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Diffstat (limited to 'tex/context/base/mkiv/meta-nod.mkiv')
| -rw-r--r-- | tex/context/base/mkiv/meta-nod.mkiv | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/tex/context/base/mkiv/meta-nod.mkiv b/tex/context/base/mkiv/meta-nod.mkiv new file mode 100644 index 000000000..5c7b3d503 --- /dev/null +++ b/tex/context/base/mkiv/meta-nod.mkiv @@ -0,0 +1,241 @@ +%D \module +%D [ file=meta-nod, +%D version=2016.11.23, +%D title=\METAPOST\ Graphics, +%D subtitle=Nodes, +%D author={Alan Braslau and Hans Hagen}, +%D date=\currentdate, +%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}] +%C +%C This module is part of the \CONTEXT\ macro||package and is +%C therefore copyrighted by \PRAGMA. See mreadme.pdf for +%C details. + +\unprotect + +\defineMPinstance + [nodes] + [\s!format=metafun, + \s!extensions=\v!yes, + \s!initializations=\v!yes, + \c!method=\s!double] + +\defineframed + [node] + [\c!frame=\v!off] + +\defineframed + [smallnode] + [node] + [\c!foregroundstyle=\small] + +% \startMPdefinitions{nodes} +% loadmodule "node" ; +% \stopMPdefinitions + +\protect + +%D This module provides a simple \TEX\ layer on top of the nodes library that +%D is preloaded in \METAFUN. More information can be found in the manual and +%D article. +%D +%D We strongly advice to use the \METAPOST\ interface and only provide this +%D \TEX\ variant as proof of concept. There are no plans to extend this module +%D because we see no advantage in using a \TEX\ interface over a \METAPOST\ +%D one. +%D +%D \startbuffer +%D \startnodes +%D \placenode[0,0]{A} +%D \placenode[1,0]{B} +%D \connectnodes [0,1] [option=doublearrow] +%D \stopnodes +%D +%D \startnodes[dx=2cm,rotation=45] +%D \placenode[0,0]{A} +%D \placenode[1,0]{B} +%D \placenode[1,1]{C} +%D \placenode[0,1]{D} +%D \connectnodes [0,2] [option=doublearrow,label=a,offset=.05] +%D \connectnodes [1,3] [option=doublearrows] +%D \stopnodes +%D +%D \startnodes[dx=2cm,dy=2cm] +%D \nodeMPcode{ahlength := 12pt ; ahangle := 30 ; ahvariant := 1 ;} +%D \mpcode{ahlength := 12pt ; ahangle := 30 ; ahvariant := 1 ;} +%D \placenode[0,1]{\node{A}} +%D \placenode[1,1]{\node{B}} +%D \placenode[0,0]{\node{C}} +%D \placenode[1,0]{\node{D}} +%D \connectnodes [0,3] [option=arrow,label={ }] +%D \connectnodes [1,2] [option=arrow] +%D \stopnodes +%D \stopbuffer +%D +%D \typebuffer +%D +%D \startlinecorrection \getbuffer \stoplinecorrection + +\unprotect + +\installcorenamespace{metanodes} +\installcorenamespace{metanodesoption} +\installcorenamespace{metanodesalternative} +\installcorenamespace{metanodesposition} + +% todo: maybe instances + +\installparameterhandler \??metanodes {metanodes} +\installsetuphandler \??metanodes {metanodes} + +\setupmetanodes + [\c!option =, + \c!alternative =, + \c!offset =0, + \c!position =, + \c!label =, + \c!dx =2\emwidth, + \c!dy =2\emwidth, + \c!rotation =90, + \c!rulethickness =.5pt, + \c!command =] + +\newtoks\t_every_meta_nodes +\newtoks\t_meta_nodes + +\let\stopnodes\relax + +\unexpanded\def\startnodes + {\dosingleempty\meta_nodes_start} + +\def\meta_nodes_start[#1]#2\stopnodes + {\hpack\bgroup + \iffirstargument + \setupcurrentmetanodes[#1]% + \fi + \edef\p_meta_option{\metanodesparameter\c!option}% + \edef\p_meta_alternative{\metanodesparameter\c!alternative}% + \the\t_every_meta_nodes + \t_meta_nodes\emptytoks + #2\removeunwantedspaces + % for alan, will be commented: + \writestatus{metanodes}{\detokenize\expandafter{\the\t_meta_nodes}}% + \startMPcode + mfun_node_init(% + \the\dimexpr\metanodesparameter\c!dx\relax,% + \the\dimexpr\metanodesparameter\c!dy\relax,% + \metanodesparameter\c!rotation% + ) ; + \the\t_meta_nodes ; + mfun_node_flush ; + \stopMPcode + \egroup} + +% \unexpanded\def\grph_nodes_node[#1,#2]#3% +% {\etoksapp\t_meta_nodes{mfun_node_make(\number#1,\number#2,"\metanodesparameter\c!command{#3}");}} + +\unexpanded\def\grph_nodes_node + {\dodoubleempty\grph_nodes_node_two} + +\def\grph_nodes_node_two[#1][#2]% + {\grph_nodes_node_two_indeed[#1][#2]} + +\def\grph_nodes_node_two_indeed[#1,#2][#3]#4% + {\begingroup + \ifsecondargument + \setupcurrentmetanodes[#3]% + \fi + \edef\p_label{#4}% + \normalexpanded{\endgroup\noexpand\etoksapp\t_meta_nodes{% + mfun_node_make(\number#1,\number#2% + \ifx\p_label\empty \else + ,"\metanodesparameter\c!command{\p_label}"% + \fi + );% + }}} + +\appendtoks + \let\placenode\grph_nodes_node +\to \t_every_meta_nodes + +\unexpanded\def\grph_nodes_fromto + {\dodoubleempty\grph_nodes_fromto_two} + +\def\grph_nodes_fromto_two[#1][#2]% + {\grph_nodes_fromto_two_indeed[#1][#2]}% get rid of {n,m} + +\letvalue{\??metanodesposition }\empty +\setvalue{\??metanodesposition top}{.top} +\setvalue{\??metanodesposition bottom}{.bot} +\setvalue{\??metanodesposition left}{.lft} +\setvalue{\??metanodesposition right}{.rt} +\setvalue{\??metanodesposition upperleft}{.ulft} +\setvalue{\??metanodesposition topleft}{.ulft} +\setvalue{\??metanodesposition lefttop}{.ulft} +\setvalue{\??metanodesposition upperright}{.urt} +\setvalue{\??metanodesposition topright}{.urt} +\setvalue{\??metanodesposition righttop}{.urt} +\setvalue{\??metanodesposition lowerleft}{.llft} +\setvalue{\??metanodesposition bottomleft}{.llft} +\setvalue{\??metanodesposition leftbottom}{.llft} +\setvalue{\??metanodesposition lowerright}{.lrt} +\setvalue{\??metanodesposition bottomright}{.lrt} +\setvalue{\??metanodesposition rightbottom}{.lrt} + +\def\grph_nodes_fromto_two_indeed[#1,#2][#3]% we can't group because etoksapp doesn't like that + {\begingroup + \ifsecondargument + \setupcurrentmetanodes[#3]% + \fi + \edef\p_label {\metanodesparameter\c!label}% + \edef\p_rulethickness{\metanodesparameter\c!rulethickness}% + \edef\p_command {\metanodesparameter\c!command}% better get an error early + \normalexpanded{\endgroup\noexpand\etoksapp\t_meta_nodes{% + \ifcsname\??metanodesalternative\metanodesparameter\c!alternative\endcsname + \lastnamedcs + \else + \csname\??metanodesalternative\endcsname + \fi + \space + mfun_nodes_fromto\begincsname\??metanodesposition\metanodesparameter\c!position\endcsname(% + \metanodesparameter\c!offset,% + \number#1,\number#2% + \ifx\p_label\empty \else + ,"\ifx\p_command\empty\p_label\else\p_command{\p_label}\fi"% + \fi + )% + \space + \ifcsname\??metanodesoption\metanodesparameter\c!option\endcsname + \lastnamedcs + \else + \csname\??metanodesoption\endcsname + \fi + \space + \ifx\p_rulethickness\empty \else + withpen pencircle scaled \the\dimexpr\p_rulethickness\relax + \fi + ;% + }}} + +\setvalue{\??metanodesalternative }{draw} +\setvalue{\??metanodesalternative arrow}{drawarrow} +\setvalue{\??metanodesalternative doublearrow}{drawdblarrow} +\setvalue{\??metanodesalternative doublearrows}{drawdoublearrows} + +\setvalue{\??metanodesoption }{} +\setvalue{\??metanodesoption dashed}{dashed evenly} +\setvalue{\??metanodesoption dotted}{dashed withdots scaled .5} + +\appendtoks + \let\connectnodes\grph_nodes_fromto +\to \t_every_meta_nodes + +\unexpanded\def\grph_nodes_code#1% + {\etoksapp\t_meta_nodes{#1}} + +\appendtoks + \let\nodeMPcode\grph_nodes_code + \let\mpcode\grph_nodes_code +\to \t_every_meta_nodes + +\protect \endinput |