parser/html/nsHtml5MetaScannerCppSupplement.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "nsISupportsImpl.h"
   6
   7 #include "mozilla/Encoding.h"
   8
   9 const mozilla::Encoding* nsHtml5MetaScanner::sniff(nsHtml5ByteReadable* bytes) {
  10   readable = bytes;
  11   stateLoop(stateSave);
  12   readable = nullptr;
  13   return mEncoding;
  14 }
  15
  16 bool nsHtml5MetaScanner::tryCharset(nsHtml5String charset) {
  17   // This code needs to stay in sync with
  18   // nsHtml5StreamParser::internalEncodingDeclaration. Unfortunately, the
  19   // trickery with member fields here leads to some copy-paste reuse. :-(
  20   nsAutoCString label;
  21   nsString charset16;  // Not Auto, because using it to hold nsStringBuffer*
  22   charset.ToString(charset16);
  23   CopyUTF16toUTF8(charset16, label);
  24   const mozilla::Encoding* encoding = Encoding::ForLabel(label);
  25   if (!encoding) {
  26     return false;
  27   }
  28   if (encoding == UTF_16BE_ENCODING || encoding == UTF_16LE_ENCODING) {
  29     mEncoding = UTF_8_ENCODING;
  30     return true;
  31   }
  32   if (encoding == X_USER_DEFINED_ENCODING) {
  33     // WebKit/Blink hack for Indian and Armenian legacy sites
  34     mEncoding = WINDOWS_1252_ENCODING;
  35     return true;
  36   }
  37   mEncoding = encoding;
  38   return true;
  39 }