1/* Part of ClioPatria SeRQL and SPARQL server 2 3 Author: Jan Wielemaker 4 E-mail: J.Wielemaker@vu.nl 5 WWW: http://www.swi-prolog.org 6 Copyright (c) 2010-2018, 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(cp_label, 37 [ turtle_label//1, % +Literal 38 rdf_link//1, % +RDFTerm 39 rdf_link//2, % +RDFTerm, +Options 40 resource_link/2 % +URI, -URL 41 ]). 42:- use_module(library(error)). 43:- use_module(library(option)). 44:- use_module(library(sgml)). 45:- use_module(library(sgml_write)). 46:- use_module(library(aggregate)). 47:- use_module(library(semweb/rdf_db)). 48:- use_module(library(semweb/rdf_label)). 49:- use_module(library(http/html_write)). 50:- use_module(library(http/http_dispatch)). 51:- if(exists_source(library(semweb/rdf11))). 52:- use_module(library(semweb/rdf11), [rdf_lexical_form/2]). 53:- endif. 54 55:- use_module(cliopatria(hooks)).
72turtle_label(R) --> 73 turtle_label(R, []). 74 75turtle_label(R, _) --> 76 { atom(R), 77 rdf_global_id(NS:Local, R), ! 78 }, 79 html([span(class(prefix), NS), ':', span(class(local), Local)]). 80turtle_label(R, Options) --> 81 { atom(R), 82 rdf_display_label(R, Lang, LabelText), 83 Lang \== url, 84 LabelText \== '', 85 truncate_text(LabelText, Show, Options) 86 }, 87 html(Show). 88turtle_label(R, Options) --> 89 { rdf_is_bnode(R) }, 90 bnode_label(R, Options), 91 !. 92turtle_label(R, _) --> 93 { atom(R) }, 94 !, 95 html(['<',R,'>']). 96turtle_label(literal(Lit), Options) --> 97 !, 98 literal_label(Lit, Options). 99turtle_label(@(String,Lang), Options) --> 100 !, 101 literal_label(lang(Lang, String), Options). 102:- if(current_predicate(rdf_lexical_form/2)). 103turtle_label(^^(Value,Type), Options) --> 104 !, 105 ( {rdf_equal(Type, xsd:string)} 106 -> literal_label(type(Type, Value), Options) 107 ; {rdf_lexical_form(^^(Value,Type), ^^(String,_))}, 108 literal_label(type(Type, String), Options) 109 ). 110:- endif. 111 112literal_label(type(Type, Value), Options) --> 113 !, 114 { truncate_text(Value, Show, Options) }, 115 html(span(class(literal), 116 [span(class(oquote), '"'), span(class(l_text), Show), span(class(cquote), '"'), 117 span(class(l_type), '^^'), \turtle_label(Type)])). 118literal_label(lang(Lang, Value), Options) --> 119 !, 120 { truncate_text(Value, Show, Options) }, 121 html(span(class(literal), 122 [span(class(oquote), '"'), span(class(l_text), Show), span(class(cquote), '"'), 123 span(class(l_lang), '@'), span(class(lang), Lang)])). 124literal_label(Value, Options) --> 125 { truncate_text(Value, Show, Options) }, 126 html(span(class(literal), 127 [span(class(oquote), '"'), span(class(l_text), Show), span(class(cquote), '"')])). 128 129truncate_text(Text, Text, []) :- !. 130truncate_text(Text, Truncated, Options) :- 131 option(max_length(Len), Options), 132 !, 133 truncate_atom(Text, Len, Truncated). 134truncate_text(Text, Text, _).
149bnode_label(R, _) --> 150 cliopatria:bnode_label(R), 151 !. 152bnode_label(R, Options) --> 153 { rdf_has(R, rdf:value, Value), 154 ( Value = literal(_) 155 ; \+ rdf_is_bnode(Value) 156 ) 157 }, 158 !, 159 html(span([ class(rdf_bnode), 160 title('RDF bnode using rdf:value') 161 ], 162 ['[', \turtle_label(Value, Options), '...]'])). 163bnode_label(R, Options) --> 164 { rdf_collection_list(R, List), 165 !, 166 length(List, Len), 167 format(string(Title), 'RDF collection with ~D members', Len) 168 }, 169 html(span([ class(rdf_list), 170 title(Title) 171 ], 172 ['(', \collection_members(List, 0, Len, 5, Options), ')'])). 173 174collection_members([], _, _, _, _) --> []. 175collection_members(_, Max, Total, Max, _) --> 176 !, 177 { Left is Total - Max }, 178 html('... ~D more'-[Left]). 179collection_members([H|T], I, Total, Max, Options) --> 180 turtle_label(H, Options), 181 ( { T == [] } 182 -> [] 183 ; html(','), 184 { I2 is I + 1 }, 185 collection_members(T, I2, Total, Max, Options) 186 ). 187 188 189rdf_collection_list(R, []) :- 190 rdf_equal(rdf:nil, R), 191 !. 192rdf_collection_list(R, [H|T]) :- 193 rdf_has(R, rdf:first, H), 194 rdf_has(R, rdf:rest, RT), 195 rdf_collection_list(RT, T).
