| package org.eclipse.jst.jsp.ui.internal.contentassist; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| 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.jspel.ASTExpression; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.ASTFunctionInvocation; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.FindFunctionInvocationVisitor; |
| import org.eclipse.jst.jsp.core.internal.java.jspel.JSPELParser; |
| 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.ParseException; |
| 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.internal.StructuredTextViewer; |
| import org.eclipse.wst.sse.ui.internal.contentassist.ContentAssistUtils; |
| import org.eclipse.wst.sse.ui.internal.contentassist.CustomCompletionProposal; |
| import org.eclipse.wst.xml.core.internal.regions.DOMRegionContext; |
| |
| public class JSPELContentAssistProcessor extends JSPJavaContentAssistProcessor { |
| protected char elCompletionProposalAutoActivationCharacters[] = new char[]{'.', ':'}; |
| |
| protected JSPCompletionProcessor getJspCompletionProcessor() { |
| if (fJspCompletionProcessor == null) { |
| fJspCompletionProcessor = new JSPELCompletionProcessor(); |
| } |
| return fJspCompletionProcessor; |
| } |
| |
| public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentPosition) { |
| |
| |
| // get results from JSP completion processor |
| fJspCompletionProcessor = getJspCompletionProcessor(); |
| ICompletionProposal[] results = fJspCompletionProcessor.computeCompletionProposals(viewer, documentPosition); |
| fErrorMessage = fJspCompletionProcessor.getErrorMessage(); |
| if (results.length == 0 && (fErrorMessage == null || fErrorMessage.length() == 0)) { |
| fErrorMessage = UNKNOWN_CONTEXT; |
| } |
| |
| IStructuredDocumentRegion flat = ContentAssistUtils.getStructuredDocumentRegion((StructuredTextViewer) viewer, documentPosition); |
| |
| if (flat != null) { |
| ITextRegion cursorRegion = flat.getRegionAtCharacterOffset(documentPosition); |
| if (DOMRegionContext.XML_TAG_ATTRIBUTE_VALUE == cursorRegion.getType()) { |
| ITextRegionContainer container = (ITextRegionContainer) cursorRegion; |
| cursorRegion = container.getRegionAtCharacterOffset(documentPosition); |
| if (cursorRegion.getType() == DOMJSPRegionContexts.JSP_EL_CONTENT) { |
| String elText = container.getText(cursorRegion).trim(); |
| String prefix = getPrefix(documentPosition - container.getStartOffset(cursorRegion) - 1, elText); |
| if (null != prefix) { |
| List proposals = getFunctionProposals(prefix, (StructuredTextViewer) viewer, documentPosition); |
| results = new ICompletionProposal[proposals.size()]; |
| proposals.toArray(results); |
| } |
| } |
| } |
| } |
| |
| |
| return results; |
| } |
| |
| protected 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; |
| } |
| |
| protected ASTFunctionInvocation getInvocation(int relativePosition, String elText) { |
| FindFunctionInvocationVisitor visitor = new FindFunctionInvocationVisitor(relativePosition); |
| JSPELParser parser = JSPELParser.createParser(elText); |
| try { |
| ASTExpression expression = parser.Expression(); |
| return (ASTFunctionInvocation) expression.jjtAccept(visitor, null); |
| } |
| catch (ParseException e) { /* parse exception = no completion */ |
| } |
| return (null); |
| } |
| |
| |
| public char[] getCompletionProposalAutoActivationCharacters() { |
| return elCompletionProposalAutoActivationCharacters; |
| } |
| |
| protected List getFunctionProposals(String prefix, StructuredTextViewer 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; |
| } |
| |
| |
| |
| } |