Better pattern tooltip

src/main/java/refinedstorage/RefinedStorageUtils.java

@@ -21,6 +21,10 @@ import org.apache.commons.lang3.ArrayUtils;
 import refinedstorage.api.storage.CompareFlags;
 import refinedstorage.item.ItemUpgrade;
 
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
 public final class RefinedStorageUtils {
     public static final String NBT_INVENTORY = "Inventory_%d";
     public static final String NBT_SLOT = "Slot";
@@ -265,4 +269,30 @@ public final class RefinedStorageUtils {
 
         return (int) multiplier;
     }
+
+    public static void combineMultipleItemsInTooltip(List<String> lines, ItemStack... stacks) {
+        Set<Integer> combinedIndices = new HashSet<Integer>();
+
+        for (int i = 0; i < stacks.length; ++i) {
+            if (!combinedIndices.contains(i)) {
+                String data = stacks[i].getDisplayName();
+
+                int amount = stacks[i].stackSize;
+
+                for (int j = i + 1; j < stacks.length; ++j) {
+                    if (RefinedStorageUtils.compareStack(stacks[i], stacks[j])) {
+                        amount += stacks[j].stackSize;
+
+                        combinedIndices.add(j);
+                    }
+                }
+
+                if (amount != 1) {
+                    data += " (" + amount + "x)";
+                }
+
+                lines.add(data);
+            }
+        }
+    }
 }

src/main/java/refinedstorage/item/ItemPattern.java

@@ -1,10 +1,14 @@
 package refinedstorage.item;
 
+import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.client.resources.I18n;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.nbt.NBTTagList;
+import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.common.util.Constants;
+import refinedstorage.RefinedStorageUtils;
 
 import java.util.List;
 
@@ -21,19 +25,15 @@ public class ItemPattern extends ItemBase {
     @Override
     public void addInformation(ItemStack pattern, EntityPlayer player, List list, boolean b) {
         if (isValid(pattern)) {
-            if (!isProcessing(pattern)) {
-                for (ItemStack output : getOutputs(pattern)) {
-                    list.add(output.getDisplayName());
-                }
-            } else {
-                for (ItemStack input : getInputs(pattern)) {
-                    list.add(input.getDisplayName());
-                }
+            if (GuiScreen.isShiftKeyDown() || isProcessing(pattern)) {
+                list.add(TextFormatting.YELLOW + I18n.format("misc.refinedstorage:pattern.inputs") + TextFormatting.RESET);
 
-                for (ItemStack output : getOutputs(pattern)) {
-                    list.add("-> " + output.getDisplayName());
-                }
+                RefinedStorageUtils.combineMultipleItemsInTooltip(list, getInputs(pattern));
+
+                list.add(TextFormatting.YELLOW + I18n.format("misc.refinedstorage:pattern.outputs") + TextFormatting.RESET);
             }
+
+            RefinedStorageUtils.combineMultipleItemsInTooltip(list, getOutputs(pattern));
         }
     }
 

src/main/resources/assets/refinedstorage/lang/en_US.lang

@@ -47,6 +47,9 @@ misc.refinedstorage:wireless_grid.tooltip.2=Z: %d
 misc.refinedstorage:wireless_grid.out_of_range=Controller out of range.
 misc.refinedstorage:wireless_grid.not_found=Controller not found.
 
+misc.refinedstorage:pattern.inputs=Inputs
+misc.refinedstorage:pattern.outputs=Outputs
+
 misc.refinedstorage:start=Start
 misc.refinedstorage:clear=Clear
 misc.refinedstorage:cancel_all=Cancel All