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Misc: compton-trans: Performance optimization 

Reduce abundant calls to xwininfo in compton-trans further. Helpful for
performance but you can't expect too much from a bash script anyway.
This commit is contained in:
Richard Grenville 2012-11-11 13:02:14 +08:00
parent aaeafbd19d
commit ce7f686f9e
1 changed files with 26 additions and 22 deletions
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48
bin/compton-trans
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@ -24,12 +24,11 @@ fi
window=
opacity=
cur=
active=
i=
while getopts "scn:w:o:" option; do
case "$option" in
s) window="" ;;
s) wprefix=''; window='' ;;
c)
active=$(xprop -root -notype "_NET_ACTIVE_WINDOW" \
| sed 's/^.*\(0x\S*\).*$/\1/')
@ -57,43 +56,48 @@ fi
# Get ID of the target window
if [ -z "$wprefix" ]; then
wid=$(xwininfo | sed -n 's/^xwininfo:.*: \(0x[[:xdigit:]]*\).*$/\1/p')
treeout=$(xwininfo -children -frame)
else
wid=$(xwininfo $wprefix"$window" | sed -n 's/^xwininfo:.*: \(0x[[:xdigit:]]*\).*$/\1/p')
treeout=$(xwininfo -children $wprefix"$window")
fi
wid=$(echo "$treeout" | sed -n 's/^xwininfo:.*: \(0x[[:xdigit:]]*\).*$/\1/p')
if [ -z "$wid" ]; then
echo "Failed to find window."
exit 1
fi
treeout="$(xwininfo -id "$wid" -children)"
# Make sure it's not root window
if echo "$treeout" | fgrep "Parent window id: 0x0" > /dev/null; then
echo "Cannot set opacity on root window."
exit 1
fi
# Get the whole window tree
treeout="$(xwininfo -root -tree)"
# If it's already the topmost window
if echo "$treeout" | grep "Parent window id: 0x[[:xdigit:]]* (the root window)" > /dev/null; then
topmost="$wid"
else
# Get the whole window tree
treeout="$(xwininfo -root -tree)"
if [ -z "$treeout" ]; then
echo "Failed to get root window tree."
exit 1
if [ -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)"
if [ -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)
fi
# Find the line number of the target window in the window tree
lineno="$(echo -n "$treeout" | grep -nw "$wid" | head -n1 | cut -d ':' -f 1)"
if [ -z "$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)
if [ -z "$topmost" ]; then
echo "Failed to find the highest parent window below root of the" \
"selected window."