add StringWillUseAlternate

stepmania/src/BitmapText.cpp

@@ -231,12 +231,8 @@ void BitmapText::SetText( CString sText, CString sAlternateText )
 {
 	ASSERT( m_pFont );
 
-	if(sAlternateText.size())
-	{
-		if(!m_pFont->FontCompleteForString(CStringToWstring(sText)) &&
-			m_pFont->FontCompleteForString(CStringToWstring(sAlternateText)))
-			sText = sAlternateText;
-	}
+	if(StringWillUseAlternate(sText, sAlternateText))
+		sText = sAlternateText;
 
 	if(m_szText == sText)
 		return;
@@ -250,6 +246,22 @@ void BitmapText::SetText( CString sText, CString sAlternateText )
 	BuildChars();
 }
 
+bool BitmapText::StringWillUseAlternate(CString sText, CString sAlternateText) const
+{
+	ASSERT( m_pFont );
+
+	/* Can't use the alternate if there isn't one. */
+	if(!sAlternateText.size()) return false;
+
+	/* False if the alternate isn't needed. */
+	if(m_pFont->FontCompleteForString(CStringToWstring(sText))) return false;
+
+	/* False if the alternate is also incomplete. */
+	if(!m_pFont->FontCompleteForString(CStringToWstring(sAlternateText))) return false;
+
+	return true;
+}
+
 void BitmapText::CropToWidth( int iMaxWidthInSourcePixels )
 {
 	iMaxWidthInSourcePixels = max( 0, iMaxWidthInSourcePixels );

stepmania/src/BitmapText.h

@@ -40,6 +40,8 @@ public:
 	void SetVertAlign( VertAlign va );
 
 	CString GetText() const { return m_szText; }
+	/* Return true if the string 's' will use an alternate string, if available. */
+	bool StringWillUseAlternate(CString sText, CString sAlternateText) const;
 
 public:
 	Font* m_pFont;