/** Return the previous dot for this Notehead, or null if this is the first one.
* Don't set the anchor to the previous dot, because the anchor should
* always be the Notehead.
*/
private AugmentationDot getPreviousDot()
{
if (_gotPreviousDot)
{
return(_previousDot);
}
// Search for the previous AugmentationDot before a Notehead
_previousDot = null;
for (int i = getIndex() - 1; i >= 0; --i)
{
MusicSymbol symbol = getParentTimeSlice().getMusicSymbol(i);
if (symbol is Notehead)
{
break;
}
if (symbol is AugmentationDot)
{
_previousDot = (AugmentationDot)symbol;
break;
}
}
_gotPreviousDot = true;
return(_previousDot);
}
/** This is a utility function to return the screen X position of
* a left-positioned symbol (as defined by isLeftPositioned()).
* This finds the hotspot of the next symbol in the time slice
* which isLeftPositioned() (or the hotspot of the time slice itself
* if there are no more) and subtracts from its X value
* the (measure width - 10) / (the measure symbol count - 1).
*/
protected int findLeftPositionedX()
{
FinalPoint nextHotspot = null;
for (int i = getIndex() + 1; i < getParentTimeSlice().getMusicSymbolCount(); ++i)
{
MusicSymbol nextSymbol = getParentTimeSlice().getMusicSymbol(i);
if (nextSymbol.isLeftPositionedSymbol())
{
nextHotspot = nextSymbol.getScreenHotspot();
break;
}
}
if (nextHotspot == null)
{
// No next left positioned symbol, so use the time slice
nextHotspot = getParentTimeSlice().getScreenHotspot();
}
MeasureStartTimeSlice measure = getParentTimeSlice().getParentMeasureStart();
// Note that we know measure.getSymbolCount() is at least one
return(nextHotspot.x -
(measure.getWidth() - 10) / (measure.getSymbolCount() - 1));
}
/** Return the number of noteheads which have been found for this
* stem.
* Even though this is private, we always use getNoteheadCount() instead of
* looking at _noteheads directly, because this allows us to
* delay computing it as long as possible.
*/
private int getNoteheadCount()
{
if (_noteheads == null)
{
// Set _noteheads to all noteheads belonging to this stem
_noteheads = new List <Notehead>();
for (int i = getIndex() + 1; i < getParentTimeSlice().getMusicSymbolCount(); ++i)
{
MusicSymbol musicSymbol = getParentTimeSlice().getMusicSymbol(i);
if (musicSymbol is Stem)
{
// We have started a new Stem
break;
}
if (musicSymbol is Notehead)
{
_noteheads.Add((Notehead)musicSymbol);
}
}
}
return(_noteheads.Count);
}
/** Return the previous instance of the given class type looking
* backwards from this MusicSymbol at all previous MusicSymbols
* in the same staff.
* For example, previousInstanceOfInStaff(Notehead.class) gets the
* previous Notehead in the staff.
*
* @param desiredClass Class object for the MusicSymbol being sought
* @return the previous MusicSymbol of the desired class in the
* same staff, or null if not found.
*/
public MusicSymbol previousInstanceOfInStaff(Type desiredClass)
{
MusicSymbol previous = previousInstanceOfInScore(desiredClass);
// Check if this is the same staff
if (getParentTimeSlice().getParentMeasureStart().getParentStaff() ==
previous.getParentTimeSlice().getParentMeasureStart().getParentStaff())
{
return(previous);
}
// There was none in the same staff.
return(null);
}
/** This is a utility method which returns a list of nodes in this ID group for
* objects of the same type. If there is no numberOfNodes tag
* (which defines the first node in the multi-node symbol), this returns
* a new empty Vector. If there is a numberOfNodes tag, this creates a new Vector
* and adds the given number of nodes of the same type and with the
* same ID tag, including this first node, and stops searching after that
* number have been found. If this reaches the end of the Score before
* the required number have been found, this also stops, and the returned
* Vector will not be complete. If a subsequent node of
* the same type and ID, which also has a numberOfNodes tag, is encountered
* before the number of nodes are found, this does not add it and stops searching.
