//=============================================================================
//  MuseScore
//  Music Composition & Notation
//
//  Copyright (C) 2002-2011 Werner Schweer
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2
//  as published by the Free Software Foundation and appearing in
//  the file LICENCE.GPL
//=============================================================================

/**
 \file
 Implementation of class Score (partial).
*/

#include <assert.h>
#include "score.h"
#include "fermata.h"
#include "imageStore.h"
#include "key.h"
#include "sig.h"
#include "clef.h"
#include "tempo.h"
#include "measure.h"
#include "page.h"
#include "undo.h"
#include "system.h"
#include "select.h"
#include "segment.h"
#include "xml.h"
#include "text.h"
#include "note.h"
#include "chord.h"
#include "rest.h"
#include "slur.h"
#include "staff.h"
#include "part.h"
#include "style.h"
#include "tuplet.h"
#include "lyrics.h"
#include "pitchspelling.h"
#include "line.h"
#include "volta.h"
#include "repeat.h"
#include "ottava.h"
#include "barline.h"
#include "box.h"
#include "utils.h"
#include "excerpt.h"
#include "stafftext.h"
#include "repeatlist.h"
#include "keysig.h"
#include "beam.h"
#include "stafftype.h"
#include "tempotext.h"
#include "articulation.h"
#include "revisions.h"
#include "tie.h"
#include "tiemap.h"
#include "layoutbreak.h"
#include "harmony.h"
#include "mscore.h"
#ifdef OMR
#include "omr/omr.h"
#endif
#include "bracket.h"
#include "audio.h"
#include "instrtemplate.h"
#include "sym.h"
#include "rehearsalmark.h"
#include "breath.h"
#include "instrchange.h"
#include "synthesizerstate.h"

namespace Ms {

MasterScore* gscore;                 ///< system score, used for palettes etc.
std::set<Score*> Score::validScores;

bool noSeq           = false;
bool noMidi          = false;
bool midiInputTrace  = false;
bool midiOutputTrace = false;

//---------------------------------------------------------
//   MeasureBaseList
//---------------------------------------------------------

MeasureBaseList::MeasureBaseList()
      {
      _first = 0;
      _last  = 0;
      _size  = 0;
      };

//---------------------------------------------------------
//   push_back
//---------------------------------------------------------

void MeasureBaseList::push_back(MeasureBase* e)
      {
      ++_size;
      if (_last) {
            _last->setNext(e);
            e->setPrev(_last);
            e->setNext(0);
            }
      else {
            _first = e;
            e->setPrev(0);
            e->setNext(0);
            }
      _last = e;
      }

//---------------------------------------------------------
//   push_front
//---------------------------------------------------------

void MeasureBaseList::push_front(MeasureBase* e)
      {
      ++_size;
      if (_first) {
            _first->setPrev(e);
            e->setNext(_first);
            e->setPrev(0);
            }
      else {
            _last = e;
            e->setPrev(0);
            e->setNext(0);
            }
      _first = e;
      }

//---------------------------------------------------------
//   add
//    insert e before e->next()
//---------------------------------------------------------

void MeasureBaseList::add(MeasureBase* e)
      {
      MeasureBase* el = e->next();
      if (el == 0) {
            push_back(e);
            return;
            }
      if (el == _first) {
            push_front(e);
            return;
            }
      ++_size;
      e->setPrev(el->prev());
      el->prev()->setNext(e);
      el->setPrev(e);
      }

//---------------------------------------------------------
//   remove
//---------------------------------------------------------

void MeasureBaseList::remove(MeasureBase* el)
      {
      --_size;
      if (el->prev())
            el->prev()->setNext(el->next());
      else
            _first = el->next();
      if (el->next())
            el->next()->setPrev(el->prev());
      else
            _last = el->prev();
      }

//---------------------------------------------------------
//   insert
//---------------------------------------------------------

void MeasureBaseList::insert(MeasureBase* fm, MeasureBase* lm)
      {
      ++_size;
      for (MeasureBase* m = fm; m != lm; m = m->next())
            ++_size;
      MeasureBase* pm = fm->prev();
      if (pm)
            pm->setNext(fm);
      else
            _first = fm;
      MeasureBase* nm = lm->next();
      if (nm)
            nm->setPrev(lm);
      else
            _last = lm;
      }

//---------------------------------------------------------
//   remove
//---------------------------------------------------------

void MeasureBaseList::remove(MeasureBase* fm, MeasureBase* lm)
      {
      --_size;
      for (MeasureBase* m = fm; m != lm; m = m->next())
            --_size;
      MeasureBase* pm = fm->prev();
      MeasureBase* nm = lm->next();
      if (pm)
            pm->setNext(nm);
      else
            _first = nm;
      if (nm)
            nm->setPrev(pm);
      else
            _last = pm;
      }

//---------------------------------------------------------
//   change
//---------------------------------------------------------

void MeasureBaseList::change(MeasureBase* ob, MeasureBase* nb)
      {
      nb->setPrev(ob->prev());
      nb->setNext(ob->next());
      if (ob->prev())
            ob->prev()->setNext(nb);
      if (ob->next())
            ob->next()->setPrev(nb);
      if (ob == _last)
            _last = nb;
      if (ob == _first)
            _first = nb;
      if (nb->type() == ElementType::HBOX || nb->type() == ElementType::VBOX
         || nb->type() == ElementType::TBOX || nb->type() == ElementType::FBOX)
            nb->setSystem(ob->system());
      foreach(Element* e, nb->el())
            e->setParent(nb);
      }

//---------------------------------------------------------
//   Score
//---------------------------------------------------------

Score::Score()
   : ScoreElement(this), _selection(this), _selectionFilter(this)
      {
      Score::validScores.insert(this);
      _masterScore = 0;
      Layer l;
      l.name          = "default";
      l.tags          = 1;
      _layer.append(l);
      _layerTags[0]   = "default";

      _scoreFont = ScoreFont::fontFactory("emmentaler");

      _fileDivision           = MScore::division;
      _style  = MScore::defaultStyle();
//      accInfo = tr("No selection");     // ??
      accInfo = "No selection";
      }

Score::Score(MasterScore* parent, bool forcePartStyle /* = true */)
   : Score{}
      {
      Score::validScores.insert(this);
      _masterScore = parent;
      if (MScore::defaultStyleForParts())
            _style = *MScore::defaultStyleForParts();
      else {
            // inherit most style settings from parent
            _style = parent->style();

            static const Sid styles[] = {
                  Sid::pageWidth,
                  Sid::pageHeight,
                  Sid::pagePrintableWidth,
                  Sid::pageEvenLeftMargin,
                  Sid::pageOddLeftMargin,
                  Sid::pageEvenTopMargin,
                  Sid::pageEvenBottomMargin,
                  Sid::pageOddTopMargin,
                  Sid::pageOddBottomMargin,
                  Sid::pageTwosided,
                  Sid::spatium
                  };
            // but borrow defaultStyle page layout settings
            for (auto i : styles)
                  _style.set(i, MScore::defaultStyle().value(i));
            // and force some style settings that just make sense for parts
            if (forcePartStyle) {
                  style().set(Sid::concertPitch, false);
                  style().set(Sid::createMultiMeasureRests, true);
                  style().set(Sid::dividerLeft, false);
                  style().set(Sid::dividerRight, false);
                  }
            }
      // update style values
      _style.precomputeValues();
      _synthesizerState = parent->_synthesizerState;
      _mscVersion = parent->_mscVersion;
      }

Score::Score(MasterScore* parent, const MStyle& s)
   : Score{parent}
      {
      Score::validScores.insert(this);
      _style  = s;
      }

//---------------------------------------------------------
//   ~Score
//---------------------------------------------------------

Score::~Score()
      {
      Score::validScores.erase(this);

      foreach(MuseScoreView* v, viewer)
            v->removeScore();
      // deselectAll();
      qDeleteAll(_systems); // systems are layout-only objects so we delete
                            // them prior to measures.
      for (MeasureBase* m = _measures.first(); m;) {
            MeasureBase* nm = m->next();
            if (m->isMeasure() && toMeasure(m)->mmRest())
                  delete toMeasure(m)->mmRest();
            delete m;
            m = nm;
            }

      for (auto it = _spanner.cbegin(); it != _spanner.cend(); ++it)
            delete it->second;
      _spanner.clear();

      qDeleteAll(_parts);
      qDeleteAll(_staves);
//      qDeleteAll(_pages);         // TODO: check
      _masterScore = 0;

      imageStore.clearUnused();
      }

//---------------------------------------------------------
//   Score::clone
//         To create excerpt clone to show when changing PageSettings
//         Use MasterScore::clone() instead
//---------------------------------------------------------

Score* Score::clone()
      {
      QBuffer buffer;
      buffer.open(QIODevice::WriteOnly);
      XmlWriter xml(this, &buffer);
      xml.header();

      xml.stag("museScore version=\"" MSC_VERSION "\"");
      write(xml, false);
      xml.etag();

      buffer.close();

      XmlReader r(buffer.buffer());
      MasterScore* score = new MasterScore(style());
      score->read1(r, true);

      score->addLayoutFlags(LayoutFlag::FIX_PITCH_VELO);
      score->doLayout();
      return score;
      }

//---------------------------------------------------------
//   Score::onElementDestruction
//    Ensure correct state of the score after destruction
//    of the element (e.g. remove invalid pointers etc.).
//---------------------------------------------------------

void Score::onElementDestruction(Element* e)
      {
      Score* score = e->score();
      if (!score || Score::validScores.find(score) == Score::validScores.end()) {
            // No score or the score is already deleted
            return;
            }
      score->selection().remove(e);
      score->cmdState().unsetElement(e);
      for (MuseScoreView* v : score->viewer)
            v->onElementDestruction(e);
      }

//---------------------------------------------------------
//   addMeasure
//---------------------------------------------------------

void Score::addMeasure(MeasureBase* m, MeasureBase* pos)
      {
      m->setNext(pos);
      _measures.add(m);
      }

//---------------------------------------------------------
//    fixTicks
//    update:
//      - measure ticks
//      - tempo map
//      - time signature map
//---------------------------------------------------------

/**
 This is needed after
      - inserting or removing a measure
      - changing the sigmap
      - after inserting/deleting time (changes the sigmap)
*/

void Score::fixTicks()
      {
      Fraction tick = Fraction(0,1);
      Measure* fm = firstMeasure();
      if (fm == 0)
            return;

      for (Staff* staff : _staves)
            staff->clearTimeSig();

      if (isMaster()) {
            tempomap()->clear();
            sigmap()->clear();
            sigmap()->add(0, SigEvent(fm->ticks(),  fm->timesig(), 0));
            }

      for (MeasureBase* mb = first(); mb; mb = mb->next()) {
            if (mb->type() != ElementType::MEASURE) {
                  mb->setTick(tick);
                  continue;
                  }
            Measure* m            = toMeasure(mb);
            Fraction mtick        = m->tick();
            Fraction diff         = tick - mtick;
            Fraction measureTicks = m->ticks();
            m->moveTicks(diff);
            if (m->mmRest())
                  m->mmRest()->moveTicks(diff);

            rebuildTempoAndTimeSigMaps(m);

            tick += measureTicks;
            }
      // Now done in getNextMeasure(), do we keep?
      if (tempomap()->empty())
            tempomap()->setTempo(0, _defaultTempo);
      }

//---------------------------------------------------------
//    fixTicks
///    updates tempomap and time sig map for a measure
//---------------------------------------------------------

void Score::rebuildTempoAndTimeSigMaps(Measure* measure)
      {
      if (isMaster()) {
            // Reset tempo to set correct time stretch for fermata.
            const Fraction& startTick = measure->tick();
            resetTempoRange(startTick, measure->endTick());

            // Implement section break rest
            for (MeasureBase* mb = measure->prev(); mb && mb->endTick() == startTick; mb = mb->prev()) {
                  if (mb->pause())
                        setPause(startTick, mb->pause());
                  }

            // Add pauses from the end of the previous measure (at measure->tick()):
            for (Segment* s = measure->first(); s && s->tick() == startTick; s = s->prev1()) {
                  if (!s->isBreathType())
                        continue;
                  qreal length = 0.0;
                  for (Element* e : s->elist()) {
                        if (e && e->isBreath())
                              length = qMax(length, toBreath(e)->pause());
                        }
                  if (length != 0.0)
                        setPause(startTick, length);
                  }
            }

      for (Segment& segment : measure->segments()) {
            if (segment.isBreathType()) {
                  if (!isMaster())
                        continue;
                  qreal length = 0.0;
                  Fraction tick = segment.tick();
                  // find longest pause
                  for (int i = 0, n = ntracks(); i < n; ++i) {
                        Element* e = segment.element(i);
                        if (e && e->isBreath()) {
                              Breath* b = toBreath(e);
                              length = qMax(length, b->pause());
                              }
                        }
                  if (length != 0.0)
                        setPause(tick, length);
                  }
            else if (segment.isTimeSigType()) {
                  for (int staffIdx = 0; staffIdx < _staves.size(); ++staffIdx) {
                        TimeSig* ts = toTimeSig(segment.element(staffIdx * VOICES));
                        if (ts)
                              staff(staffIdx)->addTimeSig(ts);
                        }
                  }
            else if (segment.isChordRestType()) {
                  if (!isMaster())
                        continue;
                  qreal stretch = 0.0;
                  for (Element* e : segment.annotations()) {
                        if (e->isFermata() && toFermata(e)->play())
                              stretch = qMax(stretch, toFermata(e)->timeStretch());
                        else if (e->isTempoText()) {
                              TempoText* tt = toTempoText(e);
                              if (tt->isRelative())
                                    tt->updateRelative();
                              setTempo(tt->segment(), tt->tempo());
                              }
                        }
                  if (stretch != 0.0 && stretch != 1.0) {
                        qreal otempo = tempomap()->tempo(segment.tick().ticks());
                        qreal ntempo = otempo / stretch;
                        setTempo(segment.tick(), ntempo);
                        Fraction etick = segment.tick() + segment.ticks() - Fraction(1, 480*4);
                        auto e = tempomap()->find(etick.ticks());
                        if (e == tempomap()->end())
                              setTempo(etick, otempo);
                        }
                  }
            }

      // update time signature map
      // create event if measure len and time signature are different
      // even if they are equivalent 4/4 vs 2/2
      // also check if nominal time signature has changed

      if (isMaster()) {
            const Measure* m = measure;
            const Fraction mTicks = m->isMMRest() ? m->mmRestFirst()->ticks() : m->ticks(); // for time signature the underlying measure length matters for MM rests

            const Measure* pm = measure->prevMeasure();
            // prevMeasure() doesn't return MM rest so we don't handle it here

            if (pm && (!mTicks.identical(pm->ticks()) || !m->timesig().identical(pm->timesig())))
                  sigmap()->add(m->tick().ticks(), SigEvent(mTicks, m->timesig(), m->no()));
            }
      }

//---------------------------------------------------------
//   validSegment
//---------------------------------------------------------

static bool validSegment(Segment* s, int startTrack, int endTrack)
      {
      for (int track = startTrack; track < endTrack; ++track) {
            if (s->element(track))
                  return true;
            }
      return false;
      }

//---------------------------------------------------------
//   pos2measure
//     Return measure for canvas relative position \a p.
//---------------------------------------------------------

Measure* Score::pos2measure(const QPointF& p, int* rst, int* pitch, Segment** seg, QPointF* offset) const
      {
      Measure* m = searchMeasure(p);
      if (m == 0)
            return 0;

      System* s = m->system();
      qreal y   = p.y() - s->canvasPos().y();

      int i = 0;
      for (; i < nstaves();) {
            SysStaff* stff = s->staff(i);
            if (!stff->show() || !staff(i)->show()) {
                  ++i;
                  continue;
                  }
            int ni = i;
            for (;;) {
                  ++ni;
                  if (ni == nstaves() || (s->staff(ni)->show() && staff(ni)->show()))
                        break;
                  }

            qreal sy2;
            if (ni != nstaves()) {
                  SysStaff* nstaff = s->staff(ni);
                  qreal s1y2 = stff->bbox().y() + stff->bbox().height();
                  sy2 = s1y2 + (nstaff->bbox().y() - s1y2)/2;
                  }
            else
                  sy2 = s->page()->height() - s->pos().y();   // s->height();
            if (y > sy2) {
                  i   = ni;
                  continue;
                  }
            break;
            }

      // search for segment + offset
      QPointF pppp = p - m->canvasPos();
      int strack = i * VOICES;
      if (!staff(i))
            return 0;
//      int etrack = staff(i)->part()->nstaves() * VOICES + strack;
      int etrack = VOICES + strack;

      SysStaff* sstaff = m->system()->staff(i);
      SegmentType st = SegmentType::ChordRest;
      for (Segment* segment = m->first(st); segment; segment = segment->next(st)) {
            if (!validSegment(segment, strack, etrack))
                  continue;
            Segment* ns = segment->next(st);
            for (; ns; ns = ns->next(st)) {
                  if (validSegment(ns, strack, etrack))
                        break;
                  }
            if (!ns || (pppp.x() < (segment->x() + (ns->x() - segment->x())/2.0))) {
                  *rst = i;
                  if (pitch) {
                        Staff* s1 = _staves[i];
                        Fraction tick  = segment->tick();
                        ClefType clef = s1->clef(tick);
                        *pitch = y2pitch(pppp.y() - sstaff->bbox().y(), clef, s1->spatium(tick));
                        }
                  if (offset)
                        *offset = pppp - QPointF(segment->x(), sstaff->bbox().y());
                  if (seg)
                        *seg = segment;
                  return m;
                  }
            }
      return 0;
      }

