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% Copyright 2018 by Till Tantau
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/generic/pgf/licenses/LICENSE for more details.
\ProvidesFileRCS{tikzlibraryrdf.code.tex}
\def\tikz@add@rdf@pre@option#1{\expandafter\def\expandafter\tikz@rdf@pre@options\expandafter{\tikz@rdf@pre@options#1}}%
\def\tikz@add@rdf@post@option#1{\expandafter\def\expandafter\tikz@rdf@post@options\expandafter{\tikz@rdf@post@options#1}}%
\let\tikz@rdf@pre@options\pgfutil@empty
\let\tikz@rdf@post@options\pgfutil@empty
\tikzset{
%
% Switching on the engine
%
rdf engine on/.code={%
\def\tikz@clear@rdf@options{\let\tikz@rdf@pre@options\pgfutil@empty\let\tikz@rdf@post@options\pgfutil@empty}%
\def\tikz@do@rdf@pre@options{\tikz@rdf@pre@options\let\tikz@rdf@pre@options\pgfutil@empty}%
\def\tikz@do@rdf@post@options{\tikz@rdf@post@options\let\tikz@rdf@post@options\pgfutil@empty}%
\pgfkeys{/tikz/rdf engine/.code=\tikz@add@rdf@pre@option{\pgfqkeys{/tikz/rdf engine}{##1}}}%
},
rdf engine/.cd,
%
every statement/.style=,
%
% Namespaces
%
prefix/.code=\pgfrdfprefix{#1},
%
% Core commands
%
statement/.code={%
{%
\pgfkeys{/tikz/rdf engine/every statement}%
\pgfqkeys{/tikz/rdf engine/statements}{#1}%
\iftikz@rdf@is@a@container\tikz@rdf@init@container\fi%
\iftikz@rdf@is@a@member\tikz@rdf@make@member\fi%
\tikz@rdf@make@triple%
\expandafter}\tikz@rdf@action%
},
get scope curie/.code={%
\ifx\tikz@id@name\pgfutil@empty%
\def\tikz@id@name{@rdf}%
\fi%
\pgfidrefnextuse\tikz@temp{\tikz@id@name}%
\edef#1{\tikzrdfhashmark\tikz@temp}%
},
get new resource curie/.code={%
\pgfsys@new@id\tikz@temp%
\edef#1{\tikzrdfhashmark\tikz@temp}%
},
scope is new context/.style={get scope curie=\tikzrdfcontext}
}%
\def\tikzrdfcontext{\tikzrdfhashmark}%empty by default
\tikzset{
rdf engine/statements/.cd,
%
% Core properties of statements
%
subject/.code={%
\def\tikz@rdf@target{\tikz@rdf@subject}%
\tikz@rdf@parse{#1}%
},
predicate/.code={%
\def\tikz@rdf@target{\tikz@rdf@predicate}%
\tikz@rdf@parse{#1}%
},
object/.code={%
\let\tikz@rdf@object@literal\relax%
\let\tikz@rdf@object\relax%
\def\tikz@temp{#1}%
\ifx\tikz@temp\tikz@rdf@current@scope@text%
\tikz@rdf@object@scope@contenttrue%
\else%
\tikz@rdf@object@scope@contentfalse%
\def\tikz@rdf@target{\tikz@rdf@object}%
\tikz@rdf@parse{#1}%
\fi%
},
%
% Shorthands
%
has type/.style={predicate=rdf:type,object={#1}},
%
% Containers
%
is a bag/.style={has type=rdf:Bag, is a container},
is a sequence/.style={has type=rdf:Seq, is a container},
is an alternative/.style={has type=rdf:Alt, is a container},
%
is a container/.code={\tikz@rdf@is@a@containertrue},
%
has as member/.code={\tikz@rdf@is@a@membertrue},%
}%
\def\tikz@rdf@current@scope@text{scope content}%
\let\tikz@rdf@subject\relax
\let\tikz@rdf@predicate\pgfutil@empty
\let\tikz@rdf@object\relax
\let\tikz@rdf@object@literal\relax
\let\tikz@rdf@container\relax
\newif\iftikz@rdf@object@scope@content
\newif\iftikz@rdf@is@a@container
\newif\iftikz@rdf@is@a@member
\def\tikz@rdf@parse#1{%
\edef\tikz@temp{#1}%
\expandafter\tikz@rdf@parse@#1\relax%
}%
\def\tikz@rdf@parse@{%
\pgfutil@ifnextchar({\tikz@rdf@parse@name}{%)
\pgfutil@ifnextchar"{\tikz@rdf@parse@literals}{%
\tikz@rdf@parse@curie%
}%
}%
}%
\def\tikz@rdf@parse@name(#1)\relax{%
\pgfidrefprevuse\tikz@rdf@the@id{#1}\expandafter\edef\tikz@rdf@target{\tikzrdfhashmark\tikz@rdf@the@id}%
}%
