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Diffstat (limited to 'metapost/context/mp-core.mp')
| -rw-r--r-- | metapost/context/mp-core.mp | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/metapost/context/mp-core.mp b/metapost/context/mp-core.mp new file mode 100644 index 000000000..d4045d3da --- /dev/null +++ b/metapost/context/mp-core.mp @@ -0,0 +1,232 @@ +%D \module +%D [ file=mp-core.mp, +%D version=1999.08.12, +%D title=\CONTEXT\ \METAPOST\ graphics, +%D subtitle=core interfacing, +%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 context_tool : input mp-tool ; fi ; +if known context_core : endinput ; fi ; + +boolean context_core ; context_core := true ; + +pair lxy[], rxy[], cxy[], llxy[], lrxy[], ulxy[], urxy[] ; +path pxy[] ; +numeric hxy[], wxy[], dxy[], nxy[] ; + +def box_found (expr n,x,y,w,h,d) = + not ((x=0) and (y=0) and (w=0) and (h=0) and (d=0)) +enddef ; + +def initialize_box_pos (expr pos,n,x,y,w,h,d) = + pair lxy, rxy, cxy, llxy, lrxy, ulxy, urxy ; + path pxy ; numeric hxy, wxy, dxy, nxy; + lxy := (x,y) ; lxy[pos] := lxy ; + llxy := (x,y-d) ; llxy[pos] := llxy ; + lrxy := (x+w,y-d) ; lrxy[pos] := lrxy ; + urxy := (x+w,y+h) ; urxy[pos] := urxy ; + ulxy := (x,y+h) ; ulxy[pos] := ulxy ; + wxy := w ; wxy[pos] := wxy ; + hxy := h ; hxy[pos] := hxy ; + dxy := d ; dxy[pos] := dxy ; + rxy := lxy shifted (wxy,0) ; rxy[pos] := rxy ; + pxy := llxy--lrxy--urxy--ulxy--cycle ; pxy[pos] := pxy ; + cxy := center pxy ; cxy[pos] := cxy ; + nxy := n ; nxy[pos] := nxy ; +enddef ; + +def initialize_box (expr n,x,y,w,h,d) = + + numeric bpos ; bpos := 0 ; initialize_box_pos(bpos,n,x,y,w,h,d) ; + +enddef ; + +def initialize_area (expr fn,fx,fy,fw,fh,fd, + tn,tx,ty,tw,th,td) = + + numeric fpos ; fpos := 1 ; initialize_box_pos(fpos,fn,fx,fy,fw,fh,fd) ; + numeric tpos ; tpos := 2 ; initialize_box_pos(tpos,tn,tx,ty,tw,th,td) ; + + do_initialize_area (fpos, tpos) ; + +enddef ; + +def do_initialize_area (expr fpos, tpos) = + lxy := lxy[fpos] ; + llxy := (xpart llxy[fpos], ypart llxy[tpos]) ; + lrxy := lrxy[tpos] ; + urxy := (xpart urxy[tpos], ypart urxy[fpos]) ; + ulxy := ulxy[fpos] ; + wxy := xpart lrxy - xpart llxy ; + hxy := hxy[fpos] ; + dxy := dxy[tpos] ; + rxy := lxy shifted (wxy,0) ; + pxy := llxy--lrxy--urxy--ulxy--cycle ; + cxy := center pxy ; +enddef ; + +def initialize_par (expr fn,fx,fy,fw,fh,fd, ln,lx,ly,lw,lh,ld, + rn,rx,ry,rw,rh,rd, tn,tx,ty,tw,th,td) = + + numeric fpos ; fpos := 1 ; initialize_box_pos(fpos,fn,fx,fy,fw,fh,fd) ; + numeric lpos ; lpos := 3 ; initialize_box_pos(lpos,ln,lx,ly,lw,lh,ld) ; + numeric rpos ; rpos := 4 ; initialize_box_pos(rpos,rn,rx,ry,rw,rh,rd) ; + numeric tpos ; tpos := 2 ; initialize_box_pos(tpos,tn,tx,ty,tw,th,td) ; + + do_initialize_area (fpos, tpos) ; + do_initialize_par (fpos, lpos, rpos, tpos) ; + +enddef ; + +def do_initialize_par (expr fpos, lpos, rpos, tpos) = + + pair leftxy, righxy ; path txy, mxy, bxy ; % top mid bot + + leftxy := if xpart ulxy[fpos] > xpart ulxy[lpos] : ulxy[fpos] else : ulxy[lpos] fi ; + righxy := if xpart urxy[tpos] < xpart urxy[rpos] : urxy[tpos] else : urxy[rpos] fi ; + + pxy := origin ; + + if (round(ypart llxy[fpos]) = round(ypart ulxy[tpos])) and + (round(xpart lrxy[tpos]) < round(xpart llxy[fpos])) : + + txy := llxy[fpos] -- (xpart lrxy[rpos], ypart lrxy[fpos]) -- + (xpart urxy[rpos], ypart urxy[fpos]) -- ulxy[fpos] -- cycle ; + mxy := origin ; + bxy := (xpart llxy[lpos], ypart llxy[tpos]) -- lrxy[tpos] -- + urxy[tpos] -- (xpart