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bash: fix OSC sequences

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The function calls where somethimes too slow and the terminal timed out
before accepting the entire escape sequence. By constructing the whole
string before sending via printf this problem is avoided.

I originally noticed this issue when using Alacritty on WSL, where
apparently the communication via ConPTY can be a bit slow.
This commit is contained in:
Fernando Schauenburg 2020-12-16 18:21:51 +01:00
parent 42d7fdf143
commit 655884c3f1
1 changed files with 11 additions and 27 deletions
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32
roles/bash/files/profile
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@ -239,23 +239,15 @@ alias dark='_update_colors dark'
# In tmux, OSC sequences can be forwarded to the underlying terminal by:
# * Wrapping the sequence with `DCS tmux; <sequence> ST`
# * Replacing ESC in <sequence> with ESC ESC.
_osc_start() {
if [ -n "$TMUX" ]; then
printf "\ePtmux;\e\e]"
else
printf "\e]"
fi
}
# Either ST or BEL (\a) can be used to end an OSC sequence. However, tmux
# requires ST to end its wrapping DCS.
_osc_end() {
if [ -n "$TMUX" ]; then
printf "\a\e\x5c" # 0x5c == backslash
_OSC=$(printf "\ePtmux;\e\e]")
_ST=$(printf "\a\e\\")
else
printf "\a"
_OSC=$(printf "\e]")
_ST=$(printf "\a")
fi
}
_update_colors() {
export BACKGROUND="$1"
@ -294,9 +286,7 @@ _set_iterm2_colors() { # 1: foreground, 2: background, 3: cursor
local fg="$1" bg="$2" cursor="$3"
local key rgb
while read -r key rgb; do
_osc_start
printf "1337;SetColors=%s=%s" "$key" "${rgb}"
_osc_end
printf "%s1337;SetColors=%s=%s%s" "$_OSC" "$key" "${rgb}" "$_ST"
done <<EOL
black $Base02_RGB
red $Red_RGB
@ -323,9 +313,7 @@ _set_iterm2_colors() { # 1: foreground, 2: background, 3: cursor
curbg $cursor
link $Cyan_RGB
EOL
_osc_start
printf "1337;CursorShape=2" # set cursor shape to underline
_osc_end
printf "%s1337;CursorShape=2%s" "$_OSC" "$_ST" # set cursor shape to underline
}
# Documentation for xterm at https://www.xfree86.org/4.8.0/ctlseqs.html
@ -338,9 +326,7 @@ _set_xterm_colors() { # $1 foreground, $2 background, $3 cursor
# where Ps -> 4;c;spec
# c -> index of the ANSI color to change [0..15]
# spec -> RGB value of color as rgb:RR/GG/BB
_osc_start
printf "4;%s;rgb:%s/%s/%s" "$c" "${rgb:0:2}" "${rgb:2:2}" "${rgb:4:2}"
_osc_end
printf "%s4;%s;rgb:%s/%s/%s%s" "$_OSC" "$c" "${rgb:0:2}" "${rgb:2:2}" "${rgb:4:2}" "$_ST"
done <<EOL
0 $Base02_RGB
1 $Red_RGB
@ -363,9 +349,7 @@ EOL
# Send sequence OSC Ps ; Pt BEL
# where Ps -> foreground (10), background (11), or cursor (12)
# Pt -> RGB value of color as rgb:RR/GG/BB
_osc_start
printf "%s;rgb:%s/%s/%s" "$Ps" "${rgb:0:2}" "${rgb:2:2}" "${rgb:4:2}"
_osc_end
printf "%s%s;rgb:%s/%s/%s%s" "$_OSC" "$Ps" "${rgb:0:2}" "${rgb:2:2}" "${rgb:4:2}" "$_ST"
done <<EOL
10 $fg
11 $bg