TypeScript vega-util.isObject函數代碼示例

export function formatValue(value: any, valueToHtml: (value: any) => string, maxDepth: number): string {
  if (isArray(value)) {
    return `[${value.map(v => valueToHtml(isString(v) ? v : stringify(v, maxDepth))).join(', ')}]`;
  }

  if (isObject(value)) {
    let content = '';

    const { title, ...rest } = value as any;

    if (title) {
      content += `<h2>${valueToHtml(title)}</h2>`;
    }

    const keys = Object.keys(rest);
    if (keys.length > 0) {
      content += '<table>';
      for (const key of keys) {
        let val = (rest as any)[key];
        if (isObject(val)) {
          val = stringify(val, maxDepth);
        }

        content += `<tr><td class="key">${valueToHtml(key)}:</td><td class="value">${valueToHtml(val)}</td></tr>`;
      }
      content += `</table>`;
    }

    return content || '{}'; // show empty object if there are no properties
  }

  return valueToHtml(value);
}

function getPointOverlay(markDef: MarkDef, markConfig: LineConfig, encoding: Encoding<Field>): MarkConfig {
  if (markDef.point === 'transparent') {
    return {opacity: 0};
  } else if (markDef.point) { // truthy : true or object
    return isObject(markDef.point) ? markDef.point : {};
  } else if (markDef.point !== undefined) { // false or null
    return null;
  } else { // undefined (not disabled)
    if (markConfig.point || encoding.shape) {
      // enable point overlay if config[mark].point is truthy or if encoding.shape is provided
      return isObject(markConfig.point) ? markConfig.point : {};
    }
    // markDef.point is defined as falsy
    return null;
  }
}

    return wrapCondition(model, channelDef, 'tooltip', cDef => {
      // use valueRef based on channelDef first
      const tooltipRefFromChannelDef = ref.text(cDef, model.config, opt.reactiveGeom ? 'datum.datum' : 'datum');
      if (tooltipRefFromChannelDef) {
        return tooltipRefFromChannelDef;
      }

      if (cDef === null) {
        // Allow using encoding.tooltip = null to disable tooltip
        return undefined;
      }

      // If tooltipDef does not exist, then use value from markDef or config
      const markTooltip = getFirstDefined(markDef.tooltip, getMarkConfig('tooltip', markDef, config));
      if (isString(markTooltip)) {
        return {value: markTooltip};
      } else if (isObject(markTooltip)) {
        // `tooltip` is `{fields: 'encodings' | 'fields'}`
        if (markTooltip.content === 'encoding') {
          return ref.tooltipForEncoding(encoding, config, opt);
        } else {
          return {signal: 'datum'};
        }
      }

      return undefined;
    });

export function stripAndRedirectConfig(config: Config) {
  config = duplicate(config);

  for (const prop of VL_ONLY_CONFIG_PROPERTIES) {
    delete config[prop];
  }

  // Remove Vega-Lite only axis/legend config
  if (config.axis) {
    for (const prop of VL_ONLY_GUIDE_CONFIG) {
      delete config.axis[prop];
    }
  }
  if (config.legend) {
    for (const prop of VL_ONLY_GUIDE_CONFIG) {
      delete config.legend[prop];
    }
  }

  // Remove Vega-Lite only generic mark config
  if (config.mark) {
    for (const prop of VL_ONLY_MARK_CONFIG_PROPERTIES) {
      delete config.mark[prop];
    }
  }

  for (const markType of MARK_STYLES) {
    // Remove Vega-Lite-only mark config
    for (const prop of VL_ONLY_MARK_CONFIG_PROPERTIES) {
      delete config[markType][prop];
    }

    // Remove Vega-Lite only mark-specific config
    const vlOnlyMarkSpecificConfigs = VL_ONLY_ALL_MARK_SPECIFIC_CONFIG_PROPERTY_INDEX[markType];
    if (vlOnlyMarkSpecificConfigs) {
      for (const prop of vlOnlyMarkSpecificConfigs) {
        delete config[markType][prop];
      }
    }

    // Redirect mark config to config.style so that mark config only affect its own mark type
    // without affecting other marks that share the same underlying Vega marks.
    // For example, config.rect should not affect bar marks.
    redirectConfig(config, markType);
  }

  // Redirect config.title -- so that title config do not
  // affect header labels, which also uses `title` directive to implement.
  redirectConfig(config, 'title', 'group-title');

  // Remove empty config objects
  for (const prop in config) {
    if (isObject(config[prop]) && keys(config[prop]).length === 0) {
      delete config[prop];
    }
  }

  return keys(config).length > 0 ? config : undefined;
}

//.........這裏部分代碼省略.........
      endPositionPrefix: 'upper_whisker',
      extraEncoding: whiskerTooltipEncoding
    }),
    ...makeBoxPlotExtent({
      partName: 'ticks',
      mark: endTick,
      positionPrefix: 'lower_whisker',
      extraEncoding: whiskerTooltipEncoding
    }),
    ...makeBoxPlotExtent({
      partName: 'ticks',
      mark: endTick,
      positionPrefix: 'upper_whisker',
      extraEncoding: whiskerTooltipEncoding
    })
  ];

