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88 lines
3.1 KiB
Rust
88 lines
3.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::TextEncoderBinding;
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use dom::bindings::codegen::Bindings::TextEncoderBinding::TextEncoderMethods;
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use dom::bindings::error::Error::Range;
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use dom::bindings::error::Fallible;
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use dom::bindings::global::GlobalRef;
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use dom::bindings::js::Root;
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use dom::bindings::str::USVString;
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use dom::bindings::utils::{Reflector, reflect_dom_object};
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use encoding::label::encoding_from_whatwg_label;
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use encoding::types::EncodingRef;
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use encoding::{Encoding, EncoderTrap};
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use js::jsapi::{JSContext, JSObject};
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use js::jsapi::{JS_NewUint8Array, JS_GetUint8ArrayData};
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use libc::uint8_t;
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use std::borrow::ToOwned;
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use std::ptr;
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use util::str::DOMString;
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#[dom_struct]
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pub struct TextEncoder {
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reflector_: Reflector,
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encoding: DOMString,
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#[ignore_heap_size_of = "Defined in rust-encoding"]
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encoder: EncodingRef,
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}
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impl TextEncoder {
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fn new_inherited(encoding: DOMString, encoder: EncodingRef) -> TextEncoder {
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TextEncoder {
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reflector_: Reflector::new(),
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encoding: encoding,
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encoder: encoder,
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}
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}
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pub fn new(global: GlobalRef, encoding: DOMString, encoder: EncodingRef) -> Root<TextEncoder> {
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reflect_dom_object(box TextEncoder::new_inherited(encoding, encoder),
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global,
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TextEncoderBinding::Wrap)
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}
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// https://encoding.spec.whatwg.org/#dom-textencoder
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pub fn Constructor(global: GlobalRef,
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label: DOMString) -> Fallible<Root<TextEncoder>> {
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let encoding = match encoding_from_whatwg_label(&label) {
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Some(enc) => enc,
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None => {
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debug!("Encoding Label Not Supported");
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return Err(Range("The given encoding is not supported.".to_owned()))
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}
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};
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match encoding.name() {
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"utf-8" | "utf-16be" | "utf-16le" => {
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Ok(TextEncoder::new(global, encoding.name().to_owned(), encoding))
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}
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_ => {
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debug!("Encoding Not UTF");
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Err(Range("The encoding must be utf-8, utf-16le, or utf-16be.".to_owned()))
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}
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}
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}
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}
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impl TextEncoderMethods for TextEncoder {
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// https://encoding.spec.whatwg.org/#dom-textencoder-encoding
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fn Encoding(&self) -> DOMString {
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self.encoding.clone()
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}
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#[allow(unsafe_code)]
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// https://encoding.spec.whatwg.org/#dom-textencoder-encode
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fn Encode(&self, cx: *mut JSContext, input: USVString) -> *mut JSObject {
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unsafe {
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let encoded = self.encoder.encode(&input.0, EncoderTrap::Strict).unwrap();
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let length = encoded.len() as u32;
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let js_object: *mut JSObject = JS_NewUint8Array(cx, length);
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let js_object_data: *mut uint8_t = JS_GetUint8ArrayData(js_object, ptr::null());
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ptr::copy_nonoverlapping(encoded.as_ptr(), js_object_data, length as usize);
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js_object
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}
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}
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}
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