dotfiles/.zsh/zsh-fzf-tab/lib/-ftb-generate-header

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#!/hint/zsh
typeset -ga _ftb_headers=()
local i tmp group_colors
local -i mlen=0 len=0
if (( $#_ftb_groups == 1 )) && { ! -ftb-zstyle -m single-group "header" }; then
return
fi
# calculate the max column width
for i in $_ftb_groups; do
(( $#i > mlen )) && mlen=$#i
done
mlen+=1
-ftb-zstyle -a group-colors group_colors || group_colors=($_ftb_group_colors)
for (( i=1; i<=$#_ftb_groups; i++ )); do
[[ $_ftb_groups[i] == "__hide__"* ]] && continue
if (( len + $#_ftb_groups[i] > COLUMNS - 5 )); then
_ftb_headers+=$tmp
tmp='' && len=0
fi
if (( len + mlen > COLUMNS - 5 )); then
# the last column doesn't need padding
_ftb_headers+=$tmp$group_colors[i]$_ftb_groups[i]$'\033[00m'
tmp='' && len=0
else
tmp+=$group_colors[i]${(r:$mlen:)_ftb_groups[i]}$'\033[00m'
len+=$mlen
fi
done
(( $#tmp )) && _ftb_headers+=$tmp