servo/components/script/dom/gamepadbuttonlist.rs
Simon Sapin aa15dc269f Remove use of unstable box syntax.
http://www.robohornet.org gives a score of 101.36 on master,
and 102.68 with this PR. The latter is slightly better,
but probably within noise level.
So it looks like this PR does not affect DOM performance.

This is expected since `Box::new` is defined as:

```rust
impl<T> Box<T> {
    #[inline(always)]
    pub fn new(x: T) -> Box<T> {
        box x
    }
}
```

With inlining, it should compile to the same as box syntax.
2017-10-16 17:16:20 +02:00

63 lines
2.3 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::GamepadButtonListBinding;
use dom::bindings::codegen::Bindings::GamepadButtonListBinding::GamepadButtonListMethods;
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::bindings::root::{Dom, DomRoot, RootedReference};
use dom::gamepadbutton::GamepadButton;
use dom::globalscope::GlobalScope;
use dom_struct::dom_struct;
use webvr_traits::WebVRGamepadButton;
// https://w3c.github.io/gamepad/#gamepadbutton-interface
#[dom_struct]
pub struct GamepadButtonList {
reflector_: Reflector,
list: Vec<Dom<GamepadButton>>
}
impl GamepadButtonList {
#[allow(unrooted_must_root)]
fn new_inherited(list: &[&GamepadButton]) -> GamepadButtonList {
GamepadButtonList {
reflector_: Reflector::new(),
list: list.iter().map(|button| Dom::from_ref(*button)).collect(),
}
}
pub fn new_from_vr(global: &GlobalScope, buttons: &[WebVRGamepadButton]) -> DomRoot<GamepadButtonList> {
rooted_vec!(let list <- buttons.iter()
.map(|btn| GamepadButton::new(&global, btn.pressed, btn.touched)));
reflect_dom_object(Box::new(GamepadButtonList::new_inherited(list.r())),
global,
GamepadButtonListBinding::Wrap)
}
pub fn sync_from_vr(&self, vr_buttons: &[WebVRGamepadButton]) {
let mut index = 0;
for btn in vr_buttons {
self.list.get(index).as_ref().unwrap().update(btn.pressed, btn.touched);
index += 1;
}
}
}
impl GamepadButtonListMethods for GamepadButtonList {
// https://w3c.github.io/gamepad/#dom-gamepad-buttons
fn Length(&self) -> u32 {
self.list.len() as u32
}
// https://w3c.github.io/gamepad/#dom-gamepad-buttons
fn Item(&self, index: u32) -> Option<DomRoot<GamepadButton>> {
self.list.get(index as usize).map(|button| DomRoot::from_ref(&**button))
}
// https://w3c.github.io/gamepad/#dom-gamepad-buttons
fn IndexedGetter(&self, index: u32) -> Option<DomRoot<GamepadButton>> {
self.Item(index)
}
}