Make Element.set_attr require an AbstractNode so we can always downcast.

src/components/script/dom/bindings/codegen/Bindings.conf

@@ -171,7 +171,7 @@ DOMInterfaces = {
 'Element': {
     'nativeType': 'AbstractNode<ScriptView>',
     'pointerType': '',
-    'needsAbstract': ['getClientRects', 'getBoundingClientRect']
+    'needsAbstract': ['getClientRects', 'getBoundingClientRect', 'setAttribute']
 },
 
 'Event': {
@@ -588,7 +588,7 @@ addHTMLElement('HTMLHeadElement')
 addHTMLElement('HTMLHeadingElement')
 addHTMLElement('HTMLHtmlElement')
 addHTMLElement('HTMLHRElement')
-addHTMLElement('HTMLIFrameElement')
+addHTMLElement('HTMLIFrameElement', needsAbstract=['sandbox'])
 addHTMLElement('HTMLImageElement', needsAbstract=['width', 'height'])
 addHTMLElement('HTMLInputElement')
 addHTMLElement('HTMLLabelElement')

src/components/script/dom/bindings/codegen/CodegenRust.py

@@ -3140,8 +3140,8 @@ class CGSetterCall(CGPerSignatureCall):
     A class to generate a native object setter call for a particular IDL
     setter.
     """
-    def __init__(self, argType, nativeMethodName, descriptor, attr):
-        CGPerSignatureCall.__init__(self, None, [],
+    def __init__(self, argsPre, argType, nativeMethodName, descriptor, attr):
+        CGPerSignatureCall.__init__(self, None, argsPre,
                                     [FakeArgument(argType, attr)],
                                     nativeMethodName, False, descriptor, attr,
                                     setter=True)
@@ -3357,9 +3357,16 @@ class CGSpecializedSetter(CGAbstractExternMethod):
     def definition_body(self):
         name = self.attr.identifier.name
         nativeName = "Set" + MakeNativeName(self.descriptor.binaryNames.get(name, name))
-        return CGWrapper(CGIndenter(CGSetterCall(self.attr.type, nativeName,
+        argsPre = []
+        extraPre = ''
+        if name in self.descriptor.needsAbstract:
+            abstractName = re.sub(r'<\w+>', '', self.descriptor.nativeType)
+            extraPre = '  let abstract_this = %s::from_box(this);\n' % abstractName
+            argsPre = ['abstract_this']
+        return CGWrapper(CGIndenter(CGSetterCall(argsPre, self.attr.type, nativeName,
                                                  self.descriptor, self.attr)),
-                         pre="  let obj = (*obj.unnamed);\n" +
+                         pre=extraPre +
+                             "  let obj = (*obj.unnamed);\n" +
                              "  let this = &mut (*this).payload;\n").define()
 
 def infallibleForMember(member, type, descriptorProvider):

src/components/script/dom/element.rs

@@ -139,7 +139,10 @@ impl<'self> Element {
         return None;
     }
 
-    pub fn set_attr(&mut self, raw_name: &DOMString, raw_value: &DOMString) {
+    pub fn set_attr(&mut self,
+                    abstract_self: AbstractNode<ScriptView>,
+                    raw_name: &DOMString,
+                    raw_value: &DOMString) {
         let name = raw_name.to_str();
         let value_cell = Cell::new(raw_value.to_str());
         let mut found = false;
@@ -163,8 +166,8 @@ impl<'self> Element {
 
         //XXXjdm We really need something like a vtable so we can call AfterSetAttr.
         //       This hardcoding is awful.
-        if self.parent.abstract.unwrap().is_iframe_element() {
-            do self.parent.abstract.unwrap().with_mut_iframe_element |iframe| {
+        if abstract_self.is_iframe_element() {
+            do abstract_self.with_mut_iframe_element |iframe| {
                 iframe.AfterSetAttr(raw_name, raw_value);
             }
         }
@@ -208,8 +211,12 @@ impl Element {
         null_string
     }
 
-    pub fn SetAttribute(&mut self, name: &DOMString, value: &DOMString, _rv: &mut ErrorResult) {
-        self.set_attr(name, value);
+    pub fn SetAttribute(&mut self,
+                        abstract_self: AbstractNode<ScriptView>,
+                        name: &DOMString,
+                        value: &DOMString,
+                        _rv: &mut ErrorResult) {
+        self.set_attr(abstract_self, name, value);
     }
 
     pub fn SetAttributeNS(&self, _namespace: &DOMString, _localname: &DOMString, _value: &DOMString, _rv: &mut ErrorResult) {

src/components/script/dom/htmliframeelement.rs

@@ -5,6 +5,7 @@
 use dom::bindings::utils::{DOMString, null_string, ErrorResult, str};
 use dom::document::AbstractDocument;
 use dom::htmlelement::HTMLElement;
+use dom::node::{AbstractNode, ScriptView};
 use dom::windowproxy::WindowProxy;
 use geom::size::Size2D;
 use geom::rect::Rect;
@@ -79,13 +80,13 @@ impl HTMLIFrameElement {
     pub fn SetName(&mut self, _name: &DOMString, _rv: &mut ErrorResult) {
     }
 
-    pub fn Sandbox(&self) -> DOMString {
+    pub fn Sandbox(&self, _abstract_self: AbstractNode<ScriptView>) -> DOMString {
         self.parent.parent.GetAttribute(&str(~"sandbox"))
     }
 
-    pub fn SetSandbox(&mut self, sandbox: &DOMString) {
+    pub fn SetSandbox(&mut self, abstract_self: AbstractNode<ScriptView>, sandbox: &DOMString) {
         let mut rv = Ok(());
-        self.parent.parent.SetAttribute(&str(~"sandbox"), sandbox, &mut rv);
+        self.parent.parent.SetAttribute(abstract_self, &str(~"sandbox"), sandbox, &mut rv);
     }
 
     pub fn AfterSetAttr(&mut self, name: &DOMString, value: &DOMString) {

src/components/script/dom/htmlimageelement.rs

@@ -79,9 +79,13 @@ impl HTMLImageElement {
         }
     }
 
-    pub fn SetWidth(&mut self, width: u32, _rv: &mut ErrorResult) {
+    pub fn SetWidth(&mut self,
+                    abstract_self: AbstractNode<ScriptView>,
+                    width: u32,
+                    _rv: &mut ErrorResult) {
         let node = &mut self.parent.parent;
-        node.set_attr(&str(~"width"),
+        node.set_attr(abstract_self,
+                      &str(~"width"),
                       &str(width.to_str()));
     }
 
@@ -114,9 +118,13 @@ impl HTMLImageElement {
         }
     }
 
-    pub fn SetHeight(&mut self, height: u32, _rv: &mut ErrorResult) {
+    pub fn SetHeight(&mut self,
+                     abstract_self: AbstractNode<ScriptView>,
+                     height: u32,
+                     _rv: &mut ErrorResult) {
         let node = &mut self.parent.parent;
-        node.set_attr(&str(~"height"),
+        node.set_attr(abstract_self,
+                      &str(~"height"),
                       &str(height.to_str()));
     }
 

src/components/script/html/hubbub_html_parser.rs

@@ -375,7 +375,7 @@ pub fn parse_html(cx: *JSContext,
             debug!("-- attach attrs");
             do node.as_mut_element |element| {
                 for attr in tag.attributes.iter() {
-                    element.set_attr(&str(attr.name.clone()), &str(attr.value.clone()));
+                    element.set_attr(node, &str(attr.name.clone()), &str(attr.value.clone()));
                 }
             }