mdw@git.distorted.org.uk Git - distorted-keys/blob - keeper-cards.tex

   1 %%% -*-latex-*-
   2 %%%
   3 %%% Typeset cards for keeper secrets.
   4 %%%
   5 %%% (c) 2012 Mark Wooding
   6 %%%
   7
   8 %%%----- Licensing notice ---------------------------------------------------
   9 %%%
  10 %%% This file is part of the distorted.org.uk key management suite.
  11 %%%
  12 %%% distorted-keys is free software; you can redistribute it and/or modify
  13 %%% it under the terms of the GNU General Public License as published by
  14 %%% the Free Software Foundation; either version 2 of the License, or
  15 %%% (at your option) any later version.
  16 %%%
  17 %%% distorted-keys is distributed in the hope that it will be useful,
  18 %%% but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 %%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 %%% GNU General Public License for more details.
  21 %%%
  22 %%% You should have received a copy of the GNU General Public License
  23 %%% along with distorted-keys; if not, write to the Free Software Foundation,
  24 %%% Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 \documentclass[a4paper, landscape, 12pt]{article}
  27 \usepackage[utf8]{inputenc}
  28 \usepackage[T1]{fontenc}
  29 %%\usepackage[palatino, helvetica, courier, maths = cmr]{mdwfonts}
  30 \usepackage{graphicx}
  31
  32 %% Report errors with enough context that we can debug them.
  33 \errorcontextlines=999
  34
  35 %% Basic layout for the cards.  We use the paragraph filling machinery, but
  36 %% don't actually need most of the trimmings.
  37 \parindent=0pt
  38 \parfillskip=0pt
  39 \pagestyle{empty}
  40
  41 %% Page layout: try to use most of the page.  The document class will already
  42 %% have set up the paper size, but we do the rest here.
  43 \hoffset=-1in \voffset=-1in
  44 \oddsidemargin=20mm
  45 \textwidth=\paperwidth \advance\textwidth by -2\oddsidemargin
  46 \topmargin=20mm
  47 \headheight=0pt \headsep=0pt
  48 \textheight=\paperheight \advance\textheight by -2\topmargin
  49 \AtBeginDocument{\special{papersize=\the\paperwidth,\the\paperheight}}
  50
  51 %% Parameters for the cards and guide rules.
  52 \newdimen\cardwd \cardwd=82mm
  53 \newdimen\cardht \cardht=49mm
  54 \newdimen\guidelen \guidelen=10mm
  55 \newdimen\rulewd \rulewd=0.6pt
  56
  57 %% Typesetting the secret as text.  The macro \snarf TOKEN T0 T1 ... T7
  58 %% gathers T0 T1 ... T7 into a single argument and passes them to TOKEN, as
  59 %% long as T0 is not \relax.  We use this to process the secret text in a
  60 %% continuation-passing style.
  61 \def\snarf#1#2{%
  62   \ifx#2\relax\let\next\empty%
  63   \else\def\next{\snarfdo#1#2}%
  64   \fi%
  65   \next%
  66 }
  67 \def\snarfdo#1#2#3#4#5#6#7#8#9{#1{#2#3#4#5#6#7#8#9}}
  68
  69 %% Print the left and right halves of the line, with a separator.  Use boxes
  70 %% for the lines so that TeX will work out the width of the enclosing vbox
  71 %% for us.  The basic usage is \line TEXT \relax ... \relax, with eight
  72 %% \relax tokens: this is enough to complete both \snarf calls.
  73 \def\line{\snarf\lineleft}
  74 \def\lineleft#1{\hbox\bgroup#1 \snarf\lineright}
  75 \def\lineright#1{#1\egroup\line}
  76
  77 %% Typeset a card containing a secret.  Usage is \card{INDEX}{SECRET}.
  78 \def\card#1#2{%
  79   %%
  80   %% Make sure we're setting a paragraph.
  81   \leavevmode%
  82   %%
  83   %% Initial material: a stretchy space on the left.
  84   \hbox{}\nobreak\hfil%
  85   %%
  86   %% An alignment for the guide markers surrounding the actual card.
  87   \vbox{\halign{&##\cr%
  88     %%
  89     %% Top left guides.
  90     \vrule width \guidelen height \rulewd depth 0pt%
  91     \vrule width \rulewd depth 0pt height \guidelen%
  92     &%
  93     %%
  94     %% Top centre gap.
  95     \hfil%
  96     &%
  97     %%
  98     %% Top right guides.
  99     \vrule width \rulewd depth 0pt height \guidelen%
 100     \vrule width \guidelen height \rulewd depth 0pt%
 101     \cr%
 102     %%
 103     %% Left gap.
 104     &%
 105     %%
 106     %% The actual card.
 107     \vbox to \cardht{%
 108       %%
 109       %% We actually do more or less sensible typesetting.  TeX will set the
 110       %% box width from the hsize, and we should leave a small margin all
 111       %% around.
 112       \parfillskip=0pt plus 1fil%
 113       \leftskip=1em \rightskip=1em%
 114       \hsize=\cardwd%
 115       %%
 116       %% The heading.
 117       \hrule height 0pt \prevdepth = 0pt%
 118       \medskip%
 119       {\large\bfseries\textsf{\keeper} secret #1/\total}%
 120       %%
 121       %% The QR-code and the text of the secret.
 122       \vfil%
 123       $%
 124       \vcenter{\hbox{\includegraphics[scale = 2.4]{#1.eps}}}%
 125       \hfil%
 126       \vcenter{\ttfamily%
 127         \line#2%
 128         \relax\relax\relax\relax\relax\relax\relax\relax%
 129       }%
 130       $%
 131       %%
 132       %% And we're done.
 133       \vfil%
 134     }%
 135     &%
 136     %%
 137     %% Right gap.
 138     \cr%
 139     %%
 140     %% Bottom left guides.
 141     \vrule width \guidelen depth \rulewd height 0pt%
 142     \vrule width \rulewd depth \guidelen height 0pt%
 143     &%
 144     %% Bottom centre gap.
 145     \hfil%
 146     &%
 147     %% Bottom right guides.
 148     \vrule width \rulewd depth \guidelen height 0pt%
 149     \vrule width \guidelen depth \rulewd height 0pt%
 150     \cr%
 151     %%
 152     %% Leave a small vertical space at the bottom to separate lines of cards.
 153     \strut \cr%
 154   }}%
 155   %%
 156   %% End material: a stretchy space to match the one at the start, and then
 157   %% allow a break.
 158   \nobreak\hfil\hbox{}%
 159   \penalty0%
 160 }
 161
 162 %%%----- That's all, folks --------------------------------------------------