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(***********************************************************************)
(* *)
(* HEVEA *)
(* *)
(* Luc Maranget, projet PARA, INRIA Rocquencourt *)
(* *)
(* Copyright 1998 Institut National de Recherche en Informatique et *)
(* Automatique. Distributed only by permission. *)
(* *)
(***********************************************************************)
let header = "$Id: html.ml,v 1.114 2007/03/09 13:23:52 maranget Exp $"
(* Output function for a strange html model :
- Text elements can occur anywhere and are given as in latex
- A new grouping construct is given (open_group () ; close_group ())
*)
open Misc
open Parse_opts
open Latexmacros
open HtmlCommon
exception Error of string
type block = HtmlCommon.block
let addvsize x = flags.vsize <- flags.vsize + x
(* Calls to other modules that are in the interface *)
let
over,
erase_display,
begin_item_display,
end_item_display,
force_item_display,
item_display,
do_close_display,
do_open_display_varg,
do_open_display,
do_close_maths,
do_open_maths,
put_in_math,
math_put,
math_put_char,
left,
right
=
if !Parse_opts.mathml then begin
MathML.over,
MathML.erase_display,
MathML.begin_item_display,
MathML.end_item_display,
MathML.force_item_display,
MathML.item_display,
MathML.close_display,
MathML.open_display_varg,
MathML.open_display,
MathML.close_maths,
MathML.open_maths,
MathML.put_in_math,
MathML.put,
MathML.put_char,
MathML.left,
MathML.right
end else begin
HtmlMath.over,
HtmlMath.erase_display,
HtmlMath.begin_item_display,
HtmlMath.end_item_display,
HtmlMath.force_item_display,
HtmlMath.item_display,
(fun () -> HtmlMath.close_display false),
(HtmlMath.open_display_varg false),
(fun () -> HtmlMath.open_display false),
HtmlMath.close_maths,
HtmlMath.open_maths,
HtmlMath.put_in_math,
HtmlMath.put,
HtmlMath.put_char,
HtmlMath.left,
HtmlMath.right
end
;;
let
int_sup_sub,
limit_sup_sub,
standard_sup_sub
=
if !Parse_opts.mathml then
MathML.int_sup_sub,
MathML.limit_sup_sub,
MathML.standard_sup_sub
else
HtmlMath.int_sup_sub,
HtmlMath.limit_sup_sub,
HtmlMath.standard_sup_sub
;;
let set_out out = !cur_out.out <- out
and stop () =
MyStack.push stacks.s_active !cur_out.out ;
!cur_out.out <- Out.create_null ()
and restart () =
!cur_out.out <- MyStack.pop stacks.s_active
;;
(* acces to flags *)
let is_empty () = flags.empty
;;
let debug m =
Printf.fprintf stderr
"%s : table_vsize=%d vsize=%d" m flags.table_vsize flags.vsize ;
prerr_newline ()
;;
let debug_empty f =
prerr_string (if f.empty then "empty=true" else "empty=false")
;;
let put s =
if flags.in_math then math_put s
else HtmlCommon.put s
;;
let put_char c =
if flags.in_math then math_put_char c
else HtmlCommon.put_char c
;;
let put_unicode i = OutUnicode.html_put put put_char i
let loc_name _ = ()
(* freeze everyting and change output file *)
let open_chan chan =
open_group "" ;
free !cur_out ;
!cur_out.out <- Out.create_chan chan ;
;;
let close_chan () =
Out.close !cur_out.out ;
!cur_out.out <- Out.create_buff () ;
close_group ()
;;
let to_style f =
let old_flags = copy_flags flags in
open_block INTERN "" ;
(* clearstyle () ; *)
f () ;
let r = to_pending !cur_out.pending !cur_out.active in
erase_block INTERN ;
set_flags flags old_flags ;
r
;;
let get_current_output () = Out.to_string !cur_out.out
let finalize check =
if check then begin
check_stacks ()
end else begin
(* Flush output in case of fatal error *)
let rec close_rec () =
if not (MyStack.empty out_stack) then begin
match MyStack.pop out_stack with
| Freeze _ -> close_rec ()
| Normal (_,_,pout) ->
Out.copy !cur_out.out pout.out ;
cur_out := pout ;
close_rec ()
end in
close_rec ()
end ;
Out.close !cur_out.out ;
!cur_out.out <- Out.create_null ()
;;
let put_separator () = put "\n"
;;
let unskip () =
Out.unskip !cur_out.out;
if flags.blank then
flags.empty <- true;
;;
let put_tag tag = put tag
;;
let put_nbsp () =
if !Lexstate.whitepre || (flags.in_math && !Parse_opts.mathml) then begin
put_char ' '
end else
put_unicode OutUnicode.nbsp
;;
let put_open_group () =
put_char '{'
;;
let put_close_group () =
put_char '}'
;;
let infomenu _ = ()
and infonode _opt _num _arg = ()
and infoextranode _num _arg _text = ()
;;
let image arg n =
if flags.in_pre && !Parse_opts.pedantic then begin
warning "Image tag inside preformatted block, ignored"
end else begin
put "<IMG " ;
if arg <> "" then begin
put arg;
put_char ' '
end ;
