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refactor(tui): unicode symbols from a single definition

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This commit is contained in:
Karol Broda
2025-12-20 19:29:16 +01:00
parent 99f1d95295
commit d7cf490ff5
3 changed files with 68 additions and 33 deletions
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2
internal/tui/helpers.go
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@@ -14,7 +14,7 @@ func truncate(s string, max int) string {
if max <= 2 {
return s[:max]
}
return s[:max-1] + "…"
return s[:max-1] + SymbolEllipsis
}
var ansiRegex = regexp.MustCompile(`\x1b\[[0-9;]*m`)

37
internal/tui/symbols.go Normal file
View File

@@ -0,0 +1,37 @@
package tui
// unicode symbols used throughout the TUI
const (
// indicators
SymbolSelected = string('\u25B8') // black right-pointing small triangle
SymbolWatched = string('\u2605') // black star
SymbolWarning = string('\u26A0') // warning sign
SymbolSuccess = string('\u2713') // check mark
SymbolError = string('\u2717') // ballot x
SymbolBullet = string('\u2022') // bullet
SymbolArrowRight = string('\u2192') // rightwards arrow
SymbolArrowLeft = string('\u2190') // leftwards arrow
SymbolArrowUp = string('\u2191') // upwards arrow
SymbolArrowDown = string('\u2193') // downwards arrow
SymbolRefresh = string('\u21BB') // clockwise open circle arrow
SymbolEllipsis = string('\u2026') // horizontal ellipsis
// box drawing rounded
BoxTopLeft = string('\u256D') // light arc down and right
BoxTopRight = string('\u256E') // light arc down and left
BoxBottomLeft = string('\u2570') // light arc up and right
BoxBottomRight = string('\u256F') // light arc up and left
BoxHorizontal = string('\u2500') // light horizontal
BoxVertical = string('\u2502') // light vertical
// box drawing connectors
BoxTeeDown = string('\u252C') // light down and horizontal
BoxTeeUp = string('\u2534') // light up and horizontal
BoxTeeRight = string('\u251C') // light vertical and right
BoxTeeLeft = string('\u2524') // light vertical and left
BoxCross = string('\u253C') // light vertical and horizontal
// misc
SymbolDash = string('\u2013') // en dash
)