*/
protected IList <MusicSymbol> findMultiNodes()
{
var result = new List <MusicSymbol>();
if (_tags.numberOfNodes() == null)
{
// This is not a starting node.
return(result);
}
if (_tags.id() == null)
{
// This shouldn't really happen, so just return null.
return(result);
}
int numberOfNodes = _tags.numberOfNodes().Value;
int id = _tags.id().Value;
// Add this as the first one.
result.Add(this);
// Note that nextInstanceOfInScore(getClass()) only returns the same type
for (MusicSymbol node = nextInstanceOfInScore(GetType());
node != null && result.Count < numberOfNodes;
node = node.nextInstanceOfInScore(GetType()))
{
if (!node.getTags().id().HasValue || node.getTags().id().Value != id)
{
continue;
}
if (node.getTags().numberOfNodes() != null)
{
// Unexpectedly starting a new multi-node symbol. Just
// return what we have so far.
return(result);
}
result.Add(node);
}
return(result);
}
/** Return the anchor as the previous Notehead.
* Even though this is private, we always use getAnchor() instead of
* looking at _anchor directly, because this allows us to
* delay computing it as long as possible.
*/
private Anchored getAnchor()
{
if (_anchor != null)
{
return(_anchor);
}
MusicSymbol previousNotehead = previousInstanceOf(typeof(Notehead));
if (previousNotehead == null)
{
// DEBUG: maybe this should be an error
_anchor = findDefaultAnchor();
}
else
{
_anchor = previousNotehead;
}
return(_anchor);
}
/** Return the anchor as the previous Notehead or Rest.
* Even though this is private, we always use getAnchor() instead of
* looking at _anchor directly, because this allows us to
* delay computing it as long as possible.
*/
private Anchored getAnchor()
{
if (_anchor != null)
{
return(_anchor);
}
MusicSymbol previousNotehead = previousInstanceOf(typeof(Notehead));
MusicSymbol previousRest = previousInstanceOf(typeof(Rest));
if (previousNotehead == null && previousRest == null)
{
// DEBUG: maybe this should be an error
_anchor = findDefaultAnchor();
}
else if (previousRest == null)
{
// There is only a notehead
_anchor = previousNotehead;
}
else if (previousNotehead == null)
{
// There is only a rest
_anchor = previousRest;
}
else
{
// Use the most recent notehead or rest
if (previousNotehead.getIndex() > previousRest.getIndex())
{
_anchor = previousNotehead;
}
else
{
_anchor = previousRest;
}
}
return(_anchor);
}
/** This reads chunks from parentInput's input stream until the next
* NIFF time slice or no more bytesRemaining in the input,
* adding the chunks to the timeSlice's music symbol list. If a music
* symbol is not recognized, this skips it.
* This stops at either a measure start or an event time slice.
*
* @param parentInput the parent RIFF object being used to read the input stream
* @param timeSlice the TimeSlice to which MusicSymbol objects are added.
* @see MusicSymbol
*/
static public void addMusicSymbols(Riff parentInput, TimeSlice timeSlice)
{
while (parentInput.getBytesRemaining() > 0)
{
if (parentInput.peekFOURCC().Equals(RIFF_ID))
{
// encoutered the next time slice, so quit
// Note that this stops at either a measure start or an event time slice.
return;
}
MusicSymbol musicSymbol = maybeNewAnyMusicSymbol(parentInput);
if (musicSymbol != null)
{
timeSlice.addMusicSymbol(musicSymbol);
}
else
{
// Did not recognize the music symbol, so skip
parentInput.skipChunk();
}
}
}
/** Add the given mysicSymbol to the MusicSymbol list.
* This does not call invalidate(), but you may need to before displaying.
*
* @param mysicSymbol the MusicSymbol to add. It is an error if
* this is already the child of an object.
* @throws HeirarchyException if the mysicSymbol has already
* been added as a child to another object.
* @see #invalidate
*/
public void addMusicSymbol(MusicSymbol mysicSymbol)
{
addChild(mysicSymbol);
}
/** Add the given mysicSymbol to the MusicSymbol list.
* This does not call invalidate(), but you may need to before displaying.
*
* @param mysicSymbol the MusicSymbol to add. It is an error if
* this is already the child of an object.
* @throws HeirarchyException if the mysicSymbol has already
* been added as a child to another object.
* @see #invalidate
*/
public void addMusicSymbol(MusicSymbol mysicSymbol)
{
addChild(mysicSymbol);
}
