chromium/third_party/blink/renderer/core/css/cssom/prepopulated_computed_style_property_map.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_CSSOM_PREPOPULATED_COMPUTED_STYLE_PROPERTY_MAP_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_PREPOPULATED_COMPUTED_STYLE_PROPERTY_MAP_H_

#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/cssom/style_property_map_read_only_main_thread.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/atomic_string_hash.h"

namespace blink {

class ComputedStyle;

// This class has the same behaviour as the ComputedStylePropertyMap, except it
// only contains the properties given to the constructor.
//
// It is to be used with the Houdini APIs (css-paint-api, css-layout-api) which
// require style maps with a subset of properties.
//
// It will pre-populate internal maps (property->CSSValue), as the above APIs
// have a high probability of querying the values inside the map, however as a
// result when the ComputedStyle changes UpdateStyle needs to be called to
// re-populate the internal maps.
class CORE_EXPORT PrepopulatedComputedStylePropertyMap
    : public StylePropertyMapReadOnlyMainThread { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSSOM_PREPOPULATED_COMPUTED_STYLE_PROPERTY_MAP_H_