servo/components/script/dom/textencoder.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

58 lines
1.9 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 core::nonzero::NonZero;
use dom::bindings::codegen::Bindings::TextEncoderBinding;
use dom::bindings::codegen::Bindings::TextEncoderBinding::TextEncoderMethods;
use dom::bindings::error::Fallible;
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::bindings::root::DomRoot;
use dom::bindings::str::{DOMString, USVString};
use dom::globalscope::GlobalScope;
use dom_struct::dom_struct;
use js::jsapi::{JSContext, JSObject};
use js::typedarray::{Uint8Array, CreateWith};
use std::ptr;
#[dom_struct]
pub struct TextEncoder {
reflector_: Reflector,
}
impl TextEncoder {
fn new_inherited() -> TextEncoder {
TextEncoder {
reflector_: Reflector::new(),
}
}
pub fn new(global: &GlobalScope) -> DomRoot<TextEncoder> {
reflect_dom_object(Box::new(TextEncoder::new_inherited()),
global,
TextEncoderBinding::Wrap)
}
// https://encoding.spec.whatwg.org/#dom-textencoder
pub fn Constructor(global: &GlobalScope) -> Fallible<DomRoot<TextEncoder>> {
Ok(TextEncoder::new(global))
}
}
impl TextEncoderMethods for TextEncoder {
// https://encoding.spec.whatwg.org/#dom-textencoder-encoding
fn Encoding(&self) -> DOMString {
DOMString::from("utf-8")
}
#[allow(unsafe_code)]
// https://encoding.spec.whatwg.org/#dom-textencoder-encode
unsafe fn Encode(&self, cx: *mut JSContext, input: USVString) -> NonZero<*mut JSObject> {
let encoded = input.0.as_bytes();
rooted!(in(cx) let mut js_object = ptr::null_mut());
assert!(Uint8Array::create(cx, CreateWith::Slice(&encoded), js_object.handle_mut()).is_ok());
NonZero::new_unchecked(js_object.get())
}
}