| 269 | } |
| 270 | |
| 271 | bool PyBytesProxyHandler::getOwnPropertyDescriptor( |
| 272 | JSContext *cx, JS::HandleObject proxy, JS::HandleId id, |
| 273 | JS::MutableHandle<mozilla::Maybe<JS::PropertyDescriptor>> desc |
| 274 | ) const { |
| 275 | // see if we're calling a function |
| 276 | if (id.isString()) { |
| 277 | for (size_t index = 0;; index++) { |
| 278 | bool isThatFunction; |
| 279 | const char *methodName = array_methods[index].name; |
| 280 | if (methodName == NULL) { |
| 281 | break; |
| 282 | } |
| 283 | else if (JS_StringEqualsAscii(cx, id.toString(), methodName, &isThatFunction) && isThatFunction) { |
| 284 | JSFunction *newFunction = JS_NewFunction(cx, array_methods[index].call, array_methods[index].nargs, 0, NULL); |
| 285 | if (!newFunction) return false; |
| 286 | JS::RootedObject funObj(cx, JS_GetFunctionObject(newFunction)); |
| 287 | desc.set(mozilla::Some( |
| 288 | JS::PropertyDescriptor::Data( |
| 289 | JS::ObjectValue(*funObj), |
| 290 | {JS::PropertyAttribute::Enumerable} |
| 291 | ) |
| 292 | )); |
| 293 | return true; |
| 294 | } |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | if (id.isString()) { |
| 299 | bool isProperty; |
| 300 | |
| 301 | JSString *idString = id.toString(); |
| 302 | |
| 303 | // "length" and "byteLength" properties have the same value |
| 304 | if ((JS_StringEqualsLiteral(cx, idString, "length", &isProperty) && isProperty) || (JS_StringEqualsLiteral(cx, id.toString(), "byteLength", &isProperty) && isProperty)) { |
| 305 | JS::PersistentRootedObject *arrayBuffer = JS::GetMaybePtrFromReservedSlot<JS::PersistentRootedObject>(proxy, OtherSlot); |
| 306 | |
| 307 | JS::RootedObject rootedArrayBuffer(cx, arrayBuffer->get()); |
| 308 | |
| 309 | auto byteLength = JS::GetArrayBufferByteLength(rootedArrayBuffer); |
| 310 | |
| 311 | desc.set(mozilla::Some( |
| 312 | JS::PropertyDescriptor::Data( |
| 313 | JS::Int32Value(byteLength) |
| 314 | ) |
| 315 | )); |
| 316 | return true; |
| 317 | } |
| 318 | |
| 319 | // "buffer" property |
| 320 | if (JS_StringEqualsLiteral(cx, idString, "buffer", &isProperty) && isProperty) { |
| 321 | JS::PersistentRootedObject *arrayBuffer = JS::GetMaybePtrFromReservedSlot<JS::PersistentRootedObject>(proxy, OtherSlot); |
| 322 | |
| 323 | desc.set(mozilla::Some( |
| 324 | JS::PropertyDescriptor::Data( |
| 325 | JS::ObjectValue(*(arrayBuffer->get())) |
| 326 | ) |
| 327 | )); |
| 328 | return true; |