devilutionX/Source/inv.cpp

/**
 * @file inv.cpp
 *
 * Implementation of player inventory.
 */
#include <utility>

#include <algorithm>
#include <fmt/format.h>

#include "cursor.h"
#include "engine/render/cel_render.hpp"
#include "engine/render/text_render.hpp"
#include "minitext.h"
#include "options.h"
#include "plrmsg.h"
#include "stores.h"
#include "towners.h"
#include "utils/language.h"
#include "utils/stdcompat/optional.hpp"

namespace devilution {
namespace {
std::optional<CelSprite> pInvCels;
} // namespace

bool invflag;
bool drawsbarflag;
int sgdwLastTime; // check name

/**
 * Maps from inventory slot to screen position. The inventory slots are
 * arranged as follows:
 *                          00 01
 *                          02 03   06
 *
 *              07 08       19 20       13 14
 *              09 10       21 22       15 16
 *              11 12       23 24       17 18
 *
 *                 04                   05
 *
 *              25 26 27 28 29 30 31 32 33 34
 *              35 36 37 38 39 40 41 42 43 44
 *              45 46 47 48 49 50 51 52 53 54
 *              55 56 57 58 59 60 61 62 63 64
 *
 * 65 66 67 68 69 70 71 72
 * @see graphics/inv/inventory.png
 */
const Point InvRect[] = {
	// clang-format off
	//  X,   Y
	{ 132,  31 }, // helmet
	{ 160,  31 }, // helmet
	{ 132,  59 }, // helmet
	{ 160,  59 }, // helmet
	{  45, 205 }, // left ring
	{ 247, 205 }, // right ring
	{ 204,  59 }, // amulet
	{  17, 104 }, // left hand
	{  46, 104 }, // left hand
	{  17, 132 }, // left hand
	{  46, 132 }, // left hand
	{  17, 160 }, // left hand
	{  46, 160 }, // left hand
	{ 247, 104 }, // right hand
	{ 276, 104 }, // right hand
	{ 247, 132 }, // right hand
	{ 276, 132 }, // right hand
	{ 247, 160 }, // right hand
	{ 276, 160 }, // right hand
	{ 132, 104 }, // chest
	{ 160, 104 }, // chest
	{ 132, 132 }, // chest
	{ 160, 132 }, // chest
	{ 132, 160 }, // chest
	{ 160, 160 }, // chest
	{  17, 250 }, // inv row 1
	{  46, 250 }, // inv row 1
	{  75, 250 }, // inv row 1
	{ 104, 250 }, // inv row 1
	{ 133, 250 }, // inv row 1
	{ 162, 250 }, // inv row 1
	{ 191, 250 }, // inv row 1
	{ 220, 250 }, // inv row 1
	{ 249, 250 }, // inv row 1
	{ 278, 250 }, // inv row 1
	{  17, 279 }, // inv row 2
	{  46, 279 }, // inv row 2
	{  75, 279 }, // inv row 2
	{ 104, 279 }, // inv row 2
	{ 133, 279 }, // inv row 2
	{ 162, 279 }, // inv row 2
	{ 191, 279 }, // inv row 2
	{ 220, 279 }, // inv row 2
	{ 249, 279 }, // inv row 2
	{ 278, 279 }, // inv row 2
	{  17, 308 }, // inv row 3
	{  46, 308 }, // inv row 3
	{  75, 308 }, // inv row 3
	{ 104, 308 }, // inv row 3
	{ 133, 308 }, // inv row 3
	{ 162, 308 }, // inv row 3
	{ 191, 308 }, // inv row 3
	{ 220, 308 }, // inv row 3
	{ 249, 308 }, // inv row 3
	{ 278, 308 }, // inv row 3
	{  17, 337 }, // inv row 4
	{  46, 337 }, // inv row 4
	{  75, 337 }, // inv row 4
	{ 104, 337 }, // inv row 4
	{ 133, 337 }, // inv row 4
	{ 162, 337 }, // inv row 4
	{ 191, 337 }, // inv row 4
	{ 220, 337 }, // inv row 4
	{ 249, 337 }, // inv row 4
	{ 278, 337 }, // inv row 4
	{ 205,  33 }, // belt
	{ 234,  33 }, // belt
	{ 263,  33 }, // belt
	{ 292,  33 }, // belt
	{ 321,  33 }, // belt
	{ 350,  33 }, // belt
	{ 379,  33 }, // belt
	{ 408,  33 }  // belt
	// clang-format on
};

/* data */

void FreeInvGFX()
{
	pInvCels = std::nullopt;
}

void InitInv()
{
	auto &myPlayer = plr[myplr];

	if (myPlayer._pClass == HeroClass::Warrior) {
		pInvCels = LoadCel("Data\\Inv\\Inv.CEL", SPANEL_WIDTH);
	} else if (myPlayer._pClass == HeroClass::Rogue) {
		pInvCels = LoadCel("Data\\Inv\\Inv_rog.CEL", SPANEL_WIDTH);
	} else if (myPlayer._pClass == HeroClass::Sorcerer) {
		pInvCels = LoadCel("Data\\Inv\\Inv_Sor.CEL", SPANEL_WIDTH);
	} else if (myPlayer._pClass == HeroClass::Monk) {
		if (!gbIsSpawn)
			pInvCels = LoadCel("Data\\Inv\\Inv_Sor.CEL", SPANEL_WIDTH);
		else
			pInvCels = LoadCel("Data\\Inv\\Inv.CEL", SPANEL_WIDTH);
	} else if (myPlayer._pClass == HeroClass::Bard) {
		pInvCels = LoadCel("Data\\Inv\\Inv_rog.CEL", SPANEL_WIDTH);
	} else if (myPlayer._pClass == HeroClass::Barbarian) {
		pInvCels = LoadCel("Data\\Inv\\Inv.CEL", SPANEL_WIDTH);
	}

	invflag = false;
	drawsbarflag = false;
}

static void InvDrawSlotBack(const CelOutputBuffer &out, int x, int y, int w, int h)
{
	BYTE *dst = out.at(x, y);

	for (int hgt = h; hgt != 0; hgt--, dst -= out.pitch() + w) {
		for (int wdt = w; wdt != 0; wdt--) {
			BYTE pix = *dst;
			if (pix >= PAL16_BLUE) {
				if (pix <= PAL16_BLUE + 15)
					pix -= PAL16_BLUE - PAL16_BEIGE;
				else if (pix >= PAL16_GRAY)
					pix -= PAL16_GRAY - PAL16_BEIGE;
			}
			*dst++ = pix;
		}
	}
}

void DrawInv(const CelOutputBuffer &out)
{
	CelDrawTo(out, { RIGHT_PANEL_X, 351 }, *pInvCels, 1);

	Size slotSize[] = {
		{ 2, 2 }, //head
		{ 1, 1 }, //left ring
		{ 1, 1 }, //right ring
		{ 1, 1 }, //amulet
		{ 2, 3 }, //left hand
		{ 2, 3 }, //right hand
		{ 2, 3 }, // chest
	};

	Point slotPos[] = {
		{ 133, 59 },  //head
		{ 48, 205 },  //left ring
		{ 249, 205 }, //right ring
		{ 205, 60 },  //amulet
		{ 17, 160 },  //left hand
		{ 248, 160 }, //right hand
		{ 133, 160 }, // chest
	};

	auto &myPlayer = plr[myplr];

	for (int slot = INVLOC_HEAD; slot < NUM_INVLOC; slot++) {
		if (!myPlayer.InvBody[slot].isEmpty()) {
			int screenX = slotPos[slot].x;
			int screenY = slotPos[slot].y;
			InvDrawSlotBack(out, RIGHT_PANEL_X + screenX, screenY, slotSize[slot].Width * INV_SLOT_SIZE_PX, slotSize[slot].Height * INV_SLOT_SIZE_PX);

			int frame = myPlayer.InvBody[slot]._iCurs + CURSOR_FIRSTITEM;

			int frameW;
			int frameH;
			std::tie(frameW, frameH) = GetInvItemSize(frame);

			// calc item offsets for weapons smaller than 2x3 slots
			if (slot == INVLOC_HAND_LEFT) {
				screenX += frameW == INV_SLOT_SIZE_PX ? 14 : 0;
				screenY += frameH == (3 * INV_SLOT_SIZE_PX) ? 0 : -14;
			} else if (slot == INVLOC_HAND_RIGHT) {
				screenX += frameW == INV_SLOT_SIZE_PX ? 13 : 1;
				screenY += frameH == 3 * INV_SLOT_SIZE_PX ? 0 : -14;
			}

			const auto &cel = GetInvItemSprite(frame);
			const int celFrame = GetInvItemFrame(frame);
			const Point position { RIGHT_PANEL_X + screenX, screenY };

			if (pcursinvitem == slot) {
				CelBlitOutlineTo(out, GetOutlineColor(myPlayer.InvBody[slot], true), position, cel, celFrame, false);
			}

			CelDrawItem(myPlayer.InvBody[slot]._iStatFlag, out, position, cel, celFrame);

			if (slot == INVLOC_HAND_LEFT) {
				if (myPlayer.InvBody[slot]._iLoc == ILOC_TWOHAND) {
					if (myPlayer._pClass != HeroClass::Barbarian
					    || (myPlayer.InvBody[slot]._itype != ITYPE_SWORD
					        && myPlayer.InvBody[slot]._itype != ITYPE_MACE)) {
						InvDrawSlotBack(out, RIGHT_PANEL_X + slotPos[INVLOC_HAND_RIGHT].x, slotPos[INVLOC_HAND_RIGHT].y, slotSize[INVLOC_HAND_RIGHT].Width * INV_SLOT_SIZE_PX, slotSize[INVLOC_HAND_RIGHT].Height * INV_SLOT_SIZE_PX);
						light_table_index = 0;
						cel_transparency_active = true;

						const int dstX = RIGHT_PANEL_X + slotPos[INVLOC_HAND_RIGHT].x + (frameW == INV_SLOT_SIZE_PX ? 13 : -1);
						const int dstY = slotPos[INVLOC_HAND_RIGHT].y;
						CelClippedBlitLightTransTo(out, { dstX, dstY }, cel, celFrame);

						cel_transparency_active = false;
					}
				}
			}
		}
	}

	for (int i = 0; i < NUM_INV_GRID_ELEM; i++) {
		if (myPlayer.InvGrid[i] != 0) {
			InvDrawSlotBack(
			    out,
			    InvRect[i + SLOTXY_INV_FIRST].x + RIGHT_PANEL_X,
			    InvRect[i + SLOTXY_INV_FIRST].y - 1,
			    INV_SLOT_SIZE_PX,
			    INV_SLOT_SIZE_PX);
		}
	}

	for (int j = 0; j < NUM_INV_GRID_ELEM; j++) {
		if (myPlayer.InvGrid[j] > 0) { // first slot of an item
			int ii = myPlayer.InvGrid[j] - 1;
			int frame = myPlayer.InvList[ii]._iCurs + CURSOR_FIRSTITEM;

			const auto &cel = GetInvItemSprite(frame);
			const int celFrame = GetInvItemFrame(frame);
			const Point position { InvRect[j + SLOTXY_INV_FIRST].x + RIGHT_PANEL_X, InvRect[j + SLOTXY_INV_FIRST].y - 1 };
			if (pcursinvitem == ii + INVITEM_INV_FIRST) {
				CelBlitOutlineTo(
				    out,
				    GetOutlineColor(myPlayer.InvList[ii], true),
				    position,
				    cel, celFrame, false);
			}

