From d1063642093e112069ed7b54ec80391bc1b0851f Mon Sep 17 00:00:00 2001
From: dmkokovtsev <dmkokovtsev@devexperts.com>
Date: Tue, 3 Oct 2023 13:30:42 +0300
Subject: [PATCH] fix: errors in XAxisTimeLabelsGenerator after prepending
 candles

---
 src/chart/components/chart/chart-base.model.ts  | 1 +
 src/chart/components/chart/chart.model.ts       | 1 +
 src/chart/components/x_axis/x-axis.component.ts | 6 +++---
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/chart/components/chart/chart-base.model.ts b/src/chart/components/chart/chart-base.model.ts
index d160c91f..7dc12255 100644
--- a/src/chart/components/chart/chart-base.model.ts
+++ b/src/chart/components/chart/chart-base.model.ts
@@ -18,6 +18,7 @@ type DataPoint<T extends BaseType> = T extends 'candle' ? Candle : DataSeriesPoi
 type VisualPoint<T extends BaseType> = T extends 'candle' ? VisualCandle : VisualSeriesPoint;
 export interface PrependedCandlesData {
 	prependedCandlesWidth: number;
+	prependedCandlesCount: number;
 	preparedCandles: Candle[];
 }
 
diff --git a/src/chart/components/chart/chart.model.ts b/src/chart/components/chart/chart.model.ts
index 0d29f9ac..870d5bdb 100755
--- a/src/chart/components/chart/chart.model.ts
+++ b/src/chart/components/chart/chart.model.ts
@@ -389,6 +389,7 @@ export class ChartModel extends ChartBaseElement {
 		this.scale.moveXStart(this.scale.xStart + prependedCandlesWidth);
 		this.candlesPrependSubject.next({
 			prependedCandlesWidth,
+			prependedCandlesCount: updateResult.prepended,
 			preparedCandles,
 		});
 
diff --git a/src/chart/components/x_axis/x-axis.component.ts b/src/chart/components/x_axis/x-axis.component.ts
index bd46677f..dd4ddd32 100644
--- a/src/chart/components/x_axis/x-axis.component.ts
+++ b/src/chart/components/x_axis/x-axis.component.ts
@@ -120,11 +120,11 @@ export class XAxisComponent extends ChartBaseElement {
 		this.addRxSubscription(
 			this.chartComponent.chartModel.candlesPrependSubject
 				.pipe(
-					filter(({ preparedCandles }) => preparedCandles.length !== 0),
-					map(({ preparedCandles }) => {
+					filter(({ prependedCandlesCount }) => prependedCandlesCount !== 0),
+					map(({ prependedCandlesCount }) => {
 						return this.chartComponent.chartModel.mainCandleSeries.visualPoints.slice(
 							0,
-							preparedCandles.length,
+							prependedCandlesCount,
 						);
 					}),
 				)