\def\tikz@rdf@parse@literals"#1"{%
\ifx\tikz@rdf@target\tikz@rdf@object@name%
\def\tikz@rdf@object@literal{#1}%
\else%
\tikzerror{Only RDF objects can be literals}%
\fi%
\pgfutil@ifnextchar\relax\pgfutil@gobble\tikz@rdf@parse@literals@rest%
}%
\def\tikz@rdf@parse@literals@rest and scope content\relax{%
\tikz@rdf@object@scope@contenttrue%
}%
\def\tikz@rdf@object@name{\tikz@rdf@object}%
\def\tikz@rdf@parse@curie#1\relax{%
\expandafter\def\tikz@rdf@target{#1}%
}%
{%
\catcode`\#=11
\gdef\tikzrdfhashmark{#}%
}%
\def\tikz@rdf@make@triple{%
% First, ensure that subject, predicate and object are set:
\ifx\tikz@rdf@subject\relax%
\tikzerror{RDF statement misses subject}%
\else%
\ifx\tikz@rdf@predicate\relax%
\tikzerror{RDF statement misses predicate}%
\else%
\iftikz@rdf@object@scope@content%
\edef\tikz@marshal{\noexpand\tikz@rdf@make@content@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object@literal}}%
\tikz@marshal%
\else%
\ifx\tikz@rdf@object\relax%
\ifx\tikz@rdf@object@literal\relax%
\tikzerror{RDF statement misses object}%
\else%
\edef\tikz@marshal{\noexpand\tikz@rdf@make@literal@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object@literal}}%
\tikz@marshal%
\fi%
\else%
\edef\tikz@marshal{\noexpand\tikz@rdf@make@normal@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object}}%
\tikz@marshal%
\fi%
\fi%
\fi%
\fi%
}%
\def\tikz@rdf@make@content@triple#1#2#3{%
\def\tikz@rdf@action{%
\def\tikz@rdf@invoke@code{%
\def\tikz@temp{#3}%
\ifx\tikz@temp\tikz@rdf@object@literal@text\else%
\pgfrdfcontent{#3}%
\fi%
\pgfrdfabout{#1}%
\pgfrdfdatatype{rdf:XMLLiteral}%
\foreach \tikz@rdf@pred in {#2}{%
\ifx\tikz@rdf@pred\pgfutil@empty\else%
\expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
\fi%
}%
}%
}%
}%
\def\tikz@rdf@make@literal@triple#1#2#3{%
\def\tikz@rdf@action{%
\tikz@add@rdf@post@option{%
{%
\pgfrdfabout{#1}%
\foreach \tikz@rdf@pred in {#2}{%
\ifx\tikz@rdf@pred\pgfutil@empty\else%
\expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
\fi%
}%
\pgfrdfcontent{#3}%
\pgfidscope%
\endpgfidscope%
}%
}%
}%
}%
\def\tikz@rdf@make@normal@triple#1#2#3{%
\def\tikz@rdf@action{%
\tikz@add@rdf@post@option{%
{%
\pgfrdfabout{#1}%
\foreach \tikz@rdf@pred in {#2}{%
\ifx\tikz@rdf@pred\pgfutil@empty\else%
\expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
\fi%
}%
\pgfrdfresource{#3}%
\pgfidscope%
\endpgfidscope%
}%
}%
}%
}%
\def\tikz@rdf@object@literal@text{\tikz@rdf@object@literal}%
% Containers
\def\tikz@rdf@init@container{%
\ifx\tikz@rdf@subject\relax%
\tikzerror{RDF statement misses subject}%
\else%
\expandafter\gdef\csname tikz@rdf@c@\tikz@rdf@subject\endcsname{0}%
\fi%
}%
\def\tikz@rdf@make@member{%
\ifx\tikz@rdf@subject\relax%
\tikzerror{RDF statement misses subject}%
\else%
% Get number:
\expandafter\let\expandafter\tikz@temp\csname tikz@rdf@c@\tikz@rdf@subject\endcsname%
\ifx\tikz@temp\relax%
\tikzerror{RDF subject is not a container}%
\else%
\c@pgf@counta\tikz@temp%
\advance\c@pgf@counta by1\relax%
\expandafter\xdef\csname tikz@rdf@c@\tikz@rdf@subject\endcsname{\the\c@pgf@counta}%
\edef\tikz@rdf@predicate{rdf:_\the\c@pgf@counta}%
\fi%
\fi%
}%
% Hooks:
\let\tikz@rdf@invoke@code\relax
\def\tikz@rdf@id@hook{%
\tikz@rdf@invoke@code%
\let\tikz@rdf@invoke@code\relax%
}%
% Add hook:
\expandafter\def\expandafter\tikz@id@hook\expandafter{\tikz@id@hook\tikz@rdf@id@hook}%
\endinput
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