@tamagui/react-native-web-lite
Version:
React Native for Web
161 lines (160 loc) • 8.55 kB
JavaScript
"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all) __defProp(target, name, {
get: all[name],
enumerable: !0
});
},
__copyProps = (to, from, except, desc) => {
if (from && typeof from == "object" || typeof from == "function") for (let key of __getOwnPropNames(from)) !__hasOwnProp.call(to, key) && key !== except && __defProp(to, key, {
get: () => from[key],
enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable
});
return to;
};
var __toCommonJS = mod => __copyProps(__defProp({}, "__esModule", {
value: !0
}), mod);
var SpringAnimation_exports = {};
__export(SpringAnimation_exports, {
SpringAnimation: () => SpringAnimation,
default: () => SpringAnimation_default
});
module.exports = __toCommonJS(SpringAnimation_exports);
var import_Animation = require("./Animation.cjs"),
import_SpringConfig = require("../SpringConfig.cjs"),
import_react_native_web_internals = require("@tamagui/react-native-web-internals"),
import_NativeAnimatedHelper = require("../NativeAnimatedHelper.cjs");
class SpringAnimation extends import_Animation.Animation {
_overshootClamping;
_restDisplacementThreshold;
_restSpeedThreshold;
_lastVelocity;
_startPosition;
_lastPosition;
_fromValue;
_toValue;
_stiffness;
_damping;
_mass;
_initialVelocity;
_delay;
_timeout;
_startTime;
_lastTime;
_frameTime;
_onUpdate;
_animationFrame;
_useNativeDriver;
_platformConfig;
constructor(config) {
if (super(), this._overshootClamping = config.overshootClamping ?? !1, this._restDisplacementThreshold = config.restDisplacementThreshold ?? 1e-3, this._restSpeedThreshold = config.restSpeedThreshold ?? 1e-3, this._initialVelocity = config.velocity ?? 0, this._lastVelocity = config.velocity ?? 0, this._toValue = config.toValue, this._delay = config.delay ?? 0, this._useNativeDriver = (0, import_NativeAnimatedHelper.shouldUseNativeDriver)(config), this._platformConfig = config.platformConfig, this.__isInteraction = config.isInteraction ?? !this._useNativeDriver, this.__iterations = config.iterations ?? 1, config.stiffness !== void 0 || config.damping !== void 0 || config.mass !== void 0) (0, import_react_native_web_internals.invariant)(config.bounciness === void 0 && config.speed === void 0 && config.tension === void 0 && config.friction === void 0, "You can define one of bounciness/speed, tension/friction, or stiffness/damping/mass, but not more than one"), this._stiffness = config.stiffness ?? 100, this._damping = config.damping ?? 10, this._mass = config.mass ?? 1;else if (config.bounciness !== void 0 || config.speed !== void 0) {
(0, import_react_native_web_internals.invariant)(config.tension === void 0 && config.friction === void 0 && config.stiffness === void 0 && config.damping === void 0 && config.mass === void 0, "You can define one of bounciness/speed, tension/friction, or stiffness/damping/mass, but not more than one");
const springConfig = import_SpringConfig.SpringConfig.fromBouncinessAndSpeed(config.bounciness ?? 8, config.speed ?? 12);
this._stiffness = springConfig.stiffness, this._damping = springConfig.damping, this._mass = 1;
} else {
const springConfig = import_SpringConfig.SpringConfig.fromOrigamiTensionAndFriction(config.tension ?? 40, config.friction ?? 7);
this._stiffness = springConfig.stiffness, this._damping = springConfig.damping, this._mass = 1;
}
(0, import_react_native_web_internals.invariant)(this._stiffness > 0, "Stiffness value must be greater than 0"), (0, import_react_native_web_internals.invariant)(this._damping > 0, "Damping value must be greater than 0"), (0, import_react_native_web_internals.invariant)(this._mass > 0, "Mass value must be greater than 0");
}
__getNativeAnimationConfig() {
return {
type: "spring",
overshootClamping: this._overshootClamping,
restDisplacementThreshold: this._restDisplacementThreshold,
restSpeedThreshold: this._restSpeedThreshold,
stiffness: this._stiffness,
damping: this._damping,
mass: this._mass,
initialVelocity: this._initialVelocity ?? this._lastVelocity,
toValue: this._toValue,
iterations: this.__iterations,
platformConfig: this._platformConfig
};
}
start(fromValue, onUpdate, onEnd, previousAnimation, animatedValue) {
if (this.__active = !0, this._startPosition = fromValue, this._lastPosition = this._startPosition, this._onUpdate = onUpdate, this.__onEnd = onEnd, this._lastTime = Date.now(), this._frameTime = 0, previousAnimation instanceof SpringAnimation) {
const internalState = previousAnimation.getInternalState();
this._lastPosition = internalState.lastPosition, this._lastVelocity = internalState.lastVelocity, this._initialVelocity = this._lastVelocity, this._lastTime = internalState.lastTime;
}
const start = () => {
this._useNativeDriver ? this.__startNativeAnimation(animatedValue) : this.onUpdate();
};
this._delay ? this._timeout = setTimeout(start, this._delay) : start();
}
getInternalState() {
return {
lastPosition: this._lastPosition,
lastVelocity: this._lastVelocity,
lastTime: this._lastTime
};
}
/**
* This spring model is based off of a damped harmonic oscillator
* (https://en.wikipedia.org/wiki/Harmonic_oscillator#Damped_harmonic_oscillator).
