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%D \module
%D [ file=mp-mlib.mp,
%D version=2008.03.21,
%D title=\CONTEXT\ \METAPOST\ graphics,
%D subtitle=specials,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
%C details.
if unknown mplib : endinput ; fi ;
if known context_mlib : endinput ; fi ;
boolean context_mlib ; context_mlib := true ;
numeric _tt_w_[], _tt_h_[], _tt_d_[] ;
numeric _tt_n_ ; _tt_n_ := 0 ;
picture _tt_p_ ; _tt_p_ := nullpicture ;
boolean _trial_run_ ; _trial_run_ := false ;
def resettextexts =
_tt_n_ := 0 ;
_tt_p_ := nullpicture ;
enddef ;
extra_endfig := ";addto currentpicture also _tt_p_; " & extra_endfig; % was draw _tt_p_
extra_beginfig := extra_beginfig & "resettextexts;";
vardef rawtextext(expr str) =
if str = "" :
nullpicture
elseif _trial_run_ :
image (
_tt_n_ := _tt_n_ + 1 ;
_tt_p_ := image (
addto currentpicture also _tt_p_ ;
addto currentpicture doublepath unitsquare withprescript "tf" withpostscript decimal _tt_n_ & ":" & str ;
) ;
addto currentpicture doublepath unitsquare withpen pencircle scaled 0 ;
)
else :
image (
_tt_n_ := _tt_n_ + 1 ;
addto currentpicture doublepath unitsquare
xscaled _tt_w_[_tt_n_]
yscaled (_tt_h_[_tt_n_] + _tt_d_[_tt_n_])
withprescript "ts"
withpostscript decimal _tt_n_ & ":" & str ;
) shifted (0,-_tt_d_[_tt_n_])
fi
enddef ;
% not ok yet
pair laboff.d, laboff.dlft, laboff.drt ; % new positional suffixes
pair laboff.origin, laboff.raw ; % graph mess
laboff.d := laboff ; labxf.d := labxf ; labyf.d := labyf ;
laboff.dlft := laboff.lft ; labxf.dlft := labxf.lft ; labyf.dlft := labyf.lft ;
laboff.drt := laboff.rt ; labxf.drt := labxf.rt ; labyf.drt := labyf.rt ;
labtype := 0 ; labtype.lft := 1 ; labtype.rt := 2 ;
labtype.bot := 3 ; labtype.top := 4 ; labtype.ulft := 5 ;
labtype.urt := 6 ; labtype.llft := 7 ; labtype.lrt := 8 ;
labtype.d := 10 ; labtype.dlft := 11 ; labtype.drt := 12 ;
labtype.origin := 0 ; labtype.raw := 0 ;
% laboff.origin = (infinity,infinity) ; labxf.origin := 0 ; labyf.origin := 0 ;
% laboff.raw = (infinity,infinity) ; labxf.raw := 0 ; labyf.raw := 0 ;
% todo: thelabel.origin("xxxx",origin) (overflows)
laboff.origin = (0,0) ; labxf.origin := 0 ; labyf.origin := 0 ;
laboff.raw = (0,0) ; labxf.raw := 0 ; labyf.raw := 0 ;
pair laboff.l ; laboff.l = laboff.lft ;
pair laboff.r ; laboff.r = laboff.rt ;
pair laboff.b ; laboff.b = laboff.bot ;
pair laboff.t ; laboff.t = laboff.top ;
pair laboff.l_t ; laboff.l_t = laboff.ulft ;
pair laboff.r_t ; laboff.r_t = laboff.urt ;
pair laboff.l_b ; laboff.l_b = laboff.llft ;
pair laboff.r_b ; laboff.r_b = laboff.lrt ;
pair laboff.t_l ; laboff.t_l = laboff.ulft ;
pair laboff.t_r ; laboff.t_r = laboff.urt ;
pair laboff.b_l ; laboff.b_l = laboff.llft ;
pair laboff.b_r ; laboff.b_r = laboff.lrt ;
labxf.l ; labxf.l = labxf.lft ;
labxf.r ; labxf.r = labxf.rt ;
labxf.b ; labxf.b = labxf.bot ;
labxf.t ; labxf.t = labxf.top ;
labxf.l_t ; labxf.l_t = labxf.ulft ;
labxf.r_t ; labxf.r_t = labxf.urt ;
labxf.l_b ; labxf.l_b = labxf.llft ;
labxf.r_b ; labxf.r_b = labxf.lrt ;
labxf.t_l ; labxf.t_l = labxf.ulft ;
labxf.t_r ; labxf.t_r = labxf.urt ;
labxf.b_l ; labxf.b_l = labxf.llft ;
labxf.b_r ; labxf.b_r = labxf.lrt ;
labyf.l ; labyf.l = labyf.lft ;
labyf.r ; labyf.r = labyf.rt ;
labyf.b ; labyf.b = labyf.bot ;
labyf.t ; labyf.t = labyf.top ;
labyf.l_t ; labyf.l_t = labyf.ulft ;
labyf.r_t ; labyf.r_t = labyf.urt ;
labyf.l_b ; labyf.l_b = labyf.llft ;
labyf.r_b ; labyf.r_b = labyf.lrt ;
labyf.t_l ; labyf.t_l = labyf.ulft ;
labyf.t_r ; labyf.t_r = labyf.urt ;
labyf.b_l ; labyf.b_l = labyf.llft ;
labyf.b_r ; labyf.b_r = labyf.lrt ;
labtype.l ; labtype.l = labtype.lft ;
labtype.r ; labtype.r = labtype.rt ;
labtype.b ; labtype.b = labtype.bot ;
labtype.t ; labtype.t = labtype.top ;
labtype.l_t ; labtype.l_t = labtype.ulft ;
labtype.r_t ; labtype.r_t = labtype.urt ;
labtype.l_b ; labtype.l_b = labtype.llft ;
labtype.r_b ; labtype.r_b = labtype.lrt ;
labtype.t_l ; labtype.t_l = labtype.ulft ;
labtype.t_r ; labtype.t_r = labtype.urt ;
labtype.b_l ; labtype.b_l = labtype.llft ;
labtype.b_r ; labtype.b_r = labtype.lrt ;
vardef thetextext@#(expr p,z) = % adapted copy of thelabel@
if string p :
thetextext@#(rawtextext(p),z)
else :
p
