src/features/history-chart/HistoryChart.tsx

@@ -72,7 +72,7 @@ export function HistoryChart({
     tagLabels,
   });
   const showAvgLine = shouldShowAvgLine(avgLineMode, zoomRange);
-  const series = useHistoryChartSeries(lines, zoomRange.granulate, showAvgLine);
+  const series = useHistoryChartSeries(lines, zoomRange.granulate, avgLineMode, showAvgLine);
   const legendData = useMemo(() => lines.map((line) => line.label), [lines]);
   const loading = lines.some((line) => line.loading);
   const hasData = series.length > 0;

src/features/history-chart/HistoryChartArea.tsx

@@ -128,6 +128,7 @@ export function HistoryChartArea({
         </div>
       </div>
       <ReactEChartsCore
+        key={avgLineMode}
         ref={chartRef}
         echarts={echarts}
         option={option}

src/features/history-chart/chartTypes.ts

@@ -9,8 +9,6 @@ export type HistoryBucketValue = [
   max: number,
   count: number,
   slotMs: number,
-  previousTime: number | null,
-  previousAvg: number | null,
 ];
 
 export type AvgLineMode = 'auto' | 'show' | 'hide';

src/features/history-chart/historyChartAvgLineSeries.ts

@@ -0,0 +1,92 @@
+import type { LineSeriesOption, SeriesOption } from 'echarts';
+import type { HistoryPoint } from '../../entities/history/types';
+import { parseGranulateMs } from '../../utils/historyGranularity';
+import { SERIES_COLORS } from './historyChartSeries';
+
+type AvgLineSeriesValue = [time: number, avg: number, min: number, max: number, count: number, slotMs: number];
+type AvgLineSeriesPoint = AvgLineSeriesValue | null;
+
+function isFinitePoint(point: HistoryPoint): boolean {
+  return [point.avg_value, point.min_value, point.max_value].every(Number.isFinite);
+}
+
+function createAvgLineData(points: HistoryPoint[], granulate: string, breakOnGaps: boolean): AvgLineSeriesPoint[] {
+  const slotMs = parseGranulateMs(granulate);
+  const finitePoints = points.filter(isFinitePoint);
+
+  if (!breakOnGaps) {
+    return finitePoints.map((point) => [
+      new Date(point.time).getTime(),
+      point.avg_value,
+      point.min_value,
+      point.max_value,
+      point.point_count,
+      slotMs,
+    ]);
+  }
+
+  return finitePoints.flatMap((point, index) => {
+    const currentTime = new Date(point.time).getTime();
+    const currentPoint: AvgLineSeriesValue = [
+      currentTime,
+      point.avg_value,
+      point.min_value,
+      point.max_value,
+      point.point_count,
+      slotMs,
+    ];
+
+    if (index === 0) {
+      return [currentPoint];
+    }
+
+    const previousTime = new Date(finitePoints[index - 1].time).getTime();
+    const hasAcceptableGap = currentTime - previousTime <= slotMs * 100;
+
+    return hasAcceptableGap ? [currentPoint] : [null, currentPoint];
+  });
+}
+
+export function createAvgLineSeries(
+  points: HistoryPoint[],
+  index: number,
+  label: string,
+  granulate: string,
+  showAvgLine: boolean,
+  breakOnGaps: boolean,
+): SeriesOption[] {
+  if (!showAvgLine) {
+    return [];
+  }
+
+  const color = SERIES_COLORS[index % SERIES_COLORS.length];
+
+  return [
+    {
+      name: `${label} avg-line`,
+      type: 'line',
+      data: createAvgLineData(points, granulate, breakOnGaps),
+      encode: {
+        x: 0,
+        y: 1,
+      },
+      smooth: true,
+      connectNulls: false,
+      showSymbol: false,
+      symbol: 'none',
+      silent: true,
+      tooltip: {
+        show: false,
+      },
+      lineStyle: {
+        color,
+        width: 1.5,
+        opacity: 0.78,
+      },
+      emphasis: {
+        disabled: true,
+      },
+      z: 4,
+    } as LineSeriesOption,
+  ];
+}