			CelDrawItem(
			    myPlayer.InvList[ii]._iStatFlag,
			    out,
			    position,
			    cel, celFrame);
		}
	}
}

void DrawInvBelt(const CelOutputBuffer &out)
{
	if (talkflag) {
		return;
	}

	DrawPanelBox(out, { 205, 21, 232, 28 }, { PANEL_X + 205, PANEL_Y + 5 });

	auto &myPlayer = plr[myplr];

	for (int i = 0; i < MAXBELTITEMS; i++) {
		if (myPlayer.SpdList[i].isEmpty()) {
			continue;
		}

		const Point position { InvRect[i + SLOTXY_BELT_FIRST].x + PANEL_X, InvRect[i + SLOTXY_BELT_FIRST].y + PANEL_Y - 1 };
		InvDrawSlotBack(out, position.x, position.y, INV_SLOT_SIZE_PX, INV_SLOT_SIZE_PX);
		int frame = myPlayer.SpdList[i]._iCurs + CURSOR_FIRSTITEM;

		const auto &cel = GetInvItemSprite(frame);
		const int celFrame = GetInvItemFrame(frame);

		if (pcursinvitem == i + INVITEM_BELT_FIRST) {
			if (!sgbControllerActive || invflag) {
				CelBlitOutlineTo(out, GetOutlineColor(myPlayer.SpdList[i], true), position, cel, celFrame, false);
			}
		}

		CelDrawItem(myPlayer.SpdList[i]._iStatFlag, out, position, cel, celFrame);

		if (AllItemsList[myPlayer.SpdList[i].IDidx].iUsable
		    && myPlayer.SpdList[i]._iStatFlag
		    && myPlayer.SpdList[i]._itype != ITYPE_GOLD) {
			sprintf(tempstr, "%i", i + 1);
			SDL_Rect rect {
				InvRect[i + SLOTXY_BELT_FIRST].x + PANEL_X + INV_SLOT_SIZE_PX - GetLineWidth(tempstr),
				InvRect[i + SLOTXY_BELT_FIRST].y + PANEL_Y - 1,
				0,
				0
			};
			DrawString(out, tempstr, rect, UIS_SILVER);
		}
	}
}

/**
 * @brief Adds an item to a player's InvGrid array
 * @param invGridIndex Item's position in InvGrid (this should be the item's topleft grid tile)
 * @param invListIndex The item's InvList index (it's expected this already has +1 added to it since InvGrid can't store a 0 index)
 * @param sizeX Horizontal size of item
 * @param sizeY Vertical size of item
 */
static void AddItemToInvGrid(PlayerStruct &player, int invGridIndex, int invListIndex, int sizeX, int sizeY)
{
	const int pitch = 10;
	for (int y = 0; y < sizeY; y++) {
		for (int x = 0; x < sizeX; x++) {
			if (x == 0 && y == sizeY - 1)
				player.InvGrid[invGridIndex + x] = invListIndex;
			else
				player.InvGrid[invGridIndex + x] = -invListIndex;
		}
		invGridIndex += pitch;
	}
}

/**
 * @brief Gets the size, in inventory cells, of the given item.
 * @param item The item whose size is to be determined.
 * @return The size, in inventory cells, of the item.
 */
Size GetInventorySize(const ItemStruct &item)
{
	int itemSizeIndex = item._iCurs + CURSOR_FIRSTITEM;
	int w;
	int h;
	std::tie(w, h) = GetInvItemSize(itemSizeIndex);
	return { w / INV_SLOT_SIZE_PX, h / INV_SLOT_SIZE_PX };
}

/**
 * @brief Checks whether the given item can fit in a belt slot (i.e. the item's size in inventory cells is 1x1).
 * @param item The item to be checked.
 * @return 'True' in case the item can fit a belt slot and 'False' otherwise.
 */
bool FitsInBeltSlot(const ItemStruct &item)
{
	Size size = GetInventorySize(item);

	return size.Width == 1 && size.Height == 1;
}

/**
 * @brief Checks whether the given item can be placed on the belt. Takes item size as well as characteristics into account. Items
 * that cannot be placed on the belt have to be placed in the inventory instead.
 * @param item The item to be checked.
 * @return 'True' in case the item can be placed on the belt and 'False' otherwise.
 */
bool CanBePlacedOnBelt(const ItemStruct &item)
{
	return FitsInBeltSlot(item)
	    && item._itype != ITYPE_GOLD
	    && item._iStatFlag
	    && AllItemsList[item.IDidx].iUsable;
}

/**
 * @brief Checks whether the given item can be placed on the specified player's belt. Returns 'True' when the item can be placed
 * on belt slots and the player has at least one empty slot in his belt.
 * If 'persistItem' is 'True', the item is also placed in the belt.
 * @param player The player on whose belt will be checked.
 * @param item The item to be checked.
 * @param persistItem Pass 'True' to actually place the item in the belt. The default is 'False'.
 * @return 'True' in case the item can be placed on the player's belt and 'False' otherwise.
 */
bool AutoPlaceItemInBelt(PlayerStruct &player, const ItemStruct &item, bool persistItem)
{
	if (!CanBePlacedOnBelt(item)) {
		return false;
	}

	for (auto &beltItem : player.SpdList) {
		if (beltItem.isEmpty()) {
			if (persistItem) {
				beltItem = item;
				player.CalcScrolls();
				drawsbarflag = true;
			}

			return true;
		}
	}

	return false;
}

/**
 * @brief Checks whether the given item can be equipped. Since this overload doesn't take player information, it only considers
 * general aspects about the item, like if its requirements are met and if the item's target location is valid for the body.
 * @param item The item to check.
 * @return 'True' in case the item could be equipped in a player, and 'False' otherwise.
 */
bool CanEquip(const ItemStruct &item)
{
	return item.isEquipment()
	    && item._iStatFlag;
}

/**
 * @brief A specialized version of 'CanEquip(int, ItemStruct&, int)' that specifically checks whether the item can be equipped
 * in one/both of the player's hands.
 * @param player The player whose inventory will be checked for compatibility with the item.
 * @param item The item to check.
 * @return 'True' if the player can currently equip the item in either one of his hands (i.e. the required hands are empty and
 * allow the item), and 'False' otherwise.
 */
bool CanWield(PlayerStruct &player, const ItemStruct &item)
{
	if (!CanEquip(item) || (item._iLoc != ILOC_ONEHAND && item._iLoc != ILOC_TWOHAND))
		return false;

	ItemStruct &leftHandItem = player.InvBody[INVLOC_HAND_LEFT];
	ItemStruct &rightHandItem = player.InvBody[INVLOC_HAND_RIGHT];

	if (leftHandItem.isEmpty() && rightHandItem.isEmpty()) {
		return true;
	}

	if (!leftHandItem.isEmpty() && !rightHandItem.isEmpty()) {
		return false;
	}

	ItemStruct &occupiedHand = !leftHandItem.isEmpty() ? leftHandItem : rightHandItem;

	// Barbarian can wield two handed swords and maces in one hand, so we allow equiping any sword/mace as long as his occupied
	// hand has a shield (i.e. no dual wielding allowed)
	if (player._pClass == HeroClass::Barbarian) {
		if (occupiedHand._itype == ITYPE_SHIELD && (item._itype == ITYPE_SWORD || item._itype == ITYPE_MACE))
			return true;
	}

	// Bard can dual wield swords and maces, so we allow equiping one-handed weapons in her free slot as long as her occupied
	// slot is another one-handed weapon.
	if (player._pClass == HeroClass::Bard) {
		bool occupiedHandIsOneHandedSwordOrMace = occupiedHand._iLoc == ILOC_ONEHAND
		    && (occupiedHand._itype == ITYPE_SWORD || occupiedHand._itype == ITYPE_MACE);

		bool weaponToEquipIsOneHandedSwordOrMace = item._iLoc == ILOC_ONEHAND
		    && (item._itype == ITYPE_SWORD || item._itype == ITYPE_MACE);

		if (occupiedHandIsOneHandedSwordOrMace && weaponToEquipIsOneHandedSwordOrMace) {
			return true;
		}
	}

	return item._iLoc == ILOC_ONEHAND
	    && occupiedHand._iLoc == ILOC_ONEHAND
	    && item._iClass != occupiedHand._iClass;
}

