allow viewport to wrap lines

viewport/viewport.go

@@ -5,6 +5,7 @@ import (
 	"strings"
 
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/muesli/reflow/wordwrap"
 )
 
 const (
@@ -34,6 +35,9 @@ type Model struct {
 	// which is usually via the alternate screen buffer.
 	HighPerformanceRendering bool
 
+	// Wrap toggles whether the viewport should wrap lines or not.
+	Wrap bool
+
 	lines []string
 }
 
@@ -70,6 +74,11 @@ func (m Model) ScrollPercent() float64 {
 // Sync command should also be called.
 func (m *Model) SetContent(s string) {
 	s = strings.ReplaceAll(s, "\r\n", "\n") // normalize line endings
+
+	if m.Wrap {
+		s = wordwrap.String(s, m.Width)
+	}
+
 	m.lines = strings.Split(s, "\n")
 
 	if m.YOffset > len(m.lines)-1 {