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Implement AttrHelpersForLayout for LayoutJS<Attr> rather than Attr itself.

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This commit is contained in:
Ms2ger 2015-06-20 18:51:25 +02:00
parent fa45688191
commit c019897a50
3 changed files with 21 additions and 24 deletions
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19
components/script/dom/attr.rs
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@ -7,7 +7,7 @@ use dom::bindings::codegen::Bindings::AttrBinding::{self, AttrMethods};
use dom::bindings::codegen::InheritTypes::NodeCast;
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, MutNullableHeap};
use dom::bindings::js::{Root, RootedReference};
use dom::bindings::js::{Root, RootedReference, LayoutJS};
use dom::bindings::utils::{Reflector, reflect_dom_object};
use dom::element::{Element, AttributeHandlers};
use dom::window::Window;
@ -313,23 +313,21 @@ pub trait AttrHelpersForLayout {
}
#[allow(unsafe_code)]
impl AttrHelpersForLayout for Attr {
impl AttrHelpersForLayout for LayoutJS<Attr> {
#[inline]
unsafe fn value_forever(&self) -> &'static AttrValue {
// This transmute is used to cheat the lifetime restriction.
mem::transmute::<&AttrValue, &AttrValue>(self.value.borrow_for_layout())
mem::transmute::<&AttrValue, &AttrValue>((*self.unsafe_get()).value.borrow_for_layout())
}
#[inline]
unsafe fn value_ref_forever(&self) -> &'static str {
// This transmute is used to cheat the lifetime restriction.
let value = mem::transmute::<&AttrValue, &AttrValue>(self.value.borrow_for_layout());
&**value
&**self.value_forever()
}
#[inline]
unsafe fn value_atom_forever(&self) -> Option<Atom> {
let value = self.value.borrow_for_layout();
let value = (*self.unsafe_get()).value.borrow_for_layout();
match *value {
AttrValue::Atom(ref val) => Some(val.clone()),
_ => None,
@ -339,8 +337,7 @@ impl AttrHelpersForLayout for Attr {
#[inline]
unsafe fn value_tokens_forever(&self) -> Option<&'static [Atom]> {
// This transmute is used to cheat the lifetime restriction.
let value = mem::transmute::<&AttrValue, &AttrValue>(self.value.borrow_for_layout());
match *value {
match *self.value_forever() {
AttrValue::TokenList(_, ref tokens) => Some(tokens),
_ => None,
}
@ -348,11 +345,11 @@ impl AttrHelpersForLayout for Attr {
#[inline]
unsafe fn local_name_atom_forever(&self) -> Atom {
self.local_name.clone()
(*self.unsafe_get()).local_name.clone()
}
#[inline]
unsafe fn value_for_layout(&self) -> &AttrValue {
self.value.borrow_for_layout()
(*self.unsafe_get()).value.borrow_for_layout()
}
}