src/features/history-chart/historyChartEcharts.ts

@@ -1,4 +1,4 @@
-import { CustomChart } from 'echarts/charts';
+import { CustomChart, LineChart } from 'echarts/charts';
 import {
   DataZoomComponent,
   GridComponent,
@@ -10,6 +10,7 @@ import { CanvasRenderer } from 'echarts/renderers';
 
 echarts.use([
   CustomChart,
+  LineChart,
   GridComponent,
   LegendComponent,
   TooltipComponent,

src/features/history-chart/historyChartSeries.ts

@@ -27,8 +27,6 @@ const BUCKET = {
   max: 3,
   count: 4,
   slotMs: 5,
-  previousTime: 6,
-  previousAvg: 7,
 } as const;
 
 type CartesianCoordSys = {
@@ -46,10 +44,6 @@ type BucketValues = {
   min: number;
   max: number;
   slotMs: number;
-  previousTime: number;
-  previousAvg: number;
-  previousTimeValue: unknown;
-  previousAvgValue: unknown;
 };
 
 /** Ограничивает число заданными границами, чтобы фигуры не выходили за canvas графика. */
@@ -75,56 +69,31 @@ function isFinitePoint(point: HistoryPoint): boolean {
   return [point.avg_value, point.min_value, point.max_value].every(Number.isFinite);
 }
 
-/** Упаковывает bucket и предыдущую avg-точку в tuple для custom series ECharts. */
+/** Упаковывает bucket в tuple для custom series ECharts. */
 function createBucketData(points: HistoryPoint[], slotMs: number): HistoryBucketValue[] {
   const finitePoints = points.filter(isFinitePoint);
 
-  return finitePoints.map((point, index) => {
-    const previousPoint = finitePoints[index - 1];
-
-    return [
+  return finitePoints.map((point) => [
       new Date(point.time).getTime(),
       point.avg_value,
       point.min_value,
       point.max_value,
       point.point_count,
       slotMs,
-      previousPoint ? new Date(previousPoint.time).getTime() : null,
-      previousPoint?.avg_value ?? null,
-    ];
-  });
+    ]);
 }
 
 /** Читает tuple bucket-а из ECharts API и возвращает значения с понятными именами. */
 function readBucketValues(api: CustomSeriesRenderItemAPI): BucketValues {
-  const previousTimeValue = api.value(BUCKET.previousTime);
-  const previousAvgValue = api.value(BUCKET.previousAvg);
-
   return {
     time: Number(api.value(BUCKET.time)),
     avg: Number(api.value(BUCKET.avg)),
     min: Number(api.value(BUCKET.min)),
     max: Number(api.value(BUCKET.max)),
     slotMs: Number(api.value(BUCKET.slotMs)),
-    previousTime: Number(previousTimeValue),
-    previousAvg: Number(previousAvgValue),
-    previousTimeValue,
-    previousAvgValue,
   };
 }
 
-/** Проверяет, можно ли рисовать соединительный отрезок к предыдущей avg-точке. */
-function hasPreviousAvg(values: BucketValues): boolean {
-  return (
-    values.previousTimeValue !== null &&
-    values.previousTimeValue !== undefined &&
-    values.previousAvgValue !== null &&
-    values.previousAvgValue !== undefined &&
-    Number.isFinite(values.previousTime) &&
-    Number.isFinite(values.previousAvg)
-  );
-}
-
 /** Считает пиксельные фигуры одного bucket-а и обрезает их по области графика. */
 function createBucketShapes(api: CustomSeriesRenderItemAPI, values: BucketValues, chartArea: ChartArea) {
   const avgPoint = api.coord([values.time, values.avg]);
@@ -155,30 +124,8 @@ function createBucketShapes(api: CustomSeriesRenderItemAPI, values: BucketValues
   };
 }
 
