tailor: fix material overrun issue

properly track materials required for already-queued jobs

fixes #3056

docs/changelog.txt

@@ -37,8 +37,8 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - `prospector`: prospector tool in fort mode is now available. embark prospect is not yet available and is disabled at this time.
 
 ## Fixes
-- `tailor`: now properly discriminates between dyed and undyed cloth and no longer defaults to using adamantine
 - `buildingplan`: upright spike traps are now placed extended rather than retracted
+- `tailor`: now properly discriminates between dyed and undyed cloth, no longer defaults to using adamantine, and properly tracks material requirements for already queued orders
 
 ## Misc Improvements
 - `stockpiles`: support applying stockpile configurations with fully enabled categories to stockpiles in worlds other than the one where the configuration was exported from

library/xml

@@ -1 +1 @@
-Subproject commit 8b8ac2de03ab5f8e5506864a751933059abfd03e
+Subproject commit 0dc8ae87746e287538be01f01dc628662e756794

plugins/tailor.cpp

@@ -383,6 +383,17 @@ public:
 
             auto sub = o->item_subtype;
             int race = o->hist_figure_id;
+
+            for (auto& m : all_materials)
+            {
+                if (o->material_category.whole == m.job_material.whole)
+                {
+                    supply[m] -= o->amount_left;
+                    TRACE(cycle).print("tailor: supply of %s reduced by %d due to being required for an existing order\n",
+                        m.name.c_str(), o->amount_left);
+                }
+            }
+
             if (race == -1)
                 continue; // -1 means that the race of the worker will determine the size made; we must ignore these jobs
 
@@ -525,6 +536,18 @@ public:
         }
         return ordered;
     }
+
+    int do_cycle()
+    {
+        reset();
+        scan_clothing();
+        scan_materials();
+        scan_replacements();
+        create_orders();
+        scan_existing_orders();
+        return place_orders();
+    }
+
 };
 
 static std::unique_ptr<Tailor> tailor_instance;
@@ -684,13 +707,7 @@ static int do_cycle(color_ostream &out) {
 
     DEBUG(cycle,out).print("running %s cycle\n", plugin_name);
 
-    tailor_instance->reset();
-    tailor_instance->scan_clothing();
-    tailor_instance->scan_materials();
-    tailor_instance->scan_replacements();
-    tailor_instance->create_orders();
-    tailor_instance->scan_existing_orders();
-    return tailor_instance->place_orders();
+    return tailor_instance->do_cycle();
 }
 
 /////////////////////////////////////////////////////