/**

  * vim: set ts=4 :

  * ================================================================

  * SourceMod

  * Copyright (C) 2004-2007 AlliedModders LLC.  All rights reserved.

  * ================================================================

  *

  * This program is free software; you can redistribute it and/or 

  * modify it under the terms of the GNU General Public License, 

  * version 3.0, as published by the Free Software Foundation.

  * 

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program.  If not, see <http://www.gnu.org/licenses/>.

  *

  * As a special exception, AlliedModders LLC gives you permission to 

  * link the code of this program (as well as its derivative works) to 

  * "Half-Life 2," the "Source Engine," the "SourcePawn JIT," and any 

  * Game MODs that run on software by the Valve Corporation.  You must 

  * obey the GNU General Public License in all respects for all other 

  * code used. Additionally, AlliedModders LLC grants this exception 

  * to all derivative works. AlliedModders LLC defines further 

  * exceptions, found in LICENSE.txt (as of this writing, version 

  * JULY-31-2007), or <http://www.sourcemod.net/license.php>.

  *

  * Version: $Id$

  */

 #include "sm_globals.h"

 #include <sh_stack.h>

 #include "DebugReporter.h"

 #include "MenuManager.h"

 #include "MenuStyle_Valve.h"

 #include "MenuStyle_Radio.h"

 #include "HandleSys.h"

 #include "PluginSys.h"

 #include "sm_stringutil.h"

 #if defined MENU_DEBUG

 #include "Logger.h"

 #endif

 #if defined CreateMenu

 #undef CreateMenu

 #endif

 /**

  * And God said, "let there be menus," and behold, there were menus.  

  * God saw the menus and they were good.  And the evening and the morning

  * were the third day.

  */

 enum MenuAction

 {

 	MenuAction_Start = (1<<0),		/**< A menu has been started (nothing passed) */

 	MenuAction_Display = (1<<1),	/**< A menu is about to be displayed (param1=client, param2=MenuPanel Handle) */

 	MenuAction_Select = (1<<2),		/**< An item was selected (param1=client, param2=item) */

 	MenuAction_Cancel = (1<<3),		/**< The menu was cancelled (param1=client, param2=item) */

 	MenuAction_End = (1<<4),		/**< A menu's display/selection cycle is complete (nothing passed). */

 	MenuAction_VoteEnd = (1<<5),	/**< (VOTE ONLY): A vote sequence has ended (param1=chosen item) */

 	MenuAction_VoteStart = (1<<6), 	/**< (VOTE ONLY): A vote sequence has started */

 	MenuAction_VoteCancel = (1<<7),	/**< (VOTE ONLY): A vote sequence has been cancelled (nothing passed) */

 	MenuAction_DrawItem = (1<<8),	/**< A style is being drawn; return the new style (param1=client, param2=item) */

 	MenuAction_DisplayItem = (1<<9),	/**< the odd duck */

 };

 class CPanelHandler : public IMenuHandler

 {

 	friend class MenuNativeHelpers;

 public:

 	CPanelHandler()

 	{

 	}

 	void OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason);

 	void OnMenuSelect(IBaseMenu *menu, int client, unsigned int item);

 private:

 	IPluginFunction *m_pFunc;

 	IPlugin *m_pPlugin;

 };

 class CMenuHandler : public IMenuHandler

 {

 	friend class MenuNativeHelpers;

 public:

 	CMenuHandler(IPluginFunction *pBasic, int flags);

 public:

 	void OnMenuStart(IBaseMenu *menu);

 	void OnMenuDisplay(IBaseMenu *menu, int client, IMenuPanel *display);

 	void OnMenuSelect(IBaseMenu *menu, int client, unsigned int item);

 	void OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason);

 	void OnMenuEnd(IBaseMenu *menu, MenuEndReason reason);

 	void OnMenuDestroy(IBaseMenu *menu);

 	void OnMenuVoteStart(IBaseMenu *menu);

 	void OnMenuVoteResults(IBaseMenu *menu, const menu_vote_result_t *results);

 	void OnMenuVoteCancel(IBaseMenu *menu);

 	void OnMenuDrawItem(IBaseMenu *menu, int client, unsigned int item, unsigned int &style);

 	unsigned int OnMenuDisplayItem(IBaseMenu *menu, int client, IMenuPanel *panel, unsigned int item, const ItemDrawInfo &dr);

 	bool OnSetHandlerOption(const char *option, const void *data);

