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Progress on PDF/UA-2 TOC

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John Whitington 2025-03-20 12:28:18 +00:00
parent 960b444e6e
commit f81920c997
1 changed files with 32 additions and 30 deletions
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62
cpdftoc.ml
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@ -171,7 +171,7 @@ let typeset_table_of_contents ~font ~fontsize ~title ~bookmark ~dotleader ~proce
let optional l = if process_struct_tree then l else [] in
if process_struct_tree then ensure_minimal_struct_tree pdf;
Hashtbl.clear width_table_cache;
let marks = Pdfmarks.read_bookmarks ~preserve_actions:false pdf in
let marks = Pdfmarks.read_bookmarks ~preserve_actions:true pdf in
if marks = [] then (Pdfe.log "No bookmarks, not making table of contents\n"; pdf) else
let labels = Pdfpagelabels.read pdf in
let refnums = Pdf.page_reference_numbers pdf in
@ -273,22 +273,22 @@ let typeset_table_of_contents ~font ~fontsize ~title ~bookmark ~dotleader ~proce
Pdfpagelabels.startpage = 1;
Pdfpagelabels.startvalue = 1}
in
if process_struct_tree then
begin
(* Get indirect of top-level /Document *)
let top_level_document =
match subformat with Some Cpdfua.PDFUA2 ->
begin match Pdf.lookup_chain pdf pdf.Pdf.trailerdict ["/Root"; "/StructTreeRoot"] with
| Some d ->
begin match Pdf.lookup_immediate "/K" d with
| Some (Pdf.Indirect i) -> i
| Some (Pdf.Array [Pdf.Indirect i]) -> i
| _ -> 0
end
(* Get indirect of top-level /Document *)
let top_level_document =
match subformat with Some Cpdfua.PDFUA2 ->
begin match Pdf.lookup_chain pdf pdf.Pdf.trailerdict ["/Root"; "/StructTreeRoot"] with
| Some d ->
begin match Pdf.lookup_immediate "/K" d with
| Some (Pdf.Indirect i) -> i
| Some (Pdf.Array [Pdf.Indirect i]) -> i
| _ -> 0
end
| _ -> 0
in
| _ -> 0
end
| _ -> 0
in
if process_struct_tree then
begin
let struct_tree_root =
if top_level_document > 0 then top_level_document else
match Pdf.lookup_immediate "/StructTreeRoot" (Pdf.lookup_obj pdf pdf.Pdf.root) with
@ -367,22 +367,20 @@ let typeset_table_of_contents ~font ~fontsize ~title ~bookmark ~dotleader ~proce
assumption is ok because /P entries must have an indirect to point
to. So if the document contains anything, the /Document structelem
must be indirect. *)
(* FIXME Move this code up, and return i so we can put the proper /P parent entries in our structure elements. They should point to /Document now not the /StructTreeRoot. *)
begin match Pdf.lookup_chain pdf pdf.Pdf.trailerdict ["/Root"; "/StructTreeRoot"] with
| Some d ->
if top_level_document = 0 then () else
let obj = Pdf.lookup_obj pdf top_level_document in
let obj' =
let k' =
match Pdf.lookup_direct pdf "/K" obj with
| Some (Pdf.Array a) -> Pdf.Array (prepending_structitems @ a)
| Some (Pdf.Dictionary d) -> Pdf.Array (prepending_structitems @ [Pdf.Dictionary d])
| _ -> Pdf.Null
in
Pdf.add_dict_entry obj "/K" k'
if top_level_document = 0 then () else
let obj = Pdf.lookup_obj pdf top_level_document in
let obj' =
let k' =
match Pdf.lookup_direct pdf "/K" obj with
| Some (Pdf.Array a) -> Pdf.Array (prepending_structitems @ a)
| Some (Pdf.Dictionary d) -> Pdf.Array (prepending_structitems @ [Pdf.Dictionary d])
| _ -> Pdf.Null
in
Pdf.addobj_given_num pdf (top_level_document, obj')
Pdf.add_dict_entry obj "/K" k'
in
Pdf.addobj_given_num pdf (top_level_document, obj')
| _ -> ()
end
else
@ -398,12 +396,16 @@ let typeset_table_of_contents ~font ~fontsize ~title ~bookmark ~dotleader ~proce
let labels' = label::map (fun l -> {l with Pdfpagelabels.startpage = l.Pdfpagelabels.startpage + toc_pages_len}) labels in
Pdfpagelabels.write pdf labels';
if bookmark then
let marks = Pdfmarks.read_bookmarks ~preserve_actions:false pdf in
let marks = Pdfmarks.read_bookmarks ~preserve_actions:true pdf in
let refnums = Pdf.page_reference_numbers pdf in
let newmark =
{Pdfmarks.level = 0;
Pdfmarks.text = Pdftext.pdfdocstring_of_utf8 (implode (real_newline (explode title)));
Pdfmarks.target = Pdfdest.XYZ (Pdfdest.PageObject (hd refnums), None, None, None);
Pdfmarks.target =
if subformat = Some Cpdfua.PDFUA2 then
Pdfdest.XYZ (Pdfdest.PageObject top_level_document, None, None, None)
else
Pdfdest.XYZ (Pdfdest.PageObject (hd refnums), None, None, None);
Pdfmarks.isopen = false;
Pdfmarks.colour = (0., 0., 0.);
Pdfmarks.flags = 0}