Add getResultStacks/getAuxiliaryStacks to IRecipeHandler (#1105)

src/main/java/codechicken/nei/FavoriteRecipes.java

@@ -9,7 +9,6 @@ import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -33,7 +32,6 @@ import codechicken.nei.api.API;
 import codechicken.nei.recipe.GuiCraftingRecipe;
 import codechicken.nei.recipe.GuiRecipeTab;
 import codechicken.nei.recipe.ICraftingHandler;
-import codechicken.nei.recipe.IRecipeHandler;
 import codechicken.nei.recipe.Recipe.RecipeId;
 import codechicken.nei.recipe.RecipeHandlerRef;
 import codechicken.nei.recipe.StackInfo;
@@ -94,7 +92,7 @@ public class FavoriteRecipes {
                 for (int i = 0; i < handler.numRecipes(); i++) {
                     RecipeHandlerRef ref = null;
 
-                    for (PositionedStack result : getOutputs(handler, i)) {
+                    for (PositionedStack result : handler.getResultStacks(i)) {
                         ItemStack stack = StackInfo.getItemStackWithMinimumDamage(result.items);
                         final FastKey key = new FastKey(stack);
 
@@ -129,11 +127,6 @@ public class FavoriteRecipes {
             updateSubsetVisibility();
         }
 
-        protected List<PositionedStack> getOutputs(IRecipeHandler handler, int recipeIndex) {
-            final PositionedStack pStackResult = handler.getResultStack(recipeIndex);
-            return pStackResult != null ? Collections.singletonList(pStackResult) : handler.getOtherStacks(recipeIndex);
-        }
-
     };
 
     public static final String FAVORITE_ITEM = "FavoriteItem";

src/main/java/codechicken/nei/ItemCraftablesPanel.java

@@ -13,7 +13,6 @@ import java.util.stream.IntStream;
 import net.minecraft.client.gui.inventory.GuiContainer;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraftforge.fluids.FluidContainerRegistry;
 
 import codechicken.lib.vec.Rectangle4i;
 import codechicken.nei.ItemsGrid.ItemsGridSlot;
@@ -24,6 +23,7 @@ import codechicken.nei.recipe.GuiCraftingRecipe;
 import codechicken.nei.recipe.GuiRecipe;
 import codechicken.nei.recipe.ICraftingHandler;
 import codechicken.nei.recipe.IRecipeHandler;
+import codechicken.nei.recipe.Recipe;
 import codechicken.nei.recipe.Recipe.RecipeId;
 import codechicken.nei.recipe.RecipeInfo;
 import codechicken.nei.recipe.StackInfo;
@@ -378,48 +378,19 @@ public class ItemCraftablesPanel
     }
 
     private static ItemStack getCheapResultItem(IRecipeHandler handler, int recipeIndex) {
-        final PositionedStack resultStack = handler.getResultStack(recipeIndex);
-
-        if (resultStack != null) {
-            return resultStack.item;
-        }
-
-        final List<PositionedStack> otherStacks = handler.getOtherStacks(recipeIndex);
-
-        for (PositionedStack otherStack : otherStacks) {
-            if (!FluidContainerRegistry.isContainer(otherStack.items[0])
-                    || StackInfo.getFluid(otherStack.items[0]) != null) {
-                return otherStack.item;
-            }
-        }
-
-        return otherStacks.isEmpty() ? null : otherStacks.get(0).item;
+        final PositionedStack result = Recipe
+                .getMainResult(handler.getResultStacks(recipeIndex), pStack -> pStack.items[0]);
+        return result != null ? result.item : null;
     }
 
     private static ItemStack getCheapResult(IRecipeHandler handler, int recipeIndex) {
-        final PositionedStack resultStack = handler.getResultStack(recipeIndex);
-        final List<PositionedStack> results = resultStack != null ? Collections.singletonList(resultStack)
-                : handler.getOtherStacks(recipeIndex);
+        final List<PositionedStack> results = handler.getResultStacks(recipeIndex);
 
         if (results.isEmpty()) {
             return null;
         }
 
-        ItemStack stack = null;
-
-        if (results.size() > 1) {
-            for (PositionedStack result : results) {
-                if (!FluidContainerRegistry.isContainer(result.item) || StackInfo.getFluid(result.item) != null) {
-                    stack = result.item;
-                    break;
-                }
-            }
-        }
-
-        if (stack == null) {
-            stack = results.get(0).item;
-        }
-
+        final ItemStack stack = Recipe.getMainResult(results, pStack -> pStack.items[0]).item;
         int stackSize = 0;
 
         for (PositionedStack result : results) {

src/main/java/codechicken/nei/PresetsList.java

@@ -89,19 +89,19 @@ public class PresetsList {
                 return false;
             }
 
-            final PositionedStack result = handler.getResultStack(recipeIndex);
+            final List<PositionedStack> outputs = handler.getResultStacks(recipeIndex);
 
