288 lines
12 KiB
JavaScript
288 lines
12 KiB
JavaScript
'use strict';
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exports.__esModule = true;
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var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };
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var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { 'default': obj }; }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }
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function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
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var _mapToZero = require('./mapToZero');
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var _mapToZero2 = _interopRequireDefault(_mapToZero);
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var _stripStyle = require('./stripStyle');
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var _stripStyle2 = _interopRequireDefault(_stripStyle);
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var _stepper3 = require('./stepper');
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var _stepper4 = _interopRequireDefault(_stepper3);
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var _performanceNow = require('performance-now');
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var _performanceNow2 = _interopRequireDefault(_performanceNow);
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var _raf = require('raf');
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var _raf2 = _interopRequireDefault(_raf);
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var _shouldStopAnimation = require('./shouldStopAnimation');
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var _shouldStopAnimation2 = _interopRequireDefault(_shouldStopAnimation);
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var _react = require('react');
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var _react2 = _interopRequireDefault(_react);
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var _propTypes = require('prop-types');
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var _propTypes2 = _interopRequireDefault(_propTypes);
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var msPerFrame = 1000 / 60;
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function shouldStopAnimationAll(currentStyles, styles, currentVelocities) {
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for (var i = 0; i < currentStyles.length; i++) {
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if (!_shouldStopAnimation2['default'](currentStyles[i], styles[i], currentVelocities[i])) {
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return false;
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}
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}
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return true;
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}
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var StaggeredMotion = (function (_React$Component) {
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_inherits(StaggeredMotion, _React$Component);
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_createClass(StaggeredMotion, null, [{
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key: 'propTypes',
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value: {
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// TOOD: warn against putting a config in here
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defaultStyles: _propTypes2['default'].arrayOf(_propTypes2['default'].objectOf(_propTypes2['default'].number)),
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styles: _propTypes2['default'].func.isRequired,
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children: _propTypes2['default'].func.isRequired
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},
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enumerable: true
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}]);
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function StaggeredMotion(props) {
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var _this = this;
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_classCallCheck(this, StaggeredMotion);
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_React$Component.call(this, props);
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this.animationID = null;
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this.prevTime = 0;
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this.accumulatedTime = 0;
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this.unreadPropStyles = null;
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this.clearUnreadPropStyle = function (unreadPropStyles) {
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var _state = _this.state;
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var currentStyles = _state.currentStyles;
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var currentVelocities = _state.currentVelocities;
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var lastIdealStyles = _state.lastIdealStyles;
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var lastIdealVelocities = _state.lastIdealVelocities;
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var someDirty = false;
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for (var i = 0; i < unreadPropStyles.length; i++) {
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var unreadPropStyle = unreadPropStyles[i];
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var dirty = false;
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for (var key in unreadPropStyle) {
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if (!Object.prototype.hasOwnProperty.call(unreadPropStyle, key)) {
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continue;
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}
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var styleValue = unreadPropStyle[key];
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if (typeof styleValue === 'number') {
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if (!dirty) {
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dirty = true;
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someDirty = true;
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currentStyles[i] = _extends({}, currentStyles[i]);
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currentVelocities[i] = _extends({}, currentVelocities[i]);
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lastIdealStyles[i] = _extends({}, lastIdealStyles[i]);
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lastIdealVelocities[i] = _extends({}, lastIdealVelocities[i]);
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}
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currentStyles[i][key] = styleValue;
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currentVelocities[i][key] = 0;
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lastIdealStyles[i][key] = styleValue;
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lastIdealVelocities[i][key] = 0;
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}
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}
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}
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if (someDirty) {
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_this.setState({ currentStyles: currentStyles, currentVelocities: currentVelocities, lastIdealStyles: lastIdealStyles, lastIdealVelocities: lastIdealVelocities });
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}
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};
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this.startAnimationIfNecessary = function () {
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// TODO: when config is {a: 10} and dest is {a: 10} do we raf once and
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// call cb? No, otherwise accidental parent rerender causes cb trigger
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_this.animationID = _raf2['default'](function (timestamp) {
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var destStyles = _this.props.styles(_this.state.lastIdealStyles);
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// check if we need to animate in the first place
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if (shouldStopAnimationAll(_this.state.currentStyles, destStyles, _this.state.currentVelocities)) {
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// no need to cancel animationID here; shouldn't have any in flight
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_this.animationID = null;
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_this.accumulatedTime = 0;
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return;
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}
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var currentTime = timestamp || _performanceNow2['default']();
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var timeDelta = currentTime - _this.prevTime;
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_this.prevTime = currentTime;
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_this.accumulatedTime = _this.accumulatedTime + timeDelta;
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// more than 10 frames? prolly switched browser tab. Restart
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if (_this.accumulatedTime > msPerFrame * 10) {
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_this.accumulatedTime = 0;
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}
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if (_this.accumulatedTime === 0) {
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// no need to cancel animationID here; shouldn't have any in flight
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_this.animationID = null;
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_this.startAnimationIfNecessary();
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return;
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}
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var currentFrameCompletion = (_this.accumulatedTime - Math.floor(_this.accumulatedTime / msPerFrame) * msPerFrame) / msPerFrame;
