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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::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
use dom::bindings::inheritance::{Castable, CharacterDataTypeId, NodeTypeId};
use dom::bindings::js::{JS, Root};
use dom::bindings::trace::JSTraceable;
use dom::characterdata::CharacterData;
use dom::document::Document;
use dom::documenttype::DocumentType;
use dom::element::Element;
use dom::htmlscriptelement::HTMLScriptElement;
use dom::htmltemplateelement::HTMLTemplateElement;
use dom::node::Node;
use dom::processinginstruction::ProcessingInstruction;
use dom::servoparser::Sink;
use html5ever::QualName;
use html5ever::buffer_queue::BufferQueue;
use html5ever::serialize::{AttrRef, Serialize, Serializer};
use html5ever::serialize::TraversalScope;
use html5ever::serialize::TraversalScope::{ChildrenOnly, IncludeNode};
use html5ever::tokenizer::{Tokenizer as HtmlTokenizer, TokenizerOpts, TokenizerResult};
use html5ever::tree_builder::{Tracer as HtmlTracer, TreeBuilder, TreeBuilderOpts};
use js::jsapi::JSTracer;
use servo_url::ServoUrl;
use std::io;
#[derive(HeapSizeOf, JSTraceable)]
#[must_root]
pub struct Tokenizer {
#[ignore_heap_size_of = "Defined in html5ever"]
inner: HtmlTokenizer<TreeBuilder<JS<Node>, Sink>>,
}
impl Tokenizer {
pub fn new(
document: &Document,
url: ServoUrl,
fragment_context: Option<super::FragmentContext>)
-> Self {
let sink = Sink {
base_url: url,
document: JS::from_ref(document),
current_line: 1,
script: Default::default(),
};
let options = TreeBuilderOpts {
ignore_missing_rules: true,
.. Default::default()
};
let inner = if let Some(fc) = fragment_context {
let tb = TreeBuilder::new_for_fragment(
sink,
JS::from_ref(fc.context_elem),
fc.form_elem.map(|n| JS::from_ref(n)),
options);
let tok_options = TokenizerOpts {
initial_state: Some(tb.tokenizer_state_for_context_elem()),
.. Default::default()
};
HtmlTokenizer::new(tb, tok_options)
} else {
HtmlTokenizer::new(TreeBuilder::new(sink, options), Default::default())
};
Tokenizer {
inner: inner,
}
}
pub fn feed(&mut self, input: &mut BufferQueue) -> Result<(), Root<HTMLScriptElement>> {
match self.inner.feed(input) {
TokenizerResult::Done => Ok(()),
TokenizerResult::Script(script) => Err(Root::from_ref(script.downcast().unwrap())),
}
}
pub fn end(&mut self) {
self.inner.end();
}
pub fn url(&self) -> &ServoUrl {
&self.inner.sink().sink().base_url
}
pub fn set_plaintext_state(&mut self) {
self.inner.set_plaintext_state();
}
}
#[allow(unsafe_code)]
unsafe impl JSTraceable for HtmlTokenizer<TreeBuilder<JS<Node>, Sink>> {
unsafe fn trace(&self, trc: *mut JSTracer) {
struct Tracer(*mut JSTracer);
let tracer = Tracer(trc);
impl HtmlTracer 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);
}
}
impl<'a> Serialize for &'a Node {
fn serialize<S: Serializer>(&self, serializer: &mut S,
traversal_scope: TraversalScope) -> io::Result<()> {
let node = *self;
match (traversal_scope, node.type_id()) {
(_, NodeTypeId::Element(..)) => {
let elem = node.downcast::<Element>().unwrap();
let name = QualName::new(None, elem.namespace().clone(),
elem.local_name().clone());
if traversal_scope == IncludeNode {
let attrs = elem.attrs().iter().map(|attr| {
let qname = QualName::new(None, attr.namespace().clone(),
attr.local_name().clone());
let value = attr.value().clone();
(qname, value)
}).collect::<Vec<_>>();
let attr_refs = attrs.iter().map(|&(ref qname, ref value)| {
let ar: AttrRef = (&qname, &**value);
ar
});
try!(serializer.start_elem(name.clone(), attr_refs));
}
let children = if let Some(tpl) = node.downcast::<HTMLTemplateElement>() {
// https://github.com/w3c/DOM-Parsing/issues/1
tpl.Content().upcast::<Node>().children()
} else {
node.children()
};
for handle in children {
try!((&*handle).serialize(serializer, IncludeNode));
}
if traversal_scope == IncludeNode {
try!(serializer.end_elem(name.clone()));
}
Ok(())
},
(ChildrenOnly, NodeTypeId::Document(_)) => {
for handle in node.children() {
try!((&*handle).serialize(serializer, IncludeNode));
}
Ok(())
},
(ChildrenOnly, _) => Ok(()),
(IncludeNode, NodeTypeId::DocumentType) => {
let doctype = node.downcast::<DocumentType>().unwrap();
serializer.write_doctype(&doctype.name())
},
(IncludeNode, NodeTypeId::CharacterData(CharacterDataTypeId::Text)) => {
let cdata = node.downcast::<CharacterData>().unwrap();
serializer.write_text(&cdata.data())
},
(IncludeNode, NodeTypeId::CharacterData(CharacterDataTypeId::Comment)) => {
let cdata = node.downcast::<CharacterData>().unwrap();
serializer.write_comment(&cdata.data())
},
(IncludeNode, NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction)) => {
let pi = node.downcast::<ProcessingInstruction>().unwrap();
let data = pi.upcast::<CharacterData>().data();
serializer.write_processing_instruction(&pi.target(), &data)
},
(IncludeNode, NodeTypeId::DocumentFragment) => Ok(()),
(IncludeNode, NodeTypeId::Document(_)) => panic!("Can't serialize Document node itself"),
}
}
}
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