WIP converting some functions into methods.

internal/mappingrules/targets.go

@@ -0,0 +1,75 @@
+package mappingrules
+
+import (
+	"slices"
+
+	"git.annabunches.net/annabunches/joyful/internal/logger"
+	"github.com/holoplot/go-evdev"
+)
+
+func (target *RuleTargetButton) NormalizeValue(value int32) int32 {
+	if value == 0 {
+		return 1
+	}
+	return 0
+}
+
+func (target *RuleTargetAxis) NormalizeValue(value int32) int32 {
+	if !target.Inverted {
+		return value
+	}
+
+	axisRange := target.AxisEnd - target.AxisStart
+	axisMid := target.AxisEnd - axisRange/2
+	delta := value - axisMid
+	if delta < 0 {
+		delta = -delta
+	}
+
+	if value < axisMid {
+		return axisMid + delta
+	} else if value > axisMid {
+		return axisMid - delta
+	}
+
+	// If we reach here, we're either exactly at the midpoint or something
+	// strange has happened. Either way, just return the value.
+	return value
+}
+
+// RuleTargetModeSelect doesn't make sense as an input type
+func (target *RuleTargetModeSelect) NormalizeValue(value int32) int32 {
+	return -1
+}
+
+func (target *RuleTargetButton) CreateEvent(value int32, mode *string) *evdev.InputEvent {
+	return &evdev.InputEvent{
+		Type:  evdev.EV_KEY,
+		Code:  target.Code,
+		Value: value,
+	}
+}
+
+func (target *RuleTargetAxis) CreateEvent(value int32, mode *string) *evdev.InputEvent {
+	return &evdev.InputEvent{
+		Type:  evdev.EV_ABS,
+		Code:  target.Code,
+		Value: value,
+	}
+}
+
+func (target *RuleTargetModeSelect) CreateEvent(value int32, mode *string) *evdev.InputEvent {
+	if value == 0 {
+		return nil
+	}
+
+	index := 0
+	if currentMode := slices.Index(target.ModeSelect, *mode); currentMode != -1 {
+		// find the next mode
+		index = (currentMode + 1) % len(target.ModeSelect)
+	}
+
+	*mode = target.ModeSelect[index]
+	logger.Logf("Mode changed to '%s'", *mode)
+	return nil
+}