Add SetNextScreenName(string) and SetPrevScreenName(string) Lua bindings to Screen

Docs/Changelog_sm-ssc.txt

@@ -17,6 +17,8 @@ sm-ssc v1.2 | 201012xx
 --------
 * SM5SVN r28586: Only unload fonts if not used by the next screen. [shakesoda]
 * [ScreenSelectMaster] Fix DoSwitchAnyways to actually work again.
+* [Screen] Added SetNextScreenName(string) and SetPrevScreenName(string)
+  Lua bindings. [freem]
 
 20101220
 --------

src/Screen.cpp

@@ -84,6 +84,7 @@ void Screen::BeginScreen()
 	/* Screens set these when they determine their next screen dynamically.  Reset them
 	 * here, so a reused screen doesn't inherit these from the last time it was used. */
 	m_sNextScreen = RString();
+	m_sPrevScreen = RString();
 	
 	m_fLockInputSecs = 0;
 
@@ -250,6 +251,8 @@ RString Screen::GetNextScreenName() const
 
 RString Screen::GetPrevScreen() const
 {
+	if( !m_sPrevScreen.empty() )
+		return m_sPrevScreen;
 	return PREV_SCREEN;
 }
 
@@ -283,6 +286,8 @@ class LunaScreen: public Luna<Screen>
 public:
 	static int GetNextScreenName( T* p, lua_State *L ) { lua_pushstring(L, p->GetNextScreenName() ); return 1; }
 	static int GetPrevScreenName( T* p, lua_State *L ) { lua_pushstring(L, p->GetPrevScreen() ); return 1; }
+	static int SetNextScreenName( T* p, lua_State *L ) { p->SetNextScreen(SArg(1)); return 0; }
+	static int SetPrevScreenName( T* p, lua_State *L ) { p->SetPrevScreen(SArg(1)); return 0; }
 	static int lockinput( T* p, lua_State *L ) { p->SetLockInputSecs(FArg(1)); return 0; }
 	DEFINE_METHOD( GetScreenType,	GetScreenType() )
 
@@ -298,6 +303,8 @@ public:
 	{
 		ADD_METHOD( GetNextScreenName );
 		ADD_METHOD( GetPrevScreenName );
+		ADD_METHOD( SetNextScreenName );
+		ADD_METHOD( SetPrevScreenName );
 		ADD_METHOD( PostScreenMessage );
 		ADD_METHOD( lockinput );
 		ADD_METHOD( GetScreenType );

src/Screen.h

@@ -86,6 +86,7 @@ protected:
 
 	// If left blank, the NextScreen metric will be used.
 	RString m_sNextScreen;
+	RString m_sPrevScreen;
 	ScreenMessage m_smSendOnPop;
 
 	float m_fLockInputSecs;
@@ -96,6 +97,8 @@ protected:
 public:
 	RString GetNextScreenName() const;
 	RString GetPrevScreen() const;
+	void SetNextScreen(RString sNextScreen){ m_sNextScreen = sNextScreen; };
+	void SetPrevScreen(RString sPrevScreen){ m_sPrevScreen = sPrevScreen; };
 
 	// let subclass override if they want
 	virtual void MenuUp(	const InputEventPlus &input ) { }