Line data    Source code

       1             : /**
       2             :  Copyright (c) 2023 Stappler LLC <admin@stappler.dev>
       3             : 
       4             :  Permission is hereby granted, free of charge, to any person obtaining a copy
       5             :  of this software and associated documentation files (the "Software"), to deal
       6             :  in the Software without restriction, including without limitation the rights
       7             :  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       8             :  copies of the Software, and to permit persons to whom the Software is
       9             :  furnished to do so, subject to the following conditions:
      10             : 
      11             :  The above copyright notice and this permission notice shall be included in
      12             :  all copies or substantial portions of the Software.
      13             : 
      14             :  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      15             :  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      16             :  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      17             :  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      18             :  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      19             :  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      20             :  THE SOFTWARE.
      21             :  **/
      22             : 
      23             : #ifndef XENOLITH_SCENE_NODES_XLSUBSCRIPTIONLISTENER_H_
      24             : #define XENOLITH_SCENE_NODES_XLSUBSCRIPTIONLISTENER_H_
      25             : 
      26             : #include "XLComponent.h"
      27             : #include "SPSubscription.h"
      28             : 
      29             : namespace STAPPLER_VERSIONIZED stappler::xenolith {
      30             : 
      31             : class Scheduler;
      32             : 
      33             : class SubscriptionListener : public Component {
      34             : public:
      35             :         using DirtyCallback = Function<void(SubscriptionFlags)>;
      36             : 
      37          60 :         virtual ~SubscriptionListener() { }
      38             : 
      39             :         virtual bool init(DirtyCallback &&cb = nullptr);
      40             : 
      41             :         virtual void onEnter(Scene *) override;
      42             :         virtual void onExit() override;
      43             : 
      44             :         virtual void setCallback(DirtyCallback &&cb);
      45           2 :         virtual const DirtyCallback &getCallback() const { return _callback; }
      46             : 
      47             :         virtual void setDirty();
      48             :         virtual void update(UpdateTime);
      49             : 
      50             :         virtual void check();
      51             : 
      52             : protected:
      53             :         virtual void updateScheduler();
      54             :         virtual void schedule();
      55             :         virtual void unschedule();
      56             : 
      57             :         Scheduler *_scheduler = nullptr;
      58             :         Subscription *_subscription = nullptr;
      59             :         DirtyCallback _callback;
      60             :         bool _dirty = false;
      61             :         bool _scheduled = false;
      62             : };
      63             : 
      64             : template <typename T = Subscription>
      65             : class DataListener : public SubscriptionListener {
      66             : public:
      67         480 :         virtual ~DataListener() { }
      68             : 
      69         240 :         virtual bool init(DirtyCallback &&cb = nullptr, T *sub = nullptr) {
      70         240 :                 if (!SubscriptionListener::init(move(cb))) {
      71           0 :                         return false;
      72             :                 }
      73             : 
      74         240 :                 _binding.set(sub);
      75         240 :                 _subscription = sub;
      76         240 :                 return true;
      77             :         }
      78             : 
      79         210 :         virtual void setSubscription(T *sub) {
      80         210 :                 if (_binding != sub) {
      81         200 :                         _binding = Binding<T>(sub);
      82         200 :                         _subscription = sub;
      83         200 :                         updateScheduler();
      84         200 :                         setDirty();
      85             :                 }
      86         210 :         }
      87             : 
      88        1756 :         virtual T *getSubscription() const { return _binding.get(); }
      89             : 
      90       17864 :         virtual void update(UpdateTime dt) override {
      91       17864 :                 if (_callback && _binding && _running) {
      92       17864 :                         auto val = _binding.check();
      93       17864 :                         if (!val.empty() || _dirty) {
      94         226 :                                 _dirty = false;
      95         226 :                                 _callback(val);
      96             :                         }
      97             :                 }
      98       17864 :         }
      99             : 
     100             : protected:
     101             :         Binding<T> _binding;
     102             : };
     103             : 
     104             : }
     105             : 
     106             : #endif /* XENOLITH_SCENE_NODES_XLSUBSCRIPTIONLISTENER_H_ */