1/*  Part of XPCE --- The SWI-Prolog GUI toolkit
    2
    3    Author:        Jan Wielemaker and Anjo Anjewierden
    4    E-mail:        J.Wielemaker@cs.vu.nl
    5    WWW:           http://www.swi-prolog.nl/projects/xpce/
    6    Copyright (c)  2011-2013, University of Amsterdam
    7                              VU University Amsterdam
    8    All rights reserved.
    9
   10    Redistribution and use in source and binary forms, with or without
   11    modification, are permitted provided that the following conditions
   12    are met:
   13
   14    1. Redistributions of source code must retain the above copyright
   15       notice, this list of conditions and the following disclaimer.
   16
   17    2. Redistributions in binary form must reproduce the above copyright
   18       notice, this list of conditions and the following disclaimer in
   19       the documentation and/or other materials provided with the
   20       distribution.
   21
   22    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   23    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   24    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   25    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   26    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   27    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   28    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   29    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   30    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   32    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   33    POSSIBILITY OF SUCH DAMAGE.
   34*/
   35
   36:- module(link_xpce, []).   37:- set_prolog_flag(generate_debug_info, true).   38
   39/** <module> Associate XPCE with SWI-Prolog
   40
   41This  file  initialises  XPCE,  the  SWI-Prolog   native  GUI.  XPCE  is
   42initialised only if it is detected.
   43
   44The source-location of this file  is packages/xpce/swipl/swipl-rc. It is
   45installed as <plbase>/<exe-base>.rc, where   <exe-base> is =|swipl-win|=
   46to associate with the SWI-Prolog gui  application on Windows and =swipl=
   47on Unix/X11 platforms.
   48*/
   49
   50:- op(200, fy,  user:(@)).   51:- op(250, yfx, user:(?)).   52:- op(990, xfx, user:(:=)).   53
   54:- multifile
   55	user:file_search_path/2.   56
   57:- dynamic
   58	pcehomestore_/1.   59:- volatile
   60	pcehomestore_/1.   61
   62pcehome_(Home) :-
   63	pcehomestore_(Home), !.
   64pcehome_(Home) :-
   65	(   getenv('XPCEHOME', RawHome)
   66	;   current_prolog_flag(home, PlHome),
   67	    (   current_prolog_flag(xpce_version, Version),
   68		atom_concat('/xpce-', Version, Suffix)
   69	    ;   Suffix = '/xpce'
   70	    ),
   71	    atom_concat(PlHome, Suffix, RawHome)
   72	),
   73	exists_directory(RawHome), !,
   74	absolute_file_name(RawHome, Home),
   75	asserta(pcehomestore_(Home)).
   76
   77user:file_search_path(pce, PceHome) :-
   78	pcehome_(PceHome).
   79user:file_search_path(library, pce('prolog/lib')).
   80user:file_search_path(foreign, pce(ArchLib)) :-
   81	current_prolog_flag(arch, Arch),
   82	atom_concat('lib/', Arch, ArchLib).
   83
   84% We added a directory to the autoload directories: force reloading the
   85% index
   86:- reload_library_index.   87
   88gui_setup_ :-
   89	current_prolog_flag(gui, true), !.
   90gui_setup_ :-
   91	(   getenv('DISPLAY', D), D \== ''
   92	;   current_prolog_flag(windows, true)
   93	), !,
   94	create_prolog_flag(gui, true, []),
   95	menu_setup_,
   96	editor_setup,
   97	load_files(user:library(swi_hooks), [silent(true)]).	% help, etc.
   98
   99menu_setup_ :-					% plwin.exe menus
  100	current_prolog_flag(console_menu, true),
  101	load_files(user:library(win_menu), [silent(true)]).
  102menu_setup_.
  103
  104editor_setup :-
  105	current_prolog_flag(editor, default), !,
  106	set_prolog_flag(editor, pce_emacs).
  107editor_setup.
  108
  109pce_setup_ :-
  110	current_prolog_flag(xpce, true), !.
  111pce_setup_ :-
  112	current_prolog_flag(argv, Argv),
  113	\+ memberchk('--nopce', Argv),	% explicitely no XPCE
  114	pcehome_(PceHome),
  115	exists_directory(PceHome),
  116	gui_setup_,
  117	(   memberchk('--pce', Argv)
  118	;   current_prolog_flag(executable, Executable),
  119	    file_base_name(Executable, Base),
  120	    sub_atom_icasechk(Base, _, pce)
  121	), !,
  122	load_files(user:library(pce), [silent(true)]).
  123pce_setup_.
  124
  125:- initialization pce_setup_.