target attribute.
This predicate creates two types of links. Resources are linked
to the handler implementing list_resource using r=<resource>
and literals that appear multiple times are linked to
list_triples_with_object using a Prolog representation of the
literal.
This predicate can be hooked using display_link//2.
236rdf_link(R) --> 237 rdf_link(R, []). 238 239rdf_link(R, Options) --> 240 cliopatria:display_link(R, Options), 241 !. 242rdf_link(R, Options) --> 243 { atom(R), 244 !, 245 resource_link(R, HREF), 246 ( rdf(R, _, _) 247 -> Class = r_def 248 ; rdf_graph(R) 249 -> Class = r_graph 250 ; Class = r_undef 251 ), 252 link_options(Extra, Options) 253 }, 254 html(a([class(['rdf-r',Class]), href(HREF)|Extra], 255 \resource_label(R, Options))). 256rdf_link(Literal, Options) --> 257 { aggregate_all(count, literal_occurrence(Literal, Options), Count), 258 Count > 1, 259 !, 260 format(string(Title), 'Used ~D times', [Count]), 261 term_to_atom(Literal, Atom), 262 http_link_to_id(list_triples_with_object, [l=Atom], HREF), 263 link_options(Extra, Options) 264 }, 265 html(a([ class(l_count), 266 href(HREF), 267 title(Title) 268 | Extra 269 ], 270 \turtle_label(Literal))). 271rdf_link(Literal, _) --> 272 turtle_label(Literal). 273 274literal_occurrence(Literal, Options) :- 275 Literal = literal(_), 276 !, 277 ( option(graph(Graph), Options) 278 -> rdf_db:rdf(_,_,Literal,Graph) 279 ; rdf_db:rdf(_,_,Literal) 280 ). 281:- if(current_predicate(rdf11:rdf/4)). 282literal_occurrence(Literal, Options) :- 283 ( option(graph(Graph), Options) 284 -> rdf11:rdf(_,_,Literal,Graph) 285 ; rdf11:rdf(_,_,Literal) 286 ). 287:- endif. 288 289link_options(LinkOptions, Options) :- 290 option(target(Target), Options), 291 !, 292 LinkOptions = [target(Target)]. 293link_options([], _).
list_resource using the parameter r. See
cpa_browse:list_resource/1. This predicate calls the hook
resource_link/2, which allows for overruling the
default.305resource_link(R, HREF) :- 306 cliopatria:resource_link(R, HREF), 307 !. 308resource_link(R, HREF) :- 309 http_link_to_id(list_resource, [r=R], HREF). 310 311resource_label(R, Options) --> 312 { debug(rdf(label), 'resource_label(~p,~p)', 313 [R, Options]), 314 option(resource_format(Format), Options) 315 }, 316 !, 317 resource_flabel(Format, R, Options). 318resource_label(R, Options) --> 319 turtle_label(R, Options). 320 321resource_flabel(plain, R, _) --> 322 !, 323 html(R). 324resource_flabel(label, R, Options) --> 325 !, 326 ( { rdf_display_label(R, Label), 327 truncate_text(Label, Show, Options) 328 } 329 -> html([span(class(r_label), Show)]) 330 ; turtle_label(R) 331 ). 332resource_flabel(nslabel, R, _Options) --> 333 { ( rdf_is_bnode(R) 334 -> NS = '_' 335 ; rdf_global_id(NS:_Local, R) 336 -> true 337 ; NS = '?' 338 ), 339 !, 340 rdf_display_label(R, Label) 341 }, 342 html([span(class(prefix),NS),':',span(class(r_label),Label)]). 343resource_flabel(_, R, Options) --> 344 turtle_label(R, Options)
Support for showing labels
This module provides HTML components to display labels for resources.