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32 #include "modules/encoding/TextDecoder.h"
34 #include "bindings/core/v8/ExceptionState.h"
35 #include "core/dom/DOMArrayBufferView.h"
36 #include "core/dom/ExceptionCode.h"
37 #include "wtf/StringExtras.h"
38 #include "wtf/text/TextEncodingRegistry.h"
42 TextDecoder* TextDecoder::create(const String& label, const TextDecoderOptions& options, ExceptionState& exceptionState)
44 WTF::TextEncoding encoding(label);
45 // The replacement encoding is not valid, but the Encoding API also
46 // rejects aliases of the replacement encoding.
47 if (!encoding.isValid() || !strcasecmp(encoding.name(), "replacement")) {
48 exceptionState.throwTypeError("The encoding label provided ('" + label + "') is invalid.");
52 return new TextDecoder(encoding, options.fatal(), options.ignoreBOM());
56 TextDecoder::TextDecoder(const WTF::TextEncoding& encoding, bool fatal, bool ignoreBOM)
57 : m_encoding(encoding)
58 , m_codec(newTextCodec(encoding))
60 , m_ignoreBOM(ignoreBOM)
65 TextDecoder::~TextDecoder()
69 String TextDecoder::encoding() const
71 String name = String(m_encoding.name()).lower();
72 // Where possible, encoding aliases should be handled by changes to Chromium's ICU or Blink's WTF.
73 // The same codec is used, but WTF maintains a different name/identity for these.
74 if (name == "iso-8859-1" || name == "us-ascii")
75 return "windows-1252";
79 String TextDecoder::decode(DOMArrayBufferView* input, const TextDecodeOptions& options, ExceptionState& exceptionState)
81 const char* start = input ? static_cast<const char*>(input->baseAddress()) : 0;
82 size_t length = input ? input->byteLength() : 0;
84 WTF::FlushBehavior flush = options.stream() ? WTF::DoNotFlush : WTF::DataEOF;
86 bool sawError = false;
87 String s = m_codec->decode(start, length, flush, m_fatal, sawError);
89 if (m_fatal && sawError) {
90 exceptionState.throwDOMException(EncodingError, "The encoded data was not valid.");
94 if (!m_ignoreBOM && !m_bomSeen && !s.isEmpty()) {
96 String name(m_encoding.name());
97 if ((name == "UTF-8" || name == "UTF-16LE" || name == "UTF-16BE") && s[0] == 0xFEFF)
107 String TextDecoder::decode(ExceptionState& exceptionState)
109 TextDecodeOptions options;
110 return decode(0, options, exceptionState);