| /******************************************************************************* |
| * Copyright (c) 2010 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.jst.jsp.ui.internal.contentassist; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.TaglibController; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.tld.CMDocumentImpl; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TLDCMDocumentManager; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.tld.TaglibTracker; |
| import org.eclipse.jst.jsp.core.internal.contentmodel.tld.provisional.TLDFunction; |
| import org.eclipse.jst.jsp.core.internal.java.JSPTranslation; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.JSPELParserConstants; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.JSPELParserTokenManager; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.SimpleCharStream; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.Token; |
| import org.eclipse.jst.jsp.core.internal.regions.DOMJSPRegionContexts; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.ITextRegionContainer; |
| import org.eclipse.wst.sse.ui.contentassist.CompletionProposalInvocationContext; |
| import org.eclipse.wst.sse.ui.internal.contentassist.ContentAssistUtils; |
| import org.eclipse.wst.sse.ui.internal.contentassist.CustomCompletionProposal; |
| |
| /** |
| * <p>Compute JSP EL completion proposals</p> |
| */ |
| public class JSPELCompletionProposalComputer extends |
| JSPJavaCompletionProposalComputer { |
| |
| /** |
| * @see org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer#computeCompletionProposals(org.eclipse.wst.sse.ui.contentassist.CompletionProposalInvocationContext, org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| public List computeCompletionProposals( |
| CompletionProposalInvocationContext context, |
| IProgressMonitor monitor) { |
| |
| ITextViewer viewer = context.getViewer(); |
| int documentPosition = context.getInvocationOffset(); |
| |
| // get results from JSP completion processor |
| //3 for the "get" at the beginning of the java proposal |
| List results = new ArrayList(computeJavaCompletionProposals(viewer, documentPosition, 3)); |
| |
| //get the function proposals for syntax like: ${ fn:| } |
| IStructuredDocumentRegion flat = ContentAssistUtils.getStructuredDocumentRegion(viewer, documentPosition); |
| if (flat != null) { |
| ITextRegion cursorRegion = flat.getRegionAtCharacterOffset(documentPosition); |
| String elText; |
| int startOffset; |
| //if container then need to get inner region |
| //else can use flat region |
| if (cursorRegion instanceof ITextRegionContainer) { |
| ITextRegionContainer container = (ITextRegionContainer) cursorRegion; |
| cursorRegion = container.getRegionAtCharacterOffset(documentPosition); |
| elText = container.getText(cursorRegion); |
| startOffset = container.getStartOffset(cursorRegion); |
| } else { |
| elText = flat.getText(cursorRegion); |
| startOffset = flat.getStartOffset(cursorRegion); |
| } |
| |
| //sanity check that we are actually in EL region |
| if (cursorRegion.getType() == DOMJSPRegionContexts.JSP_EL_CONTENT) { |
| String prefix = getPrefix(documentPosition - startOffset, elText); |
| if (null != prefix) { |
| List proposals = getFunctionProposals(prefix, viewer, documentPosition); |
| results.addAll(proposals); |
| } |
| } |
| } |
| |
| return results; |
| } |
| |
| /** |
| * @see org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer#getProposalCollector( |
| * org.eclipse.jdt.core.ICompilationUnit, org.eclipse.jst.jsp.core.internal.java.JSPTranslation) |
| */ |
| protected JSPProposalCollector getProposalCollector(ICompilationUnit cu, |
| JSPTranslation translation) { |
| |
| return new JSPELProposalCollector(cu, translation); |
| } |
| |
| /** |
| * <p>Gets the EL prefix from the relative position and the given EL text</p> |
| * |
| * @param relativePosition |
| * @param elText |
| * @return |
| */ |
| private String getPrefix(int relativePosition, String elText) { |
| java.io.StringReader reader = new java.io.StringReader(elText); |
| JSPELParserTokenManager scanner = new JSPELParserTokenManager(new SimpleCharStream(reader, 1, 1)); |
| Token curToken = null, lastIdentifier = null; |
| while (JSPELParserConstants.EOF != (curToken = scanner.getNextToken()).kind) { |
| if (JSPELParserConstants.COLON == curToken.kind && curToken.endColumn == relativePosition && null != lastIdentifier) { |
| return (lastIdentifier.image); |
| } |
| |
| if (JSPELParserConstants.IDENTIFIER == curToken.kind) { |
| lastIdentifier = curToken; |
| } |
| else { |
| lastIdentifier = null; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * <p>Get the EL function proposals, ex: ${fn:| }</p> |
| * @param prefix |
| * @param viewer |
| * @param offset |
| * @return |
| */ |
| private List getFunctionProposals(String prefix, ITextViewer viewer, int offset) { |
| TLDCMDocumentManager docMgr = TaglibController.getTLDCMDocumentManager(viewer.getDocument()); |
| ArrayList completionList = new ArrayList(); |
| if (docMgr == null) |
| return null; |
| |
| Iterator taglibs = docMgr.getCMDocumentTrackers(offset).iterator(); |
| while (taglibs.hasNext()) { |
| TaglibTracker tracker = (TaglibTracker) taglibs.next(); |
| if (tracker.getPrefix().equals(prefix)) { |
| CMDocumentImpl doc = (CMDocumentImpl) tracker.getDocument(); |
| |
| List functions = doc.getFunctions(); |
| for (Iterator it = functions.iterator(); it.hasNext();) { |
| TLDFunction function = (TLDFunction) it.next(); |
| CustomCompletionProposal proposal = new CustomCompletionProposal(function.getName() + "()", //$NON-NLS-1$ |
| offset, 0, function.getName().length() + 1, null, function.getName() + " - " + function.getSignature(), null, null, 1); //$NON-NLS-1$ |
| |
| completionList.add(proposal); |
| } |
| } |
| } |
| return completionList; |
| } |
| } |