//---------------------------------------------------------
//   dragPosition
//    on input:
//          p   - canvas relative drag position
//          rst - current staff index
//          seg - current segment
//    on output:
//          rst - new staff index for drag position
//          seg - new segment for drag position
//---------------------------------------------------------

void Score::dragPosition(const QPointF& p, int* rst, Segment** seg) const
      {
      Measure* m = searchMeasure(p);
      if (m == 0)
            return;

      System* s = m->system();
      qreal y   = p.y() - s->canvasPos().y();

      int i;
      for (i = 0; i < nstaves();) {
            SysStaff* stff = s->staff(i);
            if (!stff->show() || !staff(i)->show()) {
                  ++i;
                  continue;
                  }
            int ni = i;
            for (;;) {
                  ++ni;
                  if (ni == nstaves() || (s->staff(ni)->show() && staff(ni)->show()))
                        break;
                  }

            qreal sy2;
            if (ni != nstaves()) {
                  SysStaff* nstaff = s->staff(ni);
                  qreal s1y2       = stff->bbox().y() + stff->bbox().height();
                  if (i == *rst)
                        sy2 = s1y2 + (nstaff->bbox().y() - s1y2);
                  else if (ni == *rst)
                        sy2 = s1y2;
                  else
                        sy2 = s1y2 + (nstaff->bbox().y() - s1y2) * .5;
                  }
            else
                  sy2 = s->page()->height() - s->pos().y();
            if (y > sy2) {
                  i   = ni;
                  continue;
                  }
            break;
            }

      // search for segment + offset
      QPointF pppp = p - m->canvasPos();
      int strack   = i * VOICES;
      if (!staff(i))
            return;
      int etrack = staff(i)->part()->nstaves() * VOICES + strack;

      SegmentType st = SegmentType::ChordRest;
      for (Segment* segment = m->first(st); segment; segment = segment->next(st)) {
            if (!validSegment(segment, strack, etrack))
                  continue;
            Segment* ns = segment->next(st);
            for (; ns; ns = ns->next(st)) {
                  if (validSegment(ns, strack, etrack))
                        break;
                  }
            if (!ns) {
                  *rst = i;
                  *seg = segment;
                  return;
                  }
            if (*seg == segment) {
                  if (pppp.x() < (segment->x() + (ns->x() - segment->x()))) {
                        *rst = i;
                        *seg = segment;
                        return;
                        }
                  }
            else if (*seg == ns) {
                  if (pppp.x() <= segment->x()) {
                        *rst = i;
                        *seg = segment;
                        return;
                        }
                  }
            else {
                  if (pppp.x() < (segment->x() + (ns->x() - segment->x())/2.0)) {
                        *rst = i;
                        *seg = segment;
                        return;
                        }
                  }
            }
      return;
      }

//---------------------------------------------------------
//   setShowInvisible
//---------------------------------------------------------

void Score::setShowInvisible(bool v)
      {
      _showInvisible = v;
      setUpdateAll();
      }

//---------------------------------------------------------
//   setShowUnprintable
//---------------------------------------------------------

void Score::setShowUnprintable(bool v)
      {
      _showUnprintable = v;
      setUpdateAll();
      }

//---------------------------------------------------------
//   setShowFrames
//---------------------------------------------------------

void Score::setShowFrames(bool v)
      {
      _showFrames = v;
      setUpdateAll();
      }

//---------------------------------------------------------
//   setShowPageborders
//---------------------------------------------------------

void Score::setShowPageborders(bool v)
      {
      _showPageborders = v;
      setUpdateAll();
      }

//---------------------------------------------------------
//   setMarkIrregularMeasures
//---------------------------------------------------------

void Score::setMarkIrregularMeasures(bool v)
      {
      _markIrregularMeasures = v;
      setUpdateAll();
      }

//---------------------------------------------------------
//   readOnly
//---------------------------------------------------------

bool Score::readOnly() const
      {
      return _masterScore->readOnly();
      }

//---------------------------------------------------------
//   dirty
//---------------------------------------------------------

bool Score::dirty() const
      {
      return !undoStack()->isClean();
      }

//---------------------------------------------------------
//   state
//---------------------------------------------------------

ScoreContentState Score::state() const
      {
      return std::make_pair(this, undoStack()->state());
      }

//---------------------------------------------------------
//   playlistDirty
//---------------------------------------------------------

bool Score::playlistDirty() const
      {
      return masterScore()->playlistDirty();
      }

//---------------------------------------------------------
//   setPlaylistDirty
//---------------------------------------------------------

void Score::setPlaylistDirty()
      {
      masterScore()->setPlaylistDirty();
      }

//---------------------------------------------------------
//   setPlaylistDirty
//---------------------------------------------------------

void MasterScore::setPlaylistDirty()
      {
      _playlistDirty = true;
      _repeatList->setScoreChanged();
      }

//---------------------------------------------------------
//   spell
//---------------------------------------------------------

void Score::spell()
      {
      for (int i = 0; i < nstaves(); ++i) {
            std::vector<Note*> notes;
            for (Segment* s = firstSegment(SegmentType::All); s; s = s->next1()) {
                  int strack = i * VOICES;
                  int etrack = strack + VOICES;
                  for (int track = strack; track < etrack; ++track) {
                        Element* e = s->element(track);
                        if (e && e->type() == ElementType::CHORD)
                              notes.insert(notes.end(),
                                 toChord(e)->notes().begin(),
                                 toChord(e)->notes().end());
                        }
                  }
            spellNotelist(notes);
            }
      }

void Score::spell(int startStaff, int endStaff, Segment* startSegment, Segment* endSegment)
      {
      for (int i = startStaff; i < endStaff; ++i) {
            std::vector<Note*> notes;
            for (Segment* s = startSegment; s && s != endSegment; s = s->next()) {
                  int strack = i * VOICES;
                  int etrack = strack + VOICES;
                  for (int track = strack; track < etrack; ++track) {
                        Element* e = s->element(track);
                        if (e && e->type() == ElementType::CHORD)
                              notes.insert(notes.end(),
                                 toChord(e)->notes().begin(),
                                 toChord(e)->notes().end());
                        }
                  }
            spellNotelist(notes);
            }
      }

//---------------------------------------------------------
//   prevNote
//---------------------------------------------------------

Note* prevNote(Note* n)
      {
      Chord* chord = n->chord();
      Segment* seg = chord->segment();
      const std::vector<Note*> nl = chord->notes();
      auto i = std::find(nl.begin(), nl.end(), n);
      if (i != nl.begin())
            return *(i-1);
      int staff      = n->staffIdx();
      int startTrack = staff * VOICES + n->voice() - 1;
      int endTrack   = 0;
      while (seg) {
            if (seg->segmentType() == SegmentType::ChordRest) {
                  for (int track = startTrack; track >= endTrack; --track) {
                        Element* e = seg->element(track);
                        if (e && e->type() == ElementType::CHORD)
                              return toChord(e)->upNote();
                        }
                  }
            seg = seg->prev1();
            startTrack = staff * VOICES + VOICES - 1;
            }
      return n;
      }

//---------------------------------------------------------
//   nextNote
//---------------------------------------------------------

static Note* nextNote(Note* n)
      {
      Chord* chord = n->chord();
      const std::vector<Note*> nl = chord->notes();
      auto i = std::find(nl.begin(), nl.end(), n);
      if (i != nl.end()) {
            ++i;
            if (i != nl.end())
                  return *i;
            }
      Segment* seg   = chord->segment();
      int staff      = n->staffIdx();
      int startTrack = staff * VOICES + n->voice() + 1;
      int endTrack   = staff * VOICES + VOICES;
      while (seg) {
            if (seg->segmentType() == SegmentType::ChordRest) {
                  for (int track = startTrack; track < endTrack; ++track) {
                        Element* e = seg->element(track);
                        if (e && e->type() == ElementType::CHORD) {
                              return ((Chord*)e)->downNote();
                              }
                        }
                  }
            seg = seg->next1();
            startTrack = staff * VOICES;
            }
      return n;
      }

//---------------------------------------------------------
//   spell
//---------------------------------------------------------

void Score::spell(Note* note)
      {
      std::vector<Note*> notes;

      notes.push_back(note);
      Note* nn = nextNote(note);
      notes.push_back(nn);
      nn = nextNote(nn);
      notes.push_back(nn);
      nn = nextNote(nn);
      notes.push_back(nn);

      nn = prevNote(note);
      notes.insert(notes.begin(), nn);
      nn = prevNote(nn);
      notes.insert(notes.begin(), nn);
      nn = prevNote(nn);
      notes.insert(notes.begin(), nn);

      int opt = Ms::computeWindow(notes, 0, 7);
      note->setTpc(Ms::tpc(3, note->pitch(), opt));
      }

//---------------------------------------------------------
//   appendPart
//---------------------------------------------------------

void Score::appendPart(Part* p)
      {
      _parts.append(p);
      }

//---------------------------------------------------------
//   searchPage
//    p is in canvas coordinates
//---------------------------------------------------------

Page* Score::searchPage(const QPointF& p) const
      {
      for (Page* page : pages()) {
            QRectF r = page->bbox().translated(page->pos());
            if (r.contains(p))
                  return page;
            }
      return 0;
      }

//---------------------------------------------------------
//   searchSystem
//    return list of systems as there may be more than
//    one system in a row
//    p is in canvas coordinates
//---------------------------------------------------------

QList<System*> Score::searchSystem(const QPointF& pos) const
      {
      QList<System*> systems;
      Page* page = searchPage(pos);
      if (page == 0)
            return systems;
      qreal y = pos.y() - page->pos().y();  // transform to page relative
      const QList<System*>* sl = &page->systems();
      qreal y2;
      int n = sl->size();
      for (int i = 0; i < n; ++i) {
            System* s = sl->at(i);
            System* ns = 0;               // next system row
            int ii = i + 1;
            for (; ii < n; ++ii) {
                  ns = sl->at(ii);
                  if (ns->y() != s->y())
                        break;
                  }
            if ((ii == n) || (ns == 0))
                  y2 = page->height();
            else {
                  qreal sy2 = s->y() + s->bbox().height();
                  y2         = sy2 + (ns->y() - sy2) * .5;
                  }
            if (y < y2) {
                  systems.append(s);
                  for (int iii = i+1; ii < n; ++iii) {
                        if (sl->at(iii)->y() != s->y())
                              break;
                        systems.append(sl->at(iii));
                        }
                  return systems;
                  }
            }
      return systems;
      }

//---------------------------------------------------------
//   searchMeasure
//    p is in canvas coordinates
//---------------------------------------------------------

Measure* Score::searchMeasure(const QPointF& p) const
      {
      QList<System*> systems = searchSystem(p);
      for (System* system : systems) {
            qreal x = p.x() - system->canvasPos().x();
            for (MeasureBase* mb : system->measures()) {
                  if (mb->isMeasure() && (x < (mb->x() + mb->bbox().width())))
                        return toMeasure(mb);
                  }
            }
      return 0;
      }

//---------------------------------------------------------
//    getNextValidInputSegment
//    - s is of type SegmentType::ChordRest
//---------------------------------------------------------

static Segment* getNextValidInputSegment(Segment* s, int track, int voice)
      {
      if (s == 0)
            return 0;
      Q_ASSERT(s->segmentType() == SegmentType::ChordRest);
      // Segment* s1 = s;
      ChordRest* cr1 = nullptr;
      for (Segment* s1 = s; s1; s1 = s1->prev(SegmentType::ChordRest)) {
            cr1 = toChordRest(s1->element(track + voice));
            if (cr1)
                  break;
            }
      Fraction nextTick = (cr1 == nullptr) ? s->measure()->tick() : cr1->tick() + cr1->actualTicks();

      static const SegmentType st { SegmentType::ChordRest };
      while (s) {
            if (s->element(track + voice))
                  break;
            if (voice && s->tick() == nextTick)
                  return s;
#if 0
            int v;
            for (v = 0; v < VOICES; ++v) {
                  if (s->element(track + v))
                        break;
                  }
            if ((v != VOICES) && voice) {
                  int ntick;
                  bool skipChord = false;
                  bool ns        = false;
                  for (Segment* s1 = s->measure()->first(st); s1; s1 = s1->next(st)) {
                        ChordRest* cr = toChordRest(s1->element(track + voice));
                        if (cr) {
                              if (ns)
                                    return s1;
                              ntick = s1->tick() + cr->actualTicks();
                              skipChord = true;
                              }
                        if (s1 == s)
                              ns = true;
                        if (skipChord) {
                              if (s->tick() >= ntick)
                                    skipChord = false;
                              }
                        if (!skipChord && ns)
                              return s1;
                        }
                  if (!skipChord)
                        return s;
                  }
#endif
            s = s->next(st);
            }
      return s;
      }

//---------------------------------------------------------
//   getPosition
//    return true if valid position found
//---------------------------------------------------------

bool Score::getPosition(Position* pos, const QPointF& p, int voice) const
      {
      Measure* measure = searchMeasure(p);
      if (measure == 0)
            return false;

      pos->fret = FRET_NONE;
      //
      //    search staff
      //
      pos->staffIdx      = 0;
      SysStaff* sstaff   = 0;
      System* system     = measure->system();
      qreal y           = p.y() - system->pagePos().y();
      for (; pos->staffIdx < nstaves(); ++pos->staffIdx) {
            Staff* st = staff(pos->staffIdx);
            if (!st->part()->show())
                  continue;
            qreal sy2;
            SysStaff* ss = system->staff(pos->staffIdx);
            if (!ss->show())
                  continue;
            SysStaff* nstaff = 0;

            // find next visible staff
            for (int i = pos->staffIdx + 1; i < nstaves(); ++i) {
                  Staff* sti = staff(i);
                  if (!sti->part()->show())
                        continue;
                  nstaff = system->staff(i);
                  if (!nstaff->show()) {
                        nstaff = 0;
                        continue;
                        }
                  break;
                  }

            if (nstaff) {
                  qreal s1y2 = ss->bbox().bottom();
                  sy2        = system->page()->canvasPos().y() + s1y2 + (nstaff->bbox().y() - s1y2) * .5;
                  }
            else
                  sy2 = system->page()->canvasPos().y() + system->page()->height() - system->pagePos().y();   // system->height();
            if (y < sy2) {
                  sstaff = ss;
                  break;
                  }
            }
      if (sstaff == 0)
            return false;

      //
      //    search segment
      //
      QPointF pppp(p - measure->canvasPos());
      qreal x         = pppp.x();
      Segment* segment = 0;
      pos->segment     = 0;

      // int track = pos->staffIdx * VOICES + voice;
      int track = pos->staffIdx * VOICES;

      for (segment = measure->first(SegmentType::ChordRest); segment;) {
            segment = getNextValidInputSegment(segment, track, voice);
            if (segment == 0)
                  break;
            Segment* ns = getNextValidInputSegment(segment->next(SegmentType::ChordRest), track, voice);

            qreal x1 = segment->x();
            qreal x2;
            qreal d;
            if (ns) {
                  x2    = ns->x();
                  d     = x2 - x1;
                  }
            else {
                  x2    = measure->bbox().width();
                  d     = (x2 - x1) * 2.0;
                  x     = x1;
                  pos->segment = segment;
                  break;
                  }

            if (x < (x1 + d * .5)) {
                  x = x1;
                  pos->segment = segment;
                  break;
                  }
            segment = ns;
            }
      if (segment == 0)
            return false;
      //
      // TODO: restrict to reasonable values (pitch 0-127)
      //
      Staff* s      = staff(pos->staffIdx);
      qreal mag     = s->mag(segment->tick());
      Fraction tick = segment->tick();
      // in TABs, step from one string to another; in other staves, step on and between lines
      qreal lineDist = s->staffType(tick)->lineDistance().val() * (s->isTabStaff(measure->tick()) ? 1 : .5) * mag * spatium();

      pos->line  = lrint((pppp.y() - sstaff->bbox().y()) / lineDist);
      if (s->isTabStaff(measure->tick())) {
            if (pos->line < -1 || pos->line > s->lines(tick)+1)
                  return false;
            if (pos->line < 0)
                  pos->line = 0;
            else if (pos->line >= s->lines(tick))
                  pos->line = s->lines(tick) - 1;
            }
      else {
            int minLine   = absStep(0);
            ClefType clef = s->clef(pos->segment->tick());
            minLine       = relStep(minLine, clef);
            int maxLine   = absStep(127);
            maxLine       = relStep(maxLine, clef);

            if (pos->line > minLine || pos->line < maxLine)
                  return false;
            }

      y         = sstaff->y() + pos->line * lineDist;
      pos->pos  = QPointF(x, y) + measure->canvasPos();
      return true;
      }

//---------------------------------------------------------
//   checkHasMeasures
//---------------------------------------------------------

bool Score::checkHasMeasures() const
      {
      Page* page = pages().isEmpty() ? 0 : pages().front();
      const QList<System*>* sl = page ? &page->systems() : 0;
      if (sl == 0 || sl->empty() || sl->front()->measures().empty()) {
            qDebug("first create measure, then repeat operation");
            return false;
            }
      return true;
      }

#if 0
//---------------------------------------------------------
//   moveBracket
//    columns are counted from right to left
//---------------------------------------------------------

void Score::moveBracket(int staffIdx, int srcCol, int dstCol)
      {
      for (System* system : systems())
            system->moveBracket(staffIdx, srcCol, dstCol);
      }
#endif

//---------------------------------------------------------
//   spatiumHasChanged
//---------------------------------------------------------

static void spatiumHasChanged(void* data, Element* e)
      {
      qreal* val = (qreal*)data;
      e->spatiumChanged(val[0], val[1]);
      }

//---------------------------------------------------------
//   spatiumChanged
//---------------------------------------------------------

void Score::spatiumChanged(qreal oldValue, qreal newValue)
      {
      qreal data[2];
      data[0] = oldValue;
      data[1] = newValue;
      scanElements(data, spatiumHasChanged, true);
      for (Staff* staff : _staves)
            staff->spatiumChanged(oldValue, newValue);
      _noteHeadWidth = _scoreFont->width(SymId::noteheadBlack, newValue / SPATIUM20);
      }

//---------------------------------------------------------
//   updateStyle
//---------------------------------------------------------

static void updateStyle(void*, Element* e)
      {
      bool v = e->generated();
      e->styleChanged();
      e->setGenerated(v);
      }

//---------------------------------------------------------
//   styleChanged
//    must be called after every style change
//---------------------------------------------------------

void Score::styleChanged()
      {
      scanElements(0, updateStyle);
      if (headerText())
            headerText()->styleChanged();
      if (footerText())
            footerText()->styleChanged();
      setLayoutAll();
      }

//---------------------------------------------------------
//   getCreateMeasure
//    - return Measure for tick
//    - create new Measure(s) if there is no measure for
//      this tick
//---------------------------------------------------------

Measure* Score::getCreateMeasure(const Fraction& tick)
      {
      Measure* last = lastMeasure();
      if (last == 0 || ((last->tick() + last->ticks()) <= tick)) {
            Fraction lastTick  = last ? (last->tick()+last->ticks()) : Fraction(0,1);
            while (tick >= lastTick) {
                  Measure* m = new Measure(this);
                  Fraction ts = sigmap()->timesig(lastTick).timesig();
                  m->setTick(lastTick);
                  m->setTimesig(ts);
                  m->setTicks(ts);
                  measures()->add(toMeasureBase(m));
                  lastTick += Fraction::fromTicks(ts.ticks());
                  }
            }
      return tick2measure(tick);
      }

//---------------------------------------------------------
//   addElement
//---------------------------------------------------------

/**
 Add \a element to its parent.

