feat: implement Linux global hotkey support using X11 and XDG portal backends with integrated media controls.

This commit is contained in:
jahruz67
2026-05-08 16:43:15 -07:00
parent f71d6ccd1d
commit 53637c6083
15 changed files with 845 additions and 243 deletions
+389
View File
@@ -0,0 +1,389 @@
//go:build linux
package hotkey
import (
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
"log"
"os"
"strings"
"time"
"github.com/godbus/dbus/v5"
)
const (
portalBusName = "org.freedesktop.portal.Desktop"
portalObjectPath = "/org/freedesktop/portal/desktop"
ifaceGlobalShortcuts = "org.freedesktop.portal.GlobalShortcuts"
ifaceRequest = "org.freedesktop.portal.Request"
ifaceSession = "org.freedesktop.portal.Session"
wisfreeGlobalShortcutID = "com.wisfree.push-to-record"
envForcePortal = "WISFREE_USE_PORTAL_HOTKEY"
envForceX11 = "WISFREE_USE_X11_HOTKEY"
)
func usePortalBackend() bool {
if os.Getenv(envForceX11) == "1" {
return false
}
if os.Getenv(envForcePortal) == "1" {
return true
}
if os.Getenv("WAYLAND_DISPLAY") != "" {
return true
}
return strings.EqualFold(os.Getenv("XDG_SESSION_TYPE"), "wayland")
}
func randomPortalToken() string {
b := make([]byte, 8)
if _, err := rand.Read(b); err != nil {
return "tok" + fmt.Sprintf("%d", time.Now().UnixNano())
}
return hex.EncodeToString(b)
}
func triggerForPortalSpec(mods []Modifier, key Key) string {
var ctrl, shift, alt, super bool
for _, m := range mods {
switch m {
case ModCtrl:
ctrl = true
case ModShift:
shift = true
case Mod1:
alt = true
case Mod4:
super = true
}
}
keyName := portalKeySpecName(key)
if keyName == "" {
return ""
}
var parts []string
if ctrl {
parts = append(parts, "Control")
}
if alt {
parts = append(parts, "Alt")
}
if shift {
parts = append(parts, "Shift")
}
if super {
parts = append(parts, "Super")
}
if len(parts) == 0 {
return keyName
}
return strings.Join(parts, "+") + "+" + keyName
}
func portalKeySpecName(key Key) string {
if key >= KeyA && key <= KeyZ {
return string(rune(key))
}
if key >= Key0 && key <= Key9 {
return string(rune(key))
}
switch key {
case KeySpace:
return "Space"
case KeyReturn:
return "Return"
case KeyEscape:
return "Escape"
case KeyDelete:
return "Delete"
case KeyTab:
return "Tab"
case KeyLeft:
return "Left"
case KeyRight:
return "Right"
case KeyUp:
return "Up"
case KeyDown:
return "Down"
case KeyF1:
return "F1"
case KeyF2:
return "F2"
case KeyF3:
return "F3"
case KeyF4:
return "F4"
case KeyF5:
return "F5"
case KeyF6:
return "F6"
case KeyF7:
return "F7"
case KeyF8:
return "F8"
case KeyF9:
return "F9"
case KeyF10:
return "F10"
case KeyF11:
return "F11"
case KeyF12:
return "F12"
default:
return ""
}
}
func portalWaitRequest(conn *dbus.Conn, reqPath dbus.ObjectPath) (uint32, map[string]dbus.Variant, error) {
ch := make(chan *dbus.Signal, 8)
conn.Signal(ch)
rule := fmt.Sprintf(
"type='signal',path='%s',interface='%s',member='Response'",
string(reqPath), ifaceRequest,
)
if err := conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, rule).Store(); err != nil {
return 0, nil, err
}
defer func() {
_ = conn.BusObject().Call("org.freedesktop.DBus.RemoveMatch", 0, rule).Store()
}()
timeout := time.NewTimer(45 * time.Second)
defer timeout.Stop()
for {
select {
case sig := <-ch:
if sig == nil || sig.Path != reqPath {
continue
}
if sig.Name != "Response" {
continue
}
if len(sig.Body) < 2 {
continue
}
code, ok := sig.Body[0].(uint32)
if !ok {
continue
}
results, _ := sig.Body[1].(map[string]dbus.Variant)
return code, results, nil
case <-timeout.C:
return 0, nil, fmt.Errorf("portal request timed out")
}
}
}
func variantToObjectPath(v dbus.Variant) (dbus.ObjectPath, bool) {
switch x := v.Value().(type) {
case dbus.ObjectPath:
return x, true
case string:
return dbus.ObjectPath(x), true
default:
return "", false
}
}
// registerPortal binds a global shortcut via org.freedesktop.portal.GlobalShortcuts (Wayland / desktop-agnostic).