/**
 * @brief Checks whether the specified item can be equipped in the desired body location on the player.
 * @param player The player whose inventory will be checked for compatibility with the item.
 * @param item The item to check.
 * @param bodyLocation The location in the inventory to be checked against.
 * @return 'True' if the player can currently equip the item in the specified body location (i.e. the body location is empty and
 * allows the item), and 'False' otherwise.
 */
bool CanEquip(PlayerStruct &player, const ItemStruct &item, inv_body_loc bodyLocation)
{
	if (!CanEquip(item) || player._pmode > PM_WALK3 || !player.InvBody[bodyLocation].isEmpty()) {
		return false;
	}

	switch (bodyLocation) {
	case INVLOC_AMULET:
		return item._iLoc == ILOC_AMULET;

	case INVLOC_CHEST:
		return item._iLoc == ILOC_ARMOR;

	case INVLOC_HAND_LEFT:
	case INVLOC_HAND_RIGHT:
		return CanWield(player, item);

	case INVLOC_HEAD:
		return item._iLoc == ILOC_HELM;

	case INVLOC_RING_LEFT:
	case INVLOC_RING_RIGHT:
		return item._iLoc == ILOC_RING;

	default:
		return false;
	}
}

/**
 * @brief Automatically attempts to equip the specified item in a specific location in the player's body.
 * @note On success, this will broadcast an equipment_change event to let other players know about the equipment change.
 * @param playerId The player number whose inventory will be checked for compatibility with the item.
 * @param item The item to equip.
 * @param bodyLocation The location in the inventory where the item should be equipped.
 * @param persistItem Indicates whether or not the item should be persisted in the player's body. Pass 'False' to check
 * whether the player can equip the item but you don't want the item to actually be equipped. 'True' by default.
 * @return 'True' if the item was equipped and 'False' otherwise.
 */
bool AutoEquip(int playerId, const ItemStruct &item, inv_body_loc bodyLocation, bool persistItem)
{
	auto &player = plr[playerId];

	if (!CanEquip(player, item, bodyLocation)) {
		return false;
	}

	if (persistItem) {
		player.InvBody[bodyLocation] = item;

		if (sgOptions.Audio.bAutoEquipSound && playerId == myplr) {
			PlaySFX(ItemInvSnds[ItemCAnimTbl[item._iCurs]]);
		}

		NetSendCmdChItem(false, bodyLocation);
		CalcPlrInv(playerId, true);
	}

	return true;
}

/**
 * @brief Automatically attempts to equip the specified item in the most appropriate location in the player's body.
 * @note On success, this will broadcast an equipment_change event to let other players know about the equipment change.
 * @param playerNumber The player number whose inventory will be checked for compatibility with the item.
 * @param item The item to equip.
 * @param persistItem Indicates whether or not the item should be persisted in the player's body. Pass 'False' to check
 * whether the player can equip the item but you don't want the item to actually be equipped. 'True' by default.
 * @return 'True' if the item was equipped and 'False' otherwise.
 */
bool AutoEquip(int playerNumber, const ItemStruct &item, bool persistItem)
{
	if (!CanEquip(item)) {
		return false;
	}

	for (int bodyLocation = INVLOC_HEAD; bodyLocation < NUM_INVLOC; bodyLocation++) {
		if (AutoEquip(playerNumber, item, (inv_body_loc)bodyLocation, persistItem)) {
			return true;
		}
	}

	return false;
}

/**
 * @brief Checks whether or not auto-equipping behavior is enabled for the given player and item.
 * @param player The player to check.
 * @param item The item to check.
 * @return 'True' if auto-equipping behavior is enabled for the player and item and 'False' otherwise.
 */
bool AutoEquipEnabled(const PlayerStruct &player, const ItemStruct &item)
{
	if (item.isWeapon()) {
		// Monk can use unarmed attack as an encouraged option, thus we do not automatically equip weapons on him so as to not
		// annoy players who prefer that playstyle.
		return player._pClass != HeroClass::Monk && sgOptions.Gameplay.bAutoEquipWeapons;
	}

	if (item.isArmor()) {
		return sgOptions.Gameplay.bAutoEquipArmor;
	}

	if (item.isHelm()) {
		return sgOptions.Gameplay.bAutoEquipHelms;
	}

	if (item.isShield()) {
		return sgOptions.Gameplay.bAutoEquipShields;
	}

	if (item.isJewelry()) {
		return sgOptions.Gameplay.bAutoEquipJewelry;
	}

	return true;
}

/**
 * @brief Checks whether the given item can be placed on the specified player's inventory.
 * If 'persistItem' is 'True', the item is also placed in the inventory.
 * @param item The item to be checked.
 * @param persistItem Pass 'True' to actually place the item in the inventory. The default is 'False'.
 * @return 'True' in case the item can be placed on the player's inventory and 'False' otherwise.
 */
bool AutoPlaceItemInInventory(PlayerStruct &player, const ItemStruct &item, bool persistItem)
{
	Size itemSize = GetInventorySize(item);

	if (itemSize.Height == 1) {
		for (int i = 30; i <= 39; i++) {
			if (AutoPlaceItemInInventorySlot(player, i, item, persistItem))
				return true;
		}
		for (int x = 9; x >= 0; x--) {
			for (int y = 2; y >= 0; y--) {
				if (AutoPlaceItemInInventorySlot(player, 10 * y + x, item, persistItem))
					return true;
			}
		}
		return false;
	}

	if (itemSize.Height == 2) {
		for (int x = 10 - itemSize.Width; x >= 0; x -= itemSize.Width) {
			for (int y = 0; y < 3; y++) {
				if (AutoPlaceItemInInventorySlot(player, 10 * y + x, item, persistItem))
					return true;
			}
		}
		if (itemSize.Width == 2) {
			for (int x = 7; x >= 0; x -= 2) {
				for (int y = 0; y < 3; y++) {
					if (AutoPlaceItemInInventorySlot(player, 10 * y + x, item, persistItem))
						return true;
				}
			}
		}
		return false;
	}

	if (itemSize.Width == 1 && itemSize.Height == 3) {
		for (int i = 0; i < 20; i++) {
			if (AutoPlaceItemInInventorySlot(player, i, item, persistItem))
				return true;
		}
		return false;
	}

	if (itemSize.Width == 2 && itemSize.Height == 3) {
		for (int i = 0; i < 9; i++) {
			if (AutoPlaceItemInInventorySlot(player, i, item, persistItem))
				return true;
		}

		for (int i = 10; i < 19; i++) {
			if (AutoPlaceItemInInventorySlot(player, i, item, persistItem))
				return true;
		}
		return false;
	}

	app_fatal("Unknown item size: %ix%i", itemSize.Width, itemSize.Height);
}

/**
 * @brief Checks whether the given item can be placed on the specified player's inventory slot.
 * If 'persistItem' is 'True', the item is also placed in the inventory slot.
 * @param slotIndex The 0-based index of the slot to put the item on.
 * @param item The item to be checked.
 * @param persistItem Pass 'True' to actually place the item in the inventory slot. The default is 'False'.
 * @return 'True' in case the item can be placed on the specified player's inventory slot and 'False' otherwise.
 */
bool AutoPlaceItemInInventorySlot(PlayerStruct &player, int slotIndex, const ItemStruct &item, bool persistItem)
{
	int yy = (slotIndex > 0) ? (10 * (slotIndex / 10)) : 0;

	Size itemSize = GetInventorySize(item);
	for (int j = 0; j < itemSize.Height; j++) {
		if (yy >= NUM_INV_GRID_ELEM) {
			return false;
		}
		int xx = (slotIndex > 0) ? (slotIndex % 10) : 0;
		for (int i = 0; i < itemSize.Width; i++) {
			if (xx >= 10 || player.InvGrid[xx + yy] != 0) {
				return false;
			}
			xx++;
		}
		yy += 10;
	}

	if (persistItem) {
		player.InvList[player._pNumInv] = player.HoldItem;
		player._pNumInv++;

		AddItemToInvGrid(player, slotIndex, player._pNumInv, itemSize.Width, itemSize.Height);
		player.CalcScrolls();
	}

	return true;
}

bool GoldAutoPlace(PlayerStruct &player)
{
	bool done = false;

	for (int i = 0; i < player._pNumInv && !done; i++) {
		if (player.InvList[i]._itype != ITYPE_GOLD)
			continue;
		if (player.InvList[i]._ivalue >= MaxGold)
			continue;

		player.InvList[i]._ivalue += player.HoldItem._ivalue;
		if (player.InvList[i]._ivalue > MaxGold) {
			player.HoldItem._ivalue = player.InvList[i]._ivalue - MaxGold;
			SetPlrHandGoldCurs(&player.HoldItem);
			player.InvList[i]._ivalue = MaxGold;
			if (gbIsHellfire)
				GetPlrHandSeed(&player.HoldItem);
		} else {
			player.HoldItem._ivalue = 0;
			done = true;
		}

		SetPlrHandGoldCurs(&player.InvList[i]);
		player._pGold = CalculateGold(player);
	}

	for (int i = 39; i >= 30 && !done; i--) {
		done = GoldAutoPlaceInInventorySlot(player, i);
	}
	for (int x = 9; x >= 0 && !done; x--) {
		for (int y = 2; y >= 0 && !done; y--) {
			done = GoldAutoPlaceInInventorySlot(player, 10 * y + x);
		}
	}

	return done;
}

bool GoldAutoPlaceInInventorySlot(PlayerStruct &player, int slotIndex)
{
	int yy = 10 * (slotIndex / 10);
	int xx = slotIndex % 10;

	if (player.InvGrid[xx + yy] != 0) {
		return false;
	}

	int ii = player._pNumInv;
	player.InvList[ii] = player.HoldItem;
	player._pNumInv = player._pNumInv + 1;
	player.InvGrid[xx + yy] = player._pNumInv;
	GetPlrHandSeed(&player.InvList[ii]);

	int gold = player.HoldItem._ivalue;
	if (gold > MaxGold) {
		gold -= MaxGold;
		player.HoldItem._ivalue = gold;
		GetPlrHandSeed(&player.HoldItem);
		player.InvList[ii]._ivalue = MaxGold;
		return false;
	}

	player.HoldItem._ivalue = 0;
	player._pGold = CalculateGold(player);
	NewCursor(CURSOR_HAND);

	return true;
}

int SwapItem(ItemStruct *a, ItemStruct *b)
{
	std::swap(*a, *b);

	return b->_iCurs + CURSOR_FIRSTITEM;
}

void CheckInvPaste(int pnum, Point cursorPosition)
{
	auto &player = plr[pnum];

	SetICursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
	int i = cursorPosition.x + (icursW / 2);
	int j = cursorPosition.y + (icursH / 2);
	int sx = icursW28;
	int sy = icursH28;
	bool done = false;
	int r = 0;
	for (; r < NUM_XY_SLOTS && !done; r++) {
		int xo = RIGHT_PANEL;
		int yo = 0;
		if (r >= SLOTXY_BELT_FIRST) {
			xo = PANEL_LEFT;
			yo = PANEL_TOP;
		}

		if (i >= InvRect[r].x + xo && i <= InvRect[r].x + xo + INV_SLOT_SIZE_PX) {
			if (j >= InvRect[r].y + yo - INV_SLOT_SIZE_PX - 1 && j < InvRect[r].y + yo) {
				done = true;
				r--;
			}
		}
		if (r == SLOTXY_CHEST_LAST) {
			if ((sx & 1) == 0)
				i -= 14;
			if ((sy & 1) == 0)
				j -= 14;
		}
		if (r == SLOTXY_INV_LAST && (sy & 1) == 0)
			j += 14;
	}
	if (!done)
		return;

	item_equip_type il = ILOC_UNEQUIPABLE;
	if (r >= SLOTXY_HEAD_FIRST && r <= SLOTXY_HEAD_LAST)
		il = ILOC_HELM;
	if (r >= SLOTXY_RING_LEFT && r <= SLOTXY_RING_RIGHT)
		il = ILOC_RING;
	if (r == SLOTXY_AMULET)
		il = ILOC_AMULET;
	if (r >= SLOTXY_HAND_LEFT_FIRST && r <= SLOTXY_HAND_RIGHT_LAST)
		il = ILOC_ONEHAND;
	if (r >= SLOTXY_CHEST_FIRST && r <= SLOTXY_CHEST_LAST)
		il = ILOC_ARMOR;
	if (r >= SLOTXY_BELT_FIRST && r <= SLOTXY_BELT_LAST)
		il = ILOC_BELT;

	done = player.HoldItem._iLoc == il;

	if (il == ILOC_ONEHAND && player.HoldItem._iLoc == ILOC_TWOHAND) {
		if (player._pClass == HeroClass::Barbarian
		    && (player.HoldItem._itype == ITYPE_SWORD || player.HoldItem._itype == ITYPE_MACE))
			il = ILOC_ONEHAND;
		else
			il = ILOC_TWOHAND;
		done = true;
	}
	if (player.HoldItem._iLoc == ILOC_UNEQUIPABLE && il == ILOC_BELT) {
		if (sx == 1 && sy == 1) {
			done = true;
			if (!AllItemsList[player.HoldItem.IDidx].iUsable)
				done = false;
			if (!player.HoldItem._iStatFlag)
				done = false;
			if (player.HoldItem._itype == ITYPE_GOLD)
				done = false;
		}
	}

	int it = 0;
	if (il == ILOC_UNEQUIPABLE) {
		done = true;
		int ii = r - SLOTXY_INV_FIRST;
		if (player.HoldItem._itype == ITYPE_GOLD) {
			int yy = 10 * (ii / 10);
			int xx = ii % 10;
			if (player.InvGrid[xx + yy] != 0) {
				int iv = player.InvGrid[xx + yy];
				if (iv > 0) {
					if (player.InvList[iv - 1]._itype != ITYPE_GOLD) {
						it = iv;
					}
				} else {
					it = -iv;
				}
			}
		} else {
			int yy = 10 * ((ii / 10) - ((sy - 1) / 2));
			if (yy < 0)
				yy = 0;
			for (j = 0; j < sy && done; j++) {
				if (yy >= NUM_INV_GRID_ELEM)
					done = false;
				int xx = (ii % 10) - ((sx - 1) / 2);
				if (xx < 0)
					xx = 0;
				for (i = 0; i < sx && done; i++) {
					if (xx >= 10) {
						done = false;
					} else {
						if (player.InvGrid[xx + yy] != 0) {
							int iv = player.InvGrid[xx + yy];
							if (iv < 0)
								iv = -iv;
							if (it != 0) {
								if (it != iv)
									done = false;
							} else {
								it = iv;
							}
						}
					}
					xx++;
				}
				yy += 10;
			}
		}
	}

	if (!done)
		return;

	if (il != ILOC_UNEQUIPABLE && il != ILOC_BELT && !player.HoldItem._iStatFlag) {
		done = false;
		player.Say(HeroSpeech::ICantUseThisYet);
	}

	if (!done)
		return;

	if (pnum == myplr)
		PlaySFX(ItemInvSnds[ItemCAnimTbl[player.HoldItem._iCurs]]);

	int cn = CURSOR_HAND;
	switch (il) {
	case ILOC_HELM:
		NetSendCmdChItem(false, INVLOC_HEAD);
		if (player.InvBody[INVLOC_HEAD].isEmpty())
			player.InvBody[INVLOC_HEAD] = player.HoldItem;
		else
			cn = SwapItem(&player.InvBody[INVLOC_HEAD], &player.HoldItem);
		break;
	case ILOC_RING:
		if (r == SLOTXY_RING_LEFT) {
			NetSendCmdChItem(false, INVLOC_RING_LEFT);
			if (player.InvBody[INVLOC_RING_LEFT].isEmpty())
				player.InvBody[INVLOC_RING_LEFT] = player.HoldItem;
			else
				cn = SwapItem(&player.InvBody[INVLOC_RING_LEFT], &player.HoldItem);
		} else {
			NetSendCmdChItem(false, INVLOC_RING_RIGHT);
			if (player.InvBody[INVLOC_RING_RIGHT].isEmpty())
				player.InvBody[INVLOC_RING_RIGHT] = player.HoldItem;
			else
				cn = SwapItem(&player.InvBody[INVLOC_RING_RIGHT], &player.HoldItem);
		}
		break;
	case ILOC_AMULET:
		NetSendCmdChItem(false, INVLOC_AMULET);
		if (player.InvBody[INVLOC_AMULET].isEmpty())
			player.InvBody[INVLOC_AMULET] = player.HoldItem;
		else
			cn = SwapItem(&player.InvBody[INVLOC_AMULET], &player.HoldItem);
		break;
	case ILOC_ONEHAND:
		if (r <= SLOTXY_HAND_LEFT_LAST) {
			if (player.InvBody[INVLOC_HAND_LEFT].isEmpty()) {
				if ((player.InvBody[INVLOC_HAND_RIGHT].isEmpty() || player.InvBody[INVLOC_HAND_RIGHT]._iClass != player.HoldItem._iClass)
				    || (player._pClass == HeroClass::Bard && player.InvBody[INVLOC_HAND_RIGHT]._iClass == ICLASS_WEAPON && player.HoldItem._iClass == ICLASS_WEAPON)) {
					NetSendCmdChItem(false, INVLOC_HAND_LEFT);
					player.InvBody[INVLOC_HAND_LEFT] = player.HoldItem;
				} else {
					NetSendCmdChItem(false, INVLOC_HAND_RIGHT);
					cn = SwapItem(&player.InvBody[INVLOC_HAND_RIGHT], &player.HoldItem);
				}
				break;
			}
			if ((player.InvBody[INVLOC_HAND_RIGHT].isEmpty() || player.InvBody[INVLOC_HAND_RIGHT]._iClass != player.HoldItem._iClass)
			    || (player._pClass == HeroClass::Bard && player.InvBody[INVLOC_HAND_RIGHT]._iClass == ICLASS_WEAPON && player.HoldItem._iClass == ICLASS_WEAPON)) {
				NetSendCmdChItem(false, INVLOC_HAND_LEFT);
				cn = SwapItem(&player.InvBody[INVLOC_HAND_LEFT], &player.HoldItem);
				break;
			}

			NetSendCmdChItem(false, INVLOC_HAND_RIGHT);
			cn = SwapItem(&player.InvBody[INVLOC_HAND_RIGHT], &player.HoldItem);
			break;
		}
		if (player.InvBody[INVLOC_HAND_RIGHT].isEmpty()) {
			if ((player.InvBody[INVLOC_HAND_LEFT].isEmpty() || player.InvBody[INVLOC_HAND_LEFT]._iLoc != ILOC_TWOHAND)
			    || (player._pClass == HeroClass::Barbarian && (player.InvBody[INVLOC_HAND_LEFT]._itype == ITYPE_SWORD || player.InvBody[INVLOC_HAND_LEFT]._itype == ITYPE_MACE))) {
				if ((player.InvBody[INVLOC_HAND_LEFT].isEmpty() || player.InvBody[INVLOC_HAND_LEFT]._iClass != player.HoldItem._iClass)
				    || (player._pClass == HeroClass::Bard && player.InvBody[INVLOC_HAND_LEFT]._iClass == ICLASS_WEAPON && player.HoldItem._iClass == ICLASS_WEAPON)) {
					NetSendCmdChItem(false, INVLOC_HAND_RIGHT);
					player.InvBody[INVLOC_HAND_RIGHT] = player.HoldItem;
					break;
				}
				NetSendCmdChItem(false, INVLOC_HAND_LEFT);
				cn = SwapItem(&player.InvBody[INVLOC_HAND_LEFT], &player.HoldItem);
				break;
			}
			NetSendCmdDelItem(false, INVLOC_HAND_LEFT);
			NetSendCmdChItem(false, INVLOC_HAND_RIGHT);
			SwapItem(&player.InvBody[INVLOC_HAND_RIGHT], &player.InvBody[INVLOC_HAND_LEFT]);
			cn = SwapItem(&player.InvBody[INVLOC_HAND_RIGHT], &player.HoldItem);
			break;
		}

		if ((!player.InvBody[INVLOC_HAND_LEFT].isEmpty() && player.InvBody[INVLOC_HAND_LEFT]._iClass == player.HoldItem._iClass)
		    && !(player._pClass == HeroClass::Bard && player.InvBody[INVLOC_HAND_LEFT]._iClass == ICLASS_WEAPON && player.HoldItem._iClass == ICLASS_WEAPON)) {
			NetSendCmdChItem(false, INVLOC_HAND_LEFT);
			cn = SwapItem(&player.InvBody[INVLOC_HAND_LEFT], &player.HoldItem);
			break;
		}
		NetSendCmdChItem(false, INVLOC_HAND_RIGHT);
		cn = SwapItem(&player.InvBody[INVLOC_HAND_RIGHT], &player.HoldItem);
		break;
	case ILOC_TWOHAND:
		if (!player.InvBody[INVLOC_HAND_LEFT].isEmpty() && !player.InvBody[INVLOC_HAND_RIGHT].isEmpty()) {
			ItemStruct tempitem = player.HoldItem;
			if (player.InvBody[INVLOC_HAND_RIGHT]._itype == ITYPE_SHIELD)
				player.HoldItem = player.InvBody[INVLOC_HAND_RIGHT];
			else
				player.HoldItem = player.InvBody[INVLOC_HAND_LEFT];
			if (pnum == myplr)
				NewCursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
			else
				SetICursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
			bool done2h = AutoPlaceItemInInventory(player, player.HoldItem, true);
			player.HoldItem = tempitem;
			if (pnum == myplr)
				NewCursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
			else
				SetICursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
			if (!done2h)
				return;

			if (player.InvBody[INVLOC_HAND_RIGHT]._itype == ITYPE_SHIELD)
				player.InvBody[INVLOC_HAND_RIGHT]._itype = ITYPE_NONE;
			else
				player.InvBody[INVLOC_HAND_LEFT]._itype = ITYPE_NONE;
		}

