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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| #!/usr/bin/env bash | ||
| set -Eeu -o pipefail | ||
| # author: github.com/jcaillon | ||
| # description: This script can be sourced by commands to provide convenient functions. | ||
| # fsfs stands for full srceen fuzzy search. | ||
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| # shellcheck source=lib-ansi-codes | ||
| source ansi-codes interactive io | ||
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| #=============================================================== | ||
| # >>> Events | ||
| #=============================================================== | ||
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| #=============================================================== | ||
| # >>> Custom drawing functions | ||
| #=============================================================== | ||
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| function fsfs::searchCommand() { | ||
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| local originalTraps | ||
| io::captureOutput trap -p SIGWINCH EXIT SIGINT SIGQUIT | ||
| originalTraps="${LAST_RETURNED_VALUE}" | ||
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| _CLOSE_INTERACTIVE_SESSION=false | ||
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| # we still need to export the terminal size but in addition, we need to _drawScreen. | ||
| # Note: SIGWINCH does not interrupt a read command and wait for it to complete so we need | ||
| # to set a timeout on read to allow this refresh. | ||
| trap 'system::exportTerminalSize; _drawScreen' SIGWINCH | ||
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| # still need to handle the exit, but we also need to reset the terminal when exiting. | ||
| trap '_resetTerminal; main::onExitInternal' EXIT | ||
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| # interrupting closes the interactive session | ||
| trap '_interruptSession' SIGINT SIGQUIT | ||
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| _setupTerminal | ||
| _drawScreen | ||
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| while true; do | ||
| read -t 0.1 -srn 1 && key "${REPLY}" | ||
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| # break if fd 1 is closed or does not refer to a terminal. | ||
| if [[ ! -t 1 || ${_CLOSE_INTERACTIVE_SESSION} == "true" ]]; then break; fi | ||
| done | ||
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| # restore the initial traps | ||
| eval "${originalTraps}" | ||
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| _resetTerminal | ||
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| log::info "Bye!" | ||
| } | ||
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| function _drawScreen() { | ||
| writeToStatusBar "Terminal size is: ${GLOBAL_COLUMNS}x${GLOBAL_LINES}" | ||
| } | ||
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| function _setupTerminal() { | ||
| if command -v stty &>/dev/null; then | ||
| stty -echo &>/dev/null | ||
| fi | ||
| printf '%s' "${enableAlternateBufferScreen}${cursorHide}${eraseScreen}" | ||
| } | ||
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| function _resetTerminal() { | ||
| printf '%s' "${cursorShow}${disableAlternateBufferScreen}" | ||
| if command -v stty &>/dev/null; then | ||
| stty echo &>/dev/null | ||
| fi | ||
| } | ||
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| function _interruptSession() { | ||
| _CLOSE_INTERACTIVE_SESSION=true | ||
| return 0 | ||
| } | ||
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| # Write a message to the status bar. | ||
| function writeToStatusBar() { | ||
| printf '%s' "${cursorSavePos}${cursorMove}$((GLOBAL_LINES - 1));1${_to}${eraseLine}${textBold}${1}${textReset}${cursorRestorePos}" | ||
| } | ||
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| function key() { | ||
| local keyPressed="${1}" | ||
| local specialKeyPress=false | ||
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| # Special key detection. | ||
| if [[ ${keyPressed} == $'\e' ]]; then | ||
| read -t 0.1 -rsn 2 | ||
| keyPressed="${keyPressed}${REPLY}" | ||
| specialKeyPress=true | ||
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| local sk2 | ||
| printf -v sk2 "%q" "${keyPressed}" | ||
| writeToStatusBar "Special key pressed: ⌜${sk2}⌝." | ||
| fi | ||
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| case ${keyPressed} in | ||
| $'\e[C' | $'\eOC' | "") | ||
| writeToStatusBar right or enter | ||
| ;; | ||
| $'\e[D' | $'\eOD' | $'\177' | $'\b') | ||
| writeToStatusBar left or backspace | ||
| ;; | ||
| $'\e[B' | $'\eOB') | ||
| writeToStatusBar down | ||
| ;; | ||
| $'\e[A' | $'\eOA') | ||
| writeToStatusBar up | ||
| ;; | ||
| s) | ||
| writeToStatusBar Start search | ||
| search "search" | ||
| ;; | ||
| q) | ||
| _CLOSE_INTERACTIVE_SESSION=true | ||
| ;; | ||
| *) | ||
| if [[ ${specialKeyPress} == "false" ]]; then | ||
| writeToStatusBar "Normal key pressed: ⌜${keyPressed}⌝." | ||
| fi | ||
| ;; | ||
| esac | ||
| } | ||
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| function search() { | ||
| local keyPressed | ||
| local searchString="" | ||
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| printf '%s' "${cursorShow}${cursorMove}$((GLOBAL_LINES));1${_to}${eraseLine}" | ||
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| while IFS= read -rsn 1 -p "${cursorHide}${_drawScreenPrompt}${cursorShow}${textBold}SEARCH:${textReset} ${searchString}" keyPressed; do | ||
| case ${keyPressed} in | ||
| # Backspace. | ||
| $'\177' | $'\b') | ||
| searchString=${searchString%?} | ||
| ;; | ||
| # Escape key. | ||
| $'\e') | ||
| read -t 0.1 -rsn 2 | ||
| searchString= | ||
| break | ||
| ;; | ||
| # Enter/Return. | ||
| "") | ||
| writeToStatusBar "You searched: ${searchString}" | ||
| break | ||
| ;; | ||
| *) | ||
| searchString+=$keyPressed | ||
| ;; | ||
| esac | ||
| done | ||
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| printf '%s' "${cursorHide}${eraseLine}" | ||
| } | ||
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