*
* We use the closed form of the second order differential equation:
*
* x'' + (2ζ⍵_0)x' + ⍵^2x = 0
*
* where
* ⍵_0 = √(k / m) (undamped angular frequency of the oscillator),
* ζ = c / 2√mk (damping ratio),
* c = damping constant
* k = stiffness
* m = mass
*
* The derivation of the closed form is described in detail here:
* http://planetmath.org/sites/default/files/texpdf/39745.pdf
*
* This algorithm happens to match the algorithm used by CASpringAnimation,
* a QuartzCore (iOS) API that creates spring animations.
*/
onUpdate() {
let now = Date.now();
now > this._lastTime + 64 && (now = this._lastTime + 64);
const deltaTime = (now - this._lastTime) / 1e3;
this._frameTime += deltaTime;
const c = this._damping,
m = this._mass,
k = this._stiffness,
v0 = -this._initialVelocity,
zeta = c / (2 * Math.sqrt(k * m)),
omega0 = Math.sqrt(k / m),
omega1 = omega0 * Math.sqrt(1 - zeta * zeta),
x0 = this._toValue - this._startPosition;
let position = 0,
velocity = 0;
const t = this._frameTime;
if (zeta < 1) {
const envelope = Math.exp(-zeta * omega0 * t);
position = this._toValue - envelope * ((v0 + zeta * omega0 * x0) / omega1 * Math.sin(omega1 * t) + x0 * Math.cos(omega1 * t)), velocity = zeta * omega0 * envelope * (Math.sin(omega1 * t) * (v0 + zeta * omega0 * x0) / omega1 + x0 * Math.cos(omega1 * t)) - envelope * (Math.cos(omega1 * t) * (v0 + zeta * omega0 * x0) - omega1 * x0 * Math.sin(omega1 * t));
} else {
const envelope = Math.exp(-omega0 * t);
position = this._toValue - envelope * (x0 + (v0 + omega0 * x0) * t), velocity = envelope * (v0 * (t * omega0 - 1) + t * x0 * (omega0 * omega0));
}
if (this._lastTime = now, this._lastPosition = position, this._lastVelocity = velocity, this._onUpdate(position), !this.__active) return;
let isOvershooting = !1;
this._overshootClamping && this._stiffness !== 0 && (this._startPosition < this._toValue ? isOvershooting = position > this._toValue : isOvershooting = position < this._toValue);
const isVelocity = Math.abs(velocity) <= this._restSpeedThreshold;
let isDisplacement = !0;
if (this._stiffness !== 0 && (isDisplacement = Math.abs(this._toValue - position) <= this._restDisplacementThreshold), isOvershooting || isVelocity && isDisplacement) {
this._stiffness !== 0 && (this._lastPosition = this._toValue, this._lastVelocity = 0, this._onUpdate(this._toValue)), this.__debouncedOnEnd({
finished: !0
});
return;
}
this._animationFrame = requestAnimationFrame(this.onUpdate.bind(this));
}
stop() {
super.stop(), this.__active = !1, clearTimeout(this._timeout), global.cancelAnimationFrame(this._animationFrame), this.__debouncedOnEnd({
finished: !1
});
}
}
var SpringAnimation_default = SpringAnimation;