Git: components 301-320

ansi_text.go

@@ -0,0 +1,67 @@
+package mujica
+
+import (
+	"strings"
+
+	"github.com/egoist/mygo/ui"
+
+	"mujicaui/internal"
+	"mujicaui/theme"
+)
+
+// AnsiTextOptions configure an AnsiText.
+type AnsiTextOptions struct {
+	// Wrap breaks long lines at the width.
+	Wrap bool
+}
+
+// AnsiText renders terminal output with its SGR styles.
+func AnsiText(c *ui.Context, text string, opts AnsiTextOptions) *ui.Element {
+	k := Tokens(c)
+	col := ui.Column(c).Font(theme.MonoFont).TextColor(k.Text).Shrink(0)
+	col.Children(func() {
+		var st internal.AnsiStyle
+		for _, line := range strings.Split(text, "\n") {
+			var spans []internal.AnsiSpan
+			spans, st = internal.ParseAnsi(line, st)
+			out := make([]ui.Span, 0, len(spans))
+			for _, s := range spans {
+				out = append(out, ansiTextSpan(k, s))
+			}
+			if len(out) == 0 {
+				out = append(out, ui.Span{Text: " "})
+			}
+			t := ui.RichText(c, out...)
+			if !opts.Wrap {
+				t.NoWrap()
+			}
+		}
+	})
+	return col
+}
+
+// ansiTextSpan maps one parsed span onto theme-readable colors.
+func ansiTextSpan(k theme.Tokens, s internal.AnsiSpan) ui.Span {
+	fg, hasFG := internal.AnsiResolve(k.Dark, s.Style.FG)
+	if !hasFG {
+		fg = k.Text
+	}
+	bg, hasBG := internal.AnsiResolve(k.Dark, s.Style.BG)
+	if s.Style.Inverse {
+		if !hasBG {
+			bg = k.Surface
+		}
+		fg, bg, hasBG = bg, fg, true
+	}
+	if s.Style.Dim {
+		fg = fg.Mix(k.Surface, 0.4)
+	}
+	out := ui.Span{Text: s.Text, Color: fg, Italic: s.Style.Italic, Underline: s.Style.Underline, Strikethrough: s.Style.Strike}
+	if s.Style.Bold {
+		out.Weight = 700
+	}
+	if hasBG {
+		out.Background = bg
+	}
+	return out
+}