// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_TREES_PROPERTY_TREE_LAYER_TREE_DELEGATE_H_
#define CC_TREES_PROPERTY_TREE_LAYER_TREE_DELEGATE_H_

#include <optional>

#include "base/memory/raw_ptr.h"
#include "cc/cc_export.h"
#include "cc/input/scroll_snap_data.h"
#include "cc/paint/element_id.h"
#include "cc/trees/mutator_host_delegate.h"
#include "cc/trees/property_tree_delegate.h"

namespace gfx {
class Vector2dF;
class Transform;
}  // namespace gfx

namespace cc {

class LayerTreeHost;

// This is the default implementation of PropertyTreeDelegate that
// is used when the LayerTreeHost is in the legacy layer tree mode.
// TODO(crbug.com/389771428): This will eventually be removed once the
// ui::Compositor has been updated to use a LayerTreeHost in layer list mode.
// The multiple implementations of PropertyTreeDelegate will no longer be
// needed and the PropertyTreeLayerListDelegate's implementation can be
// merged back into the LayerTreeHost (if so desired).
class CC_EXPORT PropertyTreeLayerTreeDelegate : public PropertyTreeDelegate {
 public:
  // PropertyTreeDelegate overrides.
  void SetLayerTreeHost(LayerTreeHost* host) override;
  LayerTreeHost* host() override;
  const LayerTreeHost* host() const override;
  void UpdatePropertyTreesIfNeeded() override;
  void UpdateScrollOffsetFromImpl(
      const ElementId& id,
      const gfx::Vector2dF& delta,
      ScrollSourceType type,
      const std::optional<TargetSnapAreaElementIds>& snap_target_ids) override;
  void OnAnimateLayers() override;
  void RegisterViewportPropertyIds(const ViewportPropertyIds& ids) override;
  void OnUnregisterElement(ElementId id) override;
  bool IsElementInPropertyTrees(ElementId element_id,
                                ElementListType list_type) const override;
  void OnElementFilterMutated(ElementId element_id,
                              ElementListType list_type,
                              const FilterOperations& filters) override;
  void OnElementBackdropFilterMutated(
      ElementId element_id,
      ElementListType list_type,
      const FilterOperations& backdrop_filters) override;
  void OnElementOpacityMutated(ElementId element_id,
                               ElementListType list_type,
                               float opacity) override;
  void OnElementTransformMutated(ElementId element_id,
                                 ElementListType list_type,
                                 const gfx::Transform& transform) override;

 private:
  raw_ptr<LayerTreeHost> host_ = nullptr;
};

}  // namespace cc

#endif  // CC_TREES_PROPERTY_TREE_LAYER_TREE_DELEGATE_H_