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

1 files changed, 45 insertions, 0 deletions

diff --git a/vendor/github.com/MichaelMure/go-term-text/len.go b/vendor/github.com/MichaelMure/go-term-text/len.go
new file mode 100644
index 00000000..c6bcaeac
--- /dev/null
+++ b/vendor/github.com/MichaelMure/go-term-text/len.go
@@ -0,0 +1,45 @@
+package text
+
+import (
+	"strings"
+
+	"github.com/mattn/go-runewidth"
+)
+
+// Len return the length of a string in a terminal, while ignoring the terminal
+// escape sequences.
+func Len(text string) int {
+	length := 0
+	escape := false
+
+	for _, char := range text {
+		if char == '\x1b' {
+			escape = true
+		}
+		if !escape {
+			length += runewidth.RuneWidth(char)
+		}
+		if char == 'm' {
+			escape = false
+		}
+	}
+
+	return length
+}
+
+// MaxLineLen return the length in a terminal of the longest line, while
+// ignoring the terminal escape sequences.
+func MaxLineLen(text string) int {
+	lines := strings.Split(text, "\n")
+
+	max := 0
+
+	for _, line := range lines {
+		length := Len(line)
+		if length > max {
+			max = length
+		}
+	}
+
+	return max
+}