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Tag paragraphs in Cpdftexttopdf

This commit is contained in:
John Whitington 2024-10-02 14:45:40 +01:00
parent 369a44238b
commit 7ee3d1997d
2 changed files with 18 additions and 2 deletions
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18
cpdftexttopdf.ml
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@ -44,6 +44,16 @@ let of_utf8_with_newlines fontpack fontsize t =
if c <> [] then process_codepoints c; if c <> [] then process_codepoints c;
rev !items rev !items
(* Post process, adding Tag / EndTag around paragraphs *)
let rec tag_paragraphs = function
| Cpdftype.NewLine::Cpdftype.NewLine::t ->
Cpdftype.EndTag::Cpdftype.NewLine::Cpdftype.NewLine::Cpdftype.Tag "P"::tag_paragraphs t
| x::t -> x::tag_paragraphs t
| [] -> [Cpdftype.EndTag]
let tag_paragraphs l =
Cpdftype.Tag "P"::tag_paragraphs l
let typeset ~process_struct_tree ?subformat ?title ~papersize ~font ~fontsize text = let typeset ~process_struct_tree ?subformat ?title ~papersize ~font ~fontsize text =
let process_struct_tree = let process_struct_tree =
process_struct_tree || subformat = Some Cpdfua.PDFUA1 || subformat = Some Cpdfua.PDFUA2 process_struct_tree || subformat = Some Cpdfua.PDFUA1 || subformat = Some Cpdfua.PDFUA2
@ -72,10 +82,14 @@ let typeset ~process_struct_tree ?subformat ?title ~papersize ~font ~fontsize te
raise (Pdf.PDFError "Can't use existing named font for text-to-PDF") raise (Pdf.PDFError "Can't use existing named font for text-to-PDF")
in in
let instrs = of_utf8_with_newlines fontpack fontsize (Pdfio.string_of_bytes text) in let instrs = of_utf8_with_newlines fontpack fontsize (Pdfio.string_of_bytes text) in
flprint (Cpdftype.to_string instrs);
flprint "------------------------------";
let tagged = tag_paragraphs instrs in
flprint (Cpdftype.to_string tagged);
let margin = Pdfunits.points (Pdfpaper.width papersize) (Pdfpaper.unit papersize) /. 15. in let margin = Pdfunits.points (Pdfpaper.width papersize) (Pdfpaper.unit papersize) /. 15. in
let instrs = let instrs =
if instrs = [] then [] else if tagged = [] then [] else
let firstfont = hd (keep (function Cpdftype.Font _ -> true | _ -> false) instrs) in let firstfont = hd (keep (function Cpdftype.Font _ -> true | _ -> false) tagged) in
[firstfont; Cpdftype.BeginDocument] @ instrs [firstfont; Cpdftype.BeginDocument] @ instrs
in in
let pages = Cpdftype.typeset ~process_struct_tree margin margin margin margin papersize pdf instrs in let pages = Cpdftype.typeset ~process_struct_tree margin margin margin margin papersize pdf instrs in

2
cpdftype.ml
View File

@ -320,6 +320,8 @@ let typeset ~process_struct_tree lmargin rmargin tmargin bmargin papersize pdf i
thispageannotations := map annot !thisdestrectangles @ !thispageannotations; thispageannotations := map annot !thisdestrectangles @ !thispageannotations;
s.dest <- None; s.dest <- None;
thisdestrectangles := [] thisdestrectangles := []
| Tag s -> ()
| EndTag -> ()
in in
iter typeset_element i; iter typeset_element i;
write_page (); write_page ();