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/*
Rosegarden
A sequencer and musical notation editor.
This program is Copyright 2000-2008
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <bownie@bownie.com>
The moral right of the authors to claim authorship of this work
has been asserted.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version. See the file
COPYING included with this distribution for more information.
*/
#include "Staff.h"
namespace Rosegarden
{
Staff::Staff(Segment &t) :
m_segment(t),
m_viewElementList(0)
{
// empty
}
Staff::~Staff()
{
if (m_viewElementList) m_segment.removeObserver(this);
notifySourceDeletion();
delete m_viewElementList;
}
ViewElementList *
Staff::getViewElementList()
{
return getViewElementList(m_segment.begin(), m_segment.end());
}
ViewElementList *
Staff::getViewElementList(Segment::iterator from,
Segment::iterator to)
{
if (!m_viewElementList) {
m_viewElementList = new ViewElementList;
for (Segment::iterator i = from; i != to; ++i) {
if (!wrapEvent(*i)) continue;
ViewElement *el = makeViewElement(*i);
m_viewElementList->insert(el);
}
m_segment.addObserver(this);
}
return m_viewElementList;
}
bool
Staff::wrapEvent(Event *e)
{
timeT emt = m_segment.getEndMarkerTime();
return
(e->getAbsoluteTime() < emt) ||
(e->getAbsoluteTime() == emt && e->getDuration() == 0);
}
ViewElementList::iterator
Staff::findEvent(Event *e)
{
// Note that we have to create this using the virtual
// makeViewElement, because the result of equal_range depends on
// the value of the view absolute time for the element, which
// depends on the particular subclass of ViewElement in use.
//!!! (This is also why this method has to be here and not in
// ViewElementList -- ViewElementList has no equivalent of
// makeViewElement. Possibly things like NotationElementList
// should be subclasses of ViewElementList that implement
// makeViewElement instead of having makeViewElement in Staff, but
// that's for another day.)
ViewElement *dummy = makeViewElement(e);
std::pair<ViewElementList::iterator,
ViewElementList::iterator>
r = m_viewElementList->equal_range(dummy);
delete dummy;
for (ViewElementList::iterator i = r.first; i != r.second; ++i) {
if ((*i)->event() == e) {
return i;
}
}
return m_viewElementList->end();
}
void
Staff::eventAdded(const Segment *t, Event *e)
{
assert(t == &m_segment);
(void)t; // avoid warnings
if (wrapEvent(e)) {
ViewElement *el = makeViewElement(e);
m_viewElementList->insert(el);
notifyAdd(el);
}
}
void
Staff::eventRemoved(const Segment *t, Event *e)
{
assert(t == &m_segment);
(void)t; // avoid warnings
// If we have it, lose it
ViewElementList::iterator i = findEvent(e);
if (i != m_viewElementList->end()) {
notifyRemove(*i);
m_viewElementList->erase(i);
return;
}
// std::cerr << "Event at " << e->getAbsoluteTime() << ", notation time " << e->getNotationAbsoluteTime() << ", type " << e->getType()
// << " not found in Staff" << std::endl;
}
void
Staff::endMarkerTimeChanged(const Segment *segment, bool shorten)
{
Segment *s = const_cast<Segment *>(segment);
assert(s == &m_segment);
if (shorten) {
m_viewElementList->erase
(m_viewElementList->findTime(s->getEndMarkerTime()),
m_viewElementList->end());
} else {
timeT myLastEltTime = s->getStartTime();
if (m_viewElementList->end() != m_viewElementList->begin()) {
ViewElementList::iterator i = m_viewElementList->end();
myLastEltTime = (*--i)->event()->getAbsoluteTime();
}
for (Segment::iterator j = s->findTime(myLastEltTime);
s->isBeforeEndMarker(j); ++j) {
ViewElementList::iterator newi = findEvent(*j);
if (newi == m_viewElementList->end()) {
m_viewElementList->insert(makeViewElement(*j));
}
}
}
}
void
Staff::segmentDeleted(const Segment *s)
{
assert(s == &m_segment);
(void)s; // avoid warnings
/*
std::cerr << "WARNING: Staff notified of segment deletion: this is probably a bug "
<< "(staff should have been deleted before segment)" << std::endl;
*/
}
void
Staff::notifyAdd(ViewElement *e) const
{
for (ObserverSet::const_iterator i = m_observers.begin();
i != m_observers.end(); ++i) {
(*i)->elementAdded(this, e);
}
}
void
Staff::notifyRemove(ViewElement *e) const
{
for (ObserverSet::const_iterator i = m_observers.begin();
i != m_observers.end(); ++i) {
(*i)->elementRemoved(this, e);
}
}
void
Staff::notifySourceDeletion() const
{
for (ObserverSet::const_iterator i = m_observers.begin();
i != m_observers.end(); ++i) {
(*i)->staffDeleted(this);
}
}
}
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