(*---------------------------------------------------------------------------
  Copyright (c) 2025 Anil Madhavapeddy <anil@recoil.org>. All rights reserved.
  SPDX-License-Identifier: MIT
 ---------------------------------------------------------------------------*)

(** Source element context validation checker.

    This checker validates that [<source>] element attributes are appropriate
    for the parent context. The allowed attributes differ based on whether
    the source is inside [<picture>], [<video>], or [<audio>].

    {2 Context-Dependent Rules}

    In [<picture>] context:
    - [srcset] is required
    - [src] is not allowed
    - [media] and [type] are allowed

    In [<video>] or [<audio>] context:
    - [src] is required
    - [srcset] and [sizes] are not allowed
    - [type] is allowed for MIME type hints

    {2 Error Messages}

    - Missing required attributes for the context
    - Attributes not allowed in the current context

    @see <https://html.spec.whatwg.org/multipage/embedded-content.html#the-source-element>
         HTML Standard: The source element
*)

val checker : Checker.t
(** The source element context checker instance. *)