After commit c018f5fd29 Fenrir is being switched over to go. If you do not want to be part of the testing process, please switch to master.

internal/input/learn.go

@@ -0,0 +1,42 @@
+// Copyright (c) 2026 Storm Dragon
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package input
+
+import (
+	"slices"
+
+	"git.stormux.org/storm/fenrir/internal/command"
+)
+
+// LearnKey describes a captured fresh press. Command is metadata only: it is
+// never placed in Decision.Command and cannot launch an action or script.
+type LearnKey struct {
+	Code    uint16
+	Held    []uint16
+	Command command.ID
+	Bare    bool
+}
+
+func (r *Router) learn_key(device int, key uint16, numLock bool) *LearnKey {
+	pressed := &LearnKey{Code: key, Bare: r.empty()}
+	seen := map[uint16]bool{}
+	for _, held := range r.keys {
+		for code := range held {
+			seen[code] = true
+		}
+	}
+	for code := range seen {
+		pressed.Held = append(pressed.Held, code)
+	}
+	slices.Sort(pressed.Held)
+	id, scriptChord := r.script_binding(key, numLock)
+	if !scriptChord {
+		id = r.binding(key, numLock)
+	}
+	if !pure_modifier(key) && !reader_modifier(key, numLock) {
+		id = r.multi_press(device, r.binding_chord(key, numLock), id, scriptChord)
+	}
+	pressed.Command = id
+	return pressed
+}