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|
package flamegraph
import (
"fmt"
"hash/fnv"
"image/color"
common "ior/internal/tui/common"
"math"
"sort"
"strings"
"unicode/utf8"
"charm.land/lipgloss/v2"
)
const pathSeparator = "\x1f"
const minFlameWidth = 60
// BuildTerminalLayout converts a live trie snapshot into terminal frame cells.
func BuildTerminalLayout(snapshot *snapshotNode, width, height int) []tuiFrame {
if snapshot == nil || width <= 0 || height <= 0 {
return nil
}
rootTotal := snapshotTotal(snapshot)
if rootTotal == 0 {
return nil
}
rootName := frameName(snapshot.Name, 0)
frames := make([]tuiFrame, 0, len(snapshot.Children)+1)
collectTerminalLayout(&frames, snapshot, rootTotal, width, height, 0, 0, rootName)
return frames
}
func collectTerminalLayout(out *[]tuiFrame, node *snapshotNode, rootTotal uint64, width, height, depth, col int, path string) {
if node == nil || depth >= height {
return
}
total := snapshotTotal(node)
frameWidth := int(math.Floor(float64(width) * (float64(total) / float64(rootTotal))))
if frameWidth < 1 {
return
}
name := frameName(node.Name, depth)
*out = append(*out, tuiFrame{
Name: name,
Col: col,
Row: depth,
Width: frameWidth,
Total: total,
Percent: 100 * float64(total) / float64(rootTotal),
Fill: terminalFrameColor(name),
Depth: depth,
Path: path,
})
cursor := col
for _, child := range node.Children {
childTotal := snapshotTotal(child)
childWidth := int(math.Floor(float64(width) * (float64(childTotal) / float64(rootTotal))))
if childWidth < 1 {
continue
}
childName := frameName(child.Name, depth+1)
childPath := strings.Join([]string{path, childName}, pathSeparator)
collectTerminalLayout(out, child, rootTotal, width, height, depth+1, cursor, childPath)
cursor += childWidth
}
}
func snapshotTotal(node *snapshotNode) uint64 {
if node == nil {
return 0
}
total := node.Value
for _, child := range node.Children {
total += snapshotTotal(child)
}
if node.Total > total {
return node.Total
}
return total
}
func frameName(name string, depth int) string {
if name != "" {
return name
}
if depth == 0 {
return "root"
}
return "(unknown)"
}
func terminalFrameColor(name string) color.Color {
hasher := fnv.New32a()
_, _ = hasher.Write([]byte(name))
h := hasher.Sum32()
return color.RGBA{
R: uint8(200 + int(h%35)),
G: uint8(80 + int((h>>8)%120)),
B: uint8(40 + int((h>>16)%90)),
A: 255,
}
}
// RenderTerminalView renders a terminal flamegraph viewport from laid out frames.
func RenderTerminalView(frames []tuiFrame, width, height, selectedIdx int) string {
if width < minFlameWidth {
return common.PanelStyle.Render("Flame: terminal too narrow (need >= 60 columns)")
}
if height < 3 {
return common.PanelStyle.Render("Flame: viewport too short")
}
if len(frames) == 0 {
return common.PanelStyle.Render("Flame: waiting for data...")
}
availableRows := height - 2 // toolbar + status
maxRow := maxFrameRow(frames)
rowOffset := 0
truncated := false
if maxRow+1 > availableRows {
rowOffset = maxRow + 1 - availableRows
truncated = true
}
if selectedIdx < 0 || selectedIdx >= len(frames) {
selectedIdx = 0
}
selected := frames[selectedIdx]
toolbar := fmt.Sprintf("Flame | frames:%d | rows:%d", len(frames), availableRows)
if truncated {
toolbar += " | showing deepest levels"
}
toolbar = padOrTrim(toolbar, width)
status := fmt.Sprintf("Selected: %s %.2f%% total=%d depth=%d", selected.Name, selected.Percent, selected.Total, selected.Depth)
status = padOrTrim(status, width)
rows := buildRenderRows(frames, width, rowOffset, maxRow, selected.Path)
var b strings.Builder
b.Grow((width + 1) * (len(rows) + 2))
b.WriteString(toolbar)
for _, row := range rows {
b.WriteString("\n")
b.WriteString(row)
}
b.WriteString("\n")
b.WriteString(status)
return b.String()
}
func buildRenderRows(frames []tuiFrame, width, rowOffset, maxRow int, selectedPath string) []string {
rowsByDepth := make(map[int][]tuiFrame)
for _, frame := range frames {
if frame.Row < rowOffset || frame.Row > maxRow {
continue
}
rowsByDepth[frame.Row] = append(rowsByDepth[frame.Row], frame)
}
rows := make([]string, 0, maxRow-rowOffset+1)
for row := maxRow; row >= rowOffset; row-- {
framesAtRow := rowsByDepth[row]
sort.Slice(framesAtRow, func(i, j int) bool {
return framesAtRow[i].Col < framesAtRow[j].Col
})
rows = append(rows, renderRow(framesAtRow, width, selectedPath))
}
return rows
}
func renderRow(frames []tuiFrame, width int, selectedPath string) string {
if len(frames) == 0 {
return strings.Repeat(" ", width)
}
var b strings.Builder
b.Grow(width + 8)
cursor := 0
for _, frame := range frames {
if frame.Col >= width {
continue
}
if frame.Col > cursor {
gap := frame.Col - cursor
b.WriteString(strings.Repeat(" ", gap))
cursor += gap
}
cellWidth := frame.Width
if frame.Col+cellWidth > width {
cellWidth = width - frame.Col
}
if cellWidth <= 0 {
continue
}
label := padOrTrim(frame.Name, cellWidth)
style := lipgloss.NewStyle().Width(cellWidth).Foreground(common.ColorBackground).Background(frame.Fill)
if frame.Path == selectedPath {
style = style.Bold(true).Underline(true)
}
cell := style.Render(label)
b.WriteString(cell)
cursor = frame.Col + cellWidth
}
if cursor < width {
b.WriteString(strings.Repeat(" ", width-cursor))
}
return b.String()
}
func maxFrameRow(frames []tuiFrame) int {
maxRow := 0
for _, frame := range frames {
if frame.Row > maxRow {
maxRow = frame.Row
}
}
return maxRow
}
func padOrTrim(s string, width int) string {
if width <= 0 {
return ""
}
if utf8.RuneCountInString(s) <= width {
return s + strings.Repeat(" ", width-utf8.RuneCountInString(s))
}
if width == 1 {
return "…"
}
r := []rune(s)
return string(r[:width-1]) + "…"
}
|