62
internal/tui/view.go
View File

@@ -5,6 +5,8 @@ import (
"snitch/internal/collector"
"strings"
"time"
"github.com/mattn/go-runewidth"
)
func (m model) renderMain() string {
@@ -31,7 +33,7 @@ func (m model) renderTitle() string {
left := m.theme.Styles.Header.Render("snitch")
ago := time.Since(m.lastRefresh).Round(time.Millisecond * 100)
right := m.theme.Styles.Normal.Render(fmt.Sprintf("%d/%d connections ↻ %s", len(visible), total, formatDuration(ago)))
right := m.theme.Styles.Normal.Render(fmt.Sprintf("%d/%d connections %s %s", len(visible), total, SymbolRefresh, formatDuration(ago)))
w := m.safeWidth()
gap := w - len(stripAnsi(left)) - len(stripAnsi(right)) - 2
@@ -57,7 +59,7 @@ func (m model) renderFilters() string {
parts = append(parts, m.theme.Styles.Normal.Render("udp"))
}
parts = append(parts, m.theme.Styles.Border.Render("│"))
parts = append(parts, m.theme.Styles.Border.Render(BoxVertical))
if m.showListening {
parts = append(parts, m.theme.Styles.Success.Render("listen"))
@@ -80,9 +82,9 @@ func (m model) renderFilters() string {
left := " " + strings.Join(parts, " ")
sortLabel := sortFieldLabel(m.sortField)
sortDir := "↑"
sortDir := SymbolArrowUp
if m.sortReverse {
sortDir = "↓"
sortDir = SymbolArrowDown
}
var right string
@@ -122,7 +124,7 @@ func (m model) renderSeparator() string {
if w < 1 {
w = 76
}
line := " " + strings.Repeat("─", w)
line := " " + strings.Repeat(BoxHorizontal, w)
return m.theme.Styles.Border.Render(line) + "\n"
}
@@ -157,21 +159,21 @@ func (m model) renderRow(c collector.Connection, selected bool) string {
indicator := " "
if selected {
indicator = m.theme.Styles.Success.Render("▸ ")
indicator = m.theme.Styles.Success.Render(SymbolSelected + " ")
} else if m.isWatched(c.PID) {
indicator = m.theme.Styles.Watched.Render("★ ")
indicator = m.theme.Styles.Watched.Render(SymbolWatched + " ")
}
process := truncate(c.Process, cols.process)
if process == "" {
process = "–"
process = SymbolDash
}
port := fmt.Sprintf("%d", c.Lport)
proto := c.Proto
state := c.State
if state == "" {
state = "–"
state = SymbolDash
}
local := c.Laddr
@@ -273,7 +275,7 @@ func (m model) renderDetail() string {
b.WriteString("\n")
b.WriteString(" " + m.theme.Styles.Header.Render("connection details") + "\n")
b.WriteString(" " + m.theme.Styles.Border.Render(strings.Repeat("─", 40)) + "\n\n")
b.WriteString(" " + m.theme.Styles.Border.Render(strings.Repeat(BoxHorizontal, 40)) + "\n\n")
fields := []struct {
label string
@@ -293,7 +295,7 @@ func (m model) renderDetail() string {
for _, f := range fields {
val := f.value
if val == "" || val == "0" || val == ":0" {
val = "–"
val = SymbolDash
}
line := fmt.Sprintf(" %-12s %s\n", m.theme.Styles.Header.Render(f.label), val)
b.WriteString(line)
@@ -327,7 +329,7 @@ func (m model) renderKillModal() string {
// build modal content
var lines []string
lines = append(lines, "")
lines = append(lines, m.theme.Styles.Error.Render(" !! KILL PROCESS? "))
lines = append(lines, m.theme.Styles.Error.Render(" "+SymbolWarning+" KILL PROCESS? "))
lines = append(lines, "")
lines = append(lines, fmt.Sprintf(" process: %s", m.theme.Styles.Header.Render(processName)))
lines = append(lines, fmt.Sprintf(" pid: %s", m.theme.Styles.Header.Render(fmt.Sprintf("%d", c.PID))))
@@ -354,7 +356,7 @@ func (m model) overlayModal(background, modal string) string {
// find max modal line width using runewidth for proper unicode handling
modalWidth := 0
for _, line := range modalLines {
w := runeWidth(stripAnsi(line))
w := stringWidth(line)
if w > modalWidth {
modalWidth = w
}
@@ -385,14 +387,14 @@ func (m model) overlayModal(background, modal string) string {
// helper to build a line with modal overlay
buildLine := func(bgLine, modalContent string) string {
modalVisibleWidth := runeWidth(stripAnsi(modalContent))
modalVisibleWidth := stringWidth(modalContent)
endCol := startCol + modalVisibleWidth
leftBg := visibleSubstring(bgLine, 0, startCol)
rightBg := visibleSubstring(bgLine, endCol, m.width)
// pad left side if needed
leftLen := runeWidth(stripAnsi(leftBg))
leftLen := stringWidth(leftBg)
if leftLen < startCol {
leftBg = leftBg + strings.Repeat(" ", startCol-leftLen)
}
@@ -403,7 +405,7 @@ func (m model) overlayModal(background, modal string) string {
// draw top border
borderRow := startRow - 1
if borderRow >= 0 && borderRow < len(result) {
border := m.theme.Styles.Border.Render("╭" + strings.Repeat("─", modalWidth) + "╮")
border := m.theme.Styles.Border.Render(BoxTopLeft + strings.Repeat(BoxHorizontal, modalWidth) + BoxTopRight)
result[borderRow] = buildLine(result[borderRow], border)
}
@@ -412,11 +414,11 @@ func (m model) overlayModal(background, modal string) string {
row := startRow + i
if row >= 0 && row < len(result) {
content := line
padding := modalWidth - runeWidth(stripAnsi(line))
padding := modalWidth - stringWidth(line)
if padding > 0 {
content = line + strings.Repeat(" ", padding)
}
boxedLine := m.theme.Styles.Border.Render("│") + content + m.theme.Styles.Border.Render("│")
boxedLine := m.theme.Styles.Border.Render(BoxVertical) + content + m.theme.Styles.Border.Render(BoxVertical)
result[row] = buildLine(result[row], boxedLine)
}
}
@@ -424,16 +426,16 @@ func (m model) overlayModal(background, modal string) string {
// draw bottom border
bottomRow := startRow + modalHeight
if bottomRow >= 0 && bottomRow < len(result) {
border := m.theme.Styles.Border.Render("╰" + strings.Repeat("─", modalWidth) + "╯")
border := m.theme.Styles.Border.Render(BoxBottomLeft + strings.Repeat(BoxHorizontal, modalWidth) + BoxBottomRight)
result[bottomRow] = buildLine(result[bottomRow], border)
}
return strings.Join(result, "\n")
}
// runeWidth returns the display width of a string (assumes standard terminal chars)
func runeWidth(s string) int {
return len([]rune(s))
// stringWidth returns the display width of a string excluding ANSI codes
func stringWidth(s string) int {
return runewidth.StringWidth(stripAnsi(s))
}
// visibleSubstring extracts a substring by visible column positions, preserving ANSI codes
@@ -445,23 +447,18 @@ func visibleSubstring(s string, start, end int) string {
var result strings.Builder
visiblePos := 0
inEscape := false
runes := []rune(s)
for i := 0; i < len(runes); i++ {
r := runes[i]
for _, r := range s {
// detect start of ANSI escape sequence
if r == '\x1b' && i+1 < len(runes) && runes[i+1] == '[' {
if r == '\x1b' {
inEscape = true
// always include ANSI codes so colors carry over
result.WriteRune(r)
continue
}
if inEscape {
// include escape sequence characters
result.WriteRune(r)
// check for end of escape sequence (letter)
// end of escape sequence is a letter
if (r >= 'A' && r <= 'Z') || (r >= 'a' && r <= 'z') {
inEscape = false
}
@@ -469,10 +466,11 @@ func visibleSubstring(s string, start, end int) string {
}
// regular visible character
if visiblePos >= start && visiblePos < end {
w := runewidth.RuneWidth(r)
if visiblePos >= start && visiblePos+w <= end {
result.WriteRune(r)
}
visiblePos++
visiblePos += w
if visiblePos >= end {
break