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Simplify ThreadSafeLayoutNodeChildrenIterator::next().

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This commit is contained in:
Ms2ger 2015-07-17 18:56:47 +02:00
parent 126f5ae8f0
commit b3892b74f7
1 changed files with 40 additions and 35 deletions
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75
components/layout/wrapper.rs
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@ -670,15 +670,6 @@ impl<'ln> ThreadSafeLayoutNode<'ln> {
}
}
/// Returns the next sibling of this node. Unsafe and private because this can lead to races.
unsafe fn next_sibling(&self) -> Option<ThreadSafeLayoutNode<'ln>> {
if self.pseudo.is_before() {
return self.get_jsmanaged().first_child_ref().map(|node| self.new_with_this_lifetime(&node))
}
self.get_jsmanaged().next_sibling_ref().map(|node| self.new_with_this_lifetime(&node))
}
/// Returns an iterator over this node's children.
pub fn children(&self) -> ThreadSafeLayoutNodeChildrenIterator<'ln> {
ThreadSafeLayoutNodeChildrenIterator {
@ -975,34 +966,48 @@ impl<'a> Iterator for ThreadSafeLayoutNodeChildrenIterator<'a> {
fn next(&mut self) -> Option<ThreadSafeLayoutNode<'a>> {
let node = self.current_node.clone();
match node {
Some(ref node) => {
if node.pseudo.is_after() {
return None
}
self.current_node = if self.parent_node.pseudo == PseudoElementType::Normal {
self.current_node.clone().and_then(|node| {
unsafe {
node.next_sibling()
if let Some(ref node) = node {
self.current_node = match node.pseudo {
PseudoElementType::Before(_) => {
match unsafe { self.parent_node.get_jsmanaged().first_child_ref() } {
Some(first) => {
Some(unsafe {
self.parent_node.new_with_this_lifetime(&first)
})
},
None => {
if self.parent_node.has_after_pseudo() {
let pseudo = PseudoElementType::After(
self.parent_node.get_after_display());
Some(self.parent_node.with_pseudo(pseudo))
} else {
None
}
}
})
} else {
}
},
PseudoElementType::Normal => {
match unsafe { node.get_jsmanaged().next_sibling_ref() } {
Some(next) => {
Some(unsafe {
self.parent_node.new_with_this_lifetime(&next)
})
},
None => {
if self.parent_node.has_after_pseudo() {
let pseudo = PseudoElementType::After(
self.parent_node.get_after_display());
Some(self.parent_node.with_pseudo(pseudo))
} else {
None
}
}
}
},
PseudoElementType::After(_) => {
None
};
}
None => {
if self.parent_node.has_after_pseudo() {
let pseudo_after_node = if self.parent_node.pseudo == PseudoElementType::Normal {
let pseudo = PseudoElementType::After(self.parent_node.get_after_display());
Some(self.parent_node.with_pseudo(pseudo))
} else {
None
};
self.current_node = pseudo_after_node;
return self.current_node.clone()
}
}
},
};
}
node