From 510b99164956740f0f652705956f8f8bdac68027 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Tue, 13 Jun 2017 10:56:07 +0000
Subject: Fix setbg-texample for PDFs with more than 1 page

---
 i3/bin/setbg-texample | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

(limited to 'i3/bin')

diff --git a/i3/bin/setbg-texample b/i3/bin/setbg-texample
index bda60e2..c603bce 100755
--- a/i3/bin/setbg-texample
+++ b/i3/bin/setbg-texample
@@ -24,24 +24,27 @@ let "SCR_HEIGHT -= 2 * $PADDING"
 
 PAGE=$RANDOM; let "PAGE %= 22"; let "PAGE += 1"
 
+echo "TeXample page: http://texample.net/tikz/examples/all/?page=$PAGE"
+
 # Fetch list of texamples
 cd /tmp
 $CURL -o texample.html "http://texample.net/tikz/examples/all/?page=$PAGE"
 if [ $? -ne 0 ]; then fail; fi
 
 EXAMPLES="$(grep '^<dl' texample.html | wc -l)"
-awk -v n=0 "BEGIN{n=int(rand()*$EXAMPLES)+1} /^<dl/{l++} (l==n){print} END{}" texample.html | sponge texample.html
+awk -v n=0 "BEGIN{srand();n=int(rand()*$EXAMPLES)+1} /^<dl/{l++} (l==n){print} END{}" texample.html | sponge texample.html
 
 PDF="$(grep '\/media\/tikz\/examples\/PDF' texample.html | sed "s/.*<a href=\"\([^\"]*\)\">PDF<\/a>.*/\1/")"
 TEX="$(grep '\/media\/tikz\/examples\/TEX' texample.html | grep -v overleaf | sed "s/.*<a href=\"\(.*\)\">TEX<\/a>.*/\1/")"
 
-echo $PDF $TEX
+echo "PDF: $PDF"
+echo "TeX: $TEX"
 
-$CURL "http://texample.net$PDF" | convert -size "x$SCR_HEIGHT" -density 300 - /tmp/bg.png
+$CURL "http://texample.net$PDF" | convert -size "x$SCR_HEIGHT" -density 300 - /tmp/bg-page-%d.png
 $CURL "http://texample.net$TEX" | sed -n '/\\begin{document}/,/\\end{document}/p' | pygmentize -l latex -O font_size=$FONT_SIZE -o /tmp/bg-src.png
 
-montage -geometry "+$PADDING+$PADDING" /tmp/bg-src.png /tmp/bg.png "/tmp/bg-$PAGE.png"
-rm /tmp/bg{,-src}.png
+montage -geometry "+$PADDING+$PADDING" /tmp/bg-src.png /tmp/bg-page-0.png "/tmp/bg-$PAGE.png"
+rm /tmp/bg-{page-*,src}.png
 if [ $? -ne 0 ]; then fail; fi
 
 feh -B white --bg-max "/tmp/bg-$PAGE.png"
-- 
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