ulxy[lpos], ypart ulxy[tpos]) -- cycle ; + + elseif ypart llxy[fpos] = ypart llxy[tpos] : + + txy := llxy[fpos] -- lrxy[tpos] -- urxy[tpos] -- ulxy[fpos] --cycle ; + mxy := origin ; + bxy := origin ; + + else : + + txy := (xpart lrxy[rpos], ypart lrxy[fpos]) -- + (xpart urxy[rpos], ypart urxy[fpos]) -- + ulxy[fpos] -- llxy[fpos] -- cycle ; + mxy := (xpart llxy[lpos], ypart ulxy[tpos]) -- + (xpart llxy[rpos], ypart ulxy[tpos]) -- + (xpart lrxy[rpos], ypart lrxy[fpos]) -- + (xpart llxy[lpos], ypart llxy[fpos]) -- cycle ; + bxy := (xpart llxy[lpos], ypart llxy[tpos]) -- + (xpart righxy, ypart lrxy[tpos]) -- + (xpart righxy, ypart urxy[tpos]) -- + (xpart llxy[lpos], ypart ulxy[tpos]) -- cycle ; + + if (round(point 0 of bxy) = round(point 1 of bxy)) or + (round(point 0 of bxy) = round(point 2 of bxy)) : + bxy := origin ; + fi ; + + if (round(point 0 of mxy) = round(point 1 of mxy)) or + (round(point 0 of mxy) = round(point 2 of mxy)) : + mxy := origin ; + fi ; + + if (round(point 0 of txy) = round(point 1 of txy)) or + (round(point 0 of txy) = round(point 2 of txy)) : + txy := origin ; + fi ; + + if (round (length(mxy)) > 1) : + if (round (length(txy)) < 2) : + if (round (length(bxy)) < 2) : + pxy := mxy ; + else : + pxy := point 0 of bxy -- point 1 of bxy -- point 2 of bxy -- + point 1 of mxy -- point 2 of mxy -- point 3 of mxy -- + cycle ; + fi ; + else : + if (round (length(bxy)) < 2) : + pxy := point 1 of mxy -- + point 1 of txy -- point 2 of txy -- point 3 of txy -- + point 3 of mxy -- point 0 of mxy -- + cycle ; + else : + pxy := point 1 of mxy -- + point 1 of txy -- point 2 of txy -- point 3 of txy -- + point 3 of mxy -- + point 0 of bxy -- point 1 of bxy -- point 2 of bxy -- + cycle ; + fi ; + fi ; + fi ; + + fi ; + +enddef ; + +color boxfillcolor ; boxfillcolor := .8white ; +color boxlinecolor ; boxlinecolor := .8blue ; + +def draw_box = + pickup pencircle scaled .5 ; + draw pxy withcolor boxlinecolor ; + draw lxy -- rxy withcolor boxlinecolor ; +% pickup pencircle scaled 1.5 ; +% draw llxy withcolor green ; +% draw lrxy withcolor green ; +% draw urxy withcolor green ; +% draw ulxy withcolor green ; +% draw cxy withcolor red ; +% pickup pencircle scaled 1 ; +% draw lxy withcolor red ; +% draw rxy withcolor red ; +enddef ; + +def draw_par = + pickup pencircle scaled .5 ; + if length pxy > 1 : + fill pxy withcolor boxfillcolor ; draw pxy withcolor boxlinecolor ; + else : + draw_par_top ; draw_par_mid ; draw_par_bot ; + fi ; +% pickup pencircle scaled 1.5 ; +% draw llxy[lpos] withcolor red ; +% draw llxy[rpos] withcolor red ; +% draw llxy[tpos] withcolor green ; +% draw llxy[fpos] withcolor green ; +enddef ; + +def draw_par_top = + pickup pencircle scaled .5 ; + if length txy > 1 : + fill txy withcolor boxfillcolor ; draw txy withcolor boxlinecolor ; + fi ; +enddef ; + +def draw_par_mid = + pickup pencircle scaled .5 ; + if length mxy > 1 : + fill mxy withcolor boxfillcolor ; draw mxy withcolor boxlinecolor ; + fi ; +enddef ; + +def draw_par_bot = + pickup pencircle scaled .5 ; + if length bxy > 1 : + fill bxy withcolor boxfillcolor ; draw bxy withcolor boxlinecolor ; + fi ; +enddef ; + +def anchor_box (expr n,x,y,w,h,d) = +% bboxmargin := 0 ; +% setbounds currentpicture to unitsquare shifted (x,y) ; + currentpicture := currentpicture shifted (-x,-y) ; +enddef ; + +let draw_area = draw_box ; +let anchor_area = anchor_box ; +let anchor_par = anchor_box ; + +endinput ; |