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bash/PROMPT_DIRTRIM: complete rewrite

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Complete rewrite of the _lp_get_dirtrim into _lp_set_dirtrim with a much
faster implementation that avoids char by char processing of $PWD.
Also use (( )) builtin.
This commit is contained in:
Olivier Mengué 2013-12-16 22:30:54 +01:00
parent f38be781bc
commit 81c93c1d52
1 changed files with 19 additions and 17 deletions
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36
liquidprompt
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@ -32,7 +32,7 @@
# David Loureiro <david.loureiro@sysfera.com> # Small portability fix
# Étienne Deparis <etienne@depar.is> # Fossil support
# Florian Le Frioux <florian@lefrioux.fr> # Use ± mark when root in VCS dir.
# François Schmidts <francois.schmidts@gmail.com> # Small code fix, _lp_get_dirtrim
# François Schmidts <francois.schmidts@gmail.com> # Initial PROMPT_DIRTRIM support
# Frédéric Lepied <flepied@gmail.com> # Python virtual env
# Jonas Bengtsson <jonas.b@gmail.com> # Git remotes fix
# Joris Dedieu <joris@pontiac3.nfrance.com> # Portability framework, FreeBSD support, bugfixes.
@ -605,26 +605,27 @@ _lp_shorten_path()
# of the displayed path (if "\w" is present in the PS1 var).
# liquidprompt can calculate this number under two condition, path shortening
# must be activated and PROMPT_DIRTRIM must be already set.
_lp_get_dirtrim() {
[[ "$LP_ENABLE_SHORTEN_PATH" != 1 ]] && echo $PROMPT_DIRTRIM && return
_lp_set_dirtrim() {
local p="${PWD/$HOME/~}"
local len=${#p}
local max_len=$((${COLUMNS:-80}*$LP_PATH_LENGTH/100))
local PROMPT_DIRTRIM=0
local -i max_len=${COLUMNS:-80}*$LP_PATH_LENGTH/100
local -i dt=0
if [[ "$((len))" -gt "$((max_len))" ]]; then
local i
for ((i=$len;i>=0;i--))
if (( ${#p} > max_len )); then
local q="/${p##*/}"
local show="$q"
# +3 because of the ellipsis: "..."
while (( ${#show}+3 < max_len ))
do
[[ $(($len-$i)) -gt $max_len ]] && break
[[ "${p:i:1}" == "/" ]] && PROMPT_DIRTRIM=$((PROMPT_DIRTRIM+1))
(( dt++ ))
p="${p%$q}"
q="/${p##*/}"
show="$q$show"
done
[[ "$((PROMPT_DIRTRIM))" -eq 0 ]] && PROMPT_DIRTRIM=1
(( dt == 0 )) && dt=1
fi
unset p
echo "$PROMPT_DIRTRIM"
PROMPT_DIRTRIM=$dt
# For debugging
# echo $PROMPT_DIRTRIM
}
# Display a ":"
@ -1635,7 +1636,8 @@ _lp_set_prompt()
# LP_HOST is a global set at load time
LP_PERM="$(_lp_permissions_color)"
LP_PWD="$(_lp_shorten_path)"
[[ -n "$PROMPT_DIRTRIM" ]] && PROMPT_DIRTRIM="$(_lp_get_dirtrim)"
# Check that both LP_ENABLE_SHORTEN and PROMPT_DIRTRIM are set
[[ "_$LP_ENABLE_SHORTEN_PATH/$PROMPT_DIRTRIM" = _1/?* ]] && _lp_set_dirtrim
if _lp_are_vcs_enabled; then
LP_VCS="$(_lp_git_branch_color)"