Introducing the equip preview window

Fixes some bugs for 2016-09-21 onward, where you can preview how a item would like if you put it on.
This works on other people's vending and on your own inventory.

Thanks to @Rytech2 and @hazimjauhari90

src/map/clif.c

@@ -2508,6 +2508,7 @@ void clif_add_random_options(unsigned char* buf, struct item *it) {
 /// 02d4 <index>.W <amount>.W <name id>.W <identified>.B <damaged>.B <refine>.B <card1>.W <card2>.W <card3>.W <card4>.W <equip location>.W <item type>.B <result>.B <expire time>.L <bindOnEquipType>.W (ZC_ITEM_PICKUP_ACK3)
 /// 0990 <index>.W <amount>.W <name id>.W <identified>.B <damaged>.B <refine>.B <card1>.W <card2>.W <card3>.W <card4>.W <equip location>.L <item type>.B <result>.B <expire time>.L <bindOnEquipType>.W (ZC_ITEM_PICKUP_ACK_V5)
 /// 0a0c <index>.W <amount>.W <name id>.W <identified>.B <damaged>.B <refine>.B <card1>.W <card2>.W <card3>.W <card4>.W <equip location>.L <item type>.B <result>.B <expire time>.L <bindOnEquipType>.W (ZC_ITEM_PICKUP_ACK_V6)
+/// 0a37 <index>.W <amount>.W <name id>.W <identified>.B <damaged>.B <refine>.B <card1>.W <card2>.W <card3>.W <card4>.W <equip location>.L <item type>.B <result>.B <expire time>.L <bindOnEquipType>.W <favorite>.B <view id>.W (ZC_ITEM_PICKUP_ACK_V7)
 void clif_additem(struct map_session_data *sd, int n, int amount, unsigned char fail)
 {
 	int fd, header, offs=0;
@@ -2519,8 +2520,10 @@ void clif_additem(struct map_session_data *sd, int n, int amount, unsigned char
 	header = 0x2d4;
 #elif PACKETVER < 20150226
 	header = 0x990;
-#else
+#elif PACKETVER < 20160921
 	header = 0xa0c;
+#else
+	header = 0xa37;
 #endif
 	nullpo_retv(sd);
 
@@ -2557,6 +2560,10 @@ void clif_additem(struct map_session_data *sd, int n, int amount, unsigned char
 		WFIFOW(fd,offs+27) = 0;  //  HireExpireDate
 #if PACKETVER >= 20150226
 		clif_add_random_options(WFIFOP(fd,offs+31), &sd->inventory.u.items_inventory[n]);
+#if PACKETVER >= 20160921
+		WFIFOB(fd,offs+54) = 0; // Favorite
+		WFIFOW(fd,offs+55) = 0; // View ID
+#endif
 #endif
 #endif
 	}
@@ -2593,6 +2600,10 @@ void clif_additem(struct map_session_data *sd, int n, int amount, unsigned char
 #endif
 #if PACKETVER >= 20150226
 		clif_add_random_options(WFIFOP(fd,31), &sd->inventory.u.items_inventory[n]);
+#if PACKETVER >= 20160921
+		WFIFOB(fd,offs+54) = sd->inventory.u.items_inventory[n].favorite;
+		WFIFOW(fd,offs+55) = sd->inventory_data[n]->view_id > 0 ? sd->inventory_data[n]->view_id : sd->inventory_data[n]->nameid;
+#endif
 #endif
 	}
 
@@ -7104,8 +7115,10 @@ void clif_vendinglist(struct map_session_data* sd, int id, struct s_vending* ven
 
