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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "modules/worklet/Worklet.h"
#include "bindings/core/v8/ScriptPromiseResolver.h"
#include "bindings/core/v8/ScriptSourceCode.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/WorkerOrWorkletScriptController.h"
#include "core/dom/DOMException.h"
#include "core/dom/ExceptionCode.h"
#include "core/inspector/InspectorInstrumentation.h"
#include "modules/worklet/WorkletGlobalScope.h"
namespace blink {
// static
Worklet* Worklet::create(LocalFrame* frame, ExecutionContext* executionContext)
{
Worklet* worklet = new Worklet(frame, executionContext);
worklet->suspendIfNeeded();
return worklet;
}
Worklet::Worklet(LocalFrame* frame, ExecutionContext* executionContext)
: ActiveDOMObject(executionContext)
, m_workletGlobalScope(WorkletGlobalScope::create(frame, executionContext->url(), executionContext->userAgent(), executionContext->getSecurityOrigin(), toIsolate(executionContext)))
{
}
ScriptPromise Worklet::import(ScriptState* scriptState, const String& url)
{
KURL scriptURL = getExecutionContext()->completeURL(url);
if (!scriptURL.isValid()) {
return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(SyntaxError, "'" + url + "' is not a valid URL."));
}
// TODO(ikilpatrick): Perform upfront CSP checks once we decide on a
// CSP-policy for worklets.
ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
m_resolvers.append(resolver);
ScriptPromise promise = resolver->promise();
// TODO(ikilpatrick): WorkerScriptLoader will need to be extended to allow
// module loading support. For now just fetch a 'classic' script.
// NOTE: WorkerScriptLoader may synchronously invoke its callbacks
// (resolving the promise) before we return it.
m_scriptLoaders.append(WorkerScriptLoader::create());
m_scriptLoaders.last()->loadAsynchronously(*getExecutionContext(), scriptURL, DenyCrossOriginRequests,
getExecutionContext()->securityContext().addressSpace(),
bind(&Worklet::onResponse, this),
bind(&Worklet::onFinished, this, m_scriptLoaders.last().get(), resolver));
return promise;
}
void Worklet::onResponse()
{
// TODO(ikilpatrick): Add devtools instrumentation on worklet script
// resource loading.
}
void Worklet::onFinished(WorkerScriptLoader* scriptLoader, ScriptPromiseResolver* resolver)
{
if (scriptLoader->failed()) {
resolver->reject(DOMException::create(NetworkError));
} else {
// TODO(ikilpatrick): Worklets don't have the same error behaviour
// as workers, etc. For a SyntaxError we should reject, however if
// the script throws a normal error, resolve. For now just resolve.
m_workletGlobalScope->scriptController()->evaluate(ScriptSourceCode(scriptLoader->script(), scriptLoader->url()));
InspectorInstrumentation::scriptImported(m_workletGlobalScope.get(), scriptLoader->identifier(), scriptLoader->script());
resolver->resolve();
}
size_t index = m_scriptLoaders.find(scriptLoader);
ASSERT(index != kNotFound);
ASSERT(m_resolvers[index] == resolver);
m_scriptLoaders.remove(index);
m_resolvers.remove(index);
}
void Worklet::stop()
{
m_workletGlobalScope->scriptController()->willScheduleExecutionTermination();
for (auto scriptLoader : m_scriptLoaders) {
scriptLoader->cancel();
}
}
DEFINE_TRACE(Worklet)
{
visitor->trace(m_resolvers);
visitor->trace(m_workletGlobalScope);
ActiveDOMObject::trace(visitor);
}
} // namespace blink
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