 Several elements (clef, keysig, timesig) need special handling, as they may cause
 changes throughout the score.
*/

void Score::addElement(Element* element)
      {
      Element* parent = element->parent();
      element->triggerLayout();

//      qDebug("Score(%p) Element(%p)(%s) parent %p(%s)",
//         this, element, element->name(), parent, parent ? parent->name() : "");

      ElementType et = element->type();
      if (et == ElementType::MEASURE
         || (et == ElementType::HBOX && !(parent && parent->isVBox()))
         || et == ElementType::VBOX
         || et == ElementType::TBOX
         || et == ElementType::FBOX
         ) {
            measures()->add(toMeasureBase(element));
            element->triggerLayout();
            return;
            }

      if (parent)
            parent->add(element);

      switch (et) {
            case ElementType::BEAM:
                  {
                  Beam* b = toBeam(element);
                  int n = b->elements().size();
                  for (int i = 0; i < n; ++i)
                        b->elements().at(i)->setBeam(b);
                  }
                  break;

            case ElementType::SLUR:
                  addLayoutFlags(LayoutFlag::PLAY_EVENTS);
                  // fall through

            case ElementType::VOLTA:
            case ElementType::TRILL:
            case ElementType::VIBRATO:
            case ElementType::PEDAL:
            case ElementType::TEXTLINE:
            case ElementType::HAIRPIN:
            case ElementType::LET_RING:
            case ElementType::PALM_MUTE:
                  {
                  Spanner* spanner = toSpanner(element);
                  if (et == ElementType::TEXTLINE && spanner->anchor() == Spanner::Anchor::NOTE)
                        break;
                  addSpanner(spanner);
                  for (SpannerSegment* ss : spanner->spannerSegments()) {
                        if (ss->system())
                              ss->system()->add(ss);
                        }
                  }
                  break;

            case ElementType::OTTAVA:
                  {
                  Ottava* o = toOttava(element);
                  addSpanner(o);
                  foreach(SpannerSegment* ss, o->spannerSegments()) {
                        if (ss->system())
                              ss->system()->add(ss);
                        }
                  cmdState().layoutFlags |= LayoutFlag::FIX_PITCH_VELO;
                  o->staff()->updateOttava();
                  setPlaylistDirty();
                  }
                  break;

            case ElementType::DYNAMIC:
                  cmdState().layoutFlags |= LayoutFlag::FIX_PITCH_VELO;
                  setPlaylistDirty();
                  break;

            case ElementType::TEMPO_TEXT:
                  fixTicks(); // rebuilds tempomap
                  break;

            case ElementType::INSTRUMENT_CHANGE: {
                  InstrumentChange* ic = toInstrumentChange(element);
                  ic->part()->setInstrument(ic->instrument(), ic->segment()->tick());
#if 0
                  int tickStart = ic->segment()->tick();
                  auto i = ic->part()->instruments()->upper_bound(tickStart);
                  int tickEnd;
                  if (i == ic->part()->instruments()->end())
                        tickEnd = -1;
                  else
                        tickEnd = i->first;
                  Interval oldV = ic->part()->instrument(tickStart)->transpose();
                  ic->part()->setInstrument(ic->instrument(), tickStart);
                  transpositionChanged(ic->part(), oldV, tickStart, tickEnd);
#endif
                  masterScore()->rebuildMidiMapping();
                  cmdState()._instrumentsChanged = true;
                  }
                  break;

            case ElementType::CHORD:
                  setPlaylistDirty();
                  // create playlist does not work here bc. tremolos may not be complete
                  // createPlayEvents(toChord(element));
                  break;

            case ElementType::NOTE:
            case ElementType::TREMOLO:
            case ElementType::ARTICULATION:
            case ElementType::ARPEGGIO:
                  {
                  Element* cr = parent;
                  if (cr->isChord())
                        createPlayEvents(toChord(cr));
                  }
                  break;

            default:
                  break;
            }
      element->triggerLayout();
      }

//---------------------------------------------------------
//   removeElement
///   Remove \a element from its parent.
///   Several elements (clef, keysig, timesig) need special handling, as they may cause
///   changes throughout the score.
//---------------------------------------------------------

void Score::removeElement(Element* element)
      {
      Element* parent = element->parent();
      element->triggerLayout();

//      qDebug("Score(%p) Element(%p)(%s) parent %p(%s)",
//         this, element, element->name(), parent, parent ? parent->name() : "");

      // special for MEASURE, HBOX, VBOX
      // their parent is not static

      ElementType et = element->type();

      if (et == ElementType::MEASURE
         || (et == ElementType::HBOX && !parent->isVBox())
         || et == ElementType::VBOX
         || et == ElementType::TBOX
         || et == ElementType::FBOX
            ) {
            MeasureBase* mb = toMeasureBase(element);
            measures()->remove(mb);
            System* system = mb->system();

            if (!system) { // vertical boxes are not shown in continuous view so no system
                  Q_ASSERT(lineMode() && (element->isVBox() || element->isTBox()));
                  return;
                  }

            Page* page = system->page();
            if (element->isBox() && system->measures().size() == 1) {
                  auto i = std::find(page->systems().begin(), page->systems().end(), system);
                  page->systems().erase(i);
                  mb->setSystem(0);
                  if (page->systems().isEmpty()) {
                        // Remove this page, since it is now empty.
                        // This involves renumbering and repositioning all subsequent pages.
                        QPointF pos = page->pos();
                        auto ii = std::find(pages().begin(), pages().end(), page);
                        pages().erase(ii);
                        while (ii != pages().end()) {
                              page = *ii;
                              page->setNo(page->no() - 1);
                              QPointF p = page->pos();
                              page->setPos(pos);
                              pos = p;
                              ii++;
                              }
                        }
                  }
//            setLayout(mb->tick());
            return;
            }

      if (et == ElementType::BEAM) {          // beam parent does not survive layout
            element->setParent(0);
            parent = 0;
            }

      if (parent)
            parent->remove(element);

      switch (et) {
            case ElementType::BEAM:
                  for (ChordRest* cr : toBeam(element)->elements())
                        cr->setBeam(0);
                  break;

            case ElementType::SLUR:
                  addLayoutFlags(LayoutFlag::PLAY_EVENTS);
                  // fall through

            case ElementType::VOLTA:
            case ElementType::TRILL:
            case ElementType::VIBRATO:
            case ElementType::PEDAL:
            case ElementType::LET_RING:
            case ElementType::PALM_MUTE:
            case ElementType::TEXTLINE:
            case ElementType::HAIRPIN:
                  {
                  Spanner* spanner = toSpanner(element);
                  if (et == ElementType::TEXTLINE && spanner->anchor() == Spanner::Anchor::NOTE)
                        break;
                  spanner->triggerLayout();
                  removeSpanner(spanner);
                  }
                  break;

            case ElementType::OTTAVA:
                  {
                  Ottava* o = toOttava(element);
                  o->triggerLayout();
                  removeSpanner(o);
                  o->staff()->updateOttava();
                  cmdState().layoutFlags |= LayoutFlag::FIX_PITCH_VELO;
                  setPlaylistDirty();
                  }
                  break;

            case ElementType::DYNAMIC:
                  cmdState().layoutFlags |= LayoutFlag::FIX_PITCH_VELO;
                  setPlaylistDirty();
                  break;

            case ElementType::CHORD:
            case ElementType::REST:
                  {
                  ChordRest* cr = toChordRest(element);
                  if (cr->beam())
                        cr->beam()->remove(cr);
                  for (Lyrics* lyr : cr->lyrics())
                        lyr->removeFromScore();
                  // TODO: check for tuplet?
                  }
                  break;
            case ElementType::TEMPO_TEXT:
                  fixTicks(); // rebuilds tempomap
                  break;
            case ElementType::INSTRUMENT_CHANGE: {
                  InstrumentChange* ic = toInstrumentChange(element);
                  ic->part()->removeInstrument(ic->segment()->tick());
#if 0
                  int tickStart = ic->segment()->tick();
                  auto i = ic->part()->instruments()->upper_bound(tickStart);
                  int tickEnd;
                  if (i == ic->part()->instruments()->end())
                        tickEnd = -1;
                  else
                        tickEnd = i->first;
                  Interval oldV = ic->part()->instrument(tickStart)->transpose();
                  ic->part()->removeInstrument(tickStart);
                  transpositionChanged(ic->part(), oldV, tickStart, tickEnd);
#endif
                  masterScore()->rebuildMidiMapping();
                  cmdState()._instrumentsChanged = true;
                  }
                  break;

            case ElementType::TREMOLO:
            case ElementType::ARTICULATION:
            case ElementType::ARPEGGIO:
                  {
                  Element* cr = element->parent();
                  if (cr->isChord())
                        createPlayEvents(toChord(cr));
                  }
                  break;

            default:
                  break;
            }
      }

//---------------------------------------------------------
//   firstMeasure
//---------------------------------------------------------

Measure* Score::firstMeasure() const
      {
      MeasureBase* mb = _measures.first();
      while (mb && mb->type() != ElementType::MEASURE)
            mb = mb->next();

      return toMeasure(mb);
      }

//---------------------------------------------------------
//   firstMeasureMM
//---------------------------------------------------------

Measure* Score::firstMeasureMM() const
      {
      Measure* m = firstMeasure();
      if (m && styleB(Sid::createMultiMeasureRests) && m->hasMMRest())
            return m->mmRest();
      return m;
      }

//---------------------------------------------------------
//   firstMM
//---------------------------------------------------------

MeasureBase* Score::firstMM() const
      {
      MeasureBase* m = _measures.first();
      if (m
         && m->type() == ElementType::MEASURE
         && styleB(Sid::createMultiMeasureRests)
         && toMeasure(m)->hasMMRest()) {
            return toMeasure(m)->mmRest();
            }
      return m;
      }

//---------------------------------------------------------
//   measure
//---------------------------------------------------------

MeasureBase* Score::measure(int idx) const
      {
      MeasureBase* mb = _measures.first();
      for (int i = 0; i < idx; ++i) {
            mb = mb->next();
            if (mb == 0)
                  return 0;
            }
      return mb;
      }

//---------------------------------------------------------
//   crMeasure
//    Returns a measure containing chords an rests
//    by its index skipping other MeasureBase descendants
//---------------------------------------------------------

Measure* Score::crMeasure(int idx) const
      {
      int i = -1;
      for (MeasureBase* mb = _measures.first(); mb; mb = mb->next()) {
            if (mb->isMeasure())
                  ++i;
            if (i == idx)
                  return toMeasure(mb);
            }
      return nullptr;
      }

//---------------------------------------------------------
//   lastMeasure
//---------------------------------------------------------

Measure* Score::lastMeasure() const
      {
      MeasureBase* mb = _measures.last();
      while (mb && mb->type() != ElementType::MEASURE)
            mb = mb->prev();
      return toMeasure(mb);
      }

//---------------------------------------------------------
//   lastMeasureMM
//---------------------------------------------------------

Measure* Score::lastMeasureMM() const
      {
      Measure* m = lastMeasure();
      if (m && styleB(Sid::createMultiMeasureRests)) {
            Measure* m1 = const_cast<Measure*>(toMeasure(m->mmRest1()));
            if (m1)
                  return m1;
            }
      return m;
      }

//---------------------------------------------------------
//   endTick
//---------------------------------------------------------

Fraction Score::endTick() const
      {
      Measure* m = lastMeasure();
      return m ? m->endTick() : Fraction(0,1);
      }

//---------------------------------------------------------
//   firstSegment
//---------------------------------------------------------

Segment* Score::firstSegment(SegmentType segType) const
      {
      Segment* seg;
      Measure* m = firstMeasure();
      if (!m)
            seg = 0;
      else {
            seg = m->first();
            if (seg && !(seg->segmentType() & segType))
                  seg = seg->next1(segType);
            }

#ifdef SCRIPT_INTERFACE
      // if called from QML/JS, tell QML engine not to garbage collect this object
//      if (seg)
//            QQmlEngine::setObjectOwnership(seg, QQmlEngine::CppOwnership);
#endif
      return seg;
      }

//---------------------------------------------------------
//   firstSegmentMM
//---------------------------------------------------------

Segment* Score::firstSegmentMM(SegmentType segType) const
      {
      Measure* m = firstMeasureMM();
      return m ? m->first(segType) : 0;
      }

//---------------------------------------------------------
//   lastSegment
//---------------------------------------------------------

Segment* Score::lastSegment() const
      {
      Measure* m = lastMeasure();
      return m ? m->last() : 0;
      }

//---------------------------------------------------------
//   utick2utime
//---------------------------------------------------------

qreal Score::utick2utime(int tick) const
      {
      return repeatList().utick2utime(tick);
      }

//---------------------------------------------------------
//   utime2utick
//---------------------------------------------------------

int Score::utime2utick(qreal utime) const
      {
      return repeatList().utime2utick(utime);
      }

//---------------------------------------------------------
//   setExpandRepeats
//---------------------------------------------------------

void MasterScore::setExpandRepeats(bool expand)
      {
      if (_expandRepeats == expand)
            return;
      _expandRepeats = expand;
      setPlaylistDirty();
      }

//---------------------------------------------------------
//   updateRepeatListTempo
///   needed for usage in Seq::processMessages
//---------------------------------------------------------

void MasterScore::updateRepeatListTempo()
      {
      _repeatList->updateTempo();
      }

//---------------------------------------------------------
//   repeatList
//---------------------------------------------------------

const RepeatList& MasterScore::repeatList() const
      {
      _repeatList->update(_expandRepeats);
      return *_repeatList;
      }

//---------------------------------------------------------
//   inputPos
//---------------------------------------------------------

Fraction Score::inputPos() const
      {
      return _is.tick();
      }

//---------------------------------------------------------
//   scanElements
//    scan all elements
//---------------------------------------------------------

void Score::scanElements(void* data, void (*func)(void*, Element*), bool all)
      {
      for (MeasureBase* mb = first(); mb; mb = mb->next()) {
            mb->scanElements(data, func, all);
            if (mb->type() == ElementType::MEASURE) {
                  Measure* m = toMeasure(mb);
                  Measure* mmr = m->mmRest();
                  if (mmr)
                        mmr->scanElements(data, func, all);
                  }
            }
      for (Page* page : pages()) {
            for (System* s :page->systems())
                  s->scanElements(data, func, all);
            func(data, page);
            }
      }

//---------------------------------------------------------
//   scanElementsInRange
//---------------------------------------------------------

void Score::scanElementsInRange(void* data, void (*func)(void*, Element*), bool all)
      {
      Segment* startSeg = _selection.startSegment();
      for (Segment* s = startSeg; s && s !=_selection.endSegment(); s = s->next1()) {
            s->scanElements(data, func, all);
            Measure* m = s->measure();
            if (m && s == m->first()) {
                  Measure* mmr = m->mmRest();
                  if (mmr)
                        mmr->scanElements(data, func, all);
                  }
            }
      for (Element* e : _selection.elements()) {
            if (e->isSpanner()) {
                  Spanner* spanner = toSpanner(e);
                  for (SpannerSegment* ss : spanner->spannerSegments()) {
                        ss->scanElements(data, func, all);
                        }
                  }
            }
      }

//---------------------------------------------------------
//   setSelection
//---------------------------------------------------------

void Score::setSelection(const Selection& s)
      {
      deselectAll();
      _selection = s;

      foreach(Element* e, _selection.elements())
            e->setSelected(true);
      }

//---------------------------------------------------------
//   getText
//---------------------------------------------------------

Text* Score::getText(Tid tid)
      {
      MeasureBase* m = first();
      if (m && m->isVBox()) {
            for (Element* e : m->el()) {
                  if (e->isText() && toText(e)->tid() == tid)
                        return toText(e);
                  }
            }
      return 0;
      }

//---------------------------------------------------------
//   metaTag
//---------------------------------------------------------

QString Score::metaTag(const QString& s) const
      {
      if (_metaTags.contains(s))
            return _metaTags.value(s);
      return _masterScore->_metaTags.value(s);
      }

//---------------------------------------------------------
//   setMetaTag
//---------------------------------------------------------

void Score::setMetaTag(const QString& tag, const QString& val)
      {
      _metaTags.insert(tag, val);
      }

