Java Code Examples for org.eclipse.xtext.ui.editor.contentassist.ContentAssistContext#getDocument()

private ICompletionProposal createProposal(ContentAssistContext context, String name, String value,
		String description, String rawTemplate, Image image, boolean isGenericProposal) {

	TemplateContextType contextType = getTemplateContextType();
	IXtextDocument document = context.getDocument();
	TemplateContext tContext = new DocumentTemplateContext(contextType, document, context.getOffset(), 0);
	Region replaceRegion = context.getReplaceRegion();

	// pre-populate ${name} and ${value} with given args
	if (isGenericProposal) {
		tContext.setVariable("name", name);
	}
	tContext.setVariable("value", value);

	return new StyledTemplateProposal(context, name, description, rawTemplate, isGenericProposal, tContext,
			replaceRegion, image);
}
 

/**
 * Positions created for template contexts have to be added to the document so they are updated when the document
 * is modified.
 * 
 * @since 2.8
 */
protected Position createPosition(ContentAssistContext context) {
	Position position = new Position(context.getReplaceRegion().getOffset(), context.getReplaceRegion().getLength());
	IDocument document = context.getDocument();
	if (document.containsPositionCategory(XTEXT_TEMPLATE_POS_CATEGORY)) {
		try {
			document.addPosition(XTEXT_TEMPLATE_POS_CATEGORY, position);
		} catch (Exception e) {
			log.error(e.getMessage(), e);
		}
	}
	return position;
}
 

protected TemplateContext doCreateTemplateContext(TemplateContextType contextType, ContentAssistContext context) {
	return new XtextTemplateContext(contextType, context.getDocument(),
			createPosition(context),
			context, getScopeProvider());
}
 

protected ICompletionProposal createOverrideMethodProposal(XtendTypeDeclaration model, IResolvedExecutable overrideable,
		final ContentAssistContext context, IProposalConflictHelper conflictHelper) {
	IXtextDocument document = context.getDocument();
	XtextResource resource = (XtextResource) model.eResource();
	int offset = context.getReplaceRegion().getOffset();
	int currentIndentation = appendableFactory.getIndentationLevelAtOffset(offset, document, resource);
	final int indentationLevel = currentIndentation == 0 ? 1 : currentIndentation;
	ReplacingAppendable appendable = appendableFactory.create(document, resource, offset, context.getReplaceRegion().getLength(), new OptionalParameters() {{ 
				ensureEmptyLinesAround = true;
				baseIndentationLevel = indentationLevel;	
			}});
	final String simpleName;
	JvmExecutable declaration = overrideable.getDeclaration();
	if (overrideable instanceof IResolvedOperation) {
		implementor.appendOverrideFunction(model, (IResolvedOperation) overrideable, appendable);
		simpleName = overrideable.getDeclaration().getSimpleName();
	} else if (model instanceof XtendClass) {
		implementor.appendConstructorFromSuper((XtendClass) model, (IResolvedConstructor) overrideable, appendable);
		simpleName = "new";
	} else {
		return null;
	}
	String code = appendable.getCode();
	if (!isValidProposal(code.trim(), context, conflictHelper) && !isValidProposal(simpleName, context, conflictHelper))
		return null;
	ImageDescriptor imageDescriptor = images.forOperation(declaration.getVisibility(), adornments.getOverrideAdornment(declaration));
	ImportOrganizingProposal completionProposal = createCompletionProposal(appendable, context.getReplaceRegion(),
			getLabel(overrideable), imageHelper.getImage(imageDescriptor));
	Matcher matcher = bodyExpressionPattern.matcher(code);
	if (matcher.find()) {
		int bodyExpressionLength = matcher.end(1) - matcher.start(1);
		int bodyExpressionStart = matcher.start(1) + appendable.getTotalOffset() - completionProposal.getReplacementOffset();
		if (bodyExpressionLength == 0) {
			completionProposal.setCursorPosition(bodyExpressionStart);
		} else {
			completionProposal.setSelectionStart(completionProposal.getReplacementOffset() + bodyExpressionStart);
			completionProposal.setSelectionLength(bodyExpressionLength);
			completionProposal.setAutoInsertable(false);
			completionProposal.setCursorPosition(bodyExpressionStart + bodyExpressionLength);
			completionProposal.setSimpleLinkedMode(context.getViewer(), '\t');
		}
	}
	completionProposal.setPriority(getPriority(model, declaration, context));
	completionProposal.setMatcher(new PrefixMatcher() {

		@Override
		public boolean isCandidateMatchingPrefix(String name, String prefix) {
			PrefixMatcher delegate = context.getMatcher();
			boolean result = delegate.isCandidateMatchingPrefix(simpleName, prefix);
			return result;
		}
		
	});
	return completionProposal;
}