		NetSendCmdDelItem(false, INVLOC_HAND_RIGHT);

		if (!player.InvBody[INVLOC_HAND_LEFT].isEmpty() || !player.InvBody[INVLOC_HAND_RIGHT].isEmpty()) {
			NetSendCmdChItem(false, INVLOC_HAND_LEFT);
			if (player.InvBody[INVLOC_HAND_LEFT].isEmpty())
				SwapItem(&player.InvBody[INVLOC_HAND_LEFT], &player.InvBody[INVLOC_HAND_RIGHT]);
			cn = SwapItem(&player.InvBody[INVLOC_HAND_LEFT], &player.HoldItem);
		} else {
			NetSendCmdChItem(false, INVLOC_HAND_LEFT);
			player.InvBody[INVLOC_HAND_LEFT] = player.HoldItem;
		}
		if (player.InvBody[INVLOC_HAND_LEFT]._itype == ITYPE_STAFF && player.InvBody[INVLOC_HAND_LEFT]._iSpell != SPL_NULL && player.InvBody[INVLOC_HAND_LEFT]._iCharges > 0) {
			player._pRSpell = player.InvBody[INVLOC_HAND_LEFT]._iSpell;
			player._pRSplType = RSPLTYPE_CHARGES;
			force_redraw = 255;
		}
		break;
	case ILOC_ARMOR:
		NetSendCmdChItem(false, INVLOC_CHEST);
		if (player.InvBody[INVLOC_CHEST].isEmpty())
			player.InvBody[INVLOC_CHEST] = player.HoldItem;
		else
			cn = SwapItem(&player.InvBody[INVLOC_CHEST], &player.HoldItem);
		break;
	case ILOC_UNEQUIPABLE:
		if (player.HoldItem._itype == ITYPE_GOLD && it == 0) {
			int ii = r - SLOTXY_INV_FIRST;
			int yy = 10 * (ii / 10);
			int xx = ii % 10;
			if (player.InvGrid[yy + xx] > 0) {
				int il = player.InvGrid[yy + xx] - 1;
				int gt = player.InvList[il]._ivalue;
				int ig = player.HoldItem._ivalue + gt;
				if (ig <= MaxGold) {
					player.InvList[il]._ivalue = ig;
					player._pGold += player.HoldItem._ivalue;
					SetPlrHandGoldCurs(&player.InvList[il]);
				} else {
					ig = MaxGold - gt;
					player._pGold += ig;
					player.HoldItem._ivalue -= ig;
					player.InvList[il]._ivalue = MaxGold;
					player.InvList[il]._iCurs = ICURS_GOLD_LARGE;
					// BUGFIX: incorrect values here are leftover from beta (fixed)
					cn = GetGoldCursor(player.HoldItem._ivalue);
					cn += CURSOR_FIRSTITEM;
				}
			} else {
				int il = player._pNumInv;
				player.InvList[il] = player.HoldItem;
				player._pNumInv++;
				player.InvGrid[yy + xx] = player._pNumInv;
				player._pGold += player.HoldItem._ivalue;
				SetPlrHandGoldCurs(&player.InvList[il]);
			}
		} else {
			if (it == 0) {
				player.InvList[player._pNumInv] = player.HoldItem;
				player._pNumInv++;
				it = player._pNumInv;
			} else {
				int il = it - 1;
				if (player.HoldItem._itype == ITYPE_GOLD)
					player._pGold += player.HoldItem._ivalue;
				cn = SwapItem(&player.InvList[il], &player.HoldItem);
				if (player.HoldItem._itype == ITYPE_GOLD)
					player._pGold = CalculateGold(player);
				for (i = 0; i < NUM_INV_GRID_ELEM; i++) {
					if (player.InvGrid[i] == it)
						player.InvGrid[i] = 0;
					if (player.InvGrid[i] == -it)
						player.InvGrid[i] = 0;
				}
			}
			int ii = r - SLOTXY_INV_FIRST;

			// Calculate top-left position of item for InvGrid and then add item to InvGrid

			int xx = std::max(ii % 10 - ((sx - 1) / 2), 0);
			int yy = std::max(10 * (ii / 10 - ((sy - 1) / 2)), 0);
			AddItemToInvGrid(player, xx + yy, it, sx, sy);
		}
		break;
	case ILOC_BELT: {
		int ii = r - SLOTXY_BELT_FIRST;
		if (player.HoldItem._itype == ITYPE_GOLD) {
			if (!player.SpdList[ii].isEmpty()) {
				if (player.SpdList[ii]._itype == ITYPE_GOLD) {
					i = player.HoldItem._ivalue + player.SpdList[ii]._ivalue;
					if (i <= MaxGold) {
						player.SpdList[ii]._ivalue = i;
						player._pGold += player.HoldItem._ivalue;
						SetPlrHandGoldCurs(&player.SpdList[ii]);
					} else {
						i = MaxGold - player.SpdList[ii]._ivalue;
						player._pGold += i;
						player.HoldItem._ivalue -= i;
						player.SpdList[ii]._ivalue = MaxGold;
						player.SpdList[ii]._iCurs = ICURS_GOLD_LARGE;

						// BUGFIX: incorrect values here are leftover from beta (fixed)
						cn = GetGoldCursor(player.HoldItem._ivalue);
						cn += CURSOR_FIRSTITEM;
					}
				} else {
					player._pGold += player.HoldItem._ivalue;
					cn = SwapItem(&player.SpdList[ii], &player.HoldItem);
				}
			} else {
				player.SpdList[ii] = player.HoldItem;
				player._pGold += player.HoldItem._ivalue;
			}
		} else if (player.SpdList[ii].isEmpty()) {
			player.SpdList[ii] = player.HoldItem;
		} else {
			cn = SwapItem(&player.SpdList[ii], &player.HoldItem);
			if (player.HoldItem._itype == ITYPE_GOLD)
				player._pGold = CalculateGold(player);
		}
		drawsbarflag = true;
	} break;
	case ILOC_NONE:
	case ILOC_INVALID:
		break;
	}
	CalcPlrInv(pnum, true);
	if (pnum == myplr) {
		if (cn == CURSOR_HAND)
			SetCursorPos(MouseX + (cursW / 2), MouseY + (cursH / 2));
		NewCursor(cn);
	}
}

void CheckInvSwap(int pnum, BYTE bLoc, int idx, uint16_t wCI, int seed, bool bId, uint32_t dwBuff)
{
	memset(&items[MAXITEMS], 0, sizeof(*items));
	RecreateItem(MAXITEMS, idx, wCI, seed, 0, (dwBuff & CF_HELLFIRE) != 0);

	auto &player = plr[pnum];

	player.HoldItem = items[MAXITEMS];

	if (bId) {
		player.HoldItem._iIdentified = true;
	}

	if (bLoc < NUM_INVLOC) {
		player.InvBody[bLoc] = player.HoldItem;

		if (bLoc == INVLOC_HAND_LEFT && player.HoldItem._iLoc == ILOC_TWOHAND) {
			player.InvBody[INVLOC_HAND_RIGHT]._itype = ITYPE_NONE;
		} else if (bLoc == INVLOC_HAND_RIGHT && player.HoldItem._iLoc == ILOC_TWOHAND) {
			player.InvBody[INVLOC_HAND_LEFT]._itype = ITYPE_NONE;
		}
	}

	CalcPlrInv(pnum, true);
}

void CheckInvCut(int pnum, Point cursorPosition, bool automaticMove)
{
	auto &player = plr[pnum];

	if (player._pmode > PM_WALK3) {
		return;
	}

	if (dropGoldFlag) {
		dropGoldFlag = false;
		dropGoldValue = 0;
	}

	bool done = false;

	int r = 0;
	for (; (DWORD)r < NUM_XY_SLOTS && !done; r++) {
		int xo = RIGHT_PANEL;
		int yo = 0;
		if (r >= SLOTXY_BELT_FIRST) {
			xo = PANEL_LEFT;
			yo = PANEL_TOP;
		}

		// check which inventory rectangle the mouse is in, if any
		if (cursorPosition.x >= InvRect[r].x + xo
		    && cursorPosition.x < InvRect[r].x + xo + (INV_SLOT_SIZE_PX + 1)
		    && cursorPosition.y >= InvRect[r].y + yo - (INV_SLOT_SIZE_PX + 1)
		    && cursorPosition.y < InvRect[r].y + yo) {
			done = true;
			r--;
		}
	}

	if (!done) {
		// not on an inventory slot rectangle
		return;
	}

	ItemStruct &holdItem = player.HoldItem;
	holdItem._itype = ITYPE_NONE;

	bool automaticallyMoved = false;
	bool automaticallyEquipped = false;
	bool automaticallyUnequip = false;

	ItemStruct &headItem = player.InvBody[INVLOC_HEAD];
	if (r >= SLOTXY_HEAD_FIRST && r <= SLOTXY_HEAD_LAST && !headItem.isEmpty()) {
		holdItem = headItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_HEAD);
			headItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &leftRingItem = player.InvBody[INVLOC_RING_LEFT];
	if (r == SLOTXY_RING_LEFT && !leftRingItem.isEmpty()) {
		holdItem = leftRingItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_RING_LEFT);
			leftRingItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &rightRingItem = player.InvBody[INVLOC_RING_RIGHT];
	if (r == SLOTXY_RING_RIGHT && !rightRingItem.isEmpty()) {
		holdItem = rightRingItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_RING_RIGHT);
			rightRingItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &amuletItem = player.InvBody[INVLOC_AMULET];
	if (r == SLOTXY_AMULET && !amuletItem.isEmpty()) {
		holdItem = amuletItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_AMULET);
			amuletItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &leftHandItem = player.InvBody[INVLOC_HAND_LEFT];
	if (r >= SLOTXY_HAND_LEFT_FIRST && r <= SLOTXY_HAND_LEFT_LAST && !leftHandItem.isEmpty()) {
		holdItem = leftHandItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_HAND_LEFT);
			leftHandItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &rightHandItem = player.InvBody[INVLOC_HAND_RIGHT];
	if (r >= SLOTXY_HAND_RIGHT_FIRST && r <= SLOTXY_HAND_RIGHT_LAST && !rightHandItem.isEmpty()) {
		holdItem = rightHandItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_HAND_RIGHT);
			rightHandItem._itype = ITYPE_NONE;
		}
	}

