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Use the try macro for the result of accept_node.

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This commit is contained in:
Ms2ger 2015-02-08 16:28:08 +01:00
parent 2992dbd41b
commit 057b14dd5c
1 changed files with 23 additions and 29 deletions
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52
components/script/dom/treewalker.rs
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@ -160,16 +160,16 @@ impl<'a> PrivateTreeWalkerHelpers for JSRef<'a, TreeWalker> {
None => break,
Some(node) => {
// "1. Filter node and let result be the return value."
match self.accept_node(node) {
Err(e) => return Err(e),
let result = try!(self.accept_node(node));
match result {
// "2. If result is FILTER_ACCEPT, then set the currentNode
// attribute to node and return node."
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
// "3. If result is FILTER_SKIP, run these subsubsteps:"
Ok(NodeFilterConstants::FILTER_SKIP) => {
NodeFilterConstants::FILTER_SKIP => {
// "1. Let child be node's first child if type is first,
// and node's last child if type is last."
match next_child(node) {
@ -247,12 +247,11 @@ impl<'a> PrivateTreeWalkerHelpers for JSRef<'a, TreeWalker> {
// "1. Set node to sibling."
node = sibling_op.unwrap().root().get_unsound_ref_forever();
// "2. Filter node and let result be the return value."
let result = self.accept_node(node);
let result = try!(self.accept_node(node));
// "3. If result is FILTER_ACCEPT, then set the currentNode
// attribute to node and return node."
match result {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
@ -265,7 +264,7 @@ impl<'a> PrivateTreeWalkerHelpers for JSRef<'a, TreeWalker> {
// then set sibling to node's next sibling if type is next,
// and node's previous sibling if type is previous."
match (result, &sibling_op) {
(Ok(NodeFilterConstants::FILTER_REJECT), _)
(NodeFilterConstants::FILTER_REJECT, _)
| (_, &None) => sibling_op = next_sibling(node),
_ => {}
}
@ -278,9 +277,8 @@ impl<'a> PrivateTreeWalkerHelpers for JSRef<'a, TreeWalker> {
// "5. Filter node and if the return value is FILTER_ACCEPT, then return null."
Some(n) => {
node = n;
match self.accept_node(node) {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => return Ok(None),
match try!(self.accept_node(node)) {
NodeFilterConstants::FILTER_ACCEPT => return Ok(None),
_ => {}
}
}
@ -369,9 +367,8 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
node = n.root().get_unsound_ref_forever();
// "2. If node is not null and filtering node returns FILTER_ACCEPT,
// then set the currentNode attribute to node, return node."
match self.accept_node(node) {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
match try!(self.accept_node(node)) {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
@ -432,12 +429,12 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
// "4. If result is FILTER_ACCEPT, then
// set the currentNode attribute to node and return node."
loop {
match self.accept_node(node) {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_REJECT) => break,
let result = try!(self.accept_node(node));
match result {
NodeFilterConstants::FILTER_REJECT => break,
_ if node.first_child().is_some() =>
node = node.last_child().unwrap().root().get_unsound_ref_forever(),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
@ -461,9 +458,8 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
}
// "5. Filter node and if the return value is FILTER_ACCEPT, then
// set the currentNode attribute to node and return node."
match self.accept_node(node) {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
match try!(self.accept_node(node)) {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
@ -479,13 +475,13 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
// "1. Let node be the value of the currentNode attribute."
let mut node = self.current_node.get().root().get_unsound_ref_forever();
// "2. Let result be FILTER_ACCEPT."
let mut result = Ok(NodeFilterConstants::FILTER_ACCEPT);
let mut result = NodeFilterConstants::FILTER_ACCEPT;
// "3. Run these substeps:"
loop {
// "1. While result is not FILTER_REJECT and node has a child, run these subsubsteps:"
loop {
match result {
Ok(NodeFilterConstants::FILTER_REJECT) => break,
NodeFilterConstants::FILTER_REJECT => break,
_ => {}
}
match node.first_child() {
@ -494,12 +490,11 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
// "1. Set node to its first child."
node = child.root().get_unsound_ref_forever();
// "2. Filter node and set result to the return value."
result = self.accept_node(node);
result = try!(self.accept_node(node));
// "3. If result is FILTER_ACCEPT, then
// set the currentNode attribute to node and return node."
match result {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},
@ -516,12 +511,11 @@ impl<'a> TreeWalkerHelpers<'a> for JSRef<'a, TreeWalker> {
Some(n) => {
node = n.root().get_unsound_ref_forever();
// "3. Filter node and set result to the return value."
result = self.accept_node(node);
result = try!(self.accept_node(node));
// "4. If result is FILTER_ACCEPT, then
// set the currentNode attribute to node and return node."
match result {
Err(e) => return Err(e),
Ok(NodeFilterConstants::FILTER_ACCEPT) => {
NodeFilterConstants::FILTER_ACCEPT => {
self.current_node.set(JS::from_rooted(node));
return Ok(Some(Temporary::from_rooted(node)))
},