mirror of
https://github.com/servo/servo.git
synced 2025-06-08 00:23:30 +00:00
99 lines
3.2 KiB
Rust
99 lines
3.2 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::TextDecoderBinding;
|
|
use dom::bindings::codegen::Bindings::TextDecoderBinding::TextDecoderMethods;
|
|
use dom::bindings::error::{Error, Fallible};
|
|
use dom::bindings::global::GlobalRef;
|
|
use dom::bindings::js::{JSRef, Temporary};
|
|
use dom::bindings::str::USVString;
|
|
use dom::bindings::trace::JSTraceable;
|
|
use dom::bindings::utils::{Reflector, reflect_dom_object};
|
|
|
|
use util::str::DOMString;
|
|
|
|
use encoding::Encoding;
|
|
use encoding::types::{EncodingRef, DecoderTrap};
|
|
use encoding::label::encoding_from_whatwg_label;
|
|
use js::jsapi::{JSContext, JSObject};
|
|
use js::jsfriendapi::bindgen::JS_GetObjectAsArrayBufferView;
|
|
|
|
use std::borrow::ToOwned;
|
|
use std::ptr;
|
|
use std::slice;
|
|
|
|
#[dom_struct]
|
|
pub struct TextDecoder {
|
|
reflector_: Reflector,
|
|
encoding: EncodingRef,
|
|
fatal: bool,
|
|
}
|
|
|
|
impl TextDecoder {
|
|
fn new_inherited(encoding: EncodingRef, fatal: bool) -> TextDecoder {
|
|
TextDecoder {
|
|
reflector_: Reflector::new(),
|
|
encoding: encoding,
|
|
fatal: fatal,
|
|
}
|
|
}
|
|
|
|
pub fn new(global: GlobalRef, encoding: EncodingRef, fatal: bool) -> Temporary<TextDecoder> {
|
|
reflect_dom_object(box TextDecoder::new_inherited(encoding, fatal),
|
|
global,
|
|
TextDecoderBinding::Wrap)
|
|
}
|
|
|
|
/// https://encoding.spec.whatwg.org/#dom-textdecoder
|
|
pub fn Constructor(global: GlobalRef,
|
|
label: DOMString,
|
|
options: &TextDecoderBinding::TextDecoderOptions)
|
|
-> Fallible<Temporary<TextDecoder>> {
|
|
let encoding = match encoding_from_whatwg_label(&label) {
|
|
Some(enc) => enc,
|
|
// FIXME: Should throw a RangeError as per spec
|
|
None => return Err(Error::Syntax),
|
|
};
|
|
Ok(TextDecoder::new(global, encoding, options.fatal))
|
|
}
|
|
}
|
|
|
|
impl<'a> TextDecoderMethods for JSRef<'a, TextDecoder> {
|
|
fn Encoding(self) -> DOMString {
|
|
self.encoding.whatwg_name().unwrap().to_owned()
|
|
}
|
|
|
|
fn Fatal(self) -> bool {
|
|
self.fatal
|
|
}
|
|
|
|
#[allow(unsafe_code)]
|
|
fn Decode(self, cx: *mut JSContext, input: Option<*mut JSObject>)
|
|
-> Fallible<USVString> {
|
|
let input = match input {
|
|
Some(input) => input,
|
|
None => return Ok(USVString("".to_owned())),
|
|
};
|
|
|
|
let mut length = 0;
|
|
let mut data = ptr::null_mut();
|
|
if unsafe { JS_GetObjectAsArrayBufferView(cx, input, &mut length, &mut data).is_null() } {
|
|
return Err(Error::Type("Argument to TextDecoder.decode is not an ArrayBufferView".to_owned()));
|
|
}
|
|
|
|
let buffer = unsafe {
|
|
slice::from_raw_parts(data as *const _, length as usize)
|
|
};
|
|
let trap = if self.fatal {
|
|
DecoderTrap::Strict
|
|
} else {
|
|
DecoderTrap::Replace
|
|
};
|
|
match self.encoding.decode(buffer, trap) {
|
|
Ok(s) => Ok(USVString(s)),
|
|
Err(_) => Err(Error::Type("Decoding failed".to_owned())),
|
|
}
|
|
}
|
|
|
|
}
|