dotfiles/config/i3/clipmenud

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2016-12-18 18:25:25 +01:00
#!/bin/bash
hr_msg() {
printf -- '\n--- %s ---\n\n' "$1" >&2
}
debug() {
if (( DEBUG )); then
printf '%s\n' "$@" >&2
fi
}
print_debug_info() {
# DEBUG comes from the environment
if ! (( DEBUG )); then
return
fi
local msg="${1?}"
hr_msg "$msg"
hr_msg Environment
env | LC_ALL=C sort >&2
cgroup_path=/proc/$$/cgroup
if [[ -f $cgroup_path ]]; then
hr_msg cgroup
cat "$cgroup_path" >&2
else
hr_msg 'NO CGROUP'
fi
hr_msg 'Finished debug info'
}
print_debug_info 'Initialising'
cache_dir=$HOME/.clipmenu/
# It's ok that this only applies to the final directory.
# shellcheck disable=SC2174
mkdir -p -m0700 "$cache_dir"
declare -A last_data
declare -A last_filename
while sleep "${CLIPMENUD_SLEEP:-0.5}"; do
print_debug_info 'About to run selection'
for selection in clipboard primary; do
print_debug_info "About to do selection for '$selection'"
if type -p xsel >/dev/null 2>&1; then
debug 'Using xsel'
data=$(xsel --logfile /dev/null -o --"$selection"; printf x)
else
debug 'Using xclip'
data=$(xclip -o -sel "$selection"; printf x)
fi
debug "Data before stripping: $data"
# We add and remove the x so that trailing newlines are not stripped.
# Otherwise, they would be stripped by the very nature of how POSIX
# defines command substitution.
data=${data%x}
debug "Data after stripping: $data"
if [[ $data != *[^[:space:]]* ]]; then
debug "Skipping as clipboard is only blank"
continue
fi
if [[ ${last_data[$selection]} == "$data" ]]; then
debug 'Skipping as last selection is the same as this one'
continue
fi
# If we were in the middle of doing a selection when the previous poll
# ran, then we may have got a partial clip.
possible_partial=${last_data[$selection]}
if [[ $possible_partial && $data == "$possible_partial"* ]]; then
debug "$possible_partial is a possible partial of $data"
debug "Removing ${last_filename[$selection]}"
rm -- "${last_filename[$selection]}"
fi
filename="$cache_dir/$(LC_ALL=C date +%F-%T.%N)"
last_data[$selection]=$data
last_filename[$selection]=$filename
debug "Writing $data to $filename"
printf '%s' "$data" > "$filename"
if ! (( NO_OWN_CLIPBOARD )) && [[ $selection != primary ]]; then
# Take ownership of the clipboard, in case the original application
# is unable to serve the clipboard request (due to being suspended,
# etc).
#
# Primary is excluded from the change of ownership as applications
# sometimes act up if clipboard focus is taken away from them --
# for example, urxvt will unhilight text, which is undesirable.
#
# We can't colocate this with the above copying code because
# https://github.com/cdown/clipmenu/issues/34 requires knowing if
# we would skip first.
if type -p xsel >/dev/null 2>&1; then
xsel --logfile /dev/null -o --"$selection" | xsel -i --"$selection"
else
xclip -o -sel "$selection" | xclip -i -sel "$selection"
fi
fi
if ! (( NO_TRANSFER_CLIPBOARD )) && [[ $selection != primary ]]; then
# Copy every clipboard content into primary clipboard
if type -p xsel >/dev/null 2>&1; then
xsel --logfile /dev/null -o --"$selection" | xsel -i --primary
else
xclip -o -sel "$selection" | xclip -i -sel primary
fi
fi
done
done