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lyricsline.cpp
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lyricsline.cpp
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//=============================================================================
// MuseScore
// Music Composition & Notation
//
// Copyright (C) 2002-2018 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
//=============================================================================
#include "lyrics.h"
#include "chord.h"
#include "score.h"
#include "sym.h"
#include "system.h"
#include "xml.h"
#include "staff.h"
#include "segment.h"
#include "undo.h"
#include "textedit.h"
#include "measure.h"
namespace Ms {
// metrics for dashes and melisma; all in sp. units:
static constexpr qreal LYRICS_DASH_Y_POS_RATIO = 0.67; // the fraction of lyrics font x-height to
// raise the dashes above text base line;
//---------------------------------------------------------
// searchNextLyrics
//---------------------------------------------------------
static Lyrics* searchNextLyrics(Segment* s, int staffIdx, int verse, Placement p)
{
Lyrics* l = 0;
while ((s = s->next1(SegmentType::ChordRest))) {
int strack = staffIdx * VOICES;
int etrack = strack + VOICES;
// search through all tracks of current staff looking for a lyric in specified verse
for (int track = strack; track < etrack; ++track) {
ChordRest* cr = toChordRest(s->element(track));
if (cr) {
// cr with lyrics found, but does it have a syllable in specified verse?
l = cr->lyrics(verse, p);
if (l)
break;
}
}
if (l)
break;
}
return l;
}
//---------------------------------------------------------
// LyricsLine
//---------------------------------------------------------
LyricsLine::LyricsLine(Score* s)
: SLine(s, ElementFlag::NOT_SELECTABLE)
{
setGenerated(true); // no need to save it, as it can be re-generated
setDiagonal(false);
setLineWidth(score()->styleP(Sid::lyricsDashLineThickness));
setAnchor(Spanner::Anchor::SEGMENT);
_nextLyrics = 0;
}
LyricsLine::LyricsLine(const LyricsLine& g)
: SLine(g)
{
_nextLyrics = 0;
}
//---------------------------------------------------------
// styleChanged
//---------------------------------------------------------
void LyricsLine::styleChanged()
{
setLineWidth(score()->styleP(Sid::lyricsDashLineThickness));
}
//---------------------------------------------------------
// layout
//---------------------------------------------------------
void LyricsLine::layout()
{
bool tempMelismaTicks = (lyrics()->ticks() == Fraction::fromTicks(Lyrics::TEMP_MELISMA_TICKS));
if (lyrics()->ticks().isNotZero()) { // melisma
setLineWidth(score()->styleP(Sid::lyricsLineThickness));
// if lyrics has a temporary one-chord melisma, set to 0 ticks (just its own chord)
if (tempMelismaTicks)
lyrics()->setTicks(Fraction(0,1));
// Lyrics::_ticks points to the beginning of the last spanned segment,
// but the line shall include it:
// include the duration of this last segment in the melisma duration
Segment* lyricsSegment = lyrics()->segment();
Fraction lyricsStartTick = lyricsSegment->tick();
Fraction lyricsEndTick = lyrics()->endTick();
int lyricsTrack = lyrics()->track();
// find segment with tick >= endTick
Segment* s = lyricsSegment;
while (s && s->tick() < lyricsEndTick)
s = s->nextCR(lyricsTrack, true);
if (!s) {
// user probably deleted measures at end of score, leaving this melisma too long
// set s to last segment and reset lyricsEndTick to trigger FIXUP code below
s = score()->lastSegment();
lyricsEndTick = Fraction(-1,1);
}
Element* se = s->element(lyricsTrack);
// everything is OK if we have reached a chord at right tick on right track
if (s->tick() == lyricsEndTick && se && se->type() == ElementType::CHORD) {
// advance to next CR, or last segment if no next CR
s = s->nextCR(lyricsTrack, true);
if (!s)
s = score()->lastSegment();
}
else {
// FIXUP - lyrics tick count not valid
// this happens if edits to score have removed the original end segment
// so let's fix it here
// s is already pointing to segment past endTick (or to last segment)
// we should shorten the lyrics tick count to make this work
Segment* ns = s;
