1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/encoding/EncodingUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,73 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#include "mozilla/dom/EncodingUtils.h"
1.9 +
1.10 +#include "mozilla/ArrayUtils.h" // ArrayLength
1.11 +#include "nsUConvPropertySearch.h"
1.12 +#include "nsIUnicodeDecoder.h"
1.13 +#include "nsIUnicodeEncoder.h"
1.14 +#include "nsComponentManagerUtils.h"
1.15 +
1.16 +namespace mozilla {
1.17 +namespace dom {
1.18 +
1.19 +static const char* labelsEncodings[][3] = {
1.20 +#include "labelsencodings.properties.h"
1.21 +};
1.22 +
1.23 +bool
1.24 +EncodingUtils::FindEncodingForLabel(const nsACString& aLabel,
1.25 + nsACString& aOutEncoding)
1.26 +{
1.27 + // Save aLabel first because it may refer the same string as aOutEncoding.
1.28 + nsCString label(aLabel);
1.29 +
1.30 + EncodingUtils::TrimSpaceCharacters(label);
1.31 + if (label.IsEmpty()) {
1.32 + aOutEncoding.Truncate();
1.33 + return false;
1.34 + }
1.35 +
1.36 + ToLowerCase(label);
1.37 + return NS_SUCCEEDED(nsUConvPropertySearch::SearchPropertyValue(
1.38 + labelsEncodings, ArrayLength(labelsEncodings), label, aOutEncoding));
1.39 +}
1.40 +
1.41 +bool
1.42 +EncodingUtils::IsAsciiCompatible(const nsACString& aPreferredName)
1.43 +{
1.44 + return !(aPreferredName.LowerCaseEqualsLiteral("utf-16") ||
1.45 + aPreferredName.LowerCaseEqualsLiteral("utf-16be") ||
1.46 + aPreferredName.LowerCaseEqualsLiteral("utf-16le") ||
1.47 + aPreferredName.LowerCaseEqualsLiteral("replacement") ||
1.48 + aPreferredName.LowerCaseEqualsLiteral("hz-gb-2312") ||
1.49 + aPreferredName.LowerCaseEqualsLiteral("utf-7") ||
1.50 + aPreferredName.LowerCaseEqualsLiteral("x-imap4-modified-utf7"));
1.51 +}
1.52 +
1.53 +already_AddRefed<nsIUnicodeDecoder>
1.54 +EncodingUtils::DecoderForEncoding(const nsACString& aEncoding)
1.55 +{
1.56 + nsAutoCString contractId(NS_UNICODEDECODER_CONTRACTID_BASE);
1.57 + contractId.Append(aEncoding);
1.58 +
1.59 + nsCOMPtr<nsIUnicodeDecoder> decoder = do_CreateInstance(contractId.get());
1.60 + MOZ_ASSERT(decoder, "Tried to create decoder for unknown encoding.");
1.61 + return decoder.forget();
1.62 +}
1.63 +
1.64 +already_AddRefed<nsIUnicodeEncoder>
1.65 +EncodingUtils::EncoderForEncoding(const nsACString& aEncoding)
1.66 +{
1.67 + nsAutoCString contractId(NS_UNICODEENCODER_CONTRACTID_BASE);
1.68 + contractId.Append(aEncoding);
1.69 +
1.70 + nsCOMPtr<nsIUnicodeEncoder> encoder = do_CreateInstance(contractId.get());
1.71 + MOZ_ASSERT(encoder, "Tried to create encoder for unknown encoding.");
1.72 + return encoder.forget();
1.73 +}
1.74 +
1.75 +} // namespace dom
1.76 +} // namespace mozilla
