Mercurial > projects > dwt-addons
view dwtx/jface/text/templates/DocumentTemplateContext.d @ 145:02cd5f1224d3
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author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 24 Aug 2008 22:31:00 +0200 |
parents | 26688fec6d23 |
children | 75302ef3f92f |
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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.jface.text.templates.DocumentTemplateContext; import dwtx.jface.text.templates.SimpleTemplateVariableResolver; // packageimport import dwtx.jface.text.templates.TemplateBuffer; // packageimport import dwtx.jface.text.templates.TemplateContext; // packageimport import dwtx.jface.text.templates.TemplateContextType; // packageimport import dwtx.jface.text.templates.Template; // packageimport import dwtx.jface.text.templates.TemplateVariable; // packageimport import dwtx.jface.text.templates.PositionBasedCompletionProposal; // packageimport import dwtx.jface.text.templates.TemplateException; // packageimport import dwtx.jface.text.templates.TemplateTranslator; // packageimport import dwtx.jface.text.templates.GlobalTemplateVariables; // packageimport import dwtx.jface.text.templates.InclusivePositionUpdater; // packageimport import dwtx.jface.text.templates.TemplateProposal; // packageimport import dwtx.jface.text.templates.ContextTypeRegistry; // packageimport import dwtx.jface.text.templates.JFaceTextTemplateMessages; // packageimport import dwtx.jface.text.templates.TemplateCompletionProcessor; // packageimport import dwtx.jface.text.templates.TextTemplateMessages; // packageimport import dwtx.jface.text.templates.TemplateVariableType; // packageimport import dwtx.jface.text.templates.TemplateVariableResolver; // packageimport import dwt.dwthelper.utils; import dwtx.core.runtime.Assert; import dwtx.jface.text.BadLocationException; import dwtx.jface.text.IDocument; import dwtx.jface.text.Position; /** * Instances of this class describe the context of a template as a region of * a document. That region may be either specified by its offset and length, or * by a <code>Position</code> which may or may not be registered with the * document. * <p> * Clients may instantiate and extend this class. * </p> * * @since 3.0 */ public class DocumentTemplateContext : TemplateContext { /** The text of the document. */ private final IDocument fDocument; /** * The region of the document described by this context. We store a * position since clients may specify the document region as (updateable) * Positions. */ private final Position fPosition; /** * The original offset of this context. Will only be updated by the setter * method. */ private int fOriginalOffset; /** * The original length of this context. Will only be updated by the setter * method. */ private int fOriginalLength; /** * Creates a document template context. * * @param type the context type * @param document the document this context applies to * @param offset the offset of the document region * @param length the length of the document region */ public this(TemplateContextType type, IDocument document, int offset, int length) { this(type, document, new Position(offset, length)); } /** * Creates a document template context. The supplied <code>Position</code> * will be queried to compute the <code>getStart</code> and * <code>getEnd</code> methods, which will therefore answer updated * position data if it is registered with the document. * * @param type the context type * @param document the document this context applies to * @param position the position describing the area of the document which * forms the template context * @since 3.1 */ public this(TemplateContextType type, IDocument document, Position position) { super(type); Assert.isNotNull(document); Assert.isNotNull(position); Assert.isTrue(position.getOffset() <= document.getLength()); fDocument= document; fPosition= position; fOriginalOffset= fPosition.getOffset(); fOriginalLength= fPosition.getLength(); } /** * Returns the document. * * @return the document */ public IDocument getDocument() { return fDocument; } /** * Returns the completion offset within the string of the context. * * @return the completion offset within the string of the context */ public int getCompletionOffset() { return fOriginalOffset; } /** * Sets the completion offset. * * @param newOffset the new completion offset */ protected void setCompletionOffset(int newOffset) { fOriginalOffset= newOffset; fPosition.setOffset(newOffset); } /** * Returns the completion length within the string of the context. * * @return the completion length within the string of the context */ public int getCompletionLength() { return fOriginalLength; } /** * Sets the completion length. * * @param newLength the new completion length */ protected void setCompletionLength(int newLength) { fOriginalLength= newLength; fPosition.setLength(newLength); } /** * Returns the keyword which triggered template insertion. * * @return the keyword which triggered template insertion */ public String getKey() { int offset= getStart(); int length= getEnd() - offset; try { return fDocument.get(offset, length); } catch (BadLocationException e) { return ""; //$NON-NLS-1$ } } /** * Returns the beginning offset of the keyword. * * @return the beginning offset of the keyword */ public int getStart() { return fPosition.getOffset(); } /** * Returns the end offset of the keyword. * * @return the end offset of the keyword */ public int getEnd() { return fPosition.getOffset() + fPosition.getLength(); } /* * @see dwtx.jface.text.templates.TemplateContext#canEvaluate(dwtx.jface.text.templates.Template) */ public bool canEvaluate(Template template_) { return true; } /* * @see dwtx.jface.text.templates.TemplateContext#evaluate(dwtx.jface.text.templates.Template) */ public TemplateBuffer evaluate(Template template_) { if (!canEvaluate(template_)) return null; TemplateTranslator translator= new TemplateTranslator(); TemplateBuffer buffer= translator.translate(template_); getContextType().resolve(buffer, this); return buffer; } }