From: Martin Mares <mj@ucw.cz>
Date: Tue, 5 Jun 2018 20:57:23 +0000 (+0200)
Subject: ucw-algo: More customizable parameters
X-Git-Tag: v1.99~1^2~18
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=1b2fdb338bf50410001853b35d05f5883bd9b076;p=ucwmac.git

ucw-algo: More customizable parameters
---

diff --git a/ucw-algo.tex b/ucw-algo.tex
index f15d24b..cb65f04 100644
--- a/ucw-algo.tex
+++ b/ucw-algo.tex
@@ -19,7 +19,19 @@
 \localedef{en}{alg:in}{Input}
 \localedef{en}{alg:out}{Output}
 
-% Spacing (customizable)
+% Item indent
+\newdimen\algoindent
+\algoindent=2em
+
+% Extra indent for nested items
+\newdimen\algonestindent
+\algonestindent=2em
+
+% Width of item label
+\newdimen\algolabelwidth
+\algolabelwidth=0.5em
+
+% Set up spacing (customizable)
 \def\algospacing{
 	\itemnarrow=\itemindent
 	\interitemskip=1pt
@@ -27,6 +39,19 @@
 	\postitemizeskip=\dimexpr \bigskipamount - \parskip \relax
 }
 
+% Set up paragraph mode for a single step of the algorithm (customizable)
+\def\algopar{
+	\par
+	\parindent=\algoindent
+	\hangindent=\algoindent
+	\advance\hangindent by \algolabelwidth
+	\hangafter=1
+	\leavevmode
+}
+
+% Typeset step label (customizable)
+\def\algostep#1{\hbox to \algolabelwidth{\hss #1~~}}
+
 \def\algoinit{
 	\goodbreak
 	\begingroup
@@ -45,23 +70,15 @@
 \def\endalgo{\goodbreak\endlist\endgroup}
 \let\endproc=\endalgo
 
-\def\algopar{
-	\par
-	\parindent=2em
-	\hangindent=2.5em	% \parindent + width of box for the step number
-	\hangafter=1
-	\leavevmode
-}
-
 \def\algoitem{%
 	\ifnum\itemcount=0\par\nobreak\smallskip\fi
 	\algopar\advance\itemcount by 1
-	\hbox to 0.5em{\hss \the\itemcount.~~}%
+	\algostep{\the\itemcount.}%
 	\futurelet\next\algoitemh
 }
 
 \def\algoitemh{\ifx\next:\let\next=\algohang\else\let\next=\algoitemgo\fi\next}
-\def\algohang:{\advance\hangindent by 2em \hskip 2em\futurelet\next\algoitemh}
+\def\algohang:{\advance\hangindent by \algonestindent \hskip \algonestindent\futurelet\next\algoitemh}
 \optdef\algoitemgo{\ifx\addid\undefined\else\addid{item}{\the\itemcount}\fi}
 
 \def\algin{\par\nobreak{\it \localestr{alg:in}:\/} }