oh-my-zsh/plugins/zsh-navigation-tools/n-history

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# Copy this file into /usr/share/zsh/site-functions/
# and add 'autoload n-history` to .zshrc
#
# This function allows to browse Z shell's history and use the
# entries
#
# Uses n-list
emulate -L zsh
setopt extendedglob
zmodload zsh/curses
zmodload zsh/parameter
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local IFS="
"
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# Variables to save list's state when switching views
# The views are: history and "most frequent history words"
local one_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
local one_NLIST_CURRENT_IDX
local one_NLIST_IS_SEARCH_MODE
local one_NLIST_SEARCH_BUFFER
local one_NLIST_TEXT_OFFSET
local one_NLIST_IS_UNIQ_MODE
local one_NLIST_IS_F_MODE
local one_NLIST_GREP_STRING
local one_NLIST_NONSELECTABLE_ELEMENTS
local one_NLIST_REMEMBER_STATE
local one_NLIST_ENABLED_EVENTS
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local two_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
local two_NLIST_CURRENT_IDX
local two_NLIST_IS_SEARCH_MODE
local two_NLIST_SEARCH_BUFFER
local two_NLIST_TEXT_OFFSET
local two_NLIST_IS_UNIQ_MODE
local two_NLIST_IS_F_MODE
local two_NLIST_GREP_STRING
local two_NLIST_NONSELECTABLE_ELEMENTS
local two_NLIST_REMEMBER_STATE
local two_NLIST_ENABLED_EVENTS
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local three_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
local three_NLIST_CURRENT_IDX
local three_NLIST_IS_SEARCH_MODE
local three_NLIST_SEARCH_BUFFER
local three_NLIST_TEXT_OFFSET
local three_NLIST_IS_UNIQ_MODE
local three_NLIST_IS_F_MODE
local three_NLIST_GREP_STRING
local three_NLIST_NONSELECTABLE_ELEMENTS
local three_NLIST_REMEMBER_STATE
local three_NLIST_ENABLED_EVENTS
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# history view
integer active_view=0
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# Lists are "0", "1", "2" - 1st, 2nd, 3rd
# Switching is done in cyclic manner
# i.e. 0 -> 1, 1 -> 2, 2 -> 0
_nhistory_switch_lists_states() {
# First argument is current, newly selected list, i.e. $active_view
# This implies that we are switching from previous view
if [ "$1" = "0" ]; then
# Switched to 1st list, save 3rd list's state
three_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
three_NLIST_CURRENT_IDX=$NLIST_CURRENT_IDX
three_NLIST_IS_SEARCH_MODE=$NLIST_IS_SEARCH_MODE
three_NLIST_SEARCH_BUFFER=$NLIST_SEARCH_BUFFER
three_NLIST_TEXT_OFFSET=$NLIST_TEXT_OFFSET
three_NLIST_IS_UNIQ_MODE=$NLIST_IS_UNIQ_MODE
three_NLIST_IS_F_MODE=$NLIST_IS_F_MODE
three_NLIST_GREP_STRING=$NLIST_GREP_STRING
three_NLIST_NONSELECTABLE_ELEMENTS=( ${NLIST_NONSELECTABLE_ELEMENTS[@]} )
three_NLIST_REMEMBER_STATE=$NLIST_REMEMBER_STATE
