Merge pull request #108 from chjj/compton_trans
compton-trans improvements
This commit is contained in:
Richard Grenville
commit
1cb6058732
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@ -7,6 +7,7 @@
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#
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# Usage:
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# $ compton-trans [options] [+|-]opacity
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# By window id
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# $ compton-trans -w "$WINDOWID" 75
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# By name
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@ -18,117 +19,190 @@
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# $ compton-trans -s 75
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# Increment current window 5%
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# $ compton-trans -c +5
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# Delete current window's opacity
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# $ compton-trans -c --delete
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# Reset all windows
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# $ compton-trans --reset
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# "command" is a shell built-in, faster than "which"
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if test -z "$(command -v xprop)" -o -z "$(command -v xwininfo)"; then
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echo "Please install x11-utils/xorg-xprop/xorg-xwininfo." >& 2
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echo 'Please install x11-utils/xorg-xprop/xorg-xwininfo.' >& 2
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exit 1
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fi
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# Variables
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active=
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wprefix=
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window=
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opacity=
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cur=
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i=
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action=
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treeout=
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wid=
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topmost=
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lineno=
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option=
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v=
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# Read options
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while getopts "scn:w:o:" option; do
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case "$option" in
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s) wprefix=''; window='' ;;
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c)
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active=$(xprop -root -notype "_NET_ACTIVE_WINDOW" \
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| sed 's/^.*\(0x\S*\).*$/\1/')
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wprefix='-id '; window="$active"
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;;
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n) wprefix='-name '; window="$OPTARG" ;;
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w) wprefix='-id '; window="$OPTARG" ;;
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o) opacity="$OPTARG" ;;
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\?) exit 1;;
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esac
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# Workaround: replace '-5' with '~5' so as not to confuse getopts.
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for v in "$@"; do
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shift && set -- "$@" "$(echo "$v" | sed 's/^-\([0-9]\+%\?\)$/~\1/')"
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done
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# Read positional arguments
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shift $(($OPTIND - 1))
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[ -n "$1" ] && opacity="$1"
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# This takes into account the fact that getopts stops on
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# any argument it doesn't recongize or errors on. This
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# allows for things like `compton-trans -5` as well
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# as `compton-trans -c +5 -s` (contrived example).
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while test $# -gt 0; do
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# Reset option index
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OPTIND=1
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# Read options
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while getopts 'scrdgn:w:o:-:' option "$@"; do
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if test "$option" = '-'; then
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case "$OPTARG" in
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select | current | reset | delete | get)
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v=''
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;;
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name | window | opacity)
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eval v=\$$OPTIND
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OPTIND=$((OPTIND + 1))
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;;
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name=* | window=* | opacity=*)
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v=$(echo "$OPTARG" | sed 's/^[^=]\+=//')
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;;
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*)
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echo "$0: illegal option $OPTARG" >& 2
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exit 1
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;;
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esac
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option=$(echo "$OPTARG" | cut -c 1)
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OPTARG=$v
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fi
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case "$option" in
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s) wprefix=''; window='' ;;
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c)
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active=$(xprop -root -notype _NET_ACTIVE_WINDOW \
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| sed 's/^.*\(0x\S*\).*$/\1/')
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wprefix='-id'; window=$active
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;;
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r) action='reset' ;;
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d) action='delete' ;;
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g) action='get' ;;
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n) wprefix='-name'; window=$OPTARG ;;
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w) wprefix='-id'; window=$OPTARG ;;
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o) opacity=$OPTARG ;;
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\?) exit 1 ;;
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esac
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done
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# Read positional arguments
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shift $((OPTIND - 1))
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test -n "$1" && opacity=$1 && shift
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done
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# clean up opacity. xargs == a poor man's trim.
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opacity=$(echo "$opacity" | xargs | sed 's/%//g' | sed 's/^~\([0-9]\+\)$/-\1/')
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# Validate opacity value
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if [ -z "$opacity" ]; then
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echo "No opacity specified."
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if test -z "$action" && ! echo "$opacity" | grep -q '^[+-]\?[0-9]\+$'; then
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echo "Invalid opacity specified: $opacity."
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exit 1
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fi
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opacity="$(echo "$opacity" \
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| sed -rn 's/^[[:space:]]*([+-]?[[:digit:]]+)[[:space:]]*$/\1/p')"
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if [ -z "$opacity" ]; then
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echo "Invalid opacity value."
