-create-metadata finished

cpdf.ml

@@ -4,6 +4,45 @@ open Pdfio
 
 let debug = ref false
 
+let xmp_template =
+{|<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
+
+<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
+ xmlns:iX='http://ns.adobe.com/iX/1.0/'>
+
+ <rdf:Description about=''
+  xmlns='http://ns.adobe.com/pdf/1.3/'
+  xmlns:pdf='http://ns.adobe.com/pdf/1.3/'>
+  <pdf:CreationDate>CREATEDATE</pdf:CreationDate>
+  <pdf:ModDate>MODDATE</pdf:ModDate>
+  <pdf:Producer>PRODUCER</pdf:Producer>
+  <pdf:Creator>CREATOR</pdf:Creator>
+  <pdf:Title>TITLE</pdf:Title>
+  <pdf:Subject>SUBJECT</pdf:Subject>
+  <pdf:Author>AUTHOR</pdf:Author>
+  <pdf:Keywords>KEYWORDS</pdf:Keywords>
+  <pdf:Trapped>TRAPPED</pdf:Trapped>
+ </rdf:Description>
+
+ <rdf:Description about=''
+  xmlns='http://ns.adobe.com/xap/1.0/'
+  xmlns:xap='http://ns.adobe.com/xap/1.0/'>
+   <xap:CreateDate>CREATEDATE</xap:CreateDate>
+   <xap:CreatorTool>CREATOR</xap:CreatorTool>
+   <xap:ModifyDate>MODDATE</xap:ModifyDate>
+   <xap:MetadataDate>METADATADATE</xap:MetadataDate>
+ </rdf:Description>
+
+ <rdf:Description about=''
+  xmlns='http://purl.org/dc/elements/1.1/'
+  xmlns:dc='http://purl.org/dc/elements/1.1/'>
+   <dc:title>TITLE</dc:title>
+ </rdf:Description>
+
+</rdf:RDF>
+
+<?xpacket end='r'?>|}
+
 (* For debugging *)
 let report_pdf_size pdf =
   Pdf.remove_unreferenced pdf;
@@ -1171,6 +1210,8 @@ let set_metadata keepversion filename pdf =
       done;
       set_metadata_from_bytes keepversion data pdf
 
+
+
 (* \section{Remove metadata} *)
 let remove_metadata pdf =
   match Pdf.lookup_direct pdf "/Root" pdf.Pdf.trailerdict with
@@ -3212,7 +3253,9 @@ let get_info raw pdf =
       match Pdf.lookup_direct pdf name infodict with
       | Some (Pdf.String s) ->
           if raw then s else crude_de_unicode s
-      | _ -> ""
+      | Some (Pdf.Boolean false) -> "False"
+      | Some (Pdf.Boolean true) -> "True"
+      | _ -> if name = "/Trapped" then "False" else ""
     in
       getstring
        
@@ -3225,7 +3268,9 @@ let get_info_utf8 pdf =
     (function name ->
       match Pdf.lookup_direct pdf name infodict with
       | Some (Pdf.String s) -> Pdftext.utf8_of_pdfdocstring s
-      | _ -> "")
+      | Some (Pdf.Boolean false) -> "False"
+      | Some (Pdf.Boolean true) -> "True"
+      | _ -> if name = "/Trapped" then "False" else "")
 
 let getstring encoding pdf =
   match encoding with
@@ -3244,7 +3289,8 @@ let output_info encoding pdf =
     Printf.printf "Creator: %s\n" (getstring "/Creator");
     Printf.printf "Producer: %s\n" (getstring "/Producer");
     Printf.printf "Created: %s\n" (getstring "/CreationDate");
-    Printf.printf "Modified: %s\n" (getstring "/ModDate")
+    Printf.printf "Modified: %s\n" (getstring "/ModDate");
+    Printf.printf "Trapped: %s\n" (getstring "/Trapped")
 
 type xmltree =
     E of Xmlm.tag * xmltree list
@@ -3353,7 +3399,6 @@ let output_xmp_info encoding pdf =
         try
           let dtd, tree = xmltree_of_bytes metadata in
             print_out tree "XMP pdf:Keywords" adobe "Keywords";
-            print_out tree "XMP pdf:PDFVersion" adobe "PDFVersion";
             print_out tree "XMP pdf:Producer" adobe "Producer";
             print_out tree "XMP pdf:Trapped" adobe "Trapped";
             print_out tree "XMP pdf:Title" adobe "Title";
@@ -3373,13 +3418,13 @@ let output_xmp_info encoding pdf =
           _ -> ()
 
