2019-09-26 12:44:54 +02:00
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open Pdfutil
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let emptypage = Pdfpage.blankpage Pdfpaper.a4
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let error s =
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2023-05-02 17:09:10 +02:00
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raise (Pdf.PDFError s)
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2019-09-26 12:44:54 +02:00
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(* Unit conversions to points. *)
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let mm x = ((x /. 10.) /. 2.54) *. 72.
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let cm x = (x /. 2.54) *. 72.
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let inch x = x *. 72.
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let points_of_papersize p =
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2023-04-11 14:50:17 +02:00
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let u = Pdfpaper.unit p in
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let w = Pdfunits.points (Pdfpaper.width p) u in
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let h = Pdfunits.points (Pdfpaper.height p) u in
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w, h
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2019-09-26 12:44:54 +02:00
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let cropbox pdf page =
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match Pdf.lookup_direct pdf "/CropBox" page.Pdfpage.rest with
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| Some pdfobject -> Pdf.direct pdf pdfobject
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| None -> page.Pdfpage.mediabox
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2022-07-14 15:06:25 +02:00
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let width pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in maxx -. minx
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let height pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in maxy -. miny
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let minx pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in minx
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let miny pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in miny
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let maxx pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in maxx
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let maxy pdf box = let minx, miny, maxx, maxy = Pdf.parse_rectangle pdf box in maxy
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let find_page_width pdf page = width pdf page.Pdfpage.mediabox
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let find_page_height pdf page = height pdf page.Pdfpage.mediabox
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let find_page_crop_width pdf page = width pdf (cropbox pdf page)
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let find_page_crop_height pdf page = height pdf (cropbox pdf page)
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let find_page_minx pdf page = minx pdf page.Pdfpage.mediabox
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let find_page_miny pdf page = miny pdf page.Pdfpage.mediabox
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let find_page_maxx pdf page = maxx pdf page.Pdfpage.mediabox
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let find_page_maxy pdf page = maxy pdf page.Pdfpage.mediabox
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let find_page_crop_minx pdf page = minx pdf (cropbox pdf page)
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let find_page_crop_miny pdf page = miny pdf (cropbox pdf page)
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let find_page_crop_maxx pdf page = maxx pdf (cropbox pdf page)
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let find_page_crop_maxy pdf page = maxy pdf (cropbox pdf page)
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2019-09-26 12:44:54 +02:00
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let find_page_characteristic pdf page = function
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| "PW" -> find_page_width pdf page
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| "PH" -> find_page_height pdf page
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| "CW" -> find_page_crop_width pdf page
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| "CH" -> find_page_crop_height pdf page
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| "PMINX" -> find_page_minx pdf page
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| "PMINY" -> find_page_miny pdf page
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| "PMAXX" -> find_page_maxx pdf page
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| "PMAXY" -> find_page_maxy pdf page
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| "CMINX" -> find_page_crop_minx pdf page
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| "CMINY" -> find_page_crop_miny pdf page
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| "CMAXX" -> find_page_crop_maxx pdf page
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| "CMAXY" -> find_page_crop_maxy pdf page
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| _ -> failwith "find_page_characteristic"
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let make_num pdf page unt num =
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let f =
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match num with
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| Pdfgenlex.LexInt i -> float_of_int i
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| Pdfgenlex.LexReal r -> r
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| Pdfgenlex.LexName
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(( "PW" | "PH" | "CW" | "CH" | "PMINX" | "PMINY" | "PMAXX" | "PMAXY"
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| "CMINX" | "CMINY" | "CMAXX" | "CMAXY") as page_characteristic) ->
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2019-09-26 14:30:22 +02:00
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(*let r =*)
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2019-09-26 12:44:54 +02:00
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find_page_characteristic pdf page page_characteristic
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2019-09-26 14:30:22 +02:00
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(*in
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2019-09-26 12:44:54 +02:00
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Printf.printf "characteristic %s is %f\n" page_characteristic r;
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2019-09-26 14:30:22 +02:00
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r*)
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2019-09-26 12:44:54 +02:00
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| _ -> failwith "make_num"
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in
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match unt with
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| Pdfgenlex.LexName "pt" -> f
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| Pdfgenlex.LexName "cm" -> cm f
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| Pdfgenlex.LexName "mm" -> mm f
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| Pdfgenlex.LexName "in" -> inch f
