WebRTC cursor handler extracted + cache.

internal/webrtc/cursor/position.go

@@ -0,0 +1,68 @@
+package cursor
+
+import (
+	"reflect"
+	"sync"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+
+	"demodesk/neko/internal/types"
+)
+
+func NewPosition(desktop types.DesktopManager) *PositionCtx {
+	return &PositionCtx{
+		logger:    log.With().Str("module", "cursor-position").Logger(),
+		desktop:   desktop,
+		listeners: map[uintptr]*func(x, y int){},
+	}
+}
+
+type PositionCtx struct {
+	logger    zerolog.Logger
+	desktop   types.DesktopManager
+	emitMu    sync.Mutex
+	listeners map[uintptr]*func(x, y int)
+}
+
+func (manager *PositionCtx) Start() {
+	manager.desktop.OnCursorPosition(func(x, y int) {
+		for _, emit := range manager.listeners {
+			(*emit)(x, y)
+		}
+	})
+}
+
+func (manager *PositionCtx) Shutdown() {
+	manager.logger.Info().Msgf("shutting down")
+
+	manager.emitMu.Lock()
+	for key := range manager.listeners {
+		delete(manager.listeners, key)
+	}
+	manager.emitMu.Unlock()
+}
+
+func (manager *PositionCtx) GetCurrent() (x, y int) {
+	return manager.desktop.GetCursorPosition()
+}
+
+func (manager *PositionCtx) AddListener(listener *func(x, y int)) {
+	manager.emitMu.Lock()
+	defer manager.emitMu.Unlock()
+
+	if listener != nil {
+		ptr := reflect.ValueOf(listener).Pointer()
+		manager.listeners[ptr] = listener
+	}
+}
+
+func (manager *PositionCtx) RemoveListener(listener *func(x, y int)) {
+	manager.emitMu.Lock()
+	defer manager.emitMu.Unlock()
+
+	if listener != nil {
+		ptr := reflect.ValueOf(listener).Pointer()
+		delete(manager.listeners, ptr)
+	}
+}