Implement Encoding API

Source/modules/encoding/TextDecoder.cpp

Index: Source/modules/encoding/TextDecoder.cpp
diff --git a/Source/bindings/v8/ExceptionState.cpp b/Source/modules/encoding/TextDecoder.cpp
similarity index 53%
copy from Source/bindings/v8/ExceptionState.cpp
copy to Source/modules/encoding/TextDecoder.cpp
index 26ea567f9cab9fc1a6f509cbe621d65e70544171..69d37d050a4bf4165db0af3150655c7f24844327 100644
--- a/Source/bindings/v8/ExceptionState.cpp
+++ b/Source/modules/encoding/TextDecoder.cpp
@@ -29,53 +29,70 @@
  */
 
 #include "config.h"
-#include "bindings/v8/ExceptionState.h"
 
-#include "bindings/v8/V8ThrowException.h"
+#include "modules/encoding/TextDecoder.h"
+
+#include "bindings/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
+#include "wtf/text/TextEncodingRegistry.h"
 
 namespace WebCore {
 
-void ExceptionState::clearException()
-{
-    m_code = 0;
-    m_exception.clear();
-}
-
-void ExceptionState::throwDOMException(const ExceptionCode& ec, const String& message)
+PassRefPtr<TextDecoder> TextDecoder::create(const String& label, const Dictionary& options, ExceptionState& es)
 {
-    ASSERT(ec);
-    m_code = ec;
-    setException(V8ThrowException::createDOMException(ec, message, m_isolate));
-}
+    const String& encodingLabel = label.isNull() ? String("utf-8") : label;
 
-void ExceptionState::setException(v8::Handle<v8::Value> exception)
-{
-    if (exception.IsEmpty()) {
-        clearException();
-        return;
+    WTF::TextEncoding encoding(encodingLabel);
+    if (!encoding.isValid()) {
+        es.throwTypeError();
+        return 0;
     }
 
-    m_exception.set(m_isolate, exception);
+    bool fatal = false;
+    options.get("fatal", fatal);
+
+    return adoptRef(new TextDecoder(encoding.name(), fatal));
 }
 
-void ExceptionState::throwTypeError(const String& message)
+
+TextDecoder::TextDecoder(const String& encoding, bool fatal)
+    : m_encoding(encoding)
+    , m_codec(newTextCodec(m_encoding))
+    , m_fatal(fatal)
 {
-    m_code = TypeError;
-    setException(V8ThrowException::createTypeError(message, m_isolate));
 }
 
-NonThrowExceptionState::NonThrowExceptionState()
-    : ExceptionState(0) { }
+TextDecoder::~TextDecoder()
+{
+}
 
-void NonThrowExceptionState::throwDOMException(const ExceptionCode& ec, const String&)
+String TextDecoder::encoding() const
 {
-    m_code = ec;
+    return String(m_encoding.name()).lower();
 }
 
-void NonThrowExceptionState::throwTypeError(const String&)
+String TextDecoder::decode(ArrayBufferView* input, const Dictionary& options, ExceptionState& es)
 {
-    m_code = TypeError;
+    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;
+
+    bool flush = !stream;
+
+    // FIXME: Not all TextCodec implementations handle |flush| - notably TextCodecUTF16
+    // ignores it and never flushes!
+
+    bool sawError = false;
+    String s = m_codec->decode(start, length, flush, m_fatal, sawError);
+
+    if (m_fatal && sawError) {
+        es.throwDOMException(EncodingError, "The encoded data was not valid.");
+        return String();
+    }
+
+    return s;
 }
 
 } // namespace WebCore