| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.text.java; |
| |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.jface.dialogs.MessageDialog; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.text.link.LinkedModeModel; |
| import org.eclipse.jface.text.link.LinkedModeUI; |
| import org.eclipse.jface.text.link.LinkedPosition; |
| import org.eclipse.jface.text.link.LinkedPositionGroup; |
| |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.texteditor.link.EditorLinkedModeUI; |
| |
| import org.eclipse.jdt.core.CompletionProposal; |
| |
| import org.eclipse.jdt.ui.text.java.JavaContentAssistInvocationContext; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.javaeditor.EditorHighlightingSynchronizer; |
| import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor; |
| |
| /** |
| * An experimental proposal. |
| */ |
| public final class ExperimentalProposal extends JavaMethodCompletionProposal { |
| |
| private IRegion fSelectedRegion; // initialized by apply() |
| private int[] fArgumentOffsets; |
| private int[] fArgumentLengths; |
| |
| public ExperimentalProposal(CompletionProposal proposal, JavaContentAssistInvocationContext context) { |
| super(proposal, context); |
| } |
| |
| /* |
| * @see ICompletionProposalExtension#apply(IDocument, char) |
| */ |
| public void apply(IDocument document, char trigger, int offset) { |
| super.apply(document, trigger, offset); |
| int baseOffset= getReplacementOffset(); |
| String replacement= getReplacementString(); |
| |
| if (fArgumentOffsets != null && getTextViewer() != null) { |
| try { |
| LinkedModeModel model= new LinkedModeModel(); |
| for (int i= 0; i != fArgumentOffsets.length; i++) { |
| LinkedPositionGroup group= new LinkedPositionGroup(); |
| group.addPosition(new LinkedPosition(document, baseOffset + fArgumentOffsets[i], fArgumentLengths[i], LinkedPositionGroup.NO_STOP)); |
| model.addGroup(group); |
| } |
| |
| model.forceInstall(); |
| JavaEditor editor= getJavaEditor(); |
| if (editor != null) { |
| model.addLinkingListener(new EditorHighlightingSynchronizer(editor)); |
| } |
| |
| LinkedModeUI ui= new EditorLinkedModeUI(model, getTextViewer()); |
| ui.setExitPosition(getTextViewer(), baseOffset + replacement.length(), 0, Integer.MAX_VALUE); |
| ui.setExitPolicy(new ExitPolicy(')', document)); |
| ui.setDoContextInfo(true); |
| ui.setCyclingMode(LinkedModeUI.CYCLE_WHEN_NO_PARENT); |
| ui.enter(); |
| |
| fSelectedRegion= ui.getSelectedRegion(); |
| |
| } catch (BadLocationException e) { |
| JavaPlugin.log(e); |
| openErrorDialog(e); |
| } |
| } else { |
| fSelectedRegion= new Region(baseOffset + replacement.length(), 0); |
| } |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.JavaMethodCompletionProposal#needsLinkedMode() |
| */ |
| protected boolean needsLinkedMode() { |
| return false; // we handle it ourselves |
| } |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.LazyJavaCompletionProposal#computeReplacementString() |
| */ |
| protected String computeReplacementString() { |
| |
| if (!hasParameters() || !hasArgumentList()) |
| return super.computeReplacementString(); |
| |
| char[][] parameterNames= fProposal.findParameterNames(null); |
| int count= parameterNames.length; |
| fArgumentOffsets= new int[count]; |
| fArgumentLengths= new int[count]; |
| StringBuffer buffer= new StringBuffer(String.valueOf(fProposal.getName())); |
| |
| FormatterPrefs prefs= getFormatterPrefs(); |
| if (prefs.beforeOpeningParen) |
| buffer.append(SPACE); |
| buffer.append(LPAREN); |
| |
| setCursorPosition(buffer.length()); |
| |
| if (prefs.afterOpeningParen) |
| buffer.append(SPACE); |
| |
| for (int i= 0; i != count; i++) { |
| if (i != 0) { |
| if (prefs.beforeComma) |
| buffer.append(SPACE); |
| buffer.append(COMMA); |
| if (prefs.afterComma) |
| buffer.append(SPACE); |
| } |
| |
| fArgumentOffsets[i]= buffer.length(); |
| buffer.append(parameterNames[i]); |
| fArgumentLengths[i]= parameterNames[i].length; |
| } |
| |
| if (prefs.beforeClosingParen) |
| buffer.append(SPACE); |
| |
| buffer.append(RPAREN); |
| |
| return buffer.toString(); |
| } |
| |
| /** |
| * Returns the currently active java editor, or <code>null</code> if it |
| * cannot be determined. |
| * |
| * @return the currently active java editor, or <code>null</code> |
| */ |
| private JavaEditor getJavaEditor() { |
| IEditorPart part= JavaPlugin.getActivePage().getActiveEditor(); |
| if (part instanceof JavaEditor) |
| return (JavaEditor) part; |
| else |
| return null; |
| } |
| |
| /* |
| * @see ICompletionProposal#getSelection(IDocument) |
| */ |
| public Point getSelection(IDocument document) { |
| if (fSelectedRegion == null) |
| return new Point(getReplacementOffset(), 0); |
| |
| return new Point(fSelectedRegion.getOffset(), fSelectedRegion.getLength()); |
| } |
| |
| private void openErrorDialog(BadLocationException e) { |
| Shell shell= getTextViewer().getTextWidget().getShell(); |
| MessageDialog.openError(shell, JavaTextMessages.ExperimentalProposal_error_msg, e.getMessage()); |
| } |
| |
| } |