  // ## Box Layers

  // TODO: support hiding certain mark parts
  const boxLayers: NormalizedUnitSpec[] = [
    ...(boxPlotType !== 'tukey' ? whiskerLayers : []),
    ...makeBoxPlotBox({
      partName: 'box',
      mark: {type: 'bar', ...(sizeValue ? {size: sizeValue} : {})},
      positionPrefix: 'lower_box',
      endPositionPrefix: 'upper_box',
      extraEncoding: fiveSummaryTooltipEncoding
    }),
    ...makeBoxPlotMidTick({
      partName: 'median',
      mark: {
        type: 'tick',
        ...(isObject(config.boxplot.median) && config.boxplot.median.color ? {color: config.boxplot.median.color} : {}),
        ...(sizeValue ? {size: sizeValue} : {}),
        orient: ticksOrient
      },
      positionPrefix: 'mid_box',
      extraEncoding: fiveSummaryTooltipEncoding
    })
  ];

  // ## Filtered Layers

  let filteredLayersMixins: NormalizedUnitSpec | NormalizedLayerSpec;

  if (boxPlotType !== 'min-max') {
    const lowerBoxExpr = `datum["lower_box_${continuousAxisChannelDef.field}"]`;
    const upperBoxExpr = `datum["upper_box_${continuousAxisChannelDef.field}"]`;
    const iqrExpr = `(${upperBoxExpr} - ${lowerBoxExpr})`;
    const lowerWhiskerExpr = `${lowerBoxExpr} - ${extent} * ${iqrExpr}`;
    const upperWhiskerExpr = `${upperBoxExpr} + ${extent} * ${iqrExpr}`;
    const fieldExpr = `datum["${continuousAxisChannelDef.field}"]`;

    const joinaggregateTransform: JoinAggregateTransform = {
      joinaggregate: boxParamsQuartiles(continuousAxisChannelDef.field),
      groupby
    };

    let filteredWhiskerSpec: NormalizedLayerSpec = undefined;
    if (boxPlotType === 'tukey') {
      filteredWhiskerSpec = {
        transform: [
          {
            filter: `(${lowerWhiskerExpr} <= ${fieldExpr}) && (${fieldExpr} <= ${upperWhiskerExpr})`
          },

function parseSingleChannelDomain(
  scaleType: ScaleType,
  domain: Domain,
  model: UnitModel,
  channel: ScaleChannel | 'x2' | 'y2'
): VgNonUnionDomain[] {
  const fieldDef = model.fieldDef(channel);

  if (domain && domain !== 'unaggregated' && !isSelectionDomain(domain)) {
    // explicit value
    const {type, timeUnit} = fieldDef;
    if (type === 'temporal' || timeUnit) {
      return mapDomainToDataSignal<number | string | boolean | DateTime>(domain, type, timeUnit);
    }

    return [domain];
  }

  const stack = model.stack;
  if (stack && channel === stack.fieldChannel) {
    if (stack.offset === 'normalize') {
      return [[0, 1]];
    }

    const data = model.requestDataName(MAIN);
    return [
      {
        data,
        field: model.vgField(channel, {suffix: 'start'})
      },
      {
        data,
        field: model.vgField(channel, {suffix: 'end'})
      }
    ];
  }

  const sort: undefined | true | VgSortField = isScaleChannel(channel)
    ? domainSort(model, channel, scaleType)
    : undefined;

  if (domain === 'unaggregated') {
    const data = model.requestDataName(MAIN);
    const {field} = fieldDef;
    return [
      {
        data,
        field: vgField({field, aggregate: 'min'})
      },
      {
        data,
        field: vgField({field, aggregate: 'max'})
      }
    ];
  } else if (isBinning(fieldDef.bin)) {
    if (hasDiscreteDomain(scaleType)) {
      if (scaleType === 'bin-ordinal') {
        // we can omit the domain as it is inferred from the `bins` property
        return [];
      }

      // ordinal bin scale takes domain from bin_range, ordered by bin start
      // This is useful for both axis-based scale (x/y) and legend-based scale (other channels).
      return [
        {
          // If sort by aggregation of a specified sort field, we need to use RAW table,
          // so we can aggregate values for the scale independently from the main aggregation.
          data: util.isBoolean(sort) ? model.requestDataName(MAIN) : model.requestDataName(RAW),
          // Use range if we added it and the scale does not support computing a range as a signal.
          field: model.vgField(channel, binRequiresRange(fieldDef, channel) ? {binSuffix: 'range'} : {}),
          // we have to use a sort object if sort = true to make the sort correct by bin start
          sort:
            sort === true || !isObject(sort)
              ? {
                  field: model.vgField(channel, {}),
                  op: 'min' // min or max doesn't matter since we sort by the start of the bin range
                }
              : sort
        }
      ];
    } else {
      // continuous scales
      if (isBinning(fieldDef.bin)) {
        const signalName = model.getName(vgField(fieldDef, {suffix: 'bins'}));
        return [
          new SignalRefWrapper(() => {
            const signal = model.getSignalName(signalName);
            return `[${signal}.start, ${signal}.stop]`;
          })
        ];
      } else {
        return [
          {
            data: model.requestDataName(MAIN),
            field: model.vgField(channel, {})
          }
        ];
      }
    }
  } else if (sort) {
//.........這裏部分代碼省略.........

export function isBinParams(bin: BinParams | boolean | 'binned'): bin is BinParams {
  return isObject(bin);
}