stable 2010-05-24 13:10

1 files changed, 282 insertions, 0 deletions

diff --git a/metapost/context/base/mp-mlib.mp b/metapost/context/base/mp-mlib.mp
new file mode 100644
index 000000000..bf2372ca3
--- /dev/null
+++ b/metapost/context/base/mp-mlib.mp
@@ -0,0 +1,282 @@
+%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 ;