-            if (result != null && matchPositionedStack(result)) {
+            if (matchPositionedStack(outputs, true)) {
                 return true;
             }
 
-            final List<PositionedStack> others = handler.getOtherStacks(recipeIndex);
+            final List<PositionedStack> auxiliaries = handler.getAuxiliaryStacks(recipeIndex);
 
-            if (!others.isEmpty() && matchPositionedStack(others, true)) {
+            if (matchPositionedStack(auxiliaries, true)) {
                 return true;
             }
 
-            return result == null && others.isEmpty();
+            return outputs.isEmpty() && auxiliaries.isEmpty();
         }
 
         private boolean matchPositionedStack(List<PositionedStack> items, boolean dir) {

src/main/java/codechicken/nei/RecipeSearchField.java

@@ -24,7 +24,13 @@ public abstract class RecipeSearchField extends TextField implements ItemFilterP
         field.setMaxStringLength(maxSearchLength);
         field.setCursorPositionZero();
         field.setSkipRecipeTokens(true);
-        ((SearchTextFormatter) field.getFormatter()).setContextToken("<>");
+        field.setFormatter(new SearchTextFormatter(SearchField.searchParser) {
+
+            @Override
+            protected String getContextToken() {
+                return this.searchParser.getRecipeContextTokens();
+            }
+        });
         this.field = field;
     }
 

src/main/java/codechicken/nei/SearchTextFormatter.java

@@ -20,6 +20,10 @@ public class SearchTextFormatter implements TextFormatter {
         this.contextToken = contextToken;
     }
 
+    protected String getContextToken() {
+        return this.contextToken;
+    }
+
     @Override
     public String format(String text) {
         final int patternMode = NEIClientConfig.getIntSetting("inventory.search.patternMode");
@@ -32,13 +36,14 @@ public class SearchTextFormatter implements TextFormatter {
             return SearchExpressionUtils.visitRecipeSearchExpression(text, visitor);
         } else {
             final StringBuilder formattedText = new StringBuilder();
+            final String contextToken = getContextToken();
 
             for (String[] orQuery : searchParser.splitByDelimiters(text, "|", false)) {
                 final String filterText = orQuery[1];
 
                 formattedText.append(SearchExpressionUtils.HIGHLIGHTS.OR + orQuery[0]);
 
-                for (String[] contextPart : searchParser.splitByDelimiters(filterText, this.contextToken, false)) {
+                for (String[] contextPart : searchParser.splitByDelimiters(filterText, contextToken, false)) {
 
                     if (!contextPart[0].isEmpty()) {
                         formattedText.append(
@@ -74,7 +79,11 @@ public class SearchTextFormatter implements TextFormatter {
                             formattedText.append(SearchExpressionUtils.HIGHLIGHTS.QUOTED + "\"");
                         }
 
-                        if (!token.rawText.isEmpty()) {
+                        if (patternMode == 1 && !token.quotes && isRegexToken(token.rawText)) {
+                            formattedText.append(SearchExpressionUtils.HIGHLIGHTS.REGEX + token.rawText.substring(0, 2))
+                                    .append(tokenColor + token.rawText.substring(2, token.rawText.length() - 1))
+                                    .append(SearchExpressionUtils.HIGHLIGHTS.REGEX + "/");
+                        } else if (!token.rawText.isEmpty()) {
                             formattedText.append(tokenColor + token.rawText);
                         }
 
@@ -93,4 +102,8 @@ public class SearchTextFormatter implements TextFormatter {
             return formattedText.toString();
         }
     }
+
+    private static boolean isRegexToken(String search) {
+        return search.length() >= 3 && search.regionMatches(true, 0, "r/", 0, 2) && search.endsWith("/");
+    }
 }

src/main/java/codechicken/nei/SearchTokenParser.java

@@ -194,6 +194,7 @@ public class SearchTokenParser {
         if (patternMode != 3) {
             return this.filtersCache.computeIfAbsent(skipRecipeTokens + ":" + filterText, _t -> {
                 final List<ItemFilter> searchTokens = new ArrayList<>();
+                final String contextTokens = skipRecipeTokens ? getRecipeContextTokens() : "";
 
                 for (String[] subQuery : splitByDelimiters(filterText, "|", false)) {
 
@@ -203,9 +204,10 @@ public class SearchTokenParser {
 
                     final List<ItemFilter> tokens = new ArrayList<>();
 
-                    for (String[] contextQuery : splitByDelimiters(subQuery[1], skipRecipeTokens ? "<>" : "", false)) {
+                    for (String[] contextQuery : splitByDelimiters(subQuery[1], contextTokens, false)) {
 
-                        if (contextQuery[1].isEmpty() || contextQuery[0].startsWith(">")) {
+                        if (contextQuery[1].isEmpty() || contextQuery[0].startsWith(">")
+                                || contextQuery[0].startsWith("^")) {
                             continue;
                         }
 