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| _ -> failwith "make_num"
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let update_last_number pdf page unt op num = function
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[] -> []
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| h::t ->
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let final_num = make_num pdf page unt num in
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let h' =
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match op with
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Pdfgenlex.LexName "add" -> h +. final_num
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| Pdfgenlex.LexName "sub" -> h -. final_num
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| Pdfgenlex.LexName "mul" -> h *. final_num
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| Pdfgenlex.LexName "div" -> h /. final_num
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| _ -> failwith "update_last_number"
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in
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h'::t
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let rec parse_units_again pdf page numbers papersize more =
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let w, h = points_of_papersize papersize in
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parse_units pdf page (h::w::numbers) more
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and parse_units pdf page numbers = function
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| Pdfgenlex.LexName "a10portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a10 more
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| Pdfgenlex.LexName "a9portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a9 more
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| Pdfgenlex.LexName "a8portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a8 more
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| Pdfgenlex.LexName "a7portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a7 more
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| Pdfgenlex.LexName "a6portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a6 more
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| Pdfgenlex.LexName "a5portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a5 more
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| Pdfgenlex.LexName "a4portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a4 more
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| Pdfgenlex.LexName "a3portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a3 more
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| Pdfgenlex.LexName "a2portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a2 more
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| Pdfgenlex.LexName "a1portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a1 more
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| Pdfgenlex.LexName "a0portrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.a0 more
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| Pdfgenlex.LexName "a10landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a10) more
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| Pdfgenlex.LexName "a9landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a9) more
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| Pdfgenlex.LexName "a8landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a8) more
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| Pdfgenlex.LexName "a7landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a7) more
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| Pdfgenlex.LexName "a6landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a6) more
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| Pdfgenlex.LexName "a5landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a5) more
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| Pdfgenlex.LexName "a4landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a4) more
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| Pdfgenlex.LexName "a3landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a3) more
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| Pdfgenlex.LexName "a2landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a2) more
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| Pdfgenlex.LexName "a1landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a1) more
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| Pdfgenlex.LexName "a0landscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.a0) more
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| Pdfgenlex.LexName "uslegalportrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.uslegal more
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| Pdfgenlex.LexName "usletterportrait"::more ->
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parse_units_again pdf page numbers Pdfpaper.usletter more
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| Pdfgenlex.LexName "uslegallandscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.uslegal) more
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| Pdfgenlex.LexName "usletterlandscape"::more ->
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parse_units_again pdf page numbers (Pdfpaper.landscape Pdfpaper.usletter) more
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| Pdfgenlex.LexInt x::Pdfgenlex.LexName "mm"::more ->
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parse_units pdf page ((mm <| float_of_int x)::numbers) more
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| Pdfgenlex.LexReal x::Pdfgenlex.LexName "mm"::more ->
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parse_units pdf page (mm x::numbers) more
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| Pdfgenlex.LexInt x::Pdfgenlex.LexName "cm"::more ->
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parse_units pdf page ((cm <| float_of_int x)::numbers) more
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| Pdfgenlex.LexReal x::Pdfgenlex.LexName "cm"::more ->
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parse_units pdf page (cm x::numbers) more
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| Pdfgenlex.LexInt x::Pdfgenlex.LexName "in"::more ->
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parse_units pdf page ((inch <| float_of_int x)::numbers) more
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| Pdfgenlex.LexReal x::Pdfgenlex.LexName "in"::more ->
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parse_units pdf page (inch x::numbers) more
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| Pdfgenlex.LexInt x::more ->
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parse_units pdf page (float_of_int x::numbers) more
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| Pdfgenlex.LexReal x::more ->
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parse_units pdf page (x::numbers) more
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| Pdfgenlex.LexName "pt"::more ->
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parse_units pdf page numbers more
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| Pdfgenlex.LexName
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(( "PW" | "PH" | "CW" | "CH" | "PMINX" | "PMINY" | "PMAXX" | "PMAXY"
