diff options
Diffstat (limited to 'math/html.ml')
| -rw-r--r-- | math/html.ml | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/math/html.ml b/math/html.ml new file mode 100644 index 00000000..6a24b114 --- /dev/null +++ b/math/html.ml @@ -0,0 +1,119 @@ +open Render_info +open Tex +open Util + +exception Too_difficult_for_html +type context = CTX_NORMAL | CTX_IT | CTX_RM +type conservativeness_t = CONSERVATIVE | MODERATE | LIBERAL + +let conservativeness = ref CONSERVATIVE +let html_liberal () = conservativeness := LIBERAL +let html_moderate () = if !conservativeness = CONSERVATIVE then conservativeness := MODERATE else () + + +let new_ctx = function + FONTFORCE_IT -> CTX_IT + | FONTFORCE_RM -> CTX_RM +let font_render lit = function + (_, FONT_UFH) -> lit + | (_, FONT_UF) -> lit + | (CTX_IT,FONT_RTI) -> raise Too_difficult_for_html + | (_, FONT_RTI) -> lit + | (CTX_IT,FONT_RM) -> "<i>"^lit^"</i>" + | (_, FONT_RM) -> lit + | (CTX_RM,FONT_IT) -> lit + | (_, FONT_IT) -> "<i>"^lit^"</i>" + +let rec html_render_flat ctx = function + TEX_LITERAL (HTMLABLE (ft,_,sh))::r -> (html_liberal (); (font_render sh (ctx,ft))^html_render_flat ctx r) + | TEX_LITERAL (HTMLABLEC(ft,_,sh))::r -> (font_render sh (ctx,ft))^html_render_flat ctx r + | TEX_LITERAL (MHTMLABLEC(ft,_,sh,_,_))::r -> (font_render sh (ctx,ft))^html_render_flat ctx r + | TEX_LITERAL (HTMLABLEM(ft,_,sh))::r -> (html_moderate(); (font_render sh (ctx,ft))^html_render_flat ctx r) + | TEX_LITERAL (HTMLABLE_BIG (_,sh))::r -> (html_liberal (); sh^html_render_flat ctx r) + | TEX_FUN1hl (_,(f1,f2),a)::r -> f1^(html_render_flat ctx [a])^f2^html_render_flat ctx r + | TEX_FUN1hf (_,ff,a)::r -> (html_render_flat (new_ctx ff) [a])^html_render_flat ctx r + | TEX_DECLh (_,ff,a)::r -> (html_render_flat (new_ctx ff) a)^html_render_flat ctx r + | TEX_CURLY ls::r -> html_render_flat ctx (ls @ r) + | TEX_DQ (a,b)::r -> (html_liberal (); + let bs = html_render_flat ctx [b] in match html_render_size ctx a with + true, s -> raise Too_difficult_for_html + | false, s -> s^"<sub>"^bs^"</sub>")^html_render_flat ctx r + | TEX_UQ (a,b)::r -> (html_liberal (); + let bs = html_render_flat ctx [b] in match html_render_size ctx a with + true, s -> raise Too_difficult_for_html + | false, s -> s^"<sup>"^bs^"</sup>")^html_render_flat ctx r + | TEX_FQ (a,b,c)::r -> (html_liberal (); + (let bs = html_render_flat ctx [b] in let cs = html_render_flat ctx [c] in + match html_render_size ctx a with + true, s -> raise Too_difficult_for_html + | false, s -> s^"<sub>"^bs^"</sub><sup>"^cs^"</sup>")^html_render_flat ctx r) + | TEX_BOX (_,s)::r -> s^html_render_flat ctx r + | TEX_LITERAL (TEX_ONLY _)::_ -> raise Too_difficult_for_html + | TEX_FUN1 _::_ -> raise Too_difficult_for_html + | TEX_FUN2 _::_ -> raise Too_difficult_for_html + | TEX_FUN2h _::_ -> raise Too_difficult_for_html + | TEX_FUN2sq _::_ -> raise Too_difficult_for_html + | TEX_INFIX _::_ -> raise Too_difficult_for_html + | TEX_INFIXh _::_ -> raise Too_difficult_for_html + | TEX_MATRIX _::_ -> raise Too_difficult_for_html + | TEX_LR _::_ -> raise Too_difficult_for_html + | TEX_BIG _::_ -> raise Too_difficult_for_html + | [] -> "" +and html_render_size ctx = function + TEX_LITERAL (HTMLABLE_BIG (_,sh)) -> true,sh + | x -> false,html_render_flat ctx [x] + +let rec html_render_deep ctx = function + TEX_LITERAL (HTMLABLE (ft,_,sh))::r -> (html_liberal (); ("",(font_render sh (ctx,ft)),"")::html_render_deep ctx r) + | TEX_LITERAL (HTMLABLEM(ft,_,sh))::r -> (html_moderate(); ("",(font_render sh (ctx,ft)),"")::html_render_deep ctx r) + | TEX_LITERAL (HTMLABLEC(ft,_,sh))::r -> ("",(font_render sh (ctx,ft)),"")::html_render_deep ctx r + | TEX_LITERAL (MHTMLABLEC(ft,_,sh,_,_))::r -> ("",(font_render sh (ctx,ft)),"")::html_render_deep ctx r + | TEX_LITERAL (HTMLABLE_BIG (_,sh))::r -> (html_liberal (); ("",sh,"")::html_render_deep ctx r) + | TEX_FUN2h (_,f,a,b)::r -> (html_liberal (); (f a b)::html_render_deep ctx r) + | TEX_INFIXh (_,f,a,b)::r -> (html_liberal (); (f a b)::html_render_deep ctx r) + | TEX_CURLY ls::r -> html_render_deep ctx (ls @ r) + | TEX_DQ (a,b)::r -> (let bs = html_render_flat ctx [b] in match html_render_size ctx a with + true, s -> "","<font size='+2'>"^s^"</font>",bs + | false, s -> "",(s^"<sub>"^bs^"</sub>"),"")::html_render_deep ctx r + | TEX_UQ (a,b)::r -> (let bs = html_render_flat ctx [b] in match html_render_size ctx a with + true, s -> bs,"<font size='+2'>"^s^"</font>","" + | false, s -> "",(s^"<sup>"^bs^"</sup>"),"")::html_render_deep ctx r + | TEX_FQ (a,b,c)::r -> (html_liberal (); + (let bs = html_render_flat ctx [b] in let cs = html_render_flat ctx [c] in + match html_render_size ctx a with + true, s -> (cs,"<font size='+2'>"^s^"</font>",bs) + | false, s -> ("",(s^"<sub>"^bs^"</sub><sup>"^cs^"</sup>"),""))::html_render_deep ctx r) + | TEX_FUN1hl (_,(f1,f2),a)::r -> ("",f1,"")::(html_render_deep ctx [a]) @ ("",f2,"")::html_render_deep ctx r + | TEX_FUN1hf (_,ff,a)::r -> (html_render_deep (new_ctx ff) [a]) @ html_render_deep ctx r + | TEX_DECLh (_,ff,a)::r -> (html_render_deep (new_ctx ff) a) @ html_render_deep ctx r + | TEX_BOX (_,s)::r -> ("",s,"")::html_render_deep ctx r + | TEX_LITERAL (TEX_ONLY _)::_ -> raise Too_difficult_for_html + | TEX_FUN1 _::_ -> raise Too_difficult_for_html + | TEX_FUN2 _::_ -> raise Too_difficult_for_html + | TEX_FUN2sq _::_ -> raise Too_difficult_for_html + | TEX_INFIX _::_ -> raise Too_difficult_for_html + | TEX_MATRIX _::_ -> raise Too_difficult_for_html + | TEX_LR _::_ -> raise Too_difficult_for_html + | TEX_BIG _::_ -> raise Too_difficult_for_html + | [] -> [] + +let rec html_render_table = function + sf,u,d,("",a,"")::("",b,"")::r -> html_render_table (sf,u,d,(("",a^b,"")::r)) + | sf,u,d,(("",a,"") as c)::r -> html_render_table (c::sf,u,d,r) + | sf,u,d,((_,a,"") as c)::r -> html_render_table (c::sf,true,d,r) + | sf,u,d,(("",a,_) as c)::r -> html_render_table (c::sf,u,true,r) + | sf,u,d,((_,a,_) as c)::r -> html_render_table (c::sf,true,true,r) + | sf,false,false,[] -> mapjoin (function (u,m,d) -> m) (List.rev sf) + | sf,true,false,[] -> let ustr,mstr = List.fold_left (fun (us,ms) (u,m,d) -> (us^"<td>"^u^"</td>",ms^"<td>"^u^"</td>")) + ("","") (List.rev sf) in + "<table><tr align='center' valign='bottom'>" ^ ustr ^ "</tr><tr align='center'>" ^ mstr ^ "</tr></table>" + | sf,false,true,[] -> let mstr,dstr = List.fold_left (fun (ms,ds) (u,m,d) -> (ms^"<td>"^m^"</td>",ds^"<td>"^d^"</td>")) + ("","") (List.rev sf) in + "<table><tr align='center'>" ^ mstr ^ "</tr><tr align='center' valign='top'>" ^ dstr ^ "</tr></table>" + | sf,true,true,[] -> let ustr,mstr,dstr = List.fold_left (fun (us,ms,ds) (u,m,d) -> + (us^"<td>"^u^"</td>",ms^"<td>"^m^"</td>",ds^"<td>"^d^"</td>")) ("","","") (List.rev sf) in + "<table><tr align='center' valign='bottom'>" ^ ustr ^ "</tr><tr align='center'>" ^ mstr ^ "</tr><tr align='center' valign='top'>" ^ dstr ^ "</tr></table>" + +let html_render tree = html_render_table ([],false,false,html_render_deep CTX_NORMAL tree) + +let render tree = try Some (html_render tree) with _ -> None |