Lazy-load recipe category extras to speed up display of all recipes

Author: mezz

Library/src/main/java/mezz/jei/library/gui/recipes/RecipeLayout.java

@@ -82,6 +82,7 @@ public class RecipeLayout<R> implements IRecipeLayoutDrawable<R>, IRecipeExtrasB
 	private final ImmutableRect2i recipeTransferButtonArea;
 	private final @Nullable ShapelessIcon shapelessIcon;
 	private final RecipeLayoutInputHandler<R> inputHandler;
+	private boolean extrasCreated = false;
 
 	private ImmutableRect2i area;
 
@@ -122,7 +123,6 @@ public static <T> Optional<IRecipeLayoutDrawable<T>> create(
 				recipeBackground,
 				recipeBorderPadding
 			);
-			recipeCategory.createRecipeExtras(recipeLayout, recipe, focuses);
 			return Optional.of(recipeLayout);
 		} catch (RuntimeException | LinkageError e) {
 			LOGGER.error("Error caught from Recipe Category: {}", recipeCategory.getRecipeType(), e);
@@ -176,13 +176,21 @@ public RecipeLayout(
 		recipeCategory.onDisplayedIngredientsUpdate(recipe, Collections.unmodifiableList(recipeCategorySlots), focuses);
 	}
 
+	public void ensureRecipeExtrasAreCreated() {
+		if (!extrasCreated) {
+			extrasCreated = true;
+			recipeCategory.createRecipeExtras(this, recipe, focuses);
+		}
+	}
+
 	@Override
 	public void setPosition(int posX, int posY) {
 		area = area.setPosition(posX, posY);
 	}
 
 	@Override
 	public void drawRecipe(GuiGraphics guiGraphics, int mouseX, int mouseY) {
+		ensureRecipeExtrasAreCreated();
 		@SuppressWarnings("removal")
 		IDrawable background = recipeCategory.getBackground();
 
@@ -259,6 +267,7 @@ public void drawRecipe(GuiGraphics guiGraphics, int mouseX, int mouseY) {
 
 	@Override
 	public void drawOverlays(GuiGraphics guiGraphics, int mouseX, int mouseY) {
+		ensureRecipeExtrasAreCreated();
 		RenderSystem.setShaderColor(1.0F, 1.0F, 1.0F, 1.0F);
 
 		final int recipeMouseX = mouseX - area.getX();
@@ -335,6 +344,7 @@ public Optional<IRecipeSlotDrawable> getRecipeSlotUnderMouse(double mouseX, doub
 
 	@Override
 	public Optional<RecipeSlotUnderMouse> getSlotUnderMouse(double mouseX, double mouseY) {
+		ensureRecipeExtrasAreCreated();
 		final double recipeMouseX = mouseX - area.getX();
 		final double recipeMouseY = mouseY - area.getY();
 
@@ -381,6 +391,7 @@ public IRecipeSlotsView getRecipeSlotsView() {
 
 	@Override
 	public IRecipeSlotDrawablesView getRecipeSlots() {
+		ensureRecipeExtrasAreCreated();
 		return () -> Collections.unmodifiableList(recipeCategorySlots);
 	}
 
@@ -396,6 +407,7 @@ public IJeiInputHandler getInputHandler() {
 
 	@Override
 	public void tick() {
+		ensureRecipeExtrasAreCreated();
 		for (IRecipeWidget widget : allWidgets) {
 			widget.tick();
 		}