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// Copyright 2017 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_EXPORTED_WORKER_SHADOW_PAGE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_EXPORTED_WORKER_SHADOW_PAGE_H_
#include "services/network/public/cpp/shared_url_loader_factory.h"
#include "third_party/blink/public/common/privacy_preferences.h"
#include "third_party/blink/public/web/web_document_loader.h"
#include "third_party/blink/public/web/web_local_frame_client.h"
#include "third_party/blink/public/web/web_view.h"
#include "third_party/blink/renderer/core/exported/web_dev_tools_agent_impl.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
namespace network {
class SharedURLLoaderFactory;
}
namespace blink {
class WebApplicationCacheHost;
class WebApplicationCacheHostClient;
class WebSettings;
// WorkerShadowPage implements the 'shadow page' concept.
//
// Loading components are strongly associated with frames, but out-of-process
// workers (i.e., SharedWorker and ServiceWorker) don't have frames. To enable
// loading on such workers, this class provides a virtual frame (a.k.a, shadow
// page) to them. Note that this class is now only used for main script loading.
//
// WorkerShadowPage lives on the main thread.
//
// TODO(nhiroki): Move this into core/workers once all dependencies on
// core/exported are gone (now depending on core/exported/WebViewImpl.h in
// *.cpp).
// TODO(kinuko): Make this go away (https://crbug.com/538751).
class CORE_EXPORT WorkerShadowPage : public WebLocalFrameClient {
public:
class CORE_EXPORT Client : public WebDevToolsAgentImpl::WorkerClient {
public:
~Client() override = default;
// Called when the shadow page is requested to create an application cache
// host.
virtual std::unique_ptr<WebApplicationCacheHost> CreateApplicationCacheHost(
WebApplicationCacheHostClient*) = 0;
// Called when Initialize() is completed.
virtual void OnShadowPageInitialized() = 0;
virtual const base::UnguessableToken& GetDevToolsWorkerToken() = 0;
};
// If |loader_factory| is non-null, the shadow page will use it when making
// requests.
WorkerShadowPage(
Client* client,
scoped_refptr<network::SharedURLLoaderFactory> loader_factory,
PrivacyPreferences preferences);
~WorkerShadowPage() override;
// Initializes this instance and calls Client::OnShadowPageInitialized() when
// complete.
void Initialize(const KURL& script_url);
// WebLocalFrameClient overrides.
std::unique_ptr<WebApplicationCacheHost> CreateApplicationCacheHost(
WebApplicationCacheHostClient*) override;
// Note: usually WebLocalFrameClient implementations override
// WebLocalFrameClient to call Close() on the corresponding WebLocalFrame.
// Shadow pages are set up a bit differently and clear the WebLocalFrameClient
// pointer before shutting down, so the shadow page must also manually call
// Close() on the corresponding frame and its widget.
void DidFinishDocumentLoad() override;
std::unique_ptr<blink::WebURLLoaderFactory> CreateURLLoaderFactory() override;
base::UnguessableToken GetDevToolsFrameToken() override;
void WillSendRequest(WebURLRequest&) override;
void BeginNavigation(std::unique_ptr<WebNavigationInfo> info) override;
Document* GetDocument() { return main_frame_->GetFrame()->GetDocument(); }
WebSettings* GetSettings() { return web_view_->GetSettings(); }
WebDocumentLoader* DocumentLoader() {
return main_frame_->GetDocumentLoader();
}
WebDevToolsAgentImpl* DevToolsAgent();
bool WasInitialized() const;
private:
enum class State { kUninitialized, kInitializing, kInitialized };
void AdvanceState(State);
Client* client_;
WebView* web_view_;
Persistent<WebLocalFrameImpl> main_frame_;
scoped_refptr<network::SharedURLLoaderFactory> loader_factory_;
// TODO(crbug.com/862854): Update the values when the browser process changes
// the preferences.
const PrivacyPreferences preferences_;
State state_ = State::kUninitialized;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_EXPORTED_WORKER_SHADOW_PAGE_H_
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