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Fixed ParentOffsetBorderBoxIterator's keeping track of parents

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Permutator 2016-08-30 13:09:30 -07:00
parent 014ad76b97
commit 0a5218dc75
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GPG key ID: 62D7A8D792C3B058
1 changed files with 7 additions and 7 deletions
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14
components/layout/query.rs
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@ -447,7 +447,6 @@ struct ParentBorderBoxInfo {
struct ParentOffsetBorderBoxIterator {
node_address: OpaqueNode,
last_level: i32,
has_found_node: bool,
node_border_box: Rect<Au>,
parent_nodes: Vec<Option<ParentBorderBoxInfo>>,
@ -457,7 +456,6 @@ impl ParentOffsetBorderBoxIterator {
fn new(node_address: OpaqueNode) -> ParentOffsetBorderBoxIterator {
ParentOffsetBorderBoxIterator {
node_address: node_address,
last_level: -1,
has_found_node: false,
node_border_box: Rect::zero(),
parent_nodes: Vec::new(),
@ -536,6 +534,10 @@ impl FragmentBorderBoxIterator for UnioningFragmentScrollAreaIterator {
// https://drafts.csswg.org/cssom-view/#extensions-to-the-htmlelement-interface
impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
fn process(&mut self, fragment: &Fragment, level: i32, border_box: &Rect<Au>) {
// Remove all nodes at this level or higher, as they can't be parents of this node.
self.parent_nodes.truncate(level as usize);
assert!(self.parent_nodes.len() == level as usize);
if fragment.node == self.node_address {
// Found the fragment in the flow tree that matches the
// DOM node being looked for.
@ -546,11 +548,11 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
if fragment.style.get_box().position == computed_values::position::T::fixed {
self.parent_nodes.clear();
}
} else if level > self.last_level {
} else {
// TODO(gw): Is there a less fragile way of checking whether this
// fragment is the body element, rather than just checking that
// the parent nodes stack contains the root node only?
let is_body_element = self.parent_nodes.len() == 1;
// it's at level 1 (above the root node)?
let is_body_element = level == 1;
let is_valid_parent = match (is_body_element,
fragment.style.get_box().position,
@ -580,8 +582,6 @@ impl FragmentBorderBoxIterator for ParentOffsetBorderBoxIterator {
};
self.parent_nodes.push(parent_info);
} else if level < self.last_level {
self.parent_nodes.pop();
}
}