	ItemStruct &chestItem = player.InvBody[INVLOC_CHEST];
	if (r >= SLOTXY_CHEST_FIRST && r <= SLOTXY_CHEST_LAST && !chestItem.isEmpty()) {
		holdItem = chestItem;
		if (automaticMove) {
			automaticallyUnequip = true;
			automaticallyMoved = automaticallyEquipped = AutoPlaceItemInInventory(player, holdItem, true);
		}

		if (!automaticMove || automaticallyMoved) {
			NetSendCmdDelItem(false, INVLOC_CHEST);
			chestItem._itype = ITYPE_NONE;
		}
	}

	if (r >= SLOTXY_INV_FIRST && r <= SLOTXY_INV_LAST) {
		int ig = r - SLOTXY_INV_FIRST;
		int ii = player.InvGrid[ig];
		if (ii != 0) {
			int iv = (ii < 0) ? -ii : ii;

			holdItem = player.InvList[iv - 1];
			if (automaticMove) {
				if (CanBePlacedOnBelt(holdItem)) {
					automaticallyMoved = AutoPlaceItemInBelt(player, holdItem, true);
				} else {
					automaticallyMoved = automaticallyEquipped = AutoEquip(pnum, holdItem);
				}
			}

			if (!automaticMove || automaticallyMoved) {
				player.RemoveInvItem(iv - 1, false);
			}
		}
	}

	if (r >= SLOTXY_BELT_FIRST) {
		ItemStruct &beltItem = player.SpdList[r - SLOTXY_BELT_FIRST];
		if (!beltItem.isEmpty()) {
			holdItem = beltItem;
			if (automaticMove) {
				automaticallyMoved = AutoPlaceItemInInventory(player, holdItem, true);
			}

			if (!automaticMove || automaticallyMoved) {
				beltItem._itype = ITYPE_NONE;
				drawsbarflag = true;
			}
		}
	}

	if (!holdItem.isEmpty()) {
		if (holdItem._itype == ITYPE_GOLD) {
			player._pGold = CalculateGold(player);
		}

		CalcPlrInv(pnum, true);
		CheckItemStats(player);

		if (pnum == myplr) {
			if (automaticallyEquipped) {
				PlaySFX(ItemInvSnds[ItemCAnimTbl[holdItem._iCurs]]);
			} else if (!automaticMove || automaticallyMoved) {
				PlaySFX(IS_IGRAB);
			}

			if (automaticMove) {
				if (!automaticallyMoved) {
					if (CanBePlacedOnBelt(holdItem) || automaticallyUnequip) {
						player.SaySpecific(HeroSpeech::IHaveNoRoom);
					} else {
						player.SaySpecific(HeroSpeech::ICantDoThat);
					}
				}

				holdItem._itype = ITYPE_NONE;
			} else {
				NewCursor(holdItem._iCurs + CURSOR_FIRSTITEM);
				SetCursorPos(cursorPosition.x - (cursW / 2), MouseY - (cursH / 2));
			}
		}
	}
}

void inv_update_rem_item(int pnum, BYTE iv)
{
	auto &player = plr[pnum];

	if (iv < NUM_INVLOC) {
		player.InvBody[iv]._itype = ITYPE_NONE;
	}

	CalcPlrInv(pnum, player._pmode != PM_DEATH);
}

void CheckInvItem(bool isShiftHeld)
{
	if (pcurs >= CURSOR_FIRSTITEM) {
		CheckInvPaste(myplr, { MouseX, MouseY });
	} else {
		CheckInvCut(myplr, { MouseX, MouseY }, isShiftHeld);
	}
}

/**
 * Check for interactions with belt
 */
void CheckInvScrn(bool isShiftHeld)
{
	if (MouseX > 190 + PANEL_LEFT && MouseX < 437 + PANEL_LEFT
	    && MouseY > PANEL_TOP && MouseY < 33 + PANEL_TOP) {
		CheckInvItem(isShiftHeld);
	}
}

void CheckItemStats(PlayerStruct &player)
{
	ItemStruct &item = player.HoldItem;

	item._iStatFlag = false;

	if (player._pStrength >= item._iMinStr
	    && player._pMagic >= item._iMinMag
	    && player._pDexterity >= item._iMinDex) {
		item._iStatFlag = true;
	}
}

static void CheckBookLevel(PlayerStruct &player)
{
	if (player.HoldItem._iMiscId != IMISC_BOOK)
		return;

	player.HoldItem._iMinMag = spelldata[player.HoldItem._iSpell].sMinInt;
	int slvl = player._pSplLvl[player.HoldItem._iSpell];
	while (slvl != 0) {
		player.HoldItem._iMinMag += 20 * player.HoldItem._iMinMag / 100;
		slvl--;
		if (player.HoldItem._iMinMag + 20 * player.HoldItem._iMinMag / 100 > 255) {
			player.HoldItem._iMinMag = -1;
			slvl = 0;
		}
	}
}

static void CheckNaKrulNotes(PlayerStruct &player)
{
	int idx = player.HoldItem.IDidx;

	if (idx != IDI_NOTE1 && idx != IDI_NOTE2 && idx != IDI_NOTE3) {
		return;
	}

	int n1;
	if (idx != IDI_NOTE1 && !player.HasItem(IDI_NOTE1, &n1)) {
		return;
	}

	int n2;
	if (idx != IDI_NOTE2 && !player.HasItem(IDI_NOTE2, &n2)) {
		return;
	}

	int n3;
	if (idx != IDI_NOTE3 && !player.HasItem(IDI_NOTE3, &n3)) {
		return;
	}

	plr[myplr].Say(HeroSpeech::JustWhatIWasLookingFor, 10);

	if (idx != IDI_NOTE1) {
		player.RemoveInvItem(n1);
	}
	if (idx != IDI_NOTE2) {
		player.RemoveInvItem(n2);
	}
	if (idx != IDI_NOTE3) {
		player.RemoveInvItem(n3);
	}

	int itemNum = itemactive[0];
	ItemStruct tmp = items[itemNum];
	memset(&items[itemNum], 0, sizeof(*items));
	GetItemAttrs(itemNum, IDI_FULLNOTE, 16);
	SetupItem(itemNum);
	player.HoldItem = items[itemNum];
	items[itemNum] = tmp;
}

static void CheckQuestItem(PlayerStruct &player)
{
	auto &myPlayer = plr[myplr];

	if (player.HoldItem.IDidx == IDI_OPTAMULET && quests[Q_BLIND]._qactive == QUEST_ACTIVE)
		quests[Q_BLIND]._qactive = QUEST_DONE;

	if (player.HoldItem.IDidx == IDI_MUSHROOM && quests[Q_MUSHROOM]._qactive == QUEST_ACTIVE && quests[Q_MUSHROOM]._qvar1 == QS_MUSHSPAWNED) {
		player.Say(HeroSpeech::NowThatsOneBigMushroom, 10); // BUGFIX: Voice for this quest might be wrong in MP
		quests[Q_MUSHROOM]._qvar1 = QS_MUSHPICKED;
	}

	if (player.HoldItem.IDidx == IDI_ANVIL && quests[Q_ANVIL]._qactive != QUEST_NOTAVAIL) {
		if (quests[Q_ANVIL]._qactive == QUEST_INIT) {
			quests[Q_ANVIL]._qactive = QUEST_ACTIVE;
		}
		if (quests[Q_ANVIL]._qlog) {
			myPlayer.Say(HeroSpeech::INeedToGetThisToGriswold, 10);
		}
	}

	if (player.HoldItem.IDidx == IDI_GLDNELIX && quests[Q_VEIL]._qactive != QUEST_NOTAVAIL) {
		myPlayer.Say(HeroSpeech::INeedToGetThisToLachdanan, 30);
	}

	if (player.HoldItem.IDidx == IDI_ROCK && quests[Q_ROCK]._qactive != QUEST_NOTAVAIL) {
		if (quests[Q_ROCK]._qactive == QUEST_INIT) {
			quests[Q_ROCK]._qactive = QUEST_ACTIVE;
		}
		if (quests[Q_ROCK]._qlog) {
			myPlayer.Say(HeroSpeech::ThisMustBeWhatGriswoldWanted, 10);
		}
	}

	if (player.HoldItem.IDidx == IDI_ARMOFVAL && quests[Q_BLOOD]._qactive == QUEST_ACTIVE) {
		quests[Q_BLOOD]._qactive = QUEST_DONE;
		myPlayer.Say(HeroSpeech::MayTheSpiritOfArkaineProtectMe, 20);
	}

	if (player.HoldItem.IDidx == IDI_MAPOFDOOM) {
		quests[Q_GRAVE]._qlog = false;
		quests[Q_GRAVE]._qactive = QUEST_ACTIVE;
		quests[Q_GRAVE]._qvar1 = 1;
		plr[myplr].Say(HeroSpeech::UhHuh, 10);
	}

