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// Copyright 2015 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 THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_INHERITED_VARIABLES_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_INHERITED_VARIABLES_H_
#include "third_party/blink/renderer/core/css/css_value.h"
#include "third_party/blink/renderer/core/css/css_variable_data.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 StyleInheritedVariables : public RefCounted<StyleInheritedVariables> {
public:
static scoped_refptr<StyleInheritedVariables> Create() {
return base::AdoptRef(new StyleInheritedVariables());
}
scoped_refptr<StyleInheritedVariables> Copy() {
return base::AdoptRef(new StyleInheritedVariables(*this));
}
bool operator==(const StyleInheritedVariables& other) const;
bool operator!=(const StyleInheritedVariables& other) const {
return !(*this == other);
}
void SetVariable(const AtomicString& name,
scoped_refptr<CSSVariableData> value) {
data_.Set(name, std::move(value));
}
CSSVariableData* GetVariable(const AtomicString& name) const;
void RemoveVariable(const AtomicString&);
void SetRegisteredVariable(const AtomicString&, const CSSValue*);
const CSSValue* RegisteredVariable(const AtomicString&) const;
// This map will contain null pointers if variables are invalid due to
// cycles or referencing invalid variables without using a fallback.
// Note that this method is slow as a new map is constructed.
std::unique_ptr<HashMap<AtomicString, scoped_refptr<CSSVariableData>>>
GetVariables() const;
private:
StyleInheritedVariables() : root_(nullptr) {}
StyleInheritedVariables(StyleInheritedVariables& other);
friend class CSSVariableResolver;
HashMap<AtomicString, scoped_refptr<CSSVariableData>> data_;
HashMap<AtomicString, Persistent<CSSValue>> registered_data_;
scoped_refptr<StyleInheritedVariables> root_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_INHERITED_VARIABLES_H_
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