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compton-trans: consistency, better bash practices, refactor.

This commit is contained in:
Christopher Jeffrey 2013-05-04 13:18:04 -05:00
parent 85e7d18803
commit 9a4d202f5d
1 changed files with 27 additions and 26 deletions
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51
bin/compton-trans
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@ -37,35 +37,36 @@ while getopts "scn:w:o:" option; do
c)
active=$(xprop -root -notype "_NET_ACTIVE_WINDOW" \
| sed 's/^.*\(0x\S*\).*$/\1/')
wprefix='-id '; window="$active"
wprefix='-id'; window=$active
;;
n) wprefix='-name '; window="$OPTARG" ;;
w) wprefix='-id '; window="$OPTARG" ;;
o) opacity="$OPTARG" ;;
n) wprefix='-name'; window=$OPTARG ;;
w) wprefix='-id'; window=$OPTARG ;;
o) opacity=$OPTARG ;;
\?) exit 1;;
esac
done
# Read positional arguments
shift $(($OPTIND - 1))
[ -n "$1" ] && opacity="$1"
test -n "$1" && opacity=$1
# Validate opacity value
if [ -z "$opacity" ]; then
if test -z "$opacity"; then
echo "No opacity specified."
exit 1
fi
opacity="$(echo "$opacity" \
| sed -rn 's/^[[:space:]]*([+-]?[[:digit:]]+)[[:space:]]*$/\1/p')"
opacity=$(echo "$opacity" \
| sed 's/%//g' \
| sed -rn 's/^[[:space:]]*([+-]?[[:digit:]]+)[[:space:]]*$/\1/p')
if [ -z "$opacity" ]; then
if test -z "$opacity"; then
echo "Invalid opacity value."
exit 1
fi
# Get ID of the target window
if [ -z "$wprefix" ]; then
if test -z "$wprefix"; then
treeout=$(xwininfo -children -frame)
else
treeout=$(xwininfo -children $wprefix "$window")
@ -73,7 +74,7 @@ fi
wid=$(echo "$treeout" | sed -n 's/^xwininfo:.*: \(0x[[:xdigit:]]*\).*$/\1/p')
if [ -z "$wid" ]; then
if test -z "$wid"; then
echo "Failed to find window."
exit 1
fi
@ -86,29 +87,31 @@ fi
# If it's already the topmost window
if echo "$treeout" | grep "Parent window id: 0x[[:xdigit:]]* (the root window)" > /dev/null; then
topmost="$wid"
topmost=$wid
else
# Get the whole window tree
treeout="$(xwininfo -root -tree)"
treeout=$(xwininfo -root -tree)
if [ -z "$treeout" ]; then
if test -z "$treeout"; then
echo "Failed to get root window tree."
exit 1
fi
# Find the line number of the target window in the window tree
lineno="$(echo -n "$treeout" | grep -nw "$wid" | head -n1 | cut -d ':' -f 1)"
lineno=$(echo -n "$treeout" | grep -nw "$wid" | head -n1 | cut -d ':' -f 1)
if [ -z "$lineno" ]; then
if test -z "$lineno"; then
echo "Failed to find window in window tree."
exit 1
fi
# Find the highest ancestor of the target window below
topmost=$(echo -n "$treeout" | head -n $(($lineno + 1)) | sed -n 's/^ \(0x[[:xdigit:]]*\).*/\1/p' | tail -n1)
topmost=$(echo -n "$treeout" \
| head -n $(($lineno + 1)) \
| sed -n 's/^ \(0x[[:xdigit:]]*\).*/\1/p' | tail -n1)
fi
if [ -z "$topmost" ]; then
if test -z "$topmost"; then
echo "Failed to find the highest parent window below root of the" \
"selected window."
exit 1
@ -116,19 +119,17 @@ fi
# Calculate the desired opacity
if echo "$opacity" | grep '^[+-]' > /dev/null; then
sign=$(echo "$opacity" | cut -b1)
cur=$(xprop -id "$topmost" -notype "_NET_WM_WINDOW_OPACITY" \
| sed 's/^.*\b\([0-9]\+\).*$\|^.*$/\1/')
[ -z "$cur" ] && cur=0xffffffff
test -z "$cur" && cur=0xffffffff
cur=$((cur * 100 / 0xffffffff))
opacity="$(echo "$opacity" | sed 's/^[+-]//')"
opacity=$(($cur $sign $opacity))
opacity=$(($cur + $opacity))
fi
[ $opacity -lt 0 ] && opacity=0
[ $opacity -gt 100 ] && opacity=100
test $opacity -lt 0 && opacity=0
test $opacity -gt 100 && opacity=100
# Set opacity
opacity=$(($opacity * 0xffffffff / 100))
opacity=$((opacity * 0xffffffff / 100))
xprop -id "$topmost" -f _NET_WM_WINDOW_OPACITY 32c \
-set _NET_WM_WINDOW_OPACITY "$opacity"