	CheckNaKrulNotes(player);
}

void CleanupItems(ItemStruct *item, int ii)
{
	dItem[item->position.x][item->position.y] = 0;

	if (currlevel == 21 && item->position == CornerStone.position) {
		CornerStone.item._itype = ITYPE_NONE;
		CornerStone.item._iSelFlag = 0;
		CornerStone.item.position = { 0, 0 };
		CornerStone.item._iAnimFlag = false;
		CornerStone.item._iIdentified = false;
		CornerStone.item._iPostDraw = false;
	}

	int i = 0;
	while (i < numitems) {
		if (itemactive[i] == ii) {
			DeleteItem(itemactive[i], i);
			i = 0;
			continue;
		}

		i++;
	}
}

void InvGetItem(int pnum, ItemStruct *item, int ii)
{
	if (dropGoldFlag) {
		dropGoldFlag = false;
		dropGoldValue = 0;
	}

	if (dItem[item->position.x][item->position.y] == 0)
		return;

	auto &player = plr[pnum];

	if (myplr == pnum && pcurs >= CURSOR_FIRSTITEM)
		NetSendCmdPItem(true, CMD_SYNCPUTITEM, player.position.tile);

	item->_iCreateInfo &= ~CF_PREGEN;
	player.HoldItem = *item;
	CheckQuestItem(player);
	CheckBookLevel(player);
	CheckItemStats(player);
	bool cursorUpdated = false;
	if (player.HoldItem._itype == ITYPE_GOLD && GoldAutoPlace(player))
		cursorUpdated = true;
	CleanupItems(item, ii);
	pcursitem = -1;
	if (!cursorUpdated)
		NewCursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
}

void AutoGetItem(int pnum, ItemStruct *item, int ii)
{
	bool done;

	if (pcurs != CURSOR_HAND) {
		return;
	}

	if (dropGoldFlag) {
		dropGoldFlag = false;
		dropGoldValue = 0;
	}

	if (dItem[item->position.x][item->position.y] == 0)
		return;

	auto &player = plr[pnum];

	item->_iCreateInfo &= ~CF_PREGEN;
	player.HoldItem = *item; /// BUGFIX: overwrites cursor item, allowing for belt dupe bug
	CheckQuestItem(player);
	CheckBookLevel(player);
	CheckItemStats(player);
	SetICursor(player.HoldItem._iCurs + CURSOR_FIRSTITEM);
	if (player.HoldItem._itype == ITYPE_GOLD) {
		done = GoldAutoPlace(player);
		if (!done) {
			item->_ivalue = player.HoldItem._ivalue;
			SetPlrHandGoldCurs(item);
		}
	} else {
		done = AutoEquipEnabled(player, player.HoldItem) && AutoEquip(pnum, player.HoldItem);
		if (!done) {
			done = AutoPlaceItemInBelt(player, player.HoldItem, true);
		}
		if (!done) {
			done = AutoPlaceItemInInventory(player, player.HoldItem, true);
		}
	}

	if (done) {
		CleanupItems(&items[ii], ii);
		return;
	}

	if (pnum == myplr) {
		player.Say(HeroSpeech::ICantCarryAnymore);
	}
	player.HoldItem = *item;
	RespawnItem(item, true);
	NetSendCmdPItem(true, CMD_RESPAWNITEM, item->position);
	player.HoldItem._itype = ITYPE_NONE;
}

int FindGetItem(int idx, uint16_t ci, int iseed)
{
	if (numitems <= 0)
		return -1;

	int ii;
	int i = 0;
	while (true) {
		ii = itemactive[i];
		if (items[ii].IDidx == idx && items[ii]._iSeed == iseed && items[ii]._iCreateInfo == ci)
			break;

		i++;

		if (i >= numitems)
			return -1;
	}

	return ii;
}

void SyncGetItem(Point position, int idx, uint16_t ci, int iseed)
{
	int ii;

	if (dItem[position.x][position.y] != 0) {
		ii = dItem[position.x][position.y] - 1;
		if (items[ii].IDidx == idx
		    && items[ii]._iSeed == iseed
		    && items[ii]._iCreateInfo == ci) {
			FindGetItem(idx, ci, iseed);
		} else {
			ii = FindGetItem(idx, ci, iseed);
		}
	} else {
		ii = FindGetItem(idx, ci, iseed);
	}

	if (ii == -1)
		return;

	CleanupItems(&items[ii], ii);
	assert(FindGetItem(idx, ci, iseed) == -1);
}

bool CanPut(Point position)
{
	if (dItem[position.x][position.y] != 0)
		return false;
	if (nSolidTable[dPiece[position.x][position.y]])
		return false;

	if (dObject[position.x][position.y] != 0) {
		if (object[dObject[position.x][position.y] > 0 ? dObject[position.x][position.y] - 1 : -(dObject[position.x][position.y] + 1)]._oSolidFlag)
			return false;
	}

	int8_t oi = dObject[position.x + 1][position.y + 1];
	if (oi > 0 && object[oi - 1]._oSelFlag != 0) {
		return false;
	}
	if (oi < 0 && object[-(oi + 1)]._oSelFlag != 0) {
		return false;
	}

	oi = dObject[position.x + 1][position.y];
	if (oi > 0) {
		int8_t oi2 = dObject[position.x][position.y + 1];
		if (oi2 > 0 && object[oi - 1]._oSelFlag != 0 && object[oi2 - 1]._oSelFlag != 0)
			return false;
	}

	if (currlevel == 0 && dMonster[position.x][position.y] != 0)
		return false;
	if (currlevel == 0 && dMonster[position.x + 1][position.y + 1] != 0)
		return false;

	return true;
}

bool TryInvPut()
{
	if (numitems >= MAXITEMS)
		return false;

	auto &myPlayer = plr[myplr];

	Direction dir = GetDirection(myPlayer.position.tile, { cursmx, cursmy });
	if (CanPut(myPlayer.position.tile + dir)) {
		return true;
	}

	if (CanPut(myPlayer.position.tile + left[dir])) {
		return true;
	}

	if (CanPut(myPlayer.position.tile + right[dir])) {
		return true;
	}

	return CanPut(myPlayer.position.tile);
}

void DrawInvMsg(const char *msg)
{
	uint32_t dwTicks = SDL_GetTicks();
	if (dwTicks - sgdwLastTime >= 5000) {
		sgdwLastTime = dwTicks;
		ErrorPlrMsg(msg);
	}
}

static bool PutItem(PlayerStruct &player, Point &position)
{
	if (numitems >= MAXITEMS)
		return false;

	auto relativePosition = position - player.position.tile;

	Direction d = GetDirection(player.position.tile, position);

	if (abs(relativePosition.x) > 1 || abs(relativePosition.y) > 1) {
		position = player.position.tile + d;
	}
	if (CanPut(position))
		return true;

	position = player.position.tile + left[d];
	if (CanPut(position))
		return true;

	position = player.position.tile + right[d];
	if (CanPut(position))
		return true;

	for (int l = 1; l < 50; l++) {
		for (int j = -l; j <= l; j++) {
			int yp = j + player.position.tile.y;
			for (int i = -l; i <= l; i++) {
				int xp = i + player.position.tile.x;
				if (!CanPut({ xp, yp }))
					continue;

				position = { xp, yp };
				return true;
			}
		}
	}

	return false;
}

int InvPutItem(PlayerStruct &player, Point position)
{
	if (!PutItem(player, position))
		return -1;

	if (currlevel == 0) {
		int yp = cursmy;
		int xp = cursmx;
		if (player.HoldItem._iCurs == ICURS_RUNE_BOMB && xp >= 79 && xp <= 82 && yp >= 61 && yp <= 64) {
			Point relativePosition = position - player.position.tile;
			NetSendCmdLocParam2(false, CMD_OPENHIVE, player.position.tile, relativePosition.x, relativePosition.y);
			quests[Q_FARMER]._qactive = QUEST_DONE;
			if (gbIsMultiplayer) {
				NetSendCmdQuest(true, Q_FARMER);
				return -1;
			}
			return -1;
		}
		if (player.HoldItem.IDidx == IDI_MAPOFDOOM && xp >= 35 && xp <= 38 && yp >= 20 && yp <= 24) {
			NetSendCmd(false, CMD_OPENCRYPT);
			quests[Q_GRAVE]._qactive = QUEST_DONE;
			if (gbIsMultiplayer) {
				NetSendCmdQuest(true, Q_GRAVE);
			}
			return -1;
		}
	}

	assert(CanPut(position));

	int ii = AllocateItem();

	dItem[position.x][position.y] = ii + 1;
	items[ii] = player.HoldItem;
	items[ii].position = position;
	RespawnItem(&items[ii], true);

	if (currlevel == 21 && position == CornerStone.position) {
		CornerStone.item = items[ii];
		InitQTextMsg(TEXT_CORNSTN);
		quests[Q_CORNSTN]._qlog = false;
		quests[Q_CORNSTN]._qactive = QUEST_DONE;
	}

	NewCursor(CURSOR_HAND);
	return ii;
}

int SyncPutItem(PlayerStruct &player, Point position, int idx, uint16_t icreateinfo, int iseed, int id, int dur, int mdur, int ch, int mch, int ivalue, DWORD ibuff, int toHit, int maxDam, int minStr, int minMag, int minDex, int ac)
{
	if (!PutItem(player, position))
		return -1;

	assert(CanPut(position));

	int ii = AllocateItem();

	dItem[position.x][position.y] = ii + 1;

	if (idx == IDI_EAR) {
		RecreateEar(ii, icreateinfo, iseed, id, dur, mdur, ch, mch, ivalue, ibuff);
	} else {
		RecreateItem(ii, idx, icreateinfo, iseed, ivalue, (ibuff & CF_HELLFIRE) != 0);
		if (id != 0)
			items[ii]._iIdentified = true;
		items[ii]._iDurability = dur;
		items[ii]._iMaxDur = mdur;
		items[ii]._iCharges = ch;
		items[ii]._iMaxCharges = mch;
		items[ii]._iPLToHit = toHit;
		items[ii]._iMaxDam = maxDam;
		items[ii]._iMinStr = minStr;
		items[ii]._iMinMag = minMag;
		items[ii]._iMinDex = minDex;
		items[ii]._iAC = ac;
		items[ii].dwBuff = ibuff;
	}

	items[ii].position = position;
	RespawnItem(&items[ii], true);

	if (currlevel == 21 && position == CornerStone.position) {
		CornerStone.item = items[ii];
		InitQTextMsg(TEXT_CORNSTN);
		quests[Q_CORNSTN]._qlog = false;
		quests[Q_CORNSTN]._qactive = QUEST_DONE;
	}
	return ii;
}

char CheckInvHLight()
{
	int r = 0;
	for (; (DWORD)r < NUM_XY_SLOTS; r++) {
		int xo = RIGHT_PANEL;
		int yo = 0;
		if (r >= SLOTXY_BELT_FIRST) {
			xo = PANEL_LEFT;
			yo = PANEL_TOP;
		}

		if (MouseX >= InvRect[r].x + xo
		    && MouseX < InvRect[r].x + xo + (INV_SLOT_SIZE_PX + 1)
		    && MouseY >= InvRect[r].y + yo - (INV_SLOT_SIZE_PX + 1)
		    && MouseY < InvRect[r].y + yo) {
			break;
		}
	}

	if ((DWORD)r >= NUM_XY_SLOTS)
		return -1;

	int8_t rv = -1;
	infoclr = UIS_SILVER;
	ItemStruct *pi = nullptr;
	auto &myPlayer = plr[myplr];

