Extend single block FakeLevel

src/main/java/com/ldtteam/blockui/BOGuiGraphics.java

@@ -9,6 +9,7 @@
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.Font;
 import net.minecraft.client.gui.GuiGraphics;
+import net.minecraft.client.gui.screens.Screen;
 import net.minecraft.client.renderer.ItemBlockRenderTypes;
 import net.minecraft.client.renderer.LightTexture;
 import net.minecraft.client.renderer.MultiBufferSource.BufferSource;
@@ -184,4 +185,9 @@ public void popMvPose()
         RenderSystem.getModelViewStack().popMatrix();
         RenderSystem.applyModelViewMatrix();
     }
+
+    public static double getAltSpeedFactor()
+    {
+        return Screen.hasAltDown() ? 5 : 1;
+    }
 }

src/main/java/com/ldtteam/blockui/mod/ClientEventSubscriber.java

@@ -12,7 +12,6 @@
 import com.ldtteam.blockui.mod.container.ContainerHook;
 import com.ldtteam.blockui.util.resloc.OutOfJarResourceLocation;
 import com.ldtteam.blockui.views.BOWindow;
-import com.ldtteam.common.util.BlockToItemHelper;
 import com.mojang.blaze3d.platform.InputConstants;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.gui.screens.Screen;
@@ -22,7 +21,6 @@
 import net.neoforged.bus.api.EventPriority;
 import net.neoforged.bus.api.SubscribeEvent;
 import net.neoforged.fml.ModList;
-import net.neoforged.neoforge.client.event.ClientPlayerNetworkEvent;
 import net.neoforged.neoforge.client.event.ClientTickEvent;
 import net.neoforged.neoforge.client.event.RenderGuiLayerEvent;
 import net.neoforged.neoforge.client.event.InputEvent.MouseScrollingEvent;
@@ -175,19 +173,4 @@ public static void renderOverlay(final RenderGuiLayerEvent.Pre event)
             event.setCanceled(true);
         }
     }
-
-    @SubscribeEvent
-    public static void onClientPlayerLoggingOut(final ClientPlayerNetworkEvent.LoggingOut event)
-    {
-        BlockToItemHelper.releaseFakeLevelInstance();
-    }
-
-    @SubscribeEvent
-    public static void onClientPlayerDimChange(final ClientPlayerNetworkEvent.Clone event)
-    {
-        if (event.getNewPlayer().level() != event.getOldPlayer().level())
-        {
-            BlockToItemHelper.releaseFakeLevelInstance();
-        }
-    }
 }

src/main/java/com/ldtteam/blockui/views/ScrollingView.java

@@ -1,5 +1,6 @@
 package com.ldtteam.blockui.views;
 
+import com.ldtteam.blockui.BOGuiGraphics;
 import com.ldtteam.blockui.Pane;
 import com.ldtteam.blockui.PaneParams;
 import com.ldtteam.blockui.controls.Scrollbar;
@@ -75,7 +76,7 @@ public void setSize(final int w, final int h)
     @Override
     public boolean scrollInput(final double horizontalWheel, final double verticalWheel, final double mx, final double my)
     {
-        return setScrollY(getScrollY() - verticalWheel);
+        return setScrollY(getScrollY() - verticalWheel * BOGuiGraphics.getAltSpeedFactor());
     }
 
     public ScrollingContainer getContainer()

src/main/java/com/ldtteam/blockui/views/ZoomDragView.java

@@ -233,8 +233,8 @@ public boolean onMouseDrag(final double startX, final double startY, final int s
         final boolean childResult = super.onMouseDrag(startX, startY, speed, calcRelativeX(x), calcRelativeY(y));
         if (!childResult && dragEnabled)
         {
-            setScrollX(scrollX - x * dragFactor);
-            setScrollY(scrollY - y * dragFactor);
+            setScrollX(scrollX - x * dragFactor * BOGuiGraphics.getAltSpeedFactor());
+            setScrollY(scrollY - y * dragFactor * BOGuiGraphics.getAltSpeedFactor());
             return true;
         }
         return childResult;
@@ -250,6 +250,7 @@ public boolean scrollInput(final double horizontalWheel, final double verticalWh
             final double childY = my - y;
             final double oldX = (childX + scrollX) / scale;
             final double oldY = (childY + scrollY) / scale;
+            final double zoomFactor = this.zoomFactor * BOGuiGraphics.getAltSpeedFactor();
             scale = verticalWheel < 0 ? scale / zoomFactor : scale * zoomFactor;
 
             // try to round if around whole number (cuz of text texture)

src/main/java/com/ldtteam/common/fakelevel/FakeChunk.java

@@ -53,10 +53,19 @@ public class FakeChunk extends LevelChunk
 {
     private final FakeLevel<?> fakeLevel;
 
+    // section cache
+    int lastY;
+    LevelChunkSection lastSection = null;
+
     public FakeChunk(final FakeLevel<?> worldIn, final int x, final int z)
     {
         super(worldIn, new ChunkPos(x, z));
         this.fakeLevel = worldIn;
+
+        // set itself to cache
+        fakeLevel.lastX = x;
+        fakeLevel.lastZ = z;
+        fakeLevel.lastChunk = this;
     }
 
