finished the pipe frame

src/main/java/de/ellpeck/prettypipes/Registry.java

@@ -70,6 +70,7 @@ public final class Registry {
     public static Capability<PipeNetwork> pipeNetworkCapability;
 
     public static Item wrenchItem;
+    public static Item pipeFrameItem;
 
     public static Block pipeBlock;
     public static TileEntityType<PipeTileEntity> pipeTileEntity;
@@ -95,7 +96,7 @@ public final class Registry {
         registry.registerAll(
                 wrenchItem = new WrenchItem().setRegistryName("wrench"),
                 new Item(new Item.Properties().group(GROUP)).setRegistryName("blank_module"),
-                new PipeFrameItem().setRegistryName("pipe_frame")
+                pipeFrameItem = new PipeFrameItem().setRegistryName("pipe_frame")
         );
         registry.registerAll(createTieredModule("extraction_module", ExtractionModuleItem::new));
         registry.registerAll(createTieredModule("filter_module", FilterModuleItem::new));

src/main/java/de/ellpeck/prettypipes/Utility.java

@@ -1,13 +1,18 @@
 package de.ellpeck.prettypipes;
 
+import net.minecraft.client.gui.screen.Screen;
+import net.minecraft.client.resources.I18n;
 import net.minecraft.inventory.InventoryHelper;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.text.*;
 import net.minecraft.world.World;
 import net.minecraftforge.items.IItemHandler;
 
+import java.util.List;
+
 public final class Utility {
 
     public static <T extends TileEntity> T getTileEntity(Class<T> type, World world, BlockPos pos) {
@@ -28,4 +33,14 @@ public final class Utility {
         BlockPos diff = pos.subtract(other);
         return Direction.getFacingFromVector(diff.getX(), diff.getY(), diff.getZ());
     }
+
+    public static void addTooltip(String name, List<ITextComponent> tooltip) {
+        if (Screen.hasShiftDown()) {
+            String[] content = I18n.format("info." + PrettyPipes.ID + "." + name).split("\n");
+            for (String s : content)
+                tooltip.add(new StringTextComponent(s).setStyle(new Style().setColor(TextFormatting.GRAY)));
+        } else {
+            tooltip.add(new TranslationTextComponent("info." + PrettyPipes.ID + ".shift").setStyle(new Style().setColor(TextFormatting.DARK_GRAY)));
+        }
+    }
 }

src/main/java/de/ellpeck/prettypipes/entities/PipeFrameEntity.java

@@ -1,20 +1,33 @@
 package de.ellpeck.prettypipes.entities;
 
+import de.ellpeck.prettypipes.Registry;
 import de.ellpeck.prettypipes.network.NetworkLocation;
 import de.ellpeck.prettypipes.network.PipeNetwork;
+import de.ellpeck.prettypipes.pipe.PipeBlock;
 import de.ellpeck.prettypipes.pipe.PipeTileEntity;
+import net.minecraft.block.BlockState;
+import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.item.ItemFrameEntity;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.FilledMapItem;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
 import net.minecraft.network.IPacket;
 import net.minecraft.network.datasync.DataParameter;
 import net.minecraft.network.datasync.DataSerializers;
 import net.minecraft.network.datasync.EntityDataManager;
+import net.minecraft.util.DamageSource;
 import net.minecraft.util.Direction;
+import net.minecraft.util.Hand;
+import net.minecraft.util.SoundEvents;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.GameRules;
 import net.minecraft.world.World;
+import net.minecraft.world.storage.MapData;
 import net.minecraftforge.fml.network.NetworkHooks;
 
+import javax.annotation.Nullable;
 import java.util.List;
 
 public class PipeFrameEntity extends ItemFrameEntity {
@@ -34,7 +47,7 @@ public class PipeFrameEntity extends ItemFrameEntity {
     @Override
     protected void registerData() {
         super.registerData();
-        this.dataManager.register(AMOUNT, 0);
+        this.dataManager.register(AMOUNT, -1);
     }
 
     @Override
@@ -45,20 +58,101 @@ public class PipeFrameEntity extends ItemFrameEntity {
         if (this.ticksExisted % 40 != 0)
             return;
         PipeNetwork network = PipeNetwork.get(this.world);
-        BlockPos hangingPos = this.getHangingPosition().offset(this.getHorizontalFacing().getOpposite());
-        BlockPos node = network.getNodeFromPipe(hangingPos);
-        if (node == null)
-            return;
+        BlockPos attached = getAttachedPipe(this.world, this.hangingPosition, this.facingDirection);
+        if (attached != null) {
+            BlockPos node = network.getNodeFromPipe(attached);
+            if (node != null) {
                 ItemStack stack = this.getDisplayedItem();
+                if (!stack.isEmpty()) {
                     List<NetworkLocation> items = network.getOrderedNetworkItems(node);
                     int amount = items.stream().mapToInt(i -> i.getItemAmount(stack)).sum();
                     this.dataManager.set(AMOUNT, amount);
+                    return;
+                }
+            }
+        }
+        this.dataManager.set(AMOUNT, -1);
+    }
+
+    @Override
+    public boolean onValidSurface() {
+        return super.onValidSurface() && canPlace(this.world, this.hangingPosition, this.facingDirection);
+    }
+
+    private static BlockPos getAttachedPipe(World world, BlockPos pos, Direction direction) {
+        for (int i = 1; i <= 2; i++) {
+            BlockPos offset = pos.offset(direction.getOpposite(), i);
+            BlockState state = world.getBlockState(offset);
+            if (state.getBlock() instanceof PipeBlock)
+                return offset;
+        }
+        return null;
+    }
+
+    public static boolean canPlace(World world, BlockPos pos, Direction direction) {
+        return getAttachedPipe(world, pos, direction) != null;
     }
 
