2 files changed, 97 insertions, 0 deletions
diff --git a/internal/color/color.go b/internal/color/color.go
index dcbb280..22fa143 100644
--- a/internal/color/color.go
+++ b/internal/color/color.go
@@ -180,6 +180,48 @@ func VisibleLen(s string) int {
 	return utf8.RuneCountInString(ansiRe.ReplaceAllString(s, ""))
 }
 
+// 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
+// preserved. Only over-long lines are word-wrapped. The result is joined with
+// "\r\n". A width <= 0 disables wrapping.
+func WrapANSI(s string, width int) string {
+	if width <= 0 {
+		return s
+	}
+	var out []string
+	for _, line := range strings.Split(s, "\n") {
+		line = strings.TrimRight(line, "\r")
+		out = append(out, wrapLine(line, width)...)
+	}
+	return strings.Join(out, "\r\n")
+}
+
+func wrapLine(line string, width int) []string {
+	if VisibleLen(line) <= width {
+		return []string{line}
+	}
+	words := strings.Fields(line)
+	if len(words) == 0 {
+		return []string{line}
+	}
+	cur := words[0]
+	curWidth := VisibleLen(words[0])
+	var lines []string
+	for _, w := range words[1:] {
+		ww := VisibleLen(w)
+		if curWidth+1+ww <= width {
+			cur += " " + w
+			curWidth += 1 + ww
+		} else {
+			lines = append(lines, cur)
+			cur = w
+			curWidth = ww
+		}
+	}
+	return append(lines, cur)
+}
+
 func ContrastFg(mode string, bgIndex int) string {
 	r, g, b := Xterm256ToRGB(bgIndex)
 	if r+g+b > 384 {
diff --git a/internal/color/color_test.go b/internal/color/color_test.go
new file mode 100644
index 0000000..c1f5e5b
--- /dev/null
+++ b/internal/color/color_test.go
@@ -0,0 +1,55 @@
+package color
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestWrapANSIDisabled(t *testing.T) {
+	s := "this is a very long line that would normally be wrapped if enabled"
+	if got := WrapANSI(s, 0); got != s {
+		t.Errorf("WrapANSI(_, 0) = %q, want unchanged", got)
+	}
+}
+
+func TestWrapANSIShortLineUntouched(t *testing.T) {
+	s := "    indented menu item"
+	if got := WrapANSI(s, 80); got != s {
+		t.Errorf("short line was modified: got %q, want %q", got, s)
+	}
+}
+
+func TestWrapANSIWrapsLongLine(t *testing.T) {
+	s := "alpha bravo charlie delta echo foxtrot golf hotel india juliet"
+	got := WrapANSI(s, 20)
+	lines := strings.Split(got, "\r\n")
+	if len(lines) < 2 {
+		t.Fatalf("expected multiple lines, got %d: %q", len(lines), got)
+	}
+	for _, l := range lines {
+		if VisibleLen(l) > 20 {
+			t.Errorf("line exceeds width: %q (%d)", l, VisibleLen(l))
+		}
+	}
+	if strings.Join(strings.Fields(got), " ") != s {
+		t.Errorf("words not preserved: %q", got)
+	}
+}
+
+func TestWrapANSIIgnoresColorCodes(t *testing.T) {
+	colored := FgCode("xterm256", 182) + "hello world" + Reset
+	if VisibleLen(colored) > 80 {
+		t.Fatalf("test setup wrong, visible len = %d", VisibleLen(colored))
+	}
+	if got := WrapANSI(colored, 80); got != colored {
+		t.Errorf("colored line within width was wrapped: %q", got)
+	}
+}
+
+func TestWrapANSISplitsOnNewlines(t *testing.T) {
+	got := WrapANSI("first line\nsecond line", 80)
+	want := "first line\r\nsecond line"
+	if got != want {
+		t.Errorf("WrapANSI newline handling = %q, want %q", got, want)
+	}
+}