wish/wish.sh

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#!/usr/bin/env bash
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function wish_init() {
# Source all plugins
local plugin
local path
for plugin in ${WISH_PLUGINS[@]} ${WISH_RIGHT_PLUGINS[@]}; do
for path in "$XDG_CONFIG_HOME" "/usr/share" "$HOME/.config"; do
source "$path/wish/plugins/$plugin.sh" &> /dev/null && break
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done
[[ $? -ne 0 ]] && echo "Plugin $i not found." >&2
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done
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# Source theme
WISH_THEME=${WISH_THEME:-plain}
while :; do
for theme in "$XDG_CONFIG_HOME" "/usr/share" "$HOME/.config"; do
source "$theme/wish/themes/$WISH_THEME.sh" &> /dev/null && break
done
if [[ $? -eq 0 ]]; then
break
else
echo "Theme $WISH_THEME not found. Using theme plain." >&2
if [[ $WISH_THEME == "plain" ]]; then
break
else
WISH_THEME=plain
fi
fi
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done
# Call plugins to set colors
for plugin in ${WISH_PLUGINS[@]} ${WISH_RIGHT_PLUGINS[@]}; do
eval wish_$(echo $plugin)_set_colors $prev
done
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}
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# Usage: color_to_escape_code [3|4] color
#
# Parameters:
# - [3|4]: Use 3 if escape code is for foreground, 4 for background
# - color: -1 to reset, 0-255 for terminal color codes. 6 digit hexadecimal
# value for true color.
#
# Return value: Prints escape code that sets the fg/bg as requested.
function color_to_escape_code() {
local choice=$1
local color=$2
if [[ $color == -1 ]]; then
echo "\[\033[0;5;0m\]"
else
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if [[ ${#fg_code} -eq 6 ]]; then
local r=$(( 16#${color:0:2} ))
local g=$(( 16#${color:2:2} ))
local b=$(( 16#${color:4:2} ))
echo "\[\033[${choice}8;2;$r;$g;${b}m\]"
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else
echo "\[\033[${choice}8;5;${fg_code}m\]"
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fi
fi
}
# Usage: wish_append bg fg text
#
# Parameters:
# - fg, bg: -1 to reset, 0-255 for terminal color codes. 6 digit hexadecimal
# value for true color.
# - text: Text of the plugin
#
# Return value: None
function wish_append() {
local bg_code=$1
local fg_code=$2
local text=$3
local fg=$(color_to_escape_code 3 $fg_code)
local bg=$(color_to_escape_code 4 $bg_code)
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if [[ $WISH_STATE == 1 ]]; then
WISH_RPL=$((WISH_RPL + ${#text}))
fi
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if [[ $fg_code == -1 ]]; then
case $WISH_STATE in
0)
WISH_LEFT_PS1="$WISH_LEFT_PS1$fg${bg}$text"
;;
1)
WISH_RIGHT_PS1="$WISH_RIGHT_PS1$fg${bg}$text"
;;
esac
else
case $WISH_STATE in
0)
WISH_LEFT_PS1="$WISH_LEFT_PS1$bg$fg$text"
;;
1)
WISH_RIGHT_PS1="$WISH_RIGHT_PS1$bg$fg$text"
;;
esac
fi
}
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function wish_main() {
local prev=$?
# Set local IFS to avoid being affected by shell's IFS
local IFS=$' \n'
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PS1=""
WISH_LEFT_PS1=""
WISH_RIGHT_PS1=""
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local i
# Set newline
if [[ $WISH_AUTONEWLINE != 0 ]]; then
echo -ne "\033[6n" ; read -s -d ';'; read -s -d R WISH_CURSOR_POSITION
if [[ $WISH_CURSOR_POSITION != "1" ]]; then
PS1="\n"
fi
fi
# Generate left prompt.
WISH_STATE=0 # 0 = left prompt, 1 = right prompt
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for i in $(seq 0 $((${#WISH_PLUGINS[@]} - 1))); do
wish_${WISH_PLUGINS[i]}_main $prev
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if [[ -v WISH_POWERLINE ]] && [[ $WISH_POWERLINE != 0 ]]; then
if wish_${WISH_PLUGINS[$i]}_end $prev; then
if [[ $i -lt $((${#WISH_PLUGINS[@]} - 1)) ]]; then
if wish_${WISH_PLUGINS[$(($i + 1))]}_start $prev; then
local plugin=${WISH_PLUGINS[$i]}
local next_plugin=${WISH_PLUGINS[$(($i+1))]}
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local fg_name="WISH_${plugin^^}_BG"
local bg_name="WISH_${next_plugin^^}_BG"
wish_append ${!bg_name} ${!fg_name}
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fi
else
local plugin=${WISH_PLUGINS[$i]}
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local fg_name="WISH_${plugin^^}_BG"
wish_append -1 ${!fg_name}
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fi
fi
fi
done
# Generate Right prompt.
WISH_STATE=1
WISH_RPL=0
for i in $(seq 0 $((${#WISH_RIGHT_PLUGINS[@]} - 1))); do
if [[ -v WISH_POWERLINE ]] && [[ $WISH_POWERLINE != 0 ]]; then
if wish_${WISH_RIGHT_PLUGINS[$i]}_end $prev; then
if [[ $i == 0 ]]; then
local plugin=${WISH_RIGHT_PLUGINS[$i]}
local fg_name="WISH_${plugin^^}_BG"
wish_append -1 ${!fg_name}
elif wish_${WISH_RIGHT_PLUGINS[$(($i - 1))]}_start $prev; then
local plugin=${WISH_RIGHT_PLUGINS[$i]}
local prev_plugin=${WISH_RIGHT_PLUGINS[$(($i-1))]}
local fg_name="WISH_${plugin^^}_BG"
local bg_name="WISH_${prev_plugin^^}_BG"
wish_append ${!bg_name} ${!fg_name}
fi
fi
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fi
wish_${WISH_RIGHT_PLUGINS[$i]}_main $prev
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done
PS1=$PS1"\[\e7\e[$(($COLUMNS - $WISH_RPL + 1))G$WISH_RIGHT_PS1\e8\]$WISH_LEFT_PS1\[\033[0;5;0m\]"
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}
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wish_init
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PROMPT_COMMAND="wish_main; $PROMPT_COMMAND"