content: /**
   *  Copyright (c) 2015-2016 Angelo ZERR.
   *  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:
   *  Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
   */
  package ts.eclipse.ide.ui.hover;
  
  import java.lang.reflect.Method;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  
  import org.eclipse.core.resources.IFile;
  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.source.Annotation;
  
  import ts.client.CommandNames;
  import ts.client.codefixes.CodeAction;
  import ts.eclipse.ide.core.resources.IIDETypeScriptProject;
  import ts.eclipse.ide.core.utils.TypeScriptResourceUtil;
  import ts.eclipse.ide.ui.TypeScriptUIPlugin;
  import ts.resources.ITypeScriptFile;
  import ts.resources.ITypeScriptProject;
  
  /**
   * Problem Hover used to display errors when mouse over a JS content which have
   * a TypeScript error.
   *
   */
  public class ProblemTypeScriptHover extends AbstractAnnotationHover {
  
  	protected static class ProblemInfo extends AnnotationInfo {
  
  		private static final Class<?>[] EMPTY_CLASS = new Class[0];
  		private static final Object[] EMPTY_OBJECT = new Object[0];
  		private static final String GET_ATTRIBUTES_METHOD_NAME = "getAttributes";
  		
  		private static final ICompletionProposal[] NO_PROPOSALS = new ICompletionProposal[0];
  
  		public ProblemInfo(Annotation annotation, Position position, ITextViewer textViewer) {
  			super(annotation, position, textViewer);
  		}
  
  		@Override
  		public ICompletionProposal[] getCompletionProposals() {
  			IDocument document = viewer.getDocument();
  			IFile file = TypeScriptResourceUtil.getFile(document);
  			try {
  				IIDETypeScriptProject tsProject = TypeScriptResourceUtil.getTypeScriptProject(file.getProject());
  				if (tsProject.canSupport(CommandNames.GetCodeFixes)) {
  					// Get code fixes with TypeScript 2.1.1
  					ITypeScriptFile tsFile = tsProject.openFile(file, document);
  					List<Integer> errorCodes = createErrorCodes(tsProject);
  					if (errorCodes != null) {
  						final List<ICompletionProposal> proposals = new ArrayList<ICompletionProposal>();
  						List<CodeAction> codeActions = tsFile.getCodeFixes(position.getOffset(),
  								position.getOffset() + position.getLength(), errorCodes)
  								.get(5000, TimeUnit.MILLISECONDS);
  						for (CodeAction codeAction : codeActions) {
  							proposals.add(new CodeActionCompletionProposal(codeAction, tsFile.getName()));
  						}
  						return proposals.toArray(new ICompletionProposal[proposals.size()]);
  					}
  					return NO_PROPOSALS;
  				}
  			} catch (Exception e) {
  				e.printStackTrace();
  			}
  			return NO_PROPOSALS;
  		}
  
  		private List<Integer> createErrorCodes(ITypeScriptProject tsProject) {
  			List<Integer> errorCodes = null;
  			try {
  				// Try to retrieve the TypeScript error code from the SSE
  				// TemporaryAnnotation.
  				Method getAttributesMethod = annotation.getClass().getMethod(GET_ATTRIBUTES_METHOD_NAME, EMPTY_CLASS);
  				Map getAttributes = (Map) getAttributesMethod.invoke(annotation, EMPTY_OBJECT);
  				Integer tsCode = (Integer) getAttributes.get("tsCode");
  				if (tsCode != null) {
  					Integer errorCode = tsCode;
  					if (tsProject.canFix(errorCode)) {
  						if (errorCodes == null) {
  							errorCodes = new ArrayList<Integer>();
  						}
  						errorCodes.add(errorCode);
  					}
  				}
  			} catch (NoSuchMethodException e) {
  				// The annotation is not a
  				// org.eclipse.wst.sse.ui.internal.reconcile.TemporaryAnnotation
  				// ignore the error.
  			} catch (Throwable e) {
  				TypeScriptUIPlugin.log("Error while getting TypeScript error code", e);
  			}
  			return errorCodes;
  		}
  	}
  
  	public ProblemTypeScriptHover() {
  		super(false);
  	}
  
  	@Override
  	protected AnnotationInfo createAnnotationInfo(Annotation annotation, Position position, ITextViewer textViewer) {
  		return new ProblemInfo(annotation, position, textViewer);
  	}
  
  }
  