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-rw-r--r--storage/mozStorageStatementJSHelper.cpp258
1 files changed, 258 insertions, 0 deletions
diff --git a/storage/mozStorageStatementJSHelper.cpp b/storage/mozStorageStatementJSHelper.cpp
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+++ b/storage/mozStorageStatementJSHelper.cpp
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+/* -*- 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 "mozStorageStatement.h"
+#include "mozStorageService.h"
+
+#include "nsString.h"
+#include "nsServiceManagerUtils.h"
+
+#include "mozStorageStatementJSHelper.h"
+
+#include "mozStorageStatementRow.h"
+#include "mozStorageStatementParams.h"
+
+#include "jsapi.h"
+#include "js/PropertyAndElement.h" // JS_DefineFunction, JS_DefineProperty, JS_DefinePropertyById
+#include "js/Value.h"
+
+#include "xpc_make_class.h"
+
+namespace mozilla {
+namespace storage {
+
+////////////////////////////////////////////////////////////////////////////////
+//// Global Functions
+
+static bool stepFunc(JSContext* aCtx, uint32_t argc, JS::Value* _vp) {
+ JS::CallArgs args = CallArgsFromVp(argc, _vp);
+
+ nsCOMPtr<nsIXPConnect> xpc(nsIXPConnect::XPConnect());
+ nsCOMPtr<nsIXPConnectWrappedNative> wrapper;
+
+ if (!args.thisv().isObject()) {
+ ::JS_ReportErrorASCII(aCtx, "mozIStorageStatement::step() requires object");
+ return false;
+ }
+
+ JS::Rooted<JSObject*> obj(aCtx, &args.thisv().toObject());
+ nsresult rv =
+ xpc->GetWrappedNativeOfJSObject(aCtx, obj, getter_AddRefs(wrapper));
+ if (NS_FAILED(rv)) {
+ ::JS_ReportErrorASCII(
+ aCtx, "mozIStorageStatement::step() could not obtain native statement");
+ return false;
+ }
+
+#ifdef DEBUG
+ {
+ nsCOMPtr<mozIStorageStatement> isStatement(
+ do_QueryInterface(wrapper->Native()));
+ NS_ASSERTION(isStatement, "How is this not a statement?!");
+ }
+#endif
+
+ Statement* stmt = static_cast<Statement*>(
+ static_cast<mozIStorageStatement*>(wrapper->Native()));
+
+ bool hasMore = false;
+ rv = stmt->ExecuteStep(&hasMore);
+ if (NS_SUCCEEDED(rv) && !hasMore) {
+ args.rval().setBoolean(false);
+ (void)stmt->Reset();
+ return true;
+ }
+
+ if (NS_FAILED(rv)) {
+ ::JS_ReportErrorASCII(aCtx,
+ "mozIStorageStatement::step() returned an error");
+ return false;
+ }
+
+ args.rval().setBoolean(hasMore);
+ return true;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// StatementJSHelper
+
+nsresult StatementJSHelper::getRow(Statement* aStatement, JSContext* aCtx,
+ JSObject* aScopeObj, JS::Value* _row) {
+ MOZ_ASSERT(NS_IsMainThread());
+
+#ifdef DEBUG
+ int32_t state;
+ (void)aStatement->GetState(&state);
+ NS_ASSERTION(state == mozIStorageStatement::MOZ_STORAGE_STATEMENT_EXECUTING,
+ "Invalid state to get the row object - all calls will fail!");
+#endif
+
+ JS::Rooted<JSObject*> scope(aCtx, aScopeObj);
+
+ if (!aStatement->mStatementRowHolder) {
+ dom::GlobalObject global(aCtx, scope);
+ if (global.Failed()) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ nsCOMPtr<nsPIDOMWindowInner> window =
+ do_QueryInterface(global.GetAsSupports());
+
+ RefPtr<StatementRow> row(new StatementRow(window, aStatement));
+ NS_ENSURE_TRUE(row, NS_ERROR_OUT_OF_MEMORY);
+
+ RefPtr<StatementRowHolder> rowHolder = new StatementRowHolder(row);
+ NS_ENSURE_TRUE(rowHolder, NS_ERROR_OUT_OF_MEMORY);
+
+ aStatement->mStatementRowHolder =
+ new nsMainThreadPtrHolder<StatementRowHolder>(