 #if PACKETVER < 20150226
 	const int item_length = 22;
-#else
+#elif PACKETVER < 20160921
 	const int item_length = 47;
+#else
+	const int item_length = 53;
 #endif
 
 	nullpo_retv(sd);
@@ -7138,6 +7151,10 @@ void clif_vendinglist(struct map_session_data* sd, int id, struct s_vending* ven
 		clif_addcards(WFIFOP(fd,offset+14+i*item_length), &vsd->cart.u.items_cart[index]);
 #if PACKETVER >= 20150226
 		clif_add_random_options(WFIFOP(fd,offset+22+i*item_length), &vsd->cart.u.items_cart[index]);
+#if PACKETVER >= 20160921
+		WFIFOL(fd,offset+47+i*item_length) = pc_equippoint_sub(sd,data);
+		WFIFOW(fd,offset+51+i*item_length) = data->view_id > 0 ? data->view_id : data->nameid;
+#endif
 #endif
 	}
 	WFIFOSET(fd,WFIFOW(fd,2));
@@ -19542,7 +19559,7 @@ void packetdb_readdb(bool reload)
 #endif
 		-1,  0,  0, 26,  0,  0,  0,  0,  14,  2, 23,  2, -1,  2,  3,  2,
 	   21,  3,  5,  0, 66,  0,  0,  8,  3,  0,  0,  -1,  0,  -1,  0,  0,
- 	  106,  0,  0,  0,  0,  4,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+ 	  106,  0,  0,  0,  0,  4,  0, 59,  0,  0,  0,  0,  0,  0,  0,  0,
 	};
 	struct {
 		void (*func)(int, struct map_session_data *);

src/map/pc.c

@@ -662,23 +662,21 @@ void pc_setnewpc(struct map_session_data *sd, uint32 account_id, uint32 char_id,
 /**
 * Get equip point for an equip
 * @param sd
-* @param n Equip index in inventory
+* @param id
 */
-int pc_equippoint(struct map_session_data *sd,int n){
+int pc_equippoint_sub(struct map_session_data *sd,struct item_data* id){
 	int ep = 0;
 
 	nullpo_ret(sd);
+	nullpo_ret(id);
 
-	if(!sd->inventory_data[n])
-		return 0;
-
-	if (!itemdb_isequip2(sd->inventory_data[n]))
+	if (!itemdb_isequip2(id))
 		return 0; //Not equippable by players.
 
-	ep = sd->inventory_data[n]->equip;
-	if(sd->inventory_data[n]->look == W_DAGGER	||
-		sd->inventory_data[n]->look == W_1HSWORD ||
-		sd->inventory_data[n]->look == W_1HAXE) {
+	ep = id->equip;
+	if(id->look == W_DAGGER	||
+		id->look == W_1HSWORD ||
+		id->look == W_1HAXE) {
 		if(ep == EQP_HAND_R && (pc_checkskill(sd,AS_LEFT) > 0 || (sd->class_&MAPID_UPPERMASK) == MAPID_ASSASSIN ||
 			(sd->class_&MAPID_UPPERMASK) == MAPID_KAGEROUOBORO))//Kagerou and Oboro can dual wield daggers. [Rytech]
 			return EQP_ARMS;
@@ -686,6 +684,17 @@ int pc_equippoint(struct map_session_data *sd,int n){
 	return ep;
 }
 
+/**
+* Get equip point for an equip
+* @param sd
+* @param n Equip index in inventory
+*/
+int pc_equippoint(struct map_session_data *sd,int n){
+	nullpo_ret(sd);
+
+	return pc_equippoint_sub(sd,sd->inventory_data[n]);
+}
+
 /**
  * Fill inventory_data with struct *item_data through inventory (fill with struct *item)
  * @param sd : player session

src/map/pc.h

@@ -986,6 +986,7 @@ int pc_close_npc_timer(int tid, unsigned int tick, int id, intptr_t data);
 void pc_setequipindex(struct map_session_data *sd);
 uint8 pc_isequip(struct map_session_data *sd,int n);
 int pc_equippoint(struct map_session_data *sd,int n);
+int pc_equippoint_sub(struct map_session_data *sd, struct item_data* id);
 void pc_setinventorydata(struct map_session_data *sd);
 
 int pc_get_skillcooldown(struct map_session_data *sd, uint16 skill_id, uint16 skill_lv);