119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
|
package ui
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"io"
|
||
|
|
"log"
|
||
|
|
"os/exec"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"github.com/eiannone/keyboard"
|
||
|
|
)
|
||
|
|
|
||
|
|
const (
|
||
|
|
CMD_FIM = "/usr/local/bin/pf-fim.sh"
|
||
|
|
SLIDESHOW_INTERVAL = 300 * time.Second
|
||
|
|
)
|
||
|
|
|
||
|
|
func Slideshow() {
|
||
|
|
// fim placeholder so we can operate on it when a exit slideshow is received
|
||
|
|
var fim *exec.Cmd = nil
|
||
|
|
|
||
|
|
// Run slideshow
|
||
|
|
fim = exec.Command(CMD_FIM)
|
||
|
|
|
||
|
|
// Setup stdin for fim to control slideshow
|
||
|
|
stdin, err := fim.StdinPipe()
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("Error getting fim stdin : %s", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Advance slideshow every interval as defined in const()
|
||
|
|
ticker := time.NewTicker(SLIDESHOW_INTERVAL)
|
||
|
|
stop_ticker := make(chan struct{})
|
||
|
|
go func() {
|
||
|
|
for {
|
||
|
|
select {
|
||
|
|
case <-ticker.C:
|
||
|
|
_, err = io.WriteString(stdin, "n")
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("Error advancing slides : %s", err)
|
||
|
|
}
|
||
|
|
case <-stop_ticker:
|
||
|
|
ticker.Stop()
|
||
|
|
stdin.Close()
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
|
||
|
|
// Start watching for key strokes and echo them back to stdout
|
||
|
|
keysEvents, err := keyboard.GetKeys(10)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("Error setting up keyboard listener : %s", err)
|
||
|
|
}
|
||
|
|
// NOT deferring keyboard.close as we do that by hand further down when fim exits ahead of showing the config UI
|
||
|
|
|
||
|
|
// Goroutine for tracking which keys are pressed and controlling fim if appropriate
|
||
|
|
keyboardCtx, keyboardCancel := context.WithCancel(context.Background())
|
||
|
|
go func(keyboardCtx context.Context) {
|
||
|
|
for {
|
||
|
|
select {
|
||
|
|
case <-keyboardCtx.Done():
|
||
|
|
return
|
||
|
|
case event := <-keysEvents:
|
||
|
|
if event.Err != nil {
|
||
|
|
log.Fatalf("Error listening to key events : %s", err)
|
||
|
|
}
|
||
|
|
log.Printf("You pressed: key %X\n", event.Key)
|
||
|
|
|
||
|
|
// Keys for fim event management (previous/next in particular)
|
||
|
|
fimKey := ""
|
||
|
|
if event.Key == keyboard.KeyArrowLeft || event.Key == keyboard.KeyArrowDown {
|
||
|
|
fimKey = "p"
|
||
|
|
}
|
||
|
|
if event.Key == keyboard.KeyArrowRight || event.Key == keyboard.KeyArrowUp {
|
||
|
|
fimKey = "n"
|
||
|
|
}
|
||
|
|
|
||
|
|
// Exit fim and move to the config UI
|
||
|
|
if event.Key == keyboard.KeyEsc || event.Key == keyboard.KeyEnter || event.Key == keyboard.KeySpace {
|
||
|
|
if fim != nil { // Just in case someone lays on exit key or similar during startup
|
||
|
|
if err := fim.Process.Kill(); err != nil {
|
||
|
|
log.Fatalf("failed to kill fim : %s", err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break
|
||
|
|
}
|
||
|
|
|
||
|
|
// Control fim if we received a valid key for next/previous slide
|
||
|
|
if fimKey != "" {
|
||
|
|
log.Printf("Sending key to fim : %s", fimKey)
|
||
|
|
_, err = io.WriteString(stdin, fimKey)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("Error controlling fim : %s", err)
|
||
|
|
}
|
||
|
|
ticker.Reset(SLIDESHOW_INTERVAL)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}(keyboardCtx)
|
||
|
|
|
||
|
|
// Run fim
|
||
|
|
// if err := fim.Run(); err != nil {
|
||
|
|
// // Unwrap the error a bit so we can find out if a signal killed fim or something else
|
||
|
|
// // An exit code of -1 means the program didn't exit in time or was terminated by a signal (per the docs)
|
||
|
|
// if exitError, ok := err.(*exec.ExitError); ok && exitError.ExitCode() != -1 {
|
||
|
|
// log.Fatalf("Error running fim : %s", err)
|
||
|
|
// }
|
||
|
|
// }
|
||
|
|
|
||
|
|
// Stop fim slideshow advancing go routine
|
||
|
|
close(stop_ticker)
|
||
|
|
|
||
|
|
// Stop listening to keyboard events
|
||
|
|
keyboard.Close()
|
||
|
|
keyboardCancel()
|
||
|
|
|
||
|
|
}
|