+ "Statement::mStatementRowHolder", rowHolder);
+ }
+
+ RefPtr<StatementRow> row(aStatement->mStatementRowHolder->Get());
+ JSObject* obj = row->WrapObject(aCtx, nullptr);
+ if (!obj) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ _row->setObject(*obj);
+ return NS_OK;
+}
+
+nsresult StatementJSHelper::getParams(Statement* aStatement, JSContext* aCtx,
+ JSObject* aScopeObj, JS::Value* _params) {
+ MOZ_ASSERT(NS_IsMainThread());
+
+#ifdef DEBUG
+ int32_t state;
+ (void)aStatement->GetState(&state);
+ NS_ASSERTION(state == mozIStorageStatement::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<StatementParams> params(new StatementParams(window, aStatement));
+ NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);
+
+ RefPtr<StatementParamsHolder> paramsHolder =
+ new StatementParamsHolder(params);
+ NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY);
+
+ aStatement->mStatementParamsHolder =
+ new nsMainThreadPtrHolder<StatementParamsHolder>(
+ "Statement::mStatementParamsHolder", paramsHolder);
+ }
+
+ RefPtr<StatementParams> 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) StatementJSHelper::AddRef() {
+ return 2;
+}
+NS_IMETHODIMP_(MozExternalRefCountType) StatementJSHelper::Release() {
+ return 1;
+}
+NS_INTERFACE_MAP_BEGIN(StatementJSHelper)
+ NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsIXPCScriptable
+
+#define XPC_MAP_CLASSNAME StatementJSHelper
+#define XPC_MAP_QUOTED_CLASSNAME "StatementJSHelper"
+#define XPC_MAP_FLAGS \
+ (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
+#include "xpc_map_end.h"
+
+NS_IMETHODIMP
+StatementJSHelper::Resolve(nsIXPConnectWrappedNative* aWrapper, JSContext* aCtx,
+ JSObject* aScopeObj, jsid aId, bool* aResolvedp,
+ bool* _retval) {
+ if (!aId.isString()) return NS_OK;
+
+ JS::Rooted<JSObject*> scope(aCtx, aScopeObj);
+ JS::Rooted<jsid> id(aCtx, aId);
+
+#ifdef DEBUG
+ {
+ nsCOMPtr<mozIStorageStatement> isStatement(
+ do_QueryInterface(aWrapper->Native()));
+ NS_ASSERTION(isStatement, "How is this not a statement?!");
+ }
+#endif
+
+ Statement* stmt = static_cast<Statement*>(
+ static_cast<mozIStorageStatement*>(aWrapper->Native()));
+
+ JSLinearString* str = id.toLinearString();
+ if (::JS_LinearStringEqualsLiteral(str, "step")) {
+ *_retval = ::JS_DefineFunction(aCtx, scope, "step", stepFunc, 0,
+ JSPROP_RESOLVING) != nullptr;
+ *aResolvedp = true;
+ return NS_OK;
+ }
+
+ JS::Rooted<JS::Value> val(aCtx);
+
+ if (::JS_LinearStringEqualsLiteral(str, "row")) {
+ nsresult rv = getRow(stmt, aCtx, scope, val.address());
+ NS_ENSURE_SUCCESS(rv, rv);
+ *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
+ *aResolvedp = true;
+ return NS_OK;
+ }
+
+ if (::JS_LinearStringEqualsLiteral(str, "params")) {
+ nsresult rv = getParams(stmt, aCtx, scope, val.address());
+ NS_ENSURE_SUCCESS(rv, rv);
+ *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
+ *aResolvedp = true;
+ return NS_OK;
+ }
+
+ return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS0(StatementParamsHolder);
+
+StatementParamsHolder::~StatementParamsHolder() {
+ 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;
+}
+
+NS_IMPL_ISUPPORTS0(StatementRowHolder);
+
+StatementRowHolder::~StatementRowHolder() {
+ 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.
+ mRow->mStatement = nullptr;
+}
+
+} // namespace storage
+} // namespace mozilla
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