/* -*- 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/EncodingUtils.h" #include "mozilla/ArrayUtils.h" // ArrayLength #include "nsUConvPropertySearch.h" #include "nsIUnicodeDecoder.h" #include "nsIUnicodeEncoder.h" #include "nsComponentManagerUtils.h" namespace mozilla { namespace dom { static const nsUConvProp labelsEncodings[] = { #include "labelsencodings.properties.h" }; static const nsUConvProp encodingsGroups[] = { #include "encodingsgroups.properties.h" }; bool EncodingUtils::FindEncodingForLabel(const nsACString& aLabel, nsACString& aOutEncoding) { // Save aLabel first because it may refer the same string as aOutEncoding. nsCString label(aLabel); EncodingUtils::TrimSpaceCharacters(label); if (label.IsEmpty()) { aOutEncoding.Truncate(); return false; } ToLowerCase(label); return NS_SUCCEEDED(nsUConvPropertySearch::SearchPropertyValue( labelsEncodings, ArrayLength(labelsEncodings), label, aOutEncoding)); } bool EncodingUtils::FindEncodingForLabelNoReplacement(const nsACString& aLabel, nsACString& aOutEncoding) { if(!FindEncodingForLabel(aLabel, aOutEncoding)) { return false; } if (aOutEncoding.EqualsLiteral("replacement")) { aOutEncoding.Truncate(); return false; } return true; } bool EncodingUtils::IsAsciiCompatible(const nsACString& aPreferredName) { // HZ and UTF-7 are no longer in mozilla-central, but keeping them here // just in case for the benefit of comm-central. return !(aPreferredName.LowerCaseEqualsLiteral("utf-16") || aPreferredName.LowerCaseEqualsLiteral("utf-16be") || aPreferredName.LowerCaseEqualsLiteral("utf-16le") || aPreferredName.LowerCaseEqualsLiteral("replacement") || aPreferredName.LowerCaseEqualsLiteral("hz-gb-2312") || aPreferredName.LowerCaseEqualsLiteral("utf-7") || aPreferredName.LowerCaseEqualsLiteral("x-imap4-modified-utf7")); } already_AddRefed<nsIUnicodeDecoder> EncodingUtils::DecoderForEncoding(const nsACString& aEncoding) { nsAutoCString contractId(NS_UNICODEDECODER_CONTRACTID_BASE); contractId.Append(aEncoding); nsCOMPtr<nsIUnicodeDecoder> decoder = do_CreateInstance(contractId.get()); MOZ_ASSERT(decoder, "Tried to create decoder for unknown encoding."); return decoder.forget(); } already_AddRefed<nsIUnicodeEncoder> EncodingUtils::EncoderForEncoding(const nsACString& aEncoding) { nsAutoCString contractId(NS_UNICODEENCODER_CONTRACTID_BASE); contractId.Append(aEncoding); nsCOMPtr<nsIUnicodeEncoder> encoder = do_CreateInstance(contractId.get()); MOZ_ASSERT(encoder, "Tried to create encoder for unknown encoding."); return encoder.forget(); } void EncodingUtils::LangGroupForEncoding(const nsACString& aEncoding, nsACString& aOutGroup) { if (NS_FAILED(nsUConvPropertySearch::SearchPropertyValue( encodingsGroups, ArrayLength(encodingsGroups), aEncoding, aOutGroup))) { aOutGroup.AssignLiteral("x-unicode"); } } } // namespace dom } // namespace mozilla