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// 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_client.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,
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_
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