zsh: prompt: complete internal redesign + improvements
The prompt now no longer requires "setopt promptsubst" and even has
a bit more functionality:
- show exitcode if not equal zero
- underlined hostname if remote-connected via ssh
- extra prompt symbol for root and different color username
- improved battery status (color + charge detection)
Furthermore time and username@hostname have been swapped.
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2 changed files with 116 additions and 59 deletions
161
zsh/prompt.zsh
161
zsh/prompt.zsh
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@ -1,70 +1,131 @@
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function precmd {
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# ===== setopts and misc
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# only show RPROMPT on the current prompt
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setopt transient_rprompt # only show the rprompt on the current prompt
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local TERMWIDTH
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(( TERMWIDTH = ${COLUMNS} - 1 ))
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# set RPROMPT_INDENT to zero in order to remove the useless space on the bottom
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# right of the prompt.
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ZLE_RPROMPT_INDENT=0
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###
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# Truncate the path if it's too long.
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# ===== set the prompt
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zshrc_prompt_precmd() {
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PR_FILLBAR=""
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PR_PWDLEN=""
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# regex to remove all zerospace elements. Used to calculate the width of
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# the top prompt.
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local zero='%([BSUBfksu]|([FB]|){*})'
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local promptsize=${#${(%):---(%n@%m)---()--}}
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local pwdsize=${#${(%):-%~}}
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# linedrawing characters
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local top_left_corner="╭"
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local top_right_corner="╮"
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local bottom_left_corner="╰"
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local bottom_right_corner="╯"
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local dash="─"
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if [[ "$promptsize + $pwdsize" -gt $TERMWIDTH ]]; then
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((PR_PWDLEN=$TERMWIDTH - $promptsize))
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# check $TERM and use non unicode symbols if necessary
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if [[ $TERM == "linux" ]]; then
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top_left_corner="+"
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top_right_corner="+"
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bottom_left_corner="+"
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bottom_right_corner="+"
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dash="-"
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fi
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# commonly used design elements
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local bracket_open="%F{blue}${dash}(%f"
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local bracket_close="%F{blue}%)${dash}%f"
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local separator="%F{cyan}${dash}%f"
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# current directory, truncated if necessary (WIDTH is replaced later)
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local directory="%F{magenta}%WIDTH<..<%~%<<%f"
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# current time (HH:MM)
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local time="%F{yellow}%D{%H:%M}%f"
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# username, green for normal users, red for root
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local user="%(!.%F{red}.%F{green})%n%f"
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# hostname, underlined if running on a remote system through SSH
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local host="%F{green}%m%f"
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if [[ -n $SSH_CONNECTION ]]; then
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host="%U${host}%u"
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fi
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# exitcode in parentheses if not zero
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local exitcode="%(?..[%F{red}%?%f])"
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# prompt symbol, $ in cyan for normal users, # in red for root
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local symbol="%(!.%F{red}#%f.%F{cyan}>%f)"
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# battery percentage, if acpi is available
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local battery_pct=
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if type acpi &> /dev/null ; then
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battery_pct="$(acpi -b | cut -d, -f2 | sed -e 's/[^0-9]//g')"
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fi
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# colorize battery percentage or display status
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if [[ $(acpi -a | cut -d':' -f2) == " on-line" ]]; then
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battery_pct="charging"
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elif [[ $battery_pct -le 20 ]]; then
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battery_pct="%F{red}${battery_pct}%%%f"
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elif [[ $battery_pct -le 65 ]]; then
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battery_pct="%F{yellow}${battery_pct}%%%f"
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else
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PR_FILLBAR="\${(l.(($TERMWIDTH - ($promptsize + $pwdsize)))..${PR_HBAR}.)}"
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battery_pct="%F{green}${battery_pct}%%%f"
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fi
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}
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function show_battery {
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if [[ $HAS_PMSET -eq 1 ]]; then
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~/.zsh/scripts/battery_osx.sh
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fi
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}
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# prefix characters in first and second line
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local top_prefix="%F{cyan}${top_left_corner}%f"
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local bottom_prefix="%F{cyan}${bottom_left_corner}%f"