//---------------------------------------------------------
//   addExcerpt
//---------------------------------------------------------

void MasterScore::addExcerpt(Excerpt* ex)
      {
      Score* score = ex->partScore();

      for (Staff* s : score->staves()) {
            const LinkedElements* ls = s->links();
            if (ls == 0)
                  continue;
            for (auto le : *ls) {
                  Staff* ps = toStaff(le);
                  if (ps->score() == this) {
                        ex->parts().append(ps->part());
                        break;
                        }
                  }
            }
      if (ex->tracks().isEmpty()) {                         // SHOULDN'T HAPPEN, protected in the UI
            QMultiMap<int, int> tracks;
            for (Staff* s : score->staves()) {
                  const LinkedElements* ls = s->links();
                  if (ls == 0)
                        continue;
                  for (auto le : *ls) {
                        Staff* ps = toStaff(le);
                        if (ps->primaryStaff()) {
                              for (int i = 0; i < VOICES; i++)
                                    tracks.insert(ps->idx() * VOICES + i % VOICES, s->idx() * VOICES + i % VOICES);
                              break;
                              }
                        }
                  }
            ex->setTracks(tracks);
            }
      excerpts().append(ex);
      setExcerptsChanged(true);
      }

//---------------------------------------------------------
//   removeExcerpt
//---------------------------------------------------------

void MasterScore::removeExcerpt(Excerpt* ex)
      {
      if (excerpts().removeOne(ex)) {
            setExcerptsChanged(true);
            // delete ex;
            }
      else
            qDebug("removeExcerpt:: ex not found");
      }

//---------------------------------------------------------
//   clone
//---------------------------------------------------------

MasterScore* MasterScore::clone()
      {
      QBuffer buffer;
      buffer.open(QIODevice::WriteOnly);
      XmlWriter xml(this, &buffer);
      xml.header();

      xml.stag("museScore version=\"" MSC_VERSION "\"");
      write(xml, false);
      xml.etag();

      buffer.close();

      XmlReader r(buffer.buffer());
      MasterScore* score = new MasterScore(style());
      score->read1(r, true);

      score->addLayoutFlags(LayoutFlag::FIX_PITCH_VELO);
      score->doLayout();
      return score;
      }

//---------------------------------------------------------
//   setSynthesizerState
//---------------------------------------------------------

void Score::setSynthesizerState(const SynthesizerState& s)
      {
      // TODO: make undoable
      _synthesizerState = s;
      }

//---------------------------------------------------------
//   removeAudio
//---------------------------------------------------------

void Score::removeAudio()
      {
      delete _audio;
      _audio = 0;
      }

//---------------------------------------------------------
//   appendScore
//---------------------------------------------------------

bool Score::appendScore(Score* score, bool addPageBreak, bool addSectionBreak)
      {
      if (parts().size() < score->parts().size() || staves().size() < score->staves().size()) {
            qDebug("Score to append has %d parts and %d staves, but this score only has %d parts and %d staves.", score->parts().size(), score->staves().size(), parts().size(), staves().size());
            return false;
            }

      if (!last()) {
            qDebug("This score doesn't have any MeasureBase objects.");
            return false;
            }

      // apply Page/Section Breaks if desired
      if (addPageBreak) {
            if (!last()->pageBreak()) {
                  last()->undoSetBreak(false, LayoutBreak::Type::LINE); // remove line break if exists
                  last()->undoSetBreak(true, LayoutBreak::Type::PAGE);  // apply page break
                  }
            }
      else if (!last()->lineBreak() && !last()->pageBreak()) {
            last()->undoSetBreak(true, LayoutBreak::Type::LINE);
            }

      if (addSectionBreak && !last()->sectionBreak())
            last()->undoSetBreak(true, LayoutBreak::Type::SECTION);

      // match concert pitch states
      if (styleB(Sid::concertPitch) != score->styleB(Sid::concertPitch))
            score->cmdConcertPitchChanged(styleB(Sid::concertPitch), true);

      // clone the measures
      appendMeasuresFromScore(score, Fraction(0, 1), score->last()->endTick());

      setLayoutAll();
      return true;
      }

//---------------------------------------------------------
//   appendMeasuresFromScore
//     clone measures from another score to the end of this
//---------------------------------------------------------

bool Score::appendMeasuresFromScore(Score* score, const Fraction& startTick, const Fraction& endTick)
      {
      Fraction tickOfAppend = last()->endTick();
      MeasureBase* pmb = last();
      TieMap tieMap;

      MeasureBase* fmb = score->tick2measureBase(startTick);
      MeasureBase* emb = score->tick2measureBase(endTick);
      Fraction curTick = tickOfAppend;
      for (MeasureBase* cmb = fmb; cmb != emb; cmb = cmb->next()) {
            MeasureBase* nmb;
            if (cmb->isMeasure()) {
                  Measure* nm = toMeasure(cmb)->cloneMeasure(this, curTick, &tieMap);
                  curTick += nm->ticks();
                  nmb = toMeasureBase(nm);
                  }
            else {
                  nmb = cmb->clone();
                  }

            addMeasure(nmb, 0);
            nmb->setNext(0);
            nmb->setPrev(pmb);
            nmb->setScore(this);

            pmb->setNext(nmb);
            pmb = nmb;
            }

      Measure* firstAppendedMeasure = tick2measure(tickOfAppend);

      // if the appended score has less staves,
      // make sure the measures have full measure rest
      for (Measure* m = firstAppendedMeasure; m; m = m->nextMeasure())
            for (int staffIdx = 0; staffIdx < nstaves(); ++staffIdx) {
                  Fraction f;
                  for (Segment* s = m->first(SegmentType::ChordRest); s; s = s->next(SegmentType::ChordRest))
                        for (int v = 0; v < VOICES; ++v) {
                              ChordRest* cr = toChordRest(s->element(staffIdx * VOICES + v));
                              if (cr == 0) continue;
                              f += cr->actualTicks();
                              }
                  if (f.isZero())
                        addRest(m->tick(), staffIdx*VOICES, TDuration(TDuration::DurationType::V_MEASURE), 0);
                  }

      // at first added measure, check if we need to add Clef/Key/TimeSig
      //  this is needed if it was changed and needs to be changed back
      int n = nstaves();
      Fraction otick = fmb->tick(), ctick = tickOfAppend;
      for (int staffIdx = 0; staffIdx < n; ++staffIdx) { // iterate over all staves
            int trackIdx = staff2track(staffIdx); // idx of irst track on the staff
            Staff* staff = this->staff(staffIdx);
            Staff* ostaff = score->staff(staffIdx);

            // check if key signature needs to be changed
            if (ostaff->key(otick) != staff->key(ctick)) {
                  Segment* ns = firstAppendedMeasure->undoGetSegment(SegmentType::KeySig, ctick);
                  KeySigEvent nkse = KeySigEvent(ostaff->keySigEvent(otick));
                  KeySig* nks = new KeySig(this);
                  nks->setScore(this);
                  nks->setTrack(trackIdx);

                  nks->setKeySigEvent(nkse);
                  staff->setKey(ctick, nkse);
                  ns->add(nks);
                  }
            // check if a key signature is present but is spurious (i.e. no actual change)
            else if (staff->currentKeyTick(ctick) == ctick &&
                     staff->key(ctick - Fraction::fromTicks(1)) == ostaff->key(otick)) {
                        Segment* ns = firstAppendedMeasure->first(SegmentType::KeySig);
                        if (ns)
                              ns->remove(ns->element(trackIdx));
                  }

            // check if time signature needs to be changed
            TimeSig* ots = ostaff->timeSig(otick), * cts = staff->timeSig(ctick);
            TimeSig* pts = staff->timeSig(ctick - Fraction::fromTicks(1));
            if (ots && cts && *ots != *cts) {
                  Segment* ns = firstAppendedMeasure->undoGetSegment(SegmentType::TimeSig, ctick);
                  TimeSig* nsig = new TimeSig(*ots);

                  nsig->setScore(this);
                  nsig->setTrack(trackIdx);
                  ns->add(nsig);
                  }
            // check if a time signature is present but is spurious (i.e. no actual change)
            else if (staff->currentTimeSigTick(ctick) == ctick &&
                     ots && pts && *pts == *ots) {
                        Segment* ns = firstAppendedMeasure->first(SegmentType::TimeSig);
                        if (ns)
                              ns->remove(ns->element(trackIdx));
                  }

            // check if clef signature needs to be changed
            if (ostaff->clef(otick) != staff->clef(ctick)) {
                  undoChangeClef(staff, firstAppendedMeasure, ostaff->clef(otick));
                  }
            // check if a clef change is present but is spurious (i.e. no actual change)
            else if (staff->currentClefTick(ctick) == ctick &&
                     staff->clef(ctick - Fraction::fromTicks(1)) == ostaff->clef(otick)) {
                        Segment* ns = firstAppendedMeasure->first(SegmentType::Clef);
                        if (!ns)
                              ns = firstAppendedMeasure->first(SegmentType::HeaderClef);
                        if (ns)
                              ns->remove(ns->element(trackIdx));
                  }
            }

      // check if section starts with a pick-up measure to be merged with end of previous section
      Measure* cm = firstAppendedMeasure, * pm = cm->prevMeasure();
      if (pm->timesig() == cm->timesig() && pm->ticks() + cm->ticks() == cm->timesig())
            cmdJoinMeasure(pm, cm);

      // clone the spanners (only in the range currently copied)
      auto ospans = score->spanner();
      auto lb = ospans.lower_bound(startTick.ticks()), ub = ospans.upper_bound(endTick.ticks());
      for (auto sp = lb; sp != ub; sp++) {
            Spanner* spanner = sp->second;

            if (spanner->tick2() > endTick) continue; // map is by tick() so this can still happen in theory...

            Spanner* ns = toSpanner(spanner->clone());
            ns->setScore(this);
            ns->setParent(0);
            ns->setTick(spanner->tick() - startTick + tickOfAppend);
            ns->setTick2(spanner->tick2() - startTick + tickOfAppend);
            ns->computeStartElement();
            ns->computeEndElement();
            addElement(ns);
            }

      return true;
      }

//---------------------------------------------------------
//   splitStaff
//---------------------------------------------------------

void Score::splitStaff(int staffIdx, int splitPoint)
      {
//      qDebug("split staff %d point %d", staffIdx, splitPoint);

      //
      // create second staff
      //
      Staff* st = staff(staffIdx);
      Part*  p  = st->part();
      Staff* ns = new Staff(this);
      ns->init(st);
      ns->setPart(p);
      // convert staffIdx from score-relative to part-relative
      int staffIdxPart = staffIdx - p->staff(0)->idx();
      undoInsertStaff(ns, staffIdxPart + 1, false);

      Clef* clef = new Clef(this);
      clef->setClefType(ClefType::F);
      clef->setTrack((staffIdx+1) * VOICES);
      Segment* seg = firstMeasure()->getSegment(SegmentType::HeaderClef, Fraction(0, 1));
      clef->setParent(seg);
      undoAddElement(clef);
      clef->layout();

      undoChangeKeySig(ns, Fraction(0, 1), st->keySigEvent(Fraction(0, 1)));

      masterScore()->rebuildMidiMapping();
      cmdState()._instrumentsChanged = true;
      doLayout();

      //
      // move notes
      //
      select(0, SelectType::SINGLE, 0);
      int strack = staffIdx * VOICES;
      int dtrack = (staffIdx + 1) * VOICES;

      for (Segment* s = firstSegment(SegmentType::ChordRest); s; s = s->next1(SegmentType::ChordRest)) {
            for (int voice = 0; voice < VOICES; ++voice) {
                  Element* e = s->element(strack + voice);
                  if (!(e && e->isChord()))
                        continue;
                  Chord* c = toChord(e);
                  QList<Note*> removeNotes;
                  foreach(Note* note, c->notes()) {
                        if (note->pitch() >= splitPoint)
                              continue;
                        Chord* chord = toChord(s->element(dtrack + voice));
                        Q_ASSERT(!chord || (chord->isChord()));
                        if (chord == 0) {
                              chord = new Chord(*c);
                              qDeleteAll(chord->notes());
                              chord->notes().clear();
                              chord->setTrack(dtrack + voice);
                              undoAddElement(chord);
                              }
                        Note* nnote = new Note(*note);
                        nnote->setTrack(dtrack + voice);
                        chord->add(nnote);
                        nnote->updateLine();
                        removeNotes.append(note);
                        }
                  c->sortNotes();
                  for (Note* note : removeNotes) {
                        undoRemoveElement(note);
                        Chord* chord = note->chord();
                        if (chord->notes().empty()) {
                              for (auto sp : spanner()) {
                                    Slur* slur = toSlur(sp.second);
                                    if (slur->type() != ElementType::SLUR)
                                          continue;
                                    if (slur->startCR() == chord) {
                                          slur->undoChangeProperty(Pid::TRACK, slur->track()+VOICES);
                                          for (ScoreElement* ee : slur->linkList()) {
                                                Slur* lslur = toSlur(ee);
                                                lslur->setStartElement(0);
                                                }
                                          }
                                    if (slur->endCR() == chord) {
                                          slur->undoChangeProperty(Pid::SPANNER_TRACK2, slur->track2()+VOICES);
                                          for (ScoreElement* ee : slur->linkList()) {
                                                Slur* lslur = toSlur(ee);
                                                lslur->setEndElement(0);
                                                }
                                          }
                                    }
                              undoRemoveElement(chord);
                              }
                        }
                  }
            }
      //
      // make sure that the timeline for dtrack
      // has no gaps
      //
      Fraction ctick  = Fraction(0,1);
      for (Measure* m = firstMeasure(); m; m = m->nextMeasure()) {
            for (Segment* s = m->first(SegmentType::ChordRest); s; s = s->next1(SegmentType::ChordRest)) {
                  ChordRest* cr = toChordRest(s->element(dtrack));
                  if (cr == 0)
                        continue;
                  Fraction rest = s->tick() - ctick;
                  if (rest.isNotZero()) {
                        // insert Rest
                        Segment* s1 = tick2segment(ctick);
                        if (s1 == 0) {
                              qDebug("no segment at %d", ctick.ticks());
                              continue;
                              }
                        setRest(ctick, dtrack, rest, false, 0);
                        }
                  ctick = s->tick() + cr->actualTicks();
                  }
            Fraction rest = m->tick() + m->ticks() - ctick;
            if (rest.isNotZero()) {
                  setRest(ctick, dtrack, rest, false, 0);
                  ctick += rest;
                  }
            }
      //
      // same for strack
      //
      ctick  = Fraction(0,1);
      for (Measure* m = firstMeasure(); m; m = m->nextMeasure()) {
            for (Segment* s = m->first(SegmentType::ChordRest); s; s = s->next1(SegmentType::ChordRest)) {
                  ChordRest* cr = toChordRest(s->element(strack));
                  if (cr == 0)
                        continue;
                  Fraction rest = s->tick() - ctick;
                  if (rest.isNotZero()) {
                        // insert Rest
                        Segment* s1 = tick2segment(ctick);
                        if (s1 == 0) {
                              qDebug("no segment at %d", ctick.ticks());
                              continue;
                              }
                        setRest(ctick, strack, rest, false, 0);
                        }
                  ctick = s->tick() + cr->actualTicks();
                  }
            Fraction rest = m->tick() + m->ticks() - ctick;
            if (rest.isNotZero()) {
                  setRest(ctick, strack, rest, false, 0);
                  ctick += rest;
                  }
            }
      }

//---------------------------------------------------------
//   cmdRemovePart
//---------------------------------------------------------

void Score::cmdRemovePart(Part* part)
      {
      int sidx   = staffIdx(part);
      int n      = part->nstaves();

      for (int i = 0; i < n; ++i)
            cmdRemoveStaff(sidx);

      undoRemovePart(part, sidx);
      }

//---------------------------------------------------------
//   insertPart
//---------------------------------------------------------

void Score::insertPart(Part* part, int idx)
      {
      bool inserted = false;
      int staff = 0;
      for (QList<Part*>::iterator i = _parts.begin(); i != _parts.end(); ++i) {
            if (staff >= idx) {
                  _parts.insert(i, part);
                  inserted = true;
                  break;
                  }
            staff += (*i)->nstaves();
            }
      if (!inserted)
            _parts.push_back(part);
      masterScore()->rebuildMidiMapping();
      setInstrumentsChanged(true);
      }

//---------------------------------------------------------
//   removePart
//---------------------------------------------------------

void Score::removePart(Part* part)
      {
      _parts.removeAt(_parts.indexOf(part));
      masterScore()->rebuildMidiMapping();
      setInstrumentsChanged(true);
      }

//---------------------------------------------------------
//   insertStaff
//---------------------------------------------------------

void Score::insertStaff(Staff* staff, int ridx)
      {
      staff->part()->insertStaff(staff, ridx);

      int idx = staffIdx(staff->part()) + ridx;
      _staves.insert(idx, staff);

      for (auto i = staff->score()->spanner().cbegin(); i != staff->score()->spanner().cend(); ++i) {
            Spanner* s = i->second;
            if (s->systemFlag())
                  continue;
            if (s->staffIdx() >= idx) {
                  int t = s->track() + VOICES;
                  if (t >= ntracks())
                        t = ntracks() - 1;
                  s->setTrack(t);
                  for (SpannerSegment* ss : s->spannerSegments())
                        ss->setTrack(t);
                  if (s->track2() != -1) {
                        t = s->track2() + VOICES;
                        s->setTrack2(t < ntracks() ? t : s->track());
                        }
                  }
            }
#if 0
      for (Spanner* s : staff->score()->unmanagedSpanners()) {
            if (s->systemFlag())
                  continue;
            if (s->staffIdx() >= idx) {
                  int t = s->track() + VOICES;
                  s->setTrack(t < ntracks() ? t : ntracks() - 1);
                  if (s->track2() != -1) {
                        t = s->track2() + VOICES;
                        s->setTrack2(t < ntracks() ? t : s->track());
                        }
                  }
            }
#endif
      }