put "SRC=\"" ;
put n ;
if !Parse_opts.pedantic then begin
put "\" ALT=\"" ;
put n
end ;
put "\">"
end
;;
type saved = HtmlCommon.saved
let check = HtmlCommon.check
and hot = HtmlCommon.hot
let forget_par () = None
let rec do_open_par () = match pblock () with
| GROUP ->
let pending = to_pending !cur_out.pending !cur_out.active in
let a,b,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
do_open_par () ;
open_block a b ;
!cur_out.pending <- pending
| P ->
Misc.warning "Opening P twice" (* An error in fact ! *)
| s ->
if !verbose > 2 then
Printf.eprintf "Opening par below: '%s'\n" (string_of_block s) ;
open_block P ""
let open_par () = do_open_par ()
let rec do_close_par () = match pblock () with
| GROUP ->
let pending = to_pending !cur_out.pending !cur_out.active in
let a,b,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
let r = do_close_par () in
open_block a b ;
!cur_out.pending <- pending ;
r
| P ->
ignore (close_flow_loc check_blank P) ;
true
| _ ->
false
let close_par () = do_close_par ()
(* Find P, maybe above groups *)
let rec find_prev_par () = match pblock () with
| P -> true
| GROUP ->
let x = pop_out out_stack in
let r = find_prev_par () in
push_out out_stack x ;
r
| _ -> false
let rec do_close_prev_par () = match pblock () with
| P ->
ignore (close_flow_loc check_blank P)
| GROUP ->
let pending = to_pending !cur_out.pending !cur_out.active in
let b,a,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
do_close_prev_par () ;
open_block b a ;
!cur_out.pending <- pending
| _ -> assert false
let close_prev_par () =
do_close_prev_par () ;
flags.saw_par <- true
let rec do_par () = match pblock () with
| P ->
ignore (close_flow_loc check_blank P) ; open_block P ""
| GROUP ->
let pending = to_pending !cur_out.pending !cur_out.active in
let b,a,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
do_par () ;
open_block b a ;
!cur_out.pending <- pending
| s ->
if !verbose > 2 then
Printf.eprintf "Opening par below: '%s'\n" (string_of_block s) ;
open_block P ""
let par _ = do_par ()
(* Interface open block: manage par above *)
let open_block_loc = open_block (* save a reference to basic open_block *)
let open_block_with_par ss s a =
if transmit_par s && find_prev_par () then begin
if !verbose > 2 then begin
Printf.eprintf "OPEN: %s, closing par\n" ss ;
Printf.eprintf "BEFORE: " ;
pretty_stack out_stack
end ;
close_prev_par () ;
if !verbose > 2 then begin
Printf.eprintf "AFTER: " ;
pretty_stack out_stack
end
end ;
open_block_loc s a
let open_block ss a = open_block_with_par ss (find_block ss) a
let open_display () =
if find_prev_par () then begin
close_prev_par ()
end ;
do_open_display ()
and open_display_varg a =
if find_prev_par () then begin
close_prev_par ()
end ;
do_open_display_varg a
and close_display () =
do_close_display () ;
if flags.saw_par then begin
flags.saw_par <- false ;
open_par ()
end
let open_maths display =
if display && find_prev_par () then begin
close_prev_par ()
end ;
do_open_maths display
and close_maths display =
do_close_maths display ;
if flags.saw_par then begin
flags.saw_par <- false ;
open_par ()
end
let wrap_close close_block s =
let s = find_block s in
begin match s with GROUP -> () | _ -> ignore (close_par ()) end ;
begin match s with
| UL|OL ->
if flags.nitems > 0 then
close_block LI
else
warning "List with no item"
| DL ->
if flags.nitems > 0 then
close_block DD
else
warning "List with no item"
| _ -> ()
end ;
close_block s ;
if flags.saw_par then begin
flags.saw_par <- false ;
if !verbose > 2 then begin
Misc.warning "RE-OPEN PAR:" ;
Printf.eprintf "BEFORE: " ;
pretty_stack out_stack
end ;
open_par () ;
if !verbose > 2 then begin
Printf.eprintf "AFTER: " ;
pretty_stack out_stack
end
end
let force_block_with_par s content =
ignore (close_par ()) ;
force_block s content
and close_block_with_par s =
ignore (close_par ()) ;
close_block s
and erase_block_with_par s =
ignore (close_par ()) ;
erase_block s
and force_block s content = wrap_close (fun s -> force_block s content) s
and close_block s = wrap_close close_block s
and erase_block s = wrap_close erase_block s
and close_flow s =
prerr_endline ("FLOW: "^s) ;
wrap_close close_flow s
let skip_line = skip_line
and flush_out = flush_out
and close_group = close_group
and open_aftergroup = open_aftergroup
and open_group = open_group
and insert_block s attr =
if find_prev_par () then
warning "Ignoring \\centering or \\ragged..."
