// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "third_party/blink/renderer/core/animation/css_interpolation_environment.h"

#include "third_party/blink/renderer/core/animation/property_handle.h"
#include "third_party/blink/renderer/core/css/resolver/cascade_resolver.h"
#include "third_party/blink/renderer/core/css/resolver/style_cascade.h"
#include "third_party/blink/renderer/core/css/resolver/style_resolver.h"

namespace blink {

const CSSValue* CSSInterpolationEnvironment::Resolve(
    const PropertyHandle& property,
    const CSSValue* value,
    const TreeScope* tree_scope) const {
  DCHECK(cascade_);
  DCHECK(cascade_resolver_);
  if (value) {
    // TODO: If we support env() within @keyframe, we may need to support
    // non-nullptr env_bindings here.
    const CSSValue* resolved_value =
        cascade_->Resolve(property.GetCSSPropertyName(), *value, tree_scope,
                          /*env_bindings=*/nullptr, CascadeOrigin::kAnimation,
                          *cascade_resolver_);
    if (resolved_value) {
      return &resolved_value->EnsureScopedValue(tree_scope);
    }
  }
  return nullptr;
}

}  // namespace blink