53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
// Command groundstation-display renders the Ground Station kiosk canvas. It
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// owns its display lifecycle independently of WFB, the transmitter and the
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// video launcher: it waits for its target to appear, redraws as needed, and
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// stops only when it receives SIGINT or SIGTERM.
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package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"os"
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"os/signal"
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"syscall"
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"git.piksar.eu/piotr/groundstation/internal/display"
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)
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// buildTarget selects the target-specific opener and template. Each target
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// owns its own backend and layouts; there is no shared global template.
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// buildTarget wires one shared video presence signal into both the opener
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// (which observes the video output lifecycle) and the fallback template
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// (which shows or hides itself from it).
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func buildTarget(name string) (display.Opener, display.Template, error) {
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switch name {
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case "x11":
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video := display.NewVideoPresence()
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return display.X11Opener{Video: video},
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display.NewFallbackTemplate(video, "Brak połączenia WFB"), nil
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default:
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return nil, nil, fmt.Errorf("unknown display target %q (supported: x11)", name)
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}
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}
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func main() {
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target := flag.String("target", "x11", "display target: x11 (Viture) today; mipi planned")
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flag.Parse()
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opener, template, err := buildTarget(*target)
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if err != nil {
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log.Fatal(err)
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}
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer stop()
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// Temporary X11 unavailability never exits this process; display.Run
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// keeps retrying internally until the context is cancelled.
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if err := display.Run(ctx, opener, template, display.Options{}); err != nil {
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log.Fatalf("display: %v", err)
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}
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}
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