com.intellij.psi.util.PsiTreeUtil#getTopmostParentOfType ( )源码实例Demo

private static String tryResolveFullyQualifiedHaxeReferenceExpression(PsiElement type) {
  if (type instanceof HaxeReferenceExpression) {
    HaxeReferenceExpression topmostParentOfType = PsiTreeUtil.getTopmostParentOfType(type, HaxeReferenceExpression.class);

    if (topmostParentOfType == null) {
      topmostParentOfType = (HaxeReferenceExpression)type;
    }

    HaxeClass haxeClass = findClassByQName(topmostParentOfType.getText(), topmostParentOfType.getContext());
    if (haxeClass != null) {
      return topmostParentOfType.getText();
    }

    PsiElement parent = type.getParent();
    HaxeClass classByQName = findClassByQName(parent.getText(), parent.getContext());
    if (classByQName != null) {
      return parent.getText();
    }
  }

  return null;
}
 

public void highlight(PsiElement element, AnnotationHolder holder) {
    XQueryMisplacedComment misplacedComment = PsiTreeUtil.getTopmostParentOfType(element, XQueryMisplacedComment.class);
    if (isTheStartingElementOfMisplacedComment(element, misplacedComment)) {
        Annotation annotation = holder.createErrorAnnotation(misplacedComment, "Comments cannot be used here.");
        annotation.setHighlightType(ProblemHighlightType.GENERIC_ERROR);
    }
}
 

@RequiredReadAction
@Nullable
@Override
public HighlightInfoFactory checkImpl(@Nonnull CSharpLanguageVersion languageVersion, @Nonnull CSharpHighlightContext highlightContext, @Nonnull DotNetVariable element)
{
	String name = element.getName();
	if(name == null)
	{
		return null;
	}

	CSharpSimpleLikeMethodAsElement method = PsiTreeUtil.getTopmostParentOfType(element, CSharpSimpleLikeMethodAsElement.class);
	if(method == null)
	{
		return null;
	}

	AnalyzeContext context = CachedValuesManager.getCachedValue(method, () -> CachedValueProvider.Result.create(new AnalyzeContext(method), PsiModificationTracker.MODIFICATION_COUNT));

	Collection<DotNetVariable> variables = context.myVariables.get(name);
	if(variables.size() <= 1)
	{
		return null;
	}

	DotNetVariable prevVariable = null;
	for(DotNetVariable variable : variables)
	{
		if(variable == element)
		{
			break;
		}

		prevVariable = variable;
	}

	if(prevVariable != null)
	{
		//return newBuilder(getNameIdentifier(element), name, name, getScope(prevVariable, element));
	}
	return null;
}
 

@Override
protected boolean isInContext(PsiElement element) {
    PsiElement topmostExpressionElement = PsiTreeUtil.getTopmostParentOfType(element, XQueryExprSingle.class);
    PsiElement topmostElement = XQueryPsiImplUtil.getTopmostElementWithTheSameOffset(element);
    return topmostExpressionElement != null && isNotBeforeModuleDeclaration(topmostElement);
}