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Fix bug in almostontop that truncated long prompts

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Add collection of cursor line immediately after the previous command
completes and use this when calculating the number of lines required to
move the screen in order to display only the latest prompt.
This commit is contained in:
Kenneth Benzie 2021-12-07 16:56:08 +00:00
parent 3978f2b1c2
commit 63b7170ccb
1 changed files with 22 additions and 5 deletions
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27
prompt_fresh_setup
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@ -27,9 +27,11 @@ prompt_fresh_setup() {
if [ $almostontop -eq 1 ]; then
# Hook to clear the screen then prints the prompt with previous command at
# the top of the screen.
add-zsh-hook preexec fresh_almostontop
add-zsh-hook precmd fresh_almostontop_precmd
add-zsh-hook preexec fresh_almostontop_preexec
else
add-zsh-hook -d preexec fresh_almostontop
add-zsh-hook -d preexec fresh_almostontop_preexec
add-zsh-hook -d precmd fresh_almostontop_precmd
fi
[ $recompile -eq 1 ] && prompt_cleanup
@ -128,7 +130,20 @@ fresh_line_one() {
print -P "$time_stamp $directory$git$py$docker$result"
}
fresh_almostontop() {
# Executed before each prompt.
fresh_almostontop_precmd() {
# CSI ESC[6n gets the cursor position in the form ESC[<row>;<column>R
printf "\033[6n"
# Discard prefix delimited by [
read -s -d [
# Store the <row> delimited by ; in row_before
read -s -d \; row_before
# Discard suffix delimted by R otherwise it is output to the tty
read -s -d R
}
# Executed just after a command has been read and is about to be executed.
fresh_almostontop_preexec() {
# CSI ESC[6n gets the cursor position in the form ESC[<row>;<column>R
printf "\033[6n"
# Discard prefix delimited by [
@ -141,14 +156,16 @@ fresh_almostontop() {
# CSI ESC[<num>B moves the cursor down <num> lines
let "down = $LINES - $row"
printf "\033[${down}B"
# Calculate the number of lines in the prompt
let "prompt_lines = ($row - $row_before) + 2"
# Print new lines to push the old command out of view
let "new = $row - 3"
let "new = $row - $prompt_lines"
for (( i = 0; i < $new; i++ )); do
printf "\n"
done
# Move the cursor to the line below the prompt
# CSI ESC[<num>A moves the cursor up <num> lines
let "up = $LINES - 3"
let "up = $LINES - $prompt_lines"
printf "\033[${up}A"
}