 #if 0

 	void OnMenuDrawItem(IBaseMenu *menu, int client, unsigned int item, unsigned int &style);

 	void OnMenuDisplayItem(IBaseMenu *menu, int client, unsigned int item, const char **display);

 #endif

 private:

 	cell_t DoAction(IBaseMenu *menu, MenuAction action, cell_t param1, cell_t param2, cell_t def_res=0);

 private:

 	IPluginFunction *m_pBasic;

 	int m_Flags;

 	IPluginFunction *m_pVoteResults;

 	cell_t m_fnVoteResult;

 };

 /**

  * GLOBAL CLASS FOR HELPERS

  */

 class MenuNativeHelpers : 

 	public SMGlobalClass,

 	public IHandleTypeDispatch,

 	public IPluginsListener

 {

 public:

 	virtual void OnSourceModAllInitialized()

 	{

 		m_PanelType = g_HandleSys.CreateType("IMenuPanel", this, 0, NULL, NULL, g_pCoreIdent, NULL);

 		m_TempPanelType = g_HandleSys.CreateType("TempIMenuPanel", this, m_PanelType, NULL, NULL, g_pCoreIdent, NULL);

 		g_PluginSys.AddPluginsListener(this);

 	}

 	virtual void OnSourceModShutdown()

 	{

 		g_HandleSys.RemoveType(m_TempPanelType, g_pCoreIdent);

 		g_HandleSys.RemoveType(m_PanelType, g_pCoreIdent);

 		while (!m_FreePanelHandlers.empty())

 		{

 			delete m_FreePanelHandlers.front();

 			m_FreePanelHandlers.pop();

 		}

 		while (!m_FreeMenuHandlers.empty())

 		{

 			delete m_FreeMenuHandlers.front();

 			m_FreeMenuHandlers.pop();

 		}

 	}

 	virtual void OnHandleDestroy(HandleType_t type, void *object)

 	{

 		if (type == m_TempPanelType)

 		{

 			return;

 		}

 		IMenuPanel *panel = (IMenuPanel *)object;

 		panel->DeleteThis();

 	}

 	/**

 	 * It is extremely important that unloaded plugins don't crash.

 	 * Thus, if a plugin unloads, we run through every handler we have.

 	 * This means we do almost no runtime work for keeping track of

 	 * our panel handlers (we don't have to store a list of the running 

 	 * ones), but when push comes to shove, we have to scan them all

 	 * in case any of them are active.

 	 */

 	virtual void OnPluginUnloaded(IPlugin *plugin)

 	{

 		for (size_t i = 0; i < m_PanelHandlers.size(); i++)

 		{

 			if (m_PanelHandlers[i]->m_pPlugin == plugin)

 			{

 				m_PanelHandlers[i]->m_pPlugin = NULL;

 				m_PanelHandlers[i]->m_pFunc = NULL;

 			}

 		}

 	}

 	inline HandleType_t GetPanelType()

 	{

 		return m_PanelType;

 	}

 	inline HandleType_t GetTempPanelType()

 	{

 		return m_TempPanelType;

 	}

 	CPanelHandler *GetPanelHandler(IPluginFunction *pFunction)

 	{

 		CPanelHandler *handler;

 		if (m_FreePanelHandlers.empty())

 		{

 			handler = new CPanelHandler;

 			m_PanelHandlers.push_back(handler);

 		} else {

 			handler = m_FreePanelHandlers.front();

 			m_FreePanelHandlers.pop();

 		}

 		handler->m_pFunc = pFunction;

 		handler->m_pPlugin = g_PluginSys.GetPluginByCtx(pFunction->GetParentContext()->GetContext());

 		return handler;

 	}

 	void FreePanelHandler(CPanelHandler *handler)

 	{

 		handler->m_pFunc = NULL;

 		handler->m_pPlugin = NULL;

 		m_FreePanelHandlers.push(handler);

 	}

 	CMenuHandler *GetMenuHandler(IPluginFunction *pFunction, int flags)

 	{

 		CMenuHandler *handler;

 		if (m_FreeMenuHandlers.empty())

 		{

 			handler = new CMenuHandler(pFunction, flags);

 		} else {

 			handler = m_FreeMenuHandlers.front();

 			m_FreeMenuHandlers.pop();

 			handler->m_pBasic = pFunction;

 			handler->m_Flags = flags;

 			handler->m_pVoteResults = NULL;