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| "CMINX" | "CMINY" | "CMAXX" | "CMAXY") as page_characteristic)::more ->
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let r =
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find_page_characteristic pdf page page_characteristic
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in
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2019-09-26 14:30:22 +02:00
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(* Printf.printf "characteristic %s is %f\n" page_characteristic r;*)
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2019-09-26 12:44:54 +02:00
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parse_units pdf page (r::numbers) more
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| Pdfgenlex.LexName ("add" | "sub" | "mul" | "div") as op::
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((Pdfgenlex.LexInt _ | Pdfgenlex.LexReal _ | Pdfgenlex.LexName
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( "PW" | "PH" | "CW" | "CH" | "PMINX" | "PMINY" | "PMAXX" | "PMAXY"
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| "CMINX" | "CMINY" | "CMAXX" | "CMAXY")) as num)::
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(Pdfgenlex.LexName ("pt" | "mm" | "cm" | "in") as unt)::more ->
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parse_units pdf page (update_last_number pdf page unt op num numbers) more
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| Pdfgenlex.LexName ("add" | "sub" | "mul" | "div") as op::
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((Pdfgenlex.LexInt _ | Pdfgenlex.LexReal _ | Pdfgenlex.LexName
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( "PW" | "PH" | "CW" | "CH" | "PMINX" | "PMINY" | "PMAXX" | "PMAXY"
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| "CMINX" | "CMINY" | "CMAXX" | "CMAXY")) as num)::more ->
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parse_units pdf page (update_last_number pdf page (Pdfgenlex.LexName "pt") op num numbers) more
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| _ -> rev numbers
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let rec space_units_inner = function
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| [] -> []
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| 'm'::'m'::t -> ' '::'m'::'m'::' '::space_units_inner t
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| 'c'::'m'::t -> ' '::'c'::'m'::' '::space_units_inner t
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| 'i'::'n'::t -> ' '::'i'::'n'::' '::space_units_inner t
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| 'p'::'t'::t -> ' '::'p'::'t'::' '::space_units_inner t
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| h::t -> h::space_units_inner t
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let space_units s =
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implode (space_units_inner (explode s))
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let parse_units_string pdf page s =
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let fs = parse_units pdf page [] (Pdfgenlex.lex_string <| space_units s) in
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(*(List.fold_left (fun x y -> x ^ " " ^ y) "" (List.map string_of_float * fs));*)
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fs
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let parse_rectangle pdf s =
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try
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match parse_units_string pdf emptypage s with
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| [x; y; w; h] -> x, y, w, h
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| _ -> error ("Bad rectangle specification " ^ s)
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with
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2022-01-04 13:52:44 +01:00
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e -> error ("Bad rectangle specification " ^ s ^ " : " ^ Printexc.to_string e)
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2019-09-26 12:44:54 +02:00
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let parse_rectangles pdf s =
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try
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let pages = Pdfpage.pages_of_pagetree pdf in
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let groups = List.map (fun page -> parse_units_string pdf page s) pages in
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List.map
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(function
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| [x; y; w; h] -> (x, y, w, h)
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| _ -> error ("Bad rectangle specification " ^ s))
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groups
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with
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2022-01-04 13:52:44 +01:00
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e -> error ("Bad rectangle specification " ^ s ^ " : " ^ Printexc.to_string e)
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2019-09-26 12:44:54 +02:00
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let parse_coordinate pdf s =
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try
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match parse_units_string pdf emptypage s with
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| [dx; dy] ->
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2019-09-26 14:30:22 +02:00
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(*Printf.printf "result = %f, %f\n" dx dy;*)
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2019-09-26 12:44:54 +02:00
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dx, dy
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| _ -> error ("Bad coordinate specification " ^ s)
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with
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_ -> error ("Bad coordinate specification " ^ s)
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let parse_coordinates pdf s =
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try
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let pages = Pdfpage.pages_of_pagetree pdf in
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let groups = List.map (fun page -> parse_units_string pdf page s) pages in
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List.map
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(function
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| [dx; dy] -> (dx, dy)
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| _ -> error ("Bad coordinate specification " ^ s))
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groups
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with
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_ -> error ("Bad coordinate specification " ^ s)
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let parse_single_number pdf s =
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try
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match parse_units_string pdf emptypage s with
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| [x] -> x
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| _ -> error ("Bad number argument " ^ s)
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with
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|
|
|
_ -> error ("Bad number argument " ^ s)
|