Segment* ps = s->prev1(SegmentType::ChordRest);
while (ps && ps != lyricsSegment) {
Element* pe = ps->element(lyricsTrack);
// we're looking for an actual chord on this track
if (pe && pe->type() == ElementType::CHORD)
break;
s = ps;
ps = ps->prev1(SegmentType::ChordRest);
}
if (!ps || ps == lyricsSegment) {
// no valid previous CR, so try to lengthen melisma instead
ps = ns;
s = ps->nextCR(lyricsTrack, true);
Element* e = s ? s->element(lyricsTrack) : nullptr;
// check to make sure we have a chord
if (!e || e->type() != ElementType::CHORD) {
// nothing to do but set ticks to 0
// this will result in melisma being deleted later
lyrics()->undoChangeProperty(Pid::LYRIC_TICKS, 0);
setTicks(Fraction(0,1));
return;
}
}
lyrics()->undoChangeProperty(Pid::LYRIC_TICKS, ps->tick() - lyricsStartTick);
}
// Spanner::computeEndElement() will actually ignore this value and use the (earlier) lyrics()->endTick() instead
// still, for consistency with other lines, we should set the ticks for this to the computed (later) value
setTicks(s->tick() - lyricsStartTick);
}
else { // dash(es)
_nextLyrics = searchNextLyrics(lyrics()->segment(), staffIdx(), lyrics()->no(), lyrics()->placement());
setTick2(_nextLyrics ? _nextLyrics->segment()->tick() : tick());
}
if (ticks().isNotZero()) { // only do layout if some time span
// do layout with non-0 duration
if (tempMelismaTicks)
lyrics()->setTicks(Fraction::fromTicks(Lyrics::TEMP_MELISMA_TICKS));
}
}
//---------------------------------------------------------
// layoutSystem
//---------------------------------------------------------
SpannerSegment* LyricsLine::layoutSystem(System* system)
{
Fraction stick = system->firstMeasure()->tick();
Fraction etick = system->lastMeasure()->endTick();
LyricsLineSegment* lineSegm = toLyricsLineSegment(getNextLayoutSystemSegment(system, [this]() { return createLineSegment(); }));
SpannerSegmentType sst;
if (tick() >= stick) {
layout();
if (ticks().isZero()) // only do layout if some time span
return nullptr;
SLine::layout();
//
// this is the first call to layoutSystem,
// processing the first line segment
//
computeStartElement();
computeEndElement();
sst = tick2() <= etick ? SpannerSegmentType::SINGLE : SpannerSegmentType::BEGIN;
}
else if (tick() < stick && tick2() > etick) {
sst = SpannerSegmentType::MIDDLE;
}
else {
//
// this is the last call to layoutSystem
// processing the last line segment
//
sst = SpannerSegmentType::END;
}
lineSegm->setSpannerSegmentType(sst);
switch (sst) {
case SpannerSegmentType::SINGLE: {
System* s;
QPointF p1 = linePos(Grip::START, &s);
QPointF p2 = linePos(Grip::END, &s);
qreal len = p2.x() - p1.x();
lineSegm->setPos(p1);
lineSegm->setPos2(QPointF(len, p2.y() - p1.y()));
}
break;
case SpannerSegmentType::BEGIN: {
System* s;
QPointF p1 = linePos(Grip::START, &s);
lineSegm->setPos(p1);
qreal x2 = system->bbox().right();
lineSegm->setPos2(QPointF(x2 - p1.x(), 0.0));
}
break;
case SpannerSegmentType::MIDDLE: {
Measure* firstMeasure = system->firstMeasure();
Segment* firstCRSeg = firstMeasure->first(SegmentType::ChordRest);
qreal x1 = (firstCRSeg ? firstCRSeg->pos().x() : 0) + firstMeasure->pos().x();
qreal x2 = system->bbox().right();
System* s;
QPointF p1 = linePos(Grip::START, &s);
lineSegm->setPos(QPointF(x1, p1.y()));
lineSegm->setPos2(QPointF(x2 - x1, 0.0));
}
break;
case SpannerSegmentType::END: {
qreal offset = 0.0;
System* s;
QPointF p2 = linePos(Grip::END, &s);
Measure* firstMeas = system->firstMeasure();
Segment* firstCRSeg = firstMeas->first(SegmentType::ChordRest);
if (anchor() == Anchor::SEGMENT || anchor() == Anchor::MEASURE) {
// start line just after previous element (eg, key signature)
firstCRSeg = firstCRSeg->prev();
Element* e = firstCRSeg ? firstCRSeg->element(staffIdx() * VOICES) : nullptr;
if (e)
offset = e->width();
}
qreal x1 = (firstCRSeg ? firstCRSeg->pos().x() : 0) + firstMeas->pos().x() + offset;
qreal len = p2.x() - x1;
lineSegm->setPos(QPointF(p2.x() - len, p2.y()));
lineSegm->setPos2(QPointF(len, 0.0));
}
break;
}
lineSegm->layout();
// if temp melisma extend the first line segment to be
// after the lyrics syllable (otherwise the melisma segment
// will be too short).
