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add _p9k_prompt_length

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romkatv 2019-05-27 12:45:01 +02:00
parent bbebf516ab
commit 784dc059cd
1 changed files with 23 additions and 0 deletions
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23
functions/utilities.zsh
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@ -45,6 +45,29 @@ function _p9k_g_expand() {
typeset -g $1=${(g::)${(P)1}}
}
# If we execute `print -P $1`, how many characters will be printed on the last line?
# Assumes that `%{%}` and `%G` don't lie.
#
# _p9k_prompt_length '' => 0
# _p9k_prompt_length 'abc' => 3
# _p9k_prompt_length $'abc\nxy' => 2
# _p9k_prompt_length $'\t' => 8
# _p9k_prompt_length '%F{red}abc' => 3
# _p9k_prompt_length $'%{a\b%Gb%}' => 1
function _p9k_prompt_length() {
emulate -L zsh
local -i x y=$#1 m
if (( y )); then
while (( ${${(%):-$1%$y(l.1.0)}[-1]} )); do (( y *= 2 )); done
local xy
while (( y > x + 1 )); do
m=$(( x + (y - x) / 2 ))
typeset ${${(%):-$1%$m(l.x.y)}[-1]}=$m
done
fi
_P9K_RETVAL=$x
}
typeset -g _P9K_BYTE_SUFFIX=('B' 'K' 'M' 'G' 'T' 'P' 'E' 'Z' 'Y')
# 42 => 42B