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Improve detection of PDF/A files

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John Whitington 2025-03-27 16:01:02 +00:00
parent af24a461f0
commit 959a230c95
1 changed files with 28 additions and 7 deletions
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35
cpdfmetadata.ml
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@ -416,6 +416,8 @@ let xmp = "http://ns.adobe.com/xap/1.0/"
let dc = "http://purl.org/dc/elements/1.1/"
let rdf = "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
let pdfaid = "http://www.aiim.org/pdfa/ns/id/"
let pdfaid_wrong_iso19005_1 = "http://www.aiim.org/pdfa/ns/id"
let pdfaid_wrong_acrobat_707 = "http://www.aiim.org/pdfa/ns/id.html"
let pdfxid = "http://www.npes.org/pdfx/ns/id/"
let pdfe = "http://www.aiim.org/pdfe/ns/id/"
let pdfuaid = "http://www.aiim.org/pdfua/ns/id/"
@ -447,6 +449,17 @@ let collect_list_items_all all =
let rec get_data_for namespace name = function
D _ -> None
| E (((_, _), attrs), []) ->
begin match
option_map
(function
((n, n'), str) when n = namespace && n' = name -> Some str
| _ -> None)
attrs
with
| h::_ -> Some h
| [] -> None
end
| E (((n, n'), _), [D d]) when n = namespace && n' = name ->
Some d
| E (((n, n'), _), e) when n = namespace && n' = name ->
@ -456,7 +469,7 @@ let rec get_data_for namespace name = function
x :: _ -> Some x
| _ -> None
(* PDF/A: <pdfaid:part>2</pdfaid:part> <pdfaid:conformance>B</pdfaid:conformance>
(* PDF/A: <pdfaid:part>2</pdfaid:part> <pdfaid:conformance>B</pdfaid:conformance> or pdfaid:part="2" pdfaid:conformance="B"
PDF/E: <pdfe:ISO_PDFEVersion>PDF/E-1</pdfe:ISO_PDFEVersion>
PDF/VT: <pdfvtid:GTS_PDFVTVersion>PDF/VT-1</pdfvtid:GTS_PDFVTVersion>
PDF/UA: <pdfuaid:part>1</pdfuaid:part>
@ -489,15 +502,23 @@ let determine_subformats pdf =
| None -> ()
end;
(* PDF/A *)
begin match get_data_for pdfaid "part" tree with
| Some part ->
begin match
get_data_for pdfaid "part" tree,
get_data_for pdfaid_wrong_acrobat_707 "part" tree,
get_data_for pdfaid_wrong_iso19005_1 "part" tree
with
| (Some part, _, _) | (_, Some part, _) | (_, _, Some part) ->
let conformance =
match get_data_for pdfaid "conformance" tree with
| Some s -> String.lowercase_ascii s
| None -> ""
match
get_data_for pdfaid "conformance" tree,
get_data_for pdfaid_wrong_acrobat_707 "conformance" tree,
get_data_for pdfaid_wrong_iso19005_1 "conformance" tree
with
| (Some s, _, _) | (_, Some s, _) | (_, _, Some s) -> String.lowercase_ascii s
| _ -> ""
in
formats =| "PDF/A-" ^ part ^ conformance
| None -> ()
| _ -> ()
end;
(* PDF/X *)
begin match get_data_for pdfxid "GTS_PDFXVersion" tree with