[ide] Move common protocol library to its own folder/object.

The `ide` folder contains two different binaries, the language server
`coqidetop` and `coqide` itself.

Even if these binaries are in the same folder, the only thing they
have in common is that they link to the protocol files. In the OCaml
world, having "doubly" linked files in the same project is considered
a bit of an ugly practice, and some build tools such as Dune disallow it.q

Thus, to clean up the build, we move the common protocol files to its
own library `ideprotocol`.

This helps towards Dune integration and towards having an IDE
standalone target, such as the one that was implemented here:
https://github.com/ejgallego/coqide-exp

1 files changed, 31 insertions, 0 deletions

diff --git a/ide/protocol/xml_printer.mli b/ide/protocol/xml_printer.mli
new file mode 100644
index 000000000..178f7c808
--- /dev/null
+++ b/ide/protocol/xml_printer.mli
@@ -0,0 +1,31 @@
+(************************************************************************)
+(*         *   The Coq Proof Assistant / The Coq Development Team       *)
+(*  v      *   INRIA, CNRS and contributors - Copyright 1999-2018       *)
+(* <O___,, *       (see CREDITS file for the list of authors)           *)
+(*   \VV/  **************************************************************)
+(*    //   *    This file is distributed under the terms of the         *)
+(*         *     GNU Lesser General Public License Version 2.1          *)
+(*         *     (see LICENSE file for the text of the license)         *)
+(************************************************************************)
+
+type xml = Xml_datatype.xml
+
+type t
+type target = TChannel of out_channel | TBuffer of Buffer.t
+
+val make : target -> t
+
+(** Print the xml data structure to a source into a compact xml string (without
+ any user-readable formating ). *)
+val print : t -> xml -> unit
+
+(** Print the xml data structure into a compact xml string (without
+ any user-readable formating ). *)
+val to_string : xml -> string
+
+(** Print the xml data structure into an user-readable string with
+ tabs and lines break between different nodes. *)
+val to_string_fmt : xml -> string
+
+(** Print PCDATA as a string by escaping XML entities. *)
+val pcdata_to_string : string -> string