 (* Set XMP info *)
-let rec set_xml_field only_when_present kind fieldname value = function
+let rec set_xml_field kind fieldname value = function
   D data -> D data
 | E (((n, n'), m), [D _]) when n = kind && n' = fieldname ->
     E (((n, n'), m), [D value])
-| E (x, ts) -> E (x, List.map (set_xml_field only_when_present kind fieldname value) ts)
+| E (x, ts) -> E (x, List.map (set_xml_field kind fieldname value) ts)
 
-let set_pdf_info_xml only_when_present kind fieldname value xmldata pdf =
+let set_pdf_info_xml kind fieldname value xmldata pdf =
   let dtd, tree = xmltree_of_bytes xmldata in
   let str =
     match value with
@@ -3388,14 +3433,14 @@ let set_pdf_info_xml only_when_present kind fieldname value xmldata pdf =
     | Pdf.Boolean false -> "False"
     | _ -> failwith "set_pdf_info_xml: not a string"
   in
-  let newtree = set_xml_field only_when_present kind fieldname str tree in
+  let newtree = set_xml_field kind fieldname str tree in
     bytes_of_xmltree (dtd, newtree)
 
-let set_pdf_info_xml_many only_when_present changes value xmldata pdf =
+let set_pdf_info_xml_many changes value xmldata pdf =
   let xmldata = ref xmldata in
     List.iter
       (fun (kind, fieldname) ->
-         xmldata := set_pdf_info_xml only_when_present kind fieldname value !xmldata pdf)
+         xmldata := set_pdf_info_xml kind fieldname value !xmldata pdf)
       changes;
     !xmldata
 
@@ -3508,7 +3553,7 @@ let xmp_date date =
   with
     Exit -> make_xmp_date_from_components d
 
-let set_pdf_info ?(xmp_also=false) ?(xmp_also_when_present=false) ?(xmp_just_set=false) (key, value, version) pdf =
+let set_pdf_info ?(xmp_also=false) ?(xmp_just_set=false) (key, value, version) pdf =
   let infodict =
     match Pdf.lookup_direct pdf "/Info" pdf.Pdf.trailerdict with
     | Some d -> d
@@ -3523,7 +3568,7 @@ let set_pdf_info ?(xmp_also=false) ?(xmp_also_when_present=false) ?(xmp_just_set
             pdf.Pdf.minor <-
               max pdf.Pdf.minor version
           end;
-        if xmp_also || xmp_also_when_present then
+        if xmp_also then
           begin match get_metadata pdf with
             None -> pdf
           | Some xmldata ->
@@ -3543,14 +3588,14 @@ let set_pdf_info ?(xmp_also=false) ?(xmp_also_when_present=false) ?(xmp_just_set
               in
                 set_metadata_from_bytes
                   true
-                  (set_pdf_info_xml_many xmp_also_when_present changes value xmldata pdf)
+                  (set_pdf_info_xml_many changes value xmldata pdf)
                   pdf
           end
        else
          pdf
 
 (* Set metadata date *)
-let set_metadata_date pdf date only_when_present =
+let set_metadata_date pdf date =
   match get_metadata pdf with
     None -> pdf
   | Some xmldata ->
@@ -3558,9 +3603,29 @@ let set_metadata_date pdf date only_when_present =
       let value = match date with "now" -> xmp_date (expand_date "now") | x -> x in
         set_metadata_from_bytes
           true
-          (set_pdf_info_xml_many only_when_present changes (Pdf.String value) xmldata pdf)
+          (set_pdf_info_xml_many changes (Pdf.String value) xmldata pdf)
           pdf
 
