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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (c) 2017, VU University Amsterdam
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(jquery, []).
:- use_module(library(http/html_head)).
:- use_module(library(http/http_server_files), []).
:- use_module(library(settings)).
:- use_module(library(broadcast)).
:- setting(version, atom, '@JQUERYFILE@',
'File name for jquery.js, served as HTML resource "jquery"').
/** <module> Provide JQuery
This module provides the HTML resource `jquery`. To get the default
version of jquery included in a web page, make sure this file is loaded
and include the following into the HTML generation DCG.
==
html_requires(jquery),
==
The file served is determined by the setting `jquery:version` and loaded
from the file search path `js`, the default for which is provided by
library(http/http_server_files).
Note that including jquery into the HTTP infrastructure is not ideal.
However, components, such as PlDoc and Pengines as well as user
applications require jquery, causing this JavaScript to be installed in
many places. That is even worse.
# Using your own copy
To use your own copy of jquery, add your jquery file to a directory in
the `js` file search path (see file_search_path/2 and
absolute_file_name/3) and set `jquery:version` to the file version you
provided. Alternatively, you can define the html resource `jquery`
before loading this file.
*/
jquery_dir('@JQUERYDIR@').
global_jquery :-
jquery_dir(JQuery),
is_absolute_file_name(JQuery).
:- if(global_jquery).
:- multifile user:file_search_path/2.
user:file_search_path(js, Dir) :-
jquery_dir(Dir).
:- endif.
register_jquery :-
setting(version, JQuery0),
backward_compatibility_hack(JQuery0, JQuery),
html_resource(jquery,
[ virtual(true),
requires([ js(JQuery)
])
]).
% Older versions of this library used only the jQuery version as setting
% value. As Debian provides central jQuery files and uses a different
% naming convention, we now use the complete file name. The first clause
% recognises the old setting.
backward_compatibility_hack(Version, File) :-
sub_atom(Version, 0, 1, _, C0),
char_type(C0, digit),
!,
atomic_list_concat(['jquery-', Version, '.js'], File).
backward_compatibility_hack(File, File).
:- if(\+html_current_resource(jquery)).
:- initialization register_jquery.
:- listen(settings(changed(jquery:version, _, _)),
register_jquery).
:- endif.
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