prezto_config/functions/terminal.zsh

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# Dumb terminals lack support.
if [[ "$TERM" == 'dumb' ]]; then
return
fi
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# Set the GNU Screen window number.
if [[ -n "$WINDOW" ]]; then
SCREEN_NO="%B$WINDOW%b "
else
SCREEN_NO=""
fi
# Fully supports GNU Screen, iTerm, and most modern xterm and rxvt terminals.
# Partially supports Mac OS X Terminal since it can't set window and tab separately.
# Usage: title "tab title" "window title"
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function terminal-title {
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if ! check-bool "$DISABLE_AUTO_TITLE"; then
if [[ "$TERM" == screen* ]]; then
# Set GNU Screen's hardstatus (usually truncated at 20 characters).
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printf "\ek%s\e\\" ${(V)1}
elif [[ "$TERM" == xterm* ]] || [[ "$TERM" == rxvt* ]]; then
# Set the window title.
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printf "\e]2;%s\a" ${(V)2}
# Set the tab title (will override window title on a broken terminal).
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printf "\e]1;%s\a" ${(V)1}
fi
fi
}
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# Don't override precmd/preexec, append to hook array.
autoload -Uz add-zsh-hook
# Set the tab and window titles before the prompt is displayed.
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function terminal-title-precmd {
# 15 character, left-truncated current working directory.
local terminal_tab_title="${(%):-%15<...<%~%<<}"
local terminal_window_title="${(%):-%n@%m: %~}"
terminal-title "$terminal_tab_title" "$terminal_window_title"
}
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add-zsh-hook precmd terminal-title-precmd
# Set the tab and window titles before command execution.
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function terminal-title-preexec {
emulate -L zsh
setopt extended_glob
# Command name only, or if this is sudo or ssh, the next command.
local CMD=${1[(wr)^(*=*|sudo|ssh|-*)]}
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local trimmed="${2[1,100]}"
if [[ "$2" != "$trimmed" ]]; then
trimmed="${trimmed}..."
fi
terminal-title "$CMD" "$trimmed"
}
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add-zsh-hook preexec terminal-title-preexec