switch to go-term-text to fix bad underflow for label rendering

1 files changed, 28 insertions, 0 deletions

diff --git a/vendor/github.com/MichaelMure/go-term-text/trim.go b/vendor/github.com/MichaelMure/go-term-text/trim.go
new file mode 100644
index 00000000..eaf2ca0c
--- /dev/null
+++ b/vendor/github.com/MichaelMure/go-term-text/trim.go
@@ -0,0 +1,28 @@
+package text
+
+import (
+	"strings"
+	"unicode"
+)
+
+// TrimSpace remove the leading and trailing whitespace while ignoring the
+// terminal escape sequences.
+// Returns the number of trimmed space on both side.
+func TrimSpace(line string) string {
+	cleaned, escapes := ExtractTermEscapes(line)
+
+	// trim left while counting
+	left := 0
+	trimmed := strings.TrimLeftFunc(cleaned, func(r rune) bool {
+		if unicode.IsSpace(r) {
+			left++
+			return true
+		}
+		return false
+	})
+
+	trimmed = strings.TrimRightFunc(trimmed, unicode.IsSpace)
+
+	escapes = OffsetEscapes(escapes, -left)
+	return ApplyTermEscapes(trimmed, escapes)
+}