Minor update, some new scripts, some updated

sss: save some space, picture compressor
pdfdiff : perform a visual diff on simila pdfs to highlight

pdfdiff

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+
+# pdfdiff : perform a graphical diff on two similar pdf files, and highlight the differences
+# Usage : pdfdiff SOURCE1 SOURCE2 [OUTPUT]
+# 
+# Dependencies: mutool (https://mupdf.com) ; ImageMagikc (imagemagick.org)
+
+tmpdir=$(mktemp -d)
+
+cp "${1}" "${tmpdir}/a.pdf"
+cp "${2}" "${tmpdir}/b.pdf"
+
+cd "${tmpdir}"
+
+n=$(mutool info a.pdf | grep -im1 "Pages: " | cut -d " " -f 2)
+m=$(mutool info b.pdf | grep -im1 "Pages: " | cut -d " " -f 2)
+
+if test "${n}" != "${m}" ; then
+	read -p "Warning: Source PDFs do not have the same number of pages. Continue ? [Y/n]"
+	test "${REPLY}" = "n" || test "${REPLY}" = "N" && exit 0
+	test "${n}" -gt "${m}" && n="${m}"
+fi
+
+mutool draw -F png -A 0 -N -o a-%d.png a.pdf
+mutool draw -F png -A 0 -N -o b-%d.png b.pdf
+
+for i in $(seq 1 "${n}") ; do
+	compare "a-${i}.png" "b-${i}.png" -compose src "diff-${i}.png"
+	montage "a-${i}.png" "diff-${i}.png" "b-${i}.png" -tile 3x1 -geometry +0+0 "out-${i}.png"
+done
+
+convert $(ls -v out*.png) out.pdf
+
+cd -
+mv "${tmpdir}/out.pdf" "${3:-./diff.pdf}"
+
+rm -rf "${tmpdir}"

sss

@@ -1,7 +1,9 @@
 #!/bin/bash
 
+# TODO: Read the doc about optipng for further compression ?
+
 usage="\
-Usage: $0 [-p PREFIX] [-s SUFFIX] [-e EXTENSION] [-g \"GEOMETRY\"] [-q QUALITY] [-v] image1 image2 image3 ...\n
+Usage: $0 [-p PREFIX] [-s SUFFIX] [-e EXTENSION] [-g \"GEOMETRY\"] [-q QUALITY] [-vntP] image1 image2 image3 ...\n
 Use ImageMagick's convert tool to reduce the size of a selection of image files.\n
 \n
   Options:\n
@@ -30,6 +32,7 @@ Use ImageMagick's convert tool to reduce the size of a selection of image files.
 \t\tBest compression, most loss of quality. Default off\n
   -v\t\tMake verbose\n
   -P\t\tPrint progress (for use with zenity --progress)\n
+  -n\t\tNo changes. Simulate only, print the command lines but do not run them.
   -h\t\tPrint this help and exit.\n"
 
 if [[ $# == 0 ]] ; then echo -e $usage ; exit 0 ; fi
@@ -40,10 +43,11 @@ geom="1920x1080>"
 qual="85"
 ext="jpg"
 verbose=false
+nochange=""
 sampling="-sampling-factor 4:2:0"
 median="2x2-1-1"
 
-while getopts p:s:g:q:M:e:xGmhSvPt option ; do
+while getopts p:s:g:q:M:e:xGmhSvPnt option ; do
 	case "${option}"
 		in
 		p) ((nopt+=2)) ; 
@@ -79,6 +83,9 @@ while getopts p:s:g:q:M:e:xGmhSvPt option ; do
 		G) ((nopt+=1)) ; 
 			gaussian=true;
 			;;
+		n) ((nopt+=1)) ; 
+			nochange=true;
+			;;
 		m) ((nopt+=1)) ; 
 			unset median
 			;;
@@ -106,38 +113,37 @@ test $verbose == true && echo -e "Old file \t Old size \t Old res \t New res \t
 
 for f in "${@:$nopt}" ; do
 	
-	test "$verbose" == true && status="$f \t $(ls -lh $f | cut -d " " -f 5) \t $(identify $f | rev | cut -d " " -f 7 | rev) \t " ; size=$(ls -l "$f" | cut -d " " -f 5)
+	test "$verbose" == true && status="$f \t $(ls -lh $f | cut -d " " -f 5) \t $(identify "${f}" | rev | cut -d " " -f 7 | rev) \t " ; size=$(ls -l "${f}" | cut -d " " -f 5)
 	
 	name="$(echo $f | rev | cut -d '.' -f 2- | rev)"
 	ext="${EXT:-$(echo $f | rev | cut -d '.' -f 1 | rev)}"
 	
