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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! The bulk of the HTML parser integration is in `script::parse::html`.
//! This module is mostly about its interaction with DOM memory management.
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::ServoHTMLParserBinding;
use dom::bindings::global::GlobalRef;
use dom::bindings::trace::JSTraceable;
use dom::bindings::js::{JS, JSRef, Temporary};
use dom::bindings::utils::{Reflectable, Reflector, reflect_dom_object};
use dom::document::{Document, DocumentHelpers};
use dom::node::Node;
use parse::Parser;
use util::task_state;
use std::default::Default;
use url::Url;
use js::jsapi::JSTracer;
use html5ever::tokenizer;
use html5ever::tree_builder;
use html5ever::tree_builder::{TreeBuilder, TreeBuilderOpts};
#[must_root]
#[jstraceable]
pub struct Sink {
pub base_url: Option<Url>,
pub document: JS<Document>,
}
/// FragmentContext is used only to pass this group of related values
/// into functions.
#[derive(Copy)]
pub struct FragmentContext<'a> {
pub context_elem: JSRef<'a, Node>,
pub form_elem: Option<JSRef<'a, Node>>,
}
pub type Tokenizer = tokenizer::Tokenizer<TreeBuilder<JS<Node>, Sink>>;
// NB: JSTraceable is *not* auto-derived.
// You must edit the impl below if you add fields!
#[must_root]
#[privatize]
pub struct ServoHTMLParser {
reflector_: Reflector,
tokenizer: DOMRefCell<Tokenizer>,
}
impl Parser for ServoHTMLParser{
fn parse_chunk(&self, input: String) {
self.tokenizer().borrow_mut().feed(input);
}
fn finish(&self){
self.tokenizer().borrow_mut().end();
}
}
impl ServoHTMLParser {
#[allow(unrooted_must_root)]
pub fn new(base_url: Option<Url>, document: JSRef<Document>) -> Temporary<ServoHTMLParser> {
let window = document.window().root();
let sink = Sink {
base_url: base_url,
document: JS::from_rooted(document),
};
let tb = TreeBuilder::new(sink, TreeBuilderOpts {
ignore_missing_rules: true,
.. Default::default()
});
let tok = tokenizer::Tokenizer::new(tb, Default::default());
let parser = ServoHTMLParser {
reflector_: Reflector::new(),
tokenizer: DOMRefCell::new(tok),
};
reflect_dom_object(box parser, GlobalRef::Window(window.r()),
ServoHTMLParserBinding::Wrap)
}
#[allow(unrooted_must_root)]
pub fn new_for_fragment(base_url: Option<Url>, document: JSRef<Document>,
fragment_context: FragmentContext) -> Temporary<ServoHTMLParser> {
let window = document.window().root();
let sink = Sink {
base_url: base_url,
document: JS::from_rooted(document),
};
let tb_opts = TreeBuilderOpts {
ignore_missing_rules: true,
.. Default::default()
};
let tb = TreeBuilder::new_for_fragment(sink,
JS::from_rooted(fragment_context.context_elem),
fragment_context.form_elem.map(|n| JS::from_rooted(n)),
tb_opts);
let tok_opts = tokenizer::TokenizerOpts {
initial_state: Some(tb.tokenizer_state_for_context_elem()),
.. Default::default()
};
let tok = tokenizer::Tokenizer::new(tb, tok_opts);
let parser = ServoHTMLParser {
reflector_: Reflector::new(),
tokenizer: DOMRefCell::new(tok),
};
reflect_dom_object(box parser, GlobalRef::Window(window.r()),
ServoHTMLParserBinding::Wrap)
}
#[inline]
pub fn tokenizer<'a>(&'a self) -> &'a DOMRefCell<Tokenizer> {
&self.tokenizer
}
}
impl Reflectable for ServoHTMLParser {
fn reflector<'a>(&'a self) -> &'a Reflector {
&self.reflector_
}
}
struct Tracer {
trc: *mut JSTracer,
}
impl tree_builder::Tracer for Tracer {
type Handle = JS<Node>;
#[allow(unrooted_must_root)]
fn trace_handle(&self, node: JS<Node>) {
node.trace(self.trc);
}
}
impl JSTraceable for ServoHTMLParser {
#[allow(unsafe_code)]
fn trace(&self, trc: *mut JSTracer) {
self.reflector_.trace(trc);
let tracer = Tracer {
trc: trc,
};
let tracer = &tracer as &tree_builder::Tracer<Handle=JS<Node>>;
unsafe {
// Assertion: If the parser is mutably borrowed, we're in the
// parsing code paths.
debug_assert!(task_state::get().contains(task_state::IN_HTML_PARSER)
|| !self.tokenizer.is_mutably_borrowed());
let tokenizer = self.tokenizer.borrow_for_gc_trace();
let tree_builder = tokenizer.sink();
tree_builder.trace_handles(tracer);
tree_builder.sink().trace(trc);
}
}
}
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