servo/components/script/dom/popstateevent.rs
Nicholas Nethercote 4506f0d30c Replace all uses of the heapsize crate with malloc_size_of.
Servo currently uses `heapsize`, but Stylo/Gecko use `malloc_size_of`.
`malloc_size_of` is better -- it handles various cases that `heapsize` does not
-- so this patch changes Servo to use `malloc_size_of`.

This patch makes the following changes to the `malloc_size_of` crate.

- Adds `MallocSizeOf` trait implementations for numerous types, some built-in
  (e.g. `VecDeque`), some external and Servo-only (e.g. `string_cache`).

- Makes `enclosing_size_of_op` optional, because vanilla jemalloc doesn't
  support that operation.

- For `HashSet`/`HashMap`, falls back to a computed estimate when
  `enclosing_size_of_op` isn't available.

- Adds an extern "C" `malloc_size_of` function that does the actual heap
  measurement; this is based on the same functions from the `heapsize` crate.

This patch makes the following changes elsewhere.

- Converts all the uses of `heapsize` to instead use `malloc_size_of`.

- Disables the "heapsize"/"heap_size" feature for the external crates that
  provide it.

- Removes the `HeapSizeOf` implementation from `hashglobe`.

- Adds `ignore` annotations to a few `Rc`/`Arc`, because `malloc_size_of`
  doesn't derive those types, unlike `heapsize`.
2017-10-18 22:20:37 +11:00

81 lines
2.7 KiB
Rust

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use dom::bindings::codegen::Bindings::EventBinding::EventMethods;
use dom::bindings::codegen::Bindings::PopStateEventBinding;
use dom::bindings::codegen::Bindings::PopStateEventBinding::PopStateEventMethods;
use dom::bindings::error::Fallible;
use dom::bindings::inheritance::Castable;
use dom::bindings::reflector::reflect_dom_object;
use dom::bindings::root::DomRoot;
use dom::bindings::str::DOMString;
use dom::bindings::trace::RootedTraceableBox;
use dom::event::Event;
use dom::window::Window;
use dom_struct::dom_struct;
use js::jsapi::{Heap, HandleValue, JSContext};
use js::jsval::JSVal;
use servo_atoms::Atom;
// https://html.spec.whatwg.org/multipage/#the-popstateevent-interface
#[dom_struct]
pub struct PopStateEvent {
event: Event,
#[ignore_malloc_size_of = "Defined in rust-mozjs"]
state: Heap<JSVal>,
}
impl PopStateEvent {
fn new_inherited() -> PopStateEvent {
PopStateEvent {
event: Event::new_inherited(),
state: Heap::default(),
}
}
pub fn new_uninitialized(window: &Window) -> DomRoot<PopStateEvent> {
reflect_dom_object(Box::new(PopStateEvent::new_inherited()),
window,
PopStateEventBinding::Wrap)
}
pub fn new(window: &Window,
type_: Atom,
bubbles: bool,
cancelable: bool,
state: HandleValue)
-> DomRoot<PopStateEvent> {
let ev = PopStateEvent::new_uninitialized(window);
ev.state.set(state.get());
{
let event = ev.upcast::<Event>();
event.init_event(type_, bubbles, cancelable);
}
ev
}
pub fn Constructor(window: &Window,
type_: DOMString,
init: RootedTraceableBox<PopStateEventBinding::PopStateEventInit>)
-> Fallible<DomRoot<PopStateEvent>> {
Ok(PopStateEvent::new(window,
Atom::from(type_),
init.parent.bubbles,
init.parent.cancelable,
init.state.handle()))
}
}
impl PopStateEventMethods for PopStateEvent {
#[allow(unsafe_code)]
// https://html.spec.whatwg.org/multipage/#dom-popstateevent-state
unsafe fn State(&self, _cx: *mut JSContext) -> JSVal {
self.state.get()
}
// https://dom.spec.whatwg.org/#dom-event-istrusted
fn IsTrusted(&self) -> bool {
self.event.IsTrusted()
}
}