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Update concept of node filter algorithm

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CYBAI 2017-08-27 02:22:11 +08:00
parent 6268f48208
commit cb8b52c5fe
2 changed files with 44 additions and 17 deletions
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26
components/script/dom/nodeiterator.rs
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@ -8,7 +8,7 @@ use dom::bindings::codegen::Bindings::NodeFilterBinding::NodeFilter;
use dom::bindings::codegen::Bindings::NodeFilterBinding::NodeFilterConstants;
use dom::bindings::codegen::Bindings::NodeIteratorBinding;
use dom::bindings::codegen::Bindings::NodeIteratorBinding::NodeIteratorMethods;
use dom::bindings::error::Fallible;
use dom::bindings::error::{Error, Fallible};
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::bindings::root::{Dom, DomRoot, MutDom};
use dom::document::Document;
@ -27,6 +27,7 @@ pub struct NodeIterator {
what_to_show: u32,
#[ignore_malloc_size_of = "Can't measure due to #6870"]
filter: Filter,
active: Cell<bool>,
}
impl NodeIterator {
@ -39,7 +40,8 @@ impl NodeIterator {
reference_node: MutDom::new(root_node),
pointer_before_reference_node: Cell::new(true),
what_to_show: what_to_show,
filter: filter
filter: filter,
active: Cell::new(false),
}
}
@ -192,15 +194,29 @@ impl NodeIterator {
// https://dom.spec.whatwg.org/#concept-node-filter
fn accept_node(&self, node: &Node) -> Fallible<u16> {
// Step 1.
let n = node.NodeType() - 1;
if self.active.get() {
return Err(Error::InvalidState);
}
// Step 2.
let n = node.NodeType() - 1;
// Step 3.
if (self.what_to_show & (1 << n)) == 0 {
return Ok(NodeFilterConstants::FILTER_SKIP)
}
// Step 3-5.
match self.filter {
// Step 4.
Filter::None => Ok(NodeFilterConstants::FILTER_ACCEPT),
Filter::Callback(ref callback) => callback.AcceptNode_(self, node, Rethrow)
Filter::Callback(ref callback) => {
// Step 5.
self.active.set(true);
// Step 6.
let result = callback.AcceptNode_(self, node, Rethrow);
// Step 7.
self.active.set(false);
// Step 8.
result
}
}
}
}