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-rw-r--r--src/Bindings/LuaWindow.cpp95
1 files changed, 39 insertions, 56 deletions
diff --git a/src/Bindings/LuaWindow.cpp b/src/Bindings/LuaWindow.cpp
index 706397a27..bf3f7cfde 100644
--- a/src/Bindings/LuaWindow.cpp
+++ b/src/Bindings/LuaWindow.cpp
@@ -15,14 +15,13 @@
////////////////////////////////////////////////////////////////////////////////
// cLuaWindow:
-cLuaWindow::cLuaWindow(cWindow::WindowType a_WindowType, int a_SlotsX, int a_SlotsY, const AString & a_Title) :
- super(a_WindowType, a_Title),
+cLuaWindow::cLuaWindow(cLuaState & a_LuaState, cWindow::WindowType a_WindowType, int a_SlotsX, int a_SlotsY, const AString & a_Title) :
+ Super(a_WindowType, a_Title),
m_Contents(a_SlotsX, a_SlotsY),
- m_Plugin(nullptr),
- m_LuaRef(LUA_REFNIL),
- m_OnClosingFnRef(LUA_REFNIL),
- m_OnSlotChangedFnRef(LUA_REFNIL)
+ m_LuaState(a_LuaState.QueryCanonLuaState())
{
+ ASSERT(m_LuaState != nullptr); // We must have a valid Lua state; this assert fails only if there was no Canon Lua state
+
m_Contents.AddListener(*this);
m_SlotAreas.push_back(new cSlotAreaItemGrid(m_Contents, *this));
@@ -67,62 +66,42 @@ cLuaWindow::~cLuaWindow()
-void cLuaWindow::SetLuaRef(cPluginLua * a_Plugin, int a_LuaRef)
+void cLuaWindow::SetOnClosing(cLuaState::cCallbackPtr a_OnClosing)
{
- // Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
- ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
- ASSERT(m_LuaRef == LUA_REFNIL);
- m_Plugin = a_Plugin;
- m_LuaRef = a_LuaRef;
-}
-
-
-
+ // Only one Lua state can be a cLuaWindow object callback:
+ ASSERT(a_OnClosing->IsSameLuaState(*m_LuaState));
-
-bool cLuaWindow::IsLuaReferenced(void) const
-{
- return ((m_Plugin != nullptr) && (m_LuaRef != LUA_REFNIL));
+ // Store the new reference, releasing the old one if appropriate:
+ m_OnClosing = a_OnClosing;
}
-void cLuaWindow::SetOnClosing(cPluginLua * a_Plugin, int a_FnRef)
+void cLuaWindow::SetOnSlotChanged(cLuaState::cCallbackPtr a_OnSlotChanged)
{
- // Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
- ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
+ // Only one Lua state can be a cLuaWindow object callback:
+ ASSERT(a_OnSlotChanged->IsSameLuaState(*m_LuaState));
- // If there already was a function, unreference it first
- if (m_OnClosingFnRef != LUA_REFNIL)
- {
- m_Plugin->Unreference(m_OnClosingFnRef);
- }
-
- // Store the new reference
- m_Plugin = a_Plugin;
- m_OnClosingFnRef = a_FnRef;
+ // Store the new reference, releasing the old one if appropriate:
+ m_OnSlotChanged = a_OnSlotChanged;
}
-void cLuaWindow::SetOnSlotChanged(cPluginLua * a_Plugin, int a_FnRef)
+void cLuaWindow::OpenedByPlayer(cPlayer & a_Player)
{
- // Either m_Plugin is not set or equal to the passed plugin; only one plugin can use one cLuaWindow object
- ASSERT((m_Plugin == nullptr) || (m_Plugin == a_Plugin));
-
- // If there already was a function, unreference it first
- if (m_OnSlotChangedFnRef != LUA_REFNIL)
+ // If the first player is opening the window, create a Lua Reference to the window object so that Lua will not GC it until the last player closes the window:
+ if (m_PlayerCount == 0)
{
- m_Plugin->Unreference(m_OnSlotChangedFnRef);
+ m_LuaRef.CreateFromObject(*m_LuaState, this);
}
- // Store the new reference
- m_Plugin = a_Plugin;
- m_OnSlotChangedFnRef = a_FnRef;
+ ++m_PlayerCount;
+ Super::OpenedByPlayer(a_Player);
}
@@ -132,17 +111,27 @@ void cLuaWindow::SetOnSlotChanged(cPluginLua * a_Plugin, int a_FnRef)
bool cLuaWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
{
// First notify the plugin through the registered callback:
- if (m_OnClosingFnRef != LUA_REFNIL)
+ if (m_OnClosing != nullptr)
{
- ASSERT(m_Plugin != nullptr);
- if (m_Plugin->CallbackWindowClosing(m_OnClosingFnRef, *this, a_Player, a_CanRefuse))
+ bool res;
+ if (
+ m_OnClosing->Call(this, &a_Player, a_CanRefuse, cLuaState::Return, res) && // The callback succeeded
+ res // The callback says not to close the window
+ )
{
// The callback disagrees (the higher levels check the CanRefuse flag compliance)
return false;
}
}
- return super::ClosedByPlayer(a_Player, a_CanRefuse);
+ // If the last player has closed the window, release the Lua reference, so that Lua may GC the object:
+ --m_PlayerCount;
+ if (m_PlayerCount == 0)
+ {
+ m_LuaRef.UnRef();
+ }
+
+ return Super::ClosedByPlayer(a_Player, a_CanRefuse);
}
@@ -151,13 +140,7 @@ bool cLuaWindow::ClosedByPlayer(cPlayer & a_Player, bool a_CanRefuse)
void cLuaWindow::Destroy(void)
{
- super::Destroy();
-
- if ((m_LuaRef != LUA_REFNIL) && (m_Plugin != nullptr))
- {
- // The object is referenced by Lua, un-reference it
- m_Plugin->Unreference(m_LuaRef);
- }
+ Super::Destroy();
// Lua will take care of this object, it will garbage-collect it, so we must not delete it!
m_IsDestroyed = false;
@@ -178,7 +161,7 @@ void cLuaWindow::DistributeStack(cItem & a_ItemStack, int a_Slot, cPlayer & a_Pl
}
}
- super::DistributeStackToAreas(a_ItemStack, a_Player, Areas, a_ShouldApply, false);
+ Super::DistributeStackToAreas(a_ItemStack, a_Player, Areas, a_ShouldApply, false);
}
@@ -194,9 +177,9 @@ void cLuaWindow::OnSlotChanged(cItemGrid * a_ItemGrid, int a_SlotNum)
}
// If an OnSlotChanged callback has been registered, call it:
- if (m_OnSlotChangedFnRef != LUA_REFNIL)
+ if (m_OnSlotChanged != nullptr)
{
- m_Plugin->CallbackWindowSlotChanged(m_OnSlotChangedFnRef, *this, a_SlotNum);
+ m_OnSlotChanged->Call(this, a_SlotNum);
}
}