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style: Introduce a TDocument trait.

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This will be useful for querySelector optimizations.
This commit is contained in:
Emilio Cobos Álvarez 2017-10-26 12:48:59 +02:00
parent 6c796b50ec
commit 4d4fa69018
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GPG key ID: 056B727BB9C1027C
3 changed files with 58 additions and 9 deletions
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19
components/layout_thread/dom_wrapper.rs
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@ -69,7 +69,7 @@ use style::computed_values::display;
use style::context::SharedStyleContext;
use style::data::ElementData;
use style::dom::{DomChildren, LayoutIterator, NodeInfo, OpaqueNode};
use style::dom::{TElement, TNode};
use style::dom::{TDocument, TElement, TNode};
use style::element_state::*;
use style::font_metrics::ServoMetricsProvider;
use style::properties::{ComputedValues, PropertyDeclarationBlock};
@ -139,10 +139,6 @@ impl<'ln> ServoLayoutNode<'ln> {
self.node.type_id_for_layout()
}
}
pub fn as_document(&self) -> Option<ServoLayoutDocument<'ln>> {
self.node.downcast().map(ServoLayoutDocument::from_layout_js)
}
}
impl<'ln> NodeInfo for ServoLayoutNode<'ln> {
@ -158,6 +154,7 @@ impl<'ln> NodeInfo for ServoLayoutNode<'ln> {
}
impl<'ln> TNode for ServoLayoutNode<'ln> {
type ConcreteDocument = ServoLayoutDocument<'ln>;
type ConcreteElement = ServoLayoutElement<'ln>;
fn parent_node(&self) -> Option<Self> {
@ -206,6 +203,10 @@ impl<'ln> TNode for ServoLayoutNode<'ln> {
as_element(self.node)
}
fn as_document(&self) -> Option<ServoLayoutDocument<'ln>> {
self.node.downcast().map(ServoLayoutDocument::from_layout_js)
}
fn can_be_fragmented(&self) -> bool {
unsafe { self.node.get_flag(CAN_BE_FRAGMENTED) }
}
@ -287,11 +288,15 @@ pub struct ServoLayoutDocument<'ld> {
chain: PhantomData<&'ld ()>,
}
impl<'ld> ServoLayoutDocument<'ld> {
fn as_node(&self) -> ServoLayoutNode<'ld> {
impl<'ld> TDocument for ServoLayoutDocument<'ld> {
type ConcreteNode = ServoLayoutNode<'ld>;
fn as_node(&self) -> Self::ConcreteNode {
ServoLayoutNode::from_layout_js(self.document.upcast())
}
}
impl<'ld> ServoLayoutDocument<'ld> {
pub fn root_element(&self) -> Option<ServoLayoutElement<'ld>> {
self.as_node().dom_children().flat_map(|n| n.as_element()).next()
}