three_NLIST_ENABLED_EVENTS=( ${NLIST_ENABLED_EVENTS[@]} )
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# ..and restore 1st list's state
NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$one_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
NLIST_CURRENT_IDX=$one_NLIST_CURRENT_IDX
NLIST_IS_SEARCH_MODE=$one_NLIST_IS_SEARCH_MODE
NLIST_SEARCH_BUFFER=$one_NLIST_SEARCH_BUFFER
NLIST_TEXT_OFFSET=$one_NLIST_TEXT_OFFSET
NLIST_IS_UNIQ_MODE=$one_NLIST_IS_UNIQ_MODE
NLIST_IS_F_MODE=$one_NLIST_IS_F_MODE
NLIST_GREP_STRING=$one_NLIST_GREP_STRING
NLIST_NONSELECTABLE_ELEMENTS=( ${one_NLIST_NONSELECTABLE_ELEMENTS[@]} )
NLIST_REMEMBER_STATE=$one_NLIST_REMEMBER_STATE
NLIST_ENABLED_EVENTS=( ${one_NLIST_ENABLED_EVENTS[@]} )
elif [ "$1" = "1" ]; then
# Switched to 2nd list, save 1st list's state
one_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
one_NLIST_CURRENT_IDX=$NLIST_CURRENT_IDX
one_NLIST_IS_SEARCH_MODE=$NLIST_IS_SEARCH_MODE
one_NLIST_SEARCH_BUFFER=$NLIST_SEARCH_BUFFER
one_NLIST_TEXT_OFFSET=$NLIST_TEXT_OFFSET
one_NLIST_IS_UNIQ_MODE=$NLIST_IS_UNIQ_MODE
one_NLIST_IS_F_MODE=$NLIST_IS_F_MODE
one_NLIST_GREP_STRING=$NLIST_GREP_STRING
one_NLIST_NONSELECTABLE_ELEMENTS=( ${NLIST_NONSELECTABLE_ELEMENTS[@]} )
one_NLIST_REMEMBER_STATE=$NLIST_REMEMBER_STATE
one_NLIST_ENABLED_EVENTS=( ${NLIST_ENABLED_EVENTS[@]} )
# ..and restore 2nd list's state
NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$two_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
NLIST_CURRENT_IDX=$two_NLIST_CURRENT_IDX
NLIST_IS_SEARCH_MODE=$two_NLIST_IS_SEARCH_MODE
NLIST_SEARCH_BUFFER=$two_NLIST_SEARCH_BUFFER
NLIST_TEXT_OFFSET=$two_NLIST_TEXT_OFFSET
NLIST_IS_UNIQ_MODE=$two_NLIST_IS_UNIQ_MODE
NLIST_IS_F_MODE=$two_NLIST_IS_F_MODE
NLIST_GREP_STRING=$two_NLIST_GREP_STRING
NLIST_NONSELECTABLE_ELEMENTS=( ${two_NLIST_NONSELECTABLE_ELEMENTS[@]} )
NLIST_REMEMBER_STATE=$two_NLIST_REMEMBER_STATE
NLIST_ENABLED_EVENTS=( ${two_NLIST_ENABLED_EVENTS[@]} )
elif [ "$1" = "2" ]; then
# Switched to 3rd list, save 2nd list's state
two_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
two_NLIST_CURRENT_IDX=$NLIST_CURRENT_IDX
two_NLIST_IS_SEARCH_MODE=$NLIST_IS_SEARCH_MODE
two_NLIST_SEARCH_BUFFER=$NLIST_SEARCH_BUFFER
two_NLIST_TEXT_OFFSET=$NLIST_TEXT_OFFSET
two_NLIST_IS_UNIQ_MODE=$NLIST_IS_UNIQ_MODE
two_NLIST_IS_F_MODE=$NLIST_IS_F_MODE
two_NLIST_GREP_STRING=$NLIST_GREP_STRING
two_NLIST_NONSELECTABLE_ELEMENTS=( ${NLIST_NONSELECTABLE_ELEMENTS[@]} )
two_NLIST_REMEMBER_STATE=$NLIST_REMEMBER_STATE
two_NLIST_ENABLED_EVENTS=( ${NLIST_ENABLED_EVENTS[@]} )
# ..and restore 3rd list's state
NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN=$three_NLIST_FROM_WHAT_IDX_LIST_IS_SHOWN
NLIST_CURRENT_IDX=$three_NLIST_CURRENT_IDX
NLIST_IS_SEARCH_MODE=$three_NLIST_IS_SEARCH_MODE
NLIST_SEARCH_BUFFER=$three_NLIST_SEARCH_BUFFER
NLIST_TEXT_OFFSET=$three_NLIST_TEXT_OFFSET
