smoothing with step trimming

Author: lakshith-403

app/ui/src/components/charts/lines/plot.ts

@@ -89,7 +89,7 @@ export class LinePlot {
             })
         })
 
-        if (this.series.length == 1) {
+        if (this.series.length == 1) { // allways render circle for single point
             this.renderCircle(0)
         }
     }

app/ui/src/components/charts/spark_lines/chart.ts

@@ -56,7 +56,7 @@ export class SparkLines {
         const margin = Math.floor(opt.width / 64)
         this.rowWidth = Math.min(450, opt.width - Math.max(3 * margin, 60))
 
-        this.stepExtent = getExtent(this.currentSeries.concat(this.baseSeries).map(s => s.series), d => d.step)
+        this.stepExtent = getExtent(this.currentSeries.concat(this.baseSeries).map(s => s.trimmedSeries), d => d.step)
 
         this.chartColors = new ChartColors({nColors: this.uniqueItems.size, secondNColors: this.uniqueItems.size, isDivergent: opt.isDivergent})
     }
@@ -82,7 +82,7 @@ export class SparkLines {
                 }
                 let sparkLine = new SparkLine({
                     name: s.name,
-                    series: s.series,
+                    series: s.trimmedSeries,
                     selected: this.currentPlotIdx[i],
                     stepExtent: this.stepExtent,
                     width: this.rowWidth,
@@ -105,7 +105,7 @@ export class SparkLines {
                 }
                 let sparkLine = new SparkLine({
                     name: s.name,
-                    series: s.series,
+                    series: s.trimmedSeries,
                     selected: this.basePlotIdx[i],
                     stepExtent: this.stepExtent,
                     width: this.rowWidth,

app/ui/src/components/charts/utils.ts

@@ -255,8 +255,22 @@ export function trimSteps(series: Indicator[], min: number, max: number, smoothR
         s.highTrimIndex = maxIndex
 
         if (s.lowTrimIndex > s.highTrimIndex) { // if trim covers all just give the middle value
-            s.lowTrimIndex = s.series.length / 2
-            s.highTrimIndex = s.series.length / 2
+            localMax = max == -1 ? s.series[s.series.length - 1].step : max
+            localMin = min == -1 ? s.series[0].step : min
+
+            minIndex = s.series.length - 1
+            maxIndex = 0
+
+            for (let i = 0; i < s.series.length; i++) {
+                let p = s.series[i]
+                if (p.step >= localMin && p.step <= localMax) {
+                    minIndex = Math.min(i, minIndex)
+                    maxIndex = Math.max(i, maxIndex)
+                }
+            }
+
+            s.lowTrimIndex = (minIndex + maxIndex) / 2
+            s.highTrimIndex = (minIndex + maxIndex) / 2
         }
     })
 }