@@ -277,7 +279,7 @@ public class SearchTokenParser {
 
                     final List<IRecipeFilter> contextList = new ArrayList<>();
 
-                    for (String[] contextQuery : splitByDelimiters(orQueryPart[1], "<>", false)) {
+                    for (String[] contextQuery : splitByDelimiters(orQueryPart[1], getRecipeContextTokens(), false)) {
 
                         if (contextQuery[1].isEmpty()) {
                             continue;
@@ -436,7 +438,9 @@ public class SearchTokenParser {
 
         final List<String[]> tokens = new ArrayList<>();
         final int length = input.length();
+        final boolean regexTokens = NEIClientConfig.getIntSetting("inventory.search.patternMode") == 1;
         boolean insideQuotes = false;
+        boolean insideRegex = false;
         String token = "";
         int lastEnd = 0;
         int index = 0;
@@ -444,6 +448,15 @@ public class SearchTokenParser {
         while (index < length) {
             final char ch = input.charAt(index);
 
+            if (insideRegex) {
+                if (ch == '/' && input.charAt(index - 1) != '\\') {
+                    insideRegex = false;
+                }
+
+                index++;
+                continue;
+            }
+
             if (!insideQuotes && delimiters.indexOf(ch) >= 0
                     && (!space || index == 0 || input.charAt(index - 1) == ' ' || lastEnd == index)) {
 
@@ -464,6 +477,9 @@ public class SearchTokenParser {
 
             if (ch == '"' && (index == 0 || input.charAt(index - 1) != '\\')) {
                 insideQuotes = !insideQuotes;
+            } else if (regexTokens && !insideQuotes && isRegexStart(input, index)) {
+                insideRegex = true;
+                index++;
             }
 
             index++;
@@ -474,6 +490,12 @@ public class SearchTokenParser {
         return tokens;
     }
 
+    private static boolean isRegexStart(String input, int index) {
+        return Character.toLowerCase(input.charAt(index)) == 'r' && index + 1 < input.length()
+                && input.charAt(index + 1) == '/'
+                && (index == 0 || !Character.isLetterOrDigit(input.charAt(index - 1)));
+    }
+
     public String getPrefixes() {
         if (this.prefixes == null) {
             final StringBuilder builder = new StringBuilder();
@@ -490,6 +512,11 @@ public class SearchTokenParser {
         return this.prefixes;
     }
 
+    public String getRecipeContextTokens() {
+        // '^' is the start anchor and the negated class in regex mode
+        return NEIClientConfig.getIntSetting("inventory.search.patternMode") == 2 ? "<>" : "<>^";
+    }
+
     public char getRedefinedPrefix(char prefix) {
         return this.prefixRedefinitions.getOrDefault(prefix, prefix);
     }

src/main/java/codechicken/nei/filter/AllOthersRecipeFilter.java

@@ -1,44 +0,0 @@
-package codechicken.nei.filter;
-
-import net.minecraft.item.ItemStack;
-
-import codechicken.nei.PositionedStack;
-import codechicken.nei.api.IRecipeFilter;
-import codechicken.nei.api.ItemFilter;
-import codechicken.nei.recipe.IRecipeHandler;
-
-public class AllOthersRecipeFilter implements IRecipeFilter {
-
-    private final ItemFilter filter;
-
-    public AllOthersRecipeFilter(ItemFilter filter) {
-        this.filter = filter;
-    }
-
-    @Override
-    public boolean matches(IRecipeHandler handler, int recipeIndex) {
-
-        for (PositionedStack pStack : handler.getOtherStacks(recipeIndex)) {
-            if (!match(pStack)) {
-                return false;
-            }
-        }
-
-        return true;
-    }
-
-    protected boolean match(PositionedStack pStack) {
-        if (pStack == null) {
-            return false;
-        }
-
-        for (ItemStack stack : pStack.items) {
-            if (filter.matches(stack)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-}

src/main/java/codechicken/nei/filter/AnyOthersRecipeFilter.java

@@ -1,44 +0,0 @@
-package codechicken.nei.filter;
-
-import net.minecraft.item.ItemStack;
-
-import codechicken.nei.PositionedStack;
-import codechicken.nei.api.IRecipeFilter;
-import codechicken.nei.api.ItemFilter;
-import codechicken.nei.recipe.IRecipeHandler;
-
-public class AnyOthersRecipeFilter implements IRecipeFilter {
-
-    private final ItemFilter filter;
-
-    public AnyOthersRecipeFilter(ItemFilter filter) {
-        this.filter = filter;
-    }
-
-    @Override
-    public boolean matches(IRecipeHandler handler, int recipeIndex) {
-
-        for (PositionedStack pStack : handler.getOtherStacks(recipeIndex)) {
-            if (match(pStack)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    protected boolean match(PositionedStack pStack) {
-        if (pStack == null) {
-            return false;
-        }
-
-        for (ItemStack stack : pStack.items) {
-            if (filter.matches(stack)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-}

