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|
package keyboard
import (
"fmt"
"os"
"github.com/containerd/console"
"atomicgo.dev/keyboard/keys"
)
var windowsStdin *os.File
var con console.Console
var stdin = os.Stdin
var inputTTY *os.File
var mockChannel = make(chan keys.Key)
var mocking = false
func startListener() error {
err := initInput()
if err != nil {
return err
}
if mocking {
return nil
}
if con != nil {
err := con.SetRaw()
if err != nil {
return fmt.Errorf("failed to set raw mode: %w", err)
}
}
inputTTY, err = openInputTTY()
if err != nil {
return err
}
return nil
}
func stopListener() error {
if con != nil {
err := con.Reset()
if err != nil {
return fmt.Errorf("failed to reset console: %w", err)
}
}
return restoreInput()
}
// Listen calls a callback function when a key is pressed.
//
// Simple example:
//
// keyboard.Listen(func(key keys.Key) (stop bool, err error) {
// if key.Code == keys.CtrlC {
// return true, nil // Stop listener by returning true on Ctrl+C
// }
//
// fmt.Println("\r" + key.String()) // Print every key press
// return false, nil // Return false to continue listening
// })
func Listen(onKeyPress func(key keys.Key) (stop bool, err error)) error {
cancel := make(chan bool)
stopRoutine := false
go func() {
for {
select {
case c := <-cancel:
if c {
return
}
case keyInfo := <-mockChannel:
stopRoutine, _ = onKeyPress(keyInfo)
if stopRoutine {
closeInput()
inputTTY.Close()
}
}
}
}()
err := startListener()
if err != nil {
if err.Error() != "provided file is not a console" {
return err
}
}
for !stopRoutine {
key, err := getKeyPress()
if err != nil {
return err
}
// check if returned key is empty
// if reflect.DeepEqual(key, keys.Key{}) {
// return nil
// }
stop, err := onKeyPress(key)
if err != nil {
return err
}
if stop {
closeInput()
inputTTY.Close()
break
}
}
err = stopListener()
if err != nil {
return err
}
cancel <- true
return nil
}
// SimulateKeyPress simulate a key press. It can be used to mock user stdin and test your application.
//
// Example:
//
// go func() {
// keyboard.SimulateKeyPress("Hello") // Simulate key press for every letter in string
// keyboard.SimulateKeyPress(keys.Enter) // Simulate key press for Enter
// keyboard.SimulateKeyPress(keys.CtrlShiftRight) // Simulate key press for Ctrl+Shift+Right
// keyboard.SimulateKeyPress('x') // Simulate key press for a single rune
// keyboard.SimulateKeyPress('x', keys.Down, 'a') // Simulate key presses for multiple inputs
// }()
func SimulateKeyPress(input ...interface{}) error {
for _, key := range input {
// Check if key is a keys.Key
if key, ok := key.(keys.Key); ok {
mockChannel <- key
return nil
}
// Check if key is a rune
if key, ok := key.(rune); ok {
mockChannel <- keys.Key{
Code: keys.RuneKey,
Runes: []rune{key},
}
return nil
}
// Check if key is a string
if key, ok := key.(string); ok {
for _, r := range key {
mockChannel <- keys.Key{
Code: keys.RuneKey,
Runes: []rune{r},
}
}
return nil
}
// Check if key is a KeyCode
if key, ok := key.(keys.KeyCode); ok {
mockChannel <- keys.Key{
Code: key,
}
return nil
}
}
return nil
}
|
