This source file includes following definitions.
- create
- m_bomSeen
- encoding
- decode
#include "config.h"
#include "modules/encoding/TextDecoder.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "wtf/text/TextEncodingRegistry.h"
namespace WebCore {
PassRefPtrWillBeRawPtr<TextDecoder> TextDecoder::create(const String& label, const Dictionary& options, ExceptionState& exceptionState)
{
const String& encodingLabel = label.isNull() ? String("utf-8") : label;
WTF::TextEncoding encoding(encodingLabel);
if (!encoding.isValid()) {
exceptionState.throwTypeError("The encoding label provided ('" + encodingLabel + "') is invalid.");
return nullptr;
}
bool fatal = false;
options.get("fatal", fatal);
return adoptRefWillBeNoop(new TextDecoder(encoding.name(), fatal));
}
TextDecoder::TextDecoder(const String& encoding, bool fatal)
: m_encoding(encoding)
, m_codec(newTextCodec(m_encoding))
, m_fatal(fatal)
, m_bomSeen(false)
{
}
TextDecoder::~TextDecoder()
{
}
String TextDecoder::encoding() const
{
String name = String(m_encoding.name()).lower();
if (name == "iso-8859-1" || name == "us-ascii")
return "windows-1252";
return name;
}
String TextDecoder::decode(ArrayBufferView* input, const Dictionary& options, ExceptionState& exceptionState)
{
bool stream = false;
options.get("stream", stream);
const char* start = input ? static_cast<const char*>(input->baseAddress()) : 0;
size_t length = input ? input->byteLength() : 0;
WTF::FlushBehavior flush = stream ? WTF::DoNotFlush : WTF::DataEOF;
bool sawError = false;
String s = m_codec->decode(start, length, flush, m_fatal, sawError);
if (m_fatal && sawError) {
exceptionState.throwDOMException(EncodingError, "The encoded data was not valid.");
return String();
}
if (!m_bomSeen && !s.isEmpty()) {
m_bomSeen = true;
String name(m_encoding.name());
if ((name == "UTF-8" || name == "UTF-16LE" || name == "UTF-16BE") && s[0] == 0xFEFF)
s.remove(0);
}
if (flush)
m_bomSeen = false;
return s;
}
}