src/main/java/codechicken/nei/filter/RecipeFilter.java

@@ -16,7 +16,8 @@ public class RecipeFilter implements IRecipeFilter {
 
         ANY,
         INPUT,
-        OUTPUT;
+        OUTPUT,
+        AUXILIARY;
 
         public static FilterContext fromChar(char c) {
             switch (c) {
@@ -24,6 +25,8 @@ public class RecipeFilter implements IRecipeFilter {
                     return INPUT;
                 case '>':
                     return OUTPUT;
+                case '^':
+                    return AUXILIARY;
                 default:
                     return ANY;
             }
@@ -48,17 +51,14 @@ public class RecipeFilter implements IRecipeFilter {
             return this.anyMatch;
         }
 
-        if (this.context == FilterContext.ANY || this.context == FilterContext.OUTPUT) {
-            final PositionedStack result = handler.getResultStack(recipeIndex);
-
-            if (result != null && matchPositionedStack(result) == this.anyMatch) {
-                return this.anyMatch;
-            }
-
-            if (matchPositionedStack(handler.getOtherStacks(recipeIndex), this.anyMatch)) {
-                return this.anyMatch;
-            }
+        if ((this.context == FilterContext.ANY || this.context == FilterContext.OUTPUT)
+                && matchPositionedStack(handler.getResultStacks(recipeIndex), this.anyMatch)) {
+            return this.anyMatch;
+        }
 
+        if ((this.context == FilterContext.ANY || this.context == FilterContext.AUXILIARY)
+                && matchPositionedStack(handler.getAuxiliaryStacks(recipeIndex), this.anyMatch)) {
+            return this.anyMatch;
         }
 
         return !this.anyMatch;

src/main/java/codechicken/nei/recipe/GuiRecipe.java

@@ -200,6 +200,22 @@ public abstract class GuiRecipe<H extends IRecipeHandler> extends GuiContainer i
                                 "recipe.search.tooltip.output",
                                 SearchExpressionUtils.HIGHLIGHTS.RECIPE + ">"));
 
+                final int patternMode = NEIClientConfig.getIntSetting("inventory.search.patternMode");
+
+                if (patternMode != 2) {
+                    tooltip.add(
+                            NEIClientUtils.translate(
+                                    "recipe.search.tooltip.auxiliary",
+                                    SearchExpressionUtils.HIGHLIGHTS.RECIPE + "^"));
+                }
+
+                if (patternMode == 3) {
+                    tooltip.add(
+                            NEIClientUtils.translate(
+                                    "recipe.search.tooltip.all",
+                                    SearchExpressionUtils.HIGHLIGHTS.RECIPE + "<&"));
+                }
+
                 for (ISearchParserProvider provider : SearchField.searchParser.getProviders()) {
                     if (provider.getSearchMode() == SearchMode.PREFIX) {
                         addPrefixTooltip(tooltip, provider);
@@ -222,6 +238,14 @@ public abstract class GuiRecipe<H extends IRecipeHandler> extends GuiContainer i
                                 "recipe.search.tooltip.exact",
                                 SearchExpressionUtils.HIGHLIGHTS.QUOTED + "\"",
                                 SearchExpressionUtils.HIGHLIGHTS.QUOTED + "\""));
+
+                if (patternMode == 1 || patternMode == 3) {
+                    tooltip.add(
+                            NEIClientUtils.translate(
+                                    "recipe.search.tooltip.regex",
+                                    SearchExpressionUtils.HIGHLIGHTS.REGEX + "r/",
+                                    SearchExpressionUtils.HIGHLIGHTS.REGEX + "/"));
+                }
             } else {
                 tooltip.add(NEIClientUtils.translate("recipe.search.tooltip.shift"));
             }

src/main/java/codechicken/nei/recipe/IRecipeHandler.java

@@ -1,5 +1,6 @@
 package codechicken.nei.recipe;
 
+import java.util.Collections;
 import java.util.List;
 
 import net.minecraft.client.gui.inventory.GuiContainer;
@@ -77,19 +78,48 @@ public interface IRecipeHandler {
     List<PositionedStack> getIngredientStacks(int recipe);
 
     /**
+     * Callers should read {@link #getResultStacks(int)} and {@link #getAuxiliaryStacks(int)} instead.
      *
      * @param recipe The recipe index to get items for.
-     * @return A list of the other {@link PositionedStack}s in this recipe relative to the top left corner of your
-     *         recipe drawing space. For example fuel in furnaces.
+     * @return The fuel or catalysts when {@link #getResultStack(int)} is present, otherwise all the results of the
+     *         recipe. Relative to the top left corner of your recipe drawing space.
      */
-    List<PositionedStack> getOtherStacks(int recipe);
+    default List<PositionedStack> getOtherStacks(int recipe) {
+        return Collections.emptyList();
+    }
 
     /**
+     * Callers should read {@link #getResultStacks(int)} instead.
      *
      * @param recipe The recipe index to get the result for.
-     * @return The recipe result {@link PositionedStack} relative to the top left corner of your recipe drawing space.
+     * @return The single result, or {@code null} when the recipe has several results and returns them from
+     *         {@link #getOtherStacks(int)}. Relative to the top left corner of your recipe drawing space.
      */
-    PositionedStack getResultStack(int recipe);
+    default PositionedStack getResultStack(int recipe) {
+        return null;
+    }
+
+    /**
+     * Built from {@link #getResultStack(int)} and {@link #getOtherStacks(int)}. Don't override it, return the results
+     * from those methods so mods that still read them see the same results.
+     *
+     * @return The results: the result stack when present, otherwise the other stacks.
+     */
+    default List<PositionedStack> getResultStacks(int recipe) {
+        final PositionedStack result = getResultStack(recipe);
+        return result != null ? Collections.singletonList(result) : getOtherStacks(recipe);
+    }
+
+    /**
+     * Override it only when the recipe has several results and also fuel or catalysts: the results then go to
+     * {@link #getOtherStacks(int)} and the catalysts can't be returned from the old methods.
+     *
+     * @return The stacks that are neither ingredients nor results (fuel, catalysts): the other stacks when a result
+     *         stack is present.
+     */
+    default List<PositionedStack> getAuxiliaryStacks(int recipe) {
+        return getResultStack(recipe) != null ? getOtherStacks(recipe) : Collections.emptyList();
+    }
 
     /**
      * @param recipe The recipe index to get the group id for.

src/main/java/codechicken/nei/recipe/Recipe.java

@@ -7,6 +7,7 @@ import java.util.Comparator;
 import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
 import java.util.stream.Collectors;
 
 import net.minecraft.item.Item;
@@ -65,19 +66,11 @@ public class Recipe {
 
         public static RecipeId of(IRecipeHandler handler, int recipeIndex, List<PositionedStack> ingredients) {
             final String handlerName = GuiRecipeTab.getHandlerInfo(handler).getHandlerName();
-            PositionedStack pStackResult = handler.getResultStack(recipeIndex);
+            final PositionedStack result = getMainResult(
+                    handler.getResultStacks(recipeIndex),
+                    pStack -> pStack.items[0]);
 
-            if (pStackResult == null) {
-                for (PositionedStack otherStack : handler.getOtherStacks(recipeIndex)) {
-                    if (!FluidContainerRegistry.isContainer(otherStack.items[0])
-                            || StackInfo.getFluid(otherStack.items[0]) != null) {
-                        pStackResult = otherStack;
-                        break;
-                    }
-                }
-            }
-
-            return new RecipeId(extractItem(pStackResult), handlerName, extractIngredients(ingredients));
+            return new RecipeId(extractItem(result), handlerName, extractIngredients(ingredients));
         }
 
         public static RecipeId of(JsonObject json) {
@@ -404,12 +397,8 @@ public class Recipe {
             ingredients.add(RecipeIngredient.of(positionedStack));
         }
 
-        if (handler.getResultStack(recipeIndex) != null) {
-            results.add(RecipeIngredient.of(handler.getResultStack(recipeIndex)));
-        } else {
-            for (PositionedStack positionedStack : handler.getOtherStacks(recipeIndex)) {
-                results.add(RecipeIngredient.of(positionedStack));
-            }
+        for (PositionedStack positionedStack : handler.getResultStacks(recipeIndex)) {
+            results.add(RecipeIngredient.of(positionedStack));
         }
 
         return new Recipe(handlerName, ingredients, results);
@@ -494,18 +483,8 @@ public class Recipe {
             return null;
         }
 
-        if (stack == null && this.results.length > 1) {
-            for (RecipeIngredient ingr : this.results) {
-                if (!FluidContainerRegistry.isContainer(ingr.getItemStack())
-                        || StackInfo.getFluid(ingr.getItemStack()) != null) {
-                    stack = ingr.getItemStack();
-                    break;
-                }
-            }
-        }
-
         if (stack == null) {
-            stack = this.results[0].getItemStack();
+            stack = getMainResult(getResults(), RecipeIngredient::getItemStack).getItemStack();
         }
 
         int stackSize = 0;
@@ -519,6 +498,19 @@ public class Recipe {
         return StackInfo.withAmount(stack, stackSize);
     }
 