func (hk *Hotkey) registerPortal() error {
trigger := triggerForPortalSpec(hk.mods, hk.key)
if trigger == "" {
return fmt.Errorf("unsupported key for portal global shortcuts")
}
conn, err := dbus.SessionBus()
if err != nil {
return fmt.Errorf("dbus session: %w", err)
}
portal := conn.Object(portalBusName, portalObjectPath)
createOpts := map[string]dbus.Variant{
"handle_token": dbus.MakeVariant(randomPortalToken()),
"session_handle_token": dbus.MakeVariant(randomPortalToken()),
}
var createReqPath dbus.ObjectPath
if err := portal.Call(ifaceGlobalShortcuts+".CreateSession", 0, createOpts).Store(&createReqPath); err != nil {
_ = conn.Close()
return fmt.Errorf("CreateSession: %w", err)
}
code, results, err := portalWaitRequest(conn, createReqPath)
if err != nil {
_ = conn.Close()
return fmt.Errorf("CreateSession wait: %w", err)
}
if code != 0 {
_ = conn.Close()
return fmt.Errorf("CreateSession rejected (code %d)", code)
}
v, ok := results["session_handle"]
if !ok {
_ = conn.Close()
return errors.New("CreateSession: missing session_handle")
}
sessPath, okp := variantToObjectPath(v)
if !okp || sessPath == "" {
_ = conn.Close()
return errors.New("CreateSession: invalid session_handle")
}
shortcutTuple := []interface{}{
wisfreeGlobalShortcutID,
map[string]dbus.Variant{
"description": dbus.MakeVariant("Hold to dictate; release to transcribe (WIS Free)"),
"preferred_trigger": dbus.MakeVariant(trigger),
},
}
shortcutsArg := []interface{}{shortcutTuple}
bindOpts := map[string]dbus.Variant{
"handle_token": dbus.MakeVariant(randomPortalToken()),
}
var bindReqPath dbus.ObjectPath
if err := portal.Call(ifaceGlobalShortcuts+".BindShortcuts", 0, sessPath, shortcutsArg, "", bindOpts).Store(&bindReqPath); err != nil {
_ = conn.Object(portalBusName, sessPath).Call(ifaceSession+".Close", 0).Store()
_ = conn.Close()
return fmt.Errorf("BindShortcuts: %w", err)
}
code, results, err = portalWaitRequest(conn, bindReqPath)
if err != nil {
_ = conn.Object(portalBusName, sessPath).Call(ifaceSession+".Close", 0).Store()
_ = conn.Close()
return err
}
if code != 0 {
_ = conn.Object(portalBusName, sessPath).Call(ifaceSession+".Close", 0).Store()
_ = conn.Close()
return fmt.Errorf("BindShortcuts rejected (code %d); install a desktop with GlobalShortcuts portal support (e.g. recent KDE Plasma) or set %s=1 to force X11 hotkeys under XWayland", code, envForceX11)
}
if sc, ok := results["shortcuts"]; ok {
if ar, ok := sc.Value().([][]interface{}); ok && len(ar) == 0 {
log.Printf("wis-free-v3 hotkey: BindShortcuts returned empty shortcut list (desktop may have declined the binding)")
}
}
hk.mu.Lock()
if hk.registered {
hk.mu.Unlock()
_ = conn.Object(portalBusName, sessPath).Call(ifaceSession+".Close", 0).Store()
_ = conn.Close()
return errors.New("hotkey already registered.")
}
hk.backend = linuxHKPortal
hk.registered = true
hk.portalConn = conn
hk.sessionPath = sessPath
hk.portalStop = make(chan struct{})
hk.portalDone = make(chan struct{})
hk.mu.Unlock()
go hk.portalSignalLoop()
return nil
}
func (hk *Hotkey) portalSignalLoop() {
defer close(hk.portalDone)
hk.mu.Lock()
conn := hk.portalConn
sess := hk.sessionPath
hk.mu.Unlock()
if conn == nil {
return
}
ch := make(chan *dbus.Signal, 32)
conn.Signal(ch)
rule := fmt.Sprintf(
"type='signal',interface='%s',path='%s'",
ifaceGlobalShortcuts, string(portalObjectPath),
)
if err := conn.BusObject().Call("org.freedesktop.DBus.AddMatch", 0, rule).Store(); err != nil {
log.Printf("wis-free-v3 hotkey: AddMatch GlobalShortcuts: %v", err)
return
}
defer func() { _ = conn.BusObject().Call("org.freedesktop.DBus.RemoveMatch", 0, rule).Store() }()
for {
select {
case <-hk.portalStop:
return
case sig, ok := <-ch:
if !ok || sig == nil {
return
}
if sig.Path != portalObjectPath {
continue
}
if len(sig.Body) < 2 {
continue
}
sessVar, ok := sig.Body[0].(dbus.ObjectPath)
if !ok {
if s, ok := sig.Body[0].(string); ok {
sessVar = dbus.ObjectPath(s)
} else {
continue
}
}
if sessVar != sess {
continue
}
id, ok := sig.Body[1].(string)
if !ok || id != wisfreeGlobalShortcutID {
continue
}
name := sig.Name
switch {
case name == "Activated" || strings.HasSuffix(name, ".Activated"):
select {
case hk.keydownIn <- Event{}:
default:
}
case name == "Deactivated" || strings.HasSuffix(name, ".Deactivated"):
select {
case hk.keyupIn <- Event{}:
default:
}
}
}
}
}
// cleanupPortal stops the portal listener and closes the session (unlock before call).
func (hk *Hotkey) cleanupPortal() error {
hk.mu.Lock()
stopCh := hk.portalStop
doneCh := hk.portalDone
conn := hk.portalConn
sess := hk.sessionPath
hk.portalStop = nil
hk.portalDone = nil
hk.portalConn = nil
hk.sessionPath = ""
hk.backend = linuxHKNone
hk.mu.Unlock()
if stopCh != nil {
close(stopCh)
}
if doneCh != nil {
<-doneCh
}
if conn != nil && sess != "" {
_ = conn.Object(portalBusName, sess).Call(ifaceSession+".Close", 0).Store()
_ = conn.Close()
}
return nil
}