+let replacements pdf =
+  let info = get_info_utf8 pdf in
+    [("CREATEDATE", xmp_date (info "/CreationDate"));
+     ("MODDATE", xmp_date (info "/ModDate"));
+     ("PRODUCER", info "/Producer");
+     ("CREATOR", info "/Creator");
+     ("TITLE", info "/Title");
+     ("SUBJECT", info "/Subject");
+     ("AUTHOR", info "/Author");
+     ("KEYWORDS", info "/Keywords");
+     ("TRAPPED", info "/Trapped");
+     ("METADATADATE", xmp_date (expand_date "now"))]
+
+let create_metadata pdf =
+  let xmp = ref xmp_template in
+  List.iter
+    (fun (s, r) -> xmp := string_replace_all s r !xmp)
+    (replacements pdf);
+  set_metadata_from_bytes false (bytes_of_string !xmp) pdf
+
 (* \section{Blacken text} *)
 
 (*

cpdf.mli

@@ -112,7 +112,7 @@ val copy_id : bool -> Pdf.t -> Pdf.t -> Pdf.t
 
 (** [set_pdf_info (key, value, version)] sets the entry [key] in the /Info directory, updating
 the PDF minor version to [version].*)
-val set_pdf_info : ?xmp_also:bool -> ?xmp_also_when_present:bool -> ?xmp_just_set:bool -> (string * Pdf.pdfobject * int) -> Pdf.t -> Pdf.t
+val set_pdf_info : ?xmp_also:bool -> ?xmp_just_set:bool -> (string * Pdf.pdfobject * int) -> Pdf.t -> Pdf.t
 
 (** [set_pdf_info (key, value, version)] sets the entry [key] in the
 /ViewerPreferences directory, updating the PDF minor version to [version].*)
@@ -195,7 +195,11 @@ val get_metadata : Pdf.t -> Pdfio.bytes option
 (** Print metadate to stdout *)
 val print_metadata : Pdf.t -> unit
 
-val set_metadata_date : Pdf.t -> string -> bool -> Pdf.t
+(** Set the metadata date *)
+val set_metadata_date : Pdf.t -> string -> Pdf.t
+
+(** Create XMP metadata from scratch *)
+val create_metadata : Pdf.t -> Pdf.t
 
 (** {2 Stamping} *)
 

cpdfcommand.ml

@@ -179,6 +179,7 @@ type op =
   | ListSpotColours
   | RemoveClipping
   | SetMetadataDate of string
+  | CreateMetadata
 
 let string_of_op = function
   | CopyFont _ -> "CopyFont"
@@ -291,6 +292,7 @@ let string_of_op = function
   | RemoveTrim -> "RemoveTrim"
   | RemoveBleed -> "RemoveBleed"
   | SetMetadataDate _ -> "SetMetadataDate"
+  | CreateMetadata -> "CreateMetadata"
 
 (* Inputs: filename, pagespec. *)
 type input_kind =
@@ -405,7 +407,6 @@ type args =
    mutable extract_text_font_size : float option;
    mutable padwith : string option;
    mutable alsosetxml : bool;
-   mutable alsosetxmlwhenpresent : bool;
    mutable justsetxml : bool;
    mutable gs_malformed : bool}
 
@@ -495,7 +496,6 @@ let args =
    extract_text_font_size = None;
    padwith = None;
    alsosetxml = false;
-   alsosetxmlwhenpresent = false;
    justsetxml = false;
    gs_malformed = false}
 
@@ -577,7 +577,6 @@ let reset_arguments () =
   args.extract_text_font_size <- None;
   args.padwith <- None;
   args.alsosetxml <- false;
-  args.alsosetxmlwhenpresent <- false;
   args.justsetxml <- false
   (* Do not reset original_filename or cpdflin or was_encrypted or
    * was_decrypted_with_owner or recrypt or producer or creator or
@@ -652,7 +651,7 @@ let banned banlist = function
     AddText _|ScaleContents _|AttachFile _|CopyAnnotations _|SetMetadata _|
     ThinLines _|SetAuthor _|SetTitle _|SetSubject _|SetKeywords _|SetCreate _|
     SetModify _|SetCreator _|SetProducer _|SetVersion _|RemoveDictEntry _ |
-    RemoveClipping | SetMetadataDate _ ->
+    RemoveClipping | SetMetadataDate _ | CreateMetadata ->
       mem Pdfcrypt.NoEdit banlist
 
 let operation_allowed pdf banlist op =
@@ -1591,9 +1590,6 @@ let sethardbox box =
 let setalsosetxml () =
   args.alsosetxml <- true
 
