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simplify and speed up caching

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pull/22/head
romkatv 6 years ago
parent cc670a558d
commit ab913d8930
1 changed files with 85 additions and 86 deletions
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powerlevel9k.zsh-theme
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@ -104,65 +104,72 @@ fi
# with data.
[ -v POWERLEVEL9K_MAX_CACHE_SIZE ] || typeset -gi POWERLEVEL9K_MAX_CACHE_SIZE=10000
typeset -gH _P9K_RETVAL
typeset -gH _P9K_CACHE_KEY
typeset -gaH _P9K_CACHE_VAL
typeset -gAH _P9K_CACHE=()
# Note: Several performance-critical functions return results to the caller via global
# variable _P9K_RETVAL rather than stdout. This is faster.
# variabls rather than stdout. This is faster.
# Store a key-value pair in the cache.
# Caching allows storing array-to-array associations. It should be used like this:
#
# * $1: Key.
# * $2: Value. Can be empty.
# if ! _p9k_cache_get "$key1" "$key2"; then
# # Compute val1 and val2 and then store them in the cache.
# _p9k_cache_set "$val1" "$val2"
# fi
# # Here ${_P9K_CACHE_VAL[1]} and ${_P9K_CACHE_VAL[2]} are $val1 and $val2 respectively.
#
# Note that an attempt to retrieve the value right away won't succeed. All requested
# cache update get batched and flushed together after a prompt is built.
# Limitations:
#
# * Calling _p9k_cache_set without arguments clears the cache entry. Subsequent calls to
# _p9k_cache_get for the same key will return an error.
# * There must be no intervening _p9k_cache_get calls between the associated _p9k_cache_get
# and _p9k_cache_set.
_p9k_cache_set() {
# Uncomment to see cache misses.
# echo "cache: ${(qq)1} => ${(qq)2}" >&2
_P9K_CACHE[$1]=$2
_P9K_RETVAL=$2
# echo "caching: ${(@0q)_P9K_CACHE_KEY} => (${(q)@})" >&2
_P9K_CACHE[$_P9K_CACHE_KEY]="${(pj:\0:)*}"
_P9K_CACHE_VAL=("$@")
}
# Retrieve a value from the cache.
#
# * $1: Key.
#
# If there is value associated with the specified key, sets _P9K_RETVAL and returns 0.
# Otherwise returns 1.
_p9k_cache_get() {
_P9K_RETVAL=${_P9K_CACHE[$1]-__p9k_empty__}
[[ $_P9K_RETVAL != __p9k_empty__ ]]
_P9K_CACHE_KEY="${(pj:\0:)*}"
_P9K_CACHE_VAL=("${(@0)${_P9K_CACHE[$_P9K_CACHE_KEY]}}")
(( #_P9K_CACHE_VAL ))
}
# Sets _P9K_RETVAL to icon whose name is supplied via $1.
# Sets _P9K_RETVAL to the icon whose name is supplied via $1.
_p9k_get_icon() {
local var_name=POWERLEVEL9K_$1
_P9K_RETVAL=${(g::)${${(P)var_name}-$icons[$1]}}
}
typeset -gaH _p9k_left_join=(1)
typeset -gaH _P9K_LEFT_JOIN=(1)
() {
local i
for ((i = 2; i <= $#POWERLEVEL9K_LEFT_PROMPT_ELEMENTS; ++i)); do
elem=$POWERLEVEL9K_LEFT_PROMPT_ELEMENTS[$i]
local elem=$POWERLEVEL9K_LEFT_PROMPT_ELEMENTS[$i]
if [[ ${elem[-7,-1]} == '_joined' ]]; then
_p9k_left_join+=$_p9k_left_join[((i-1))]
_P9K_LEFT_JOIN+=$_P9K_LEFT_JOIN[((i-1))]
else
_p9k_left_join+=$i
_P9K_LEFT_JOIN+=$i
fi
done
typeset -gaH _p9k_right_join=(1)
typeset -gaH _P9K_RIGHT_JOIN=(1)
for ((i = 2; i <= $#POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS; ++i)); do
elem=$POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS[$i]
local elem=$POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS[$i]
if [[ ${elem[-7,-1]} == '_joined' ]]; then
_p9k_right_join+=$_p9k_right_join[((i-1))]
_P9K_RIGHT_JOIN+=$_P9K_RIGHT_JOIN[((i-1))]
else
_p9k_right_join+=$i
_P9K_RIGHT_JOIN+=$i
fi
done
unset elem
}
_p9k_should_join_left() [[ $_P9K_LAST_SEGMENT_INDEX -ge ${_p9k_left_join[$1]:-$1} ]]
_p9k_should_join_right() [[ $_P9K_LAST_SEGMENT_INDEX -ge ${_p9k_right_join[$1]:-$1} ]]
_p9k_should_join_left() [[ $_P9K_LAST_SEGMENT_INDEX -ge ${_P9K_LEFT_JOIN[$1]:-$1} ]]
_p9k_should_join_right() [[ $_P9K_LAST_SEGMENT_INDEX -ge ${_P9K_RIGHT_JOIN[$1]:-$1} ]]
