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cpdf-source
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This commit is contained in:
John Whitington 2022-08-06 16:42:28 +02:00
parent 55b7371d07
commit de7e442560
1 changed files with 24 additions and 27 deletions
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49
cpdfaddtext.ml
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@ -270,9 +270,6 @@ let rec process_text time text m =
of ordered (line num, URL, startpos, endpos) data. of ordered (line num, URL, startpos, endpos) data.
This will be used after any other %Specials have been processed, so that the This will be used after any other %Specials have been processed, so that the
positions do not change. *) positions do not change. *)
let testurlline = "text before %URL[click here|https://www.coherentpdf.com/] rest of text "
let testurllinemultiple = testurlline ^ testurlline
let testlines = [testurllinemultiple; testurllinemultiple]
(* text|url]abc -> text, url, abc *) (* text|url]abc -> text, url, abc *)
let extract_url line = let extract_url line =
@ -304,20 +301,8 @@ let get_urls_line line =
loop line; loop line;
(implode (rev !outline), rev !urls) (implode (rev !outline), rev !urls)
(* Find a coordinate for an annotation given its position in a line of text. Positions 0..(l - 1). *)
(* Get all URLs for all lines *)
let get_urls lines =
let urls = ref [] in
let linesout = ref [] in
let linenum = ref 0 in
List.iter
(fun l ->
let lineout, lineurls = get_urls_line l in
linesout := lineout::!linesout;
urls := rev (map (fun (a, b, c) -> (!linenum, a, b, c)) lineurls) @ !urls;
linenum += 1)
lines;
(rev !linesout, rev !urls)
(* Return page label at pdf page num, or page number in arabic if no label *) (* Return page label at pdf page num, or page number in arabic if no label *)
let pagelabel pdf num = let pagelabel pdf num =
@ -377,10 +362,6 @@ let addtext
| None -> Pdf.Dictionary [] | None -> Pdf.Dictionary []
| Some d -> d | Some d -> d
in in
let unique_fontname = Pdf.unique_key "F" fontdict in
let ops, urls =
let text = process_text time text (replace_pairs pdf filename bates batespad num page) in
let text = hd (fst (get_urls [text])) in
let calc_textwidth text = let calc_textwidth text =
match font with match font with
| Some f -> | Some f ->
@ -414,14 +395,19 @@ let addtext
let rawwidth = width_of_text (Pdftext.read_font pdf font) text in let rawwidth = width_of_text (Pdftext.read_font pdf font) text in
(rawwidth *. fontsize) /. 1000. (rawwidth *. fontsize) /. 1000.
in in
let unique_fontname = Pdf.unique_key "F" fontdict in
let ops, urls, x, y, hoffset, voffset =
let text = process_text time text (replace_pairs pdf filename bates batespad num page) in
let text, urls = get_urls_line text in
let expanded_lines = let expanded_lines =
map map
(function text -> (function text ->
process_text time text (replace_pairs pdf filename bates batespad num page)) process_text time text (replace_pairs pdf filename bates batespad num page))
lines lines
in in
let expanded_lines, urls = (* process URLs for justification too *) let expanded_lines = (* process URLs for justification too *)
get_urls expanded_lines map (fun line -> fst (get_urls_line line)) expanded_lines
in in
let textwidth = calc_textwidth text let textwidth = calc_textwidth text
and allwidths = map calc_textwidth expanded_lines in and allwidths = map calc_textwidth expanded_lines in
@ -445,11 +431,11 @@ let addtext
| Some f -> | Some f ->
ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth
unique_fontname unique_extgstatename colour fontsize text, unique_fontname unique_extgstatename colour fontsize text,
urls urls, x, y, hoffset, voffset
| None -> | None ->
ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth
fontname None colour fontsize text, fontname None colour fontsize text,
urls urls, x, y, hoffset, voffset
in in
let newresources = let newresources =
match font with match font with
@ -465,13 +451,24 @@ let addtext
Pdf.Dictionary Pdf.Dictionary
[("/Subtype", Pdf.Name "/Link"); [("/Subtype", Pdf.Name "/Link");
("/Rect", Pdf.Array [Pdf.Real minx; Pdf.Real miny; Pdf.Real maxx; Pdf.Real maxy]); ("/Rect", Pdf.Array [Pdf.Real minx; Pdf.Real miny; Pdf.Real maxx; Pdf.Real maxy]);
("/BS", Pdf.Dictionary [("/W", Pdf.Integer 0)]); ("/BS", Pdf.Dictionary [("/W", Pdf.Integer 1)]);
("/A", Pdf.Dictionary [("/URI", Pdf.String url); ("/A", Pdf.Dictionary [("/URI", Pdf.String url);
("/Type", Pdf.Name "/Action"); ("/Type", Pdf.Name "/Action");
("/S", Pdf.Name "/URI")])] ("/S", Pdf.Name "/URI")])]
in in
let annots = let annots =
map (fun (linenum, url, s, e) -> Pdf.Indirect (Pdf.addobj pdf (annot (0., 0., 100., 100.) url))) urls (* FIXME All kinds of offsets / shifts to add here *)
let annot_coord is_end text pos =
let pos = pos + 1 in
let before = take (explode text) (if is_end then pos else pos - 1) in
calc_textwidth (implode before)
in
map (fun (url, s, e) ->
let sx = annot_coord false text s in
let ex = annot_coord true text e -. sx in
let x, y = x -. hoffset, y -. voffset in
let height = fontsize in
Pdf.Indirect (Pdf.addobj pdf (annot (x +. sx, y, x +. ex, y +. height) url))) urls
in in
let newrest = let newrest =
if annots = [] then page.Pdfpage.rest else if annots = [] then page.Pdfpage.rest else