core/11_terminal/11_terminal.zshrc

   1 # AX-ZSH: Alex' Modular ZSH Configuration
   2 # 10_terminal.zshrc: Initialize terminal settings
   3
   4 # Fix up TERM. Do this here (and not in zprofile), because terminal emulators
   5 # often don't start a new login shell but "only" a new interactive shell.
   6
   7 # VTE based terminals (like GNOME Terminal) support 256 colors, but old(er)
   8 # versions of GNOME Terminal (at least) set TERM=xterm ...
   9 [[ "$TERM" = "xterm" && "$VTE_VERSION" != "" ]] && TERM="xterm-256color"
  10
  11 # Common helper functions
  12
  13 # Check if terminal supports Unicode.
  14 # <https://wiki.grml.org/doku.php?id=utf8>
  15 function axzsh_is_utf_terminal {
  16         case "$LANG $CHARSET $LANGUAGE" in
  17                 (*utf*) return 0 ;;
  18                 (*UTF*) return 0 ;;
  19                 (*) return 1 ;;
  20         esac
  21 }
  22 alias isutfenv=axzsh_is_utf_terminal
  23
  24 # Check if terminal supports "wide" characters.
  25 # <https://unix.stackexchange.com/questions/184345/detect-how-much-of-unicode-my-terminal-supports-even-through-screen>
  26 typeset -g _axzsh_is_widechar_terminal_cache
  27 function axzsh_is_widechar_terminal {
  28         if [[ -z "$_axzsh_is_widechar_terminal_cache" ]]; then
  29                 # No cached result, call test function ...
  30                 _axzsh_is_widechar_terminal
  31                 _axzsh_is_widechar_terminal_cache=$?
  32         fi
  33         return $_axzsh_is_widechar_terminal_cache
  34 }
  35 function _axzsh_is_widechar_terminal {
  36         [[ -t 1 ]] || return 1
  37         [[ -z "$AXZSH_PLUGIN_CHECK" ]] || return 1
  38         axzsh_is_utf_terminal || return 1
  39         echo -ne "🍀\033[6n"
  40         read -s -d\[ garbage
  41         read -s -d R pos
  42         echo -ne "\033[1K\r"
  43         [[ "${pos#*;}" -eq 2 ]] || return 1
  44         return 0
  45 }
  46
  47 # Test for "modern" terminal
  48 function axzsh_is_modern_terminal {
  49         [[ "$TERM" = cygwin ]] && return 0
  50         [[ "$TERM" = screen* ]] && return 0
  51         [[ "$TERM" = tmux* ]] && return 0
  52         [[ "$TERM" = xterm* ]] && return 0
  53         return 1
  54 }
  55
  56 # Test for "dumb" terminal
  57 function axzsh_is_dumb_terminal {
  58         axzsh_is_modern_terminal && return 1
  59         [[ "$TERM" = dumb* ]] && return 0
  60         [[ "$TERM" = "vt52" ]] && return 0
  61         return 1
  62 }
  63
  64 # Resize terminal window (when possible)
  65 function axzsh_resize_terminal {
  66         printf '\e[8;%d;%dt' "$2" "$1"
  67 }
  68
  69 # Set terminal title
  70
  71 # Set terminal "hardstatus" and "icon title"
  72 function axzsh_terminal_set_icon_title {
  73         [[ "$TERM" == "screen"* ]] && printf '\ek%s\e\\' "$1"
  74         printf '\e]1;%s\a' "$1"
  75 }
  76
  77 # Set terminal window title
  78 function axzsh_terminal_set_window_title {
  79         printf '\e]2;%s\a' "$1"
  80 }
  81
  82 # Update terminal titles befor echoing the shell prompt
  83 function axzsh_terminal_title_precmd {
  84         axzsh_is_modern_terminal || return
  85         axzsh_terminal_set_window_title ''
  86         if [[ "$TERM_PROGRAM" == "Apple_Terminal" && "$TERM" != "screen"* ]]; then
  87                 axzsh_terminal_set_icon_title "$LOGNAME@$SHORT_HOST"
  88                 # Update CWD in Terminal.app
  89                 local url=$(echo "file://$HOSTNAME$PWD" | sed -e 's| |%20|g')
  90                 printf '\e]7;%s\a' "$url"
  91         else
  92                 axzsh_terminal_set_icon_title "$LOGNAME@$SHORT_HOST:$PWD"
  93         fi
  94 }
  95
  96 precmd_functions+=(axzsh_terminal_title_precmd)
  97
  98 # Update terminal titles befor executing a command
  99 function axzsh_terminal_title_preexec {
 100         axzsh_is_modern_terminal || return
 101
 102         local cmd="${1[(w)1]}"
 103         local remote=""
 104
 105         case "$cmd" in
 106           "mosh"*|"root"*|"ssh"*|"telnet"*)
 107                 remote=1
 108                 ;;
 109         esac
 110         if [[ "$TERM_PROGRAM" == "Apple_Terminal" ]]; then
 111                 # Apple Terminal.app ...
