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First fix on -add-text URLs

This commit is contained in:
John Whitington 2022-08-07 15:01:05 +02:00
parent de7e442560
commit 9d2e73ead2
1 changed files with 25 additions and 14 deletions
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37
cpdfaddtext.ml
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@ -169,6 +169,18 @@ let extract_widths chars_and_widths =
_ -> 0)
(ilist 0 255)
(* For finding the height for URL links, we try to find the Cap Height for the
font. For now, this will only work for built-in fonts. We fall back to using
the font size alone if we cannot get the cap height. *)
let cap_height fontname =
try
let font = unopt (Pdftext.standard_font_of_name ("/" ^ fontname)) in
let header, _, _, _ = Pdfstandard14.afm_data font in
let capheight = try extract_num header "CapHeight" with _ -> Pdf.Integer 0 in
Some (match capheight with Pdf.Integer i -> float_of_int i | Pdf.Real r -> r | _ -> 0.)
with
_ -> None
let make_font embed fontname =
let font = unopt (Pdftext.standard_font_of_name ("/" ^ fontname)) in
let header, width_data, _, chars_and_widths = Pdfstandard14.afm_data font in
@ -301,9 +313,6 @@ let get_urls_line line =
loop line;
(implode (rev !outline), rev !urls)
(* Find a coordinate for an annotation given its position in a line of text. Positions 0..(l - 1). *)
(* Return page label at pdf page num, or page number in arabic if no label *)
let pagelabel pdf num =
Pdfpagelabels.pagelabeltext_of_pagenumber
@ -396,7 +405,7 @@ let addtext
(rawwidth *. fontsize) /. 1000.
in
let unique_fontname = Pdf.unique_key "F" fontdict in
let ops, urls, x, y, hoffset, voffset =
let ops, urls, x, y, hoffset, voffset, text =
let text = process_text time text (replace_pairs pdf filename bates batespad num page) in
let text, urls = get_urls_line text in
@ -431,11 +440,11 @@ let addtext
| Some f ->
ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth
unique_fontname unique_extgstatename colour fontsize text,
urls, x, y, hoffset, voffset
urls, x, y, hoffset, voffset, text
| None ->
ops longest_w metrics (x +. shift_x) (y +. shift_y) rotate (hoffset +. joffset) voffset outline linewidth
fontname None colour fontsize text,
urls, x, y, hoffset, voffset
urls, x, y, hoffset, voffset, text
in
let newresources =
match font with
@ -457,17 +466,19 @@ let addtext
("/S", Pdf.Name "/URI")])]
in
let annots =
(* 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
let annot_coord text pos =
let before = take (explode text) pos 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 sx = annot_coord text s in
let ex = annot_coord text e in
let x, y = x -. hoffset, y -. voffset in
let height = fontsize in
let height =
match cap_height fontname with
| Some c -> (c *. fontsize) /. 1000.
| None -> fontsize
in
Pdf.Indirect (Pdf.addobj pdf (annot (x +. sx, y, x +. ex, y +. height) url))) urls
in
let newrest =