Function isWithinNode

packages/language-service/src/template_target.ts:775–789

Checks whether a position is within an AST node.

(position: number, node: TmplAstNode)

/** Checks whether a position is within an AST node. */
function isWithinNode(position: number, node: TmplAstNode): boolean {
  if (!(node instanceof TmplAstHostElement)) {
    return isWithin(position, getSpanIncludingEndTag(node));
  }

  // Host elements are special in that they don't have a contiguous source span. E.g. some bindings
  // can be in the `host` literal in the decorator while others are on class members. That's why we
  // need to check each binding, rather than the host element itself.
  return (
    (node.bindings.length > 0 &&
      node.bindings.some((binding) => isWithin(position, binding.sourceSpan))) ||
    (node.listeners.length > 0 &&
      node.listeners.some((listener) => isWithin(position, listener.sourceSpan)))
  );
}

/** Checks whether a position is within the body or the start syntax of a node. */
function isWithinTagBody(position: number, node: TmplAstElement | TmplAstComponent): boolean {