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// Copyright 2015 The Chromium Authors
// 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_PLATFORM_LOADER_FETCH_CLIENT_HINTS_PREFERENCES_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_CLIENT_HINTS_PREFERENCES_H_
#include "services/metrics/public/cpp/ukm_source_id.h"
#include "services/network/public/cpp/client_hints.h"
#include "third_party/blink/public/common/client_hints/enabled_client_hints.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace ukm {
class UkmRecorder;
} // namespace ukm
namespace blink {
class KURL;
// TODO (tbansal): Remove PLATFORM_EXPORT, and pass WebClientHintsType
// everywhere.
class PLATFORM_EXPORT ClientHintsPreferences {
DISALLOW_NEW();
public:
class Context {
public:
virtual ukm::SourceId GetUkmSourceId() = 0;
virtual ukm::UkmRecorder* GetUkmRecorder() = 0;
virtual void CountClientHints(network::mojom::WebClientHintsType) = 0;
protected:
virtual ~Context() = default;
};
ClientHintsPreferences();
void UpdateFrom(const ClientHintsPreferences&);
void CombineWith(const ClientHintsPreferences&);
// Parses <meta http-equiv="accept-ch"> or <meta name="accept-ch"> value
// `header_value`, and updates `this` to enable the requested client hints.
// `url` is the URL of the page. `context` may be null. `is_http_equiv` is
// true if 'accept-ch' is an 'http-equiv' attribute and not 'name'.
// `is_doc_preloader` is true if the document preloader and `is_sync_parser`
// is true if the synchronous parser created the element.
// Returns true if `this` is modified.
bool UpdateFromMetaCH(const String& header_value,
const KURL& url,
Context* context,
network::MetaCHType type,
bool is_doc_preloader,
bool is_sync_parser);
bool ShouldSend(network::mojom::WebClientHintsType type) const;
void SetShouldSend(network::mojom::WebClientHintsType type);
// Returns true if client hints are allowed for the provided KURL. Client
// hints are allowed only on HTTP URLs that belong to secure contexts.
static bool IsClientHintsAllowed(const KURL&);
EnabledClientHints GetEnabledClientHints() const;
private:
EnabledClientHints enabled_hints_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_LOADER_FETCH_CLIENT_HINTS_PREFERENCES_H_
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