Examples of com.google.dart.engine.ast.visitor.NodeLocator

Package com.google.dart.engine.ast.visitor

Examples of com.google.dart.engine.ast.visitor.NodeLocator

com.google.dart.engine.ast.visitor.NodeLocator
Instances of the class {@code NodeLocator} locate the {@link AstNode AST node} associated with asource range, given the AST structure built from the source. More specifically, they will return the {@link AstNode AST node} with the shortest length whose source range completely encompassesthe specified range. @coverage dart.engine.ast

    CompilationUnit unit = getUnit();
    if (unit == null) {
      return null;
    }
    int offset = getNameOffset();
    AstNode node = new NodeLocator(offset).searchWithin(unit);
    if (node == null) {
      return null;
    }
    return node.getAncestor(clazz);
  }

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    }
    CompilationUnit unit = parseCompilationUnit(source);
    if (unit == null) {
      return null;
    }
    NodeLocator locator = new NodeLocator(element.getNameOffset());
    AstNode nameNode = locator.searchWithin(unit);
    while (nameNode != null) {
      if (nameNode instanceof AnnotatedNode) {
        Comment comment = ((AnnotatedNode) nameNode).getDocumentationComment();
        if (comment == null) {
          return null;

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  /**
   * If the given {@link AstNode} has an {@link Element} at the given offset, then returns
   * {@link Reference} with this {@link Element}.
   */
  private Reference getReferenceAtNode(AstNode root, int offset) {
    AstNode node = new NodeLocator(offset).searchWithin(root);
    if (node != null) {
      Element element = ElementLocator.locate(node);
      return new Reference(element, node.getOffset(), node.getLength());
    }
    return null;

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    return expression.getOffset();
  }


  @Override
  public Reference getReference(int offset) {
    AstNode node = new NodeLocator(offset).searchWithin(expression);
    if (node != null) {
      Element element = ElementLocator.locate(node);
      return new Reference(element, node.getOffset(), node.getLength());
    }
    return null;

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   * Returns the {@link Expression} that is part of the given root {@link AstNode} and encloses the
   * given offset.
   */
  private static Expression getExpressionAt(AstNode root, int offset) {
    if (root.getOffset() <= offset && offset <= root.getEnd()) {
      AstNode dartNode = new NodeLocator(offset).searchWithin(root);
      if (dartNode instanceof Expression) {
        return (Expression) dartNode;
      }
    }
    return null;

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    }
    //
    // Find the smallest AST node that encompasses the range of re-scanned tokens.
    //
    if (originalEnd < originalStart) {
      oldNode = new NodeLocator(originalStart).searchWithin(originalStructure);
    } else {
      oldNode = new NodeLocator(originalStart, originalEnd).searchWithin(originalStructure);
    }
    //
    // Find the token at which parsing is to begin.
    //
    int originalOffset = oldNode.getOffset();

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