fluxion/lib/FormatUtils.sh

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#!/bin/bash
if [ "$FormatUtilsVersion" ]; then return 0; fi
readonly FormatUtilsVersion="1.0"
FormatTabLength=8
FormatValidSpecifiers='%([+-]?([0-9]+|\*)?(\.([0-9]+|\*))?)?[bqdiouxXfeEgGcsnaA]'
# This should be relocated (here temporarily)
tabs -$FormatTabLength # Set tab width to var
# This function strips (some) invisible characters.
# It only strips those needed by fluxion, currently.
# Parameters: $1 - format
function format_strip_invisibles() {
# This function currently only strips the following:
# Color escape sequences, & control characters
FormatStripInvisibles=$(echo "$1" | sed -r 's/\\(e\[([0-9]*;?[0-9]+)m|(t|n))//g')
}
# This function replaces all invisible characters
# with a specifier of their corresponding length.
# Parameters: $1 - format
function format_expand_invisibles() {
FormatExpandInvisibles=$(echo "$1" | sed -r 's/\\(e\[([0-9]*;?[0-9]+)m|n)/%0s/g; s/\\t/%'"$FormatTabLength"'s/g')
}
# This function lists all operators in format.
# Parameters: $1 - format
function format_list_specifiers() {
# Special specifier also included (with length value as '*').
FormatListSpecifiers=($(echo "$1" | grep -oP "$FormatValidSpecifiers"))
}
# This function calculates the dynamic specifier count in format.
# Parameters: $1 - format [$2 - specifier array]
function format_calculate_dynamics_count() {
local __format_calculate_dynamics_count__specifiers=("${!2}")
if [ ! "$2" ]
then format_list_specifiers "$1"
__format_calculate_dynamics_count__specifiers=("${FormatListSpecifiers[@]}")
fi
FormatCalculateDynamicsCount=0
local __format_calculate_dynamics_count__specifier
for __format_calculate_dynamics_count__specifier in "${__format_calculate_dynamics_count__specifiers[@]}"; do
if echo "$__format_calculate_dynamics_count__specifier" | grep '\*' >/dev/null 2>&1
then ((FormatCalculateDynamicsCount++))
fi
done
}
# This function calculates total length of statics in format.
# Statics are all specifiers in format with a fixed size.
# Parameters: $1 - format [$2 - specifier array]
function format_calculate_statics_length() {
local __format_calculate_statics_length__specifiers=("${!2}")
if [ ! "$2" ]; then
echo "format_calculate_statics_length missing \$2"
format_list_specifiers "$1"
__format_calculate_statics_length__specifiers=("${FormatListSpecifiers[@]}")
fi
FormatCalculateStaticsLength=$(echo "${__format_calculate_statics_length__specifiers[@]}" | sed -r 's/\.[0-9]+s/s/g' | grep -oP '\d+' | awk 'BEGIN {s=0} {s+=$0} END {print s}')
}
# This function calculates total length of literals in format.
# Literals are all characters in format printed literally.
# Parameters: $1 - format [$2 - processed format [$3 - specifier array]]
function format_calculate_literals_length() {
local __format_calculate_literals_length__normalizedFormat="`echo "$2" | sed -r 's/%%|\*\*/X/g'`"
local __format_calculate_literals_length__specifiers=("${!3}")
if [ ! "$2" ]; then
echo "format_calculate_literals_length missing \$2"
format_strip_invisibles "$1"
__format_calculate_literals_length__normalizedFormat="`echo "$FormatStripInvisibles" | sed -r 's/%%|\*\*/X/g'`"
fi
if [ ! "$3" ]; then
echo "format_calculate_literals_length missing \$3"
format_list_specifiers "$1"
__format_calculate_literals_length__specifiers=("${FormatListSpecifiers[@]}")
fi
FormatCalculateLiteralsLength=$((${#__format_calculate_literals_length__normalizedFormat} - ($(echo "${__format_calculate_literals_length__specifiers[@]}" | wc -m) - ${#__format_calculate_literals_length__specifiers[@]})))
