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// Copyright (c) 2020 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 CONTENT_COMMON_CONTENT_NAVIGATION_POLICY_H_
#define CONTENT_COMMON_CONTENT_NAVIGATION_POLICY_H_
#include "content/common/content_export.h"
#include <array>
#include <string>
namespace content {
CONTENT_EXPORT bool IsBackForwardCacheEnabled();
CONTENT_EXPORT bool DeviceHasEnoughMemoryForBackForwardCache();
// Levels of ProactivelySwapBrowsingInstance support.
// These are additive; features enabled at lower levels remain enabled at all
// higher levels.
enum class ProactivelySwapBrowsingInstanceLevel {
kDisabled = 0,
// Swap BrowsingInstance and renderer process on cross-site navigations.
kCrossSiteSwapProcess = 1,
// Swap BrowsingInstance on cross-site navigations, but try to reuse the
// current renderer process if possible.
kCrossSiteReuseProcess = 2,
// Swap BrowsingInstance swap on same-site navigations, with process reuse.
kSameSite = 3,
kMaxValue = kSameSite,
};
// Levels of ProactivelySwapBrowsingInstance as strings (excluding kDisabled).
CONTENT_EXPORT std::array<
std::string,
static_cast<size_t>(ProactivelySwapBrowsingInstanceLevel::kMaxValue)>
ProactivelySwapBrowsingInstanceFeatureEnabledLevelValues();
// Whether ProactivelySwapBrowsingInstance is enabled or not. Will return true
// if the value is set to either of {kCrossSiteSwapProcess,
// kCrossSiteReuseProcess, kSameSite}.
CONTENT_EXPORT bool IsProactivelySwapBrowsingInstanceEnabled();
// Whether ProactivelySwapBrowsingInstance with process reuse is enabled or not.
// Will return true if the value is set to either of {kCrossSiteReuseProcess,
// kSameSite}.
CONTENT_EXPORT bool IsProactivelySwapBrowsingInstanceWithProcessReuseEnabled();
// Whether ProactivelySwapBrowsingInstance for same-site navigation is enabled
// or not. Will return true if the value is set to kSameSite.
CONTENT_EXPORT bool
IsProactivelySwapBrowsingInstanceOnSameSiteNavigationEnabled();
CONTENT_EXPORT extern const char
kProactivelySwapBrowsingInstanceLevelParameterName[];
// Levels of RenderDocument support. These are additive in that features enabled
// at lower levels remain enabled at all higher levels.
enum class RenderDocumentLevel {
kDisabled = 0,
// Do not reused RenderFrameHosts when recovering from crashes.
kCrashedFrame = 1,
// Also do not reuse RenderFrameHosts when navigating subframes.
kSubframe = 2,
};
CONTENT_EXPORT bool CreateNewHostForSameSiteSubframe();
CONTENT_EXPORT RenderDocumentLevel GetRenderDocumentLevel();
CONTENT_EXPORT std::string GetRenderDocumentLevelName(
RenderDocumentLevel level);
CONTENT_EXPORT extern const char kRenderDocumentLevelParameterName[];
} // namespace content
#endif // CONTENT_COMMON_CONTENT_NAVIGATION_POLICY_H_
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