     // ========================================
@@ -220,6 +229,10 @@ public LevelChunkSection[] getSections()
     @Override
     public LevelChunkSection getSection(int yIdx)
     {
+        if (lastY == yIdx && lastSection != null)
+        {
+            return lastSection;
+        }
         return new FakeLevelChunkSection(this, yIdx);
     }
 

src/main/java/com/ldtteam/common/fakelevel/FakeLevel.java

@@ -109,6 +109,10 @@ public class FakeLevel<SOURCE extends IFakeLevelBlockGetter> extends Level
      */
     protected BlockPos worldPos = BlockPos.ZERO;
 
+    // chunk cache
+    int lastX, lastZ;
+    ChunkAccess lastChunk = null;
+
     /**
      * @param levelSource     data source, also try to set block entities/entities collections
      * @param lightProvider   light source
@@ -131,7 +135,7 @@ public FakeLevel(final SOURCE levelSource,
             realLevel.registryAccess(),
             realLevel.dimensionTypeRegistration(),
             realLevel.getProfilerSupplier(),
-            true,
+            realLevel.isClientSide(),
             false,
             0,
             0);
@@ -158,6 +162,11 @@ public void setRealLevel(final Level realLevel)
             return;
         }
 
+        if (realLevel != null && realLevel.isClientSide != this.isClientSide)
+        {
+            throw new IllegalArgumentException("Received wrong sided realLevel - fakeLevel.isClientSide = " + this.isClientSide);
+        }
+
         this.realLevel = realLevel;
         ((FakeLevelData) this.getLevelData()).vanillaLevelData = realLevel == null ? null : realLevel.getLevelData();
     }
@@ -201,7 +210,7 @@ public BlockPos getWorldPos()
 
     /**
      * For better block entity handling in chunk methods. If set then {@link IFakeLevelBlockGetter#getBlockEntity(BlockPos)
-     * levelSource.getBlockEntity(BlockPos)} is not used
+     * levelSource.getBlockEntity(BlockPos)} is not used. Reset with empty collection
      * 
      * @param blockEntities all block entities, should be data equivalent to levelSource
      */
@@ -211,11 +220,11 @@ public void setBlockEntities(final Map<BlockPos, BlockEntity> blockEntities)
     }
 
     /**
-     * @param entities all entities, their level should be this fake level instance
+     * @param entities all entities, their level should be this fake level instance. Reset with empty collection
      */
     public void setEntities(final Collection<? extends Entity> entities)
     {
-        levelEntityGetter = FakeLevelEntityGetterAdapter.ofEntities(entities);
+        levelEntityGetter = entities.isEmpty() ? FakeLevelEntityGetterAdapter.EMPTY : FakeLevelEntityGetterAdapter.ofEntities(entities);
     }
 
     // ========================================
@@ -296,6 +305,10 @@ public BlockState getBlockState(final BlockPos pos)
     @Override
     public ChunkAccess getChunk(int x, int z, ChunkStatus requiredStatus, boolean nonnull)
     {
+        if (lastX == x && lastZ == z && lastChunk != null)
+        {
+            return lastChunk;
+        }
         return nonnull || hasChunk(x, z) ? new FakeChunk(this, x, z) : null;
     }
 
@@ -368,7 +381,7 @@ public boolean isInWorldBounds(final BlockPos pos)
     @Override
     public CrashReportCategory fillReportDetails(CrashReport report)
     {
-        CrashReportCategory crashreportcategory = report.addCategory("Structurize fake level");
+        CrashReportCategory crashreportcategory = report.addCategory("BlockUI fake level");
         levelSource.describeSelfInCrashReport(crashreportcategory);
         return crashreportcategory;
     }

src/main/java/com/ldtteam/common/fakelevel/FakeLevelChunkSection.java

@@ -30,6 +30,10 @@ public FakeLevelChunkSection(final FakeChunk fakeChunk, final int yIdx)
         super(null, null);
         this.fakeChunk = fakeChunk;
         this.yIdx = yIdx;
+
+        // set itself to cache
+        fakeChunk.lastY = yIdx;
+        fakeChunk.lastSection = this;
     }
 
     private BlockPos formGlobalPos(int x, int y, int z)

src/main/java/com/ldtteam/common/fakelevel/IFakeLevelBlockGetter.java

@@ -3,7 +3,6 @@
 import net.minecraft.CrashReportCategory;
 import net.minecraft.core.BlockPos;
 import net.minecraft.world.level.BlockGetter;
-import net.minecraft.world.level.block.entity.BlockEntity;
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.level.material.FluidState;
 import net.minecraft.world.level.material.Fluids;
@@ -126,40 +125,4 @@ default AABB getAABB()
     {
         return new AABB(getMinX(), getMinBuildHeight(), getMinZ(), getMaxX(), getMaxBuildHeight(), getMaxZ());
     }
-
-    public static class SingleBlockFakeLevelGetter implements IFakeLevelBlockGetter
-    {
-        public BlockState blockState = null;
-        public BlockEntity blockEntity = null;
-
-        @Override
-        public BlockEntity getBlockEntity(final BlockPos pos)
-        {
-            return blockEntity;
-        }
-
-        @Override
-        public BlockState getBlockState(final BlockPos pos)
-        {
-            return blockState;
-        }
-
-        @Override
-        public int getHeight()
-        {
-            return 1;
-        }
-
-        @Override
-        public int getSizeX()
-        {
-            return 1;
-        }
-
-        @Override
-        public int getSizeZ()
-        {
-            return 1;
-        }
-    }
 }