diff --git a/cpdftype.ml b/cpdftype.ml index d290966..d4d3d3a 100644 --- a/cpdftype.ml +++ b/cpdftype.ml @@ -6,7 +6,6 @@ by caching so that we are not making a table up for each character! *) (* FIXME We need to reintroduce kerning in Pdfstandard14. *) (* FIXME Fix up charcode / text extractors to take fonts not fontdicts *) - open Pdfutil (* Glue *) @@ -37,42 +36,8 @@ let to_string_elt = function let to_string es = fold_left (fun a b -> a ^ "\n" ^ b) "" (map to_string_elt es) -let indent x = HGlue {glen = x; gstretch = 0.} -let newpara x = VGlue {glen = x; gstretch = 0.} - type t = element list -let of_utf8 (f, fontsize) t = - let pdf = Pdf.empty () in - let fontdict = Pdftext.write_font pdf f in - let extractor = Pdftext.charcode_extractor_of_font pdf (Pdf.Indirect fontdict) in - Pdftext.codepoints_of_utf8 t - |> option_map extractor - |> map char_of_int - |> implode - -let times_roman_12 = (Pdftext.StandardFont (Pdftext.TimesRoman, Pdftext.WinAnsiEncoding), 12.) -let times_italic_10 = (Pdftext.StandardFont (Pdftext.TimesItalic, Pdftext.WinAnsiEncoding), 10.) -let times_bold_10 = (Pdftext.StandardFont (Pdftext.TimesBold, Pdftext.WinAnsiEncoding), 10.) - -let example = - [Font times_roman_12; - newpara 12.; (* set up top of page correctly *) - Text (of_utf8 times_roman_12 "Jackdaws love my Sphinx of Quartz. And this, this is the second sentence to provoke a line-break. We need rather more text than one might think in this diminutive font."); - NewLine; - Text (of_utf8 times_roman_12 "After the newline... "); - newpara (12. *. 1.3); - indent 32.; - Font times_italic_10; - Text (of_utf8 times_italic_10 "The second paragraph"); - NewPage; - newpara 10.; (* set up top of page *) - Font times_bold_10; - BeginDest Pdfdest.NullDestination; - Text (of_utf8 times_bold_10 "A little too bold"); - EndDest - ] - type state = {mutable font : Pdftext.font option; mutable fontsize : float; @@ -159,8 +124,33 @@ let layout lmargin rmargin papersize i = iter layout_element i; rev !o -(* Resolve all hglue stretches, insert NewPage as needed. *) -let paginate tmargin bmargin papersize i = i +(* Paginate, simply line-based. When ypos + lineheight exceeds max_ypos, we insert a page break. *) +let paginate tmargin bmargin papersize i = + let height = Pdfunits.convert 72. (Pdfpaper.unit papersize) Pdfunits.PdfPoint (Pdfpaper.height papersize) in + let o = ref [] in + let s = initial_state () in + s.ypos <- tmargin; + let max_ypos = height -. tmargin -. bmargin in + let rec process = function + | VGlue {glen} as glue -> + s.ypos <- s.ypos +. glen; + o := glue :: !o; + if s.ypos > max_ypos then process NewPage + | NewLine -> + s.ypos <- s.ypos +. s.fontsize *. 1.3; + o := NewLine::!o; + if s.ypos > max_ypos then process NewPage + | Font (f, fs) -> + s.font <- Some f; + s.fontsize <- fs; + o := Font (f, fs)::!o + | NewPage -> + s.ypos <- tmargin; + o := NewPage::!o + | x -> o := x::!o + in + iter process i; + rev !o let make_resources fontobjnums = Pdf.Dictionary @@ -234,6 +224,7 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i = write_page (); thispagefontnums := []; ops := []; + if s.font <> None then typeset_element (Font (unopt s.font, s.fontsize)); s.xpos <- lmargin; s.ypos <- tmargin | BeginDest dest -> @@ -245,12 +236,3 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i = iter typeset_element i; write_page (); rev !pages - -let example_pdf () = - let pdf = Pdf.empty () in - let pages = typeset 20. 20. 20. 20. Pdfpaper.a4 pdf example in - let pdf, pageroot = Pdfpage.add_pagetree pages pdf in - Pdfpage.add_root pageroot [] pdf - -(*let _ = - Pdfwrite.pdf_to_file (example_pdf ()) "out.pdf"*)