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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gin/shell_runner.h"
#include <memory>
#include "base/notreached.h"
#include "gin/converter.h"
#include "gin/per_context_data.h"
#include "gin/public/context_holder.h"
#include "gin/try_catch.h"
#include "v8/include/v8-script.h"
namespace gin {
ShellRunnerDelegate::ShellRunnerDelegate() = default;
ShellRunnerDelegate::~ShellRunnerDelegate() = default;
v8::Local<v8::ObjectTemplate> ShellRunnerDelegate::GetGlobalTemplate(
ShellRunner* runner,
v8::Isolate* isolate) {
return v8::Local<v8::ObjectTemplate>();
}
void ShellRunnerDelegate::DidCreateContext(ShellRunner* runner) {
}
void ShellRunnerDelegate::WillRunScript(ShellRunner* runner) {
}
void ShellRunnerDelegate::DidRunScript(ShellRunner* runner) {
}
void ShellRunnerDelegate::UnhandledException(ShellRunner* runner,
TryCatch& try_catch) {
NOTREACHED() << try_catch.GetStackTrace();
}
ShellRunner::ShellRunner(ShellRunnerDelegate* delegate, v8::Isolate* isolate)
: delegate_(delegate) {
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = v8::Context::New(
isolate, nullptr, delegate_->GetGlobalTemplate(this, isolate));
context_holder_ = std::make_unique<ContextHolder>(isolate);
context_holder_->SetContext(context);
v8::Context::Scope scope(context);
delegate_->DidCreateContext(this);
}
ShellRunner::~ShellRunner() {
// Deleting the ContextRunner deletes the contained PerContextData, which
// writes to the V8 heap in its destructor. Hence enter the isolate before
// doing that.
v8::Isolate* isolate = GetContextHolder()->isolate();
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
context_holder_.reset();
}
v8::MaybeLocal<v8::Value> ShellRunner::Run(const std::string& source,
const std::string& resource_name) {
v8::Isolate* isolate = GetContextHolder()->isolate();
TryCatch try_catch(isolate);
v8::ScriptOrigin origin(StringToV8(isolate, resource_name));
auto maybe_script = v8::Script::Compile(GetContextHolder()->context(),
StringToV8(isolate, source), &origin);
v8::Local<v8::Script> script;
if (!maybe_script.ToLocal(&script)) {
delegate_->UnhandledException(this, try_catch);
return v8::MaybeLocal<v8::Value>();
}
return Run(script);
}
ContextHolder* ShellRunner::GetContextHolder() {
return context_holder_.get();
}
v8::MaybeLocal<v8::Value> ShellRunner::Run(v8::Local<v8::Script> script) {
TryCatch try_catch(GetContextHolder()->isolate());
delegate_->WillRunScript(this);
auto maybe = script->Run(GetContextHolder()->context());
delegate_->DidRunScript(this);
if (maybe.IsEmpty()) {
delegate_->UnhandledException(this, try_catch);
}
return maybe;
}
} // namespace gin
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