//---------------------------------------------------------
//   removeStaff
//---------------------------------------------------------

void Score::removeStaff(Staff* staff)
      {
      int idx = staff->idx();
      for (auto i = staff->score()->spanner().cbegin(); i != staff->score()->spanner().cend(); ++i) {
            Spanner* s = i->second;
            if (s->staffIdx() > idx) {
                  int t = s->track() - VOICES;
                  if (t < 0)
                        t = 0;
                  s->setTrack(t);
                  for (SpannerSegment* ss : s->spannerSegments())
                        ss->setTrack(t);
                  if (s->track2() != -1) {
                        t = s->track2() - VOICES;
                        s->setTrack2(t >= 0 ? t : s->track());
                        }
                  }
            }
#if 0
      for (Spanner* s : staff->score()->unmanagedSpanners()) {
            if (s->staffIdx() > idx) {
                  int t = s->track() - VOICES;
                  s->setTrack(t >= 0 ? t : 0);
                  if (s->track2() != -1) {
                        t = s->track2() - VOICES;
                        s->setTrack2(t >= 0 ? t : s->track());
                        }
                  }
            }
#endif
      _staves.removeAll(staff);
      staff->part()->removeStaff(staff);
      }

//---------------------------------------------------------
//   adjustBracketsDel
//---------------------------------------------------------

void Score::adjustBracketsDel(int sidx, int eidx)
      {
      for (int staffIdx = 0; staffIdx < _staves.size(); ++staffIdx) {
            Staff* staff = _staves[staffIdx];
            for (BracketItem* bi : staff->brackets()) {
                  int span = bi->bracketSpan();
                  if ((span == 0) || ((staffIdx + span) < sidx) || (staffIdx > eidx))
                        continue;
                  if ((sidx >= staffIdx) && (eidx <= (staffIdx + span)))
                        bi->undoChangeProperty(Pid::BRACKET_SPAN, span - (eidx-sidx));
                  }
#if 0 // TODO
            int span = staff->barLineSpan();
            if ((sidx >= staffIdx) && (eidx <= (staffIdx + span))) {
                  int newSpan = span - (eidx-sidx) + 1;
                  int lastSpannedStaffIdx = staffIdx + newSpan - 1;
                  int tick = 0;
                  undoChangeBarLineSpan(staff, newSpan, 0, (_staves[lastSpannedStaffIdx]->lines(0)-1)*2);
                  }
#endif
            }
      }

//---------------------------------------------------------
//   adjustBracketsIns
//---------------------------------------------------------

void Score::adjustBracketsIns(int sidx, int eidx)
      {
      for (int staffIdx = 0; staffIdx < _staves.size(); ++staffIdx) {
            Staff* staff = _staves[staffIdx];
            for (BracketItem* bi : staff->brackets()) {
                  int span = bi->bracketSpan();
                  if ((span == 0) || ((staffIdx + span) < sidx) || (staffIdx > eidx))
                        continue;
                  if ((sidx >= staffIdx) && (eidx < (staffIdx + span)))
                        bi->undoChangeProperty(Pid::BRACKET_SPAN, span + (eidx-sidx));
                  }
#if 0 // TODO
            int span = staff->barLineSpan();
            if ((sidx >= staffIdx) && (eidx < (staffIdx + span))) {
                  int idx = staffIdx + span - 1;
                  if (idx >= _staves.size())
                        idx = _staves.size() - 1;
                  undoChangeBarLineSpan(staff, span, 0, (_staves[idx]->lines()-1)*2);
                  }
#endif
            }
      }

//---------------------------------------------------------
//   adjustKeySigs
//---------------------------------------------------------

void Score::adjustKeySigs(int sidx, int eidx, KeyList km)
      {
      for (int staffIdx = sidx; staffIdx < eidx; ++staffIdx) {
            Staff* staff = _staves[staffIdx];
            for (auto i = km.begin(); i != km.end(); ++i) {
                  Fraction tick = Fraction::fromTicks(i->first);
                  Measure* measure = tick2measure(tick);
                  if (!measure)
                        continue;
                  if (staff->isDrumStaff(tick))
                        continue;
                  KeySigEvent oKey = i->second;
                  KeySigEvent nKey = oKey;
                  int diff = -staff->part()->instrument(tick)->transpose().chromatic;
                  if (diff != 0 && !styleB(Sid::concertPitch) && !oKey.custom() && !oKey.isAtonal())
                        nKey.setKey(transposeKey(nKey.key(), diff));
                  staff->setKey(tick, nKey);
                  KeySig* keysig = new KeySig(this);
                  keysig->setTrack(staffIdx * VOICES);
                  keysig->setKeySigEvent(nKey);
                  Segment* s = measure->getSegment(SegmentType::KeySig, tick);
                  s->add(keysig);
                  }
            }
      }

//---------------------------------------------------------
//   cmdRemoveStaff
//---------------------------------------------------------

void Score::cmdRemoveStaff(int staffIdx)
      {
      Staff* s = staff(staffIdx);
      adjustBracketsDel(staffIdx, staffIdx+1);

      undoRemoveStaff(s);

      // remove linked staff and measures in linked staves in excerpts
      // unlink staff in the same score

      if (s->links()) {
            Staff* sameScoreLinkedStaff = 0;
            auto staves = s->links();
            for (auto le : *staves) {
                  Staff* staff = toStaff(le);
                  if (staff == s)
                        continue;
                  Score* lscore = staff->score();
                  if (lscore != this) {
                        lscore->undoRemoveStaff(staff);
                        s->score()->undo(new Unlink(staff));
                        if (staff->part()->nstaves() == 0) {
                              int pIndex    = lscore->staffIdx(staff->part());
                              lscore->undoRemovePart(staff->part(), pIndex);
                              }
                        }
                  else // linked staff in the same score
                       sameScoreLinkedStaff = staff;
                  }
            if (sameScoreLinkedStaff)
//                  s->score()->undo(new Unlink(sameScoreLinkedStaff)); // once should be enough
                  s->score()->undo(new Unlink(s)); // once should be enough
            }
      }

//---------------------------------------------------------
//   sortStaves
//---------------------------------------------------------

void Score::sortStaves(QList<int>& dst)
      {
      qDeleteAll(systems());
      systems().clear();  //??
      _parts.clear();
      Part* curPart = 0;
      QList<Staff*> dl;
      foreach (int idx, dst) {
            Staff* staff = _staves[idx];
            if (staff->part() != curPart) {
                  curPart = staff->part();
                  curPart->staves()->clear();
                  _parts.push_back(curPart);
                  }
            curPart->staves()->push_back(staff);
            dl.push_back(staff);
            }
      _staves = dl;

      for (Measure* m = firstMeasure(); m; m = m->nextMeasure()) {
            m->sortStaves(dst);
            if (m->hasMMRest())
                  m->mmRest()->sortStaves(dst);
            }
      for (auto i : _spanner.map()) {
            Spanner* sp = i.second;
            if (sp->systemFlag())
                  continue;
            int voice    = sp->voice();
            int staffIdx = sp->staffIdx();
            int idx = dst.indexOf(staffIdx);
            if (idx >=0) {
                  sp->setTrack(idx * VOICES + voice);
                  if (sp->track2() != -1)
                        sp->setTrack2(idx * VOICES +(sp->track2() % VOICES)); // at least keep the voice...
                  }
            }
      setLayoutAll();
      }

//---------------------------------------------------------
//   cmdConcertPitchChanged
//---------------------------------------------------------

void Score::cmdConcertPitchChanged(bool flag, bool /*useDoubleSharpsFlats*/)
      {
      undoChangeStyleVal(Sid::concertPitch, flag);       // change style flag

      for (Staff* staff : _staves) {
            if (staff->staffType(Fraction(0,1))->group() == StaffGroup::PERCUSSION)       // TODO
                  continue;
            // if this staff has no transposition, and no instrument changes, we can skip it
            Interval interval = staff->part()->instrument()->transpose();
            if (interval.isZero() && staff->part()->instruments()->size() == 1)
                  continue;
            if (!flag)
                  interval.flip();

            int staffIdx   = staff->idx();
            int startTrack = staffIdx * VOICES;
            int endTrack   = startTrack + VOICES;

            transposeKeys(staffIdx, staffIdx + 1, Fraction(0,1), lastSegment()->tick(), interval, true, !flag);

            for (Segment* segment = firstSegment(SegmentType::ChordRest); segment; segment = segment->next1(SegmentType::ChordRest)) {
                  interval = staff->part()->instrument(segment->tick())->transpose();
                  if (!flag)
                        interval.flip();
                  for (Element* e : segment->annotations()) {
                        if (!e->isHarmony() || (e->track() < startTrack) || (e->track() >= endTrack))
                              continue;
                        Harmony* h  = toHarmony(e);
                        int rootTpc = transposeTpc(h->rootTpc(), interval, true);
                        int baseTpc = transposeTpc(h->baseTpc(), interval, true);
                        for (ScoreElement* se : h->linkList()) {
                              // don't transpose all links
                              // just ones resulting from mmrests
                              Harmony* he = toHarmony(se);    // toHarmony() does not work as e is an ScoreElement
                              if (he->staff() == h->staff())
                                    undoTransposeHarmony(he, rootTpc, baseTpc);
                              }
                        }
                  }
            }
      }

//---------------------------------------------------------
//   addAudioTrack
//---------------------------------------------------------

void Score::addAudioTrack()
      {
      // TODO
      }

//---------------------------------------------------------
//   padToggle
//---------------------------------------------------------

void Score::padToggle(Pad n, const EditData& ed)
      {
      int oldDots = _is.duration().dots();
      switch (n) {
            case Pad::NOTE00:
                  _is.setDuration(TDuration::DurationType::V_LONG);
                  break;
            case Pad::NOTE0:
                  _is.setDuration(TDuration::DurationType::V_BREVE);
                  break;
            case Pad::NOTE1:
                  _is.setDuration(TDuration::DurationType::V_WHOLE);
                  break;
            case Pad::NOTE2:
                  _is.setDuration(TDuration::DurationType::V_HALF);
                  break;
            case Pad::NOTE4:
                  _is.setDuration(TDuration::DurationType::V_QUARTER);
                  break;
            case Pad::NOTE8:
                  _is.setDuration(TDuration::DurationType::V_EIGHTH);
                  break;
            case Pad::NOTE16:
                  _is.setDuration(TDuration::DurationType::V_16TH);
                  break;
            case Pad::NOTE32:
                  _is.setDuration(TDuration::DurationType::V_32ND);
                  break;
            case Pad::NOTE64:
                  _is.setDuration(TDuration::DurationType::V_64TH);
                  break;
            case Pad::NOTE128:
                  _is.setDuration(TDuration::DurationType::V_128TH);
                  break;
            case Pad::REST:
                  if (noteEntryMode()) {
                        _is.setRest(!_is.rest());
                        _is.setAccidentalType(AccidentalType::NONE);
                        }
                  else if (selection().isNone()) {
                        ed.view->startNoteEntryMode();
                        _is.setDuration(TDuration::DurationType::V_QUARTER);
                        _is.setRest(true);
                        }
                  else {
                        for (ChordRest* cr : getSelectedChordRests()) {
                              if (!cr->isRest())
                                    setNoteRest(cr->segment(), cr->track(), NoteVal(), cr->durationTypeTicks());
                              }
                        }
                  break;
            case Pad::DOT:
                  if ((_is.duration().dots() == 1) || (_is.duration() == TDuration::DurationType::V_1024TH))
                        _is.setDots(0);
                  else
                        _is.setDots(1);
                  break;
            case Pad::DOTDOT:
                  if ((_is.duration().dots() == 2)
                     || (_is.duration() == TDuration::DurationType::V_512TH)
                     || (_is.duration() == TDuration::DurationType::V_1024TH))
                        _is.setDots(0);
                  else
                        _is.setDots(2);
                  break;
            case Pad::DOT3:
                  if ((_is.duration().dots() == 3)
                     || (_is.duration() == TDuration::DurationType::V_256TH)
                     || (_is.duration() == TDuration::DurationType::V_512TH)
                     || (_is.duration() == TDuration::DurationType::V_1024TH))
                        _is.setDots(0);
                  else
                        _is.setDots(3);
                  break;
            case Pad::DOT4:
                  if ((_is.duration().dots() == 4)
                     || (_is.duration() == TDuration::DurationType::V_128TH)
                     || (_is.duration() == TDuration::DurationType::V_256TH)
                     || (_is.duration() == TDuration::DurationType::V_512TH)
                     || (_is.duration() == TDuration::DurationType::V_1024TH))
                        _is.setDots(0);
                  else
                        _is.setDots(4);
                  break;
            }
      if (n >= Pad::NOTE00 && n <= Pad::NOTE128) {
            _is.setDots(0);
            //
            // if in "note enter" mode, reset
            // rest flag
            //
            if (noteEntryMode()) {
                  if (usingNoteEntryMethod(NoteEntryMethod::RHYTHM)) {
                        switch (oldDots) {
                              case 1:
                                    padToggle(Pad::DOT, ed);
                                    break;
                              case 2:
                                    padToggle(Pad::DOTDOT, ed);
                                    break;
                              }
                        NoteVal nval;
                        if (_is.rest()) {
                              // Enter a rest
                              nval = NoteVal();
                              }
                        else {
                              // Enter a note on the middle staff line
                              Staff* s = staff(_is.track() / VOICES);
                              Fraction tick = _is.tick();
                              ClefType clef = s->clef(tick);
                              Key key = s->key(tick);
                              nval = NoteVal(line2pitch(4, clef, key));
                              }
                        setNoteRest(_is.segment(), _is.track(), nval, _is.duration().fraction());
                        _is.moveToNextInputPos();
                        }
                  else
                        _is.setRest(false);
                  }
            }

      if (noteEntryMode())
            return;

      std::vector<ChordRest*> crs;

      if (selection().isSingle()) {
            Element* e = selection().element();
            ChordRest* cr = InputState::chordRest(e);

            // do not allow to add a dot on a full measure rest
            if (cr && cr->isRest()) {
                  Rest* r = toRest(cr);
                  if (r->isFullMeasureRest())
                        _is.setDots(0);
                  }

            // on measure rest, select the first actual rest
            if (cr && cr->isRest() && cr->measure()->isMMRest()) {
                  Measure* m = cr->measure()->mmRestFirst();
                  if (m)
                        cr = m->findChordRest(m->tick(), 0);
                  }

            if (cr) {
                  crs.push_back(cr);
                  }
            else {
                  ed.view->startNoteEntryMode();
                  deselect(e);
                  }
            }
      else if (selection().isNone() && n != Pad::REST) {
            TDuration td = _is.duration();
            ed.view->startNoteEntryMode();
            _is.setDuration(td);
            _is.setAccidentalType(AccidentalType::NONE);
            }
      else {
            const auto elements = selection().uniqueElements();
            bool canAdjustLength = true;
            for (Element* e : elements) {
                  ChordRest* cr = InputState::chordRest(e);
                  if (!cr)
                        continue;
                  if (cr->isRepeatMeasure() || (cr->isRest() && toRest(cr)->measure() && toRest(cr)->measure()->isMMRest())) {
                        canAdjustLength = false;
                        break;
                        }
                  crs.push_back(cr);
                  }

            if (canAdjustLength) {
                  // Change length from last to first chord/rest
                  std::sort(crs.begin(), crs.end(), [](const ChordRest* cr1, const ChordRest* cr2) {
                        if (cr2->track() == cr1->track())
                              return cr2->isBefore(cr1);
                        return cr2->track() < cr1->track();
                        });
                  // Remove duplicates from the list
                  crs.erase(std::unique(crs.begin(), crs.end()), crs.end());
                  }
            else
                  crs.clear();
            }

      for (ChordRest* cr : crs) {
            if (cr->isChord() && (toChord(cr)->isGrace())) {
                  //
                  // handle appoggiatura and acciaccatura
                  //
                  undoChangeChordRestLen(cr, _is.duration());
                  }
            else
                  changeCRlen(cr, _is.duration());
            }
      }

//---------------------------------------------------------
//   deselect
//---------------------------------------------------------

void Score::deselect(Element* el)
      {
      addRefresh(el->abbox());
      _selection.remove(el);
      setSelectionChanged(true);
      _selection.update();
      }

//---------------------------------------------------------
//   select
//    staffIdx is valid, if element is of type MEASURE
//---------------------------------------------------------

void Score::select(Element* e, SelectType type, int staffIdx)
      {
      if (e && (e->isNote() || e->isRest())) {
            Element* ee = e;
            if (ee->isNote())
                  ee = ee->parent();
            Fraction tick = toChordRest(ee)->segment()->tick();
            if (masterScore()->playPos() != tick)
                  masterScore()->setPlayPos(tick);
            }
      if (MScore::debugMode)
            qDebug("select element <%s> type %d(state %d) staff %d",
               e ? e->name() : "", int(type), int(selection().state()), e ? e->staffIdx() : -1);

      switch (type) {
            case SelectType::SINGLE:
                  selectSingle(e, staffIdx);
                  break;
            case SelectType::ADD:
                  selectAdd(e);
                  break;
            case SelectType::RANGE:
                  selectRange(e, staffIdx);
                  break;
            }
      setSelectionChanged(true);
      }

//---------------------------------------------------------
//   selectSingle
//    staffIdx is valid, if element is of type MEASURE
//---------------------------------------------------------

void Score::selectSingle(Element* e, int staffIdx)
      {
      SelState selState = _selection.state();
      deselectAll();
      if (e == 0) {
            selState = SelState::NONE;
            setUpdateAll();
            }
      else {
            if (e->isMeasure()) {
                  select(e, SelectType::RANGE, staffIdx);
                  return;
                  }
            addRefresh(e->abbox());
            _selection.add(e);
            _is.setTrack(e->track());
            selState = SelState::LIST;
            if (e->type() == ElementType::NOTE) {
                  e = e->parent();
                  }
            if (e->isChordRest()) {
                  _is.setLastSegment(_is.segment());
                  _is.setSegment(toChordRest(e)->segment());
                  }
            }
      _selection.setActiveSegment(0);
      _selection.setActiveTrack(0);

