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Workaround the cursor placement bug #51

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Workaround the cursor placement bug #51

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b70f046
Work around sixel cursor placement bug
hackerb9 Sep 18, 2021
32fbde6
Remove erroneous graphics newline from montage
hackerb9 Sep 18, 2021
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23 changes: 21 additions & 2 deletions lsix
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Original file line number Diff line number Diff line change
Expand Up @@ -120,6 +120,18 @@ autodetect() {
# SIXEL SCROLLING (~DECSDM) is now presumed to be enabled.
# See https://github.com/hackerb9/lsix/issues/41 for details.

# SIXEL CURSOR PLACEMENT BUG WORKAROUND
case "$TERM" in
vt340*|contour*)
# These terminals are correct.
sixelcursorbug=""
;;
xterm*|mlterm|yaft*|*)
# These terminals have not yet been fixed. Use -n for echo.
sixelcursorbug="-n"
;;
esac

# TERMINAL COLOR AUTODETECTION.
# Find out how many color registers the terminal has
IFS=";" read -a REPLY -s -t ${timeout} -d "S" -p $'\e[?1;1;0S' >&2
Expand Down Expand Up @@ -241,8 +253,15 @@ main() {
onerow[len++]="file://$1"
shift
done
montage "${onerow[@]}" $imoptions gif:- \
| convert - -colors $numcolors sixel:-
output=$(montage "${onerow[@]}" $imoptions gif:- \
| convert - -colors $numcolors sixel:-)

# Workaround bug in ImageMagick that erroneously sends a
# graphics newline (-) before the end of the image (Esc backslash).
output=${output%-??}$'\e\\'

# Go to next line, unless terminal is quirky.
echo $sixelcursorbug "$output"
done
}

Expand Down