protected static IASTNode findEnclosingNode(IFortranAST ast, ITextSelection selection) {
Token firstToken = findFirstTokenAfter(ast, selection.getOffset());
Token lastToken =
findLastTokenBefore(
ast, OffsetLength.getPositionPastEnd(selection.getOffset(), selection.getLength()));
if (firstToken == null || lastToken == null) return null;
for (IASTNode parent = lastToken.getParent(); parent != null; parent = parent.getParent())
if (contains(parent, firstToken)) return parent;
return null;
}
private static boolean contains(IASTNode target, Token token) {
for (IASTNode node = token.getParent(); node != null; node = node.getParent())
if (node == target) return true;
return false;
}