joyful/internal/mappingrules/mapping_rule_combo.go

48 lines
1.1 KiB
Go

package mappingrules
import "github.com/holoplot/go-evdev"
// A Combo Mapping Rule can require multiple physical button presses for a single output button
type MappingRuleCombo struct {
MappingRuleBase
Inputs []RuleTarget
State int
}
func (rule *MappingRuleCombo) MatchEvent(device *evdev.InputDevice, event *evdev.InputEvent, mode *string) *evdev.InputEvent {
if !rule.MappingRuleBase.modeCheck(mode) {
return nil
}
// Check each of the inputs, and if we find a match, proceed
var match RuleTarget
for _, input := range rule.Inputs {
if device == input.GetDevice() &&
event.Code == input.GetCode() {
match = input
}
}
if match == nil {
return nil
}
// Get the value and add/subtract it from State
inputValue := match.NormalizeValue(event.Value)
oldState := rule.State
if inputValue == 0 {
rule.State = max(rule.State-1, 0)
}
if inputValue == 1 {
rule.State++
}
targetState := len(rule.Inputs)
if oldState == targetState-1 && rule.State == targetState {
return rule.Output.CreateEvent(1, mode)
}
if oldState == targetState && rule.State == targetState-1 {
return rule.Output.CreateEvent(0, mode)
}
return nil
}