else
insert_block (find_block s) attr
and insert_attr s = insert_attr (find_block s)
and erase_mods = erase_mods
and open_mod = open_mod
and has_mod = has_mod
and clearstyle = clearstyle
and nostyle = nostyle
and get_fontsize = get_fontsize
and to_string = to_string
;;
(****************************************)
(* Table stuff, must take P into acount *)
(****************************************)
let open_table border htmlargs =
let _,arg_b, arg =
if flags.in_math && !Parse_opts.mathml then
"mtable","frame = \"solid\"",""
else "TABLE","BORDER=1",htmlargs
in
(* open_block will close P (and record that) if appropriate *)
if border then open_block_with_par "TABLE" TABLE (arg_b^" "^arg)
else open_block_with_par "TABLE" TABLE arg
;;
let new_row () =
if flags.in_math && !Parse_opts.mathml then
open_block_loc (OTHER "mtr") ""
else open_block_loc TR ""
;;
let attribut name = function
| "" -> ""
| s -> " "^name^"="^s
and as_colspan = function
| 1 -> ""
| n -> " COLSPAN="^string_of_int n
and as_colspan_mathml = function
| 1 -> ""
| n -> " columnspan= \""^string_of_int n^"\""
let as_align f span = match f with
Tabular.Align
{Tabular.vert=v ; Tabular.hor=h ;
Tabular.wrap=w ; Tabular.width=_} ->
attribut "VALIGN" v^
attribut "ALIGN" h^
(if w then "" else " NOWRAP")^
as_colspan span
| _ -> raise (Misc.Fatal ("as_align"))
;;
let as_align_mathml f span = match f with
Tabular.Align
{Tabular.vert=v ; Tabular.hor=h } ->
attribut "rowalign" ("\""^v^"\"")^
attribut "columnalign" ("\""^h^"\"")^
as_colspan_mathml span
| _ -> raise (Misc.Fatal ("as_align_mathml"))
;;
let open_direct_cell attrs span =
if flags.in_math && !Parse_opts.mathml then begin
open_block_loc (OTHER "mtd") (attrs^as_colspan_mathml span);
do_open_display ()
end else open_block_loc TD (attrs^as_colspan span)
let open_cell format span _=
if flags.in_math && !Parse_opts.mathml then begin
open_block_loc (OTHER "mtd") (as_align_mathml format span);
do_open_display ()
end else open_block_loc TD (as_align format span)
;;
(* By contrast closing/erasing TD, may in some occasions
implies closing some internal P => use wrapped close functions *)
let erase_cell () =
if flags.in_math && !Parse_opts.mathml then begin
erase_display ();
erase_block_with_par (OTHER "mtd")
end else erase_block_with_par TD
and close_cell content =
if flags.in_math && !Parse_opts.mathml then begin
do_close_display ();
force_block_with_par (OTHER "mtd") ""
end else force_block_with_par TD content
and do_close_cell () =
if flags.in_math && !Parse_opts.mathml then begin
do_close_display ();
close_block_with_par (OTHER "mtd")
end else close_block_with_par TD
and open_cell_group () = open_group ""
and close_cell_group () = close_group ()
and erase_cell_group () = erase_group ()
;;
let erase_row () =
if flags.in_math && !Parse_opts.mathml then
HtmlCommon.erase_block (OTHER "mtr")
else HtmlCommon.erase_block TR
and close_row () =
if flags.in_math && !Parse_opts.mathml then
HtmlCommon.close_block (OTHER "mtr")
else HtmlCommon.close_block TR
;;
let close_table () =
begin if flags.in_math && !Parse_opts.mathml then
HtmlCommon.close_block (OTHER "mtable")
else HtmlCommon.close_block TABLE
end ;
if flags.saw_par then begin
flags.saw_par <- false ;
open_par ()
end
;;
let make_border _ = ()
;;
let center_format =
Tabular.Align {Tabular.hor="center" ; Tabular.vert = "top" ;
Tabular.wrap = false ; Tabular.pre = "" ;
Tabular.post = "" ; Tabular.width = Length.Default}
;;
let make_inside s multi =
if not (multi) then begin
if pblock ()=TD || pblock() = (OTHER "mtd") then begin
close_cell " ";
open_cell center_format 1 0;
