| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jface.text.templates; |
| |
| |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.Point; |
| |
| import org.eclipse.jface.text.Assert; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DocumentEvent; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| import org.eclipse.jface.text.contentassist.ICompletionProposalExtension2; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| |
| |
| /** |
| * An enhanced implementation of the <code>ICompletionProposal</code> interface implementing all the extension interfaces. |
| */ |
| final class PositionBasedCompletionProposal implements ICompletionProposal, ICompletionProposalExtension2 { |
| |
| /** The string to be displayed in the completion proposal popup */ |
| private String fDisplayString; |
| /** The replacement string */ |
| private String fReplacementString; |
| /** The replacement position. */ |
| private Position fReplacementPosition; |
| /** The cursor position after this proposal has been applied */ |
| private int fCursorPosition; |
| /** The image to be displayed in the completion proposal popup */ |
| private Image fImage; |
| /** The context information of this proposal */ |
| private IContextInformation fContextInformation; |
| /** The additional info of this proposal */ |
| private String fAdditionalProposalInfo; |
| |
| /** |
| * Creates a new completion proposal based on the provided information. The replacement string is |
| * considered being the display string too. All remaining fields are set to <code>null</code>. |
| * |
| * @param replacementString the actual string to be inserted into the document |
| * @param replacementPosition the position of the text to be replaced |
| * @param cursorPosition the position of the cursor following the insert relative to replacementOffset |
| */ |
| public PositionBasedCompletionProposal(String replacementString, Position replacementPosition, int cursorPosition) { |
| this(replacementString, replacementPosition, cursorPosition, null, null, null, null); |
| } |
| |
| /** |
| * Creates a new completion proposal. All fields are initialized based on the provided information. |
| * |
| * @param replacementString the actual string to be inserted into the document |
| * @param replacementPosition the position of the text to be replaced |
| * @param cursorPosition the position of the cursor following the insert relative to replacementOffset |
| * @param image the image to display for this proposal |
| * @param displayString the string to be displayed for the proposal |
| * @param contextInformation the context information associated with this proposal |
| * @param additionalProposalInfo the additional information associated with this proposal |
| */ |
| public PositionBasedCompletionProposal(String replacementString, Position replacementPosition, int cursorPosition, Image image, String displayString, IContextInformation contextInformation, String additionalProposalInfo) { |
| Assert.isNotNull(replacementString); |
| Assert.isTrue(replacementPosition != null); |
| |
| fReplacementString= replacementString; |
| fReplacementPosition= replacementPosition; |
| fCursorPosition= cursorPosition; |
| fImage= image; |
| fDisplayString= displayString; |
| fContextInformation= contextInformation; |
| fAdditionalProposalInfo= additionalProposalInfo; |
| } |
| |
| /* |
| * @see ICompletionProposal#apply(IDocument) |
| */ |
| public void apply(IDocument document) { |
| try { |
| document.replace(fReplacementPosition.getOffset(), fReplacementPosition.getLength(), fReplacementString); |
| } catch (BadLocationException x) { |
| // ignore |
| } |
| } |
| |
| /* |
| * @see ICompletionProposal#getSelection(IDocument) |
| */ |
| public Point getSelection(IDocument document) { |
| return new Point(fReplacementPosition.getOffset() + fCursorPosition, 0); |
| } |
| |
| /* |
| * @see ICompletionProposal#getContextInformation() |
| */ |
| public IContextInformation getContextInformation() { |
| return fContextInformation; |
| } |
| |
| /* |
| * @see ICompletionProposal#getImage() |
| */ |
| public Image getImage() { |
| return fImage; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.ICompletionProposal#getDisplayString() |
| */ |
| public String getDisplayString() { |
| if (fDisplayString != null) |
| return fDisplayString; |
| return fReplacementString; |
| } |
| |
| /* |
| * @see ICompletionProposal#getAdditionalProposalInfo() |
| */ |
| public String getAdditionalProposalInfo() { |
| return fAdditionalProposalInfo; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#apply(org.eclipse.jface.text.ITextViewer, char, int, int) |
| */ |
| public void apply(ITextViewer viewer, char trigger, int stateMask, int offset) { |
| apply(viewer.getDocument()); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#selected(org.eclipse.jface.text.ITextViewer, boolean) |
| */ |
| public void selected(ITextViewer viewer, boolean smartToggle) { |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#unselected(org.eclipse.jface.text.ITextViewer) |
| */ |
| public void unselected(ITextViewer viewer) { |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension2#validate(org.eclipse.jface.text.IDocument, int, org.eclipse.jface.text.DocumentEvent) |
| */ |
| public boolean validate(IDocument document, int offset, DocumentEvent event) { |
| try { |
| String content= document.get(fReplacementPosition.getOffset(), fReplacementPosition.getLength()); |
| if (content.startsWith(fReplacementString)) |
| return true; |
| } catch (BadLocationException e) { |
| // ignore concurrently modified document |
| } |
| return false; |
| } |
| |
| } |