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* Copyright 2018 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkottieUtils_DEFINED
#define SkottieUtils_DEFINED
#include "modules/skottie/include/Skottie.h"
#include "modules/skottie/include/SkottieProperty.h"
#include <memory>
#include <string>
#include <unordered_map>
#include <vector>
namespace skottie_utils {
* CustomPropertyManager implements a property management scheme where color/opacity/transform
* attributes are grouped and manipulated by name (one-to-many mapping).
* - setters apply the value to all properties in a named group
* - getters return all the managed property groups, and the first value within each of them
* (unchecked assumption: all properties within the same group have the same value)
* Attach to an Animation::Builder using the utility methods below to intercept properties and
* markers at build time.
class CustomPropertyManager final {
using PropKey = std::string;
std::vector<PropKey> getColorProps() const;
skottie::ColorPropertyValue getColor(const PropKey&) const;
bool setColor(const PropKey&, const skottie::ColorPropertyValue&);
std::vector<PropKey> getOpacityProps() const;
skottie::OpacityPropertyValue getOpacity(const PropKey&) const;
bool setOpacity(const PropKey&, const skottie::OpacityPropertyValue&);
std::vector<PropKey> getTransformProps() const;
skottie::TransformPropertyValue getTransform(const PropKey&) const;
bool setTransform(const PropKey&, const skottie::TransformPropertyValue&);
struct MarkerInfo {
std::string name;
float t0, t1;
const std::vector<MarkerInfo>& markers() const { return fMarkers; }
// Returns a property observer to be attached to an animation builder.
sk_sp<skottie::PropertyObserver> getPropertyObserver() const;
// Returns a marker observer to be attached to an animation builder.
sk_sp<skottie::MarkerObserver> getMarkerObserver() const;
class PropertyInterceptor;
class MarkerInterceptor;
static std::string acceptKey(const char* name) {
static constexpr char kPrefix = '$';
return (name[0] == kPrefix && name[1] != '\0')
? std::string(name + 1)
: std::string();
sk_sp<PropertyInterceptor> fPropertyInterceptor;
sk_sp<MarkerInterceptor> fMarkerInterceptor;
template <typename T>
using PropGroup = std::vector<std::unique_ptr<T>>;
template <typename T>
using PropMap = std::unordered_map<PropKey, PropGroup<T>>;
template <typename T>
std::vector<PropKey> getProps(const PropMap<T>& container) const;
template <typename V, typename T>
V get(const PropKey&, const PropMap<T>& container) const;
template <typename V, typename T>
bool set(const PropKey&, const V&, const PropMap<T>& container);
PropMap<skottie::ColorPropertyHandle> fColorMap;
PropMap<skottie::OpacityPropertyHandle> fOpacityMap;
PropMap<skottie::TransformPropertyHandle> fTransformMap;
std::vector<MarkerInfo> fMarkers;
} // namespace skottie_utils
#endif // SkottieUtils_DEFINED