const bool tempMelismaTicks = (lyrics()->ticks() == Fraction::fromTicks(Lyrics::TEMP_MELISMA_TICKS));
if (tempMelismaTicks && spannerSegments().size() > 0 && spannerSegments().front() == lineSegm)
lineSegm->rxpos2() += lyrics()->width();
// avoid backwards melisma
if (lineSegm->pos2().x() < 0)
lineSegm->rxpos2() = 0;
return lineSegm;
}
//---------------------------------------------------------
// createLineSegment
//---------------------------------------------------------
LineSegment* LyricsLine::createLineSegment()
{
LyricsLineSegment* seg = new LyricsLineSegment(this, score());
seg->setTrack(track());
seg->setColor(color());
return seg;
}
//---------------------------------------------------------
// removeUnmanaged
// same as Spanner::removeUnmanaged(), but in addition, remove from hosting Lyrics
//---------------------------------------------------------
void LyricsLine::removeUnmanaged()
{
Spanner::removeUnmanaged();
if (lyrics())
lyrics()->remove(this);
}
//---------------------------------------------------------
// setProperty
//---------------------------------------------------------
bool LyricsLine::setProperty(Pid propertyId, const QVariant& v)
{
switch (propertyId) {
case Pid::SPANNER_TICKS:
{
// if parent lyrics has a melisma, change its length too
if (parent() && parent()->type() == ElementType::LYRICS
&& toLyrics(parent())->ticks() > Fraction(0,1)) {
Fraction newTicks = toLyrics(parent())->ticks() + v.value<Fraction>() - ticks();
parent()->undoChangeProperty(Pid::LYRIC_TICKS, newTicks);
}
setTicks(v.value<Fraction>());
}
break;
default:
if (!SLine::setProperty(propertyId, v))
return false;
break;
}
score()->setLayoutAll();
return true;
}
//=========================================================
// LyricsLineSegment
//=========================================================
LyricsLineSegment::LyricsLineSegment(Spanner* sp, Score* s)
: LineSegment(sp, s, ElementFlag::ON_STAFF | ElementFlag::NOT_SELECTABLE)
{
setGenerated(true);
}
//---------------------------------------------------------
// layout
//---------------------------------------------------------
void LyricsLineSegment::layout()
{
ryoffset() = 0.0;
bool endOfSystem = false;
bool isEndMelisma = lyricsLine()->lyrics()->ticks() > Fraction(0,1);
Lyrics* lyr = 0;
Lyrics* nextLyr = 0;
qreal fromX = 0;
qreal toX = 0; // start and end point of intra-lyrics room
qreal sp = spatium();
System* sys;
if (lyricsLine()->ticks() <= Fraction(0,1)) { // if no span,
_numOfDashes = 0; // nothing to draw
return; // and do nothing
}
// HORIZONTAL POSITION
// A) if line precedes a syllable, advance line end to right before the next syllable text
// if not a melisma and there is a next syllable;
if (!isEndMelisma && lyricsLine()->nextLyrics() && isSingleEndType()) {
lyr = nextLyr = lyricsLine()->nextLyrics();
sys = lyr->segment()->system();
endOfSystem = (sys != system());
// if next lyrics is on a different system, this line segment is at the end of its system:
// do not adjust for next lyrics position
if (sys && !endOfSystem) {
qreal lyrX = lyr->bbox().x();
qreal lyrXp = lyr->pagePos().x();
qreal sysXp = sys->pagePos().x();
toX = lyrXp - sysXp + lyrX; // syst.rel. X pos.
