@grafana/ui/dist/esm/graveyard/GraphNG/utils.mjs.map

Grafana Components Library

{"version":3,"file":"utils.mjs","sources":["../../../../src/graveyard/GraphNG/utils.ts"],"sourcesContent":["import { DataFrame, Field, FieldConfig, FieldType, outerJoinDataFrames, TimeRange } from '@grafana/data';\nimport {\n  AxisPlacement,\n  GraphDrawStyle,\n  GraphFieldConfig,\n  ScaleDistribution,\n  ScaleDistributionConfig,\n} from '@grafana/schema';\n\nimport { FIXED_UNIT } from '../../components/uPlot/types';\n\nimport { applyNullInsertThreshold } from './nullInsertThreshold';\nimport { nullToUndefThreshold } from './nullToUndefThreshold';\nimport { XYFieldMatchers } from './types';\n\nfunction isVisibleBarField(f: Field) {\n  return (\n    f.type === FieldType.number && f.config.custom?.drawStyle === GraphDrawStyle.Bars && !f.config.custom?.hideFrom?.viz\n  );\n}\n\nexport function getRefField(frame: DataFrame, refFieldName?: string | null) {\n  return frame.fields.find((field) => {\n    // note: getFieldDisplayName() would require full DF[]\n    return refFieldName != null ? field.name === refFieldName : field.type === FieldType.time;\n  });\n}\n\n// will mutate the DataFrame's fields' values\nfunction applySpanNullsThresholds(frame: DataFrame, refFieldName?: string | null) {\n  const refField = getRefField(frame, refFieldName);\n\n  let refValues = refField?.values;\n\n  for (let i = 0; i < frame.fields.length; i++) {\n    let field = frame.fields[i];\n\n    if (field === refField || isVisibleBarField(field)) {\n      continue;\n    }\n\n    let spanNulls = field.config.custom?.spanNulls;\n\n    if (typeof spanNulls === 'number') {\n      if (spanNulls !== -1 && refValues) {\n        field.values = nullToUndefThreshold(refValues, field.values, spanNulls);\n      }\n    }\n  }\n\n  return frame;\n}\n\nexport function preparePlotFrame(frames: DataFrame[], dimFields: XYFieldMatchers, timeRange?: TimeRange | null) {\n  let xField: Field;\n  loop: for (let frame of frames) {\n    for (let field of frame.fields) {\n      if (dimFields.x(field, frame, frames)) {\n        xField = field;\n        break loop;\n      }\n    }\n  }\n\n  // apply null insertions at interval\n  frames = frames.map((frame) => {\n    if (!xField?.state?.nullThresholdApplied) {\n      return applyNullInsertThreshold({\n        frame,\n        refFieldName: xField.name,\n        refFieldPseudoMin: timeRange?.from.valueOf(),\n        refFieldPseudoMax: timeRange?.to.valueOf(),\n      });\n    } else {\n      return frame;\n    }\n  });\n\n  let numBarSeries = 0;\n\n  frames.forEach((frame) => {\n    frame.fields.forEach((f) => {\n      if (isVisibleBarField(f)) {\n        // prevent minesweeper-expansion of nulls (gaps) when joining bars\n        // since bar width is determined from the minimum distance between non-undefined values\n        // (this strategy will still retain any original pre-join nulls, though)\n        f.config.custom = {\n          ...f.config.custom,\n          spanNulls: -1,\n        };\n\n        numBarSeries++;\n      }\n    });\n  });\n\n  // to make bar widths of all series uniform (equal to narrowest bar series), find smallest distance between x points\n  let minXDelta = Infinity;\n\n  if (numBarSeries > 1) {\n    frames.forEach((frame) => {\n      if (!frame.fields.some(isVisibleBarField)) {\n        return;\n      }\n\n      const xVals = xField.values;\n\n      for (let i = 0; i < xVals.length; i++) {\n        if (i > 0) {\n          minXDelta = Math.min(minXDelta, xVals[i] - xVals[i - 1]);\n        }\n      }\n    });\n  }\n\n  let alignedFrame = outerJoinDataFrames({\n    frames,\n    joinBy: dimFields.x,\n    keep: dimFields.y,\n    keepOriginIndices: true,\n  });\n\n  if (alignedFrame) {\n    alignedFrame = applySpanNullsThresholds(alignedFrame, xField!.name);\n\n    // append 2 null vals at minXDelta to bar series\n    if (minXDelta !== Infinity) {\n      alignedFrame.fields.forEach((f, fi) => {\n        let vals = f.values;\n\n        if (fi === 0) {\n          let lastVal = vals[vals.length - 1];\n          vals.push(lastVal + minXDelta, lastVal + 2 * minXDelta);\n        } else if (isVisibleBarField(f)) {\n          vals.push(null, null);\n        } else {\n          vals.push(undefined, undefined);\n        }\n      });\n\n      alignedFrame.length += 2;\n    }\n\n    return alignedFrame;\n  }\n\n  return null;\n}\n\nexport function buildScaleKey(config: FieldConfig<GraphFieldConfig>, fieldType: FieldType) {\n  const defaultPart = 'na';\n\n  const scaleRange = `${config.min !== undefined ? config.min : defaultPart}-${\n    config.max !== undefined ? config.max : defaultPart\n  }`;\n\n  const scaleSoftRange = `${config.custom?.axisSoftMin !== undefined ? config.custom.axisSoftMin : defaultPart}-${\n    config.custom?.axisSoftMax !== undefined ? config.custom.axisSoftMax : defaultPart\n  }`;\n\n  const scalePlacement = `${\n    config.custom?.axisPlacement !== undefined ? config.custom?.axisPlacement : AxisPlacement.Auto\n  }`;\n\n  const scaleUnit = config.unit ?? FIXED_UNIT;\n\n  const scaleDistribution = config.custom?.scaleDistribution\n    ? getScaleDistributionPart(config.custom.scaleDistribution)\n    : ScaleDistribution.Linear;\n\n  const scaleLabel = Boolean(config.custom?.axisLabel) ? config.custom!.axisLabel : defaultPart;\n\n  return `${scaleUnit}/${scaleRange}/${scaleSoftRange}/${scalePlacement}/${scaleDistribution}/${scaleLabel}/${fieldType}`;\n}\n\nfunction getScaleDistributionPart(config: ScaleDistributionConfig) {\n  if (config.type === ScaleDistribution.Log) {\n    return `${config.type}${config.log}`;\n  }\n  return 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