1 files changed, 142 insertions, 0 deletions
diff --git a/storage/mozStorageAsyncStatementJSHelper.cpp b/storage/mozStorageAsyncStatementJSHelper.cpp
new file mode 100644
index 0000000000..73366f6604
--- /dev/null
+++ b/storage/mozStorageAsyncStatementJSHelper.cpp
@@ -0,0 +1,142 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIXPConnect.h"
+#include "mozStorageAsyncStatement.h"
+#include "mozStorageService.h"
+
+#include "nsString.h"
+#include "nsServiceManagerUtils.h"
+
+#include "mozStorageAsyncStatementJSHelper.h"
+
+#include "mozStorageAsyncStatementParams.h"
+
+#include "jsapi.h"
+#include "js/PropertyAndElement.h"  // JS_DefineProperty, JS_DefinePropertyById
+
+#include "xpc_make_class.h"
+
+namespace mozilla {
+namespace storage {
+
+////////////////////////////////////////////////////////////////////////////////
+//// AsyncStatementJSHelper
+
+nsresult AsyncStatementJSHelper::getParams(AsyncStatement* aStatement,
+                                           JSContext* aCtx, JSObject* aScopeObj,
+                                           JS::Value* _params) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+#ifdef DEBUG
+  int32_t state;
+  (void)aStatement->GetState(&state);
+  NS_ASSERTION(state == mozIStorageAsyncStatement::MOZ_STORAGE_STATEMENT_READY,
+               "Invalid state to get the params object - all calls will fail!");
+#endif
+
+  JS::Rooted<JSObject*> scope(aCtx, aScopeObj);
+
+  if (!aStatement->mStatementParamsHolder) {
+    dom::GlobalObject global(aCtx, scope);
+    if (global.Failed()) {
+      return NS_ERROR_UNEXPECTED;
+    }
+
+    nsCOMPtr<nsPIDOMWindowInner> window =
+        do_QueryInterface(global.GetAsSupports());
+
+    RefPtr<AsyncStatementParams> params(
+        new AsyncStatementParams(window, aStatement));
+    NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);
+
+    RefPtr<AsyncStatementParamsHolder> paramsHolder =
+        new AsyncStatementParamsHolder(params);
+    NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY);
+
+    aStatement->mStatementParamsHolder =
+        new nsMainThreadPtrHolder<AsyncStatementParamsHolder>(
+            "Statement::mStatementParamsHolder", paramsHolder);
+  }
+
+  RefPtr<AsyncStatementParams> params(
+      aStatement->mStatementParamsHolder->Get());
+  JSObject* obj = params->WrapObject(aCtx, nullptr);
+  if (!obj) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  _params->setObject(*obj);
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::AddRef() {
+  return 2;
+}
+NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::Release() {
+  return 1;
+}
+NS_INTERFACE_MAP_BEGIN(AsyncStatementJSHelper)
+  NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsIXPCScriptable
+
+#define XPC_MAP_CLASSNAME AsyncStatementJSHelper
+#define XPC_MAP_QUOTED_CLASSNAME "AsyncStatementJSHelper"
+#define XPC_MAP_FLAGS \
+  (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
+#include "xpc_map_end.h"
+
+NS_IMETHODIMP
+AsyncStatementJSHelper::Resolve(nsIXPConnectWrappedNative* aWrapper,
+                                JSContext* aCtx, JSObject* aScopeObj, jsid aId,
+                                bool* resolvedp, bool* _retval) {
+  if (!aId.isString()) return NS_OK;
+
+  // Cast to async via mozI* since direct from nsISupports is ambiguous.
+  JS::Rooted<JSObject*> scope(aCtx, aScopeObj);
+  JS::Rooted<JS::PropertyKey> id(aCtx, aId);
+  mozIStorageAsyncStatement* iAsyncStmt =
+      static_cast<mozIStorageAsyncStatement*>(aWrapper->Native());
+  AsyncStatement* stmt = static_cast<AsyncStatement*>(iAsyncStmt);
+
+#ifdef DEBUG
+  {
+    nsISupports* supp = aWrapper->Native();
+    nsCOMPtr<mozIStorageAsyncStatement> isStatement(do_QueryInterface(supp));
+    NS_ASSERTION(isStatement, "How is this not an async statement?!");
+  }
+#endif
+
+  if (::JS_LinearStringEqualsLiteral(id.toLinearString(), "params")) {
+    JS::Rooted<JS::Value> val(aCtx);
+    nsresult rv = getParams(stmt, aCtx, scope, val.address());
+    NS_ENSURE_SUCCESS(rv, rv);
+    *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
+    *resolvedp = true;
+    return NS_OK;
+  }
+
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// AsyncStatementParamsHolder
+
+NS_IMPL_ISUPPORTS0(AsyncStatementParamsHolder);
+
+AsyncStatementParamsHolder::~AsyncStatementParamsHolder() {
+  MOZ_ASSERT(NS_IsMainThread());
+  // We are considered dead at this point, so any wrappers for row or params
+  // need to lose their reference to the statement.
+  mParams->mStatement = nullptr;
+}
+
+}  // namespace storage
+}  // namespace mozilla