+    public static <T> T getMainResult(List<T> results, Function<T, ItemStack> stackOf) {
+
+        for (T result : results) {
+            final ItemStack stack = stackOf.apply(result);
+
+            if (!FluidContainerRegistry.isContainer(stack) || StackInfo.getFluid(stack) != null) {
+                return result;
+            }
+        }
+
+        return results.isEmpty() ? null : results.get(0);
+    }
+
     public RecipeId getRecipeId() {
 
         if (this.recipeId == null) {

src/main/java/codechicken/nei/recipe/TemplateRecipeHandler.java

@@ -4,6 +4,7 @@ import java.awt.Point;
 import java.awt.Rectangle;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
@@ -176,6 +177,16 @@ public abstract class TemplateRecipeHandler implements ICraftingHandler, IUsageH
             return null;
         }
 
+        /**
+         * Read only when {@link #getResult()} is {@code null} and {@link #getOtherStacks()} returns the results, see
+         * {@link IRecipeHandler#getAuxiliaryStacks(int)}.
+         *
+         * @return The fuel or catalysts of a recipe with several results.
+         */
+        public List<PositionedStack> getAuxiliaries() {
+            return Collections.emptyList();
+        }
+
         @Deprecated
         public List<PositionedStack> getCycledIngredients(int cycle, List<PositionedStack> ingredients) {
             return ingredients;
@@ -641,6 +652,16 @@ public abstract class TemplateRecipeHandler implements ICraftingHandler, IUsageH
         return arecipes.get(recipe).getOtherStacks();
     }
 
+    @Override
+    public List<PositionedStack> getAuxiliaryStacks(int recipe) {
+        // goes through the handler methods, subclasses may override them instead of the cached recipe ones
+        if (getResultStack(recipe) != null) {
+            return getOtherStacks(recipe);
+        }
+
+        return arecipes.get(recipe).getAuxiliaries();
+    }
+
     public void onUpdate() {
         cycleticks++;
     }

src/main/java/codechicken/nei/recipe/widget/RecipeGroup.java

@@ -225,15 +225,10 @@ public class RecipeGroup {
 
     protected MemberStacks loadStacks(int member) {
         final int recipeIndex = getRecipeIndex(member);
-        final List<PositionedStack> inputs = new ArrayList<>(this.handler.getIngredientStacks(recipeIndex));
-        final PositionedStack pStackResult = this.handler.getResultStack(recipeIndex);
-        final List<PositionedStack> others = new ArrayList<>(this.handler.getOtherStacks(recipeIndex));
-
-        if (pStackResult != null) {
-            return new MemberStacks(inputs, Collections.singletonList(pStackResult), others);
-        }
-
-        return new MemberStacks(inputs, others, Collections.emptyList());
+        return new MemberStacks(
+                new ArrayList<>(this.handler.getIngredientStacks(recipeIndex)),
+                new ArrayList<>(this.handler.getResultStacks(recipeIndex)),
+                new ArrayList<>(this.handler.getAuxiliaryStacks(recipeIndex)));
     }
 
     // re-reads the member stacks from the handler, keeps the cached instances when nothing changed

src/main/java/codechicken/nei/search/RecipeFilterVisitor.java

@@ -2,15 +2,12 @@ package codechicken.nei.search;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.function.Function;
 
 import codechicken.nei.ItemList.EverythingItemFilter;
 import codechicken.nei.SearchTokenParser;
 import codechicken.nei.api.IRecipeFilter;
 import codechicken.nei.api.ItemFilter;
 import codechicken.nei.filter.AllMultiRecipeFilter;
-import codechicken.nei.filter.AllOthersRecipeFilter;
-import codechicken.nei.filter.AnyOthersRecipeFilter;
 import codechicken.nei.filter.RecipeFilter;
 import codechicken.nei.filter.RecipeFilter.FilterContext;
 
@@ -51,11 +48,7 @@ public class RecipeFilterVisitor extends AbstractSearchExpressionVisitor<IRecipe
             case 1:
                 return new RecipeFilter(FilterContext.OUTPUT, !ctx.allRecipe, itemFilter);
             case 2:
-                return getAllOrAnyFilter(
-                        ctx.allRecipe,
-                        itemFilter,
-                        AnyOthersRecipeFilter::new,
-                        AllOthersRecipeFilter::new);
+                return new RecipeFilter(FilterContext.AUXILIARY, !ctx.allRecipe, itemFilter);
             // Doesn't support all by default
             case 3:
                 return new RecipeFilter(FilterContext.ANY, !ctx.allRecipe, itemFilter);
@@ -64,15 +57,6 @@ public class RecipeFilterVisitor extends AbstractSearchExpressionVisitor<IRecipe
         }
     }
 
-    private IRecipeFilter getAllOrAnyFilter(boolean allRecipe, ItemFilter itemFilter,
-            Function<ItemFilter, IRecipeFilter> createAnyFilter, Function<ItemFilter, IRecipeFilter> createAllFilter) {
-        if (allRecipe) {
-            return createAllFilter.apply(itemFilter);
-        } else {
-            return createAnyFilter.apply(itemFilter);
-        }
-    }
-
     private IRecipeFilter constructFilter(List<IRecipeFilter> filters) {
         if (!filters.isEmpty()) {
             // Propagate the result up