 		}

 		return handler;

 	}

 	void FreeMenuHandler(CMenuHandler *handler)

 	{

 		m_FreeMenuHandlers.push(handler);

 	}

 private:

 	HandleType_t m_PanelType;

 	HandleType_t m_TempPanelType;

 	CStack<CPanelHandler *> m_FreePanelHandlers;

 	CStack<CMenuHandler *> m_FreeMenuHandlers;

 	CVector<CPanelHandler *> m_PanelHandlers;

 } g_MenuHelpers;

 /**

  * BASIC PANEL HANDLER WRAPPER

  */

 void CPanelHandler::OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason)

 {

 	if (m_pFunc)

 	{

 		m_pFunc->PushCell(BAD_HANDLE);

 		m_pFunc->PushCell(MenuAction_Cancel);

 		m_pFunc->PushCell(client);

 		m_pFunc->PushCell(reason);

 		m_pFunc->Execute(NULL);

 	}

 	g_MenuHelpers.FreePanelHandler(this);

 }

 void CPanelHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int item)

 {

 	if (m_pFunc)

 	{

 		m_pFunc->PushCell(BAD_HANDLE);

 		m_pFunc->PushCell(MenuAction_Select);

 		m_pFunc->PushCell(client);

 		m_pFunc->PushCell(item);

 		m_pFunc->Execute(NULL);

 	}

 	g_MenuHelpers.FreePanelHandler(this);

 }

 static IMenuPanel *s_pCurPanel = NULL;

 static unsigned int s_CurPanelReturn = 0;

 static const ItemDrawInfo *s_CurDrawInfo = NULL;

 /**

  * MENU HANDLER WRAPPER

  */

 CMenuHandler::CMenuHandler(IPluginFunction *pBasic, int flags) : 

 	m_pBasic(pBasic), m_Flags(flags), m_pVoteResults(NULL)

 {

 	/* :TODO: We can probably cache the handle ahead of time */

 }

 void CMenuHandler::OnMenuStart(IBaseMenu *menu)

 {

 	if ((m_Flags & (int)MenuAction_Start) == (int)MenuAction_Start)

 	{

 		DoAction(menu, MenuAction_Start, 0, 0);

 	}

 }

 void CMenuHandler::OnMenuDisplay(IBaseMenu *menu, int client, IMenuPanel *panel)

 {

 	if ((m_Flags & (int)MenuAction_Display) == (int)MenuAction_Display)

 	{

 		HandleSecurity sec;

 		sec.pIdentity = g_pCoreIdent;

 		sec.pOwner = m_pBasic->GetParentContext()->GetIdentity();

 		HandleAccess access;

 		g_HandleSys.InitAccessDefaults(NULL, &access);

 		access.access[HandleAccess_Delete] = HANDLE_RESTRICT_IDENTITY|HANDLE_RESTRICT_OWNER;

 		Handle_t hndl = g_HandleSys.CreateHandleEx(g_MenuHelpers.GetTempPanelType(), panel, &sec, &access, NULL);

 		DoAction(menu, MenuAction_Display, client, hndl);

 		g_HandleSys.FreeHandle(hndl, &sec);

 	}

 }

 void CMenuHandler::OnMenuSelect(IBaseMenu *menu, int client, unsigned int item)

 {

 	DoAction(menu, MenuAction_Select, client, item);

 }

 void CMenuHandler::OnMenuCancel(IBaseMenu *menu, int client, MenuCancelReason reason)

 {

 	DoAction(menu, MenuAction_Cancel, client, (cell_t)reason);

 }

 void CMenuHandler::OnMenuEnd(IBaseMenu *menu, MenuEndReason reason)

 {

 	DoAction(menu, MenuAction_End, reason, 0);

 }

 void CMenuHandler::OnMenuDestroy(IBaseMenu *menu)

 {

 	g_MenuHelpers.FreeMenuHandler(this);

 }

 void CMenuHandler::OnMenuVoteStart(IBaseMenu *menu)

 {

 	DoAction(menu, MenuAction_VoteStart, 0, 0);

 }

 void CMenuHandler::OnMenuVoteCancel(IBaseMenu *menu)

 {

 	DoAction(menu, MenuAction_VoteCancel, 0, 0);

