feat(ui): export TruncateText helper

Wrap the existing truncateText logic used by toast rendering so later
tab-title work can reuse the same cell-width clipping.

commit: b40aa09e134e11bbb40c1fcdff3b09d3709a3648
author: brice · 3mo ago · 2026-07-11 07:55 UTC
parent: d0ab56b
signature: GPG VerifiedCD88F9E564E0102646FB6077A1A07C7C7C3E349D · arch-gpg Verified for the committer email

2 files · +27 -0

M internal/usecase/ui/toast.go +3 -0


@@ -223,6 +223,9 @@ func drawToast(frame renderer.Frame, toast Toast, styles ToastStyles) {
223	223		DrawText(frame, textLeft, textY, textRight, truncateText(toast.Message, textRight-textLeft), styles.Text)
224	224		}
225	225
	226	+	// TruncateText clips text to maxWidth cells, appending an ellipsis when cut.
	227	+	func TruncateText(text string, maxWidth int) string { return truncateText(text, maxWidth) }
	228	+
226	229		func truncateText(text string, maxWidth int) string {
227	230		if maxWidth <= 0 {
228	231		return ""


@@ -223,6 +223,9 @@ func drawToast(frame renderer.Frame, toast Toast, styles ToastStyles) {
223	DrawText(frame, textLeft, textY, textRight, truncateText(toast.Message, textRight-textLeft), styles.Text)	223		DrawText(frame, textLeft, textY, textRight, truncateText(toast.Message, textRight-textLeft), styles.Text)
224	}	224		}
225		225
		226	+	// TruncateText clips text to maxWidth cells, appending an ellipsis when cut.
		227	+	func TruncateText(text string, maxWidth int) string { return truncateText(text, maxWidth) }
		228	+
226	func truncateText(text string, maxWidth int) string {	229		func truncateText(text string, maxWidth int) string {
227	if maxWidth <= 0 {	230		if maxWidth <= 0 {
228	return ""	231		return ""

M internal/usecase/ui/toast_test.go +24 -0


@@ -81,6 +81,30 @@ func TestToastManagerDurationDismissAndClear(t *testing.T) {
81	81		})
82	82		}
83	83
	84	+	func TestTruncateText(t *testing.T) {
	85	+	tests := []struct {
	86	+	name string
	87	+	text string
	88	+	maxWidth int
	89	+	want string
	90	+	}{
	91	+	{"no truncation needed", "hello", 10, "hello"},
	92	+	{"truncation with ellipsis", "hello world", 8, "hello w…"},
	93	+	{"maxWidth zero", "hello", 0, ""},
	94	+	// The ellipsis itself is one cell wide, so any non-positive maxWidth is
	95	+	// also "smaller than the ellipsis" and collapses to the same empty result.
	96	+	{"maxWidth smaller than ellipsis", "hello world", -1, ""},
	97	+	{"wide runes", "日本語のテキスト", 5, "日本…"},
	98	+	}
	99	+	for _, tt := range tests {
	100	+	t.Run(tt.name, func(t *testing.T) {
	101	+	if got := TruncateText(tt.text, tt.maxWidth); got != tt.want {
	102	+	t.Fatalf("TruncateText(%q, %d) = %q, want %q", tt.text, tt.maxWidth, got, tt.want)
	103	+	}
	104	+	})
	105	+	}
	106	+	}
	107	+
84	108		func TestToastBoundsAnchorsMarginsAndTinyFrames(t *testing.T) {
85	109		message := "Reconnection attempts…"
86	110		width := textWidth(message) + 4


@@ -81,6 +81,30 @@ func TestToastManagerDurationDismissAndClear(t *testing.T) {
81	})	81		})
82	}	82		}
83		83
		84	+	func TestTruncateText(t *testing.T) {
		85	+	tests := []struct {
		86	+	name string
		87	+	text string
		88	+	maxWidth int
		89	+	want string
		90	+	}{
		91	+	{"no truncation needed", "hello", 10, "hello"},
		92	+	{"truncation with ellipsis", "hello world", 8, "hello w…"},
		93	+	{"maxWidth zero", "hello", 0, ""},
		94	+	// The ellipsis itself is one cell wide, so any non-positive maxWidth is
		95	+	// also "smaller than the ellipsis" and collapses to the same empty result.
		96	+	{"maxWidth smaller than ellipsis", "hello world", -1, ""},
		97	+	{"wide runes", "日本語のテキスト", 5, "日本…"},
		98	+	}
		99	+	for _, tt := range tests {
		100	+	t.Run(tt.name, func(t *testing.T) {
		101	+	if got := TruncateText(tt.text, tt.maxWidth); got != tt.want {
		102	+	t.Fatalf("TruncateText(%q, %d) = %q, want %q", tt.text, tt.maxWidth, got, tt.want)
		103	+	}
		104	+	})
		105	+	}
		106	+	}
		107	+
84	func TestToastBoundsAnchorsMarginsAndTinyFrames(t *testing.T) {	108		func TestToastBoundsAnchorsMarginsAndTinyFrames(t *testing.T) {
85	message := "Reconnection attempts…"	109		message := "Reconnection attempts…"
86	width := textWidth(message) + 4	110		width := textWidth(message) + 4