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- // Copyright 2019 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 BASE_SCOPED_ADD_FEATURE_FLAGS_H_
- #define BASE_SCOPED_ADD_FEATURE_FLAGS_H_
- #include <string>
- #include <vector>
- #include "base/base_export.h"
- #include "base/feature_list.h"
- #include "base/memory/raw_ptr.h"
- namespace base {
- class CommandLine;
- // Helper class to enable and disable features if they are not already set in
- // the command line. It reads the command line on construction, allows user to
- // enable and disable features during its lifetime, and writes the modified
- // --enable-features=... and --disable-features=... flags back to the command
- // line on destruction.
- class BASE_EXPORT ScopedAddFeatureFlags {
- public:
- explicit ScopedAddFeatureFlags(CommandLine* command_line);
- ScopedAddFeatureFlags(const ScopedAddFeatureFlags&) = delete;
- ScopedAddFeatureFlags& operator=(const ScopedAddFeatureFlags&) = delete;
- ~ScopedAddFeatureFlags();
- // Any existing (user set) enable/disable takes precedence.
- void EnableIfNotSet(const Feature& feature);
- void DisableIfNotSet(const Feature& feature);
- void EnableIfNotSetWithParameter(const Feature& feature,
- StringPiece name,
- StringPiece value);
- // Check if the feature is enabled from command line or functions above
- bool IsEnabled(const Feature& feature);
- // Check if the feature with the given parameter name and value is enabled
- // from command line or functions above. An empty parameter name means that we
- // are checking if the feature is enabled without any parameter.
- bool IsEnabledWithParameter(const Feature& feature,
- StringPiece parameter_name,
- StringPiece parameter_value);
- private:
- void AddFeatureIfNotSet(const Feature& feature,
- StringPiece suffix,
- bool enable);
- const raw_ptr<CommandLine> command_line_;
- std::vector<std::string> enabled_features_;
- std::vector<std::string> disabled_features_;
- };
- } // namespace base
- #endif // BASE_SCOPED_ADD_FEATURE_FLAGS_H_
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