-	test "$time" && exif -m -t "DateTime" "$f" > /dev/null && name="$(exif -m -t "DateTime" $f | tr ": " ".-")" || echo "$f : no DateTime found in exif data. Using filename instead."
+	if test "$time" ; then
+		tmp="$(exif -m -t "DateTime" "${f}")" && name="$(echo ${tmp} | tr ": " "-_" | head -n 1)" || echo "$f : no DateTime found in exif data. Using filename instead."
+		tmp="$(echo "${f}" | grep -E "([[:digit:]]{4}).?([[:digit:]]{2}).?([[:digit:]]{2}).?([[:digit:]]{2}).?([[:digit:]]{2}).?([[:digit:]]{2})" | sed -e "s/[^0-9]//g" | sed -E "s/([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})/\1-\2-\3_\4-\5-\6/")"
+		test "${tmp}" && name="${tmp}"
+	fi
+	
+	nf="${prefix}${name}${suffix}.${ext}"
 
-	nf="$prefix""$name""$suffix"."$ext"
+	while test -e $nf ; do nf="${prefix}${name}${suffix}"_$(((++i)))."${ext}" ; done
-
-	while test -e $nf ; do nf="$prefix""$name""$suffix"_$(((++i)))."$ext" ; done
 	unset i
 	
-	((insize+=$(ls -l "$f" | cut -d " " -f 5)))
+	((insize+=$(ls -l "${f}" | cut -d " " -f 5)))
 	
-	convert \
+	cmd="convert -auto-orient -define jpeg:dct-method=float $sampling ${median:+-median $median} -interlace Plane ${gaussian:+-gaussian-blur 0.1} -colorspace RGB -resize ${geom} -quality ${qual} ${f} ${nf}"
-		-auto-orient \
+	test "$exif" = true && cmd="$cmd ; exif --remove --no-fixup -o ${nf} ${nf} > /dev/null"
-		-define jpeg:dct-method=float \
+	
-		$sampling \
+	if test "${nochange}" ; then 
-		${median:+\-median $median} \
+		echo "${cmd}"
-		-interlace Plane \
+	else 
-		${gaussian:+-gaussian-blur 0.1} \
+		$cmd
-		-colorspace RGB \
-		-resize "$geom" \
-		-quality "$qual" "$f" "$nf"; 
 
-	test "$exif" = true && exif --remove --no-fixup -o $nf $nf > /dev/null 
+		((outsize+=$(ls -l "${nf}" | cut -d " " -f 5)))
-
+		test "$verbose" == true && echo -e $status"$(identify "$nf" | rev | cut -d " " -f 7 | rev) \t $(ls -lh "$nf" | cut -d " " -f 5) \t "$nf" \t $((100*$(ls -l "$nf" | cut -d " " -f 5)/$size))% "
-	((outsize+=$(ls -l "$nf" | cut -d " " -f 5)))
+	fi
 	
-	test $verbose == true && echo -e $status"$(identify "$nf" | rev | cut -d " " -f 7 | rev) \t $(ls -lh "$nf" | cut -d " " -f 5) \t "$nf" \t $((100*$(ls -l "$nf" | cut -d " " -f 5)/$size))% "
+	test "$progress" && echo "$(((++progress * 100 / $#)))"
-	
-	test $progress && echo $(((++progress * 100 / $#)))
 done
 
 test $verbose == true && echo -e "Average compression : $((100*outsize/insize))%"

xmute

@@ -0,0 +1,4 @@
+#!/bin/bash
+pid=$(xprop | grep -i pid | cut -d "=" -f 2 | tr -dc "0-9")
+index=$(pacmd list-sink-inputs | grep -B30 "application.process.id = \"$pid\"" | grep -m1 "index:" | cut -d ":" -f 2 | tr -dc "0-9")
+pacmd list-sink-inputs | grep -A30 "index: $index" | grep -q "muted: no" && pacmd set-sink-input-mute $index true || pacmd set-sink-input-mute $index false

xpause

@@ -30,13 +30,13 @@ if test -s /tmp/xpause ; then
 			echo "unpaused $pid" 
 			exit 0 
 		else
-			echo "xpause FAILED (kill)"
+			echo "xunpause FAILED (kill -SIGCONT \"$pid\")"
 			exit 1
 		 fi
 	fi
 fi
 
 echo $pid >> /tmp/xpause
-kill -s "SIGSTOP" $pid || ( echo "xpause FAILED (kill)" ; exit 1 )
+kill -s "SIGSTOP" $pid || ( echo "xpause FAILED (kill - SIGSTOP $pid)" ; exit 1 )
 echo "xpaused $pid"
 exit 0