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var framesToCatchUp = Math.floor(_this.accumulatedTime / msPerFrame);
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var newLastIdealStyles = [];
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var newLastIdealVelocities = [];
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var newCurrentStyles = [];
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var newCurrentVelocities = [];
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for (var i = 0; i < destStyles.length; i++) {
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var destStyle = destStyles[i];
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var newCurrentStyle = {};
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var newCurrentVelocity = {};
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var newLastIdealStyle = {};
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var newLastIdealVelocity = {};
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for (var key in destStyle) {
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if (!Object.prototype.hasOwnProperty.call(destStyle, key)) {
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continue;
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}
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var styleValue = destStyle[key];
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if (typeof styleValue === 'number') {
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newCurrentStyle[key] = styleValue;
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newCurrentVelocity[key] = 0;
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newLastIdealStyle[key] = styleValue;
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newLastIdealVelocity[key] = 0;
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} else {
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var newLastIdealStyleValue = _this.state.lastIdealStyles[i][key];
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var newLastIdealVelocityValue = _this.state.lastIdealVelocities[i][key];
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for (var j = 0; j < framesToCatchUp; j++) {
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var _stepper = _stepper4['default'](msPerFrame / 1000, newLastIdealStyleValue, newLastIdealVelocityValue, styleValue.val, styleValue.stiffness, styleValue.damping, styleValue.precision);
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newLastIdealStyleValue = _stepper[0];
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newLastIdealVelocityValue = _stepper[1];
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}
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var _stepper2 = _stepper4['default'](msPerFrame / 1000, newLastIdealStyleValue, newLastIdealVelocityValue, styleValue.val, styleValue.stiffness, styleValue.damping, styleValue.precision);
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var nextIdealX = _stepper2[0];
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var nextIdealV = _stepper2[1];
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newCurrentStyle[key] = newLastIdealStyleValue + (nextIdealX - newLastIdealStyleValue) * currentFrameCompletion;
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newCurrentVelocity[key] = newLastIdealVelocityValue + (nextIdealV - newLastIdealVelocityValue) * currentFrameCompletion;
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newLastIdealStyle[key] = newLastIdealStyleValue;
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newLastIdealVelocity[key] = newLastIdealVelocityValue;
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}
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}
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newCurrentStyles[i] = newCurrentStyle;
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newCurrentVelocities[i] = newCurrentVelocity;
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newLastIdealStyles[i] = newLastIdealStyle;
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newLastIdealVelocities[i] = newLastIdealVelocity;
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}
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_this.animationID = null;
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// the amount we're looped over above
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_this.accumulatedTime -= framesToCatchUp * msPerFrame;
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_this.setState({
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currentStyles: newCurrentStyles,
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currentVelocities: newCurrentVelocities,
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lastIdealStyles: newLastIdealStyles,
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lastIdealVelocities: newLastIdealVelocities
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});
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_this.unreadPropStyles = null;
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_this.startAnimationIfNecessary();
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});
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};
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this.state = this.defaultState();
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}
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StaggeredMotion.prototype.defaultState = function defaultState() {
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var _props = this.props;
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var defaultStyles = _props.defaultStyles;
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var styles = _props.styles;
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var currentStyles = defaultStyles || styles().map(_stripStyle2['default']);
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var currentVelocities = currentStyles.map(function (currentStyle) {
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return _mapToZero2['default'](currentStyle);
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});
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return {
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currentStyles: currentStyles,
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currentVelocities: currentVelocities,
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lastIdealStyles: currentStyles,
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lastIdealVelocities: currentVelocities
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};
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};
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StaggeredMotion.prototype.componentDidMount = function componentDidMount() {
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this.prevTime = _performanceNow2['default']();
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this.startAnimationIfNecessary();
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};
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StaggeredMotion.prototype.componentWillReceiveProps = function componentWillReceiveProps(props) {
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if (this.unreadPropStyles != null) {
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// previous props haven't had the chance to be set yet; set them here
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this.clearUnreadPropStyle(this.unreadPropStyles);
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}
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this.unreadPropStyles = props.styles(this.state.lastIdealStyles);
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if (this.animationID == null) {
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this.prevTime = _performanceNow2['default']();
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this.startAnimationIfNecessary();
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}
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};
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StaggeredMotion.prototype.componentWillUnmount = function componentWillUnmount() {
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if (this.animationID != null) {
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_raf2['default'].cancel(this.animationID);
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this.animationID = null;
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}
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};
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StaggeredMotion.prototype.render = function render() {
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var renderedChildren = this.props.children(this.state.currentStyles);
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return renderedChildren && _react2['default'].Children.only(renderedChildren);
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};
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return StaggeredMotion;
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})(_react2['default'].Component);
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exports['default'] = StaggeredMotion;
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module.exports = exports['default'];
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// it's possible that currentStyle's value is stale: if props is immediately
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// changed from 0 to 400 to spring(0) again, the async currentStyle is still
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// at 0 (didn't have time to tick and interpolate even once). If we naively
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// compare currentStyle with destVal it'll be 0 === 0 (no animation, stop).
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// In reality currentStyle should be 400
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// after checking for unreadPropStyles != null, we manually go set the
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// non-interpolating values (those that are a number, without a spring
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// config)
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