if (labtype@# >= 10) : shifted (0,ypart center p) fi
shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p + labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p))
fi
enddef ;
vardef textext@#(expr txt) =
interim labeloffset := textextoffset ;
if string txt :
thetextext@#(rawtextext(txt),origin)
else :
thetextext@#(txt,origin)
fi
enddef ;
% \starttext
% \startMPpage
% numeric value ; value = 123 ;
% label.lft(decimal value,origin) ;
% draw "oeps" infont defaultfont ;
% \stopMPpage
% \stoptext
vardef thelabel@#(expr s, z) =
save p ; picture p ;
if picture s :
p = s ;
else :
p = textext("\definedfont[" & defaultfont & "]" & s) scaled defaultscale ;
fi ;
p shifted (z + labeloffset*laboff@# - (labxf@#*lrcorner p + labyf@#*ulcorner p + (1-labxf@#-labyf@#)*llcorner p))
enddef;
let normalinfont = infont ;
primarydef str infont name = % very naughty !
if name = "" :
textext(str)
else :
textext("\definedfont[" & name & "]" & str)
fi
enddef ;
def circular_shade (expr p, n, ca, cb) =
begingroup ;
save ab, r ; pair ab ; numeric r ;
r := (xpart lrcorner p - xpart llcorner p) ++ (ypart urcorner p - ypart lrcorner p) ;
set_circular_vector(ab,r)(p,n) ;
fill p withcircularshade(ab,ab,0,r,ca,cb) ;
if trace_shades :
drawarrow ab -- ab shifted (0,r) withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def linear_shade (expr p, n, ca, cb) =
begingroup ;
save a, b, sh ; pair a, b ;
set_linear_vector(a,b)(p,n) ;
fill p withlinearshade(a,b,ca,cb) ;
if trace_shades :
drawarrow a -- b withpen pencircle scaled 1pt withcolor .5white ;
fi ;
endgroup ;
enddef ;
def withcircularshade (expr a, b, ra, rb, ca, cb) =
withprescript
"cs"
withpostscript
"0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " & decimal ra & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) & " " & decimal rb
enddef ;
def withlinearshade (expr a, b, ca, cb) =
withprescript
"ls"
withpostscript
"0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset)
enddef ;
string _defined_cs_pre_[], _defined_cs_post_[] ; numeric _defined_cs_ ; _defined_cs_:= 0 ;
vardef define_circular_shade (expr a, b, ra, rb, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "cs" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " & decimal ra & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) & " " & decimal rb ;
_defined_cs_
enddef ;
vardef define_linear_shade (expr a, b, ca, cb) =
_defined_cs_ := _defined_cs_ + 1 ;
_defined_cs_pre_ [_defined_cs_] := "ls" ;
_defined_cs_post_[_defined_cs_] := "0 1 " & decimal shadefactor & " " &
colordecimals ca & " " & ddecimal (a shifted shadeoffset) & " " &
colordecimals cb & " " & ddecimal (b shifted shadeoffset) ;
_defined_cs_
enddef ;
primarydef p withshade sc =
p withprescript _defined_cs_pre_[sc] withpostscript _defined_cs_post_[sc]
enddef ;
def shadecolor(expr sc) = % obsolete
1 withprescript _defined_cs_pre_[sc] withpostscript _defined_cs_post_[sc]
enddef ;
def graphictext primary t =
if _trial_run_ :
let dographictextindeed = nographictext ;
else :
let dographictextindeed = dographictext ;
fi
dographictextindeed(t)
enddef ;
def dographictext (expr t) =
begingroup ;
save figurepicture ; picture figurepicture ;
figurepicture := currentpicture ; currentpicture := nullpicture ;
currentgraphictext := currentgraphictext + 1 ;
dofinishgraphictext
enddef ;
def nographictext (expr t) text rest =
draw unitsquare withprescript "gt" withpostscript t ;
enddef ;
def savegraphictext (expr str) =
enddef ;
def erasegraphictextfile =
enddef ;
def externalfigure primary filename =
doexternalfigure (filename)
enddef ;
def doexternalfigure (expr filename) text transformation =
draw unitsquare transformation withprescript "fg" withpostscript filename ;
enddef ;
def register (expr label, width, height, offset) =
draw unitsquare xscaled width yscaled height shifted offset withprescript "ps" withpostscript label ;
enddef ;
extra_beginfig := extra_beginfig & "currentgraphictext := 0 ; " ;
extra_endfig := extra_endfig & "finishsavingdata ; " ;
extra_endfig := extra_endfig & "resettextexts ; " ;
boolean cmykcolors ; cmykcolors := true ;
boolean spotcolors ; spotcolors := true ;
vardef verbatim(expr str) =
ditto & "\detokenize{" & str & "}" & ditto
enddef ;
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