import org.eclipse.jface.text.FindReplaceDocumentAdapter; import org.eclipse.jface.text.TextUtilities; import org.eclipse.jface.text.ISlaveDocumentManager; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.ILineTrackerExtension; import org.eclipse.jface.text.IDocumentPartitioner; import org.eclipse.jface.text.GapTextStore; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.IDocumentExtension; import org.eclipse.jface.text.IDocumentPartitioningListener; import org.eclipse.jface.text.CopyOnWriteTextStore; import org.eclipse.jface.text.DefaultPositionUpdater; import org.eclipse.jface.text.Line; import org.eclipse.jface.text.DocumentRewriteSessionEvent; import org.eclipse.jface.text.IDocumentPartitionerExtension2; import org.eclipse.jface.text.ITypedRegion; import org.eclipse.jface.text.TreeLineTracker; import java.lang.all; import org.eclipse.text.edits.CopyTargetEdit; import org.eclipse.text.edits.DeleteEdit; import org.eclipse.text.edits.InsertEdit; import org.eclipse.text.edits.MalformedTreeException; import org.eclipse.text.edits.MoveTargetEdit; import org.eclipse.text.edits.ReplaceEdit; import org.eclipse.text.edits.TextEdit; import org.eclipse.text.edits.TextEditProcessor; import org.eclipse.text.edits.TextEditVisitor; import org.eclipse.text.edits.UndoEdit; /** * A text edit processor that brackets the application of edits into a document rewrite session. * * @since 3.3 */ public final class RewriteSessionEditProcessor : TextEditProcessor { /** The threshold for <em>large</em> text edits. */ private static const int THRESHOLD= 1000; /** * Text edit visitor that estimates the compound size of an edit tree in characters. */ private static final class SizeVisitor : TextEditVisitor { int fSize= 0; public bool visit(CopyTargetEdit edit) { fSize += edit.getLength(); return super.visit(edit); } public bool visit(DeleteEdit edit) { fSize += edit.getLength(); return super.visit(edit); } public bool visit(InsertEdit edit) { fSize += edit.getText().length(); return super.visit(edit); } public bool visit(MoveTargetEdit edit) { fSize += edit.getLength(); return super.visit(edit); } public bool visit(ReplaceEdit edit) { fSize += Math.max(edit.getLength(), edit.getText().length()); return super.visit(edit); } } /** * Constructs a new edit processor for the given document. * * @param document the document to manipulate * @param root the root of the text edit tree describing the modifications. By passing a text * edit a a text edit processor the ownership of the edit is transfered to the text edit * processors. Clients must not modify the edit (e.g adding new children) any longer. * @param style {@link TextEdit#NONE}, {@link TextEdit#CREATE_UNDO} or * {@link TextEdit#UPDATE_REGIONS}) */ public this(IDocument document, TextEdit root, int style) { super(document, root, style); } /* * @see org.eclipse.text.edits.TextEditProcessor#performEdits() */ public UndoEdit performEdits() { IDocument document= getDocument(); if (!( cast(IDocumentExtension4)document )) return super.performEdits(); IDocumentExtension4 extension= cast(IDocumentExtension4) document; bool isLargeEdit= isLargeEdit(getRoot()); DocumentRewriteSessionType type= isLargeEdit ? DocumentRewriteSessionType.UNRESTRICTED : DocumentRewriteSessionType.UNRESTRICTED_SMALL; DocumentRewriteSession session= extension.startRewriteSession(type); try { return super.performEdits(); } finally { extension.stopRewriteSession(session); } } /** * Returns <code>true</code> if the passed edit is considered <em>large</em>, * <code>false</code> otherwise. * * @param edit the edit to check * @return <code>true</code> if <code>edit</code> is considered <em>large</em>, * <code>false</code> otherwise * @since 3.3 */ public static bool isLargeEdit(TextEdit edit) { SizeVisitor sizeVisitor= new SizeVisitor(); edit.accept(sizeVisitor); return sizeVisitor.fSize > THRESHOLD; } }