NLIST_IS_UNIQ_MODE=$three_NLIST_IS_UNIQ_MODE
NLIST_IS_F_MODE=$three_NLIST_IS_F_MODE
NLIST_GREP_STRING=$three_NLIST_GREP_STRING
NLIST_NONSELECTABLE_ELEMENTS=( ${three_NLIST_NONSELECTABLE_ELEMENTS[@]} )
NLIST_REMEMBER_STATE=$three_NLIST_REMEMBER_STATE
NLIST_ENABLED_EVENTS=( ${three_NLIST_ENABLED_EVENTS[@]} )
fi
}
local most_frequent_db="$HOME/.config/znt/mostfrequent.db"
_nhistory_generate_most_frequent() {
local title=$'\x1b[00;31m'"Most frequent history words:"$'\x1b[00;00m\0'
typeset -A uniq
for k in "${historywords[@]}"; do
uniq[$k]=$(( ${uniq[$k]:-0} + 1 ))
done
vk=()
for k v in ${(kv)uniq}; do
vk+="$v"$'\t'"$k"
done
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print -rl -- "$title" "${(On)vk[@]}" > "$most_frequent_db"
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}
# Load configuration
unset NLIST_COLORING_PATTERN
[ -f ~/.config/znt/n-list.conf ] && builtin source ~/.config/znt/n-list.conf
[ -f ~/.config/znt/n-history.conf ] && builtin source ~/.config/znt/n-history.conf
local list
local selected
local private_history_db="$HOME/.config/znt/privhist.db"
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local NLIST_GREP_STRING="$1"
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# 2 is: init once, then remember
local NLIST_REMEMBER_STATE=2
two_NLIST_REMEMBER_STATE=2
three_NLIST_REMEMBER_STATE=2
# Only Private history has EDIT
local -a NLIST_ENABLED_EVENTS
NLIST_ENABLED_EVENTS=( "F1" "HELP" )
two_NLIST_ENABLED_EVENTS=( "F1" "EDIT" "HELP" )
three_NLIST_ENABLED_EVENTS=( "F1" "HELP" )
# All view should attempt to replace new lines with \n
local NLIST_REPLACE_NEWLINES="1"
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two_NLIST_REPLACE_NEWLINES="1"
three_NLIST_REPLACE_NEWLINES="1"
# Only second and third view has non-selectable first entry
local -a NLIST_NONSELECTABLE_ELEMENTS
NLIST_NONSELECTABLE_ELEMENTS=( )
two_NLIST_NONSELECTABLE_ELEMENTS=( 1 )
three_NLIST_NONSELECTABLE_ELEMENTS=( 1 )
while (( 1 )); do
#
# View 1 - history
#
if [ "$active_view" = "0" ]; then
list=( "$history[@]" )
list=( "${(@M)list:#(#i)*$NLIST_GREP_STRING*}" )
if [ "$#list" -eq 0 ]; then
echo "No matching history entries"
return 1
fi
n-list "${list[@]}"
# Selection or quit?
if [[ "$REPLY" = -(#c0,1)[0-9]## && ("$REPLY" -lt 0 || "$REPLY" -gt 0) ]]; then
break
fi
# View change?
if [ "$REPLY" = "F1" ]; then
# Target view: 2
active_view=1
_nhistory_switch_lists_states "1"
elif [ "$REPLY" = "HELP" ]; then
n-help
fi
#
# View 3 - most frequent words in history
#
elif [ "$active_view" = "2" ]; then
local -a dbfile
dbfile=( $most_frequent_db(Nm+1) )
# Compute most frequent history words
if [[ "${#NHISTORY_WORDS}" -eq "0" || "${#dbfile}" -ne "0" ]]; then
# Read the list if it's there
local -a list
list=()
[ -s "$most_frequent_db" ] && list=( ${(f)"$(<$most_frequent_db)"} )
