Removed unsafe from 'query_selector_iter'

components/script/dom/htmlbuttonelement.rs

@@ -232,13 +232,9 @@ impl<'a> Activatable for &'a HTMLButtonElement {
         if owner.is_none() || elem.click_in_progress() {
             return;
         }
-        // This is safe because we are stopping after finding the first element
-        // and only then performing actions which may modify the DOM tree
-        unsafe {
         node.query_selector_iter("button[type=submit]".to_owned()).unwrap()
             .filter_map(HTMLButtonElementCast::to_root)
             .find(|r| r.r().form_owner() == owner)
             .map(|s| s.r().synthetic_click_activation(ctrlKey, shiftKey, altKey, metaKey));
     }
-    }
 }

components/script/dom/htmlinputelement.rs

@@ -359,12 +359,9 @@ fn broadcast_radio_checked(broadcaster: &HTMLInputElement, group: Option<&Atom>)
     // This function is a workaround for lifetime constraint difficulties.
     fn do_broadcast(doc_node: &Node, broadcaster: &HTMLInputElement,
                         owner: Option<&HTMLFormElement>, group: Option<&Atom>) {
-        // There is no DOM tree manipulation here, so this is safe
+        let iter = doc_node.query_selector_iter("input[type=radio]".to_owned())
-        let iter = unsafe {
+                .unwrap().filter_map(HTMLInputElementCast::to_root)
-            doc_node.query_selector_iter("input[type=radio]".to_owned()).unwrap()
+                .filter(|r| in_same_group(r.r(), owner, group) && broadcaster != r.r());
-                .filter_map(HTMLInputElementCast::to_root)
-                .filter(|r| in_same_group(r.r(), owner, group) && broadcaster != r.r())
-        };
         for ref r in iter {
             if r.r().Checked() {
                 r.r().SetChecked(false);
@@ -714,15 +711,12 @@ impl Activatable for HTMLInputElement {
                     let doc_node = NodeCast::from_ref(doc.r());
                     let group = self.get_radio_group_name();;
 
-                    // Safe since we only manipulate the DOM tree after finding an element
+                    let checked_member = doc_node.query_selector_iter("input[type=radio]".to_owned()).unwrap()
-                    let checked_member = unsafe {
-                        doc_node.query_selector_iter("input[type=radio]".to_owned()).unwrap()
                             .filter_map(HTMLInputElementCast::to_root)
                             .find(|r| {
                                 in_same_group(r.r(), owner.r(), group.as_ref()) &&
                                 r.r().Checked()
-                                })
+                            });
-                    };
                     cache.checked_radio = checked_member.r().map(JS::from_ref);
                     cache.checked_changed = self.checked_changed.get();
                     self.SetChecked(true);
@@ -849,14 +843,10 @@ impl Activatable for HTMLInputElement {
         if elem.click_in_progress() {
             return;
         }
-        // This is safe because we are stopping after finding the first element
-        // and only then performing actions which may modify the DOM tree
         let submit_button;
-        unsafe {
         submit_button = node.query_selector_iter("input[type=submit]".to_owned()).unwrap()
             .filter_map(HTMLInputElementCast::to_root)
             .find(|r| r.r().form_owner() == owner);
-        }
         match submit_button {
             Some(ref button) => {
                 if button.r().is_instance_activatable() {
@@ -864,9 +854,6 @@ impl Activatable for HTMLInputElement {
                 }
             }
             None => {
-                unsafe {
-                    // Safe because we don't perform any DOM modification
-                    // until we're done with the iterator.
                 let inputs = node.query_selector_iter("input".to_owned()).unwrap()
                     .filter_map(HTMLInputElementCast::to_root)
                     .filter(|input| {
@@ -884,8 +871,6 @@ impl Activatable for HTMLInputElement {
                     // lazily test for > 1 submission-blocking inputs
                     return;
                 }
-                }
-
                 form.r().submit(SubmittedFrom::NotFromFormSubmitMethod,
                                 FormSubmitter::FormElement(form.r()));
             }

components/script/dom/node.rs

@@ -345,8 +345,7 @@ pub struct QuerySelectorIterator {
 }
 
 impl<'a> QuerySelectorIterator {
-    #[allow(unsafe_code)]
+     fn new(iter: TreeIterator, selectors: Vec<Selector>)
-    unsafe fn new(iter: TreeIterator, selectors: Vec<Selector>)
                   -> QuerySelectorIterator {
         QuerySelectorIterator {
             selectors: selectors,
@@ -737,8 +736,7 @@ impl Node {
     /// Get an iterator over all nodes which match a set of selectors
     /// Be careful not to do anything which may manipulate the DOM tree
     /// whilst iterating, otherwise the iterator may be invalidated.
-    #[allow(unsafe_code)]
+    pub fn query_selector_iter(&self, selectors: DOMString)
-    pub unsafe fn query_selector_iter(&self, selectors: DOMString)
                                   -> Fallible<QuerySelectorIterator> {
         // Step 1.
         match parse_author_origin_selector_list_from_str(&selectors) {
@@ -755,7 +753,7 @@ impl Node {
     #[allow(unsafe_code)]
     pub fn query_selector_all(&self, selectors: DOMString) -> Fallible<Root<NodeList>> {
         let window = window_from_node(self);
-        let iter = try!(unsafe { self.query_selector_iter(selectors) });
+        let iter = try!(self.query_selector_iter(selectors));
         Ok(NodeList::new_simple_list(window.r(), iter))
     }