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import type {
AnimationInterpolation,
AnimationPropertyPath,
AnimationValue,
AnimationValueKind,
DiscreteValue,
} from "@/types/animation";
import type { TimelineElement } from "@/types/timeline";
import { MIN_TRANSFORM_SCALE } from "@/constants/animation-constants";
import { isVisualElement } from "@/lib/timeline/element-utils";
interface NumericRange {
min?: number;
max?: number;
}
interface AnimationPropertyDefinition {
valueKind: AnimationValueKind;
defaultInterpolation: AnimationInterpolation;
numericRange?: NumericRange;
supportsElement: ({ element }: { element: TimelineElement }) => boolean;
getValue: ({ element }: { element: TimelineElement }) => number | null;
setValue: ({
element,
value,
}: {
element: TimelineElement;
value: number;
}) => TimelineElement;
}
const ANIMATION_PROPERTY_REGISTRY: Record<
AnimationPropertyPath,
AnimationPropertyDefinition
> = {
"transform.position.x": {
valueKind: "number",
defaultInterpolation: "linear",
supportsElement: ({ element }) => isVisualElement(element),
getValue: ({ element }) =>
isVisualElement(element) ? element.transform.position.x : null,
setValue: ({ element, value }) =>
isVisualElement(element)
? {
...element,
transform: {
...element.transform,
position: { ...element.transform.position, x: value },
},
}
: element,
},
"transform.position.y": {
valueKind: "number",
defaultInterpolation: "linear",
supportsElement: ({ element }) => isVisualElement(element),
getValue: ({ element }) =>
isVisualElement(element) ? element.transform.position.y : null,
setValue: ({ element, value }) =>
isVisualElement(element)
? {
...element,
transform: {
...element.transform,
position: { ...element.transform.position, y: value },
},
}
: element,
},
"transform.scale": {
valueKind: "number",
defaultInterpolation: "linear",
numericRange: { min: MIN_TRANSFORM_SCALE },
supportsElement: ({ element }) => isVisualElement(element),
getValue: ({ element }) =>
isVisualElement(element) ? element.transform.scale : null,
setValue: ({ element, value }) =>
isVisualElement(element)
? { ...element, transform: { ...element.transform, scale: value } }
: element,
},
"transform.rotate": {
valueKind: "number",
defaultInterpolation: "linear",
supportsElement: ({ element }) => isVisualElement(element),
getValue: ({ element }) =>
isVisualElement(element) ? element.transform.rotate : null,
setValue: ({ element, value }) =>
isVisualElement(element)
? { ...element, transform: { ...element.transform, rotate: value } }
: element,
},
opacity: {
valueKind: "number",
defaultInterpolation: "linear",
numericRange: { min: 0, max: 1 },
supportsElement: ({ element }) => isVisualElement(element),
getValue: ({ element }) =>
isVisualElement(element) ? element.opacity : null,
setValue: ({ element, value }) =>
isVisualElement(element) ? { ...element, opacity: value } : element,
},
volume: {
valueKind: "number",
defaultInterpolation: "linear",
numericRange: { min: 0, max: 1 },
supportsElement: ({ element }) => element.type === "audio",
getValue: ({ element }) =>
element.type === "audio" ? element.volume : null,
setValue: ({ element, value }) =>
element.type === "audio" ? { ...element, volume: value } : element,
},
};
export function isAnimationPropertyPath({
propertyPath,
}: {
propertyPath: string;
}): boolean {
return propertyPath in ANIMATION_PROPERTY_REGISTRY;
}
export function getAnimationPropertyDefinition({
propertyPath,
}: {
propertyPath: AnimationPropertyPath;
}): AnimationPropertyDefinition {
return ANIMATION_PROPERTY_REGISTRY[propertyPath];
}
export function supportsAnimationProperty({
element,
propertyPath,
}: {
element: TimelineElement;
propertyPath: AnimationPropertyPath;
}): boolean {
const propertyDefinition = getAnimationPropertyDefinition({ propertyPath });
return propertyDefinition.supportsElement({ element });
}
export function getElementBaseValueForProperty({
element,
propertyPath,
}: {
element: TimelineElement;
propertyPath: AnimationPropertyPath;
}): AnimationValue | null {
const definition = getAnimationPropertyDefinition({ propertyPath });
if (!definition.supportsElement({ element })) {
return null;
}
return definition.getValue({ element });
}
export function withElementBaseValueForProperty({
element,
propertyPath,
value,
}: {
element: TimelineElement;
propertyPath: AnimationPropertyPath;
value: AnimationValue;
}): TimelineElement {
const coercedValue = coerceAnimationValueForProperty({ propertyPath, value });
if (coercedValue === null || typeof coercedValue !== "number") {
return element;
}
const definition = getAnimationPropertyDefinition({ propertyPath });
if (!definition.supportsElement({ element })) {
return element;
}
return definition.setValue({ element, value: coercedValue });
}
export function getDefaultInterpolationForProperty({
propertyPath,
}: {
propertyPath: AnimationPropertyPath;
}): AnimationInterpolation {
const propertyDefinition = getAnimationPropertyDefinition({ propertyPath });
return propertyDefinition.defaultInterpolation;
}
function clampNumericRange({
value,
numericRange,
}: {
value: number;
numericRange: NumericRange | undefined;
}): number {
if (!numericRange) {
return value;
}
const minValue = numericRange.min ?? Number.NEGATIVE_INFINITY;
const maxValue = numericRange.max ?? Number.POSITIVE_INFINITY;
return Math.min(maxValue, Math.max(minValue, value));
}
export function coerceAnimationValueForProperty({
propertyPath,
value,
}: {
propertyPath: AnimationPropertyPath;
value: AnimationValue;
}): AnimationValue | null {
const propertyDefinition = getAnimationPropertyDefinition({ propertyPath });
if (propertyDefinition.valueKind === "number") {
if (typeof value !== "number" || Number.isNaN(value)) {
return null;
}
return clampNumericRange({
value,
numericRange: propertyDefinition.numericRange,
});
}
if (propertyDefinition.valueKind === "color") {
return typeof value === "string" ? value : null;
}
if (typeof value === "string" || typeof value === "boolean") {
return value as DiscreteValue;
}
return null;
}
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