| // Copyright 2016 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/script/standalone_javascript_runner.h" |
| |
| #include <iostream> |
| #include <string> |
| |
| #include "base/file_util.h" |
| #include "cobalt/script/source_code.h" |
| |
| namespace cobalt { |
| namespace script { |
| |
| StandaloneJavascriptRunner::StandaloneJavascriptRunner() { |
| CommonInitialization(); |
| global_environment_->CreateGlobalObject(); |
| } |
| |
| void StandaloneJavascriptRunner::RunInteractive() { |
| while (!std::cin.eof() && std::cin.good()) { |
| // Interactive prompt. |
| std::cout << "> "; |
| |
| // Read user input from stdin. |
| std::string line; |
| std::getline(std::cin, line); |
| if (!line.empty()) { |
| ExecuteAndPrintResult(base::SourceLocation("[stdin]", 1, 1), line); |
| } |
| } |
| std::cout << std::endl; |
| } |
| |
| void StandaloneJavascriptRunner::ExecuteFile(const FilePath& path) { |
| std::string contents; |
| if (file_util::ReadFileToString(path, &contents)) { |
| ExecuteAndPrintResult(base::SourceLocation(path.value(), 1, 1), contents); |
| } else { |
| DLOG(INFO) << "Failed to read file: " << path.value(); |
| } |
| } |
| |
| void StandaloneJavascriptRunner::CommonInitialization() { |
| engine_ = JavaScriptEngine::CreateEngine(); |
| global_environment_ = engine_->CreateGlobalEnvironment(); |
| environment_settings_.reset(new EnvironmentSettings()); |
| } |
| |
| void StandaloneJavascriptRunner::ExecuteAndPrintResult( |
| const base::SourceLocation& source_location, const std::string& script) { |
| // Convert the utf8 string into a form that can be consumed by the |
| // JavaScript engine. |
| scoped_refptr<SourceCode> source = |
| SourceCode::CreateSourceCode(script, source_location); |
| |
| // Execute the script and get the results of execution. |
| std::string result; |
| bool success = global_environment_->EvaluateScript(source, &result); |
| // Echo the results to stdout. |
| if (!success) { |
| std::cout << "Exception: "; |
| } |
| std::cout << result << std::endl; |
| } |
| |
| } // namespace script |
| } // namespace cobalt |