      _selection.setState(selState);
      }

//---------------------------------------------------------
//   switchToPageMode
//---------------------------------------------------------

void Score::switchToPageMode()
      {
            if (_layoutMode != LayoutMode::PAGE) {
                  setLayoutMode(LayoutMode::PAGE);
                  doLayout();
            }
      }

//---------------------------------------------------------
//   selectAdd
//---------------------------------------------------------

void Score::selectAdd(Element* e)
      {
      SelState selState = _selection.state();

      if (_selection.isRange()) {
            select(0, SelectType::SINGLE, 0);
            return;
            }

      if (e->isMeasure()) {
            Measure* m = toMeasure(e);
            Fraction tick  = m->tick();
            if (_selection.isNone()) {
                  _selection.setRange(m->tick2segment(tick),
                                      m == lastMeasure() ? 0 : m->last(),
                                      0,
                                      nstaves());
                  setUpdateAll();
                  selState = SelState::RANGE;
                  _selection.updateSelectedElements();
                  }
            }
      else if (!_selection.elements().contains(e)) {
            addRefresh(e->abbox());
            selState = SelState::LIST;
            _selection.add(e);
            }

      _selection.setState(selState);
      }

//---------------------------------------------------------
//   selectRange
//    staffIdx is valid, if element is of type MEASURE
//---------------------------------------------------------

void Score::selectRange(Element* e, int staffIdx)
      {
      int activeTrack = e->track();
      // current selection is range extending to end of score?
      bool endRangeSelected = selection().isRange() && selection().endSegment() == nullptr;
      if (e->isMeasure()) {
            Measure* m  = toMeasure(e);
            Fraction tick    = m->tick();
            Fraction etick   = tick + m->ticks();
            activeTrack = staffIdx * VOICES;
            Segment* s1 = m->tick2segment(tick);
            if (!s1)                      // m is corrupted!
                  s1 = m->first(SegmentType::ChordRest);
            Segment* s2 = m == lastMeasure() ? 0 : m->last();
            if (_selection.isNone() || (_selection.isList() && !_selection.isSingle())) {
                  if (_selection.isList())
                        deselectAll();
                  _selection.setRange(s1, s2, staffIdx, staffIdx + 1);
                  }
            else if (_selection.isRange())
                  _selection.extendRangeSelection(s1, s2, staffIdx, tick, etick);
            else if (_selection.isSingle()) {
                  Element* oe = selection().element();
                  if (oe->isNote() || oe->isChordRest()) {
                        if (oe->isNote())
                              oe = oe->parent();
                        ChordRest* cr = toChordRest(oe);
                        Fraction oetick = cr->segment()->tick();
                        Segment* startSegment = cr->segment();
                        Segment* endSegment = m->last();
                        if (tick < oetick) {
                              startSegment = m->tick2segment(tick);
                              if (etick <= oetick) {
                                    SegmentType st = SegmentType::ChordRest | SegmentType::EndBarLine | SegmentType::Clef;
                                    endSegment = cr->nextSegmentAfterCR(st);
                                    }
                              }
                        int staffStart = staffIdx;
                        int endStaff = staffIdx + 1;
                        if (staffStart > cr->staffIdx())
                              staffStart = cr->staffIdx();
                        else if (cr->staffIdx() >= endStaff)
                              endStaff = cr->staffIdx() + 1;
                        _selection.setRange(startSegment, endSegment, staffStart, endStaff);
                        }
                  else {
                        deselectAll();
                        _selection.setRange(s1, s2, staffIdx, staffIdx + 1);
                        }
                  }
            else {
                  qDebug("SELECT_RANGE: measure: sel state %d", int(_selection.state()));
                  return;
                  }
            }
      else if (e->isNote() || e->isChordRest()) {
            if (e->isNote())
                  e = e->parent();
            ChordRest* cr = toChordRest(e);

            if (_selection.isNone() || (_selection.isList() && !_selection.isSingle())) {
                  if (_selection.isList())
                        deselectAll();
                  SegmentType st = SegmentType::ChordRest | SegmentType::EndBarLine | SegmentType::Clef;
                  _selection.setRange(cr->segment(), cr->nextSegmentAfterCR(st), e->staffIdx(), e->staffIdx() + 1);
                  activeTrack = cr->track();
                  }
            else if (_selection.isSingle()) {
                  Element* oe = _selection.element();
                  if (oe && (oe->isNote() || oe->isRest())) {
                        if (oe->isNote())
                              oe = oe->parent();
                        ChordRest* ocr = toChordRest(oe);

                        Segment* endSeg = tick2segmentMM(ocr->segment()->tick() + ocr->actualTicks());
                        if (!endSeg)
                              endSeg = ocr->segment()->next();

                        _selection.setRange(ocr->segment(), endSeg, oe->staffIdx(), oe->staffIdx() + 1);
                        _selection.extendRangeSelection(cr);
                        }
                  else {
                        select(e, SelectType::SINGLE, 0);
                        return;
                        }
                  }
            else if (_selection.isRange()) {
                  _selection.extendRangeSelection(cr);
                  }
            else {
                  qDebug("sel state %d", int(_selection.state()));
                  return;
                  }
            if (!endRangeSelected && !_selection.endSegment())
                  _selection.setEndSegment(cr->segment()->nextCR());
            if (!_selection.startSegment())
                  _selection.setStartSegment(cr->segment());
            }
      else {
            select(e, SelectType::SINGLE, staffIdx);
            return;
            }

      _selection.setActiveTrack(activeTrack);

      // doing this in note entry mode can clear selection
      if (_selection.startSegment() && !noteEntryMode()) {
            Fraction tick = _selection.startSegment()->tick();
            if (masterScore()->playPos() != tick)
                  masterScore()->setPlayPos(tick);
            }

      _selection.updateSelectedElements();
      }

//---------------------------------------------------------
//   collectMatch
//---------------------------------------------------------

void Score::collectMatch(void* data, Element* e)
      {
      ElementPattern* p = static_cast<ElementPattern*>(data);
      if (p->type != int(e->type()))
            return;

      if (p->type == int(ElementType::NOTE)) {
            if (p->subtype < 0) {
                  if (!(toNote(e)->chord()->isGrace()))
                        return;
                  }
            else if ((toNote(e)->chord()->isGrace()) || (p->subtype != e->subtype()))
                  return;
            }
      else if (p->subtypeValid && p->subtype != e->subtype())
            return;

      if ((p->staffStart != -1)
         && ((p->staffStart > e->staffIdx()) || (p->staffEnd <= e->staffIdx())))
            return;

      if (p->voice != -1 && p->voice != e->voice())
            return;

      if (p->system) {
            Element* ee = e;
            do {
                  if (ee->type() == ElementType::SYSTEM) {
                        if (p->system != ee)
                              return;
                        break;
                        }
                  ee = ee->parent();
                  } while (ee);
            }

      if (e->isRest() && p->durationTicks != Fraction(-1,1)) {
            const Rest* r = toRest(e);
            if (p->durationTicks != r->actualTicks())
                  return;
            }

      p->el.append(e);
      }

//---------------------------------------------------------
//   collectNoteMatch
//---------------------------------------------------------

void Score::collectNoteMatch(void* data, Element* e)
      {
      NotePattern* p = static_cast<NotePattern*>(data);
      if (!e->isNote())
            return;
      Note* n = toNote(e);
      if (p->type != NoteType::INVALID && p->type != n->noteType())
            return;
      if (p->pitch != -1 && p->pitch != n->pitch())
            return;
      if (p->string != STRING_NONE && p->string != n->string())
            return;
      if (p->tpc != Tpc::TPC_INVALID && p->tpc != n->tpc())
            return;
      if (p->notehead != NoteHead::Group::HEAD_INVALID && p->notehead != n->headGroup())
            return;
      if (p->durationType.type() != TDuration::DurationType::V_INVALID && p->durationType != n->chord()->actualDurationType())
            return;
      if (p->durationTicks != Fraction(-1,1) && p->durationTicks != n->chord()->actualTicks())
            return;
      if ((p->staffStart != -1)
         && ((p->staffStart > e->staffIdx()) || (p->staffEnd <= e->staffIdx())))
            return;
      if (p->voice != -1 && p->voice != e->voice())
            return;
      if (p->system && (p->system != n->chord()->segment()->system()))
            return;
      p->el.append(n);
      }


//---------------------------------------------------------
//   selectSimilar
//---------------------------------------------------------

void Score::selectSimilar(Element* e, bool sameStaff)
      {
      ElementType type = e->type();
      Score* score = e->score();

      ElementPattern pattern;
      pattern.type = int(type);
      pattern.subtype = 0;
      pattern.subtypeValid = false;
      if (type == ElementType::NOTE) {
            if (toNote(e)->chord()->isGrace())
                  pattern.subtype = -1; // hack
            else
                  pattern.subtype = e->subtype();
            }
      pattern.staffStart = sameStaff ? e->staffIdx() : -1;
      pattern.staffEnd = sameStaff ? e->staffIdx() + 1 : -1;
      pattern.voice   = -1;
      pattern.system  = 0;
      pattern.durationTicks = Fraction(-1,1);

      score->scanElements(&pattern, collectMatch);

      score->select(0, SelectType::SINGLE, 0);
      for (Element* ee : pattern.el)
            score->select(ee, SelectType::ADD, 0);
      }

//---------------------------------------------------------
//   selectSimilarInRange
//---------------------------------------------------------

void Score::selectSimilarInRange(Element* e)
      {
      ElementType type = e->type();
      Score* score = e->score();

      ElementPattern pattern;
      pattern.type    = int(type);
      pattern.subtype = 0;
      pattern.subtypeValid = false;
      if (type == ElementType::NOTE) {
            if (toNote(e)->chord()->isGrace())
                  pattern.subtype = -1; //hack
            else
                  pattern.subtype = e->subtype();
            pattern.subtypeValid = true;
            }
      pattern.staffStart = selection().staffStart();
      pattern.staffEnd = selection().staffEnd();
      pattern.voice   = -1;
      pattern.system  = 0;
      pattern.durationTicks = Fraction(-1,1);

      score->scanElementsInRange(&pattern, collectMatch);

      score->select(0, SelectType::SINGLE, 0);
      for (Element* ee : pattern.el)
            score->select(ee, SelectType::ADD, 0);
      }

//---------------------------------------------------------
//   lassoSelect
//---------------------------------------------------------

void Score::lassoSelect(const QRectF& bbox)
      {
      select(0, SelectType::SINGLE, 0);
      QRectF fr(bbox.normalized());
      foreach(Page* page, pages()) {
            QRectF pr(page->bbox());
            QRectF frr(fr.translated(-page->pos()));
            if (pr.right() < frr.left())
                  continue;
            if (pr.left() > frr.right())
                  break;

            QList<Element*> el = page->items(frr);
            for (int i = 0; i < el.size(); ++i) {
                  Element* e = el.at(i);
                  if (frr.contains(e->abbox())) {
                        if (e->type() != ElementType::MEASURE && e->selectable())
                              select(e, SelectType::ADD, 0);
                        }
                  }
            }
      }

//---------------------------------------------------------
//   lassoSelectEnd
//---------------------------------------------------------

void Score::lassoSelectEnd()
      {
      int noteRestCount     = 0;
      Segment* startSegment = 0;
      Segment* endSegment   = 0;
      int startStaff        = 0x7fffffff;
      int endStaff          = 0;
      const ChordRest* endCR = 0;

      if (_selection.elements().empty()) {
            _selection.setState(SelState::NONE);
            setUpdateAll();
            return;
            }
      _selection.setState(SelState::LIST);

      foreach(const Element* e, _selection.elements()) {
            if (e->type() != ElementType::NOTE && e->type() != ElementType::REST)
                  continue;
            ++noteRestCount;
            if (e->type() == ElementType::NOTE)
                  e = e->parent();
            Segment* seg = static_cast<const ChordRest*>(e)->segment();
            if ((startSegment == 0) || (*seg < *startSegment))
                  startSegment = seg;
            if ((endSegment == 0) || (*seg > *endSegment)) {
                  endSegment = seg;
                  endCR = static_cast<const ChordRest*>(e);
                  }
            int idx = e->staffIdx();
            if (idx < startStaff)
                  startStaff = idx;
            if (idx > endStaff)
                  endStaff = idx;
            }
      if (noteRestCount > 0) {
            endSegment = endCR->nextSegmentAfterCR(SegmentType::ChordRest
               | SegmentType::EndBarLine
               | SegmentType::Clef);
            _selection.setRange(startSegment, endSegment, startStaff, endStaff+1);
            if (!_selection.isRange())
                  _selection.setState(SelState::RANGE);
            _selection.updateSelectedElements();
            }
      setUpdateAll();
      }

//---------------------------------------------------------
//   addLyrics
//---------------------------------------------------------

void Score::addLyrics(const Fraction& tick, int staffIdx, const QString& txt)
      {
      if (txt.trimmed().isEmpty())
            return;
      Measure* measure = tick2measure(tick);
      Segment* seg     = measure->findSegment(SegmentType::ChordRest, tick);
      if (seg == 0) {
            qDebug("no segment found for lyrics<%s> at tick %d",
               qPrintable(txt), tick.ticks());
            return;
            }

      bool lyricsAdded = false;
      for (int voice = 0; voice < VOICES; ++voice) {
            int track = staffIdx * VOICES + voice;
            ChordRest* cr = toChordRest(seg->element(track));
            if (cr) {
                  Lyrics* l = new Lyrics(this);
                  l->setXmlText(txt);
                  l->setTrack(track);
                  cr->add(l);
                  lyricsAdded = true;
                  break;
                  }
            }
      if (!lyricsAdded) {
            qDebug("no chord/rest for lyrics<%s> at tick %d, staff %d",
               qPrintable(txt), tick.ticks(), staffIdx);
            }
      }

//---------------------------------------------------------
//   setTempo
//    convenience function to access TempoMap
//---------------------------------------------------------

void Score::setTempo(Segment* segment, qreal tempo)
      {
      setTempo(segment->tick(), tempo);
      }

void Score::setTempo(const Fraction& tick, qreal tempo)
      {
      tempomap()->setTempo(tick.ticks(), tempo);
      setPlaylistDirty();
      }

//---------------------------------------------------------
//   removeTempo
//---------------------------------------------------------

void Score::removeTempo(const Fraction& tick)
      {
      tempomap()->delTempo(tick.ticks());
      setPlaylistDirty();
      }

//---------------------------------------------------------
//   resetTempo
//---------------------------------------------------------

void Score::resetTempo()
      {
      resetTempoRange(Fraction(0,1), Fraction(std::numeric_limits<int>::max(), 1));
      }

//---------------------------------------------------------
//   resetTempoRange
//    Reset tempo and timesig maps in the given range.
//    Start tick included, end tick excluded.
//---------------------------------------------------------

void Score::resetTempoRange(const Fraction& tick1, const Fraction& tick2)
      {
      const bool zeroInRange = (tick1 <= Fraction(0,1) && tick2 > Fraction(0,1));
      tempomap()->clearRange(tick1.ticks(), tick2.ticks());
      if (zeroInRange)
            tempomap()->setTempo(0, _defaultTempo);
      sigmap()->clearRange(tick1.ticks(), tick2.ticks());
      if (zeroInRange) {
            Measure* m = firstMeasure();
            if (m)
                  sigmap()->add(0, SigEvent(m->ticks(),  m->timesig(), 0));
            }
      }

//---------------------------------------------------------
//   setPause
//---------------------------------------------------------

void Score::setPause(const Fraction& tick, qreal seconds)
      {
      tempomap()->setPause(tick.ticks(), seconds);
      setPlaylistDirty();
      }

//---------------------------------------------------------
//   tempo
//---------------------------------------------------------

qreal Score::tempo(const Fraction& tick) const
      {
      return tempomap()->tempo(tick.ticks());
      }

//---------------------------------------------------------
//   loWidth
//---------------------------------------------------------

qreal Score::loWidth() const
      {
      return styleD(Sid::pageWidth) * DPI;
      }

//---------------------------------------------------------
//   loHeight
//---------------------------------------------------------

qreal Score::loHeight() const
      {
      return styleD(Sid::pageHeight) * DPI;
      }

//---------------------------------------------------------
//   cmdSelectAll
//---------------------------------------------------------

void Score::cmdSelectAll()
      {
      if (_measures.size() == 0)
            return;
      deselectAll();
      Measure* first = firstMeasureMM();
      if (!first)
            return;
      Measure* last = lastMeasureMM();
      selectRange(first, 0);
      selectRange(last, nstaves() - 1);
      setUpdateAll();
      update();
      }

//---------------------------------------------------------
//   cmdSelectSection
//---------------------------------------------------------

void Score::cmdSelectSection()
      {
      Segment* s = _selection.startSegment();
      if (s == 0)
            return;
      MeasureBase* sm = s->measure();
      MeasureBase* em = sm;
      while (sm->prev()) {
            if (sm->prev()->sectionBreak())
                  break;
            sm = sm->prev();
            }
      while (em->next()) {
            if (em->sectionBreak())
                  break;
            em = em->next();
            }
      while (sm && sm->type() != ElementType::MEASURE)
            sm = sm->next();
      while (em && em->type() != ElementType::MEASURE)
            em = em->next();
      if (sm == 0 || em == 0)
            return;

      _selection.setRange(toMeasure(sm)->first(), toMeasure(em)->last(), 0, nstaves());
      }