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

@@ -652,6 +652,8 @@ nei.recipe.search.tooltip.name=Filter Syntax
 nei.recipe.search.tooltip.shift=§7Hold §6Shift§7 for more info
 nei.recipe.search.tooltip.input=%s§ftext§8 - §7search in inputs
 nei.recipe.search.tooltip.output=%s§ftext§8 - §7search in outputs
+nei.recipe.search.tooltip.auxiliary=%s§ftext§8 - §7search in other stacks (fuel, catalysts)
+nei.recipe.search.tooltip.all=%s§ftext§8 - §7all inputs must match (same with > and ^)
 nei.recipe.search.tooltip.prefix=%stext§8 - §7%s
 
 nei.recipe.search.tooltip.prefix.modName=search by mod
@@ -665,6 +667,7 @@ nei.recipe.search.tooltip.exclude=%s§ftext§8 - §7exclude items with text
 nei.recipe.search.tooltip.exclude_recipe=%s§ftext§8 - §7exclude recipes with text
 nei.recipe.search.tooltip.or=§fa%s§fb§8 - §7match a or b
 nei.recipe.search.tooltip.exact=%s§ftext%s§8 - §7match exact phrase
+nei.recipe.search.tooltip.regex=%s§ftext%s§8 - §7match regular expression
 
 nei.recipe.shaped=Shaped Crafting
 nei.recipe.shapeless=Shapeless Crafting

src/test/java/codechicken/nei/SearchTokenParserTest.java

@@ -5,6 +5,7 @@ import static org.junit.jupiter.api.Named.named;
 import static org.mockito.Mockito.*;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.function.Function;
@@ -32,6 +33,8 @@ import codechicken.nei.ItemList.AnyMultiItemFilter;
 import codechicken.nei.ItemList.PatternItemFilter;
 import codechicken.nei.SearchField.SearchParserProvider;
 import codechicken.nei.api.ItemFilter;
+import codechicken.nei.api.ItemInfo;
+import codechicken.nei.recipe.IRecipeHandler;
 import codechicken.nei.search.IdentifierFilter;
 
 @DisplayName("Search expression")
@@ -65,6 +68,7 @@ public class SearchTokenParserTest {
     private static final ModeValue[] extendedPlusPatternMode = { patternModes[3] };
     private static final ModeValue[] extendedPatternModes = { patternModes[1], patternModes[3] };
     private static final ModeValue[] nonGrammarPatternModes = { patternModes[0], patternModes[1], patternModes[2] };
+    private static final ModeValue[] nonRegexPatternModes = { patternModes[0], patternModes[1], patternModes[3] };
 
     private static final SearchParserProvider defaultParserProvider = parserProvider(
             '\0',
@@ -140,6 +144,14 @@ public class SearchTokenParserTest {
             spaceModes,
             extendedPatternModes);
 
+    private static final List<Arguments> extendedOnlyAllSpaceModesTestProvider = combinationsProvider(
+            spaceModes,
+            new ModeValue[] { patternModes[1] });
+
+    private static final List<Arguments> nonRegexAllSpaceModesTestProvider = combinationsProvider(
+            spaceModes,
+            nonRegexPatternModes);
+
     private static final List<Arguments> spaceIsAndExtendedPlusModeTestProvider = combinationsProvider(
             spaceIsAndMode,
             extendedPlusPatternMode);
@@ -176,6 +188,7 @@ public class SearchTokenParserTest {
         config.when(() -> NEIClientConfig.getBooleanSetting(eq("inventory.search.logSearchExceptions")))
                 .thenReturn(false);
 
+        mockStatic(ItemInfo.class);
     }
 
     // All modes tests
@@ -321,6 +334,62 @@ public class SearchTokenParserTest {
         assertTrue(matchedItems.contains(itemABC));
     }
 
