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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_UTILS_H_
#define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_UTILS_H_
#include <string>
#include <utility>
#include "base/compiler_specific.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/content_settings/core/common/content_settings_constraints.h"
#include "components/content_settings/core/common/content_settings_pattern.h"
#include "components/content_settings/core/common/content_settings_types.h"
class HostContentSettingsMap;
namespace content_settings {
typedef std::pair<ContentSettingsPattern, ContentSettingsPattern> PatternPair;
// Helper class to iterate over only the values in a map.
template <typename IteratorType, typename ReferenceType>
class MapValueIterator {
public:
explicit MapValueIterator(IteratorType iterator) : iterator_(iterator) {}
friend bool operator==(const MapValueIterator&,
const MapValueIterator&) = default;
MapValueIterator& operator++() {
++iterator_;
return *this;
}
ReferenceType operator*() { return iterator_->second.get(); }
private:
IteratorType iterator_;
};
// These constants are copied from extensions/common/extension_constants.h and
// content/public/common/url_constants.h to avoid complicated dependencies.
const char kChromeDevToolsScheme[] = "devtools";
const char kChromeUIScheme[] = "chrome";
const char kExtensionScheme[] = "chrome-extension";
const char kChromeUIUntrustedScheme[] = "chrome-untrusted";
std::string ContentSettingToString(ContentSetting setting);
// Converts a content setting string to the corresponding ContentSetting.
// Returns true if |name| specifies a valid content setting, false otherwise.
bool ContentSettingFromString(const std::string& name, ContentSetting* setting);
PatternPair ParsePatternString(const std::string& pattern_str);
std::string CreatePatternString(
const ContentSettingsPattern& item_pattern,
const ContentSettingsPattern& top_level_frame_pattern);
// Populates |rules| with content setting rules for content types that are
// handled by the renderer.
void GetRendererContentSettingRules(const HostContentSettingsMap* map,
RendererContentSettingRules* rules);
// Returns true if setting |a| is more permissive than setting |b|.
bool IsMorePermissive(ContentSetting a, ContentSetting b);
// Returns whether or not the supplied constraint should be persistently stored.
bool IsConstraintPersistent(const ContentSettingConstraints& constraints);
// Returns whether the given type supports tracking last_visit timestamps.
bool CanTrackLastVisit(ContentSettingsType type);
// Get a timestamp with week-precision.
base::Time GetCoarseVisitedTime(base::Time time);
// Returns a TimeDelta representing a week.
base::TimeDelta GetCoarseVisitedTimePrecision();
// Returns whether ContentSettingsType is an eligible permission for
// auto-revocation.
bool CanBeAutoRevoked(ContentSettingsType type,
ContentSetting setting,
bool is_one_time = false);
bool CanBeAutoRevoked(ContentSettingsType type,
const base::Value& value,
bool is_one_time = false);
// Returns whether the chooser permission is allowlisted for auto-revoking.
bool IsChooserPermissionEligibleForAutoRevocation(ContentSettingsType type);
// Returns true if the type and metadata correspond
// to a permission decision that was made by Related Website Sets.
bool IsGrantedByRelatedWebsiteSets(ContentSettingsType type,
const RuleMetaData& metadata);
// Returns the list of ContentSettingsTypes that can be granted for a short
// period of time. This means the following:
// - Permission prompts will have a button that is labeled along the lines of
// "Allow this time".
// - The `permissions.query` API will report PermissionStatus.state as
// "granted" within this short time window.
// - Subsequent requests to the permission-gated API in this time window will
// succeed without user mediation.
const std::vector<ContentSettingsType>& GetTypesWithTemporaryGrants();
// Returns a subset of GetTypesWithTemporaryGrants() that are stored in
// OneTimePermissionProvider in HostContentSettingsMap. Other types not stored
// in the provider have their own custom grant expiry logic.
const std::vector<ContentSettingsType>& GetTypesWithTemporaryGrantsInHcsm();
// Returns the list of ContentSettingsTypes which should be actively expired
// upon their expiration. All other expired content settings will only be
// expired upon the first reload after the expiration date.
bool ShouldTypeExpireActively(ContentSettingsType type);
} // namespace content_settings
#endif // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_UTILS_H_
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