 112                 if [[ -n "$remote" ]]; then
 113                         # Reset CWD for remote commands
 114                         printf '\e]7;%s\a' ''
 115                 fi
 116         fi
 117
 118         if [[ -n "$cmd" ]]; then
 119                 # Add the command to the title
 120                 TITLE_ADD=" – $cmd"
 121         fi
 122
 123         if [[ -z "$remote" ]]; then
 124                 axzsh_terminal_set_icon_title "$LOGNAME@$SHORT_HOST$TITLE_ADD"
 125         else
 126                 axzsh_terminal_set_icon_title "$1"
 127         fi
 128 }
 129
 130 preexec_functions+=(axzsh_terminal_title_preexec)
 131
 132 alias axttyinfo="nocorrect zsh $AXZSH/bin/axttyinfo"
 133
 134 axzsh_is_dumb_terminal && return 0
 135
 136 # Colors
 137 # See <https://en.wikipedia.org/wiki/ANSI_escape_code#Colors>, for exmaple.
 138
 139 autoload -Uz colors
 140 colors
 141
 142 if axzsh_is_modern_terminal; then
 143         fg[default]="\e[39m"
 144         bg[default]="\e[49m"
 145 else
 146         fg[default]="\e[37m"
 147         bg[default]="\e[47m"
 148 fi
 149
 150 # Foreground (FG) and background (BG) colors.
 151 typeset -Ag FG BG
 152 case "$TERM" in
 153         *-256color)
 154                 TERM_COLORS=255
 155                 for color in {000..$TERM_COLORS}; do
 156                         FG[$color]="%{\e[38;5;${color}m%}"
 157                         BG[$color]="%{\e[48;5;${color}m%}"
 158                 done
 159                 ;;
 160         *)
 161                 TERM_COLORS=15
 162                 typeset -i c
 163                 for color in {000..$TERM_COLORS}; do
 164                         c=$color
 165                         if [[ $c -ge 8 ]]; then
 166                                 c=$c-8
 167                                 p="1;"
 168                         fi
 169                         FG[$color]="%{\e[${p}3${c}m%}"
 170                         BG[$color]="%{\e[${p}4${c}m%}"
 171                 done
 172                 unset c p
 173 esac
 174 export TERM_COLORS
 175
 176 # Text effects (FX)
 177 # See <https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_parameters>, for example.
 178
 179 typeset -Ag FX
 180 FX=(
 181         reset     "%{\e[0m%}"
 182         bold      "%{\e[1m%}"   no-bold      "%{\e[22m%}"
 183         italic    "%{\e[3m%}"   no-italic    "%{\e[23m%}"
 184         underline "%{\e[4m%}"   no-underline "%{\e[24m%}"
 185         blink     "%{\e[5m%}"   no-blink     "%{\e[25m%}"
 186         reverse   "%{\e[7m%}"   no-reverse   "%{\e[27m%}"
 187 )
 188
 189 ZSH_SPECTRUM_TEXT=${ZSH_SPECTRUM_TEXT:-The quick brown fox jumps over the lazy dog}
 190
 191 # Show all 256 foreground colors with color number
 192 function spectrum_ls() {
 193         for code in {000..$TERM_COLORS}; do
 194                 print -P -- "$code: $FG[$code]$ZSH_SPECTRUM_TEXT$FX[reset]"
 195         done
 196 }
 197
 198 # Show all 256 background colors with color number
 199 function spectrum_bls() {
 200         for code in {000..$TERM_COLORS}; do
 201                 print -P -- "$code: $BG[$code]$ZSH_SPECTRUM_TEXT$FX[reset]"
 202         done
 203 }
 204
 205 # NOTE for FG, BG and FX arrays, and spectrum_ls() and spectrum_bls() functions:
 206 # Based on a script to make using 256 colors in zsh less painful, written by
 207 # P.C. Shyamshankar <sykora@lucentbeing.com>.
 208 # Copied from OhMyZsh https://github.com/robbyrussell/oh-my-zsh/blob/master/lib/spectrum.zsh
 209 # which was copied from https://github.com/sykora/etc/blob/master/zsh/functions/spectrum/ :-)