+    @DisplayName("Regex with delimiters")
+    @ParameterizedTest(name = "{argumentsWithNames}")
+    @FieldSource("extendedOnlyAllSpaceModesTestProvider")
+    public void testRegexWithDelimiters(int spaceMode, int patternMode) {
+        SearchTokenParser searchParser = new SearchTokenParser();
+        searchParser.addProvider(defaultParserProvider);
+        Set<ItemStack> matchedItems = testFilterAgainstAllItems(
+                spaceMode,
+                patternMode,
+                searchParser,
+                "r/^" + itemA.getDisplayName() + "|^" + itemC.getDisplayName() + "/",
+                true);
+
+        assertEquals(4, matchedItems.size());
+        assertTrue(matchedItems.contains(itemA));
+        assertTrue(matchedItems.contains(itemC));
+        assertTrue(matchedItems.contains(itemAB));
+        assertTrue(matchedItems.contains(itemABC));
+    }
+
+    @DisplayName("Regex followed by delimiter")
+    @ParameterizedTest(name = "{argumentsWithNames}")
+    @FieldSource("extendedAllSpaceModesTestProvider")
+    public void testRegexFollowedByDelimiter(int spaceMode, int patternMode) {
+        SearchTokenParser searchParser = new SearchTokenParser();
+        searchParser.addProvider(defaultParserProvider);
+        Set<ItemStack> matchedItems = testFilterAgainstAllItems(
+                spaceMode,
+                patternMode,
+                searchParser,
+                "r/^" + itemA.getDisplayName() + "$/|" + itemC.getDisplayName());
+
+        assertEquals(3, matchedItems.size());
+        assertTrue(matchedItems.contains(itemA));
+        assertTrue(matchedItems.contains(itemC));
+        assertTrue(matchedItems.contains(itemABC));
+    }
+
+    @DisplayName("Recipe context")
+    @ParameterizedTest(name = "{argumentsWithNames}")
+    @FieldSource("nonRegexAllSpaceModesTestProvider")
+    public void testRecipeContext(int spaceMode, int patternMode) {
+        SearchTokenParser searchParser = new SearchTokenParser();
+        searchParser.addProvider(defaultParserProvider);
+        IRecipeHandler handler = mock(IRecipeHandler.class);
+        when(handler.getIngredientStacks(0)).thenReturn(positionedStacks(itemA));
+        when(handler.getResultStacks(0)).thenReturn(positionedStacks(itemB));
+        when(handler.getAuxiliaryStacks(0)).thenReturn(positionedStacks(itemC));
+
+        assertTrue(testRecipeFilter(spaceMode, patternMode, searchParser, "<" + itemA.getDisplayName(), handler));
+        assertTrue(testRecipeFilter(spaceMode, patternMode, searchParser, ">" + itemB.getDisplayName(), handler));
+        assertTrue(testRecipeFilter(spaceMode, patternMode, searchParser, "^" + itemC.getDisplayName(), handler));
+        assertFalse(testRecipeFilter(spaceMode, patternMode, searchParser, "^" + itemB.getDisplayName(), handler));
+        assertFalse(testRecipeFilter(spaceMode, patternMode, searchParser, ">" + itemC.getDisplayName(), handler));
+    }
+
     // Extended+ specific tests
 
     @DisplayName("Sequence")
@@ -403,10 +472,14 @@ public class SearchTokenParserTest {
 
     private static Set<ItemStack> testFilterAgainstAllItems(int spaceMode, int patternMode,
             SearchTokenParser searchParser, String search) {
-        config.when(() -> NEIClientConfig.getIntSetting(eq("inventory.search.patternMode"))).thenReturn(patternMode);
-        config.when(() -> NEIClientConfig.getIntSetting(eq("inventory.search.spaceMode"))).thenReturn(spaceMode);
+        return testFilterAgainstAllItems(spaceMode, patternMode, searchParser, search, false);
+    }
 
-        ItemFilter filter = searchParser.getFilter(search);
+    private static Set<ItemStack> testFilterAgainstAllItems(int spaceMode, int patternMode,
+            SearchTokenParser searchParser, String search, boolean skipRecipeTokens) {
+        setModes(spaceMode, patternMode);
+
+        ItemFilter filter = searchParser.getFilter(search, skipRecipeTokens);
         if (filter instanceof SearchTokenParser.IsRegisteredItemFilter) {
             filter = ((SearchTokenParser.IsRegisteredItemFilter) filter).filter;
         }
@@ -415,6 +488,23 @@ public class SearchTokenParserTest {
         return matchedItems;
     }
 
+    private static boolean testRecipeFilter(int spaceMode, int patternMode, SearchTokenParser searchParser,
+            String search, IRecipeHandler handler) {
+        setModes(spaceMode, patternMode);
+        return searchParser.getRecipeFilter(search).matches(handler, 0);
+    }
+
+    private static void setModes(int spaceMode, int patternMode) {
+        config.when(() -> NEIClientConfig.getIntSetting(eq("inventory.search.patternMode"))).thenReturn(patternMode);
+        config.when(() -> NEIClientConfig.getIntSetting(eq("inventory.search.spaceMode"))).thenReturn(spaceMode);
+    }
+
+    private static List<PositionedStack> positionedStacks(ItemStack stack) {
+        PositionedStack pStack = mock(PositionedStack.class);
+        pStack.items = new ItemStack[] { stack };
+        return Collections.singletonList(pStack);
+    }
+
     private static SearchParserProvider parserProvider(char prefix, String name,
             SearchTokenParser.SearchMode searchMode, Function<Pattern, ItemFilter> createFilter) {
         return new SearchParserProvider(prefix, name, EnumChatFormatting.RESET, createFilter) {