//---------------------------------------------------------
//   undo
//---------------------------------------------------------

void Score::undo(UndoCommand* cmd, EditData* ed) const
      {
      undoStack()->push(cmd, ed);
      }

//---------------------------------------------------------
//   linkId
//---------------------------------------------------------

int Score::linkId()
      {
      return (masterScore()->_linkId)++;
      }

// val is a used link id
void Score::linkId(int val)
      {
      Score* s = masterScore();
      if (val >= s->_linkId)
            s->_linkId = val + 1;   // update unused link id
      }

//---------------------------------------------------------
//   scoreList
//    return a list of scores containing the root score
//    and all part scores (if there are any)
//---------------------------------------------------------

QList<Score*> Score::scoreList()
      {
      QList<Score*> scores;
      Score* root = masterScore();
      scores.append(root);
      for (const Excerpt* ex : root->excerpts()) {
            if (ex->partScore())
                  scores.append(ex->partScore());
            }
      return scores;
      }

//---------------------------------------------------------
//   switchLayer
//---------------------------------------------------------

bool Score::switchLayer(const QString& s)
      {
      int layerIdx = 0;
      for (const Layer& l : layer()) {
            if (s == l.name) {
                  setCurrentLayer(layerIdx);
                  return true;
                  }
            ++layerIdx;
            }
      return false;
      }

//---------------------------------------------------------
//   appendPart
//---------------------------------------------------------

void Score::appendPart(const QString& name)
      {
      static InstrumentTemplate defaultInstrument;
      InstrumentTemplate* t;

      t = searchTemplate(name);
      if (t == 0) {
            qDebug("appendPart: <%s> not found", qPrintable(name));
            t = &defaultInstrument;
            }

      if (t->channel.empty()) {
            Channel a;
            a.setChorus(0);
            a.setReverb(0);
            a.setName(Channel::DEFAULT_NAME);
            a.setBank(0);
            a.setVolume(90);
            a.setPan(0);
            t->channel.append(a);
            }
      Part* part = new Part(this);
      part->initFromInstrTemplate(t);
      int n = nstaves();
      for (int i = 0; i < t->nstaves(); ++i) {
            Staff* staff = new Staff(this);
            staff->setPart(part);
            staff->setLines(Fraction(0,1), t->staffLines[i]);
            staff->setSmall(Fraction(0,1), t->smallStaff[i]);
            if (i == 0) {
                  staff->setBracketType(0, t->bracket[0]);
                  staff->setBracketSpan(0, t->nstaves());
                  }
            undoInsertStaff(staff, i);
            }
      part->staves()->front()->setBarLineSpan(part->nstaves());
      undoInsertPart(part, n);
      fixTicks();
      masterScore()->rebuildMidiMapping();
      }

//---------------------------------------------------------
//   appendMeasures
//---------------------------------------------------------

void Score::appendMeasures(int n)
      {
      for (int i = 0; i < n; ++i)
            insertMeasure(ElementType::MEASURE, 0, false);
      }

//---------------------------------------------------------
//   addSpanner
//---------------------------------------------------------

void Score::addSpanner(Spanner* s)
      {
      _spanner.addSpanner(s);
      }

//---------------------------------------------------------
//   removeSpanner
//---------------------------------------------------------

void Score::removeSpanner(Spanner* s)
      {
      _spanner.removeSpanner(s);
      }

//---------------------------------------------------------
//   isSpannerStartEnd
//    does is spanner start or end at tick position tick
//    for track ?
//---------------------------------------------------------

bool Score::isSpannerStartEnd(const Fraction& tick, int track) const
      {
      for (auto i : _spanner.map()) {
            if (i.second->track() != track)
                  continue;
            if (i.second->tick() == tick || i.second->tick2() == tick)
                  return true;
            }
      return false;
      }

void Score::insertTime(const Fraction& tick, const Fraction& len)
      {
      for (Staff* staff : staves())
            staff->insertTime(tick, len);
      for (Part* part : parts())
            part->insertTime(tick, len);
      }

//---------------------------------------------------------
//   addUnmanagedSpanner
//---------------------------------------------------------

void Score::addUnmanagedSpanner(Spanner* s)
      {
      _unmanagedSpanner.insert(s);
      }

//---------------------------------------------------------
//   removeSpanner
//---------------------------------------------------------

void Score::removeUnmanagedSpanner(Spanner* s)
      {
      _unmanagedSpanner.erase(s);
      }

//---------------------------------------------------------
//   setPos
//---------------------------------------------------------

void MasterScore::setPos(POS pos, Fraction tick)
      {
      if (tick < Fraction(0,1))
            tick = Fraction(0,1);
      Q_ASSERT(tick <= lastMeasure()->endTick());

      _pos[int(pos)] = tick;
      // even though tick position might not have changed, layout might have
      // so we should update cursor here
      // however, we must be careful not to call setPos() again while handling posChanged, or recursion results
      for (Score* s : scoreList())
            emit s->posChanged(pos, unsigned(tick.ticks()));
      }

//---------------------------------------------------------
//   uniqueStaves
//---------------------------------------------------------

QList<int> Score::uniqueStaves() const
      {
      QList<int> sl;

      for (int staffIdx = 0; staffIdx < nstaves(); ++staffIdx) {
            Staff* s = staff(staffIdx);
            if (s->links()) {
                  bool alreadyInList = false;
                  for (int idx : sl) {
                        if (s->links()->contains(staff(idx))) {
                              alreadyInList = true;
                              break;
                              }
                        }
                  if (alreadyInList)
                        continue;
                  }
            sl.append(staffIdx);
            }
      return sl;
      }

//---------------------------------------------------------
//   findCR
//    find chord/rest <= tick in track
//---------------------------------------------------------

ChordRest* Score::findCR(Fraction tick, int track) const
      {
      Measure* m = tick2measureMM(tick);
      if (!m) {
            qDebug("findCR: no measure for tick %d", tick.ticks());
            return nullptr;
            }
      // attach to first rest all spanner when mmRest
      if (m->isMMRest())
            tick = m->tick();
      Segment* s = m->first(SegmentType::ChordRest);
      for (Segment* ns = s; ; ns = ns->next(SegmentType::ChordRest)) {
            if (ns == 0 || ns->tick() > tick)
                  break;
            Element* el = ns->element(track);
            if (el && el->isRest() && toRest(el)->isGap())
                  continue;
            else if (el)
                  s = ns;
            }
      Element* el = s->element(track);
      if (el && el->isRest() && toRest(el)->isGap())
            s = 0;
      if (s)
            return toChordRest(s->element(track));
      return nullptr;
      }

//---------------------------------------------------------
//   findCRinStaff
//    find last chord/rest on staff that ends before tick
//---------------------------------------------------------

ChordRest* Score::findCRinStaff(const Fraction& tick, int staffIdx) const
      {
      Fraction ptick = tick - Fraction::fromTicks(1);
      Measure* m = tick2measureMM(ptick);
      if (!m) {
            qDebug("findCRinStaff: no measure for tick %d", ptick.ticks());
            return 0;
            }
      // attach to first rest all spanner when mmRest
      if (m->isMMRest())
            ptick = m->tick();

      Segment* s      = m->first(SegmentType::ChordRest);
      int strack      = staffIdx * VOICES;
      int etrack      = strack + VOICES;
      int actualTrack = strack;

      Fraction lastTick = Fraction(-1,1);
      for (Segment* ns = s; ; ns = ns->next(SegmentType::ChordRest)) {
            if (ns == 0 || ns->tick() > ptick)
                  break;
            // found a segment; now find longest cr on this staff that does not overlap tick
            for (int t = strack; t < etrack; ++t) {
                  ChordRest* cr = toChordRest(ns->element(t));
                  if (cr) {
                        Fraction endTick = cr->tick() + cr->actualTicks();
                        if (endTick >= lastTick && endTick <= tick) {
                              s = ns;
                              actualTrack = t;
                              lastTick = endTick;
                              }
                        }
                  }
            }
      if (s)
            return toChordRest(s->element(actualTrack));
      return 0;
      }

//---------------------------------------------------------
//   setSoloMute
//   called once at opening file, adds soloMute marks
//---------------------------------------------------------

void MasterScore::setSoloMute()
      {
      for (unsigned i = 0; i < _midiMapping.size(); i++) {
            Channel* b = _midiMapping[i].articulation();
            if (b->solo()) {
                  b->setSoloMute(false);
                  for (unsigned j = 0; j < _midiMapping.size(); j++) {
                        Channel* a = _midiMapping[j].articulation();
                        bool sameMidiMapping = _midiMapping[i].port() == _midiMapping[j].port() && _midiMapping[i].channel() == _midiMapping[j].channel();
                        a->setSoloMute((i != j && !a->solo() && !sameMidiMapping));
                        a->setSolo(i == j || a->solo() || sameMidiMapping);
                        }
                  }
            }
      }

//---------------------------------------------------------
//   setImportedFilePath
//---------------------------------------------------------

void Score::setImportedFilePath(const QString& filePath)
      {
      _importedFilePath = filePath;
      }

//---------------------------------------------------------
//   nmeasure
//---------------------------------------------------------

int Score::nmeasures() const
      {
      int n = 0;
      for (const Measure* m = firstMeasure(); m; m = m->nextMeasure())
            n++;
      return n;
      }

//---------------------------------------------------------
//   hasLyrics
//---------------------------------------------------------

bool Score::hasLyrics()
      {
      SegmentType st = SegmentType::ChordRest;
      for (Segment* seg = firstMeasure()->first(st); seg; seg = seg->next1(st)) {
            for (int i = 0; i < ntracks(); ++i) {
                  ChordRest* cr = toChordRest(seg->element(i));
                  if (cr && !cr->lyrics().empty())
                        return true;
                  }
            }
      return false;
      }

//---------------------------------------------------------
//   hasHarmonies
//---------------------------------------------------------

bool Score::hasHarmonies()
      {
      SegmentType st = SegmentType::ChordRest;
      for (Segment* seg = firstMeasure()->first(st); seg; seg = seg->next1(st)) {
            for (Element* e : seg->annotations()) {
                  if (e->type() == ElementType::HARMONY)
                        return true;
                  }
            }
      return false;
      }

//---------------------------------------------------------
//   lyricCount
//---------------------------------------------------------

int Score::lyricCount()
      {
      size_t count = 0;
      SegmentType st = SegmentType::ChordRest;
      for (Segment* seg = firstMeasure()->first(st); seg; seg = seg->next1(st)) {
            for (int i = 0; i < ntracks(); ++i) {
                  ChordRest* cr = toChordRest(seg->element(i));
                  if (cr)
                        count += cr->lyrics().size();
                  }
            }
      return int(count);
      }

//---------------------------------------------------------
//   harmonyCount
//---------------------------------------------------------

int Score::harmonyCount()
      {
      int count = 0;
      SegmentType st = SegmentType::ChordRest;
      for (Segment* seg = firstMeasure()->first(st); seg; seg = seg->next1(st)) {
            for (Element* e : seg->annotations()) {
                  if (e->type() == ElementType::HARMONY)
                        count++;
                  }
            }
      return count;
      }

//---------------------------------------------------------
//   extractLyrics
//---------------------------------------------------------

QString Score::extractLyrics()
      {
      QString result;
      masterScore()->setExpandRepeats(true);
      SegmentType st = SegmentType::ChordRest;
      for (int track = 0; track < ntracks(); track += VOICES) {
            bool found = false;
            size_t maxLyrics = 1;
            const RepeatList& rlist = repeatList();
            for (Measure* m = firstMeasure(); m; m = m->nextMeasure()) {
                  m->setPlaybackCount(0);
                  }
            // follow the repeat segments
            for (const RepeatSegment* rs : rlist) {
                  Fraction startTick  = Fraction::fromTicks(rs->tick);
                  Fraction endTick    = startTick + Fraction::fromTicks(rs->len());
                  for (Measure* m = tick2measure(startTick); m; m = m->nextMeasure()) {
                        int playCount = m->playbackCount();
                        for (Segment* seg = m->first(st); seg; seg = seg->next(st)) {
                              // consider voice 1 only
                              ChordRest* cr = toChordRest(seg->element(track));
                              if (!cr || cr->lyrics().empty())
                                    continue;
                              if (cr->lyrics().size() > maxLyrics)
                                    maxLyrics = cr->lyrics().size();
                              if (playCount >= int(cr->lyrics().size()))
                                    continue;
                              Lyrics* l = cr->lyrics(playCount, Placement::BELOW);  // TODO: ABOVE
                              if (!l)
                                    continue;
                              found = true;
                              QString lyric = l->plainText().trimmed();
                              if (l->syllabic() == Lyrics::Syllabic::SINGLE || l->syllabic() == Lyrics::Syllabic::END)
                                    result += lyric + " ";
                              else if (l->syllabic() == Lyrics::Syllabic::BEGIN || l->syllabic() == Lyrics::Syllabic::MIDDLE)
                                    result += lyric;
                              }
                        m->setPlaybackCount(m->playbackCount() + 1);
                        if (m->endTick() >= endTick)
                              break;
                        }
                  }
            // consider remaining lyrics
            for (unsigned lyricsNumber = 0; lyricsNumber < maxLyrics; lyricsNumber++) {
                  for (Measure* m = firstMeasure(); m; m = m->nextMeasure()) {
                        unsigned playCount = m->playbackCount();
                        if (lyricsNumber >= playCount) {
                              for (Segment* seg = m->first(st); seg; seg = seg->next(st)) {
                                    // consider voice 1 only
                                    ChordRest* cr = toChordRest(seg->element(track));
                                    if (!cr || cr->lyrics().empty())
                                          continue;
                                    if (cr->lyrics().size() > maxLyrics)
                                          maxLyrics = cr->lyrics().size();
                                    if (lyricsNumber >= cr->lyrics().size())
                                          continue;
                                    Lyrics* l = cr->lyrics(lyricsNumber, Placement::BELOW);  // TODO
                                    if (!l)
                                          continue;
                                    found = true;
                                    QString lyric = l->plainText().trimmed();
                                    if (l->syllabic() == Lyrics::Syllabic::SINGLE || l->syllabic() == Lyrics::Syllabic::END)
                                          result += lyric + " ";
                                    else if (l->syllabic() == Lyrics::Syllabic::BEGIN || l->syllabic() == Lyrics:: Syllabic::MIDDLE)
                                          result += lyric;
                                    }
                              }
                        }
                  }
            if (found)
                  result += "\n\n";
            }
      return result.trimmed();
      }

//---------------------------------------------------------
//   keysig
//---------------------------------------------------------

int Score::keysig()
      {
      Key result = Key::C;
      for (int staffIdx = 0; staffIdx < nstaves(); ++staffIdx) {
            Staff* st = staff(staffIdx);
            constexpr Fraction t(0,1);
            Key key = st->key(t);
            if (st->staffType(t)->group() == StaffGroup::PERCUSSION || st->keySigEvent(t).custom() || st->keySigEvent(t).isAtonal())       // ignore percussion and custom / atonal key
                  continue;
            result = key;
            int diff = st->part()->instrument()->transpose().chromatic;
            if (!styleB(Sid::concertPitch) && diff)
                  result = transposeKey(key, diff);
            break;
            }
      return int(result);
      }

//---------------------------------------------------------
//   duration
//---------------------------------------------------------

int Score::duration()
      {
      masterScore()->setExpandRepeats(true);
      const RepeatList& rl = repeatList();
      if (rl.empty())
            return 0;
      const RepeatSegment* rs = rl.last();
      return lrint(utick2utime(rs->utick + rs->len()));
      }

//---------------------------------------------------------
//   createRehearsalMarkText
//---------------------------------------------------------

QString Score::createRehearsalMarkText(RehearsalMark* current) const
      {
      Fraction tick = current->segment()->tick();
      RehearsalMark* before = 0;
      RehearsalMark* after = 0;
      for (Segment* s = firstSegment(SegmentType::All); s; s = s->next1()) {
            for (Element* e : s->annotations()) {
                  if (e && e->type() == ElementType::REHEARSAL_MARK) {
                        if (s->tick() < tick)
                              before = toRehearsalMark(e);
                        else if (s->tick() > tick) {
                              after = toRehearsalMark(e);
                              break;
                              }
                        }
                  }
            if (after)
                  break;
            }
      QString s = "A";
      QString s1 = before ? before->xmlText() : "";
      QString s2 = after ? after->xmlText()  : "";
      if (s1.isEmpty())
            return s;
      s = nextRehearsalMarkText(before, current);     // try to sequence
      if (s == current->xmlText()) {
            // no sequence detected (or current happens to be correct)
            return s;
            }
      else if (s == s2) {
            // next in sequence already present
            if (s1[0].isLetter()) {
                  if (s1.size() == 2)
                        s = s1[0] + QChar::fromLatin1(s1[1].toLatin1() + 1);  // BB, BC, CC
                  else
                        s = s1 + QChar::fromLatin1('1');                      // B, B1, C
                  }
            else {
                  s = s1 + QChar::fromLatin1('A');                            // 2, 2A, 3
                  }
            }
      return s;
      }

//---------------------------------------------------------
//   nextRehearsalMarkText
//    finds next rehearsal in sequence established by previous
//     Alphabetic sequences:
//      A, B, ..., Y, Z, AA, BB, ..., YY, ZZ
//      a, b, ..., y, z, aa, bb, ..., yy, zz
//     Numeric sequences:
//      1, 2, 3, ...
//      If number of previous rehearsal mark matches measure number, assume use of measure numbers throughout
//---------------------------------------------------------

