tui/draw_buffer.go

package tui

import (
	"github.com/gdamore/tcell"
)

func drawBuffer(scr tcell.Screen, buf *ViewBuffer) {
	// buf.ForEach(func(x, y int, rn Rune) {
	// 	scr.SetContent(x, y, rn.Rn, nil, rn.Style)
	// })

	// TODO use runewidth.RuneWidth(rn)?
	buf.ForEachLine(func(y int, content []Rune) {
		for x := 0; x < buf.Width(); x++ {
			rn := content[x]
			if rn.Rn >= '─' && rn.Rn <= '╿' {
				scr.SetContent(x, y, rn.Rn, []rune{content[x+1].Rn}, rn.Style)
				x++
			} else {
				scr.SetContent(x, y, rn.Rn, nil, rn.Style)
			}
		}
	})

	scr.Show()
}

func truncateBuffer(buf *ViewBuffer, w, h int) *ViewBuffer {
	if w < 0 {
		w = buf.Width()
	}
	if h < 0 {
		h = buf.Height()
	}
	return buf.Sub(0, 0, w, h)
}