	ClearPanel();
	if (r >= SLOTXY_HEAD_FIRST && r <= SLOTXY_HEAD_LAST) {
		rv = INVLOC_HEAD;
		pi = &myPlayer.InvBody[rv];
	} else if (r == SLOTXY_RING_LEFT) {
		rv = INVLOC_RING_LEFT;
		pi = &myPlayer.InvBody[rv];
	} else if (r == SLOTXY_RING_RIGHT) {
		rv = INVLOC_RING_RIGHT;
		pi = &myPlayer.InvBody[rv];
	} else if (r == SLOTXY_AMULET) {
		rv = INVLOC_AMULET;
		pi = &myPlayer.InvBody[rv];
	} else if (r >= SLOTXY_HAND_LEFT_FIRST && r <= SLOTXY_HAND_LEFT_LAST) {
		rv = INVLOC_HAND_LEFT;
		pi = &myPlayer.InvBody[rv];
	} else if (r >= SLOTXY_HAND_RIGHT_FIRST && r <= SLOTXY_HAND_RIGHT_LAST) {
		pi = &myPlayer.InvBody[INVLOC_HAND_LEFT];
		if (pi->isEmpty() || pi->_iLoc != ILOC_TWOHAND
		    || (myPlayer._pClass == HeroClass::Barbarian && (myPlayer.InvBody[INVLOC_HAND_LEFT]._itype == ITYPE_SWORD || myPlayer.InvBody[INVLOC_HAND_LEFT]._itype == ITYPE_MACE))) {
			rv = INVLOC_HAND_RIGHT;
			pi = &myPlayer.InvBody[rv];
		} else {
			rv = INVLOC_HAND_LEFT;
		}
	} else if (r >= SLOTXY_CHEST_FIRST && r <= SLOTXY_CHEST_LAST) {
		rv = INVLOC_CHEST;
		pi = &myPlayer.InvBody[rv];
	} else if (r >= SLOTXY_INV_FIRST && r <= SLOTXY_INV_LAST) {
		r = abs(myPlayer.InvGrid[r - SLOTXY_INV_FIRST]);
		if (r == 0)
			return -1;
		int ii = r - 1;
		rv = ii + INVITEM_INV_FIRST;
		pi = &myPlayer.InvList[ii];
	} else if (r >= SLOTXY_BELT_FIRST) {
		r -= SLOTXY_BELT_FIRST;
		drawsbarflag = true;
		pi = &myPlayer.SpdList[r];
		if (pi->isEmpty())
			return -1;
		rv = r + INVITEM_BELT_FIRST;
	}

	if (pi->isEmpty())
		return -1;

	if (pi->_itype == ITYPE_GOLD) {
		int nGold = pi->_ivalue;
		strcpy(infostr, fmt::format(ngettext("{:d} gold piece", "{:d} gold pieces", nGold), nGold).c_str());
	} else {
		infoclr = pi->getTextColor();
		if (pi->_iIdentified) {
			strcpy(infostr, pi->_iIName);
			PrintItemDetails(pi);
		} else {
			strcpy(infostr, pi->_iName);
			PrintItemDur(pi);
		}
	}

	return rv;
}

void RemoveScroll(int pnum)
{
	auto &player = plr[pnum];

	for (int i = 0; i < player._pNumInv; i++) {
		if (!player.InvList[i].isEmpty()
		    && (player.InvList[i]._iMiscId == IMISC_SCROLL || player.InvList[i]._iMiscId == IMISC_SCROLLT)
		    && player.InvList[i]._iSpell == player._pRSpell) {
			player.RemoveInvItem(i);
			player.CalcScrolls();
			return;
		}
	}
	for (int i = 0; i < MAXBELTITEMS; i++) {
		if (!player.SpdList[i].isEmpty()
		    && (player.SpdList[i]._iMiscId == IMISC_SCROLL || player.SpdList[i]._iMiscId == IMISC_SCROLLT)
		    && player.SpdList[i]._iSpell == player._pSpell) {
			player.RemoveSpdBarItem(i);
			player.CalcScrolls();
			return;
		}
	}
}

bool UseScroll()
{
	if (pcurs != CURSOR_HAND)
		return false;

	auto &myPlayer = plr[myplr];

	if (leveltype == DTYPE_TOWN && !spelldata[myPlayer._pRSpell].sTownSpell)
		return false;

	for (int i = 0; i < myPlayer._pNumInv; i++) {
		if (!myPlayer.InvList[i].isEmpty()
		    && (myPlayer.InvList[i]._iMiscId == IMISC_SCROLL || myPlayer.InvList[i]._iMiscId == IMISC_SCROLLT)
		    && myPlayer.InvList[i]._iSpell == myPlayer._pRSpell) {
			return true;
		}
	}
	for (auto &item : myPlayer.SpdList) {
		if (!item.isEmpty()
		    && (item._iMiscId == IMISC_SCROLL || item._iMiscId == IMISC_SCROLLT)
		    && item._iSpell == myPlayer._pRSpell) {
			return true;
		}
	}

	return false;
}

static bool CanUseStaff(ItemStruct &staff, spell_id spell)
{
	return !staff.isEmpty()
	    && (staff._iMiscId == IMISC_STAFF || staff._iMiscId == IMISC_UNIQUE)
	    && staff._iSpell == spell
	    && staff._iCharges > 0;
}

void UseStaffCharge(int pnum)
{
	auto &player = plr[pnum];
	auto &staff = player.InvBody[INVLOC_HAND_LEFT];

	if (!CanUseStaff(staff, player._pRSpell))
		return;

	staff._iCharges--;
	CalcPlrStaff(pnum);
}

bool UseStaff()
{
	if (pcurs != CURSOR_HAND) {
		return false;
	}

	auto &myPlayer = plr[myplr];

	return CanUseStaff(myPlayer.InvBody[INVLOC_HAND_LEFT], myPlayer._pRSpell);
}

void StartGoldDrop()
{
	initialDropGoldIndex = pcursinvitem;

	auto &myPlayer = plr[myplr];

	if (pcursinvitem <= INVITEM_INV_LAST)
		initialDropGoldValue = myPlayer.InvList[pcursinvitem - INVITEM_INV_FIRST]._ivalue;
	else
		initialDropGoldValue = myPlayer.SpdList[pcursinvitem - INVITEM_BELT_FIRST]._ivalue;

	dropGoldFlag = true;
	dropGoldValue = 0;

	if (talkflag)
		control_reset_talk();
}

bool UseInvItem(int pnum, int cii)
{
	int c;
	ItemStruct *item;

	auto &player = plr[pnum];

	if (player._pInvincible && player._pHitPoints == 0 && pnum == myplr)
		return true;
	if (pcurs != CURSOR_HAND)
		return true;
	if (stextflag != STORE_NONE)
		return true;
	if (cii < INVITEM_INV_FIRST)
		return false;

	bool speedlist = false;
	if (cii <= INVITEM_INV_LAST) {
		c = cii - INVITEM_INV_FIRST;
		item = &player.InvList[c];
	} else {
		if (talkflag)
			return true;
		c = cii - INVITEM_BELT_FIRST;
		item = &player.SpdList[c];
		speedlist = true;
	}

	switch (item->IDidx) {
	case IDI_MUSHROOM:
		player.Say(HeroSpeech::NowThatsOneBigMushroom, 10);
		return true;
	case IDI_FUNGALTM:
		PlaySFX(IS_IBOOK);
		player.Say(HeroSpeech::ThatDidntDoAnything, 10);
		return true;
	}

	if (!AllItemsList[item->IDidx].iUsable)
		return false;

	if (!item->_iStatFlag) {
		player.Say(HeroSpeech::ICantUseThisYet);
		return true;
	}

	if (item->_iMiscId == IMISC_NONE && item->_itype == ITYPE_GOLD) {
		StartGoldDrop();
		return true;
	}

	if (dropGoldFlag) {
		dropGoldFlag = false;
		dropGoldValue = 0;
	}

	if (item->_iMiscId == IMISC_SCROLL && currlevel == 0 && !spelldata[item->_iSpell].sTownSpell) {
		return true;
	}

	if (item->_iMiscId == IMISC_SCROLLT && currlevel == 0 && !spelldata[item->_iSpell].sTownSpell) {
		return true;
	}

	if (item->_iMiscId > IMISC_RUNEFIRST && item->_iMiscId < IMISC_RUNELAST && currlevel == 0) {
		return true;
	}

	int idata = ItemCAnimTbl[item->_iCurs];
	if (item->_iMiscId == IMISC_BOOK)
		PlaySFX(IS_RBOOK);
	else if (pnum == myplr)
		PlaySFX(ItemInvSnds[idata]);

	UseItem(pnum, item->_iMiscId, item->_iSpell);

	if (speedlist) {
		if (player.SpdList[c]._iMiscId == IMISC_NOTE) {
			InitQTextMsg(TEXT_BOOK9);
			invflag = false;
			return true;
		}
		player.RemoveSpdBarItem(c);
		return true;
	}
	if (player.InvList[c]._iMiscId == IMISC_MAPOFDOOM)
		return true;
	if (player.InvList[c]._iMiscId == IMISC_NOTE) {
		InitQTextMsg(TEXT_BOOK9);
		invflag = false;
		return true;
	}
	player.RemoveInvItem(c);

	return true;
}

void DoTelekinesis()
{
	if (pcursobj != -1)
		NetSendCmdParam1(true, CMD_OPOBJT, pcursobj);
	if (pcursitem != -1)
		NetSendCmdGItem(true, CMD_REQUESTAGITEM, myplr, myplr, pcursitem);
	if (pcursmonst != -1 && !M_Talker(pcursmonst) && monster[pcursmonst].mtalkmsg == TEXT_NONE)
		NetSendCmdParam1(true, CMD_KNOCKBACK, pcursmonst);
	NewCursor(CURSOR_HAND);
}

int CalculateGold(PlayerStruct &player)
{
	int gold = 0;

	for (int i = 0; i < player._pNumInv; i++) {
		if (player.InvList[i]._itype == ITYPE_GOLD)
			gold += player.InvList[i]._ivalue;
	}

	return gold;
}

bool DropItemBeforeTrig()
{
	if (!TryInvPut()) {
		return false;
	}

	NetSendCmdPItem(true, CMD_PUTITEM, { cursmx, cursmy });
	NewCursor(CURSOR_HAND);
	return true;
}

} // namespace devilution