AtObj AtlasObject::LoadFromJSON(JSContext* cx, const std::string& json)
{
// Convert UTF8 to UTF16
wxString jsonW(json.c_str(), wxConvUTF8);
size_t json16len;
wxCharBuffer json16 = wxMBConvUTF16().cWC2MB(jsonW.c_str(), jsonW.Length(), &json16len);
jsval vp = JSVAL_NULL;
JSONParser* parser = JS_BeginJSONParse(cx, &vp);
if (!parser)
{
wxLogError(_T("ParseJSON failed to begin"));
return AtObj();
}
if (!JS_ConsumeJSONText(cx, parser, reinterpret_cast<const jschar*>(json16.data()), (uint32)(json16len/2)))
{
wxLogError(_T("ParseJSON failed to consume"));
return AtObj();
}
if (!JS_FinishJSONParse(cx, parser, JSVAL_NULL))
{
wxLogError(_T("ParseJSON failed to finish"));
return AtObj();
}
AtObj obj;
obj.p = ConvertNode(cx, vp);
return obj;
}
// Convert from a jsval to an AtNode
static AtSmartPtr<AtNode> ConvertNode(JSContext* cx, jsval node)
{
AtSmartPtr<AtNode> obj (new AtNode());
// Non-objects get converted into strings
if (!JSVAL_IS_OBJECT(node))
{
JSString* str = JS_ValueToString(cx, node);
if (!str)
return obj; // error
size_t valueLen;
const jschar* valueChars = JS_GetStringCharsAndLength(cx, str, &valueLen);
if (!valueChars)
return obj; // error
wxString valueWx(reinterpret_cast<const char*>(valueChars), wxMBConvUTF16(), valueLen*2);
obj->value = valueWx.c_str();
// Annotate numbers/booleans specially, to allow round-tripping
if (JSVAL_IS_NUMBER(node))
{
obj->children.insert(AtNode::child_pairtype(
"@number", AtSmartPtr<AtNode>(new AtNode())
));
}
else if (JSVAL_IS_BOOLEAN(node))
{
obj->children.insert(AtNode::child_pairtype(
"@boolean", AtSmartPtr<AtNode>(new AtNode())
));
}
return obj;
}
JSObject* it = JS_NewPropertyIterator(cx, JSVAL_TO_OBJECT(node));
if (!it)
return obj; // error
while (true)
{
jsid idp;
jsval val;
if (! JS_NextProperty(cx, it, &idp) || ! JS_IdToValue(cx, idp, &val))
return obj; // error
if (val == JSVAL_VOID)
break; // end of iteration
if (! JSVAL_IS_STRING(val))
continue; // ignore integer properties
JSString* name = JSVAL_TO_STRING(val);
size_t len;
const jschar* chars = JS_GetStringCharsAndLength(cx, name, &len);
wxString nameWx(reinterpret_cast<const char*>(chars), wxMBConvUTF16(), len*2);
std::string nameStr(nameWx.ToUTF8().data());
jsval vp;
if (!JS_GetPropertyById(cx, JSVAL_TO_OBJECT(node), idp, &vp))
return obj; // error
// Unwrap arrays into a special format like <$name><item>$i0</item><item>...
// (This assumes arrays aren't nested)
if (JSVAL_IS_OBJECT(vp) && JS_IsArrayObject(cx, JSVAL_TO_OBJECT(vp)))
{
AtSmartPtr<AtNode> child(new AtNode());
child->children.insert(AtNode::child_pairtype(
"@array", AtSmartPtr<AtNode>(new AtNode())
));
jsuint arrayLength;
if (!JS_GetArrayLength(cx, JSVAL_TO_OBJECT(vp), &arrayLength))
return obj; // error
for (jsuint i = 0; i < arrayLength; ++i)
{
jsval val;
if (!JS_GetElement(cx, JSVAL_TO_OBJECT(vp), i, &val))
return obj; // error
child->children.insert(AtNode::child_pairtype(
"item", ConvertNode(cx, val)
));
}
obj->children.insert(AtNode::child_pairtype(
nameStr, child
));
}
else
{
obj->children.insert(AtNode::child_pairtype(
nameStr, ConvertNode(cx, vp)
));
}
}
return obj;
}
MyTagLib::String OOPCharsetConv::utf16ToWide(const char *utf16, size_t numBytes) {
wxWCharBuffer buf(wxMBConvUTF16().cMB2WC(utf16, numBytes, NULL));
return buf ? (const wchar_t *) buf : MyTagLib::EmptyString;
}
char *OOPCharsetConv::wideToUtf16(const MyTagLib::String &wide) {
return wxMBConvUTF16().cWC2MB(wide.c_str()).release();
}
void RoundTripUTF16() { DoRoundTripTest(wxMBConvUTF16()); }