 }

 void CMenuHandler::OnMenuDrawItem(IBaseMenu *menu, int client, unsigned int item, unsigned int &style)

 {

 	if ((m_Flags & (int)MenuAction_DrawItem) == (int)MenuAction_DrawItem)

 	{

 		cell_t result = DoAction(menu, MenuAction_DrawItem, client, item, style);

 		style = (unsigned int)result;

 	}

 }

 unsigned int CMenuHandler::OnMenuDisplayItem(IBaseMenu *menu,

 									 int client,

 									 IMenuPanel *panel,

 									 unsigned int item,

 									 const ItemDrawInfo &dr)

 {

 	if ((m_Flags & (int)MenuAction_DisplayItem) == (int)MenuAction_DisplayItem)

 	{

 		IMenuPanel *oldpanel = s_pCurPanel;

 		unsigned int oldret = s_CurPanelReturn;

 		const ItemDrawInfo *oldinfo = s_CurDrawInfo;

 		s_pCurPanel = panel;

 		s_CurPanelReturn = 0;

 		s_CurDrawInfo = &dr;

 		cell_t res = DoAction(menu, MenuAction_DisplayItem, client, item, 0);

 		if (!res)

 		{

 			res = s_CurPanelReturn;

 		}

 		s_pCurPanel = oldpanel;

 		s_CurPanelReturn = oldret;

 		s_CurDrawInfo = oldinfo;

 		return res;

 	}

 	return 0;

 }

 cell_t CMenuHandler::DoAction(IBaseMenu *menu, MenuAction action, cell_t param1, cell_t param2, cell_t def_res)

 {

 #if defined MENU_DEBUG

 	g_Logger.LogMessage("[SM_MENU] CMenuHandler::DoAction() (menu %p/%08x) (action %d) (param1 %d) (param2 %d)",

 		menu,

 		menu->GetHandle(),

 		action,

 		param1,

 		param2);

 #endif

 	cell_t res = def_res;

 	m_pBasic->PushCell(menu->GetHandle());

 	m_pBasic->PushCell((cell_t)action);

 	m_pBasic->PushCell(param1);

 	m_pBasic->PushCell(param2);

 	m_pBasic->Execute(&res);

 	return res;

 }

 void CMenuHandler::OnMenuVoteResults(IBaseMenu *menu, const menu_vote_result_t *results)

 {

 	if (!m_pVoteResults)

 	{

 		/* Call MenuAction_VoteEnd instead.  See if there are any extra winners. */

 		unsigned int num_items = 1;

 		for (unsigned int i=1; i<results->num_items; i++)

 		{

 			if (results->item_list[i].count != results->item_list[0].count)

 			{

 				break;

 			}

 			num_items++;

 		}

 		/* See if we need to pick a random winner. */

 		unsigned int winning_item;

 		if (num_items > 1)

 		{

 			/* Yes, we do. */

 			srand(time(NULL));

 			winning_item = rand() % num_items;

 			winning_item = results->item_list[winning_item].item;

 		} else {

 			/* No, take the first. */

 			winning_item = results->item_list[0].item;

 		}

 		unsigned int total_votes = results->num_votes;

 		unsigned int winning_votes = results->item_list[0].count;

 		DoAction(menu, MenuAction_VoteEnd, winning_item, (total_votes << 16) | (winning_votes & 0xFFFF));

 	} else {

 		IPluginContext *pContext = m_pVoteResults->GetParentContext();

 		bool no_call = false;

 		int err;

 		/* First array */

 		cell_t client_array_address = -1;

 		cell_t *client_array_base = NULL;

 		cell_t client_array_size = results->num_clients + (results->num_clients * 2);

 		if (client_array_size)

 		{

 			if ((err = pContext->HeapAlloc(client_array_size, &client_array_address, &client_array_base))

 				!= SP_ERROR_NONE)

 			{

 				g_DbgReporter.GenerateError(pContext, m_fnVoteResult, err, "Menu callback could not allocate %d bytes for client list.", client_array_size * sizeof(cell_t));

 				no_call = true;

 			} else {

 				cell_t target_offs = sizeof(cell_t) * results->num_clients;

 				cell_t *cur_index = client_array_base;

 				cell_t *cur_array;

 				for (unsigned int i=0; i<results->num_clients; i++)

 				{

 					/* Copy the array index */

 					*cur_index = target_offs;

 					/* Get the current array address */

 					cur_array = (cell_t *)((char *)cur_index + target_offs);

 					/* Store information */

 					cur_array[0] = results->client_list[i].client;

 					cur_array[1] = results->client_list[i].item;

 					/* Adjust for the new target by subtracting one indirection

 					 * and adding one array.

