From 69025254711439913c22d9fd8217e802c0bb0dee Mon Sep 17 00:00:00 2001
From: Salty Panda <zjadaczwatrob@gmail.com>
Date: Mon, 25 Jan 2021 23:16:02 +0100
Subject: [PATCH] Allow for excluding words in recipes filter (#46985)

---
 src/crafting_gui.cpp      | 10 ++++++++++
 src/recipe_dictionary.cpp |  3 +++
 src/recipe_dictionary.h   |  1 +
 3 files changed, 14 insertions(+)

diff --git a/src/crafting_gui.cpp b/src/crafting_gui.cpp
index b16997566dae8..1fd5e6ee8df0f 100644
--- a/src/crafting_gui.cpp
+++ b/src/crafting_gui.cpp
@@ -769,6 +769,9 @@ const recipe *select_crafting_recipe( int &batch_size )
                                 default:
                                     current.clear();
                             }
+                        } else if( qry_filter_str.size() > 1 && qry_filter_str[0] == '-' ) {
+                            filtered_recipes = filtered_recipes.reduce( qry_filter_str.substr( 1 ),
+                                               recipe_subset::search_type::exclude_name, progress_callback );
                         } else {
                             filtered_recipes = filtered_recipes.reduce( qry_filter_str );
                         }
@@ -956,6 +959,13 @@ const recipe *select_crafting_recipe( int &batch_size )
                                    _( "  <color_white>%s</color>%.*s    %s\n" ),
                                    example_name, padding, spaces,
                                    _( "<color_cyan>name</color> of resulting item" ) );
+
+                std::string example_exclude = _( "clean" );
+                padding = max_example_length - utf8_width( example_exclude );
+                description += string_format(
+                                   _( "  <color_yellow>-</color><color_white>%s</color>%.*s   %s\n" ),
+                                   example_exclude, padding, spaces,
+                                   _( "<color_cyan>names</color> to exclude" ) );
             }
 
             for( const auto &prefix : prefixes ) {
diff --git a/src/recipe_dictionary.cpp b/src/recipe_dictionary.cpp
index 2d0c096ddf85a..5ee49fc6a024f 100644
--- a/src/recipe_dictionary.cpp
+++ b/src/recipe_dictionary.cpp
@@ -157,6 +157,9 @@ std::vector<const recipe *> recipe_subset::search(
             case search_type::name:
                 return lcmatch( r->result_name(), txt );
 
+            case search_type::exclude_name:
+                return !lcmatch( r->result_name(), txt );
+
             case search_type::skill:
                 return lcmatch( r->required_skills_string( nullptr, true, false ), txt );
 
diff --git a/src/recipe_dictionary.h b/src/recipe_dictionary.h
index e1a5eb026a041..4e9bc83de7d73 100644
--- a/src/recipe_dictionary.h
+++ b/src/recipe_dictionary.h
@@ -128,6 +128,7 @@ class recipe_subset
 
         enum class search_type : int {
             name,
+            exclude_name,
             skill,
             primary_skill,
             component,