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https://gitlab.winehq.org/wine/wine-gecko.git
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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* 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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#include "nsICharsetConverterManager.h"
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#include "nsServiceManagerUtils.h"
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#include "nsEncoderDecoderUtils.h"
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#include "nsTraceRefcnt.h"
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#include "mozilla/dom/EncodingUtils.h"
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using mozilla::dom::EncodingUtils;
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void
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nsHtml5MetaScanner::sniff(nsHtml5ByteReadable* bytes, nsIUnicodeDecoder** decoder, nsACString& charset)
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{
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readable = bytes;
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stateLoop(stateSave);
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readable = nullptr;
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if (mUnicodeDecoder) {
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mUnicodeDecoder.forget(decoder);
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charset.Assign(mCharset);
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}
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}
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bool
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nsHtml5MetaScanner::tryCharset(nsString* charset)
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{
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// This code needs to stay in sync with
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// nsHtml5StreamParser::internalEncodingDeclaration. Unfortunately, the
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// trickery with member fields here leads to some copy-paste reuse. :-(
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nsresult res = NS_OK;
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nsCOMPtr<nsICharsetConverterManager> convManager = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
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if (NS_FAILED(res)) {
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NS_ERROR("Could not get CharsetConverterManager service.");
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return false;
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}
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nsAutoCString encoding;
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CopyUTF16toUTF8(*charset, encoding);
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encoding.Trim(" \t\r\n\f");
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if (encoding.LowerCaseEqualsLiteral("utf-16") ||
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encoding.LowerCaseEqualsLiteral("utf-16be") ||
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encoding.LowerCaseEqualsLiteral("utf-16le")) {
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mCharset.Assign("UTF-8");
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res = convManager->GetUnicodeDecoderRaw(mCharset.get(), getter_AddRefs(mUnicodeDecoder));
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if (NS_FAILED(res)) {
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NS_ERROR("Could not get decoder for UTF-8.");
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return false;
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}
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return true;
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}
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nsAutoCString preferred;
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if (!EncodingUtils::FindEncodingForLabel(encoding, preferred)) {
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return false;
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}
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if (preferred.LowerCaseEqualsLiteral("utf-16") ||
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preferred.LowerCaseEqualsLiteral("utf-16be") ||
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preferred.LowerCaseEqualsLiteral("utf-16le") ||
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preferred.LowerCaseEqualsLiteral("utf-7") ||
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preferred.LowerCaseEqualsLiteral("x-imap4-modified-utf7")) {
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return false;
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}
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res = convManager->GetUnicodeDecoderRaw(preferred.get(), getter_AddRefs(mUnicodeDecoder));
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if (res == NS_ERROR_UCONV_NOCONV) {
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return false;
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} else if (NS_FAILED(res)) {
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NS_ERROR("Getting an encoding decoder failed in a bad way.");
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mUnicodeDecoder = nullptr;
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return false;
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} else {
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NS_ASSERTION(mUnicodeDecoder, "Getter nsresult and object don't match.");
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mCharset.Assign(preferred);
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return true;
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}
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}
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