# Resolves a color to its numerical value, or an empty string. Communicates the result back
# by setting _P9K_RETVAL.
@ -199,8 +206,7 @@ _p9k_foreground() {
set_default POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS " "
left_prompt_segment() {
_p9k_should_join_left $2 && local join=true || local join=false
local cache_key="${(q)0} ${(q)1} ${(q)3} ${(q)4} ${(q)5:+1} ${(q)6} ${(q)_P9K_CURRENT_BG} $join"
if ! _p9k_cache_get $cache_key; then
if ! _p9k_cache_get "$0" "$1" "$3" "$4" "${5:+1}" "$6" "$_P9K_CURRENT_BG" "$join"; then
_p9k_color $3 $1 BACKGROUND
local background_color=$_P9K_RETVAL
@ -250,19 +256,17 @@ left_prompt_segment() {
fi
output+=$foreground
_p9k_cache_set $cache_key "${(qq)output} ${(qq)background_color}"
_p9k_cache_set "$output" "$background_color"
fi
local tuple=("${(@Q)${(z)_P9K_RETVAL}}")
_P9K_PROMPT+="${tuple[1]}${5}${POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS}"
_P9K_PROMPT+="${_P9K_CACHE_VAL[1]}${5}${POWERLEVEL9K_WHITESPACE_BETWEEN_LEFT_SEGMENTS}"
_P9K_LAST_SEGMENT_INDEX=$2
_P9K_CURRENT_BG=$tuple[2]
_P9K_CURRENT_BG=$_P9K_CACHE_VAL[2]
}
# End the left prompt, closes the final segment.
left_prompt_end() {
local cache_key="$0 ${(q)_P9K_CURRENT_BG}"
if ! _p9k_cache_get $cache_key; then
if ! _p9k_cache_get "$0" "$_P9K_CURRENT_BG"; then
local output="%k"
if [[ $_P9K_CURRENT_BG != NONE ]]; then
_p9k_foreground $_P9K_CURRENT_BG
@ -272,9 +276,9 @@ left_prompt_end() {
fi
_p9k_get_icon LEFT_SEGMENT_END_SEPARATOR
output+="%f${_P9K_RETVAL}"
_p9k_cache_set $cache_key $output
_p9k_cache_set "$output"
fi
_P9K_PROMPT+=$_P9K_RETVAL
_P9K_PROMPT+="${_P9K_CACHE_VAL[1]}"
}
# Begin a right prompt segment
@ -290,9 +294,7 @@ left_prompt_end() {
set_default POWERLEVEL9K_WHITESPACE_BETWEEN_RIGHT_SEGMENTS " "
right_prompt_segment() {
_p9k_should_join_right $2 && local join=true || local join=false
local cache_key="${(q)0} ${(q)1} ${(q)3} ${(q)4} ${(q)6} ${(q)_P9K_CURRENT_BG} $join"
if ! _p9k_cache_get $cache_key; then
if ! _p9k_cache_get "$0" "$1" "$3" "$4" "$6" "$_P9K_CURRENT_BG" "$join"; then
_p9k_color $3 $1 BACKGROUND
local background_color=$_P9K_RETVAL
_p9k_background $background_color
@ -345,13 +347,11 @@ right_prompt_segment() {
fi
fi
_p9k_cache_set $cache_key "${(qq)output} ${(qq)background_color} ${(qq)icon}"
_p9k_cache_set "$output" "$background_color" "$icon"
