wrap_width and table improvements, targeting 80 character default width

1 files changed, 31 insertions, 0 deletions

diff --git a/internal/color/color.go b/internal/color/color.go
index e971382..5a1aa54 100644
--- a/internal/color/color.go
+++ b/internal/color/color.go
@@ -180,6 +180,37 @@ func VisibleLen(s string) int {
 	return utf8.RuneCountInString(ansiRe.ReplaceAllString(s, ""))
 }
 
+// TruncateVisible truncates s to at most maxVisible visible characters,
+// preserving ANSI SGR codes. Assumes cells follow the common pattern
+// "\x1b[...mTEXT\x1b[0m" or are plain text. Appends "..." when truncated.
+func TruncateVisible(s string, maxVisible int) string {
+	if maxVisible < 3 {
+		maxVisible = 3
+	}
+	if VisibleLen(s) <= maxVisible {
+		return s
+	}
+	var pre, suf string
+	rest := s
+	if idx := strings.IndexByte(rest, 'm'); idx >= 0 && strings.HasPrefix(rest, "\x1b[") {
+		pre = rest[:idx+1]
+		rest = rest[idx+1:]
+	}
+	if strings.HasSuffix(rest, Reset) {
+		suf = Reset
+		rest = rest[:len(rest)-len(Reset)]
+	}
+	runes := []rune(rest)
+	budget := maxVisible - 3
+	if budget < 0 {
+		budget = 0
+	}
+	if len(runes) > budget {
+		rest = string(runes[:budget]) + "..."
+	}
+	return pre + rest + suf
+}
+
 // WrapANSI wraps text to the given visible width, ignoring ANSI color codes
 // when measuring. Each input line (split on "\n") is handled on its own: a line
 // that already fits is returned untouched, so indentation and aligned UI are