зеркало из https://github.com/mozilla/gecko-dev.git
155 строки
5.0 KiB
C++
155 строки
5.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIXPConnect.h"
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#include "mozStorageAsyncStatement.h"
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#include "mozStorageService.h"
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#include "nsMemory.h"
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#include "nsString.h"
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#include "nsServiceManagerUtils.h"
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#include "mozStorageAsyncStatementJSHelper.h"
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#include "mozStorageAsyncStatementParams.h"
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#include "jsapi.h"
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#include "xpc_make_class.h"
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namespace mozilla {
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namespace storage {
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////////////////////////////////////////////////////////////////////////////////
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//// AsyncStatementJSHelper
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nsresult
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AsyncStatementJSHelper::getParams(AsyncStatement *aStatement,
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JSContext *aCtx,
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JSObject *aScopeObj,
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JS::Value *_params)
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsresult rv;
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#ifdef DEBUG
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int32_t state;
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(void)aStatement->GetState(&state);
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NS_ASSERTION(state == mozIStorageAsyncStatement::MOZ_STORAGE_STATEMENT_READY,
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"Invalid state to get the params object - all calls will fail!");
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#endif
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if (!aStatement->mStatementParamsHolder) {
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nsCOMPtr<mozIStorageStatementParams> params =
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new AsyncStatementParams(aStatement);
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NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);
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JS::RootedObject scope(aCtx, aScopeObj);
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nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
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nsCOMPtr<nsIXPConnect> xpc(Service::getXPConnect());
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rv = xpc->WrapNativeHolder(
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aCtx,
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::JS_GetGlobalForObject(aCtx, scope),
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params,
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NS_GET_IID(mozIStorageStatementParams),
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getter_AddRefs(holder)
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);
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NS_ENSURE_SUCCESS(rv, rv);
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RefPtr<AsyncStatementParamsHolder> paramsHolder =
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new AsyncStatementParamsHolder(holder);
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aStatement->mStatementParamsHolder =
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new nsMainThreadPtrHolder<nsIXPConnectJSObjectHolder>(
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"AsyncStatement::mStatementParamsHolder", paramsHolder);
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}
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JS::Rooted<JSObject*> obj(aCtx);
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obj = aStatement->mStatementParamsHolder->GetJSObject();
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NS_ENSURE_STATE(obj);
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_params->setObject(*obj);
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return NS_OK;
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}
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NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::AddRef() { return 2; }
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NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::Release() { return 1; }
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NS_INTERFACE_MAP_BEGIN(AsyncStatementJSHelper)
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NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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////////////////////////////////////////////////////////////////////////////////
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//// nsIXPCScriptable
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#define XPC_MAP_CLASSNAME AsyncStatementJSHelper
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#define XPC_MAP_QUOTED_CLASSNAME "AsyncStatementJSHelper"
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#define XPC_MAP_FLAGS (XPC_SCRIPTABLE_WANT_GETPROPERTY | \
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XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
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#include "xpc_map_end.h"
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NS_IMETHODIMP
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AsyncStatementJSHelper::GetProperty(nsIXPConnectWrappedNative *aWrapper,
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JSContext *aCtx,
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JSObject *aScopeObj,
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jsid aId,
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JS::Value *_result,
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bool *_retval)
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{
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if (!JSID_IS_STRING(aId))
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return NS_OK;
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// Cast to async via mozI* since direct from nsISupports is ambiguous.
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JS::RootedObject scope(aCtx, aScopeObj);
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JS::RootedId id(aCtx, aId);
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mozIStorageAsyncStatement *iAsyncStmt =
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static_cast<mozIStorageAsyncStatement *>(aWrapper->Native());
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AsyncStatement *stmt = static_cast<AsyncStatement *>(iAsyncStmt);
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#ifdef DEBUG
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{
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nsISupports *supp = aWrapper->Native();
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nsCOMPtr<mozIStorageAsyncStatement> isStatement(do_QueryInterface(supp));
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NS_ASSERTION(isStatement, "How is this not an async statement?!");
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}
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#endif
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if (::JS_FlatStringEqualsAscii(JSID_TO_FLAT_STRING(id), "params"))
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return getParams(stmt, aCtx, scope, _result);
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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//// AsyncStatementParamsHolder
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NS_IMPL_ISUPPORTS(AsyncStatementParamsHolder, nsIXPConnectJSObjectHolder);
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JSObject*
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AsyncStatementParamsHolder::GetJSObject()
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{
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return mHolder->GetJSObject();
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}
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AsyncStatementParamsHolder::AsyncStatementParamsHolder(nsIXPConnectJSObjectHolder* aHolder)
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: mHolder(aHolder)
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{
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MOZ_ASSERT(NS_IsMainThread());
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MOZ_ASSERT(mHolder);
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}
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AsyncStatementParamsHolder::~AsyncStatementParamsHolder()
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{
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MOZ_ASSERT(NS_IsMainThread());
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// We are considered dead at this point, so any wrappers for row or params
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// need to lose their reference to the statement.
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nsCOMPtr<nsIXPConnectWrappedNative> wrapper = do_QueryInterface(mHolder);
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nsCOMPtr<mozIStorageStatementParams> iObj = do_QueryWrappedNative(wrapper);
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AsyncStatementParams *obj = static_cast<AsyncStatementParams *>(iObj.get());
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obj->mStatement = nullptr;
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}
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} // namespace storage
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} // namespace mozilla
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