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Simplify PrecedingNodeIterator::next().

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This commit is contained in:
Ms2ger 2016-04-11 10:29:32 +02:00
parent 0d732ebb5f
commit 71f56d6744
1 changed files with 11 additions and 25 deletions
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36
components/script/dom/node.rs
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@ -1166,34 +1166,20 @@ impl Iterator for PrecedingNodeIterator {
Some(current) => current,
};
if self.root == current {
self.current = None;
return None
}
let node = current;
if let Some(previous_sibling) = node.GetPreviousSibling() {
self.current = if self.root == current {
None
} else if let Some(previous_sibling) = current.GetPreviousSibling() {
if self.root == previous_sibling {
self.current = None;
return None
None
} else if let Some(last_child) = previous_sibling.descending_last_children().last() {
Some(last_child)
} else {
Some(previous_sibling)
}
if let Some(last_child) = previous_sibling.descending_last_children().last() {
self.current = Some(last_child);
return previous_sibling.descending_last_children().last()
}
self.current = Some(previous_sibling);
return node.GetPreviousSibling()
} else {
current.GetParentNode()
};
if let Some(parent_node) = node.GetParentNode() {
self.current = Some(parent_node);
return node.GetParentNode()
}
self.current = None;
None
self.current.clone()
}
}