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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/. */
#![allow(unrooted_must_root)]
use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use dom::bindings::inheritance::Castable;
use dom::bindings::js::{JS, MutNullableJS, Root};
use dom::bindings::str::DOMString;
use dom::bindings::trace::JSTraceable;
use dom::comment::Comment;
use dom::document::Document;
use dom::documenttype::DocumentType;
use dom::element::{Element, ElementCreator};
use dom::htmlscriptelement::HTMLScriptElement;
use dom::node::Node;
use dom::processinginstruction::ProcessingInstruction;
use dom::virtualmethods::vtable_for;
use html5ever::tokenizer::buffer_queue::BufferQueue;
use html5ever::tree_builder::{NodeOrText as H5eNodeOrText};
use html5ever_atoms::{Prefix, QualName};
use js::jsapi::JSTracer;
use servo_url::ServoUrl;
use std::borrow::Cow;
use xml5ever::tendril::StrTendril;
use xml5ever::tokenizer::{Attribute, QName, XmlTokenizer};
use xml5ever::tree_builder::{NextParserState, NodeOrText};
use xml5ever::tree_builder::{Tracer as XmlTracer, TreeSink, XmlTreeBuilder};
#[derive(HeapSizeOf, JSTraceable)]
#[must_root]
pub struct Tokenizer {
#[ignore_heap_size_of = "Defined in xml5ever"]
inner: XmlTokenizer<XmlTreeBuilder<JS<Node>, Sink>>,
}
impl Tokenizer {
pub fn new(document: &Document, url: ServoUrl) -> Self {
let sink = Sink {
base_url: url,
document: JS::from_ref(document),
script: Default::default(),
};
let tb = XmlTreeBuilder::new(sink, Default::default());
let tok = XmlTokenizer::new(tb, Default::default());
Tokenizer {
inner: tok,
}
}
pub fn feed(&mut self, input: &mut BufferQueue) -> Result<(), Root<HTMLScriptElement>> {
if !input.is_empty() {
while let Some(chunk) = input.pop_front() {
self.inner.feed(chunk);
if let Some(script) = self.inner.sink().sink().script.take() {
return Err(script);
}
}
} else {
self.inner.run();
if let Some(script) = self.inner.sink().sink().script.take() {
return Err(script);
}
}
Ok(())
}
pub fn end(&mut self) {
self.inner.end()
}
pub fn url(&self) -> &ServoUrl {
&self.inner.sink().sink().base_url
}
}
#[allow(unsafe_code)]
unsafe impl JSTraceable for XmlTokenizer<XmlTreeBuilder<JS<Node>, Sink>> {
unsafe fn trace(&self, trc: *mut JSTracer) {
struct Tracer(*mut JSTracer);
let tracer = Tracer(trc);
impl XmlTracer for Tracer {
type Handle = JS<Node>;
#[allow(unrooted_must_root)]
fn trace_handle(&self, node: JS<Node>) {
unsafe { node.trace(self.0); }
}
}
let tree_builder = self.sink();
tree_builder.trace_handles(&tracer);
tree_builder.sink().trace(trc);
}
}
#[derive(JSTraceable, HeapSizeOf)]
#[must_root]
struct Sink {
base_url: ServoUrl,
document: JS<Document>,
script: MutNullableJS<HTMLScriptElement>,
}
impl TreeSink for Sink {
type Output = Self;
type Handle = JS<Node>;
fn finish(self) -> Self {
self
}
fn parse_error(&mut self, msg: Cow<'static, str>) {
debug!("Parse error: {}", msg);
}
fn get_document(&mut self) -> JS<Node> {
JS::from_ref(self.document.upcast())
}
fn elem_name(&self, target: &JS<Node>) -> QName {
let elem = target.downcast::<Element>()
.expect("tried to get name of non-Element in XML parsing");
QName {
prefix: elem.prefix().map_or(namespace_prefix!(""), |p| Prefix::from(&**p)),
namespace_url: elem.namespace().clone(),
local: elem.local_name().clone(),
}
}
fn create_element(&mut self, name: QName, attrs: Vec<Attribute>)
-> JS<Node> {
let prefix = if name.prefix == namespace_prefix!("") { None } else { Some(name.prefix) };
let name = QualName {
ns: name.namespace_url,
local: name.local,
};
//TODO: Add ability to track lines to API of xml5ever
let elem = Element::create(name, prefix, &*self.document,
ElementCreator::ParserCreated(1));
for attr in attrs {
let name = QualName {
ns: attr.name.namespace_url,
local: attr.name.local,
};
elem.set_attribute_from_parser(name, DOMString::from(String::from(attr.value)), None);
}
JS::from_ref(elem.upcast())
}
fn create_comment(&mut self, text: StrTendril) -> JS<Node> {
let comment = Comment::new(DOMString::from(String::from(text)), &*self.document);
JS::from_ref(comment.upcast())
}
fn append(&mut self, parent: JS<Node>, child: NodeOrText<JS<Node>>) {
let child = match child {
NodeOrText::AppendNode(n) => H5eNodeOrText::AppendNode(n),
NodeOrText::AppendText(s) => H5eNodeOrText::AppendText(s),
};
super::insert(&*parent, None, child);
}
fn append_doctype_to_document(&mut self, name: StrTendril, public_id: StrTendril,
system_id: StrTendril) {
let doc = &*self.document;
let doctype = DocumentType::new(
DOMString::from(String::from(name)), Some(DOMString::from(String::from(public_id))),
Some(DOMString::from(String::from(system_id))), doc);
doc.upcast::<Node>().AppendChild(doctype.upcast()).expect("Appending failed");
}
fn create_pi(&mut self, target: StrTendril, data: StrTendril) -> JS<Node> {
let doc = &*self.document;
let pi = ProcessingInstruction::new(
DOMString::from(String::from(target)), DOMString::from(String::from(data)),
doc);
JS::from_ref(pi.upcast())
}
fn mark_script_already_started(&mut self, node: Self::Handle) {
let script = node.downcast::<HTMLScriptElement>();
if let Some(script) = script {
script.set_already_started(true);
}
}
fn complete_script(&mut self, node: Self::Handle) -> NextParserState {
if let Some(script) = node.downcast() {
self.script.set(Some(script));
NextParserState::Suspend
} else {
NextParserState::Continue
}
}
fn pop(&mut self, node: Self::Handle) {
let node = Root::from_ref(&*node);
vtable_for(&node).pop();
}
}
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