After commit c018f5fd29 Fenrir is being switched over to go. If you do not want to be part of the testing process, please switch to master.

internal/presentation/attributes.go

@@ -0,0 +1,72 @@
+// Copyright (c) 2026 Storm Dragon
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package presentation
+
+import (
+	"fmt"
+	"git.stormux.org/storm/fenrir/internal/i18n"
+	"git.stormux.org/storm/fenrir/internal/screen"
+	"strings"
+)
+
+// Default_attribute_format is Python Fenrir's default, including its tokens.
+const Default_attribute_format = "Background fenrirBGColor,Foreground fenrirFGColor,fenrirUnderline,fenrirBold,fenrirBlink, Font fenrirFont,Fontsize fenrirFontSize"
+
+func attribute_color(color uint32, background bool) string {
+	if color == screen.ColorDefault {
+		return i18n.T("default")
+	}
+	if color&screen.ColorIndexed == 0 {
+		return fmt.Sprintf("#%06x", color)
+	}
+	index := color &^ screen.ColorIndexed
+	names := []string{"black", "red", "green", "brown/yellow", "blue", "magenta", "cyan", "light gray", "dark gray", "light red", "light green", "light yellow", "light blue", "light magenta", "light cyan", "white"}
+	if index < 16 {
+		if background && index == 7 {
+			return i18n.T("white")
+		}
+		return i18n.T(names[index])
+	}
+	// xterm's fixed 256-color cube and grayscale, without approximate names.
+	if index < 232 {
+		level := []uint32{0, 95, 135, 175, 215, 255}
+		index -= 16
+		return fmt.Sprintf("#%02x%02x%02x", level[index/36], level[index/6%6], level[index%6])
+	}
+	value := 8 + 10*(index-232)
+	return fmt.Sprintf("#%02x%02x%02x", value, value, value)
+}
+
+// Format_attributes substitutes the Python tokens. Font metadata is not
+// available from either backend; default means unspecified, not a detected font.
+func Format_attributes(attribute screen.Attribute, format string) string {
+	pairs := []string{"fenrirFGColor", attribute_color(attribute.Foreground, false), "fenrirBGColor", attribute_color(attribute.Background, true), "fenrirFontSize", i18n.T("default"), "fenrirFont", i18n.T("default")}
+	for _, style := range []struct {
+		token, text string
+		mask        uint32
+	}{
+		{"fenrirBold", "bold", screen.Bold}, {"fenrirItalics", "italic", screen.Italic},
+		{"fenrirUnderline", "underline", screen.Underline}, {"fenrirStrikethrough", "strikethrough", screen.Strike},
+		{"fenrirReverse", "reverse", screen.Reverse}, {"fenrirBlink", "blink", screen.Blink},
+	} {
+		text := ""
+		if attribute.Style&style.mask != 0 {
+			text = i18n.T(style.text)
+		}
+		pairs = append(pairs, style.token, text)
+	}
+	return strings.NewReplacer(pairs...).Replace(format)
+}
+
+func Attribute_message(attribute screen.Attribute, mode, format string) Message {
+	text := Format_attributes(attribute, format)
+	if mode == "beeps" || strings.TrimSpace(text) == "" && !attribute.Default() {
+		text = i18n.T("has attribute")
+	}
+	message := Message{Text: text, Attributes: &Attributes{Speech: mode != "beeps"}}
+	if mode == "beeps" || mode == "both" {
+		message.Cue = HasAttributes
+	}
+	return message
+}