init: pristine aerc 0.20.0 source

lib/ui/text.go

@@ -0,0 +1,54 @@
+package ui
+
+import (
+	"git.sr.ht/~rockorager/vaxis"
+	"github.com/mattn/go-runewidth"
+)
+
+const (
+	TEXT_LEFT   = iota
+	TEXT_CENTER = iota
+	TEXT_RIGHT  = iota
+)
+
+type Text struct {
+	text     string
+	strategy uint
+	style    vaxis.Style
+}
+
+func NewText(text string, style vaxis.Style) *Text {
+	return &Text{
+		text:  text,
+		style: style,
+	}
+}
+
+func (t *Text) Text(text string) *Text {
+	t.text = text
+	t.Invalidate()
+	return t
+}
+
+func (t *Text) Strategy(strategy uint) *Text {
+	t.strategy = strategy
+	t.Invalidate()
+	return t
+}
+
+func (t *Text) Draw(ctx *Context) {
+	size := runewidth.StringWidth(t.text)
+	x := 0
+	if t.strategy == TEXT_CENTER {
+		x = (ctx.Width() - size) / 2
+	}
+	if t.strategy == TEXT_RIGHT {
+		x = ctx.Width() - size
+	}
+	ctx.Fill(0, 0, ctx.Width(), ctx.Height(), ' ', t.style)
+	ctx.Printf(x, 0, t.style, "%s", t.text)
+}
+
+func (t *Text) Invalidate() {
+	Invalidate()
+}