-let setalsosetxmlwhenpresent () =
-  args.alsosetxmlwhenpresent <- true
-
 let setjustsetxml () =
   args.justsetxml <- true
 
@@ -2026,12 +2022,12 @@ and specs =
    ("-also-set-xml",
       Arg.Unit setalsosetxml,
       " Also set XML metadata");
-   ("-also-set-xml-when-present",
-      Arg.Unit setalsosetxmlwhenpresent,
-      " Also set XML metadata, but only if field already present");
    ("-just-set-xml",
       Arg.Unit setjustsetxml,
       " Just set XML metadata, not old-fashioned metadata");
+   ("-create-metadata",
+      Arg.Unit (setop CreateMetadata),
+      " Create XML metadata from scratch.");
    ("-set-page-layout",
       Arg.String setpagelayout,
       " Set page layout upon document opening");
@@ -3334,32 +3330,6 @@ let remove_clipping pdf range =
   in
     Cpdf.process_pages remove_clipping_page pdf range
 
-let change_font_size_ops (r, g, b) dx dy source_size target_size pdf resources content =
-  let ops = Pdfops.parse_operators pdf resources content in
-  let tr = Pdftransform.mktranslate dx dy in
-    let rec process a = function
-      Pdfops.Op_Tf (fontname, size)::t when fabs (size -. source_size) < 0.01 ->
-        process
-          (Pdfops.Op_rg (r, g, b)::Pdfops.Op_Tf (fontname, target_size)::Pdfops.Op_cm tr::a)
-          t
-    | h::t -> process (h::a) t
-    | [] -> rev a
-    in
-      [Pdfops.stream_of_ops (process [] ops)]
-
-let change_font_size pdf range (r, g, b) dx dy source_size target_size =
-  let change_font_size_page _ page =
-    let content' =
-      change_font_size_ops
-        (r, g, b) dx dy source_size target_size pdf
-        page.Pdfpage.resources page.Pdfpage.content
-    in
-      Cpdf.process_xobjects
-        pdf page (change_font_size_ops (r, g, b) dx dy source_size target_size);
-      {page with Pdfpage.content = content'}
-  in
-    Cpdf.process_pages change_font_size_page pdf range
-
 (* Main function *)
 let go () =
   match args.op with
@@ -3751,11 +3721,10 @@ let go () =
             write_pdf false
               (Cpdf.set_pdf_info 
                  ~xmp_also:args.alsosetxml
-                 ~xmp_also_when_present:args.alsosetxmlwhenpresent
                  ~xmp_just_set:args.justsetxml
                  (key, value, version) pdf)
   | Some (SetMetadataDate date) ->
-      write_pdf false (Cpdf.set_metadata_date (get_single_pdf args.op false) date args.alsosetxmlwhenpresent)
+      write_pdf false (Cpdf.set_metadata_date (get_single_pdf args.op false) date)
   | Some ((HideToolbar _ | HideMenubar _ | HideWindowUI _
           | FitWindow _ | CenterWindow _ | DisplayDocTitle _) as op) ->
       begin match args.out with
@@ -4200,6 +4169,9 @@ let go () =
       let pdf = get_single_pdf args.op false in
         let range = parse_pagespec pdf (get_pagespec ()) in
           write_pdf false (remove_clipping pdf range)
+  | Some CreateMetadata ->
+      let pdf = get_single_pdf args.op false in
+        write_pdf false (Cpdf.create_metadata pdf)
 
 let parse_argv () =
   if args.debug then

cpdfmanual.tex

@@ -11,6 +11,11 @@
 %FIXME: Document new -artbox, -trimbox, -bleedbox and -remove-artbox, -remove-trimbox, -remove-bleedbox
 %FIXME: Document -cropbox and -remove-cropbox as synonyms of -crop and -remove-crop
 %FIXME: Document new XMP metadata stuff including setmetadata date and its format
+%FIXME: Document new -gs-malformed flag.
+%FIXME: Document new -create-metadata
+%FIXME: Document -remove-clipping
+%FIXME: Document new -list-spot-colours
+
 \documentclass{book}
 \usepackage{palatino}
 \usepackage{microtype}