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Add JSON annotations function for cpdflib

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John Whitington 2022-01-16 16:30:36 +00:00
parent 4d87a90bdf
commit 844b58f78b
2 changed files with 10 additions and 0 deletions
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7
cpdfannot.ml
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@ -94,6 +94,13 @@ let get_annotations encoding pdf =
pages
(ilist 1 (length pages)))
let get_annotations_json pdf =
let module J = Cpdfyojson.Safe in
let pages = Pdfpage.pages_of_pagetree pdf in
let pagenums = indx pages in
let json = `List (flatten (map2 (annotations_json_page pdf) pages pagenums)) in
Pdfio.bytes_of_string (J.to_string json)
(* Equalise the page lengths of two PDFs by chopping or extending the first one.
*)
let equalise_lengths a b =

3
cpdfannot.mli
View File

@ -6,6 +6,9 @@ val list_annotations : json:bool -> Cpdfmetadata.encoding -> Pdf.t -> unit
(** Return the annotations as a (pagenumber, content) list *)
val get_annotations : Cpdfmetadata.encoding -> Pdf.t -> (int * string) list
(** Get annotations as JSON *)
val get_annotations_json : Pdf.t -> Pdfio.bytes
(** Copy the annotations on a given set of pages from a to b. b is returned. *)
val copy_annotations : int list -> Pdf.t -> Pdf.t -> Pdf.t