96 lines
2.1 KiB
Go
96 lines
2.1 KiB
Go
package main
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import (
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"log"
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"github.com/godbus/dbus/v5"
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)
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const (
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busName = "org.freedesktop.portal.Desktop"
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objectPath = "/org/freedesktop/portal/desktop"
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methodName = "org.freedesktop.portal.FileChooser.OpenFile"
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requestIFace = "org.freedesktop.portal.Request"
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responseSignal = "Response"
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handleToken = "revelation"
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dialogTitle = "Choose file"
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)
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func SelectFile() string {
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conn := connectDBus()
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defer conn.Close()
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responsePath := openFileDialog(conn)
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setupSignalHandler(conn, responsePath)
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return processSignal(<-waitForSignal(conn), responsePath)
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}
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func connectDBus() *dbus.Conn {
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conn, err := dbus.ConnectSessionBus()
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if err != nil {
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log.Fatalf("Failed to connect to session bus: %v", err)
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}
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return conn
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}
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func openFileDialog(conn *dbus.Conn) dbus.ObjectPath {
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options := map[string]dbus.Variant{
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"handle_token": dbus.MakeVariant(handleToken),
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"title": dbus.MakeVariant(dialogTitle),
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}
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call := conn.Object(busName, objectPath).Call(methodName, 0, "", "", options)
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if call.Err != nil {
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log.Fatalf("Failed to trigger file picker: %v", call.Err)
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}
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return call.Body[0].(dbus.ObjectPath)
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}
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func setupSignalHandler(conn *dbus.Conn, path dbus.ObjectPath) {
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err := conn.AddMatchSignal(
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dbus.WithMatchInterface(requestIFace),
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dbus.WithMatchMember(responseSignal),
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dbus.WithMatchPathNamespace(path),
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)
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if err != nil {
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log.Fatalf("Failed to add signal match: %v", err)
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}
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}
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func waitForSignal(conn *dbus.Conn) <-chan *dbus.Signal {
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ch := make(chan *dbus.Signal, 1)
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conn.Signal(ch)
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return ch
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}
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func processSignal(signal *dbus.Signal, expectedPath dbus.ObjectPath) string {
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if signal.Path != expectedPath || signal.Name != requestIFace+"."+responseSignal {
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return ""
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}
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if len(signal.Body) < 2 {
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// nothing selected
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return ""
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}
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results, ok := signal.Body[1].(map[string]dbus.Variant)
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if !ok {
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// invalid response
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return ""
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}
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urisVariant, exists := results["uris"]
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if !exists {
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// nothing selected
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return ""
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}
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uris, ok := urisVariant.Value().([]string)
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if ok && len(uris) > 0 {
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return uris[0]
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}
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return ""
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}
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