org.eclipse.jface.text.contentassist.IContentAssistant#getContentAssistProcessor ( )源码实例Demo

public ContentAssistProcessorTestBuilder assertMatchString(String matchString)
		throws Exception {
	String currentModelToParse = getModel();
	final XtextResource xtextResource = loadHelper.getResourceFor(new StringInputStream(currentModelToParse));
	final IXtextDocument xtextDocument = getDocument(xtextResource, currentModelToParse);
	XtextSourceViewerConfiguration configuration = get(XtextSourceViewerConfiguration.class);
	Shell shell = new Shell();
	try {
		ISourceViewer sourceViewer = getSourceViewer(shell, xtextDocument, configuration);
		IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
		String contentType = xtextDocument.getContentType(currentModelToParse.length());
		if (contentAssistant.getContentAssistProcessor(contentType) != null) {
			ContentAssistContext.Factory factory = get(ContentAssistContext.Factory.class);
			ContentAssistContext[] contexts = factory.create(sourceViewer, currentModelToParse.length(), xtextResource);
			for(ContentAssistContext context: contexts) {
				Assert.assertTrue("matchString = '" + matchString + "', actual: '" + context.getPrefix() + "'",
						"".equals(context.getPrefix()) || matchString.equals(context.getPrefix()));
			}
		} else {
			Assert.fail("No content assistant for content type " + contentType);
		}
		return this;
	} finally {
		shell.dispose();
	}
}
 

public ContentAssistProcessorTestBuilder assertMatchString(String matchString)
		throws Exception {
	String currentModelToParse = getModel();
	final XtextResource xtextResource = loadHelper.getResourceFor(new StringInputStream(currentModelToParse, getEncoding()));
	final IXtextDocument xtextDocument = getDocument(xtextResource, currentModelToParse);
	XtextSourceViewerConfiguration configuration = get(XtextSourceViewerConfiguration.class);
	Shell shell = new Shell();
	try {
		ISourceViewer sourceViewer = getSourceViewer(shell, xtextDocument, configuration);
		IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
		String contentType = xtextDocument.getContentType(currentModelToParse.length());
		if (contentAssistant.getContentAssistProcessor(contentType) != null) {
			ContentAssistContext.Factory factory = get(ContentAssistContext.Factory.class);
			ContentAssistContext[] contexts = factory.create(sourceViewer, currentModelToParse.length(), xtextResource);
			for(ContentAssistContext context: contexts) {
				Assert.assertTrue("matchString = '" + matchString + "', actual: '" + context.getPrefix() + "'",
						"".equals(context.getPrefix()) || matchString.equals(context.getPrefix()));
			}
		} else {
			Assert.fail("No content assistant for content type " + contentType);
		}
		return this;
	} finally {
		shell.dispose();
	}
}
 

/**
 * Internally compute completion proposals.
 *
 * @param cursorPosition
 *          the position of the cursor in the {@link IXtextDocument}
 * @param xtextDocument
 *          the {@link IXtextDocument}
 * @return a pair of {@link ICompletionProposal}[] and {@link BadLocationException}. If the tail argument is not {@code null}, an exception occurred in the UI
 *         thread.
 */
private Pair<ICompletionProposal[], BadLocationException> internalComputeCompletionProposals(final int cursorPosition, final IXtextDocument xtextDocument) {
  XtextSourceViewerConfiguration configuration = get(XtextSourceViewerConfiguration.class);
  Shell shell = new Shell();
  try {
    ISourceViewer sourceViewer = getSourceViewer(shell, xtextDocument, configuration);
    IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
    String contentType = xtextDocument.getContentType(cursorPosition);
    IContentAssistProcessor processor = contentAssistant.getContentAssistProcessor(contentType);
    if (processor != null) {
      return Tuples.create(processor.computeCompletionProposals(sourceViewer, cursorPosition), null);
    }
    return Tuples.create(new ICompletionProposal[0], null);
  } catch (BadLocationException e) {
    return Tuples.create(new ICompletionProposal[0], e);
  } finally {
    shell.dispose();
  }
}
 

