Added FocusedStackProvider api.

Optimised item rendering.

Signed-off-by: shedaniel <daniel@shedaniel.me>

3 files changed, 59 insertions, 1 deletions

diff --git a/src/main/java/me/shedaniel/rei/api/FocusedStackProvider.java b/src/main/java/me/shedaniel/rei/api/FocusedStackProvider.java
new file mode 100644
index 000000000..ec13a37cc
--- /dev/null
+++ b/src/main/java/me/shedaniel/rei/api/FocusedStackProvider.java
@@ -0,0 +1,40 @@
+/*
+ * This file is licensed under the MIT License, part of Roughly Enough Items.
+ * Copyright (c) 2018, 2019, 2020 shedaniel
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package me.shedaniel.rei.api;
+
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.util.TypedActionResult;
+import org.jetbrains.annotations.NotNull;
+
+public interface FocusedStackProvider {
+    /**
+     * @return the priority of this handler, higher priorities will be called first.
+     */
+    default double getPriority() {
+        return 0d;
+    }
+    
+    @NotNull
+    TypedActionResult<EntryStack> provide(Screen screen);
+}
diff --git a/src/main/java/me/shedaniel/rei/api/OptimalEntryStack.java b/src/main/java/me/shedaniel/rei/api/OptimalEntryStack.java
index a7a4a4f04..8f7c2bf39 100644
--- a/src/main/java/me/shedaniel/rei/api/OptimalEntryStack.java
+++ b/src/main/java/me/shedaniel/rei/api/OptimalEntryStack.java
@@ -24,15 +24,25 @@
 package me.shedaniel.rei.api;
 
 import me.shedaniel.math.Rectangle;
+import net.minecraft.client.render.VertexConsumerProvider;
 import net.minecraft.client.util.math.MatrixStack;
 import org.jetbrains.annotations.ApiStatus;
 
 @ApiStatus.Internal
 public interface OptimalEntryStack {
+    static int groupingHashFrom(EntryStack stack) {
+        if (stack instanceof OptimalEntryStack) return ((OptimalEntryStack) stack).groupingHash();
+        return stack.getClass().hashCode();
+    }
+    
+    default int groupingHash() {
+        return getClass().hashCode();
+    }
+    
     default void optimisedRenderStart(MatrixStack matrices, float delta) {
     }
     
-    default void optimisedRenderBase(MatrixStack matrices, Rectangle bounds, int mouseX, int mouseY, float delta) {
+    default void optimisedRenderBase(MatrixStack matrices, VertexConsumerProvider.Immediate immediate, Rectangle bounds, int mouseX, int mouseY, float delta) {
     }
     
     default void optimisedRenderOverlay(MatrixStack matrices, Rectangle bounds, int mouseX, int mouseY, float delta) {
diff --git a/src/main/java/me/shedaniel/rei/api/RecipeHelper.java b/src/main/java/me/shedaniel/rei/api/RecipeHelper.java
index 04b699b5a..b46280a63 100644
--- a/src/main/java/me/shedaniel/rei/api/RecipeHelper.java
+++ b/src/main/java/me/shedaniel/rei/api/RecipeHelper.java
@@ -27,12 +27,14 @@ import me.shedaniel.math.Rectangle;
 import me.shedaniel.rei.RoughlyEnoughItemsCore;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
+import net.minecraft.client.gui.screen.Screen;
 import net.minecraft.client.gui.screen.ingame.ContainerScreen;
 import net.minecraft.recipe.Recipe;
 import net.minecraft.recipe.RecipeManager;
 import net.minecraft.util.Identifier;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 import java.util.Map;
@@ -53,6 +55,12 @@ public interface RecipeHelper {
     
     AutoTransferHandler registerAutoCraftingHandler(AutoTransferHandler handler);
     
+    void registerFocusedStackProvider(FocusedStackProvider provider);
+    
+    @Nullable
+    @ApiStatus.Internal
+    EntryStack getScreenFocusedStack(Screen screen);
+    
     List<AutoTransferHandler> getSortedAutoCraftingHandler();
     
     /**