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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(unsafe_blocks)]
use dom::attr::AttrHelpers;
use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
use dom::bindings::codegen::InheritTypes::{NodeCast, ElementCast, HTMLScriptElementCast};
use dom::bindings::js::{JS, JSRef, Temporary, OptionalRootable, Root};
use dom::comment::Comment;
use dom::document::{Document, DocumentHelpers};
use dom::documenttype::DocumentType;
use dom::element::{Element, AttributeHandlers, ElementHelpers, ElementCreator};
use dom::htmlscriptelement::HTMLScriptElement;
use dom::htmlscriptelement::HTMLScriptElementHelpers;
use dom::node::{Node, NodeHelpers, TrustedNodeAddress};
use dom::servohtmlparser;
use dom::servohtmlparser::ServoHTMLParser;
use dom::text::Text;
use parse::Parser;
use encoding::all::UTF_8;
use encoding::types::{Encoding, DecoderTrap};
use servo_net::resource_task::{ProgressMsg, LoadResponse};
use servo_util::task_state;
use servo_util::task_state::IN_HTML_PARSER;
use std::ascii::AsciiExt;
use std::str::CowString;
use url::Url;
use html5ever::Attribute;
use html5ever::tree_builder::{TreeSink, QuirksMode, NodeOrText, AppendNode, AppendText};
use string_cache::QualName;
pub enum HTMLInput {
InputString(String),
InputUrl(LoadResponse),
}
trait SinkHelpers {
fn get_or_create(&self, child: NodeOrText<TrustedNodeAddress>) -> Temporary<Node>;
}
impl SinkHelpers for servohtmlparser::Sink {
fn get_or_create(&self, child: NodeOrText<TrustedNodeAddress>) -> Temporary<Node> {
match child {
AppendNode(n) => Temporary::new(unsafe { JS::from_trusted_node_address(n) }),
AppendText(t) => {
let doc = self.document.root();
let text = Text::new(t, doc.r());
NodeCast::from_temporary(text)
}
}
}
}
impl<'a> TreeSink<TrustedNodeAddress> for servohtmlparser::Sink {
fn get_document(&mut self) -> TrustedNodeAddress {
let doc = self.document.root();
let node: JSRef<Node> = NodeCast::from_ref(doc.r());
node.to_trusted_node_address()
}
fn same_node(&self, x: TrustedNodeAddress, y: TrustedNodeAddress) -> bool {
x == y
}
fn elem_name(&self, target: TrustedNodeAddress) -> QualName {
let node: Root<Node> = unsafe { JS::from_trusted_node_address(target).root() };
let elem: JSRef<Element> = ElementCast::to_ref(node.r())
.expect("tried to get name of non-Element in HTML parsing");
QualName {
ns: elem.namespace().clone(),
local: elem.local_name().clone(),
}
}
fn create_element(&mut self, name: QualName, attrs: Vec<Attribute>)
-> TrustedNodeAddress {
let doc = self.document.root();
let elem = Element::create(name, None, doc.r(),
ElementCreator::ParserCreated).root();
for attr in attrs.into_iter() {
elem.r().set_attribute_from_parser(attr.name, attr.value, None);
}
let node: JSRef<Node> = NodeCast::from_ref(elem.r());
node.to_trusted_node_address()
}
fn create_comment(&mut self, text: String) -> TrustedNodeAddress {
let doc = self.document.root();
let comment = Comment::new(text, doc.r());
let node: Root<Node> = NodeCast::from_temporary(comment).root();
node.r().to_trusted_node_address()
}
fn append_before_sibling(&mut self,
sibling: TrustedNodeAddress,
new_node: NodeOrText<TrustedNodeAddress>) -> Result<(), NodeOrText<TrustedNodeAddress>> {
// If there is no parent, return the node to the parser.