qreal offsetX = toX - pos().x() - pos2().x() - score()->styleP(Sid::lyricsDashPad);
// delta from current end pos.| ending padding
rxpos2() += offsetX;
}
}
// B) if line follows a syllable, advance line start to after the syllable text
lyr = lyricsLine()->lyrics();
sys = lyr->segment()->system();
if (sys && isSingleBeginType()) {
qreal lyrX = lyr->bbox().x();
qreal lyrXp = lyr->pagePos().x();
qreal lyrW = lyr->bbox().width();
qreal sysXp = sys->pagePos().x();
fromX = lyrXp - sysXp + lyrX + lyrW;
// syst.rel. X pos. | lyr.advance
qreal offsetX = fromX - pos().x();
offsetX += score()->styleP(isEndMelisma ? Sid::lyricsMelismaPad : Sid::lyricsDashPad);
// delta from curr.pos. | add initial padding
rxpos() += offsetX;
rxpos2() -= offsetX;
}
// VERTICAL POSITION: at the base line of the syllable text
if (!isEndType()) {
rypos() = lyr->ipos().y();
ryoffset() = lyr->offset().y();
}
else {
// use Y position of *next* syllable if there is one on same system
Lyrics* nextLyr1 = searchNextLyrics(lyr->segment(), lyr->staffIdx(), lyr->no(), lyr->placement());
if (nextLyr1 && nextLyr1->segment()->system() == system()) {
rypos() = nextLyr1->ipos().y();
ryoffset() = nextLyr1->offset().y();
}
else {
rypos() = lyr->ipos().y();
ryoffset() = lyr->offset().y();
}
}
// MELISMA vs. DASHES
if (isEndMelisma) { // melisma
_numOfDashes = 1;
rypos() -= lyricsLine()->lineWidth() * .5; // let the line 'sit on' the base line
qreal offsetX = score()->styleP(Sid::minNoteDistance) * mag();
// if final segment, extend slightly after the chord, otherwise shorten it
rxpos2() += (isBeginType() || isEndType()) ? -offsetX : +offsetX;
}
else { // dash(es)
// set conventional dash Y pos
rypos() -= MScore::pixelRatio * lyr->fontMetrics().xHeight() * score()->styleD(Sid::lyricsDashYposRatio);
_dashLength = score()->styleP(Sid::lyricsDashMaxLength) * mag(); // and dash length
qreal len = pos2().x();
qreal minDashLen = score()->styleS(Sid::lyricsDashMinLength).val() * sp;
qreal maxDashDist = score()->styleS(Sid::lyricsDashMaxDistance).val() * sp;
if (len < minDashLen) { // if no room for a dash
// if at end of system or dash is forced
if (endOfSystem || score()->styleB(Sid::lyricsDashForce)) {
rxpos2() = minDashLen; // draw minimal dash
_numOfDashes = 1;
_dashLength = minDashLen;
}
else // if within system or dash not forced
_numOfDashes = 0; // draw no dash
}
else if (len < (maxDashDist * 1.5)) { // if no room for two dashes
_numOfDashes = 1; // draw one dash
if (_dashLength > len) // if no room for a full dash
_dashLength = len; // shorten it
}
else
_numOfDashes = len / maxDashDist + 1; // draw several dashes
// adjust next lyrics horiz. position if too little a space forced to skip the dash
if (_numOfDashes == 0 && nextLyr != nullptr && len > 0)
nextLyr->rxpos() -= (toX - fromX);
}
// set bounding box
QRectF r = QRectF(0.0, 0.0, pos2().x(), pos2().y()).normalized();
qreal lw = lyricsLine()->lineWidth() * .5;
setbbox(r.adjusted(-lw, -lw, lw, lw));
}
//---------------------------------------------------------
// draw
//---------------------------------------------------------
void LyricsLineSegment::draw(QPainter* painter) const
{
if (_numOfDashes < 1) // nothing to draw
return;
QPen pen(lyricsLine()->lyrics()->curColor());
pen.setWidthF(lyricsLine()->lineWidth());
pen.setCapStyle(Qt::FlatCap);
painter->setPen(pen);
if (lyricsLine()->lyrics()->ticks() > Fraction(0,1)) // melisma
painter->drawLine(QPointF(), pos2());
else { // dash(es)
qreal step = pos2().x() / _numOfDashes;
qreal x = step * .5 - _dashLength * .5;
for (int i = 0; i < _numOfDashes; i++, x += step)
painter->drawLine(QPointF(x, 0.0), QPointF(x + _dashLength, 0.0));
}
}
}