Struct script::dom::window::LayoutValue

pub struct LayoutValue<T: JSTraceable + MallocSizeOf> {
    is_valid: Rc<Cell<bool>>,
    value: T,
}

An instance of a value associated with a particular snapshot of layout. This stored value can only be read as long as the associated layout marker that is considered valid. It will automatically become unavailable when the next layout operation is performed.

Fields

is_valid: Rc<Cell<bool>>

value: T

Implementations

impl<T: Copy + JSTraceable + MallocSizeOf> LayoutValue<T>

fn new(marker: Rc<Cell<bool>>, value: T) -> Self

pub fn get(&self) -> Result<T, ()>

Retrieve the stored value if it is still valid.

Trait Implementations

impl<T> JSTraceable for LayoutValue<T>where
    T: JSTraceable + JSTraceable + MallocSizeOf,

unsafe fn trace(&self, tracer: *mut JSTracer)

Trace self.

impl<T> MallocSizeOf for LayoutValue<T>where
    T: MallocSizeOf + JSTraceable + MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.