/**
 * Requests proposals in the last location of the given editor.
 */
protected ICompletionProposalHandle[] requestProposals(String mod1Contents, PyEdit editor) {
    editor.setSelection(mod1Contents.length(), 0);
    IContentAssistant contentAssistant = editor.getEditConfiguration().getContentAssistant(
            editor.getPySourceViewer());
    SimpleAssistProcessor processor = (SimpleAssistProcessor) contentAssistant
            .getContentAssistProcessor(IDocument.DEFAULT_CONTENT_TYPE);
    processor.doCycle(); //we want to show the default completions in this case (not the simple ones)
    ICompletionProposal[] props = processor.computeCompletionProposals(editor.getPySourceViewer(),
            mod1Contents.length());
    ArrayList<ICompletionProposalHandle> lst = new ArrayList<>(props.length);
    for (ICompletionProposal iCompletionProposal : props) {
        lst.add((ICompletionProposalHandle) iCompletionProposal);
    }

    return lst.toArray(new ICompletionProposalHandle[0]);
}
 

protected ICompletionProposal[] computeCompletionProposals(final IXtextDocument xtextDocument, int cursorPosition,
		XtextSourceViewerConfiguration configuration, ISourceViewer sourceViewer) throws BadLocationException {
	IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
	String contentType = xtextDocument.getContentType(cursorPosition);
	IContentAssistProcessor processor = contentAssistant.getContentAssistProcessor(contentType);
	if (processor != null) {
		return processor.computeCompletionProposals(sourceViewer, cursorPosition);
	}
	return new ICompletionProposal[0];
}
 

protected ICompletionProposal[] computeCompletionProposals(final IXtextDocument xtextDocument, int cursorPosition,
		XtextSourceViewerConfiguration configuration, ISourceViewer sourceViewer) throws BadLocationException {
	IContentAssistant contentAssistant = configuration.getContentAssistant(sourceViewer);
	String contentType = xtextDocument.getContentType(cursorPosition);
	IContentAssistProcessor processor = contentAssistant.getContentAssistProcessor(contentType);
	if (processor != null) {
		return processor.computeCompletionProposals(sourceViewer, cursorPosition);
	}
	return new ICompletionProposal[0];
}
 

private ICompletionProposal[] computeCompletionProposals(
		final IXtextDocument xtextDocument, int cursorPosition,
		XtextSourceViewerConfiguration configuration,
		ISourceViewer sourceViewer) throws BadLocationException {
	IContentAssistant contentAssistant = configuration
			.getContentAssistant(sourceViewer);
	String contentType = xtextDocument.getContentType(cursorPosition);
	IContentAssistProcessor processor = contentAssistant
			.getContentAssistProcessor(contentType);
	if (processor != null) {
		return processor.computeCompletionProposals(sourceViewer,
				cursorPosition);
	}
	return new ICompletionProposal[0];
}
 

public ICompletionProposal[] computeCompletionProposals(final XtextEditor editorForCompletion, final XtextEditor dirtyEditor, final int cursorPosition) throws BadLocationException {
  this.syncUtil.waitForReconciler(dirtyEditor);
  final ISourceViewer sourceViewer = editorForCompletion.getInternalSourceViewer();
  final IContentAssistant contentAssistant = editorForCompletion.getXtextSourceViewerConfiguration().getContentAssistant(sourceViewer);
  final String contentType = editorForCompletion.getDocument().getContentType(cursorPosition);
  final IContentAssistProcessor processor = contentAssistant.getContentAssistProcessor(contentType);
  if ((processor != null)) {
    return processor.computeCompletionProposals(sourceViewer, cursorPosition);
  }
  return null;
}
 

/**
 * Helper function to find the correct CompletionProposalComputer for the given offset.
 *
 * @param offset
 *          offset in test file
 * @return language and offset specific content assist proposal computer
 */
private CompletionProposalComputer createCompletionProposalComputer(final int offset) {
  XtextSourceViewerConfiguration configuration = getEditor().getXtextSourceViewerConfiguration();
  IContentAssistant contentAssistant = configuration.getContentAssistant(getViewer());
  IContentAssistProcessor contentAssistProcessor;
  try {
    contentAssistProcessor = contentAssistant.getContentAssistProcessor(getDocument().getContentType(offset));
  } catch (BadLocationException e) {
    contentAssistProcessor = getTestUtil().get(IContentAssistProcessor.class);
  }
  if (contentAssistProcessor == null) {
    contentAssistProcessor = getTestUtil().get(IContentAssistProcessor.class);
  }
  return new CompletionProposalComputer((State) contentAssistProcessor, (ITextViewer) getViewer(), offset);
}