initial commit

libraries/FastLED/src/fl/engine_events.cpp

@@ -0,0 +1,131 @@
+#include "fl/engine_events.h"
+#include "fl/namespace.h"
+#include "fl/int.h"
+
+
+namespace fl {
+
+
+
+EngineEvents::Listener::Listener() {}
+
+EngineEvents::Listener::~Listener() {
+#if FASTLED_HAS_ENGINE_EVENTS
+    EngineEvents *ptr = EngineEvents::getInstance();
+    const bool has_listener = ptr && ptr->_hasListener(this);
+    if (has_listener) {
+        // Warning, the listener should be removed by the subclass. If we are
+        // here then the subclass did not remove the listener and we are now in
+        // a partial state of destruction and the results may be undefined for
+        // multithreaded applications. However, for single threaded (the only
+        // option as of 2024, October) this will be ok.
+        ptr->_removeListener(this);
+    }
+#endif
+}
+
+#if FASTLED_HAS_ENGINE_EVENTS
+EngineEvents *EngineEvents::getInstance() {
+    return &Singleton<EngineEvents>::instance();
+}
+#endif
+
+#if FASTLED_HAS_ENGINE_EVENTS
+void EngineEvents::_onPlatformPreLoop() {
+    for (auto &item : mListeners) {
+        auto listener = item.listener;
+        listener->onPlatformPreLoop();
+    }
+    for (auto &item : mListeners) {
+        auto listener = item.listener;
+        listener->onPlatformPreLoop2();
+    }
+}
+
+bool EngineEvents::_hasListener(Listener *listener) {
+    auto predicate = [listener](const Pair &pair) {
+        return pair.listener == listener;
+    };
+    return mListeners.find_if(predicate) != mListeners.end();
+}
+
+void EngineEvents::_addListener(Listener *listener, int priority) {
+    if (_hasListener(listener)) {
+        return;
+    }
+    for (auto it = mListeners.begin(); it != mListeners.end(); ++it) {
+        if (it->priority < priority) {
+            // this is now the highest priority in this spot.
+            EngineEvents::Pair pair = EngineEvents::Pair(listener, priority);
+            mListeners.insert(it, pair);
+            return;
+        }
+    }
+    EngineEvents::Pair pair = EngineEvents::Pair(listener, priority);
+    mListeners.push_back(pair);
+}
+
+void EngineEvents::_removeListener(Listener *listener) {
+    auto predicate = [listener](const Pair &pair) {
+        return pair.listener == listener;
+    };
+    auto it = mListeners.find_if(predicate);
+    if (it != mListeners.end()) {
+        mListeners.erase(it);
+    }
+}
+
+void EngineEvents::_onBeginFrame() {
+    // Make the copy of the listener list to avoid issues with listeners being
+    // added or removed during the loop.
+    ListenerList copy = mListeners;
+    for (auto &item : copy) {
+        auto listener = item.listener;
+        listener->onBeginFrame();
+    }
+}
+
+void EngineEvents::_onEndShowLeds() {
+    // Make the copy of the listener list to avoid issues with listeners being
+    // added or removed during the loop.
+    ListenerList copy = mListeners;
+    for (auto &item : copy) {
+        auto listener = item.listener;
+        listener->onEndShowLeds();
+    }
+}
+
+void EngineEvents::_onEndFrame() {
+    // Make the copy of the listener list to avoid issues with listeners being
+    // added or removed during the loop.
+    ListenerList copy = mListeners;
+    for (auto &item : copy) {
+        auto listener = item.listener;
+        listener->onEndFrame();
+    }
+}
+
+void EngineEvents::_onStripAdded(CLEDController *strip, fl::u32 num_leds) {
+    // Make the copy of the listener list to avoid issues with listeners being
+    // added or removed during the loop.
+    ListenerList copy = mListeners;
+    for (auto &item : copy) {
+        auto listener = item.listener;
+        listener->onStripAdded(strip, num_leds);
+    }
+}
+
+void EngineEvents::_onCanvasUiSet(CLEDController *strip,
+                                  const ScreenMap &screenmap) {
+    // Make the copy of the listener list to avoid issues with listeners being
+    // added or removed during the loop.
+    ListenerList copy = mListeners;
+    for (auto &item : copy) {
+        auto listener = item.listener;
+        listener->onCanvasUiSet(strip, screenmap);
+    }
+}
+
+#endif // FASTLED_HAS_ENGINE_EVENTS
+
+} // namespace fl