 					 */

 					target_offs += (sizeof(cell_t) * 2) - sizeof(cell_t);

 					cur_index++;

 				}

 			}

 		}

 		/* Second array */

 		cell_t item_array_address = -1;

 		cell_t *item_array_base = NULL;

 		cell_t item_array_size = results->num_items + (results->num_items * 2);

 		if (item_array_size)

 		{

 			if ((err = pContext->HeapAlloc(item_array_size, &item_array_address, &item_array_base))

 				!= SP_ERROR_NONE)

 			{

 				g_DbgReporter.GenerateError(pContext, m_fnVoteResult, err, "Menu callback could not allocate %d bytes for item list.", item_array_size);

 				no_call = true;

 			} else {

 				cell_t target_offs = sizeof(cell_t) * results->num_items;

 				cell_t *cur_index = item_array_base;

 				cell_t *cur_array;

 				for (unsigned int i=0; i<results->num_items; i++)

 				{

 					/* Copy the array index */

 					*cur_index = target_offs;

 					/* Get the current array address */

 					cur_array = (cell_t *)((char *)cur_index + target_offs);

 					/* Store information */

 					cur_array[0] = results->item_list[i].item;

 					cur_array[1] = results->item_list[i].count;

 					/* Adjust for the new target by subtracting one indirection

 					 * and adding one array.

 					 */

 					target_offs += (sizeof(cell_t) * 2) - sizeof(cell_t);

 					cur_index++;

 				}

 			}

 		}

 		/* Finally, push everything */

 		if (!no_call)

 		{

 			m_pVoteResults->PushCell(menu->GetHandle());

 			m_pVoteResults->PushCell(results->num_votes);

 			m_pVoteResults->PushCell(results->num_clients);

 			m_pVoteResults->PushCell(client_array_address);

 			m_pVoteResults->PushCell(results->num_items);

 			m_pVoteResults->PushCell(item_array_address);

 			m_pVoteResults->Execute(NULL);

 		}

 		/* Free what we allocated, in reverse order as required */

 		if (item_array_address != -1)

 		{

 			pContext->HeapPop(item_array_address);

 		}

 		if (client_array_address != -1)

 		{

 			pContext->HeapPop(client_array_address);

 		}

 	}

 }

 bool CMenuHandler::OnSetHandlerOption(const char *option, const void *data)

 {

 	if (strcmp(option, "set_vote_results_handler") == 0)

 	{

 		void **array = (void **)data;

 		m_pVoteResults = (IPluginFunction *)array[0];

 		m_fnVoteResult = *(cell_t *)((cell_t *)array[1]);

 		return true;

 	}

 	return false;

 }

 /**

  * INLINE FUNCTIONS FOR NATIVES

  */

 inline Handle_t MakePanelHandle(IMenuPanel *panel, IPluginContext *pContext)

 {

 	return g_HandleSys.CreateHandle(g_MenuHelpers.GetPanelType(), panel, pContext->GetIdentity(), g_pCoreIdent, NULL);

 }

 inline HandleError ReadPanelHandle(Handle_t hndl, IMenuPanel **panel)

 {

 	HandleSecurity sec;

 	sec.pIdentity = g_pCoreIdent;

 	sec.pOwner = NULL;

 	return g_HandleSys.ReadHandle(hndl, g_MenuHelpers.GetPanelType(), &sec, (void **)panel);

 }

 inline IMenuStyle *GetStyleFromCell(cell_t cell)

 {

 	enum MenuStyle

 	{

 		MenuStyle_Default = 0,		/**< The "default" menu style for the mod */

 		MenuStyle_Valve = 1,		/**< The Valve provided menu style (Used on HL2DM) */

 		MenuStyle_Radio = 2,		/**< The simpler menu style commonly used on CS:S */

 	};

 	if (cell == MenuStyle_Valve)

 	{

 		return &g_ValveMenuStyle;

 	} else if (cell == MenuStyle_Radio

 			   && g_RadioMenuStyle.IsSupported())

 	{

 		return &g_RadioMenuStyle;

 	}

 	return g_Menus.GetDefaultStyle();

