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feat: Colorize trace timeline #26

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merged 1 commit into from
Apr 6, 2024
Merged

feat: Colorize trace timeline #26

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29 changes: 25 additions & 4 deletions tuiexporter/internal/tui/component/timeline.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,20 @@ const (
TIMELINE_TREE_TITLE = "Details (d)"
)

var colors = []tcell.Color{
// https://color.adobe.com/[otel-tui]-Span-Color-Theme-color-theme-08c8f7c5-7b93-4936-ae75-8f91fc045fd5
tcell.ColorAliceBlue,
tcell.ColorBurlyWood,
tcell.ColorCadetBlue,
tcell.ColorCoral,
tcell.ColorCornsilk,
tcell.ColorGold,
tcell.ColorLightBlue,
tcell.ColorLightGreen,
tcell.ColorLemonChiffon,
tcell.ColorMediumTurquoise,
}

type spanTreeNode struct {
span *telemetry.SpanData
label string
Expand Down Expand Up @@ -214,6 +228,7 @@ func newSpanTree(traceID string, cache *telemetry.TraceCache) (rootNodes []*span

// store memo and calculate start and end time of the trace
spanMemo := make(map[string]int)
colorMemo := make(map[string]tcell.Color)
nodes := []*spanTreeNode{}
for idx, span := range spans {
nodes = append(nodes, &spanTreeNode{span: span})
Expand All @@ -224,16 +239,22 @@ func newSpanTree(traceID string, cache *telemetry.TraceCache) (rootNodes []*span
if span.Span.EndTimestamp().AsTime().After(end) {
end = span.Span.EndTimestamp().AsTime()
}
// color is assigned by the service name
sname, _ := span.ResourceSpan.Resource().Attributes().Get("service.name")
if _, ok := colorMemo[sname.AsString()]; !ok {
colorMemo[sname.AsString()] = colors[len(colorMemo)%len(colors)]
}
}
duration = end.Sub(start)

// generate span tree
for _, span := range spans {
current := span.Span.SpanID().String()
node := nodes[spanMemo[current]]
sname, _ := span.ResourceSpan.Resource().Attributes().Get("service.name")
st, en := span.Span.StartTimestamp().AsTime().Sub(start), span.Span.EndTimestamp().AsTime().Sub(start)
d := en - st
node.box = createSpan(duration, st, en)
node.box = createSpan(colorMemo[sname.AsString()], duration, st, en)
node.label = fmt.Sprintf("%s %s", span.Span.Name(), d.String())

parent := span.Span.ParentSpanID().String()
Expand Down Expand Up @@ -277,7 +298,7 @@ func getXByRatio(ratio float64, width int) int {
return int(float64(width) * ratio)
}

func createSpan(total, start, end time.Duration) (span *tview.Box) {
func createSpan(color tcell.Color, total, start, end time.Duration) (span *tview.Box) {
return tview.NewBox().SetBorder(false).
SetDrawFunc(func(screen tcell.Screen, x, y, width, height int) (int, int, int, int) {
// Draw a horizontal line across the middle of the box.
Expand All @@ -287,10 +308,10 @@ func createSpan(total, start, end time.Duration) (span *tview.Box) {
s := x + getXByRatio(sRatio, width)
e := x + getXByRatio(eRatio, width)
if s == e {
screen.SetContent(s, centerY, tview.BoxDrawingsHeavyVertical, nil, tcell.StyleDefault.Foreground(tcell.ColorWhite))
screen.SetContent(s, centerY, tview.BoxDrawingsHeavyVertical, nil, tcell.StyleDefault.Foreground(color))
} else {
for cx := s; cx < e; cx++ {
screen.SetContent(cx, centerY, tview.BlockMediumShade, nil, tcell.StyleDefault.Foreground(tcell.ColorWhite))
screen.SetContent(cx, centerY, tview.BlockMediumShade, nil, tcell.StyleDefault.Foreground(color))
}
}

Expand Down
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