added rainbow
This commit is contained in:
fatalerrors
@@ -116,6 +116,7 @@ A bar-style prompt showing current time, execution time of the last command
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| `profile_upgrade` | updates | Upgrade profile to the latest version (git pull or archive) |
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| `pwdscore` | pwd | Calculate the strength score of a given password |
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| `rain` | rain | Console screensaver with falling-rain effect (multiple color themes) |
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| `rainbow` | rain | Full-screen rainbow screensaver using only background colors, with horizontal color shifting |
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| `rmhost` | ssh | Remove host (name and IP) from SSH known_hosts; supports `--all-users` as root |
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| `rmspc` | filefct | Replace spaces in filenames with underscores (or a custom character) |
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| `setc` | lang | Set locale to standard C (POSIX) |
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@@ -189,6 +190,7 @@ change the default without having to pass flags every time.
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| `RAIN_DEFAULT_SPEED` | `0.1` | Falling speed for `rain` |
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| `RAIN_DEFAULT_COLOR` | `Green` | Colour for `rain` |
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| `RAIN_DEFAULT_DENSITY` | dynamic | Maximum number of simultaneous falling elements for `rain` |
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| `RAINBOW_DEFAULT_SPEED` | `0.04` | Horizontal color shift speed for `rainbow` |
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| `MATRIX_DEFAULT_SPEED` | `0.05` | Falling speed for `matrix` |
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| `MATRIX_DEFAULT_COLOR` | `Green` | Colour for `matrix` |
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| `MATRIX_DEFAULT_DENSITY` | dynamic | Maximum number of simultaneous falling elements for `matrix` |
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@@ -233,6 +233,10 @@ TERM=xterm-256color
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# Leave unset to keep the terminal-size-based dynamic default.
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#RAIN_DEFAULT_DENSITY=80
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# rainbow: Horizontal color shift speed — integer/100 gives seconds (4 → 0.04 s).
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# Values < 1 are used as raw seconds.
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#RAINBOW_DEFAULT_SPEED=4
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# matrix: Falling speed.
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#MATRIX_DEFAULT_SPEED=3.5
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@@ -89,6 +89,7 @@ help()
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printf "profile_upgrade\tUpgrade profile to the latest version (git pull or archive)\n"
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printf "pwdscore\tCalculate the strength score of a given password\n"
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printf "rain\t\tConsole screensaver with falling-rain effect (multiple color themes)\n"
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printf "rainbow\t\tFull-screen rainbow screensaver using background colors only\n"
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printf "rmhost\t\tRemove host (name and IP) from SSH known_hosts; supports --all-users as root\n"
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printf "rmspc\t\tReplace spaces in filenames with underscores (or a custom character)\n"
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printf "setlocale\tSet console locale to any installed locale\n"
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@@ -121,6 +121,76 @@ _rain_normalize_density()
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printf "%s" "$raw_density"
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}
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_rainbow_supports_truecolor()
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{
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case "${COLORTERM:-}" in
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*truecolor*|*24bit*)
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return 0
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;;
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esac
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case "${TERM:-}" in
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*direct*|*truecolor*)
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return 0
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;;
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esac
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return 1
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}
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_rainbow_build_palette()
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{
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local palette_width="$1"
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local use_truecolor="$2"
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local x=0 wheel_pos=0 band=0 blend=0
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local red=0 green=0 blue=0
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RAINBOW_BG_PALETTE=()
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if (( palette_width < 1 )); then
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RAINBOW_BG_PALETTE+=("\e[41m")
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return 0
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fi
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if (( use_truecolor )); then
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for ((x = 0; x < palette_width; x++)); do
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wheel_pos=$((x * 1536 / palette_width))
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band=$((wheel_pos / 256))
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blend=$((wheel_pos % 256))
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case "$band" in
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0)
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red=255; green=$blend; blue=0
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;;
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1)
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red=$((255 - blend)); green=255; blue=0
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;;
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2)
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red=0; green=255; blue=$blend
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;;
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3)
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red=0; green=$((255 - blend)); blue=255
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;;
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4)
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red=$blend; green=0; blue=255
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;;
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*)
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red=255; green=0; blue=$((255 - blend))
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;;
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esac
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RAINBOW_BG_PALETTE+=("\e[48;2;${red};${green};${blue}m")
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done
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else
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local ansi_palette=(41 101 43 103 42 102 46 106 44 104 45 105)
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local ansi_count=${#ansi_palette[@]}
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for ((x = 0; x < palette_width; x++)); do
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RAINBOW_BG_PALETTE+=("\e[${ansi_palette[x * ansi_count / palette_width]}m")
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done
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fi
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}
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_rain_engine()
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{
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local step_duration="$1"
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@@ -152,7 +222,6 @@ _rain_engine()
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local term_area=0
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local frame_sleep="$step_duration"
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local sigwinch
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sigwinch()
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{
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term_width=$(tput cols)
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@@ -194,13 +263,11 @@ _rain_engine()
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fi
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}
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local do_exit
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do_exit()
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{
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exit_st=1
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}
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local do_render
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do_render()
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{
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local idx=0 y=0 drop_color="" current_char="" render_color=""
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@@ -497,6 +564,131 @@ matrix()
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_rain_engine "$step_duration" "$base_color" "matrix" "$charset" "$density_override"
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}
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export -f matrix
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# ------------------------------------------------------------------------------
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# Full-screen rainbow screensaver
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# Usage: rainbow [OPTIONS]
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rainbow()
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{
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local PARSED
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PARSED=$(getopt -o hs: --long help,speed: -n 'rainbow' -- "$@")
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# shellcheck disable=SC2181 # getopt return code is checked immediately after
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if [[ $? -ne 0 ]]; then
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disp E "Invalid options, use \"rainbow --help\" to display usage."