# Will wait for the data?
local message=0
if [[ "${#list}" -eq 0 ]]; then
message=1
_nlist_alternate_screen 1
zcurses init
zcurses delwin info 2>/dev/null
zcurses addwin info "$term_height" "$term_width" 0 0
zcurses bg info white/black
zcurses string info "Computing most frequent history words..."$'\n'
zcurses string info "(This is done once per day, from now on transparently)"$'\n'
zcurses refresh info
sleep 3
fi
# Start periodic list regeneration?
if [[ "${#list}" -eq 0 || "${#dbfile}" -ne "0" ]]; then
# Mark the file with current time, to prevent double
# regeneration (on quick double change of view)
print >> "$most_frequent_db"
(_nhistory_generate_most_frequent &) &> /dev/null
fi
# Ensure we got the list, wait for it if needed
while [[ "${#list}" -eq 0 ]]; do
zcurses string info "."
zcurses refresh info
LANG=C sleep 0.5
[ -s "$most_frequent_db" ] && list=( ${(f)"$(<$most_frequent_db)"} )
done
NHISTORY_WORDS=( "${list[@]}" )
if [ "$message" -eq "1" ]; then
zcurses delwin info 2>/dev/null
zcurses refresh
zcurses end
_nlist_alternate_screen 0
fi
else
# Reuse most frequent history words
local -a list
list=( "${NHISTORY_WORDS[@]}" )
fi
n-list "${list[@]}"
if [ "$REPLY" = "F1" ]; then
# Target view: 1
active_view=0
_nhistory_switch_lists_states "0"
elif [[ "$REPLY" = -(#c0,1)[0-9]## && "$REPLY" -lt 0 ]]; then
break
elif [[ "$REPLY" = -(#c0,1)[0-9]## && "$REPLY" -gt 0 ]]; then
local word="${reply[REPLY]#(#s) #[0-9]##$'\t'}"
one_NLIST_SEARCH_BUFFER="$word"
one_NLIST_SEARCH_BUFFER="${one_NLIST_SEARCH_BUFFER## ##}"
# Target view: 1
active_view=0
_nhistory_switch_lists_states "0"
elif [ "$REPLY" = "HELP" ]; then
n-help
fi
#
# View 2 - private history
#
elif [ "$active_view" = "1" ]; then
if [ -s "$private_history_db" ]; then
local title=$'\x1b[00;32m'"Private history:"$'\x1b[00;00m\0'
() { fc -ap -R "$private_history_db"; list=( "$title" ${history[@]} ) }
else
list=( "Private history - history entries selected via this tool will be put here" )
fi
n-list "${list[@]}"
# Selection or quit?
if [[ "$REPLY" = -(#c0,1)[0-9]## && ("$REPLY" -lt 0 || "$REPLY" -gt 0) ]]; then
break
fi
# View change?
if [ "$REPLY" = "F1" ]; then
# Target view: 3
active_view=2
_nhistory_switch_lists_states "2"
# Edit of the history?
elif [ "$REPLY" = "EDIT" ]; then
"${EDITOR:-vim}" "$private_history_db"
elif [ "$REPLY" = "HELP" ]; then
n-help
fi
fi
done
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if [ "$REPLY" -gt 0 ]; then
selected="$reply[REPLY]"
# ZLE?
if [ "${(t)CURSOR}" = "integer-local-special" ]; then
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zle .redisplay
zle .kill-buffer
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LBUFFER+="$selected"
# Append to private history
local newline=$'\n'
selected="${selected//$newline/\\$newline}"
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[ "$active_view" = "0" ] && print -r -- "$selected" >> "$private_history_db"
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else
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print -zr -- "$selected"
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fi
else
[ "${(t)CURSOR}" = "integer-local-special" ] && zle redisplay
fi
# vim: set filetype=zsh: