chromium/third_party/blink/renderer/core/css/style_environment_variables.h

// Copyright 2018 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_CORE_CSS_STYLE_ENVIRONMENT_VARIABLES_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_ENVIRONMENT_VARIABLES_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_variable_data.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"

namespace blink {

class FeatureContext;

// UADefinedVariable contains all user agent defined environment variables with
// a single dimension.
// When adding a new variable the string equivalent needs to be added to
// |GetVariableName|.
enum class UADefinedVariable { … };

enum class UADefinedTwoDimensionalVariable { … };

// StyleEnvironmentVariables stores user agent and user defined CSS environment
// variables. It has a static root instance that stores global values and
// each document has a child that stores document level values.
// Setting and removing values can only be done for the set of variables in
// UADefinedVariable. Note that UADefinedVariables are not always set/defined,
// as they depend on the environment.
class CORE_EXPORT StyleEnvironmentVariables
    : public GarbageCollected<StyleEnvironmentVariables> { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_STYLE_ENVIRONMENT_VARIABLES_H_