fi
local tuple=("${(@Q)${(z)_P9K_RETVAL}}")
_P9K_PROMPT+="${tuple[1]}${5}${5:+ }${tuple[3]}"
_P9K_CURRENT_BG=$tuple[2]
_P9K_PROMPT+="${_P9K_CACHE_VAL[1]}${5}${5:+ }${_P9K_CACHE_VAL[3]}"
_P9K_CURRENT_BG=$_P9K_CACHE_VAL[2]
_P9K_LAST_SEGMENT_INDEX=$2
}
@ -850,9 +850,9 @@ set_default POWERLEVEL9K_DIR_PATH_HIGHLIGHT_BOLD false
prompt_dir() {
# using $PWD instead of "$(print -P '%~')" to allow use of POWERLEVEL9K_DIR_PATH_ABSOLUTE
local current_path=$PWD # WAS: local current_path="$(print -P '%~')"
local cache_key="$0 $2 ${(q)current_path}"
[[ "${POWERLEVEL9K_DIR_SHOW_WRITABLE}" == true && ! -w "$PWD" ]] && cache_key+=" W";
if ! _p9k_cache_get $cache_key; then
[[ "${POWERLEVEL9K_DIR_SHOW_WRITABLE}" == true && ! -w "$PWD" ]] &&
local -i not_writable=1 || local -i not_writable=0
if ! _p9k_cache_get "$0" "$2" "$current_path" "$not_writable"; then
# check if the user wants to use absolute paths or "~" paths
[[ ${(L)POWERLEVEL9K_DIR_PATH_ABSOLUTE} != "true" ]] && current_path=${current_path/#$HOME/"~"}
# declare all local variables
@ -1011,7 +1011,7 @@ prompt_dir() {
if [[ $state_path == '/etc'* ]]; then
current_state='ETC'
icon='ETC_ICON'
elif [[ "${POWERLEVEL9K_DIR_SHOW_WRITABLE}" == true && ! -w "$PWD" ]]; then
elif (( not_writable )); then
current_state="NOT_WRITABLE"
icon='LOCK_ICON'
elif [[ $state_path == '~' ]]; then
@ -1091,10 +1091,10 @@ prompt_dir() {
current_path=${current_path:s/~/$POWERLEVEL9K_HOME_FOLDER_ABBREVIATION}
fi
_p9k_cache_set $cache_key "$0_$current_state ${(qq)2} blue ${(qq)DEFAULT_COLOR} ${(qq)current_path} ${(qq)icon}"
_p9k_cache_set "$current_state" "$current_path" "$icon"
fi
"$1_prompt_segment" "${(@Q)${(z)_P9K_RETVAL}}"
"$1_prompt_segment" "$0_${_P9K_CACHE_VAL[1]}" "$2" blue "$DEFAULT_COLOR" "${_P9K_CACHE_VAL[2]}" "${_P9K_CACHE_VAL[3]}"
}
################################################################
@ -1439,8 +1439,7 @@ exit_code_or_status() {
}
prompt_status() {
local cache_key="$0 $2 $RETVAL $RETVALS"
if ! _p9k_cache_get $cache_key; then
if ! _p9k_cache_get "$0" "$2" "$RETVAL" "${(@)RETVALS}"; then
local ec_text
local ec_sum
local ec
@ -1470,20 +1469,20 @@ prompt_status() {
if (( ec_sum > 0 )); then
if [[ "$POWERLEVEL9K_STATUS_CROSS" == false && "$POWERLEVEL9K_STATUS_VERBOSE" == true ]]; then
_P9K_RETVAL="$0_ERROR ${(qq)2} red yellow1 ${(qq)ec_text} CARRIAGE_RETURN_ICON"
