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_.