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/* Part of XPCE --- The SWI-Prolog GUI toolkit
Author: Jan Wielemaker and Anjo Anjewierden
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org/packages/xpce/
Copyright (c) 1985-2022, University of Amsterdam
VU University Amsterdam
CWI, Amsterdam
SWI-Prolog Solutions b.v.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Module PCE. This module defines the core of XPCE. It is designed in
such a way that it may be compiled using the SWI-Prolog qcompile/1
compiler, which makes XPCE an autoloadable module of SWI-Prolog.
Various things are Prolog-implementation specific in this module and
therefore each Prolog system will require a different version of this
module.
This module only defines some paths, some things to make the .qlf
compiler work on it and finally it just loads the XPCE modules and
reexports the content of these files.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
:- module(pce,
[ new/2, free/1, % pce_principal predicates
send/2, send/3, send/4, send/5, send/6, send/7,
send/8,
get/3, get/4, get/5, get/6, get/7, get/8,
send_class/3,
get_class/4,
object/1, object/2,
pce_global/2, % pce_global
pce_autoload/2, % pce_autoload
pce_autoload_all/0,
pce_term_expansion/2,
pce_compiling/1, % -Class
pce_compiling/2, % -Class, -Path
pce_begin_recording/1,
pce_end_recording/0,
pce_register_class/1,
pce_extended_class/1,
pce_begin_class_definition/4,
pce_prolog_class/1,
pce_prolog_class/2,
pce_catch_error/2, % pce_error
pce_open/3,
in_pce_thread/1, % :Goal
in_pce_thread_sync/1, % :Goal
set_pce_thread/0,
pce_thread/1, % -Thread
pce_dispatch/0,
op(200, fy, @),
op(250, yfx, ?),
op(800, xfx, :=)
]).
:- multifile
on_load/0.
:- set_prolog_flag(generate_debug_info, false).
:- meta_predicate
in_pce_thread_sync(0).
/********************************
* LOAD COMMON PLATFORM *
********************************/
:- multifile user:file_search_path/2.
user:file_search_path(pce_boot, pce(prolog/boot)).
:- load_files([ pce_boot(pce_expand),
pce_boot(pce_pl),
pce_boot(pce_principal),
pce_boot(pce_error),
pce_boot(pce_global),
pce_boot(pce_expansion),
pce_boot(pce_realise),
pce_boot(pce_goal_expansion),
pce_boot(pce_autoload),
pce_boot(pce_editor),
pce_boot(pce_keybinding),
pce_boot(pce_portray),
'english/pce_messages'
],
[ qcompile(part), % compile boot files as part of pce.qlf
silent(true)
]).
:- if(current_prolog_flag(threads, true)).
:- use_module(pce_dispatch).
:- endif.
%! pce_thread(-Thread) is det.
%
% True if Thread is the Prolog thread that runs the graphics
% message loop.
%
% @see pce_dispatch/1.
:- current_prolog_flag(threads, HasThreads),
create_prolog_flag(xpce_threaded, HasThreads, [keep(true)]).
:- dynamic
pce_thread/1.
%! in_pce_thread_sync(:Goal) is semidet.
%
% Same as in_pce_thread/1, but wait for Goal to be completed.
% Success depends on the success of executing Goal. If Goal throws
% an exception, this exception is re-thrown by in_pce_thread/1.
%
% Possible bindings of Goal are returned, but be aware that the
% term has been _copied_. If in_pce_thread_sync/1 is called in the
% thread running pce, it behaves as once/1.
in_pce_thread_sync(Goal) :-
thread_self(Me),
pce_thread(Me),
!,
Goal,
!.
in_pce_thread_sync(Goal) :-
term_variables(Goal, Vars),
pce_principal:in_pce_thread_sync2(Goal-Vars, Vars).
:- if(current_prolog_flag(threads, true)).
start_dispatch :-
( current_predicate(pce_dispatch:start_dispatch/0)
-> pce_dispatch:start_dispatch
; true
).
:- initialization
start_dispatch.
:- endif.
set_version :-
current_prolog_flag(version_data, swi(Major, Minor, Patch, _)),
format(string(PlId),
'SWI-Prolog version ~w.~w.~w', [Major, Minor, Patch]),
send(@prolog, system, PlId).
:- initialization set_version.
get_pce_version :-
( current_prolog_flag(xpce_version, _)
-> true
; get(@pce, version, name, Version),
create_prolog_flag(xpce_version, Version, [])
).
:- initialization get_pce_version.
run_on_load :-
forall(on_load, true).
:- initialization run_on_load.
/*******************************
* CONSOLE *
*******************************/
%:- send(@pce, console_label, 'XPCE/SWI-Prolog').
/********************************
* PROLOG LIBRARIES *
********************************/
:- multifile
user:file_search_path/2.
user:file_search_path(demo, pce('prolog/demo')).
user:file_search_path(contrib, pce('prolog/contrib')).
user:file_search_path(image, pce(bitmaps)).
/*******************************
* HOOKS *
*******************************/
:- use_module(library(swi_hooks)).
/*******************************
* EDIT HOOKS *
*******************************/
% make sure SWI-Prolog edit/0 loads the XPCE edit hooks.
:- multifile
prolog_edit:load/0,
prolog:locate_clauses/2.
prolog_edit:load :-
ensure_loaded(library(swi_edit)).
/*******************************
* LIST HOOKS *
*******************************/
%! prolog:locate_clauses(Term, Refs)
%
% Locate a list of clause-references from a method-specification
% like Class->Method.
%
% see library(listing).
prolog:locate_clauses(Term, Refs) :-
( Term = ->(_,_)
; Term = <-(_,_)
),
!,
findall(R, method_clause(Term, R), Refs).
match_id(->(Class, Method), Id) :-
atomic(Class), atomic(Method),
!,
atomic_list_concat([Class, (->), Method], Id).
match_id(->(_Class, _Method), _Id).
match_id(<-(Class, Method), Id) :-
atomic(Class), atomic(Method),
!,
atomic_list_concat([Class, (<-), Method], Id).
match_id(<-(_Class, _Method), _Id).
method_clause(->(Class, Send), Ref) :-
match_id((Class->Send), Id),
clause(pce_principal:send_implementation(Id, _M, _O), _B, Ref),
atom(Id),
atomic_list_concat([Class,Send], '->', Id).
method_clause(<-(Class, Get), Ref) :-
match_id(<-(Class, Get), Id),
clause(pce_principal:get_implementation(Id, _M, _O, _R), _B, Ref),
atom(Id),
atomic_list_concat([Class,Get], '->', Id).
/*******************************
* MESSAGES *
*******************************/
:- multifile
prolog:message/3.
prolog:message(Spec) -->
pce_message(Spec).
prolog:message(context_error(Goal, Context, What)) -->
[ '~w: ~w '-[Goal, What] ],
pce_message_context(Context).
prolog:message(type_error(Goal, ArgN, Type, _Value)) -->
[ '~w: argument ~w must be a ~w'-[Goal, ArgN, Type], nl ].
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