-/** Создает отрезок к предыдущей avg-точке, если режим соединительной линии включен. */
-function createAvgLineShape(
-  api: CustomSeriesRenderItemAPI,
-  values: BucketValues,
-  avgPoint: number[],
-  avgY: number,
-  chartArea: ChartArea,
-) {
-  if (!hasPreviousAvg(values)) {
-    return null;
-  }
-
-  const previousPoint = api.coord([values.previousTime, values.previousAvg]);
-
-  return {
-    x1: clamp(previousPoint[0], chartArea.x, chartArea.x + chartArea.width),
-    y1: clamp(previousPoint[1], chartArea.y, chartArea.y + chartArea.height),
-    x2: clamp(avgPoint[0], chartArea.x, chartArea.x + chartArea.width),
-    y2: clamp(avgY, chartArea.y, chartArea.y + chartArea.height),
-  };
-}
-
-/** Рисует один bucket: min..max слот, avg-маркер и опциональный отрезок к предыдущей avg-точке. */
-function renderBucket(color: string, showAvgLine: boolean) {
+/** Рисует один bucket: min..max слот и горизонтальный avg-маркер. */
+function renderBucket(color: string) {
   return (params: CustomSeriesRenderItemParams, api: CustomSeriesRenderItemAPI): CustomSeriesRenderItemReturn => {
     const values = readBucketValues(api);
 
@@ -190,10 +137,6 @@ function renderBucket(color: string, showAvgLine: boolean) {
       return null;
     }
 
-    // Avg-линия рисуется внутри той же custom-серии, чтобы не удваивать число ECharts-серий при зуме.
-    const lineShape = showAvgLine
-      ? createAvgLineShape(api, values, bucketShapes.avgPoint, bucketShapes.avgY, chartArea)
-      : null;
     const avgOffset = clamp(
       (bucketShapes.avgY - bucketShapes.rangeShape.y) / bucketShapes.rangeShape.height,
       0,
@@ -210,17 +153,6 @@ function renderBucket(color: string, showAvgLine: boolean) {
             fill: new graphic.LinearGradient(0, 0, 0, 1, createAvgGradientStops(color, avgOffset)),
           },
         },
-        ...(lineShape
-          ? [{
-              type: 'line' as const,
-              shape: lineShape,
-              style: {
-                stroke: color,
-                lineWidth: 1,
-                opacity: 0.72,
-              },
-            }]
-          : []),
         ...(bucketShapes.avgShape
           ? [{
               type: 'rect' as const,
@@ -235,13 +167,12 @@ function renderBucket(color: string, showAvgLine: boolean) {
   };
 }
 
-/** Создает одну custom-серию на тег: bucket-слоты и avg-линия живут в одном renderItem. */
+/** Создает bucket-серию на тег: min..max слот и горизонтальный avg-маркер. */
 export function createSeriesOptions(
   points: HistoryPoint[],
   index: number,
   label: string,
   granulate: string,
-  showAvgLine: boolean,
 ): SeriesOption[] {
   const color = SERIES_COLORS[index % SERIES_COLORS.length];
 
@@ -250,7 +181,7 @@ export function createSeriesOptions(
       name: label,
       type: 'custom',
       data: createBucketData(points, parseGranulateMs(granulate)),
-      renderItem: renderBucket(color, showAvgLine),
+      renderItem: renderBucket(color),
       encode: {
         x: BUCKET.time,
         y: [BUCKET.avg, BUCKET.min, BUCKET.max],

src/features/history-chart/useHistoryChartSeries.ts

@@ -1,18 +1,26 @@
 import { useMemo } from 'react';
 import type { SeriesOption } from 'echarts';
+import { createAvgLineSeries } from './historyChartAvgLineSeries';
 import { createSeriesOptions } from './historyChartSeries';
 import type { HistoryChartLineData } from './useHistoryChartQueries';
+import type { AvgLineMode } from './chartTypes';
 
 export function useHistoryChartSeries(
   lines: HistoryChartLineData[],
   granulate: string,
+  avgLineMode: AvgLineMode,
   showAvgLine: boolean,
 ): SeriesOption[] {
   return useMemo(
     () =>
       lines.flatMap((line) =>
-        line.rows.length ? createSeriesOptions(line.rows, line.index, line.label, granulate, showAvgLine) : [],
+        line.rows.length
+          ? [
+              ...createSeriesOptions(line.rows, line.index, line.label, granulate),
+              ...createAvgLineSeries(line.rows, line.index, line.label, granulate, showAvgLine, avgLineMode === 'auto'),
+            ]
+          : [],
       ),
-    [granulate, lines, showAvgLine],
+    [granulate, lines, showAvgLine, avgLineMode],
   );
 }