themes-magazine-bold/heading_override.go

package main

import (
	"bytes"
	"context"
	"strconv"
)

// HeadingOverrideBlock renders headings with the Magazine Bold display-serif scale
// and an optional drop-cap on h1.
//
// Built-in heading content shape: {"text": "...", "level": 1-6, "textClass": "..."}
func HeadingOverrideBlock(ctx context.Context, content map[string]any) string {
	text := getString(content, "text")
	textClass := getString(content, "textClass")
	level := parseHeadingLevel(content)

	var buf bytes.Buffer
	_ = mbHeadingComponent(level, text, textClass).Render(ctx, &buf)
	return buf.String()
}

// parseHeadingLevel parses the level from content, defaulting to 2.
func parseHeadingLevel(content map[string]any) int {
	if level, ok := content["level"].(float64); ok {
		l := int(level)
		if l >= 1 && l <= 6 {
			return l
		}
	}
	if level, ok := content["level"].(int); ok {
		if level >= 1 && level <= 6 {
			return level
		}
	}
	if level, ok := content["level"].(string); ok {
		if l, err := strconv.Atoi(level); err == nil && l >= 1 && l <= 6 {
			return l
		}
	}
	return 2
}

// mbHeadingBaseClass returns the Magazine Bold class for each heading level.
// h1 picks up the .text-folio clamp + drop-cap behaviour.
func mbHeadingBaseClass(level int) string {
	switch level {
	case 1:
		return "font-display text-folio text-foreground mb-dropcap"
	case 2:
		return "font-display text-deck text-foreground"
	case 3:
		return "font-display text-3xl text-foreground"
	case 4:
		return "font-serif-sub text-2xl text-foreground"
	case 5:
		return "font-serif-sub text-xl text-foreground"
	case 6:
		return "font-mono text-kicker text-muted-foreground"
	default:
		return "font-display text-deck text-foreground"
	}
}