ferrum-email-render 0.1.4

Rendering engine for Ferrum Email — Node tree to HTML, plain text, and CSS inlining
Documentation

ferrum-email-render

The rendering engine for Ferrum Email.

What It Does

Takes a Component, calls its render() method, and produces:

  1. Email-safe HTML — all CSS inlined as style="" attributes, HTML entities escaped, void elements self-closed
  2. Plain text — extracted from the node tree with links as text (url), images as [alt], and horizontal rules as ---

Pipeline

Component::render() → Node tree
       ↓
   CSS Inliner       (Style structs → style="" attributes)
       ↓
   HTML Emitter      (Node tree → HTML string)
       ↓
   Text Extractor    (Node tree → plain text fallback)

Usage

use ferrum_email_render::Renderer;
use ferrum_email_core::Component;

let renderer = Renderer::default();

let html = renderer.render_html(&my_email).unwrap();
let text = renderer.render_text(&my_email).unwrap();

Configuration

use ferrum_email_render::{Renderer, RenderConfig};

let renderer = Renderer::with_config(RenderConfig {
    include_doctype: true,     // Prepend <!DOCTYPE html>
    pretty_print: false,       // Compact output (default)
    indent: "  ".to_string(),  // Indentation for pretty-print
});

Key Decisions

  • No <style> blocks — Gmail strips them. Everything is inlined.
  • DOCTYPE included by default — <!DOCTYPE html> ensures standards mode.
  • Void elements are self-closing: <img />, <hr />, <br />, <meta />.
  • Text escaping handles &, <, > in content and additionally ", ' in attributes.

License

MIT OR Apache-2.0