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|
open Boxes
open Picture
let rec tex_string = function
[] -> ""
| h::t -> let chr = match h
with '#' -> "\char'43{}"
| '$' -> "\char'44{}"
| '%' -> "\char'45{}"
| '&' -> "\char'46{}"
| '*' -> "\char'52{}"
| '^' -> "\char'136{}"
| '_' -> "\char'137{}"
| '{' -> "\char'173{}"
| '}' -> "\char'175{}"
| '~' -> "\char'176{}"
| '\\' -> "\char'134{}"
| _ -> String.make 1 h
in (tex_string t) ^ chr
let last s = List.hd (List.rev s)
let strbalance = "\\rule[-\\bdepth]{0pt}{\\bheight}"
and strfont = "\\ttfamily{}"
and epsilon = 1.0e-10
let generate box_con box_off char_off box_height box_sep_frac t =
let rec out_list xend yoff = function
[] -> []
| h :: s ->
let difference = xend -. dim_l h -. box_con
and box_sep = box_height *. box_sep_frac
and ypos = if yoff -. dim_h h < epsilon then 0.
else yoff -. dim_h h in
if abs_float difference < epsilon then
SubPicture ((box_con, ypos), generate_aux false h, []) ::
out_list xend (ypos -. box_sep) s
else
SubPicture ((box_con, ypos), generate_aux false h, []) ::
Line ((box_con +. dim_l h, ypos +. dim_rc h), 1, 0,
difference, []) ::
out_list xend (ypos -. box_sep) s
and generate_aux islast = function
TermBox (d, s) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, [Arrowhead]);
Oval ((d.l /. 2., d.h /. 2.), d.l -. 2. *. box_con, box_height, []);
Text ((d.l /. 2., d.h /. 2.), strfont ^ tex_string s ^ strbalance,
[]);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| ParamBox (d, s) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, [Arrowhead]);
Framebox ((box_con, 0.), d.l -. 2. *. box_con, box_height,
[Dashed 2.]);
Text ((d.l /. 2., d.h /. 2.), strfont ^ tex_string s ^ strbalance,
[]);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| NonTermBox (d, s) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, [Arrowhead]);
Framebox ((box_con, 0.), d.l -. 2. *. box_con, box_height, []);
Text ((d.l /. 2., d.h /. 2.), strfont ^ tex_string s ^ strbalance,
[]);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| OptBox (d, t) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, []);
SubPicture ((box_con, box_height /. 2.), generate_aux false t, []);
Line ((box_con, d.h -. d.lc), 0, -1, d.h -. d.lc, []);
Line ((box_con, 0.), 1, 0, d.l -. 2. *. box_con, []);
Line ((d.l -. box_con, 0.), 0, 1, d.rc, [Arrowhead]);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| RepBox (d, t) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, []);
SubPicture ((box_con, 0.), generate_aux false t, []);
Line ((box_con, d.h), 0, -1, d.lc, [Arrowhead]);
Line ((d.l -. box_con, d.h), -1, 0, d.l -. 2. *. box_con, []);
Line ((d.l -. box_con, d.h), 0, -1, d.h -. d.rc, []);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| TermRepBox (d, t1, TermBox (d1, s)) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, []);
SubPicture ((box_con, 0.), generate_aux false t1, []);
Oval ((d.l /. 2., d.h -. box_height /. 2.), d1.l, box_height, []);
Text ((d.l /. 2., d.h -. box_height /. 2.),
strfont ^ tex_string s ^ strbalance, []);
Line ((box_con, d.h -. box_height /. 2.), 0, -1,
d.lc -. box_height /. 2., [Arrowhead]);
Line ((d.l -. box_con, d.h -. box_height /. 2.), -1, 0,
d.l /. 2. -. box_con -. d1.l /. 2., []);
Line ((box_con, d.h -. box_height /. 2.), 1, 0,
d.l /. 2. -. box_con -. d1.l /. 2., []);
Line ((d.l -. box_con, d.h -. box_height /. 2.), 0, -1,
d.h -. d.rc -. box_height /. 2., []);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| OptRepBox (d, t) ->
Picture (d.l, d.h, 0., 0., [
Line ((0., d.h -. d.lc), 1, 0, box_con, []);
SubPicture ((box_con, box_height /. 2.), generate_aux false t, []);
Line ((box_con, d.h), 0, -1, d.lc, [Arrowhead]);
Line ((d.l -. box_con, d.h), -1, 0, d.l -. 2. *. box_con, []);
Line ((d.l -. box_con, d.h), 0, -1, d.h -. d.rc, []);
Line ((box_con, d.h -. d.lc), 0, -1, d.h -. d.lc, []);
Line ((box_con, 0.), 1, 0, d.l -. 2. *. box_con, []);
Line ((d.l -. box_con, 0.), 0, 1, d.rc, [Arrowhead]);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| OrBoxList (d, l) ->
Picture (d.l, d.h, 0., 0.,
Line ((0., d.h -. d.lc), 1, 0, box_con, []) ::
(out_list (d.l -. box_con) d.h l) @ [
Line ((d.l -. box_con, d.h -. dim_h (List.hd l) +.
dim_rc (List.hd l)), 0, -1,
d.h -. dim_h (List.hd l) +. dim_rc (List.hd l) -. d.rc,
[Arrowhead]);
Line ((box_con, d.h -. d.lc), 0, -1,
d.h -. d.lc -. (let lst = last l
in dim_h lst -. dim_lc lst), []);
Line ((d.l -. box_con, d.rc), 1, 0, box_con,
if islast then [Arrowhead] else [])
])
| ConBox (d, t1, t2) ->
let a = dim_h t2 -. dim_lc t2 -. dim_rc t1 in
Picture (d.l, d.h, 0., 0., [
SubPicture ((0., if a > 0. then a else 0.), generate_aux false t1,
[]);
SubPicture ((dim_l t1 -. box_con, if a < 0. then ~-.a else 0.),
generate_aux islast t2, [])
])
| _ -> raise (Failure "Bug im Parser!")
in generate_aux true t
|