     public int getAmount() {
         return this.dataManager.get(AMOUNT);
     }
 
+    @Override
+    public boolean attackEntityFrom(DamageSource source, float amount) {
+        if (this.isInvulnerableTo(source)) {
+            return false;
+        } else if (!source.isExplosion() && !this.getDisplayedItem().isEmpty()) {
+            if (!this.world.isRemote) {
+                this.dropItemOrSelf(source.getTrueSource(), false);
+                this.playSound(SoundEvents.ENTITY_ITEM_FRAME_REMOVE_ITEM, 1.0F, 1.0F);
+            }
+
+            return true;
+        } else {
+            return super.attackEntityFrom(source, amount);
+        }
+    }
+
+    @Override
+    public void onBroken(@Nullable Entity brokenEntity) {
+        this.playSound(SoundEvents.ENTITY_ITEM_FRAME_BREAK, 1.0F, 1.0F);
+        this.dropItemOrSelf(brokenEntity, true);
+    }
+
+    private void dropItemOrSelf(@Nullable Entity entityIn, boolean b) {
+        if (!this.world.getGameRules().getBoolean(GameRules.DO_ENTITY_DROPS)) {
+            if (entityIn == null)
+                this.getDisplayedItem().setItemFrame(null);
+        } else {
+            ItemStack itemstack = this.getDisplayedItem();
+            this.setDisplayedItem(ItemStack.EMPTY);
+            if (entityIn instanceof PlayerEntity) {
+                PlayerEntity playerentity = (PlayerEntity) entityIn;
+                if (playerentity.abilities.isCreativeMode) {
+                    itemstack.setItemFrame(null);
+                    return;
+                }
+            }
+
+            if (b)
+                this.entityDropItem(Registry.pipeFrameItem);
+
+            if (!itemstack.isEmpty()) {
+                itemstack = itemstack.copy();
+                itemstack.setItemFrame(null);
+                this.entityDropItem(itemstack);
+            }
+
+        }
+    }
+
+    @Override
+    public boolean processInitialInteract(PlayerEntity player, Hand hand) {
+        if (this.getDisplayedItem().isEmpty())
+            return super.processInitialInteract(player, hand);
+        return false;
+    }
+
     @Override
     public IPacket<?> createSpawnPacket() {
         return NetworkHooks.getEntitySpawningPacket(this);

src/main/java/de/ellpeck/prettypipes/entities/PipeFrameRenderer.java

@@ -21,8 +21,6 @@ public class PipeFrameRenderer extends ItemFrameRenderer {
     @Override
     public void render(ItemFrameEntity entityIn, float entityYaw, float partialTicks, MatrixStack matrixStackIn, IRenderTypeBuffer bufferIn, int packedLightIn) {
         super.render(entityIn, entityYaw, partialTicks, matrixStackIn, bufferIn, packedLightIn);
-        if (entityIn.getDisplayedItem().isEmpty())
-            return;
         matrixStackIn.push();
         Direction direction = entityIn.getHorizontalFacing();
         Vec3d vec3d = this.getRenderOffset(entityIn, partialTicks);
@@ -33,10 +31,10 @@ public class PipeFrameRenderer extends ItemFrameRenderer {
 
         FontRenderer font = this.getFontRendererFromRenderManager();
         int amount = ((PipeFrameEntity) entityIn).getAmount();
-        String ammountStrg = String.valueOf(amount);
+        String ammountStrg = amount < 0 ? "?" : String.valueOf(amount);
         float x = 0.5F - font.getStringWidth(ammountStrg) / 2F;
         Matrix4f matrix4f = matrixStackIn.getLast().getPositionMatrix();
-        matrixStackIn.translate(0, -0.13F, 0);
+        matrixStackIn.translate(0, 0.285F, 0);
         matrixStackIn.scale(-0.02F, -0.02F, 0.02F);
         font.renderString(ammountStrg, x, 0, 0xFFFFFF, true, matrix4f, bufferIn, false, 0, packedLightIn);
 

