Sinxelo

A minimal WordPress theme. Sinxelo is Galician for "simple." An updated continuation of Simppeli by Sami Keijonen: combined, modernized, and extended with Gutenberg block support. Since Simppeli means "simple" in Finnish, sinxelo looks, sounds, and feels appropriate.

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Why This Exists

For several years I used Simppeli (parent) + a customized child theme on my personal website. Over time the parent/child relationship became a liability:

• The parent was last updated in 2017
• Every template change required tracking which file "won"
• Site-specific integrations (SSP, Jetpack, year archives, taxonomies) were tangled into the child theme
• The theme had no Gutenberg block support

Rather than migrate to Full Site Editing, which I want to explore as a separate project, I took a different path: merge everything into one standalone classic theme, add block editor support where it makes sense (content area only), and extract site-specific code into its own plugin.

What This Is Not

This is not an FSE theme. There is no Site Editor. No block templates. No templates/*.html files. Layout decisions are made in PHP, which is where I want them.

Blocks are used as content tools, not layout tools. The block editor is active in posts and pages. Custom blocks (callout box) live in blocks/. The Site Editor is not available.

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File Structure

sinxelo/
├── style.css                    # Theme header + merged CSS (parent base + child additions)
├── theme.json                   # Minimal block editor tokens: 6 colors, 3 fonts, no free-form picker
├── functions.php                # Theme setup, enqueue, blocks, shortcodes, content filters
│
├── index.php                    # Fallback template
├── single.php                   # Single post
├── page.php                     # Page
├── archive.php                  # Archive
├── search.php                   # Search results
├── 404.php                      # 404 (custom messaging)
├── comments.php                 # Comments template
├── header.php                   # Header
├── footer.php                   # Footer (custom links + motto)
├── menu-primary.php             # Primary nav
├── page-titleless.php           # Custom template: page without title
│
├── template-parts/
│   ├── content.php              # Default post (stream view)
│   ├── content-single.php       # Single post
│   ├── content-page.php         # Page
│   ├── content-search.php       # Search result item
│   └── content-none.php        # No results
│
├── inc/
│   ├── template-tags.php        # sinxelo_posted_on(), sinxelo_entry_footer(), etc.
│   ├── extras.php               # Body classes
│   ├── customizer.php           # Customizer live preview
│   ├── custom-header.php        # Custom header image support
│   └── custom-background.php   # Custom background support
│
├── blocks/
│   └── callout/                 # sinxelo/callout — InnerBlocks callout box
│       ├── block.json
│       ├── index.js
│       └── index.asset.php
│
├── assets/
│   ├── css/
│   │   └── editor-style.css     # Block editor styles (typography, colors, callout)
│   └── fonts/                   # Locally hosted Noto Sans + Noto Serif (woff2)
│       ├── noto-sans-normal-latin.woff2
│       ├── noto-sans-normal-latin-ext.woff2
│       ├── noto-sans-italic-latin.woff2
│       ├── noto-sans-italic-latin-ext.woff2
│       ├── noto-serif-normal-latin.woff2
│       ├── noto-serif-normal-latin-ext.woff2
│       ├── noto-serif-italic-latin.woff2
│       └── noto-serif-italic-latin-ext.woff2
│
└── js/
    ├── skip-link-focus-fix.js   # Accessibility
    └── customizer.js            # Customizer live preview

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Theme / Site Plugin Boundary

Site-specific code (SSP podcast integrations, Jetpack config, year archive rewrites, language taxonomy, [ola] shortcode) lives in a separate plugin: ats-site.

In this theme:

• Presentation, typography, layout templates
• sinxelo/callout block + [callout] shortcode (backward compat)
• Generic shortcodes: [searchform], [tag_cloud], [category_cloud] (posts only)
• Easy anchors (heading ID injection, folded in from standalone plugin)
• Archive title cleanup filter
• Disable Twemoji

In ats-site plugin:

• Seriously Simple Podcasting integrations
• Jetpack related posts configuration
• Year archive URL rewrites (/year/####/)
• language taxonomy
• Sitemap filters
• [ola] Galician greeting shortcode + ats/ola block
• [category_cloud] with podcast CPT override

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Block Editor

theme.json locks the editor to the theme's design system:

• Colors: Text, Heading, Background, Border, Highlight (gold #F4E28A), Muted — no free-form color picker
• Fonts: Noto Serif, Noto Sans, Monospace — no arbitrary font choices
• No gradients, no custom spacing controls

Fonts are served locally from assets/fonts/. The OMGF plugin can be deactivated.

sinxelo/callout block

A yellow highlight box that wraps any inner blocks. Registered in blocks/callout/. The classic [callout]...[/callout] shortcode remains active as a fallback for existing content.

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Credits

• Simppeli by Sami Keijonen — the parent theme this is based on
• Underscores by Automattic — the foundation Simppeli was built on
• Licensed under GPL v2 or later