Update Tween.h

Tween.h

@@ -46,11 +46,16 @@ class Tween {
 private:
   static inline Tween* head = nullptr;
   static inline Tween* last = nullptr;
-  Tween* next;
+  Tween* next = nullptr;
 
   TweenListener* listener = nullptr;
 
 public:
+  Tween(const Tween&) = delete;
+  Tween& operator=(const Tween&) = delete;
+  Tween(Tween&& other) noexcept;
+  Tween& operator=(Tween&& other) noexcept;
+
   Tween(uint16_t fps = 30) {
     setFps(fps);
     frameRateTimer = millis();
@@ -78,6 +83,20 @@ public:
   ///////
 
 private:
+  void unlinkFromList() {
+    if (Tween::head == nullptr) return;
+    if (this == Tween::head) {
+      Tween::head = this->next;
+      if (this == Tween::last) Tween::last = nullptr;
+    } else {
+      Tween* prev = Tween::head;
+      while (prev && prev->next != this) prev = prev->next;
+      if (prev) prev->next = this->next;
+      if (this == Tween::last) Tween::last = prev;
+    }
+    this->next = nullptr;
+  }
+
   uint16_t frameTime;
   float dt;
   uint32_t oldMillis;
@@ -300,21 +319,83 @@ public:
   static float lerp(float a, float b, float t) {
     return a + (b - a) * t;
   }
-
-private:
-  // int clamp(int value, int a, int b) {
-  //   if (a > b) {
-  //     a ^= b;
-  //     b ^= a;
-  //     a ^= b;
-  //   }
-  //   if (value < a) return a;
-  //   else if (value > b) return b;
-  //   else return value;
-  // }
 };
 
+//----------------------------------------------------------------------
+//                         TWEEN MOVE SEMANTICS                         
+//----------------------------------------------------------------------
+inline Tween::Tween(Tween&& other) noexcept {
+  unlinkFromList();
 
+  next = other.next;
+  listener = other.listener;
+  frameTime = other.frameTime;
+  dt = other.dt;
+  oldMillis = other.oldMillis;
+  frameRateTimer = other.frameRateTimer;
+  from = other.from;
+  to = other.to;
+  duration = other.duration;
+  easing = other.easing;
+  easingFunc = std::move(other.easingFunc);
+  progress = other.progress;
+  isPlayingF = other.isPlayingF;
+  triggerLastTick = other.triggerLastTick;
+  current = other.current;
+
+  other.next = nullptr;
+  other.listener = nullptr;
+  other.easing = nullptr;
+  other.easingFunc = nullptr;
+  other.isPlayingF = false;
+  other.triggerLastTick = false;
+
+  if (Tween::head == &other) Tween::head = this;
+  else {
+    Tween* prev = Tween::head;
+    while (prev && prev->next != &other) prev = prev->next;
+    if (prev) prev->next = this;
+  }
+  if (Tween::last == &other) Tween::last = this;
+}
+
+inline Tween& Tween::operator=(Tween&& other) noexcept {
+  if (this != &other) {
+    unlinkFromList();
+
+    next = other.next;
+    listener = other.listener;
+    frameTime = other.frameTime;
+    dt = other.dt;
+    oldMillis = other.oldMillis;
+    frameRateTimer = other.frameRateTimer;
+    from = other.from;
+    to = other.to;
+    duration = other.duration;
+    easing = other.easing;
+    easingFunc = std::move(other.easingFunc);
+    progress = other.progress;
+    isPlayingF = other.isPlayingF;
+    triggerLastTick = other.triggerLastTick;
+    current = other.current;
+
+    other.next = nullptr;
+    other.listener = nullptr;
+    other.easing = nullptr;
+    other.easingFunc = nullptr;
+    other.isPlayingF = false;
+    other.triggerLastTick = false;
+
+    if (Tween::head == &other) Tween::head = this;
+    else {
+      Tween* prev = Tween::head;
+      while (prev && prev->next != &other) prev = prev->next;
+      if (prev) prev->next = this;
+    }
+    if (Tween::last == &other) Tween::last = this;
+  }
+  return *this;
+}
 
 //----------------------------------------------------------------------
 //                         ANIMATION  CHAIN