mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
|
|
#include "mozilla/dom/TextEncoder.h"
|
|
#include "mozilla/dom/EncodingUtils.h"
|
|
#include "nsContentUtils.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
void
|
|
TextEncoder::Init(const nsAString& aEncoding, ErrorResult& aRv)
|
|
{
|
|
nsAutoString label(aEncoding);
|
|
EncodingUtils::TrimSpaceCharacters(label);
|
|
|
|
// Let encoding be the result of getting an encoding from label.
|
|
// If encoding is failure, or is none of utf-8, utf-16, and utf-16be,
|
|
// throw a RangeError (https://encoding.spec.whatwg.org/#dom-textencoder).
|
|
if (!EncodingUtils::FindEncodingForLabel(label, mEncoding)) {
|
|
aRv.ThrowRangeError<MSG_ENCODING_NOT_SUPPORTED>(&label);
|
|
return;
|
|
}
|
|
|
|
if (!mEncoding.EqualsLiteral("UTF-8") &&
|
|
!mEncoding.EqualsLiteral("UTF-16LE") &&
|
|
!mEncoding.EqualsLiteral("UTF-16BE")) {
|
|
aRv.ThrowRangeError<MSG_DOM_ENCODING_NOT_UTF>();
|
|
return;
|
|
}
|
|
|
|
// Create an encoder object for mEncoding.
|
|
mEncoder = EncodingUtils::EncoderForEncoding(mEncoding);
|
|
}
|
|
|
|
void
|
|
TextEncoder::Encode(JSContext* aCx,
|
|
JS::Handle<JSObject*> aObj,
|
|
const nsAString& aString,
|
|
JS::MutableHandle<JSObject*> aRetval,
|
|
ErrorResult& aRv)
|
|
{
|
|
// Run the steps of the encoding algorithm.
|
|
int32_t srcLen = aString.Length();
|
|
int32_t maxLen;
|
|
const char16_t* data = aString.BeginReading();
|
|
nsresult rv = mEncoder->GetMaxLength(data, srcLen, &maxLen);
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
return;
|
|
}
|
|
// Need a fallible allocator because the caller may be a content
|
|
// and the content can specify the length of the string.
|
|
nsAutoArrayPtr<char> buf(new (fallible) char[maxLen + 1]);
|
|
if (!buf) {
|
|
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return;
|
|
}
|
|
|
|
int32_t dstLen = maxLen;
|
|
rv = mEncoder->Convert(data, &srcLen, buf, &dstLen);
|
|
|
|
// Now reset the encoding algorithm state to the default values for encoding.
|
|
int32_t finishLen = maxLen - dstLen;
|
|
rv = mEncoder->Finish(buf + dstLen, &finishLen);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
dstLen += finishLen;
|
|
}
|
|
|
|
JSObject* outView = nullptr;
|
|
if (NS_SUCCEEDED(rv)) {
|
|
buf[dstLen] = '\0';
|
|
JSAutoCompartment ac(aCx, aObj);
|
|
outView = Uint8Array::Create(aCx, dstLen,
|
|
reinterpret_cast<uint8_t*>(buf.get()));
|
|
if (!outView) {
|
|
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
aRv.Throw(rv);
|
|
}
|
|
aRetval.set(outView);
|
|
}
|
|
|
|
void
|
|
TextEncoder::GetEncoding(nsAString& aEncoding)
|
|
{
|
|
CopyASCIItoUTF16(mEncoding, aEncoding);
|
|
nsContentUtils::ASCIIToLower(aEncoding);
|
|
}
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|