src/main/java/de/ellpeck/prettypipes/items/ModuleItem.java

@@ -2,6 +2,7 @@ package de.ellpeck.prettypipes.items;
 
 import de.ellpeck.prettypipes.PrettyPipes;
 import de.ellpeck.prettypipes.Registry;
+import de.ellpeck.prettypipes.Utility;
 import de.ellpeck.prettypipes.pipe.modules.containers.AbstractPipeContainer;
 import de.ellpeck.prettypipes.pipe.PipeTileEntity;
 import net.minecraft.client.gui.screen.Screen;
@@ -33,13 +34,7 @@ public abstract class ModuleItem extends Item implements IModule {
     @OnlyIn(Dist.CLIENT)
     public void addInformation(ItemStack stack, @Nullable World worldIn, List<ITextComponent> tooltip, ITooltipFlag flagIn) {
         super.addInformation(stack, worldIn, tooltip, flagIn);
-        if (Screen.hasShiftDown()) {
-            String[] content = I18n.format("info." + PrettyPipes.ID + "." + this.name).split("\n");
-            for (String s : content)
-                tooltip.add(new StringTextComponent(s).setStyle(new Style().setColor(TextFormatting.GRAY)));
-        } else {
-            tooltip.add(new TranslationTextComponent("info." + PrettyPipes.ID + ".shift").setStyle(new Style().setColor(TextFormatting.DARK_GRAY)));
-        }
+        Utility.addTooltip(this.name, tooltip);
     }
 
     @Override

src/main/java/de/ellpeck/prettypipes/items/PipeFrameItem.java

@@ -1,9 +1,11 @@
 package de.ellpeck.prettypipes.items;
 
 import de.ellpeck.prettypipes.Registry;
+import de.ellpeck.prettypipes.Utility;
 import de.ellpeck.prettypipes.entities.PipeFrameEntity;
 import de.ellpeck.prettypipes.pipe.PipeBlock;
 import net.minecraft.block.BlockState;
+import net.minecraft.client.util.ITooltipFlag;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.item.HangingEntity;
 import net.minecraft.entity.item.ItemFrameEntity;
@@ -16,8 +18,12 @@ import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.util.ActionResultType;
 import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.text.ITextComponent;
 import net.minecraft.world.World;
 
+import javax.annotation.Nullable;
+import java.util.List;
+
 public class PipeFrameItem extends Item {
     public PipeFrameItem() {
         super(new Properties().group(Registry.GROUP));
@@ -57,9 +63,12 @@ public class PipeFrameItem extends Item {
     }
 
     protected boolean canPlace(PlayerEntity playerIn, Direction directionIn, ItemStack itemStackIn, BlockPos posIn) {
-        BlockState state = playerIn.world.getBlockState(posIn.offset(directionIn.getOpposite()));
-        if (!(state.getBlock() instanceof PipeBlock))
-            return false;
-        return !directionIn.getAxis().isVertical() && playerIn.canPlayerEdit(posIn, directionIn, itemStackIn);
+        return !directionIn.getAxis().isVertical() && playerIn.canPlayerEdit(posIn, directionIn, itemStackIn) && PipeFrameEntity.canPlace(playerIn.world, posIn, directionIn);
+    }
+
+    @Override
+    public void addInformation(ItemStack stack, @Nullable World worldIn, List<ITextComponent> tooltip, ITooltipFlag flagIn) {
+        super.addInformation(stack, worldIn, tooltip, flagIn);
+        Utility.addTooltip(this.getRegistryName().getPath(), tooltip);
     }
 }

src/main/resources/assets/prettypipes/lang/en_us.json

@@ -1,6 +1,8 @@
 {
     "item.prettypipes.wrench": "Pipe Wrench",
     "item.prettypipes.blank_module": "Blank Module",
+    "item.prettypipes.pipe_frame": "Pipe Frame",
+    "info.prettypipes.pipe_frame": "Attach to a pipe or pipe-adjacent block\nShows amount of an item in the pipe's network",
     "item.prettypipes.low_extraction_module": "Low Extraction Module",
     "item.prettypipes.medium_extraction_module": "Medium Extraction Module",
     "item.prettypipes.high_extraction_module": "High Extraction Module",

src/main/resources/assets/prettypipes/models/item/pipe_frame.json

@@ -0,0 +1,6 @@
+{
+    "parent": "item/generated",
+    "textures": {
+        "layer0": "prettypipes:item/pipe_frame"
+    }
+}

src/main/resources/data/prettypipes/recipes/pipe_frame.json

@@ -0,0 +1,17 @@
+{
+    "type": "minecraft:crafting_shapeless",
+    "ingredients": [
+        {
+            "item": "minecraft:item_frame"
+        },
+        {
+            "item": "prettypipes:pipe"
+        },
+        {
+            "item": "minecraft:redstone"
+        }
+    ],
+    "result": {
+        "item": "prettypipes:pipe_frame"
+    }
+}