[splittiming] PlayerOptions -> HasTimingChanges.

Steps gained most of the functionality and lua doc.
Leaving song version in: may still have a use
thanks to #DISPLAYBPM.

Docs/Luadoc/Lua.xml

@@ -1349,6 +1349,7 @@
 			<Function name='GetMeter'/>
 			<Function name='GetRadarValues'/>
 			<Function name='GetStepsType'/>
+			<Function name='HasSignificantTimingChanges'/>
 			<Function name='IsAPlayerEdit'/>
 			<Function name='IsAnEdit'/>
 			<Function name='IsAutogen'/>

Docs/Luadoc/LuaDocumentation.xml

@@ -3368,6 +3368,9 @@
 	<Function name='GetMeter' return='int' arguments=''>
 		Returns the numerical difficulty of the Steps.
 	</Function>
+        <Function name='HasSignificantTimingChanges' sm-ssc='true' return='bool' arguments=''>
+                Returns <code>true</code> if the song has significant timing changes.
+        </Function>
 	<Function name='GetRadarValues' return='RadarValues' arguments='PlayerNumber pn'>
 		Returns the complete list of RadarValues for player <code>pn</code>. Use <Link class='RadarValues' function='GetValue' /> to grab a specific value.
 	</Function>

src/PlayerOptions.cpp

@@ -680,7 +680,7 @@ bool PlayerOptions::operator==( const PlayerOptions &other ) const
 
 bool PlayerOptions::IsEasierForSongAndSteps( Song* pSong, Steps* pSteps, PlayerNumber pn ) const
 {
-	if( m_fTimeSpacing && pSong->HasSignificantBpmChangesOrStops() )
+	if( m_fTimeSpacing && pSteps->HasSignificantTimingChanges() )
 		return true;
 	const RadarValues &rv = pSteps->GetRadarValues( pn );
 	if( m_bTransforms[TRANSFORM_NOHOLDS] && rv[RadarCategory_Holds]>0 )

src/Steps.cpp

@@ -402,6 +402,21 @@ void Steps::SetMeter( int meter )
 	m_iMeter = meter;
 }
 
+bool Steps::HasSignificantTimingChanges() const
+{
+	if( m_Timing.HasStops() )
+		return true;
+	
+	/* TODO: Deal with DisplayBPM here...if possible?
+	 * Song's version may still be useful. */
+	
+	else if( m_Timing.HasBpmChanges() || m_Timing.HasWarps() || m_Timing.HasSpeedChanges() )
+	{
+		return true;
+	}
+	return false;
+}
+
 void Steps::SetCachedRadarValues( const RadarValues v[NUM_PLAYERS] )
 {
 	DeAutogen();
@@ -426,6 +441,8 @@ public:
 	DEFINE_METHOD( IsAnEdit,	IsAnEdit() )
 	DEFINE_METHOD( IsAPlayerEdit,	IsAPlayerEdit() )
 
+	static int HasSignificantTimingChanges( T* p, lua_State *L )	{ lua_pushboolean(L, p->HasSignificantTimingChanges()); return 1; }
+	
 	static int GetRadarValues( T* p, lua_State *L )
 	{
 		PlayerNumber pn = Enum::Check<PlayerNumber>(L, 1);
@@ -454,6 +471,7 @@ public:
 		ADD_METHOD( GetFilename );
 		ADD_METHOD( GetHash );
 		ADD_METHOD( GetMeter );
+		ADD_METHOD( HasSignificantTimingChanges );
 		ADD_METHOD( GetRadarValues );
 		//ADD_METHOD( GetSMNoteData );
 		ADD_METHOD( GetStepsType );

src/Steps.h

@@ -120,6 +120,11 @@ public:
 
 	/** @brief Timing data */
 	TimingData m_Timing;
+	
+	/**
+	 * @brief Determine if the Steps have any major timing changes during gameplay.
+	 * @return true if it does, or false otherwise. */
+	bool HasSignificantTimingChanges() const;
 
 	// Lua
 	void PushSelf( lua_State *L );