зеркало из https://github.com/mozilla/gecko-dev.git
258 строки
7.6 KiB
C++
258 строки
7.6 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 "mozStorageStatement.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 "mozStorageStatementJSHelper.h"
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#include "mozStorageStatementRow.h"
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#include "mozStorageStatementParams.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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//// Global Functions
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static bool stepFunc(JSContext *aCtx, uint32_t argc, JS::Value *_vp) {
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JS::CallArgs args = CallArgsFromVp(argc, _vp);
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nsCOMPtr<nsIXPConnect> xpc(nsIXPConnect::XPConnect());
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nsCOMPtr<nsIXPConnectWrappedNative> wrapper;
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if (!args.thisv().isObject()) {
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::JS_ReportErrorASCII(aCtx, "mozIStorageStatement::step() requires object");
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return false;
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}
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JSObject *obj = &args.thisv().toObject();
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nsresult rv =
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xpc->GetWrappedNativeOfJSObject(aCtx, obj, getter_AddRefs(wrapper));
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if (NS_FAILED(rv)) {
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::JS_ReportErrorASCII(
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aCtx, "mozIStorageStatement::step() could not obtain native statement");
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return false;
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}
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#ifdef DEBUG
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{
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nsCOMPtr<mozIStorageStatement> isStatement(
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do_QueryInterface(wrapper->Native()));
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NS_ASSERTION(isStatement, "How is this not a statement?!");
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}
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#endif
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Statement *stmt = static_cast<Statement *>(
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static_cast<mozIStorageStatement *>(wrapper->Native()));
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bool hasMore = false;
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rv = stmt->ExecuteStep(&hasMore);
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if (NS_SUCCEEDED(rv) && !hasMore) {
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args.rval().setBoolean(false);
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(void)stmt->Reset();
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return true;
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}
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if (NS_FAILED(rv)) {
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::JS_ReportErrorASCII(aCtx,
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"mozIStorageStatement::step() returned an error");
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return false;
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}
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args.rval().setBoolean(hasMore);
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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//// StatementJSHelper
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nsresult StatementJSHelper::getRow(Statement *aStatement, JSContext *aCtx,
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JSObject *aScopeObj, JS::Value *_row) {
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MOZ_ASSERT(NS_IsMainThread());
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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 == mozIStorageStatement::MOZ_STORAGE_STATEMENT_EXECUTING,
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"Invalid state to get the row object - all calls will fail!");
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#endif
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JS::RootedObject scope(aCtx, aScopeObj);
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if (!aStatement->mStatementRowHolder) {
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dom::GlobalObject global(aCtx, scope);
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if (global.Failed()) {
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return NS_ERROR_UNEXPECTED;
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}
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nsCOMPtr<nsPIDOMWindowInner> window =
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do_QueryInterface(global.GetAsSupports());
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RefPtr<StatementRow> row(new StatementRow(window, aStatement));
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NS_ENSURE_TRUE(row, NS_ERROR_OUT_OF_MEMORY);
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RefPtr<StatementRowHolder> rowHolder = new StatementRowHolder(row);
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NS_ENSURE_TRUE(rowHolder, NS_ERROR_OUT_OF_MEMORY);
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aStatement->mStatementRowHolder =
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new nsMainThreadPtrHolder<StatementRowHolder>(
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"Statement::mStatementRowHolder", rowHolder);
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}
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RefPtr<StatementRow> row(aStatement->mStatementRowHolder->Get());
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JSObject *obj = row->WrapObject(aCtx, nullptr);
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if (!obj) {
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return NS_ERROR_UNEXPECTED;
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}
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_row->setObject(*obj);
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return NS_OK;
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}
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nsresult StatementJSHelper::getParams(Statement *aStatement, JSContext *aCtx,
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JSObject *aScopeObj, JS::Value *_params) {
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MOZ_ASSERT(NS_IsMainThread());
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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 == mozIStorageStatement::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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JS::RootedObject scope(aCtx, aScopeObj);
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if (!aStatement->mStatementParamsHolder) {
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dom::GlobalObject global(aCtx, scope);
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if (global.Failed()) {
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return NS_ERROR_UNEXPECTED;
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}
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nsCOMPtr<nsPIDOMWindowInner> window =
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do_QueryInterface(global.GetAsSupports());
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RefPtr<StatementParams> params(new StatementParams(window, aStatement));
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NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);
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RefPtr<StatementParamsHolder> paramsHolder =
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new StatementParamsHolder(params);
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NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY);
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aStatement->mStatementParamsHolder =
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new nsMainThreadPtrHolder<StatementParamsHolder>(
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"Statement::mStatementParamsHolder", paramsHolder);
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}
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RefPtr<StatementParams> params(aStatement->mStatementParamsHolder->Get());
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JSObject *obj = params->WrapObject(aCtx, nullptr);
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if (!obj) {
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return NS_ERROR_UNEXPECTED;
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}
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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) StatementJSHelper::AddRef() {
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return 2;
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}
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NS_IMETHODIMP_(MozExternalRefCountType) StatementJSHelper::Release() {
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return 1;
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}
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NS_INTERFACE_MAP_BEGIN(StatementJSHelper)
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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 StatementJSHelper
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#define XPC_MAP_QUOTED_CLASSNAME "StatementJSHelper"
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#define XPC_MAP_FLAGS \
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(XPC_SCRIPTABLE_WANT_RESOLVE | 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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StatementJSHelper::Resolve(nsIXPConnectWrappedNative *aWrapper, JSContext *aCtx,
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JSObject *aScopeObj, jsid aId, bool *aResolvedp,
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bool *_retval) {
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if (!JSID_IS_STRING(aId)) return NS_OK;
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JS::Rooted<JSObject *> scope(aCtx, aScopeObj);
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JS::Rooted<jsid> id(aCtx, aId);
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#ifdef DEBUG
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{
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nsCOMPtr<mozIStorageStatement> isStatement(
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do_QueryInterface(aWrapper->Native()));
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NS_ASSERTION(isStatement, "How is this not a statement?!");
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}
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#endif
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Statement *stmt = static_cast<Statement *>(
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static_cast<mozIStorageStatement *>(aWrapper->Native()));
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JSFlatString *str = JSID_TO_FLAT_STRING(id);
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if (::JS_FlatStringEqualsAscii(str, "step")) {
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*_retval = ::JS_DefineFunction(aCtx, scope, "step", stepFunc, 0,
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JSPROP_RESOLVING) != nullptr;
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*aResolvedp = true;
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return NS_OK;
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}
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JS::RootedValue val(aCtx);
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if (::JS_FlatStringEqualsAscii(str, "row")) {
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nsresult rv = getRow(stmt, aCtx, scope, val.address());
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NS_ENSURE_SUCCESS(rv, rv);
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*_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
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*aResolvedp = true;
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return NS_OK;
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}
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if (::JS_FlatStringEqualsAscii(str, "params")) {
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nsresult rv = getParams(stmt, aCtx, scope, val.address());
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NS_ENSURE_SUCCESS(rv, rv);
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*_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
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*aResolvedp = true;
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return NS_OK;
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}
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return NS_OK;
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}
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NS_IMPL_ISUPPORTS0(StatementParamsHolder);
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StatementParamsHolder::~StatementParamsHolder() {
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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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mParams->mStatement = nullptr;
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}
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NS_IMPL_ISUPPORTS0(StatementRowHolder);
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StatementRowHolder::~StatementRowHolder() {
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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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mRow->mStatement = nullptr;
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}
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} // namespace storage
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} // namespace mozilla
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