mirror of
https://github.com/servo/servo.git
synced 2025-08-03 04:30:10 +01:00
Introduce LayoutJS<T>
This commit is contained in:
parent
1d7b1e5c31
commit
a5d7240534
2 changed files with 67 additions and 4 deletions
|
@ -129,8 +129,25 @@ pub struct JS<T> {
|
|||
ptr: NonZero<*const T>
|
||||
}
|
||||
|
||||
impl<T> JS<T> {
|
||||
/// Returns `LayoutJS<T>` containing the same pointer.
|
||||
fn to_layout(self) -> LayoutJS<T> {
|
||||
LayoutJS {
|
||||
ptr: self.ptr.clone()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// This is specialized `JS<T>` to use in under `layout` crate.
|
||||
/// `Layout*Helpers` traits must be implemented on this.
|
||||
pub struct LayoutJS<T> {
|
||||
ptr: NonZero<*const T>
|
||||
}
|
||||
|
||||
impl<T> Copy for JS<T> {}
|
||||
|
||||
impl<T> Copy for LayoutJS<T> {}
|
||||
|
||||
impl<T> PartialEq for JS<T> {
|
||||
#[allow(unrooted_must_root)]
|
||||
fn eq(&self, other: &JS<T>) -> bool {
|
||||
|
@ -138,6 +155,13 @@ impl<T> PartialEq for JS<T> {
|
|||
}
|
||||
}
|
||||
|
||||
impl<T> PartialEq for LayoutJS<T> {
|
||||
#[allow(unrooted_must_root)]
|
||||
fn eq(&self, other: &LayoutJS<T>) -> bool {
|
||||
self.ptr == other.ptr
|
||||
}
|
||||
}
|
||||
|
||||
impl <T> Clone for JS<T> {
|
||||
#[inline]
|
||||
fn clone(&self) -> JS<T> {
|
||||
|
@ -147,6 +171,15 @@ impl <T> Clone for JS<T> {
|
|||
}
|
||||
}
|
||||
|
||||
impl <T> Clone for LayoutJS<T> {
|
||||
#[inline]
|
||||
fn clone(&self) -> LayoutJS<T> {
|
||||
LayoutJS {
|
||||
ptr: self.ptr.clone()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl JS<Node> {
|
||||
/// Create a new JS-owned value wrapped from an address known to be a `Node` pointer.
|
||||
pub unsafe fn from_trusted_node_address(inner: TrustedNodeAddress) -> JS<Node> {
|
||||
|
@ -198,6 +231,15 @@ impl<T: Reflectable> Reflectable for JS<T> {
|
|||
}
|
||||
}
|
||||
|
||||
// XXXjdm same above
|
||||
impl<T: Reflectable> Reflectable for LayoutJS<T> {
|
||||
fn reflector<'a>(&'a self) -> &'a Reflector {
|
||||
unsafe {
|
||||
(*self.unsafe_get()).reflector()
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// A trait to be implemented for JS-managed types that can be stored in
|
||||
/// mutable member fields.
|
||||
///
|
||||
|
@ -296,6 +338,12 @@ impl<T: Reflectable> MutNullableJS<T> {
|
|||
self.ptr.get()
|
||||
}
|
||||
|
||||
/// Retrieve a copy of the inner optional `JS<T>` as `LayoutJS<T>`.
|
||||
/// For use by layout, which can't use safe types like Temporary.
|
||||
pub unsafe fn get_inner_as_layout(&self) -> Option<LayoutJS<T>> {
|
||||
self.get_inner().map(|js| js.to_layout())
|
||||
}
|
||||
|
||||
/// Retrieve a copy of the current inner value. If it is `None`, it is
|
||||
/// initialized with the result of `cb` first.
|
||||
pub fn or_init<F>(&self, cb: F) -> Temporary<T>
|
||||
|
@ -313,9 +361,8 @@ impl<T: Reflectable> MutNullableJS<T> {
|
|||
}
|
||||
|
||||
impl<T: Reflectable> JS<T> {
|
||||
/// Returns an unsafe pointer to the interior of this object. This is the
|
||||
/// only method that be safely accessed from layout. (The fact that this is
|
||||
/// unsafe is what necessitates the layout wrappers.)
|
||||
/// Returns an unsafe pointer to the interior of this object.
|
||||
/// This should only be used by the DOM bindings.
|
||||
pub unsafe fn unsafe_get(&self) -> *const T {
|
||||
*self.ptr
|
||||
}
|
||||
|
@ -328,6 +375,15 @@ impl<T: Reflectable> JS<T> {
|
|||
}
|
||||
}
|
||||
|
||||
impl<T: Reflectable> LayoutJS<T> {
|
||||
/// Returns an unsafe pointer to the interior of this JS object without touching the borrow
|
||||
/// flags. This is the only method that be safely accessed from layout. (The fact that this
|
||||
/// is unsafe is what necessitates the layout wrappers.)
|
||||
pub unsafe fn unsafe_get(&self) -> *const T {
|
||||
*self.ptr
|
||||
}
|
||||
}
|
||||
|
||||
impl<From> JS<From> {
|
||||
/// Return `self` as a `JS` of another type.
|
||||
//XXXjdm It would be lovely if this could be private.
|
||||
|
@ -341,6 +397,12 @@ impl<From> JS<From> {
|
|||
}
|
||||
}
|
||||
|
||||
impl<From> LayoutJS<From> {
|
||||
/// Return `self` as a `LayoutJS` of another type.
|
||||
pub unsafe fn transmute_copy<To>(&self) -> LayoutJS<To> {
|
||||
mem::transmute_copy(self)
|
||||
}
|
||||
}
|
||||
|
||||
/// Get an `Option<JSRef<T>>` out of an `Option<Root<T>>`
|
||||
pub trait RootedReference<T> {
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue