Examples with Column com.xenoage.zong.core.music.util.Column used on opensource projects

Example 1 with Column

use of com.xenoage.zong.core.music.util.Column in project Zong by Xenoage.

the class ColumnSpacer method compute.

/**
 * Computes a {@link ColumnSpacing} from a measure column.
 * @param context         the current context, with the current {@link MP} and precomputed
 *                        element {@link Notation}s
 * @param createLeading   true, if a leading spacing has to be created, otherwise false
 * @param notations       the precomputed notations of the measure and voice elements
 */
public ColumnSpacing compute(Context context, boolean createLeading, Notations notations) {
    context.saveMp();
    int measureIndex = context.mp.measure;
    Column column = context.score.getColumn(measureIndex);
    ColumnHeader columnHeader = context.score.getHeader().getColumnHeader(measureIndex);
    // compute the optimal spacings for each voice separately
    List<List<VoiceSpacing>> voiceSpacingsByStaff = alist();
    for (int iStaff : range(column)) {
        List<VoiceSpacing> vss = alist();
        Measure measure = column.get(iStaff);
        for (Voice voice : measure.getVoices()) {
            context.mp = MP.atVoice(iStaff, measureIndex, measure.getVoices().indexOf(voice));
            VoiceSpacing vs = singleVoiceSpacer.compute(context, notations);
            vss.add(vs);
        }
        voiceSpacingsByStaff.add(vss);
    }
    // compute the measure elements (like inner clefs) and accordingly updated voice spacings
    ArrayList<List<ElementSpacing>> optimalMeasureElementsSpacingsByStaff = alist();
    for (int iStaff : range(column)) {
        context.mp = MP.atMeasure(iStaff, measureIndex);
        List<ElementSpacing> measureSpacing = measureElementsSpacer.compute(context, createLeading, voiceSpacingsByStaff.get(iStaff), notations);
        optimalMeasureElementsSpacingsByStaff.add(measureSpacing);
    }
    // compute the common beat offsets of this measure column
    Fraction measureBeats = context.score.getMeasureBeats(measureIndex);
    VoiceSpacingsByStaff voiceSpacings = new VoiceSpacingsByStaff(voiceSpacingsByStaff);
    List<BeatOffset> beatOffsets = voicesBeatOffsetter.compute(voiceSpacings.getAll(), measureBeats, context.settings.offsetBeatsMinimal);
    // recompute beat offsets with respect to barlines
    BarlinesBeatOffsetter.Result offsets = barlinesBeatOffsetter.compute(beatOffsets, columnHeader, context.score.getMaxIS());
    beatOffsets = offsets.voiceElementOffsets;
    List<BeatOffset> barlineOffsets = offsets.barlineOffsets;
    // compute the spacings for the whole column, so that equal beats are aligned
    ArrayList<List<ElementSpacing>> alignedMeasureElementsSpacingsByStaff = alist();
    for (int iStaff : range(column)) {
        Measure measure = column.get(iStaff);
        // voice spacings
        for (int iVoice : range(measure.getVoices())) alignedVoicesSpacer.compute(voiceSpacings.get(iStaff, iVoice), beatOffsets);
        // measure elements, based on the aligned voice spacings
        context.mp = atMeasure(iStaff, measureIndex);
        alignedMeasureElementsSpacingsByStaff.add(measureElementsSpacer.compute(context, createLeading, voiceSpacings.getStaff(iStaff), notations));
    }
    // compute spacings for each staff
    List<MeasureSpacing> measureSpacings = alist(column.size());
    for (int iStaff : range(column)) {
        // create leading spacing, if needed
        LeadingSpacing leadingSpacing = null;
        if (createLeading) {
            context.mp = atBeat(iStaff, measureIndex, 0, Fraction.Companion.get_0());
            leadingSpacing = leadingSpacer.compute(context, notations);
        }
        // create measure spacing
        float interlineSpace = context.score.getInterlineSpace(iStaff);
        measureSpacings.add(new MeasureSpacing(atMeasure(iStaff, measureIndex), interlineSpace, voiceSpacings.getStaff(iStaff), alignedMeasureElementsSpacingsByStaff.get(iStaff), leadingSpacing));
    }
    context.restoreMp();
    return new ColumnSpacing(measureIndex, measureSpacings, beatOffsets, barlineOffsets);
}