(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

(** This module offers semi-structured pretty-printing. *)

(** Each annotation of the semi-structured document refers to the
    substring it annotates. *)
type 'annotation located = {
  annotation : 'annotation option;
  startpos   : int;
  endpos     : int
}

(** [rich_pp get_annotations ppcmds] returns the interpretation
    of [ppcmds] as a semi-structured document
    that represents (located) annotations of this string.
    The [get_annotations] function is used to convert tags into the desired
    annotation. *)
val rich_pp :
  (Pp.Tag.t -> 'annotation option) -> Pp.std_ppcmds ->
  'annotation located Xml_datatype.gxml

(** [annotations_positions ssdoc] returns a list associating each
    annotations with its position in the string from which [ssdoc] is
    built. *)
val annotations_positions :
  'annotation located Xml_datatype.gxml ->
  ('annotation * (int * int)) list

(** [xml_of_rich_pp ssdoc] returns an XML representation of the
    semi-structured document [ssdoc]. *)
val xml_of_rich_pp :
  ('annotation -> string) ->
  ('annotation -> (string * string) list) ->
  'annotation located Xml_datatype.gxml ->
  Xml_datatype.xml

(** {5 Enriched text} *)

type richpp
(** Type of text with style annotations *)

val richpp_of_pp : Pp.std_ppcmds -> richpp
(** Extract style information from formatted text *)

val richpp_of_xml : Xml_datatype.xml -> richpp
(** Do not use outside of dedicated areas *)

val richpp_of_string : string -> richpp
(** Make a styled text out of a normal string *)

val repr : richpp -> Xml_datatype.xml
(** Observe the styled text as XML *)

(** {5 Debug/Compat} *)

(** Represent the semi-structured document as a string, dropping any additional
    information. *)
val raw_print : richpp -> string
