From fb4c3fc4d9325c28b8640f0e717e5e320334a7c6 Mon Sep 17 00:00:00 2001 From: Mattes D Date: Fri, 10 Jun 2016 21:30:07 +0200 Subject: Changed cLuaWindow callbacks to use cLuaState::cCallback. --- src/Bindings/LuaWindow.h | 72 +++++++++++++++++++++++------------------------- 1 file changed, 35 insertions(+), 37 deletions(-) (limited to 'src/Bindings/LuaWindow.h') diff --git a/src/Bindings/LuaWindow.h b/src/Bindings/LuaWindow.h index f292a5154..2a16d91ed 100644 --- a/src/Bindings/LuaWindow.h +++ b/src/Bindings/LuaWindow.h @@ -9,6 +9,8 @@ #pragma once +#include +#include "LuaState.h" #include "../UI/Window.h" #include "../ItemGrid.h" @@ -16,35 +18,30 @@ -// fwd: PluginLua.h -class cPluginLua; - - - - - /** A window that has been created by a Lua plugin and is handled entirely by that plugin This object needs extra care with its lifetime management: - It is created by Lua, so Lua expects to garbage-collect it later -- normal cWindow objects are deleted in their ClosedByPlayer() function if the last player closes them -To overcome this, this object overloads the Destroy functions, which doesn't let the ClosedByPlayer() -delete the window, but rather leaves it dangling, with only Lua having the reference to it. -Additionally, to forbid Lua from deleting this object while it is used by players, the manual bindings for -cPlayer:OpenWindow check if the window is of this class, and if so, make a global Lua reference for this object. -This reference needs to be unreferenced in the Destroy() function. */ +- Normal cWindow objects are deleted in their ClosedByPlayer() function if the last player closes them + To overcome this, this object overloads the Destroy functions, which doesn't let the ClosedByPlayer() + delete the window, but rather leaves it dangling, with only Lua having the reference to it. +- Lua could GC the window while a player is still using it + The object creates a Lua reference to itself when opened by a player and + removes the reference when the last player closes the window. +*/ // tolua_begin class cLuaWindow : public cWindow // tolua_end , public cItemGrid::cListener - // tolua_begin -{ - typedef cWindow super; +{ // tolua_export + typedef cWindow Super; public: - /** Create a window of the specified type, with a slot grid of a_SlotsX * a_SlotsY size */ - cLuaWindow(cWindow::WindowType a_WindowType, int a_SlotsX, int a_SlotsY, const AString & a_Title); + /** Create a window of the specified type, with a slot grid of a_SlotsX * a_SlotsY size. + Exported in ManualBindings.cpp */ + cLuaWindow(cLuaState & a_LuaState, cWindow::WindowType a_WindowType, int a_SlotsX, int a_SlotsY, const AString & a_Title); + // tolua_begin virtual ~cLuaWindow(); /** Returns the internal representation of the contents that are manipulated by Lua */ @@ -52,36 +49,37 @@ public: // tolua_end - /** Sets the plugin reference and the internal Lua object reference index - used for preventing Lua's GC to collect this class while the window is open. */ - void SetLuaRef(cPluginLua * a_Plugin, int a_LuaRef); - - /** Returns true if SetLuaRef() has been called */ - bool IsLuaReferenced(void) const; - - /** Sets the callback function (Lua reference) to call when the window is about to close */ - void SetOnClosing(cPluginLua * a_Plugin, int a_FnRef); + /** Sets the Lua callback function to call when the window is about to close */ + void SetOnClosing(cLuaState::cCallbackPtr a_OnClosing); - /** Sets the callback function (Lua reference) to call when a slot is changed */ - void SetOnSlotChanged(cPluginLua * a_Plugin, int a_FnRef); + /** Sets the Lua callback function to call when a slot is changed */ + void SetOnSlotChanged(cLuaState::cCallbackPtr a_OnSlotChanged); protected: + /** Contents of the non-inventory part */ cItemGrid m_Contents; - /** The plugin that has opened the window and owns the m_LuaRef */ - cPluginLua * m_Plugin; + /** The Lua state that has opened the window and owns the m_LuaRef */ + cLuaState * m_LuaState; + + /** The Lua callback to call when the window is closing for any player */ + cLuaState::cCallbackPtr m_OnClosing; + + /** The Lua callback to call when a slot has changed */ + cLuaState::cCallbackPtr m_OnSlotChanged; - /** The Lua object reference, used for keeping the object alive as long as any player has the window open */ - int m_LuaRef; + /** Number of players that are currently using the window. + Used to manager the m_LuaRef lifetime. */ + std::atomic m_PlayerCount; - /** The Lua reference for the callback to call when the window is closing for any player */ - int m_OnClosingFnRef; + /** Reference to self, to keep Lua from GCing the object while a player is still using it. + Created when the first player opens the window, destroyed when the last player closes the window. */ + cLuaState::cRef m_LuaRef; - /** The Lua reference for the callback to call when a slot has changed */ - int m_OnSlotChangedFnRef; // cWindow overrides: + virtual void OpenedByPlayer(cPlayer & a_Player) override; virtual bool ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse) override; virtual void Destroy(void) override; virtual void DistributeStack(cItem & a_ItemStack, int a_Slot, cPlayer & a_Player, cSlotArea * a_ClickedArea, bool a_ShouldApply) override; -- cgit v1.2.3