Source/modules/encoding/TextEncoder.cpp

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#include "config.h"

#include "modules/encoding/TextEncoder.h"

#include "bindings/v8/Dictionary.h"
#include "bindings/v8/ExceptionState.h"
#include "wtf/text/CString.h"
#include "wtf/text/TextEncodingRegistry.h"

namespace WebCore {

PassRefPtr<TextEncoder> TextEncoder::create(const String& utfLabel, ExceptionState& es)
{
    const String& encodingLabel = utfLabel.isNull() ? String("utf-8") : utfLabel;

    // FIXME: Types don't match Encoding spec, e.g. "ascii" => "US-ASCII" not "UTF-8".

    WTF::TextEncoding encoding(encodingLabel);
    if (!encoding.isValid()) {
        es.throwTypeError();
        return 0;
    }

    String name(encoding.name());
    if (name != "UTF-8" && name != "UTF-16LE" && name != "UTF-16BE") {
        es.throwTypeError();
        return 0;
    }

    return adoptRef(new TextEncoder(encoding.name()));
}

TextEncoder::TextEncoder(const String& encoding)
    : m_encoding(encoding)
    , m_codec(newTextCodec(m_encoding))
{
}

TextEncoder::~TextEncoder()
{
}

String TextEncoder::encoding() const
{
    return String(m_encoding.name()).lower();
}

PassRefPtr<Uint8Array> TextEncoder::encode(const String& input, const Dictionary& options)
{
    bool stream = false;
    options.get("stream", stream);

    // FIXME: Not flushing is not supported by TextCodec for encode; add it or
    // handle split surrogates here.

    CString result;
    if (input.is8Bit())
        result = m_codec->encode(input.characters8(), input.length(), WTF::QuestionMarksForUnencodables);
    else
        result = m_codec->encode(input.characters16(), input.length(), WTF::QuestionMarksForUnencodables);

    const char* buffer = result.data();
    const unsigned char* unsignedBuffer = reinterpret_cast<const unsigned char*>(buffer);

    return Uint8Array::create(unsignedBuffer, result.length());
}

} // namespace WebCore