_P9K_CACHE_VAL=("$0_ERROR" "$2" red yellow1 "$ec_text" CARRIAGE_RETURN_ICON)
else
_P9K_RETVAL="$0_ERROR ${(qq)2} ${(qq)DEFAULT_COLOR} red '' FAIL_ICON"
_P9K_CACHE_VAL=("$0_ERROR" "$2" "$DEFAULT_COLOR" red "" FAIL_ICON)
fi
elif [[ "$POWERLEVEL9K_STATUS_OK" == true ]] && [[ "$POWERLEVEL9K_STATUS_VERBOSE" == true || "$POWERLEVEL9K_STATUS_OK_IN_NON_VERBOSE" == true ]]; then
_P9K_RETVAL="$0_OK ${(qq)2} ${(qq)DEFAULT_COLOR} green '' OK_ICON"
_P9K_CACHE_VAL=("$0_OK" "$2" "$DEFAULT_COLOR" green "" OK_ICON)
else
return
fi
if (( $#RETVALS < 3 )); then
_p9k_cache_set $cache_key $_P9K_RETVAL
_p9k_cache_set "${(@)_P9K_CACHE_VAL}"
fi
fi
"$1_prompt_segment" "${(@Q)${(z)_P9K_RETVAL}}"
"$1_prompt_segment" "${(@)_P9K_CACHE_VAL}"
}
################################################################
@ -1665,18 +1664,19 @@ typeset -fH _p9k_vcs_render() {
fi
[[ $VCS_STATUS_RESULT == ok-* ]] || return 1
local cache_key="$0
${(q)VCS_STATUS_LOCAL_BRANCH}
${(q)VCS_STATUS_REMOTE_BRANCH}
${(q)VCS_STATUS_REMOTE_URL}
${(q)VCS_STATUS_ACTION}
${(q)VCS_STATUS_HAS_STAGED}
${(q)VCS_STATUS_HAS_UNSTAGED}
${(q)VCS_STATUS_HAS_UNTRACKED}
${(q)VCS_STATUS_COMMITS_AHEAD}
${(q)VCS_STATUS_COMMITS_BEHIND}
${(q)VCS_STATUS_STASHES}"
if ! _p9k_cache_get $cache_key; then
local -a cache_key=(
"$VCS_STATUS_LOCAL_BRANCH"
"$VCS_STATUS_REMOTE_BRANCH"
"$VCS_STATUS_REMOTE_URL"
"$VCS_STATUS_ACTION"
"$VCS_STATUS_HAS_STAGED"
"$VCS_STATUS_HAS_UNSTAGED"
"$VCS_STATUS_HAS_UNTRACKED"
"$VCS_STATUS_COMMITS_AHEAD"
"$VCS_STATUS_COMMITS_BEHIND"
"$VCS_STATUS_STASHES"
)
if ! _p9k_cache_get "${(@)cache_key}"; then
local state
if [[ $VCS_STATUS_HAS_STAGED != 0 || $VCS_STATUS_HAS_UNSTAGED != 0 ]]; then
state='modified'
@ -1740,12 +1740,11 @@ typeset -fH _p9k_vcs_render() {
fi
fi
_p9k_cache_set $cache_key "${1}_${(U)state} ${(qq)vcs_states[$state]} ${(qq)vcs_prompt}"
_p9k_cache_set "${1}_${(U)state}" "${vcs_states[$state]}" "$vcs_prompt"
fi
local tuple=("${(@Q)${(z)_P9K_RETVAL}}")
_P9K_LAST_GIT_PROMPT[$VCS_STATUS_WORKDIR]="${tuple[3]}"
"$2_prompt_segment" "${tuple[1]}" $3 "${tuple[2]}" "$DEFAULT_COLOR" "${tuple[3]}"
_P9K_LAST_GIT_PROMPT[$VCS_STATUS_WORKDIR]="${_P9K_CACHE_VAL[3]}"
"$2_prompt_segment" "${_P9K_CACHE_VAL[1]}" $3 "${_P9K_CACHE_VAL[2]}" "$DEFAULT_COLOR" "${_P9K_CACHE_VAL[3]}"
return 0
}

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