mirror of
https://github.com/mjsarfatti/beddu.git
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99 lines
2.4 KiB
Bash
99 lines
2.4 KiB
Bash
#!/usr/bin/env bash
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# shellcheck disable=SC1091
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# spin.sh - Print a spinner with a message
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[[ $BEDDU_SPIN_LOADED ]] && return
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readonly BEDDU_SPIN_LOADED=true
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SCRIPT_DIR="$(dirname -- "${BASH_SOURCE[0]}")"
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source "$SCRIPT_DIR/../00.utils/_symbols.sh"
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source "$SCRIPT_DIR/../00.utils/movements.sh"
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source "$SCRIPT_DIR/../01.core/pen.sh"
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# Make sure the cursor is shown and the spinner stopped if the script exits abnormally
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trap spop EXIT INT TERM
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# Module state variables
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_spinner_pid=""
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_frame_duration="${_spinner_frame_duration:-0.1}"
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# Print a message with a spinner at the beginning
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#
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# Usage:
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# spin [options] text
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# Options:
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# [same as pen.sh]
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# Examples:
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# spin "Installing dependencies..."
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# sleep 2
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# spop
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# pen "Let's do something else now..."
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# --or, better--
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# spin "Installing dependencies..."
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# sleep 2
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# check "Dependancies installed."
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spin() {
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local message=("$@")
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local spinner="${_spinner:-⣷⣯⣟⡿⢿⣻⣽⣾}"
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# If there is already a spinner running, stop it
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if spinning; then
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spop --keep-cursor-hidden
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fi
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# Run the spinner in the background
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(
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hide_cursor
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# Use a trap to catch USR1 signal for clean shutdown
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trap "exit 0" USR1
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# Print the first frame of the spinner
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pen -n cyan "${spinner:0:1} "
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pen "${message[@]}"
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while true; do
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for ((i = 0; i < ${#spinner}; i++)); do
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frame="${spinner:$i:1}"
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up
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bol
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pen -n cyan "${frame} "
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pen "${message[@]}"
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sleep "$_frame_duration"
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done
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done
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) &
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_spinner_pid=$!
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}
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# Stop the spinner
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spop() {
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local keep_cursor_hidden=false
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[[ "$1" == "--keep-cursor-hidden" ]] && keep_cursor_hidden=true
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if spinning; then
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# Signal spinner to exit gracefully
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kill -USR1 "${_spinner_pid}" 2>/dev/null
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# Wait briefly for cleanup
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sleep "$_frame_duration"
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# Ensure it's really gone
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if ps -p "${_spinner_pid}" >/dev/null 2>&1; then
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kill "${_spinner_pid}" 2>/dev/null
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fi
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# Manually clean up display, unless asked not to do so
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if [[ "$keep_cursor_hidden" == false ]]; then
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show_cursor
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fi
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_spinner_pid=""
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fi
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}
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# Check if a spinner is running
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spinning() {
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[[ -n "${_spinner_pid}" ]]
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}
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