updateElements()

in Hands-on lab/lab-files/starter-project/NorthwindMVC/wwwroot/lib/Chart.js/chart.js [8276:8308]

• 33 lines of code
• 17 McCabe index (conditional complexity)

  updateElements(points, start, count, mode) {
    const me = this;
    const reset = mode === 'reset';
    const {iScale, vScale, _stacked} = me._cachedMeta;
    const firstOpts = me.resolveDataElementOptions(start, mode);
    const sharedOptions = me.getSharedOptions(firstOpts);
    const includeOptions = me.includeOptions(mode, sharedOptions);
    const iAxis = iScale.axis;
    const vAxis = vScale.axis;
    const spanGaps = me.options.spanGaps;
    const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;
    const directUpdate = me.chart._animationsDisabled || reset || mode === 'none';
    let prevParsed = start > 0 && me.getParsed(start - 1);
    for (let i = start; i < start + count; ++i) {
      const point = points[i];
      const parsed = me.getParsed(i);
      const properties = directUpdate ? point : {};
      const nullData = isNullOrUndef(parsed[vAxis]);
      const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);
      const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? me.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);
      properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;
      properties.stop = i > 0 && (parsed[iAxis] - prevParsed[iAxis]) > maxGapLength;
      properties.parsed = parsed;
      if (includeOptions) {
        properties.options = sharedOptions || me.resolveDataElementOptions(i, point.active ? 'active' : mode);
      }
      if (!directUpdate) {
        me.updateElement(point, i, properties, mode);
      }
      prevParsed = parsed;
    }
    me.updateSharedOptions(sharedOptions, mode, firstOpts);
  }