add "jump to next note", "jump to previous note"

stepmania/src/NoteDataUtil.cpp

@@ -1975,6 +1975,71 @@ bool NoteDataUtil::AnyTapsAndHoldsInTrackRange( const NoteData& in, int iTrack,
 	return false;
 }
 
+/* Find the next row that either starts a TapNote, or ends a previous one. */
+bool NoteDataUtil::GetNextEditorPosition( const NoteData& in, int &rowInOut )
+{
+	int iOriginalRow = rowInOut;
+	bool bAnyHaveNextNote = in.GetNextTapNoteRowForAllTracks( rowInOut );
+
+	int iClosestNextRow = rowInOut;
+	if( !bAnyHaveNextNote )
+		iClosestNextRow = MAX_NOTE_ROW;
+
+	for( int t=0; t<in.GetNumTracks(); t++ )
+	{
+		int iHeadRow;
+		if( !in.IsHoldHeadOrBodyAtRow(t, iOriginalRow, &iHeadRow) )
+			continue;
+
+		const TapNote &tn = in.GetTapNote( t, iHeadRow );
+		int iEndRow = iHeadRow + tn.iDuration;
+		if( iEndRow == iOriginalRow )
+			continue;
+
+		bAnyHaveNextNote = true;
+		ASSERT( iEndRow < MAX_NOTE_ROW );
+		iClosestNextRow = min( iClosestNextRow, iEndRow );
+	}
+
+	if( !bAnyHaveNextNote )
+		return false;
+
+	rowInOut = iClosestNextRow;
+	return true;
+}
+
+bool NoteDataUtil::GetPrevEditorPosition( const NoteData& in, int &rowInOut )
+{
+	int iOriginalRow = rowInOut;
+	bool bAnyHavePrevNote = in.GetPrevTapNoteRowForAllTracks( rowInOut );
+
+	int iClosestPrevRow = rowInOut;
+	for( int t=0; t<in.GetNumTracks(); t++ )
+	{
+		int iHeadRow = iOriginalRow;
+		if( !in.GetPrevTapNoteRowForTrack(t, iHeadRow) )
+			continue;
+
+		const TapNote &tn = in.GetTapNote( t, iHeadRow );
+		if( tn.type != TapNote::hold_head )
+			continue;
+
+		int iEndRow = iHeadRow + tn.iDuration;
+		if( iEndRow >= iOriginalRow )
+			continue;
+
+		bAnyHavePrevNote = true;
+		ASSERT( iEndRow < MAX_NOTE_ROW );
+		iClosestPrevRow = max( iClosestPrevRow, iEndRow );
+	}
+
+	if( !bAnyHavePrevNote )
+		return false;
+
+	rowInOut = iClosestPrevRow;
+	return true;
+}
+
 
 /*
  * (c) 2001-2004 Chris Danford, Glenn Maynard

stepmania/src/NoteDataUtil.h

@@ -108,6 +108,9 @@ namespace NoteDataUtil
 
 	int GetNumUsedTracks( const NoteData& in );
 	bool AnyTapsAndHoldsInTrackRange( const NoteData& in, int iTrack, int iStart, int iEnd );
+
+	bool GetNextEditorPosition( const NoteData& in, int &rowInOut );
+	bool GetPrevEditorPosition( const NoteData& in, int &rowInOut );
 };
 
 #endif

stepmania/src/ScreenEdit.cpp

@@ -122,6 +122,8 @@ void ScreenEdit::InitEditMappings()
 	m_EditMappings.button[EDIT_BUTTON_SCROLL_DOWN_PAGE][0] = DeviceInput(DEVICE_KEYBOARD, KEY_PGDN);
 	m_EditMappings.button[EDIT_BUTTON_SCROLL_HOME][0] = DeviceInput(DEVICE_KEYBOARD, KEY_HOME);
 	m_EditMappings.button[EDIT_BUTTON_SCROLL_END][0] = DeviceInput(DEVICE_KEYBOARD, KEY_END);
+	m_EditMappings.button[EDIT_BUTTON_SCROLL_NEXT][0] = DeviceInput(DEVICE_KEYBOARD, KEY_PERIOD);
+	m_EditMappings.button[EDIT_BUTTON_SCROLL_PREV][0] = DeviceInput(DEVICE_KEYBOARD, KEY_COMMA);
 
 	m_EditMappings.button    [EDIT_BUTTON_SCROLL_SPEED_UP][0] = DeviceInput(DEVICE_KEYBOARD, KEY_UP);
 	m_EditMappings.hold[EDIT_BUTTON_SCROLL_SPEED_UP][0] = DeviceInput(DEVICE_KEYBOARD, KEY_LCTRL);
@@ -1154,6 +1156,20 @@ void ScreenEdit::InputEdit( const DeviceInput& DeviceI, const InputEventType typ
 			ScrollTo( fDestinationBeat );
 		}
 		break;
+	case EDIT_BUTTON_SCROLL_NEXT:
+		{
+			int iRow = BeatToNoteRow( GAMESTATE->m_fSongBeat );
+			NoteDataUtil::GetNextEditorPosition( m_NoteDataEdit, iRow );
+			ScrollTo( NoteRowToBeat(iRow) );
+		}
+		break;
+	case EDIT_BUTTON_SCROLL_PREV:
+		{
+			int iRow = BeatToNoteRow( GAMESTATE->m_fSongBeat );
+			NoteDataUtil::GetPrevEditorPosition( m_NoteDataEdit, iRow );
+			ScrollTo( NoteRowToBeat(iRow) );
+		}
+		break;
 	case EDIT_BUTTON_SNAP_NEXT:
 		if( m_SnapDisplay.PrevSnapMode() )
 			OnSnapModeChange();

stepmania/src/ScreenEdit.h

@@ -46,6 +46,8 @@ enum EditButton
 	EDIT_BUTTON_SCROLL_DOWN_PAGE,
 	EDIT_BUTTON_SCROLL_HOME,
 	EDIT_BUTTON_SCROLL_END,
+	EDIT_BUTTON_SCROLL_NEXT,
+	EDIT_BUTTON_SCROLL_PREV,
 
 	/* These are modifiers to EDIT_BUTTON_SCROLL_*. */
 	EDIT_BUTTON_SCROLL_SELECT,