[BlazeSDL] 添加 BlazeSDL 的 API

Author: fifth-light

blazesdl/api/BlazeSDLAPI.java

@@ -0,0 +1,12 @@
+package top.fifthlight.blazesdl.api;
+
+import org.jspecify.annotations.NonNull;
+import top.fifthlight.blazesdl.api.impl.BlazeSDLAPIImpl;
+
+public interface BlazeSDLAPI {
+    static BlazeSDLAPI getInstance() {
+        return BlazeSDLAPIImpl.getInstance();
+    }
+
+    void registerEventHandler(@NonNull BlazeSDLEventHandler handler);
+}

blazesdl/api/BlazeSDLEventHandler.java

@@ -0,0 +1,9 @@
+package top.fifthlight.blazesdl.api;
+
+import org.lwjgl.sdl.SDL_Event;
+
+public interface BlazeSDLEventHandler {
+    int getPriority();
+
+    boolean handleEvent(SDL_Event event);
+}

blazesdl/api/impl/BlazeSDLAPIImpl.java

@@ -0,0 +1,38 @@
+package top.fifthlight.blazesdl.api.impl;
+
+import org.jspecify.annotations.NonNull;
+import org.lwjgl.sdl.SDL_Event;
+import top.fifthlight.blazesdl.api.BlazeSDLAPI;
+import top.fifthlight.blazesdl.api.BlazeSDLEventHandler;
+
+import java.util.ArrayList;
+
+public class BlazeSDLAPIImpl implements BlazeSDLAPI {
+    private static final BlazeSDLAPIImpl instance = new BlazeSDLAPIImpl();
+    private static final ArrayList<BlazeSDLEventHandler> eventHandlers = new ArrayList<>();
+
+    public static BlazeSDLAPIImpl getInstance() {
+        return instance;
+    }
+
+    @Override
+    public synchronized void registerEventHandler(@NonNull BlazeSDLEventHandler handler) {
+        var priority = handler.getPriority();
+        var i = 0;
+        for (; i < eventHandlers.size(); i++) {
+            if (eventHandlers.get(i).getPriority() < priority) {
+                break;
+            }
+        }
+        eventHandlers.add(i, handler);
+    }
+
+    public boolean handleEvent(SDL_Event event) {
+        for (var handler : eventHandlers) {
+            if (handler.handleEvent(event)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

blazesdl/mixin/RenderSystemMixin.java

@@ -20,6 +20,7 @@
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import top.fifthlight.blazesdl.*;
 import top.fifthlight.blazesdl.SDLError;
+import top.fifthlight.blazesdl.api.impl.BlazeSDLAPIImpl;
 
 @Mixin(RenderSystem.class)
 public class RenderSystemMixin {
@@ -51,6 +52,7 @@ private static long windowIdToHandle(int id) {
     @Redirect(method = "pollEvents", at = @At(value = "INVOKE", target = "Lorg/lwjgl/glfw/GLFW;glfwPollEvents()V"))
     private static void overridePollEvents() {
         var minecraft = Minecraft.getInstance();
+        var apiImpl = BlazeSDLAPIImpl.getInstance();
         if (!(minecraft.getWindow() instanceof SDLWindow sdlWindow)) {
             GLFW.glfwPollEvents();
             return;
@@ -61,6 +63,10 @@ private static void overridePollEvents() {
         try (var stack = MemoryStack.stackPush()) {
             var event = SDL_Event.malloc(stack);
             while (SDLEvents.SDL_PollEvent(event)) {
+                if (apiImpl.handleEvent(event)) {
+                    continue;
+                }
+
                 var eventType = event.type();
                 switch (eventType) {
                     case SDLEvents.SDL_EVENT_DISPLAY_ADDED, SDLEvents.SDL_EVENT_DISPLAY_REMOVED ->