 }

 /***********************************

  **** NATIVE DEFINITIONS ***********

  ***********************************/

 static cell_t CreateMenu(IPluginContext *pContext, const cell_t *params)

 {

 	IMenuStyle *style = g_Menus.GetDefaultStyle();

 	IPluginFunction *pFunction;

 	if ((pFunction=pContext->GetFunctionById(params[1])) == NULL)

 	{

 		return pContext->ThrowNativeError("Function id %x is invalid", params[1]);

 	}

 	CMenuHandler *handler = g_MenuHelpers.GetMenuHandler(pFunction, params[2]);

 	IBaseMenu *menu = style->CreateMenu(handler, pContext->GetIdentity());

 	Handle_t hndl = menu->GetHandle();

 	if (!hndl)

 	{

 		menu->Destroy();

 		return BAD_HANDLE;

 	}

 	return hndl;

 }

 static cell_t DisplayMenu(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return menu->Display(params[2], params[3]) ? 1 : 0;

 }

 static cell_t VoteMenu(IPluginContext *pContext, const cell_t *params)

 {

 	if (g_Menus.IsVoteInProgress())

 	{

 		return pContext->ThrowNativeError("A vote is already in progress");

 	}

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	cell_t *addr;

 	pContext->LocalToPhysAddr(params[2], &addr);

 	if (!g_Menus.StartVote(menu, params[3], addr, params[4]))

 	{

 		return 0;

 	}

 	return 1;

 }

 static cell_t AddMenuItem(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	char *info;

 	ItemDrawInfo dr;

 	pContext->LocalToString(params[2], &info);

 	pContext->LocalToString(params[3], (char **)&dr.display);

 	dr.style = params[4];

 	return menu->AppendItem(info, dr) ? 1 : 0;

 }

 static cell_t InsertMenuItem(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	char *info;

 	ItemDrawInfo dr;

 	pContext->LocalToString(params[3], &info);

 	pContext->LocalToString(params[4], (char **)&dr.display);

 	dr.style = params[5];

 	return menu->InsertItem(params[2], info, dr) ? 1 : 0;

 }

 static cell_t RemoveMenuItem(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return menu->RemoveItem(params[2]) ? 1 : 0;

 }

 static cell_t RemoveAllMenuItems(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	menu->RemoveAllItems();

 	return 1;

 }

 static cell_t GetMenuItem(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	ItemDrawInfo dr;

 	const char *info;

 	if ((info=menu->GetItemInfo(params[2], &dr)) == NULL)

 	{

 		return 0;

 	}

 	pContext->StringToLocalUTF8(params[3], params[4], info, NULL);

 	pContext->StringToLocalUTF8(params[6], params[7], dr.display ? dr.display : "", NULL);

 	cell_t *addr;

 	pContext->LocalToPhysAddr(params[5], &addr);

 	*addr = dr.style;

 	return 1;

 }

 static cell_t SetMenuPagination(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return menu->SetPagination(params[2]) ? 1 : 0;

 }

 static cell_t GetMenuPagination(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return menu->GetPagination();

 }

 static cell_t GetMenuItemCount(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return menu->GetItemCount();

 }

 static cell_t SetMenuTitle(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	g_SourceMod.SetGlobalTarget(LANG_SERVER);

 	char buffer[1024];

 	g_SourceMod.FormatString(buffer, sizeof(buffer), pContext, params, 2);

 	menu->SetDefaultTitle(buffer);

 	return 1;

 }

 static cell_t CreatePanelFromMenu(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	IMenuPanel *panel = menu->CreatePanel();

 	hndl = MakePanelHandle(panel, pContext);

 	if (!hndl)

 	{

 		panel->DeleteThis();

 	}

 	return hndl;

 }

 static cell_t GetMenuExitButton(IPluginContext *pContext, const cell_t *params)

 {

 	Handle_t hndl = (Handle_t)params[1];

 	HandleError err;

 	IBaseMenu *menu;

 	if ((err=g_Menus.ReadMenuHandle(params[1], &menu)) != HandleError_None)

 	{

 		return pContext->ThrowNativeError("Menu handle %x is invalid (error %d)", hndl, err);

 	}

 	return ((menu->GetMenuOptionFlags() & MENUFLAG_BUTTON_EXIT) == MENUFLAG_BUTTON_EXIT) ? 1 : 0;