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first complete replace_obj

This commit is contained in:
John Whitington 2024-09-03 17:45:55 +01:00
parent a147fb6f62
commit 094a0d01b5
1 changed files with 26 additions and 22 deletions
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cpdfcommand.ml
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@ -3450,8 +3450,9 @@ let extract_stream pdf decomp objnum =
(* Empty string is trailerdict. Begins with / and it's a chain separated by (* Empty string is trailerdict. Begins with / and it's a chain separated by
commas. Begins with P and it's a page number then a (possibly empty) chain. commas. Begins with P and it's a page number then a (possibly empty) chain.
Otherwise it's an object number (0 = trailerdict). *) Otherwise it's an object number (0 = trailerdict). *)
let split_chain str = map (fun x -> "/" ^ x) (tl (String.split_on_char '/' str))
let print_obj pdf objspec = let print_obj pdf objspec =
let split str = map (fun x -> "/" ^ x) (tl (String.split_on_char '/' str)) in
let simple_obj obj = let simple_obj obj =
let obj = if obj = 0 then pdf.Pdf.trailerdict else Pdf.lookup_obj pdf obj in let obj = if obj = 0 then pdf.Pdf.trailerdict else Pdf.lookup_obj pdf obj in
Printf.printf "%S\n" (Pdfwrite.string_of_pdf obj) Printf.printf "%S\n" (Pdfwrite.string_of_pdf obj)
@ -3467,34 +3468,36 @@ let print_obj pdf objspec =
let number, chain = let number, chain =
let digits, rest = cleavewhile isdigit more in let digits, rest = cleavewhile isdigit more in
List.nth (Pdf.page_reference_numbers pdf) (int_of_string (implode digits) - 1), List.nth (Pdf.page_reference_numbers pdf) (int_of_string (implode digits) - 1),
begin match split (implode rest) with [""] -> [] | x -> x end begin match split_chain (implode rest) with [""] -> [] | x -> x end
in in
chain_obj number chain chain_obj number chain
| '/'::more -> chain_obj 0 (split (implode ('/'::more))) | '/'::more -> chain_obj 0 (split_chain (implode ('/'::more)))
| [] -> simple_obj 0 | [] -> simple_obj 0
| _ -> simple_obj (int_of_string objspec) | _ -> simple_obj (int_of_string objspec)
(* Empty string is trailerdict. Begins with / and it's a chain separated by (* Empty string is trailerdict. Begins with / and it's a chain separated by commas. *)
commas. Begins with P and it's a page number then a (possibly empty) chain.
Otherwise it's an object number (0 = trailerdict). *)
let replace_obj pdf objspec obj = let replace_obj pdf objspec obj =
let key, rest = let key, chain =
let r, rest = cleavewhile (neq '/') (rev (explode objspec)) in let r, rest = cleavewhile (neq '/') (rev (explode objspec)) in
(implode ('/'::rev r), implode (rev (tl rest))) (implode ('/'::rev r), split_chain (implode (rev (tl rest))))
in in
() let rec find_max_existing to_fake chain =
(*match .... rest .... with if chain = [] then (chain, to_fake) else
| ...not objnum... -> match Pdf.lookup_chain pdf pdf.Pdf.trailerdict chain with
(* 1. It's not an object number *) | None -> find_max_existing (hd chain::to_fake) (tl chain)
let chain = | _ -> (chain, to_fake)
(* 1. Chain with /s *)
(* 2. P plus possibly empty chain *)
[]
in in
Pdf.replace_chain pdf chain (k, obj) let rec wrap_obj obj = function
(* 2. It is an object number *) | [] -> obj
| _ -> | h::t -> Pdf.Dictionary [(h, wrap_obj obj t)]
(* Replace chain within object. How? *)*) in
let chain, to_fake = find_max_existing [] chain in
let obj = wrap_obj obj to_fake in
Printf.printf "obj is %s\n" (Pdfwrite.string_of_pdf obj);
Printf.printf "chain is:\n";
iter (Printf.printf "%s ") chain;
Printf.printf "\n";
Pdf.replace_chain pdf chain (key, obj)
(* Main function *) (* Main function *)
let go () = let go () =
@ -4522,7 +4525,8 @@ let go () =
print_obj pdf s print_obj pdf s
| Some (ReplaceObj (a, b)) -> | Some (ReplaceObj (a, b)) ->
let pdf = get_single_pdf args.op false in let pdf = get_single_pdf args.op false in
replace_obj pdf a b let pdfobj = Cpdfjson.object_of_json (Cpdfyojson.Safe.from_string b) in
replace_obj pdf a pdfobj
| Some (Verify standard) -> | Some (Verify standard) ->
begin match standard with begin match standard with
| "PDF/UA-1(matterhorn)" -> | "PDF/UA-1(matterhorn)" ->