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exit 1
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# Reset opacity for all windows
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if test x"$action" = x'reset'; then
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xwininfo -root -tree \
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| sed -n 's/^ \(0x[[:xdigit:]]*\).*/\1/p' \
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| while IFS=$'\n' read wid; do
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xprop -id "$wid" -remove _NET_WM_WINDOW_OPACITY
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done
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exit 0
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fi
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# Get ID of the target window
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if [ -z "$wprefix" ]; then
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if test -z "$wprefix"; then
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treeout=$(xwininfo -children -frame)
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else
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treeout=$(xwininfo -children $wprefix"$window")
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test "$wprefix" = '-id' \
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&& ! echo "$window" | grep -q '^\(0x\)\?[0-9a-fA-F]\+$' \
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&& echo 'Bad window ID.' && exit 1
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treeout=$(xwininfo -children $wprefix "$window")
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fi
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wid=$(echo "$treeout" | sed -n 's/^xwininfo:.*: \(0x[[:xdigit:]]*\).*$/\1/p')
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if [ -z "$wid" ]; then
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echo "Failed to find window."
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if test -z "$wid"; then
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echo 'Failed to find window.'
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exit 1
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fi
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# Make sure it's not root window
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if echo "$treeout" | fgrep "Parent window id: 0x0" > /dev/null; then
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echo "Cannot set opacity on root window."
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if echo "$treeout" | fgrep -q 'Parent window id: 0x0'; then
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echo 'Cannot set opacity on root window.'
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exit 1
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fi
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# If it's already the topmost window
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if echo "$treeout" | grep "Parent window id: 0x[[:xdigit:]]* (the root window)" > /dev/null; then
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topmost="$wid"
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if echo "$treeout" | grep -q 'Parent window id: 0x[[:xdigit:]]* (the root window)'; then
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topmost=$wid
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else
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# Get the whole window tree
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treeout="$(xwininfo -root -tree)"
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treeout=$(xwininfo -root -tree)
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if [ -z "$treeout" ]; then
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echo "Failed to get root window tree."
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if test -z "$treeout"; then
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echo 'Failed to get root window tree.'
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exit 1
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fi
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# Find the line number of the target window in the window tree
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lineno="$(echo -n "$treeout" | grep -nw "$wid" | head -n1 | cut -d ':' -f 1)"
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lineno=$(echo -n "$treeout" | grep -nw "$wid" | head -n1 | cut -d ':' -f 1)
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if [ -z "$lineno" ]; then
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echo "Failed to find window in window tree."
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if test -z "$lineno"; then
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echo 'Failed to find window in window tree.'
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exit 1
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fi
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# Find the highest ancestor of the target window below
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topmost=$(echo -n "$treeout" | head -n $(($lineno + 1)) | sed -n 's/^ \(0x[[:xdigit:]]*\).*/\1/p' | tail -n1)
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topmost=$(echo -n "$treeout" \
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| head -n $((lineno + 1)) \
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| sed -n 's/^ \(0x[[:xdigit:]]*\).*/\1/p' \
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| tail -n 1)
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fi
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if [ -z "$topmost" ]; then
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echo "Failed to find the highest parent window below root of the" \
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"selected window."
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if test -z "$topmost"; then
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echo 'Failed to find the highest parent window below root of the' \
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'selected window.'
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exit 1
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fi
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# Calculate the desired opacity
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if echo "$opacity" | grep '^[+-]' > /dev/null; then
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sign=$(echo "$opacity" | cut -b1)
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cur=$(xprop -id "$topmost" -notype "_NET_WM_WINDOW_OPACITY" \
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| sed 's/^.*\b\([0-9]\+\).*$\|^.*$/\1/')
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[ -z "$cur" ] && cur=0xffffffff
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cur=$((cur * 100 / 0xffffffff))
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opacity="$(echo "$opacity" | sed 's/^[+-]//')"
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opacity=$(($cur $sign $opacity))
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# Remove the opacity property.
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if test x"$action" = x'delete'; then
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xprop -id "$topmost" -remove _NET_WM_WINDOW_OPACITY
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exit 0
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fi
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[ $opacity -lt 0 ] && opacity=0
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[ $opacity -gt 100 ] && opacity=100
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# Get current opacity.
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cur=$(xprop -id "$topmost" -notype _NET_WM_WINDOW_OPACITY \
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| sed 's/^.*\b\([0-9]\+\).*$\|^.*$/\1/')
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test -z "$cur" && cur=0xffffffff
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cur=$((cur * 100 / 0xffffffff))
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# Output current opacity.
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if test x"$action" = x'get'; then
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echo "$cur"
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exit 0
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fi
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# Calculate the desired opacity
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if echo "$opacity" | grep -q '^[+-]'; then
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opacity=$((cur + opacity))
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fi
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test $opacity -lt 0 && opacity=0
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test $opacity -gt 100 && opacity=100
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# Set opacity
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opacity=$(($opacity * 0xffffffff / 100))
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opacity=$((opacity * 0xffffffff / 100))
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xprop -id "$topmost" -f _NET_WM_WINDOW_OPACITY 32c \
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-set _NET_WM_WINDOW_OPACITY "$opacity"
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