Disable spectator menu during replay

src/main/java/eu/crushedpixel/replaymod/mixin/MixinGuiSpectator.java

@@ -0,0 +1,18 @@
+package eu.crushedpixel.replaymod.mixin;
+
+import eu.crushedpixel.replaymod.replay.ReplayHandler;
+import net.minecraft.client.gui.GuiSpectator;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(GuiSpectator.class)
+public abstract class MixinGuiSpectator {
+    @Inject(method = "func_175260_a", at = @At("HEAD"), cancellable = true)
+    public void isInReplay(int i, CallbackInfo ci) {
+        if (ReplayHandler.isInReplay()) {
+            ci.cancel();
+        }
+    }
+}

src/main/resources/mixins.replaymod.json

@@ -4,6 +4,7 @@
   "mixins": [
     "MixinEffectRenderer",
     "MixinEntityRenderer",
+    "MixinGuiSpectator",
     "MixinMinecraft",
     "MixinNetHandlerPlayClient",
     "MixinPlayerControllerMP",