let sibling: Root<Node> = unsafe { JS::from_trusted_node_address(sibling).root() };
let parent = match sibling.r().parent_node() {
Some(p) => p.root(),
None => return Err(new_node),
};
let child = self.get_or_create(new_node).root();
assert!(parent.r().InsertBefore(child.r(), Some(sibling.r())).is_ok());
Ok(())
}
fn parse_error(&mut self, msg: CowString<'static>) {
debug!("Parse error: {}", msg);
}
fn set_quirks_mode(&mut self, mode: QuirksMode) {
let doc = self.document.root();
doc.r().set_quirks_mode(mode);
}
fn append(&mut self, parent: TrustedNodeAddress, child: NodeOrText<TrustedNodeAddress>) {
let parent: Root<Node> = unsafe { JS::from_trusted_node_address(parent).root() };
let child = self.get_or_create(child).root();
// FIXME(#3701): Use a simpler algorithm and merge adjacent text nodes
assert!(parent.r().AppendChild(child.r()).is_ok());
}
fn append_doctype_to_document(&mut self, name: String, public_id: String, system_id: String) {
let doc = self.document.root();
let doc_node: JSRef<Node> = NodeCast::from_ref(doc.r());
let doctype = DocumentType::new(name, Some(public_id), Some(system_id), doc.r());
let node: Root<Node> = NodeCast::from_temporary(doctype).root();
assert!(doc_node.AppendChild(node.r()).is_ok());
}
fn add_attrs_if_missing(&mut self, target: TrustedNodeAddress, attrs: Vec<Attribute>) {
let node: Root<Node> = unsafe { JS::from_trusted_node_address(target).root() };
let elem: JSRef<Element> = ElementCast::to_ref(node.r())
.expect("tried to set attrs on non-Element in HTML parsing");
for attr in attrs.into_iter() {
elem.set_attribute_from_parser(attr.name, attr.value, None);
}
}
fn remove_from_parent(&mut self, _target: TrustedNodeAddress) {
error!("remove_from_parent not implemented!");
}
fn mark_script_already_started(&mut self, node: TrustedNodeAddress) {
let node: Root<Node> = unsafe { JS::from_trusted_node_address(node).root() };
let script: Option<JSRef<HTMLScriptElement>> = HTMLScriptElementCast::to_ref(node.r());
script.map(|script| script.mark_already_started());
}
fn complete_script(&mut self, node: TrustedNodeAddress) {
let node: Root<Node> = unsafe { JS::from_trusted_node_address(node).root() };
let script: Option<JSRef<HTMLScriptElement>> = HTMLScriptElementCast::to_ref(node.r());
script.map(|script| script.prepare());
}
}
pub fn parse_html(document: JSRef<Document>,
input: HTMLInput,
url: &Url) {
let parser = ServoHTMLParser::new(Some(url.clone()), document).root();
let parser: JSRef<ServoHTMLParser> = parser.r();
let nested_parse = task_state::get().contains(task_state::IN_HTML_PARSER);
if !nested_parse {
task_state::enter(IN_HTML_PARSER);
}
match input {
HTMLInput::InputString(s) => {
parser.parse_chunk(s);
}
HTMLInput::InputUrl(load_response) => {
match load_response.metadata.content_type {
Some((ref t, _)) if t.as_slice().eq_ignore_ascii_case("image") => {
let page = format!("<html><body><img src='{}' /></body></html>", url.serialize());
parser.parse_chunk(page);
},
_ => {
for msg in load_response.progress_port.iter() {
match msg {
ProgressMsg::Payload(data) => {
// FIXME: use Vec<u8> (html5ever #34)
let data = UTF_8.decode(data.as_slice(), DecoderTrap::Replace).unwrap();
parser.parse_chunk(data);
}
ProgressMsg::Done(Err(err)) => {
panic!("Failed to load page URL {}, error: {}", url.serialize(), err);
}
ProgressMsg::Done(Ok(())) => break,
}
}
}
}
}
}
parser.finish();
if !nested_parse {
task_state::exit(IN_HTML_PARSER);
}
debug!("finished parsing");
}
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