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return 1
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fi
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local _raw_speed="${RAINBOW_DEFAULT_SPEED:-4}"
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local frame_sleep
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frame_sleep=$(_rain_normalize_speed "$_raw_speed") || frame_sleep=0.040
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eval set -- "$PARSED"
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while true; do
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case "$1" in
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-h|--help)
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printf "Usage: rainbow [OPTIONS]\n"
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printf "Options:\n"
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printf "\t-s, --speed NUM\tSet horizontal color shift speed (default: 4 => 0.040s).\n"
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printf "\t\t\t\tValues >=1 use a /100 scale (4 => 0.04s).\n"
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printf "\t\t\t\tValues <1 are interpreted as raw seconds.\n"
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printf "\t-h, --help\t\tDisplay this help message and exit.\n\n"
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printf "The rainbow fills the whole terminal with background colors only.\n"
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printf "It uses truecolor when supported, otherwise ANSI bright backgrounds.\n"
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printf "Press q to quit.\n"
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return 0
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;;
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-s|--speed)
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frame_sleep=$(_rain_normalize_speed "$2") || {
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disp E "--speed requires a numeric value."
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return 1
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}
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shift 2
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;;
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--)
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shift
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break
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;;
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*)
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disp E "Invalid options, use \"rainbow --help\" to display usage."
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return 1
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;;
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esac
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done
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command -v tput >/dev/null 2>&1 || {
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disp E "The program 'tput' is required but not installed."
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return 1
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}
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local exit_st=0
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local term_height=0 term_width=0
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local use_truecolor=0
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local offset=0 row=0 col=0 palette_width=0 idx=0
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local row_line="" ch=""
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sigwinch()
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{
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term_width=$(tput cols)
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term_height=$(tput lines)
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((term_width < 1)) && term_width=1
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((term_height < 1)) && term_height=1
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if _rainbow_supports_truecolor; then
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use_truecolor=1
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else
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use_truecolor=0
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fi
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palette_width=$term_width
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_rainbow_build_palette "$palette_width" "$use_truecolor"
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}
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do_exit()
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{
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exit_st=1
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}
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trap do_exit TERM INT
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trap sigwinch WINCH
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stty -echo
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printf "\e[?25l"
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printf "\e[2J"
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sigwinch
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while ((exit_st <= 0)); do
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read -r -n 1 -t "$frame_sleep" ch
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case "$ch" in
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q|Q)
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do_exit
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;;
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esac
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row_line=""
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for ((col = 0; col < term_width; col++)); do
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idx=$((col - offset))
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while ((idx < 0)); do
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((idx += palette_width))
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done
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idx=$((idx % palette_width))
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row_line+="${RAINBOW_BG_PALETTE[idx]} "
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done
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row_line+=$'\e[0m'
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for ((row = 1; row <= term_height; row++)); do
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printf "\e[%d;1H%b" "$row" "$row_line"
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done
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((offset = (offset + 1) % palette_width))
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done
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printf "\e[0m\e[2J\e[H"
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printf "\e[?25h"
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stty echo
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trap - TERM INT
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trap - WINCH
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}
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export -f rainbow
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# ------------------------------------------------------------------------------
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load_conf "rain"
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Block a user