[Spells] Implemented SPA 415 SE_FFItemClass (#1688)

* prelim

* Spell Focus implemented

* AA implemented

* Update spdat.h

* Update spdat.h

* prelim excludes

* enum limit expansion

* overhaul

* v2 testing

* updates

* working

* Fin

* Update spell_effects.cpp

* Update spell_effects.cpp

* var fix

* Update spell_effects.cpp

make it not apply to casted spells... oops

* Update spell_effects.cpp

* Update spell_effects.cpp

common/spdat.cpp

@@ -1230,7 +1230,7 @@ bool IsEffectIgnoredInStacking(int spa)
 	case SE_LimitClass:
 	case SE_LimitRace:
 	case SE_FcBaseEffects:
-	case 415:
+	case SE_FFItemClass:
 	case SE_SkillDamageAmount2:
 	case SE_FcLimitUse:
 	case SE_FcIncreaseNumHits:
@@ -1298,6 +1298,7 @@ bool IsFocusLimit(int spa)
 	case SE_Ff_Value_Min:
 	case SE_Ff_Value_Max:
 	case SE_Ff_FocusTimerMin:
+	case SE_FFItemClass:
 		return true;
 	default:
 		return false;

common/spdat.h

@@ -177,7 +177,7 @@
 #define EFFECT_COUNT 12
 #define MAX_SPELL_TRIGGER 12	// One for each slot(only 6 for AA since AA use 2)
 #define MAX_RESISTABLE_EFFECTS 12	// Number of effects that are typcially checked agianst resists.
-#define MaxLimitInclude 16 //Number(x 0.5) of focus Limiters that have inclusive checks used when calcing focus effects
+#define MaxLimitInclude 18 //Number(x 0.5) of focus Limiters that have inclusive checks used when calcing focus effects
 #define MAX_SKILL_PROCS 4 //Number of spells to check skill procs from. (This is arbitrary) [Single spell can have multiple proc checks]
 #define MAX_AA_PROCS 16 //(Actual Proc Amount is MAX_AA_PROCS/4) Number of spells to check AA procs from. (This is arbitrary)
 #define MAX_SYMPATHETIC_PROCS 10 // Number of sympathetic procs a client can have (This is arbitrary)
@@ -206,7 +206,9 @@ enum FocusLimitIncludes {
 	IncludeExistsSELimitSpellClass    = 12,
 	IncludeFoundSELimitSpellClass     = 13,
 	IncludeExistsSELimitSpellSubclass = 14,
-	IncludeFoundSELimitSpellSubclass  = 15
+	IncludeFoundSELimitSpellSubclass  = 15,
+	IncludeExistsSEFFItemClass        = 16,
+	IncludeFoundSEFFItemClass         = 17
 };
 /*
 	The id's correspond to 'type' 39 in live(2021) dbstr_us gives the message for target and caster restricted effects. These are not present in the ROF2 dbstr_us.
@@ -1115,7 +1117,7 @@ typedef enum {
 #define SE_LimitRace					412 // implemented, @Ff, Race that can use the spell focus, base1: race, Note: not used in any known live spells. Use only single race at a time.
 #define SE_FcBaseEffects				413 // implemented, @Fc, On Caster, base spell effectiveness mod pct, base: pct
 #define SE_LimitCastingSkill			414 // implemented, @Ff, Spell and singing skills(s) that a spell focus can require or exclude, base1: skill id, Include: Positive Exclude: Negative
-//#define SE_FFItemClass				415 // not used - base1 matches ItemType, base2 matches SubType, -1 ignored, max is bitmask of valid slots
+#define SE_FFItemClass					415 // implemented, @Ff, Limits focuses to be applied only from item click. base1: item ItemType (-1 to include for all ItemTypes,-1000 to exclude clicks from getting the focus, or exclude specific SubTypes or Slots if set), limit: item SubType (-1 for all SubTypes), max: item Slots (bitmask of valid slots, -1 ALL slots), Note: not used on live. See comments in Mob::CalcFocusEffect for more details.
 #define SE_ACv2							416 // implemented - New AC spell effect
 #define SE_ManaRegen_v2					417 // implemented - New mana regen effect
 #define SE_SkillDamageAmount2			418 // implemented - adds skill damage directly to certain attacks