mozStorageAsyncStatementJSHelper.cpp (4681B)
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- 2 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ : 3 * This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #include "nsIXPConnect.h" 8 #include "mozStorageAsyncStatement.h" 9 #include "mozStorageService.h" 10 11 #include "nsString.h" 12 #include "nsServiceManagerUtils.h" 13 14 #include "mozStorageAsyncStatementJSHelper.h" 15 16 #include "mozStorageAsyncStatementParams.h" 17 18 #include "jsapi.h" 19 #include "js/PropertyAndElement.h" // JS_DefineProperty, JS_DefinePropertyById 20 21 #include "xpc_make_class.h" 22 23 namespace mozilla { 24 namespace storage { 25 26 //////////////////////////////////////////////////////////////////////////////// 27 //// AsyncStatementJSHelper 28 29 nsresult AsyncStatementJSHelper::getParams(AsyncStatement* aStatement, 30 JSContext* aCtx, JSObject* aScopeObj, 31 JS::Value* _params) { 32 MOZ_ASSERT(NS_IsMainThread()); 33 34 #ifdef DEBUG 35 int32_t state; 36 (void)aStatement->GetState(&state); 37 NS_ASSERTION(state == mozIStorageAsyncStatement::MOZ_STORAGE_STATEMENT_READY, 38 "Invalid state to get the params object - all calls will fail!"); 39 #endif 40 41 JS::Rooted<JSObject*> scope(aCtx, aScopeObj); 42 43 if (!aStatement->mStatementParamsHolder) { 44 dom::GlobalObject global(aCtx, scope); 45 if (global.Failed()) { 46 return NS_ERROR_UNEXPECTED; 47 } 48 49 nsCOMPtr<nsPIDOMWindowInner> window = 50 do_QueryInterface(global.GetAsSupports()); 51 52 RefPtr<AsyncStatementParams> params( 53 new AsyncStatementParams(window, aStatement)); 54 NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY); 55 56 RefPtr<AsyncStatementParamsHolder> paramsHolder = 57 new AsyncStatementParamsHolder(params); 58 NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY); 59 60 aStatement->mStatementParamsHolder = 61 new nsMainThreadPtrHolder<AsyncStatementParamsHolder>( 62 "Statement::mStatementParamsHolder", paramsHolder); 63 } 64 65 RefPtr<AsyncStatementParams> params( 66 aStatement->mStatementParamsHolder->Get()); 67 JSObject* obj = params->WrapObject(aCtx, nullptr); 68 if (!obj) { 69 return NS_ERROR_UNEXPECTED; 70 } 71 72 _params->setObject(*obj); 73 return NS_OK; 74 } 75 76 NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::AddRef() { 77 return 2; 78 } 79 NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::Release() { 80 return 1; 81 } 82 NS_INTERFACE_MAP_BEGIN(AsyncStatementJSHelper) 83 NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable) 84 NS_INTERFACE_MAP_ENTRY(nsISupports) 85 NS_INTERFACE_MAP_END 86 87 //////////////////////////////////////////////////////////////////////////////// 88 //// nsIXPCScriptable 89 90 #define XPC_MAP_CLASSNAME AsyncStatementJSHelper 91 #define XPC_MAP_QUOTED_CLASSNAME "AsyncStatementJSHelper" 92 #define XPC_MAP_FLAGS \ 93 (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) 94 #include "xpc_map_end.h" 95 96 NS_IMETHODIMP 97 AsyncStatementJSHelper::Resolve(nsIXPConnectWrappedNative* aWrapper, 98 JSContext* aCtx, JSObject* aScopeObj, jsid aId, 99 bool* resolvedp, bool* _retval) { 100 if (!aId.isString()) return NS_OK; 101 102 // Cast to async via mozI* since direct from nsISupports is ambiguous. 103 JS::Rooted<JSObject*> scope(aCtx, aScopeObj); 104 JS::Rooted<JS::PropertyKey> id(aCtx, aId); 105 mozIStorageAsyncStatement* iAsyncStmt = 106 static_cast<mozIStorageAsyncStatement*>(aWrapper->Native()); 107 AsyncStatement* stmt = static_cast<AsyncStatement*>(iAsyncStmt); 108 109 #ifdef DEBUG 110 { 111 nsISupports* supp = aWrapper->Native(); 112 nsCOMPtr<mozIStorageAsyncStatement> isStatement(do_QueryInterface(supp)); 113 NS_ASSERTION(isStatement, "How is this not an async statement?!"); 114 } 115 #endif 116 117 if (::JS_LinearStringEqualsLiteral(id.toLinearString(), "params")) { 118 JS::Rooted<JS::Value> val(aCtx); 119 nsresult rv = getParams(stmt, aCtx, scope, val.address()); 120 NS_ENSURE_SUCCESS(rv, rv); 121 *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING); 122 *resolvedp = true; 123 return NS_OK; 124 } 125 126 return NS_OK; 127 } 128 129 //////////////////////////////////////////////////////////////////////////////// 130 //// AsyncStatementParamsHolder 131 132 NS_IMPL_ISUPPORTS0(AsyncStatementParamsHolder); 133 134 AsyncStatementParamsHolder::~AsyncStatementParamsHolder() { 135 MOZ_ASSERT(NS_IsMainThread()); 136 // We are considered dead at this point, so any wrappers for row or params 137 // need to lose their reference to the statement. 138 mParams->mStatement = nullptr; 139 } 140 141 } // namespace storage 142 } // namespace mozilla