зеркало из https://github.com/mozilla/gecko-dev.git
153 строки
4.3 KiB
C++
153 строки
4.3 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 "nsMemory.h"
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#include "nsString.h"
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#include "mozilla/ErrorResult.h"
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#include "mozilla/dom/MozStorageStatementRowBinding.h"
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#include "mozStorageStatementRow.h"
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#include "mozStorageStatement.h"
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#include "jsapi.h"
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#include "js/Array.h" // JS::NewArrayObject
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#include "js/Value.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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//// StatementRow
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(StatementRow, mWindow)
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NS_INTERFACE_TABLE_HEAD(StatementRow)
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NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
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NS_INTERFACE_TABLE(StatementRow, nsISupports)
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NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(StatementRow)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(StatementRow)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(StatementRow)
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StatementRow::StatementRow(nsPIDOMWindowInner* aWindow, Statement* aStatement)
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: mWindow(aWindow), mStatement(aStatement) {}
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JSObject* StatementRow::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return dom::MozStorageStatementRow_Binding::Wrap(aCx, this, aGivenProto);
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}
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void StatementRow::NamedGetter(JSContext* aCx, const nsAString& aName,
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bool& aFound,
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JS::MutableHandle<JS::Value> aResult,
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mozilla::ErrorResult& aRv) {
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if (!mStatement) {
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aRv.Throw(NS_ERROR_NOT_INITIALIZED);
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return;
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}
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nsCString name = NS_ConvertUTF16toUTF8(aName);
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uint32_t idx;
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{
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nsresult rv = mStatement->GetColumnIndex(name, &idx);
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if (NS_FAILED(rv)) {
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// It's highly likely that the name doesn't exist, so let the JS engine
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// check the prototype chain and throw if that doesn't have the property
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// either.
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aFound = false;
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return;
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}
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}
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int32_t type;
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aRv = mStatement->GetTypeOfIndex(idx, &type);
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if (aRv.Failed()) {
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return;
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}
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switch (type) {
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case mozIStorageValueArray::VALUE_TYPE_INTEGER:
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case mozIStorageValueArray::VALUE_TYPE_FLOAT: {
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double dval;
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aRv = mStatement->GetDouble(idx, &dval);
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if (aRv.Failed()) {
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return;
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}
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aResult.set(::JS_NumberValue(dval));
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break;
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}
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case mozIStorageValueArray::VALUE_TYPE_TEXT: {
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uint32_t bytes;
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const char16_t* sval = reinterpret_cast<const char16_t*>(
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static_cast<mozIStorageStatement*>(mStatement)
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->AsSharedWString(idx, &bytes));
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JSString* str =
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::JS_NewUCStringCopyN(aCx, sval, bytes / sizeof(char16_t));
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if (!str) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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aResult.setString(str);
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break;
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}
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case mozIStorageValueArray::VALUE_TYPE_BLOB: {
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uint32_t length;
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const uint8_t* blob = static_cast<mozIStorageStatement*>(mStatement)
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->AsSharedBlob(idx, &length);
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JS::Rooted<JSObject*> obj(aCx, JS::NewArrayObject(aCx, length));
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if (!obj) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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aResult.setObject(*obj);
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// Copy the blob over to the JS array.
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for (uint32_t i = 0; i < length; i++) {
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if (!::JS_DefineElement(aCx, obj, i, blob[i], JSPROP_ENUMERATE)) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return;
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}
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}
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break;
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}
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case mozIStorageValueArray::VALUE_TYPE_NULL:
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aResult.setNull();
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break;
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default:
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NS_ERROR("unknown column type returned, what's going on?");
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break;
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}
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aFound = true;
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}
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void StatementRow::GetSupportedNames(nsTArray<nsString>& aNames) {
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if (!mStatement) {
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return;
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}
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uint32_t columnCount;
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nsresult rv = mStatement->GetColumnCount(&columnCount);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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for (uint32_t i = 0; i < columnCount; i++) {
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nsAutoCString name;
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nsresult rv = mStatement->GetColumnName(i, name);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return;
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}
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aNames.AppendElement(NS_ConvertUTF8toUTF16(name));
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}
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}
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} // namespace storage
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} // namespace mozilla
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