}
# This function calculates the total length of statics & literals in format.
# Parameters: $1 - format [$2 - statics length [$3 - literals length]]
function format_calculate_length() {
local __format_calculate_length__staticsLength=$2
local __format_calculate_length__literalsLength=$3
if [ ! "$2" ]; then
#echo "format_calculate_length missing \$2"
format_expand_invisibles "$1"
format_list_specifiers "$FormatExpandInvisibles"
format_calculate_statics_length X FormatListSpecifiers[@]
__format_calculate_length__staticsLength=$FormatCalculateStaticsLength
fi
if [ ! "$3" ]; then
if [ "$2" ]; then
format_expand_invisibles "$1"
format_list_specifiers "$FormatExpandInvisibles"
fi
#echo "format_calculate_length missing \$3"
format_calculate_literals_length X "$FormatExpandInvisibles" FormatListSpecifiers[@]
__format_calculate_length__literalsLength=$FormatCalculateLiteralsLength
fi
FormatCalculateLength=$(( __format_calculate_length__staticsLength + __format_calculate_length__literalsLength ))
}
# This function calculates total length of dynamics in format.
# Dynamics are all asterisk-containing specifiers in format.
# Parameters: $1 - format [$2 - format length ]
function format_calculate_dynamics_length() {
local __format_calculate_dynamics_length__formatLength=$2
if [ ! "$2" ]; then
echo "format_calculate_dynamics_length missing \$2"
format_calculate_length "$1"
__format_calculate_dynamics_length__formatLength=$FormatCalculateLength
fi
FormatCalculateDynamicsLength=$(( $(tput cols) - $__format_calculate_dynamics_length__formatLength ))
}
# This function calculates the size of individual dynamics in format.
# Parameters: $1 - format [$2 - dynamics length [$3 - dynamics count]]
function format_calculate_autosize_length() {
local __format_calculate_autosize_length__dynamicsLength=$2
local __format_calculate_autosize_length__dynamicsCount=$3
if [ ! "$2" ]; then
format_expand_invisibles "$1"
format_list_specifiers "$FormatExpandInvisibles"
format_calculate_statics_length X FormatListSpecifiers[@]
format_calculate_literals_length X "$FormatExpandInvisibles" FormatListSpecifiers[@]
format_calculate_length X "$FormatCalculateStaticsLength" "$FormatCalculateLiteralsLength"
format_calculate_dynamics_length X "$FormatCalculateLength"
__format_calculate_autosize_length__dynamicsLength=$FormatCalculateDynamicsLength
fi
if [ ! "$3" ]; then
if [ "$2" ]
then format_list_specifiers "$1"
fi
format_calculate_dynamics_count X FormatListSpecifiers[@]
__format_calculate_autosize_length__dynamicsCount=$FormatCalculateDynamicsCount
fi
if [ $__format_calculate_autosize_length__dynamicsCount -ne 0 -a \
$__format_calculate_autosize_length__dynamicsLength -ge 0 ]
then FormatCalculateAutosizeLength=$(( __format_calculate_autosize_length__dynamicsLength / __format_calculate_autosize_length__dynamicsCount ))
else FormatCalculateAutosizeLength=0
fi
}
# This function replaces dynamics' asterisks with their length, in format.
# Parameters: $1 - format [$2 - dynamics length [$3 - dynamics count]]
# Note that this does not yet support multiple lines (multiple \n).
function format_apply_autosize() {
format_calculate_autosize_length "${@}" # Pass all arguments on.
FormatApplyAutosize=$(echo "$1" | sed -r 's/\*\.\*/'"$FormatCalculateAutosizeLength"'.'"$FormatCalculateAutosizeLength"'/g; s/(^|[^*])\*([^*]|$)/\1'"$FormatCalculateAutosizeLength"'\2/g; s/\*\*/*/g')
}
# This function centers literal text.
# Parameters: $1 - literals
function format_center_literals() {
format_strip_invisibles "$1"
local __format_center_literals__text_length=${#FormatStripInvisibles}
format_apply_autosize "%*s%${__format_center_literals__text_length}s%*s"
FormatCenterLiterals=$(printf "$FormatApplyAutosize" "" "$1" "")
}
# This function centers statics in format.
# Parameters: $1 - format
function format_center_dynamic() {
format_calculate_length "$1"
format_calculate_dynamics_length X $FormatCalculateLength
format_apply_autosize "%*s%${FormatCalculateLength}s%*s" $FormatCalculateDynamicsLength 2
# Temporary, I'll find a better solution later (too tired).
FormatCenterDynamic=$(printf "`echo "$FormatApplyAutosize" | sed -r 's/%[0-9]+s/%s/2'`" "" "$1" "")
}