QString Score::nextRehearsalMarkText(RehearsalMark* previous, RehearsalMark* current) const
      {
      QString previousText = previous->xmlText();
      QString fallback = current ? current->xmlText() : previousText + "'";

      if (previousText.length() == 1 && previousText[0].isLetter()) {
            // single letter sequence
            if (previousText == "Z")
                  return "AA";
            else if (previousText == "z")
                  return "aa";
            else
                  return QChar::fromLatin1(previousText[0].toLatin1() + 1);
            }
      else if (previousText.length() == 2 && previousText[0].isLetter() && previousText[1].isLetter()) {
            // double letter sequence
            if (previousText[0] == previousText[1]) {
                  // repeated letter sequence
                  if (previousText.toUpper() != "ZZ") {
                        QString c = QChar::fromLatin1(previousText[0].toLatin1() + 1);
                        return c + c;
                        }
                  else {
                        return fallback;
                        }
                  }
            else {
                  return fallback;
                  }
            }
      else {
            // try to interpret as number
            bool ok;
            int n = previousText.toInt(&ok);
            if (!ok) {
                  return fallback;
                  }
            else if (current && n == previous->segment()->measure()->no() + 1) {
                  // use measure number
                  n = current->segment()->measure()->no() + 1;
                  return QString("%1").arg(n);
                  }
            else {
                  // use number sequence
                  n = previousText.toInt() + 1;
                  return QString("%1").arg(n);
                  }
            }
      }

//---------------------------------------------------------
//   changeVoice
//    moves selected notes into specified voice if possible
//---------------------------------------------------------

void Score::changeVoice(int voice)
      {
      startCmd();
      QList<Element*> el;
      QList<Element*> oel = selection().elements();     // make copy
      for (Element* e : oel) {
            if (e->type() == ElementType::NOTE) {
                  Note* note   = toNote(e);
                  Chord* chord = note->chord();

                  // move grace notes with main chord only
                  if (chord->isGrace())
                        continue;

                  if (chord->voice() != voice) {
                        Segment* s       = chord->segment();
                        Measure* m       = s->measure();
                        size_t notes     = chord->notes().size();
                        int dstTrack     = chord->staffIdx() * VOICES + voice;
                        ChordRest* dstCR = toChordRest(s->element(dstTrack));
                        Chord* dstChord  = nullptr;

                        if (excerpt() && excerpt()->tracks().key(dstTrack, -1) == -1)
                              break;

                        // set up destination chord

                        if (dstCR && dstCR->type() == ElementType::CHORD && dstCR->globalTicks() == chord->globalTicks()) {
                              // existing chord in destination with correct duration;
                              //   can simply move note in
                              dstChord = toChord(dstCR);
                              }

                        else if (dstCR && dstCR->type() == ElementType::REST && dstCR->globalTicks() == chord->globalTicks()) {
                              // existing rest in destination with correct duration;
                              //   replace with chord, then move note in
                              //   this case allows for tuplets, unlike the more general case below
                              dstChord = new Chord(this);
                              dstChord->setTrack(dstTrack);
                              dstChord->setDurationType(chord->durationType());
                              dstChord->setTicks(chord->ticks());
                              dstChord->setTuplet(dstCR->tuplet());
                              dstChord->setParent(s);
                              undoRemoveElement(dstCR);
                              }

                        else if (!chord->tuplet()) {
                              // rests or gap in destination
                              //   insert new chord if the rests / gap are long enough
                              //   then move note in
                              ChordRest* pcr = nullptr;
                              ChordRest* ncr = nullptr;
                              for (Segment* s2 = m->first(SegmentType::ChordRest); s2; s2 = s2->next()) {
                                    if (s2->segmentType() != SegmentType::ChordRest)
                                          continue;
                                    ChordRest* cr2 = toChordRest(s2->element(dstTrack));
                                    if (!cr2 || cr2->type() == ElementType::REST)
                                          continue;
                                    if (s2->tick() < s->tick()) {
                                          pcr = cr2;
                                          continue;
                                          }
                                    else if (s2->tick() >= s->tick()) {
                                          ncr = cr2;
                                          break;
                                          }
                                    }
                              Fraction gapStart = pcr ? pcr->tick() + pcr->actualTicks() : m->tick();
                              Fraction gapEnd   = ncr ? ncr->tick() : m->tick() + m->ticks();
                              if (gapStart <= s->tick() && gapEnd >= s->tick() + chord->actualTicks()) {
                                    // big enough gap found
                                    dstChord = new Chord(this);
                                    dstChord->setTrack(dstTrack);
                                    dstChord->setDurationType(chord->durationType());
                                    dstChord->setTicks(chord->ticks());
                                    dstChord->setParent(s);
                                    // makeGapVoice will not back-fill an empty voice
                                    if (voice && !dstCR)
                                          expandVoice(s, /*m->first(SegmentType::ChordRest,*/ dstTrack);
                                    makeGapVoice(s, dstTrack, chord->actualTicks(), s->tick());
                                    }
                              }

                        // move note to destination chord
                        if (dstChord) {
                              // create & add new note
                              Note* newNote = new Note(*note);
                              newNote->setSelected(false);
                              newNote->setParent(dstChord);
                              undoAddElement(newNote);
                              el.append(newNote);
                              // add new chord if one was created
                              if (dstChord != dstCR)
                                    undoAddCR(dstChord, m, s->tick());
                              // reconnect the tie to this note, if any
                              Tie* tie = note->tieBack();
                              if (tie)
                                    undoChangeSpannerElements(tie, tie->startNote(), newNote);
                              // reconnect the tie from this note, if any
                              tie = note->tieFor();
                              if (tie)
                                    undoChangeSpannerElements(tie, newNote, tie->endNote());
                              // remove original note
                              if (notes > 1) {
                                    undoRemoveElement(note);
                                    }
                              else if (notes == 1) {
                                    // create rest to leave behind
                                    Rest* r = new Rest(this);
                                    r->setTrack(chord->track());
                                    r->setDurationType(chord->durationType());
                                    r->setTicks(chord->ticks());
                                    r->setTuplet(chord->tuplet());
                                    r->setParent(s);
                                    // if there were grace notes, move them
                                    for (Chord* gc : chord->graceNotes()) {
                                          Chord* ngc = new Chord(*gc);
                                          undoRemoveElement(gc);
                                          ngc->setParent(dstChord);
                                          ngc->setTrack(dstChord->track());
                                          undoAddElement(ngc);
                                          }
                                    // remove chord, replace with rest
                                    undoRemoveElement(chord);
                                    undoAddCR(r, m, s->tick());
                                    }
                              }
                        }
                  }
            }

      if (!el.empty())
            selection().clear();
      for (Element* e : el)
            select(e, SelectType::ADD, -1);
      setLayoutAll();
      endCmd();
      }

#if 0
//---------------------------------------------------------
//   cropPage - crop a single page score to the content
///    margins will be applied on the 4 sides
//---------------------------------------------------------

void Score::cropPage(qreal margins)
      {
      if (npages() == 1) {
            Page* page = pages()[0];
            if (page) {
                  QRectF ttbox = page->tbbox();

                  qreal margin = margins / INCH;
                  f.setSize(QSizeF((ttbox.width() / DPI) + 2 * margin, (ttbox.height()/ DPI) + 2 * margin));

                  qreal offset = curFormat->oddLeftMargin() - ttbox.x() / DPI;
                  if (offset < 0)
                        offset = 0.0;
                  f.setOddLeftMargin(margin + offset);
                  f.setEvenLeftMargin(margin + offset);
                  f.setOddBottomMargin(margin);
                  f.setOddTopMargin(margin);
                  f.setEvenBottomMargin(margin);
                  f.setEvenTopMargin(margin);

                  undoChangePageFormat(&f, spatium(), pageNumberOffset());
                  }
            }
      }
#endif

//---------------------------------------------------------
//   getProperty
//---------------------------------------------------------

QVariant Score::getProperty(Pid /*id*/) const
      {
      qDebug("Score::getProperty: unhandled id");
      return QVariant();
      }

//---------------------------------------------------------
//   setProperty
//---------------------------------------------------------

bool Score::setProperty(Pid /*id*/, const QVariant& /*v*/)
      {
      qDebug("Score::setProperty: unhandled id");
      setLayoutAll();
      return true;
      }

//---------------------------------------------------------
//   propertyDefault
//---------------------------------------------------------

QVariant Score::propertyDefault(Pid /*id*/) const
      {
      return QVariant();
      }

//---------------------------------------------------------
//   setStyle
//---------------------------------------------------------

void Score::setStyle(const MStyle& s)
      {
      style() = s;
      }

//---------------------------------------------------------
//   getTextStyleUserName
//---------------------------------------------------------

QString Score::getTextStyleUserName(Tid tid)
      {
      QString name = "";
      if (int(tid) >= int(Tid::USER1) && int(tid) <= int(Tid::USER6)) {
            int idx = int(tid) - int(Tid::USER1);
            Sid sid[] = { Sid::user1Name, Sid::user2Name, Sid::user3Name, Sid::user4Name, Sid::user5Name, Sid::user6Name };
            name = styleSt(sid[idx]);
            }
      if (name == "")
            name = textStyleUserName(tid);
      return name;
      }

//---------------------------------------------------------
//   MasterScore
//---------------------------------------------------------

MasterScore::MasterScore()
   : Score()
      {
      _tempomap    = new TempoMap;
      _sigmap      = new TimeSigMap();
      _repeatList  = new RepeatList(this);
      _revisions   = new Revisions;
      setMasterScore(this);

      _pos[int(POS::CURRENT)] = Fraction(0,1);
      _pos[int(POS::LEFT)]    = Fraction(0,1);
      _pos[int(POS::RIGHT)]   = Fraction(0,1);

#if defined(Q_OS_WIN)
      metaTags().insert("platform", "Microsoft Windows");
#elif defined(Q_OS_MAC)
      metaTags().insert("platform", "Apple Macintosh");
#elif defined(Q_OS_LINUX)
      metaTags().insert("platform", "Linux");
#else
      metaTags().insert("platform", "Unknown");
#endif
      metaTags().insert("movementNumber", "");
      metaTags().insert("movementTitle", "");
      metaTags().insert("workNumber", "");
      metaTags().insert("workTitle", "");
      metaTags().insert("arranger", "");
      metaTags().insert("composer", "");
      metaTags().insert("lyricist", "");
      metaTags().insert("poet", "");
      metaTags().insert("translator", "");
      metaTags().insert("source", "");
      metaTags().insert("copyright", "");
      metaTags().insert("creationDate", QDate::currentDate().toString(Qt::ISODate));
      }

MasterScore::MasterScore(const MStyle& s)
   : MasterScore{}
      {
      _movements = new Movements;
      _movements->push_back(this);
      setStyle(s);
      }

MasterScore::~MasterScore()
      {
      delete _revisions;
      delete _repeatList;
      delete _sigmap;
      delete _tempomap;
      qDeleteAll(_excerpts);
      }

//---------------------------------------------------------
//   setMovements
//---------------------------------------------------------

void MasterScore::setMovements(Movements* m)
      {
      _movements = m;
      if (_movements)
            _movements->push_back(this);
      }

//---------------------------------------------------------
//   isSavable
//---------------------------------------------------------

bool MasterScore::isSavable() const
      {
      // TODO: check if file can be created if it does not exist
      return fileInfo()->isWritable() || !fileInfo()->exists();
      }

//---------------------------------------------------------
//   setTempomap
//---------------------------------------------------------

void MasterScore::setTempomap(TempoMap* tm)
      {
      delete _tempomap;
      _tempomap = tm;
      }

//---------------------------------------------------------
//   removeOmr
//---------------------------------------------------------

void MasterScore::removeOmr()
      {
      _showOmr = false;
#ifdef OMR
      delete _omr;
#endif
      _omr = 0;
      }

//---------------------------------------------------------
//   setName
//---------------------------------------------------------

void MasterScore::setName(const QString& ss)
      {
      QString s(ss);
      s.replace('/', '_');    // for sanity
      if (!(s.endsWith(".mscz") || s.endsWith(".mscx")))
            s += ".mscz";
      info.setFile(s);
      }

//---------------------------------------------------------
//   title
//---------------------------------------------------------

QString MasterScore::title() const
      {
      return fileInfo()->completeBaseName();
      }

QString Score::title() const
      {
      return _excerpt->title();
      }

//---------------------------------------------------------
//   addRefresh
//---------------------------------------------------------

void Score::addRefresh(const QRectF& r)
      {
      _updateState.refresh |= r;
      cmdState().setUpdateMode(UpdateMode::Update);
      }

//---------------------------------------------------------
//   staffIdx
//
///  Return index for the first staff of \a part.
//---------------------------------------------------------

int Score::staffIdx(const Part* part) const
      {
      int idx = 0;
      for (Part* p : _parts) {
            if (p == part)
                  break;
            idx += p->nstaves();
            }
      return idx;
      }

//---------------------------------------------------------
//   setUpdateAll
//---------------------------------------------------------

void MasterScore::setUpdateAll()
      {
      _cmdState.setUpdateMode(UpdateMode::UpdateAll);
      }

//---------------------------------------------------------
//   setLayoutAll
//---------------------------------------------------------

void MasterScore::setLayoutAll(int staff, const Element* e)
      {
      _cmdState.setTick(Fraction(0,1));
      _cmdState.setTick(measures()->last() ? measures()->last()->endTick() : Fraction(0,1));

      if (e && e->score() == this) {
            // TODO: map staff number properly
            const int startStaff = staff == -1 ? 0 : staff;
            const int endStaff = staff == -1 ? (nstaves() - 1) : staff;
            _cmdState.setStaff(startStaff);
            _cmdState.setStaff(endStaff);

            _cmdState.setElement(e);
            }
      }

//---------------------------------------------------------
//   setLayout
//---------------------------------------------------------

void MasterScore::setLayout(const Fraction& t, int staff, const Element* e)
      {
      if (t >= Fraction(0,1))
            _cmdState.setTick(t);

      if (e && e->score() == this) {
            // TODO: map staff number properly
            _cmdState.setStaff(staff);
            _cmdState.setElement(e);
            }
      }

void MasterScore::setLayout(const Fraction& tick1, const Fraction& tick2, int staff1, int staff2, const Element* e)
      {
      if (tick1 >= Fraction(0,1))
            _cmdState.setTick(tick1);
      if (tick2 >= Fraction(0,1))
            _cmdState.setTick(tick2);

      if (e && e->score() == this) {
            // TODO: map staff number properly
            _cmdState.setStaff(staff1);
            _cmdState.setStaff(staff2);

            _cmdState.setElement(e);
            }
      }

//---------------------------------------------------------
//   setPlaybackScore
//---------------------------------------------------------

void MasterScore::setPlaybackScore(Score* score)
      {
      if (_playbackScore == score)
            return;

      _playbackScore = score;
      _playbackSettingsLinks.clear();

      if (!_playbackScore)
            return;

      for (MidiMapping& mm : _midiMapping)
            mm.articulation()->setSoloMute(true);
      for (Part* part : score->parts()) {
            for (auto& i : *part->instruments()) {
                  Instrument* instr = i.second;
                  for (Channel* ch : instr->channel()) {
                        Channel* pChannel = playbackChannel(ch);
                        Q_ASSERT(pChannel);
                        if (!pChannel)
                              continue;
                        _playbackSettingsLinks.emplace_back(pChannel, ch, /* excerpt */ true);
                        }
                  }
            }
      }

//---------------------------------------------------------
//   updateExpressive
//    change patches to their expressive equivalent or vica versa, if possible
//    This works only with MuseScore general soundfont
//
//    The first version of the function decides whether to make patches expressive
//    or not, based on the synth settings. The second will switch patches based on
//    the value of the expressive parameter.
//---------------------------------------------------------

void MasterScore::updateExpressive(Synthesizer* synth)
      {
      SynthesizerState s = synthesizerState();
      SynthesizerGroup g = s.group("master");

      int method = 1;
      for (IdValue idVal : g) {
            if (idVal.id == 4) {
                  method = idVal.data.toInt();
                  break;
                  }
            }

      updateExpressive(synth, (method != 0));
      }


void MasterScore::updateExpressive(Synthesizer* synth, bool expressive, bool force /* = false */)
      {
      if (!synth)
            return;

      if (!force) {
            SynthesizerState s = synthesizerState();
            SynthesizerGroup g = s.group("master");

            for (IdValue idVal : g) {
                  if (idVal.id == 4) {
                        int method = idVal.data.toInt();
                        if (expressive == (method == 0))
                              return; // method and expression change don't match, so don't switch}
                        }
                  }
            }

      for (Part* p : parts()) {
            const InstrumentList* il = p->instruments();
            for (auto it = il->begin(); it != il->end(); it++) {
                  Instrument* i = it->second;
                  i->switchExpressive(this, synth, expressive, force);
                  }
            }

      }

//---------------------------------------------------------
//   rebuildAndUpdateExpressive
//    implicitly rebuild midi mappings as well. Should be preferred over
//    just updateExpressive, in most cases.
//---------------------------------------------------------

void MasterScore::rebuildAndUpdateExpressive(Synthesizer* synth)
      {
      // Rebuild midi mappings to make sure we have playback channels
      rebuildMidiMapping();

      updateExpressive(synth);

      // Rebuild midi mappings again to be safe
      rebuildMidiMapping();
      }

//---------------------------------------------------------
//   isTopScore
//---------------------------------------------------------

bool Score::isTopScore() const
      {
      return !(isMaster() && static_cast<const MasterScore*>(this)->prev());
      }

//---------------------------------------------------------
//   Movements
//---------------------------------------------------------

Movements::Movements()
   : std::vector<MasterScore*>()
      {
      _undo = new UndoStack();
      }

Movements::~Movements()
      {
      qDeleteAll(_pages);
      delete _undo;
      }

//---------------------------------------------------------
//   ScoreLoad::_loading
//    If the _loading > 0 then pushes and pops to
//    the undo stack do not emit a warning.
//    Usually pushes and pops to the undo stack are only
//    valid inside a startCmd() - endCmd(). Exceptions
//    occurred during score loading.
//---------------------------------------------------------

int ScoreLoad::_loading = 0;

}