🚀 go-pugleaf

This short text describes how to create texbook.pdf that supports the
interactive PDF features we got used to. Like:

- correct page size
- no corner rules
- correct page numbers (roman and arabic)
- chapter bookmarks and hyperlinks for table of contents
- hyperlinks for index
- hyperlinks for exercises and answers

How to do it:

1) Get texbook.tex from CTAN (systems/knuth/dist/tex/texbook.tex)
2) Save patch below as texbook.patch
3) Run this (second line is to add index hyperlinks):

patch <texbook.patch
sed -i '/le space)/,/^\\<2/s/\([+@ -]\)\([0-9][0-9]*\)\([.,;-]\)/\1\&\2>\3/g' texbook.tex
pdftex texbook

4) Have fun with your new TeXbook ebook!

--- texbook.tex.orig	2009-01-01 00:00:00.000000000 +0000
+++ texbook.tex	2009-01-01 00:00:00.000000000 +0000
@@ -6,5 +6,34 @@
 % from the copyright holder and also from the publisher (Addison-Wesley).
-\loop\iftrue
-  \errmessage{This manual is copyrighted and should not be TeXed}\repeat
-\pausing1 \input manmac
+\input manmac
+\proofmodefalse
+\def\setcornerrules{}
+{\dimen0=\hsize\advance\dimen0 by 2in\global\pdfpagewidth=\dimen0
+\dimen0=\vsize\advance\dimen0 by 2in\global\pdfpageheight=\dimen0}
+\pdfcatalog {/PageLabels<</Nums[
+	0 <</St 1983 /P (Title)>>
+	1 <</St 1 /S/r>>
+	11 <</St 1 /S/D>>
+]>>}
+\def\pdfdestx#1{\hbox to 0pt{\vbox to 0pt{\vss\vbox to 1cm{\pdfdest
+  name {#1} xyz\vss}}}}
+\def\pdflinkinternal#1#2{\pdfstartlink attr {/C [1 0 0] /Border [0 0 1]}
+  goto #1 #2\pdfendlink}
+\def\pdflinkp#1#2{{\count0=#1\advance\count0 by 11\pdflinkinternal{page
+  \the\count0 {/Fit}}{#2}}}
+\def\pdflinkx#1#2{\pdflinkinternal{name {#1}}{#2}}
+\def\pdfoutlinex#1#2{{\def\TeX{TeX}\def\hskip 1pt{}\count0=#1\advance\count0 by 11
+    \pdfoutline goto page \the\count0 {/Fit} count 0 {#2}}}
+
+\def\ansno#1.#2:{\medbreak\noindent
+  \hbox to\parindent{\bf\hss\pdflinkx{ex-#1-#2}{#1.#2}%
+  \pdfdestx{ans-#1-#2}.\enspace}\ignorespaces}
+\outer\def\exercise{\medbreak
+  \global\advance\exno by 1
+  \noindent\llap{\manual\char'170\rm\kern.15em}% triangle in margin
+  {\ninebf EXERCISE \bf\pdflinkx{ans-\chapno-\the\exno}
+  {\chapno.\the\exno}\pdfdestx{ex-\chapno-\the\exno}}\par\nobreak\noindent}
+\def\dexercise{\global\advance\exno by 1
+  \llap{\manual\char'170\rm\kern.15em}% triangle in indented space
+  {\eightbf EXERCISE \bf\pdflinkx{ans-\chapno-\the\exno}
+  {\chapno.\the\exno}\pdfdestx{ex-\chapno-\the\exno}}\hfil\break}
 \ifproofmode\message{Proof mode is on!}\pausing1\fi
@@ -300,3 +329,4 @@
     \hbox to\parindent{\bf\hbox to 1em{\hss#1}\hss}%
-    \rm#2\diamondleaders\hfil\hbox to 2em{\hss#3}}}
+    \rm#2\diamondleaders\hfil\hbox to 2em{\hss%
+    \pdfoutlinex{#3}{#1: #2}\pdflinkp{#3}{#3}}}}
 \\1. The Name of the Game. 1.
@@ -15618,3 +15648,3 @@
 and each of the two long diagonals.
-Can you do the same with twenty pennies?
+\noindent\pdflinkx{ans-22-$\infty $}{Can you do the same with twenty pennies?}\pdfdestx{ex-22-$\infty $}
 \author HENRY ERNEST ^{DUDENEY}, {\sl The Best Coin Problems\/} (1909)
@@ -25751,2 +25781,3 @@
 \catcode`\@=\active \let@=\eightit
+\catcode`&=\active \def&#1>{\pdflinkp{#1}{#1}}
 \parindent=0pt