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Make ChildrenIterator concrete.

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This will allow us to specialize ChildrenIterator in the Gecko case to do
something more interesting in some cases.
This commit is contained in:
Bobby Holley 2016-08-10 15:07:36 -07:00
parent 470368ecce
commit b56297f2a5
3 changed files with 42 additions and 19 deletions
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20
components/script/layout_wrapper.rs
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@ -115,6 +115,7 @@ impl<'ln> TNode for ServoLayoutNode<'ln> {
type ConcreteElement = ServoLayoutElement<'ln>;
type ConcreteDocument = ServoLayoutDocument<'ln>;
type ConcreteRestyleDamage = RestyleDamage;
type ConcreteChildrenIterator = ServoChildrenIterator<'ln>;
fn to_unsafe(&self) -> UnsafeNode {
unsafe {
@ -147,6 +148,12 @@ impl<'ln> TNode for ServoLayoutNode<'ln> {
self.dump_style_indent(0);
}
fn children(self) -> ServoChildrenIterator<'ln> {
ServoChildrenIterator {
current: self.first_child(),
}
}
fn opaque(&self) -> OpaqueNode {
unsafe { self.get_jsmanaged().opaque() }
}
@ -280,6 +287,19 @@ impl<'ln> TNode for ServoLayoutNode<'ln> {
}
}
pub struct ServoChildrenIterator<'a> {
current: Option<ServoLayoutNode<'a>>,
}
impl<'a> Iterator for ServoChildrenIterator<'a> {
type Item = ServoLayoutNode<'a>;
fn next(&mut self) -> Option<ServoLayoutNode<'a>> {
let node = self.current;
self.current = node.and_then(|node| node.next_sibling());
node
}
}
impl<'ln> LayoutNode for ServoLayoutNode<'ln> {
type ConcreteThreadSafeLayoutNode = ServoThreadSafeLayoutNode<'ln>;