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function setprompt {
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PR_HBAR="─"
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# suffix characters in first and second line
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local top_suffix="%F{cyan}${top_right_corner}%f"
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local bottom_suffix="%F{cyan}${bottom_right_corner}%f"
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if [[ "$TERM" != "xterm" ]]; then
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PR_ULCORNER="╭"
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PR_LLCORNER="╰"
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PR_LRCORNER="╯"
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PR_URCORNER="╮"
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# combine them to create the prompt
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local top_left=""
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local top_right="${bracket_open}${time}${bracket_close}"
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local bottom_left="${bracket_open}${user}%F{green}@%f${host}${bracket_close}${exitcode}${separator}${symbol}"
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local bottom_right=
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# if $battery_pct is empty, just add a vertical line
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if [[ -n $battery_pct ]]; then
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bottom_right="${separator}${bracket_open}${battery_pct}${bracket_close}"
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else
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PR_ULCORNER="+"
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PR_LLCORNER="+"
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PR_LRCORNER="+"
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PR_URCORNER="+"
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bottom_right="%F{blue}${dash}%f"
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fi
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PR_RESET="%{$terminfo[sgr0]%}"
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# calculate width of prompt components
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local width_top_prefix=${#${(S%%%)top_prefix//$~zero/}}
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local width_top_suffix=${#${(S%%%)top_suffix//$~zero/}}
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local width_top_left=${#${(S%%%)top_left//$~zero/}}
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local width_top_right=${#${(S%%%)top_right//$~zero/}}
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###
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# Finally, the prompt.
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# calculate the maximum width of ${top_left}:
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# (-4 for brackets, -1 as spacing between top_left and top_right)
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local top_left_width_max=$((
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COLUMNS - $width_top_prefix
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- $width_top_left - 4
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- 1
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- $width_top_right
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- $width_top_suffix
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))
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PROMPT='%F{cyan}$PR_ULCORNER%F{blue}$PR_HBAR(\
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%F{magenta}%$PR_PWDLEN<...<%~%<<\
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%F{blue})$PR_HBAR%F{cyan}$PR_HBAR${(e)PR_FILLBAR}%F{blue}$PR_HBAR(\
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%F{green}%n@%m%F{blue}\
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%F{blue})$PR_HBAR%F{cyan}$PR_URCORNER\
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# truncated directory if necessary
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top_left="${bracket_open}${directory/WIDTH/${top_left_width_max}}${bracket_close}${top_left}"
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width_top_left=${#${(S%%)top_left//$~zero/}}
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%F{cyan}$PR_LLCORNER%F{blue}$PR_HBAR(\
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%F{yellow}%D{%H:%M}\
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%F{blue})$PR_HBAR%F{cyan}$PR_HBAR\
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%f '
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# calculate the width of the top prompt to fill the middle with separators
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local width=$((
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COLUMNS - width_top_prefix
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- width_top_left
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- width_top_right
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- width_top_suffix
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))
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local top_separator="%F{cyan}${(pl:${width}::$dash:)}%f"
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RPROMPT='%F{cyan}$PR_HBAR%F{blue}$PR_HBAR(\
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%F{yellow}$(show_battery)\
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%F{blue})$PR_HBAR%F{cyan}$PR_LRCORNER\
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%f'
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PROMPT="${top_prefix}${top_left}${top_separator}${top_right}${top_suffix}
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${bottom_prefix}${bottom_left} "
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PS2='%F{cyan}$PR_HBAR%F{blue}$PR_HBAR(\
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%F{green}%_
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%F{blue})$PR_HBAR%F{cyan}$PR_HBAR\
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%f '
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RPROMPT="${bottom_right}${bottom_suffix}"
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}
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setprompt
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precmd_functions+=(zshrc_prompt_precmd)
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@ -34,9 +34,5 @@ unsetopt menu_complete # do not autoselect the first completion entry
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# setopt correct # spelling correction for commands
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# setopt correctall # spelling correction for arguments
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# ===== Prompt
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setopt prompt_subst # Enable parameter expansion, command substitution, and arithmetic expansion in the prompt
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setopt transient_rprompt # only show the rprompt on the current prompt
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# ===== Scripts and Functions
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setopt multios # perform implicit tees or cats when multiple redirections are attempted
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