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/* 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::global::GlobalRef;
use dom::bindings::js::Root;
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::bindings::str::{DOMString, USVString};
use dom::globalscope::GlobalScope;
use encoding::EncoderTrap;
use encoding::Encoding;
use encoding::all::UTF_8;
use js::jsapi::{JSContext, JSObject};
use js::jsapi::{JS_GetUint8ArrayData, JS_NewUint8Array};
use libc::uint8_t;
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) -> Root<TextEncoder> {
reflect_dom_object(box TextEncoder::new_inherited(),
global,
TextEncoderBinding::Wrap)
}
// https://encoding.spec.whatwg.org/#dom-textencoder
pub fn Constructor(global: GlobalRef) -> Fallible<Root<TextEncoder>> {
Ok(TextEncoder::new(global.as_global_scope()))
}
}
impl TextEncoderMethods for TextEncoder {
// https://encoding.spec.whatwg.org/#dom-textencoder-encoding
fn Encoding(&self) -> DOMString {
DOMString::from(UTF_8.name())
}
#[allow(unsafe_code)]
// https://encoding.spec.whatwg.org/#dom-textencoder-encode
fn Encode(&self, cx: *mut JSContext, input: USVString) -> NonZero<*mut JSObject> {
unsafe {
let encoded = UTF_8.encode(&input.0, EncoderTrap::Strict).unwrap();
let length = encoded.len() as u32;
rooted!(in(cx) let js_object = JS_NewUint8Array(cx, length));
assert!(!js_object.is_null());
let mut is_shared = false;
let js_object_data: *mut uint8_t = JS_GetUint8ArrayData(js_object.get(), &mut is_shared, ptr::null());
assert!(!is_shared);
ptr::copy_nonoverlapping(encoded.as_ptr(), js_object_data, length as usize);
NonZero::new(js_object.get())
}
}
}
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