1 files changed, 102 insertions, 0 deletions
diff --git a/src/core/client_hints.h b/src/core/client_hints.h
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+++ b/src/core/client_hints.h
@@ -0,0 +1,102 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef CLIENT_HINTS_H_
+#define CLIENT_HINTS_H_
+
+// based on components/client_hints/browser/client_hints.h:
+// 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.
+
+#include "base/memory/raw_ptr.h"
+#include "base/no_destructor.h"
+#include "base/sequence_checker.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "components/keyed_service/core/keyed_service.h"
+#include "content/public/browser/client_hints_controller_delegate.h"
+#include "third_party/blink/public/common/user_agent/user_agent_metadata.h"
+
+namespace QtWebEngineCore {
+
+class ClientHints;
+
+class ClientHintsFactory : public BrowserContextKeyedServiceFactory
+{
+public:
+    ClientHintsFactory(const ClientHintsFactory &) = delete;
+    ClientHintsFactory &operator=(const ClientHintsFactory &) = delete;
+
+    static ClientHints *GetForBrowserContext(content::BrowserContext *browser_context);
+    static ClientHintsFactory *GetInstance();
+
+private:
+    friend class base::NoDestructor<ClientHintsFactory>;
+
+    ClientHintsFactory();
+    ~ClientHintsFactory() override;
+
+    // BrowserContextKeyedServiceFactory methods:
+    KeyedService *BuildServiceInstanceFor(content::BrowserContext *profile) const override;
+    content::BrowserContext *GetBrowserContextToUse(content::BrowserContext *context) const override;
+};
+
+class ClientHints : public KeyedService, public content::ClientHintsControllerDelegate
+{
+public:
+    ClientHints(content::BrowserContext *context);
+
+    ClientHints(const ClientHints &) = delete;
+    ClientHints &operator=(const ClientHints &) = delete;
+
+    ~ClientHints() override;
+
+    // content::ClientHintsControllerDelegate:
+    network::NetworkQualityTracker *GetNetworkQualityTracker() override;
+
+    void GetAllowedClientHintsFromSource(const url::Origin &origin, blink::EnabledClientHints *client_hints) override;
+
+    bool IsJavaScriptAllowed(const GURL &url, content::RenderFrameHost *parent_rfh) override;
+
+    bool AreThirdPartyCookiesBlocked(const GURL &url, content::RenderFrameHost *rfh) override;
+
+    blink::UserAgentMetadata GetUserAgentMetadata() override;
+
+    void PersistClientHints(const url::Origin &primary_origin,
+                            content::RenderFrameHost *parent_rfh,
+                            const std::vector<network::mojom::WebClientHintsType> &client_hints) override;
+
+    void SetAdditionalClientHints(const std::vector<network::mojom::WebClientHintsType> &) override;
+
+    void ClearAdditionalClientHints() override;
+
+    void SetMostRecentMainFrameViewportSize(const gfx::Size&) override;
+    gfx::Size GetMostRecentMainFrameViewportSize() override;
+
+private:
+    SEQUENCE_CHECKER(sequence_checker_);
+
+    raw_ptr<content::BrowserContext> context_ = nullptr;
+
+    // Stores enabled Client Hint types for an origin.
+    std::map<url::Origin, blink::EnabledClientHints> accept_ch_cache_
+        GUARDED_BY_CONTEXT(sequence_checker_);
+
+    // Additional Client Hint types for Client Hints Reliability. If additional
+    // hints are set, they would be included by subsequent calls to
+    // GetAllowedClientHintsFromSource.
+    std::vector<network::mojom::WebClientHintsType> additional_hints_
+        GUARDED_BY_CONTEXT(sequence_checker_);
+
+    std::unique_ptr<network::NetworkQualityTracker> network_quality_tracker_
+        GUARDED_BY_CONTEXT(sequence_checker_);
+
+    // This stores the viewport size of the most recent visible main frame tree
+    // node. This value is only used when the viewport size cannot be directly
+    // queried such as for prefetch requests and for tab restores.
+    gfx::Size viewport_size_;
+};
+
+} // namespace QtWebEngineCore
+
+#endif