use std::cell::RefCell;
use we_html::parse_html;
use we_layout::layout;
use we_platform::appkit;
use we_platform::cg::BitmapContext;
use we_render::Renderer;
use we_style::computed::{extract_stylesheets, resolve_styles};
use we_text::font::{self, Font};
/// Default HTML page shown when no file argument is provided.
const DEFAULT_HTML: &str = r#"
we browser
Hello from we!
This is a from-scratch web browser engine written in pure Rust.
Zero external crate dependencies. Every subsystem is implemented in Rust.
Features
HTML5 tokenizer, DOM tree, block layout, CSS cascade, and software rendering.
"#;
/// Browser state kept in thread-local storage so the resize handler can
/// access it. All AppKit callbacks run on the main thread.
struct BrowserState {
html: String,
font: Font,
bitmap: Box,
view: appkit::BitmapView,
}
thread_local! {
static STATE: RefCell> = const { RefCell::new(None) };
}
/// Re-run the full pipeline: parse → extract CSS → resolve styles → layout → render → copy to bitmap.
fn render_page(html: &str, font: &Font, bitmap: &mut BitmapContext) {
let width = bitmap.width() as u32;
let height = bitmap.height() as u32;
if width == 0 || height == 0 {
return;
}
// Parse HTML into DOM.
let doc = parse_html(html);
// Extract CSS from