put s;
end else begin
open_cell center_format 1 0;
put s;
close_cell " "
end;
end
;;
let make_hline w noborder =
if noborder then begin
new_row ();
if not (flags.in_math && !Parse_opts.mathml) then begin
open_direct_cell "CLASS=\"hbar\"" w ;
close_cell ""
end else begin
open_cell center_format w 0;
close_mods () ;
put "<mo stretchy=\"true\" > ― </mo>";
force_item_display ();
close_cell ""
end;
close_row ();
end
;;
(* HR is not correct inside P *)
let horizontal_line attr width height =
if find_prev_par () then begin
close_prev_par ()
end ;
horizontal_line attr width height ;
if flags.saw_par then begin
flags.saw_par <- false ;
open_par ()
end
(* Lists also have to take P into account *)
let rec do_li s = match pblock () with
| P ->
let pend = to_pending !cur_out.pending !cur_out.active in
ignore (close_flow_loc check_blank P) ;
do_li s ;
!cur_out.pending <- pend
| LI ->
ignore (close_flow_loc no_check LI) ;
open_block_loc LI s
| GROUP ->
let pend = to_pending !cur_out.pending !cur_out.active in
let a,b,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
do_li s ;
open_block_loc a b ;
!cur_out.pending <- pend
| _ -> assert false
let item s =
if !verbose > 2 then begin
prerr_string "=> item: stack=" ;
pretty_stack out_stack
end ;
if flags.nitems > 0 then begin
do_li s
end else begin
let saved =
let pending = to_pending !cur_out.pending !cur_out.active in
do_close_mods () ;
ignore (close_par ()) ; (* in case some par opened before first \item *)
let r = Out.to_string !cur_out.out in
!cur_out.pending <- pending ;
r in
open_block_loc LI s ;
do_put saved
end ;
if !verbose > 2 then begin
prerr_string "<= item: stack=" ;
pretty_stack out_stack
end ;
flags.nitems <- flags.nitems+1
let nitem = item
let set_dt s = flags.dt <- s
and set_dcount s = flags.dcount <- s
;;
(*********************************************)
(* s1 and s2 below are attributes to DR/DD *)
(*********************************************)
let emit_dt_dd scan true_scan arg s1 s2 =
open_block_loc DT s1 ;
if flags.dcount <> "" then scan ("\\refstepcounter{"^ flags.dcount^"}") ;
true_scan ("\\makelabel{"^arg^"}") ;
ignore (close_block_loc no_check DT) ;
open_block_loc DD s2
let rec do_dt_dd scan true_scan arg s1 s2 = match pblock () with
| P ->
let pend = to_pending !cur_out.pending !cur_out.active in
ignore (close_flow_loc check_blank P) ;
do_dt_dd scan true_scan arg s1 s2 ;
!cur_out.pending <- pend
| DD ->
ignore (close_flow_loc no_check DD) ;
emit_dt_dd scan true_scan arg s1 s2
| GROUP ->
let pend = to_pending !cur_out.pending !cur_out.active in
let a,b,_ = top_out out_stack in
ignore (close_block_loc check_empty GROUP) ;
do_dt_dd scan true_scan arg s1 s2 ;
open_block_loc a b ;
!cur_out.pending <- pend
| _ -> assert false
let ditem scan arg s1 s2 =
if !verbose > 2 then begin
Printf.eprintf "=> DITEM: %s %s %s\n" arg s1 s2 ;
prerr_string "ditem: stack=" ;
pretty_stack out_stack
end ;
let true_scan =
if flags.nitems = 0 then begin
let pending = to_pending !cur_out.pending !cur_out.active in
do_close_mods () ;
ignore (close_par ()) ; (* in case some par opened before first \item *)
let saved = Out.to_string !cur_out.out in
!cur_out.pending <- pending ;
(fun arg -> do_put saved ; scan arg)
end
else scan in
begin if flags.nitems > 0 then
do_dt_dd scan true_scan arg s1 s2
else
emit_dt_dd scan true_scan arg s1 s2
end ;
flags.nitems <- flags.nitems+1 ;
if !verbose > 2 then begin
Printf.eprintf "<= DITEM: %s %s %s\n" arg s1 s2 ;
prerr_string "ditem: stack=" ;
pretty_stack out_stack
end ;
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