From e5074c20a37ce5606c36b7372799633b63d0f99f Mon Sep 17 00:00:00 2001
From: John Whitington <john@coherentgraphics.co.uk>
Date: Tue, 23 Nov 2021 14:20:38 -0800
Subject: [PATCH] more

---
 cpdfcommand.ml | 10 +++++++---
 cpdftype.ml    | 30 ++++++++++++++++++++++++++----
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index 1169817..e7fac2e 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -3,7 +3,7 @@ let demo = false
 let noncomp = false
 let major_version = 2
 let minor_version = 5
-let version_date = "(devel, 15th Nov 2021)"
+let version_date = "(devel, 22nd Nov 2021)"
 
 open Pdfutil
 open Pdfio
@@ -2953,6 +2953,7 @@ let typeset_table_of_contents pdf =
   let marks = Pdfmarks.read_bookmarks pdf in
   if marks = [] then (Printf.eprintf "No bookmarks, not making table of contents\n%!"; pdf) else
   let f = (Pdftext.StandardFont (Pdftext.Courier, Pdftext.WinAnsiEncoding), 10.) in
+  let big = (Pdftext.StandardFont (Pdftext.Courier, Pdftext.WinAnsiEncoding), 20.) in
   let firstpage = hd (Pdfpage.pages_of_pagetree pdf) in
   let firstpage_papersize =
     let width, height =
@@ -2971,10 +2972,13 @@ let typeset_table_of_contents pdf =
           Cpdftype.NewLine])
       (Pdfmarks.read_bookmarks pdf)
   in
-  print_string (Cpdftype.to_string (flatten lines));
   let toc_pages =
     Cpdftype.typeset 50. 50. 50. 50. firstpage_papersize pdf
-      ([Cpdftype.Font f] @ flatten lines)
+      ([Cpdftype.Font big;
+        Cpdftype.Text "Table of Contents";
+        Cpdftype.NewLine;
+        Cpdftype.VGlue {glen = 20.; gstretch = 0.};
+        Cpdftype.Font f] @ flatten lines)
   in
    let original_pages = Pdfpage.pages_of_pagetree pdf in
     let changes =
diff --git a/cpdftype.ml b/cpdftype.ml
index d4d3d3a..3bd6275 100644
--- a/cpdftype.ml
+++ b/cpdftype.ml
@@ -156,6 +156,10 @@ let make_resources fontobjnums =
   Pdf.Dictionary
     [("/Font", Pdf.Dictionary (map (fun fo -> ("/F" ^ string_of_int fo, Pdf.Indirect fo)) fontobjnums))]
 
+let make_annotations annots =
+  if annots = [] then Pdf.Dictionary [] else
+    Pdf.Dictionary ["/Annots", Pdf.Array annots]
+
 (* At this stage, just Font and Text and HGlue 0. and VGlue 0. and Newline and
    NewPage elements. Split on NewPages, typeset each page, add font
    dictionaries. New page only
@@ -176,6 +180,8 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
   let ops = ref [] in
   let fonts = ref [] in
   let thispagefontnums = ref [] in
+  let thispageannotations = ref [] in
+  let thisdestrectangles = ref [] in
   let pages = ref [] in
   let write_page () =
     if !ops <> [] then
@@ -184,7 +190,7 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
          Pdfpage.mediabox = Pdfpage.rectangle_of_paper papersize;
          Pdfpage.resources = make_resources !thispagefontnums;
          Pdfpage.rotate = Pdfpage.Rotate0;
-         Pdfpage.rest = Pdf.Dictionary []}
+         Pdfpage.rest = make_annotations !thispageannotations}
       in
         pages := page :: !pages
   in
@@ -197,8 +203,12 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
           ::Pdfops.Op_BT
           ::Pdfops.Op_cm (Pdftransform.mktranslate s.xpos (height -. s.ypos))
           ::Pdfops.Op_q
-          ::!ops
+          ::!ops;
         (* If a destination, add the rectangle to the pile of rectangles for this annotation. *)
+        if s.dest <> None then
+          thisdestrectangles :=
+            let minx, miny = s.xpos, height -. s.ypos in
+            (minx, miny, minx +. width_of_string s.width_table (explode cps), miny +. s.fontsize)::!thisdestrectangles
     | Font (f, fontsize) ->
         let name, objnum =
           match List.assoc_opt f !fonts with
@@ -209,6 +219,7 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
                 fonts := (f, num) :: !fonts;
                 (n, num)
         in
+          s.width_table <- font_widths f fontsize;
           s.font <- Some f;
           s.fontsize <- fontsize;
           thispagefontnums := objnum :: !thispagefontnums;
@@ -223,6 +234,7 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
     | NewPage ->
         write_page ();
         thispagefontnums := [];
+        thispageannotations := [];
         ops := [];
         if s.font <> None then typeset_element (Font (unopt s.font, s.fontsize));
         s.xpos <- lmargin;
@@ -230,8 +242,18 @@ let typeset lmargin rmargin tmargin bmargin papersize pdf i =
     | BeginDest dest ->
         s.dest <- Some dest
     | EndDest ->
-        (* Collect together the rectangles for this annotation, merge? and output *)
-        s.dest <- None
+        if !thisdestrectangles <> [] && s.dest <> None then
+          let annot (minx, miny, maxx, maxy) =
+            Pdf.Dictionary
+              [("/Type", Pdf.Name "/Annot");
+               ("/Subtype", Pdf.Name "/Link");
+               ("/Border", Pdf.Array [Pdf.Real 0.; Pdf.Real 0.; Pdf.Real 1.]);
+               ("/Rect", Pdf.Array [Pdf.Real minx; Pdf.Real miny; Pdf.Real maxx; Pdf.Real maxy]);
+               ("/Dest", Pdfdest.pdfobject_of_destination (unopt s.dest))]
+          in
+            thispageannotations := map annot !thisdestrectangles @ !thispageannotations;
+        s.dest <- None;
+        thisdestrectangles := []
   in
     iter typeset_element i;
     write_page ();