462 lines
19 KiB
JavaScript
462 lines
19 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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var motionDom = require('motion-dom');
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var motionUtils = require('motion-utils');
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function isDOMKeyframes(keyframes) {
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return typeof keyframes === "object" && !Array.isArray(keyframes);
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}
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function resolveSubjects(subject, keyframes, scope, selectorCache) {
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if (typeof subject === "string" && isDOMKeyframes(keyframes)) {
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return motionDom.resolveElements(subject, scope, selectorCache);
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}
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else if (subject instanceof NodeList) {
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return Array.from(subject);
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}
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else if (Array.isArray(subject)) {
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return subject;
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}
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else {
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return [subject];
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}
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}
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function calculateRepeatDuration(duration, repeat, _repeatDelay) {
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return duration * (repeat + 1);
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}
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/**
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* Given a absolute or relative time definition and current/prev time state of the sequence,
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* calculate an absolute time for the next keyframes.
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*/
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function calcNextTime(current, next, prev, labels) {
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if (typeof next === "number") {
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return next;
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}
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else if (next.startsWith("-") || next.startsWith("+")) {
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return Math.max(0, current + parseFloat(next));
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}
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else if (next === "<") {
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return prev;
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}
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else if (next.startsWith("<")) {
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return Math.max(0, prev + parseFloat(next.slice(1)));
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}
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else {
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return labels.get(next) ?? current;
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}
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}
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function eraseKeyframes(sequence, startTime, endTime) {
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for (let i = 0; i < sequence.length; i++) {
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const keyframe = sequence[i];
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if (keyframe.at > startTime && keyframe.at < endTime) {
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motionUtils.removeItem(sequence, keyframe);
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// If we remove this item we have to push the pointer back one
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i--;
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}
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}
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}
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function addKeyframes(sequence, keyframes, easing, offset, startTime, endTime) {
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/**
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* Erase every existing value between currentTime and targetTime,
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* this will essentially splice this timeline into any currently
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* defined ones.
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*/
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eraseKeyframes(sequence, startTime, endTime);
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for (let i = 0; i < keyframes.length; i++) {
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sequence.push({
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value: keyframes[i],
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at: motionDom.mixNumber(startTime, endTime, offset[i]),
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easing: motionUtils.getEasingForSegment(easing, i),
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});
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}
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}
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/**
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* Take an array of times that represent repeated keyframes. For instance
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* if we have original times of [0, 0.5, 1] then our repeated times will
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* be [0, 0.5, 1, 1, 1.5, 2]. Loop over the times and scale them back
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* down to a 0-1 scale.
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*/
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function normalizeTimes(times, repeat) {
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for (let i = 0; i < times.length; i++) {
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times[i] = times[i] / (repeat + 1);
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}
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}
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function compareByTime(a, b) {
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if (a.at === b.at) {
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if (a.value === null)
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return 1;
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if (b.value === null)
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return -1;
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return 0;
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}
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else {
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return a.at - b.at;
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}
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}
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const defaultSegmentEasing = "easeInOut";
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const MAX_REPEAT = 20;
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function createAnimationsFromSequence(sequence, { defaultTransition = {}, ...sequenceTransition } = {}, scope, generators) {
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const defaultDuration = defaultTransition.duration || 0.3;
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const animationDefinitions = new Map();
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const sequences = new Map();
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const elementCache = {};
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const timeLabels = new Map();
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let prevTime = 0;
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let currentTime = 0;
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let totalDuration = 0;
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/**
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* Build the timeline by mapping over the sequence array and converting
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* the definitions into keyframes and offsets with absolute time values.
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* These will later get converted into relative offsets in a second pass.
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*/
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for (let i = 0; i < sequence.length; i++) {
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const segment = sequence[i];
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/**
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* If this is a timeline label, mark it and skip the rest of this iteration.
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*/
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if (typeof segment === "string") {
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timeLabels.set(segment, currentTime);
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continue;
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}
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else if (!Array.isArray(segment)) {
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timeLabels.set(segment.name, calcNextTime(currentTime, segment.at, prevTime, timeLabels));
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continue;
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}
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let [subject, keyframes, transition = {}] = segment;
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/**
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* If a relative or absolute time value has been specified we need to resolve
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* it in relation to the currentTime.
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*/
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if (transition.at !== undefined) {
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currentTime = calcNextTime(currentTime, transition.at, prevTime, timeLabels);
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}
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/**
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* Keep track of the maximum duration in this definition. This will be
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* applied to currentTime once the definition has been parsed.
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*/
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let maxDuration = 0;
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const resolveValueSequence = (valueKeyframes, valueTransition, valueSequence, elementIndex = 0, numSubjects = 0) => {
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const valueKeyframesAsList = keyframesAsList(valueKeyframes);
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const { delay = 0, times = motionDom.defaultOffset(valueKeyframesAsList), type = "keyframes", repeat, repeatType, repeatDelay = 0, ...remainingTransition } = valueTransition;
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let { ease = defaultTransition.ease || "easeOut", duration } = valueTransition;
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/**
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* Resolve stagger() if defined.
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*/
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const calculatedDelay = typeof delay === "function"
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? delay(elementIndex, numSubjects)
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: delay;
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/**
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* If this animation should and can use a spring, generate a spring easing function.
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*/
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const numKeyframes = valueKeyframesAsList.length;
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const createGenerator = motionDom.isGenerator(type)
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? type
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: generators?.[type || "keyframes"];
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if (numKeyframes <= 2 && createGenerator) {
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/**
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* As we're creating an easing function from a spring,
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* ideally we want to generate it using the real distance
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* between the two keyframes. However this isn't always
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* possible - in these situations we use 0-100.
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*/
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let absoluteDelta = 100;
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if (numKeyframes === 2 &&
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isNumberKeyframesArray(valueKeyframesAsList)) {
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const delta = valueKeyframesAsList[1] - valueKeyframesAsList[0];
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absoluteDelta = Math.abs(delta);
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}
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const springTransition = { ...remainingTransition };
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if (duration !== undefined) {
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springTransition.duration = motionUtils.secondsToMilliseconds(duration);
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}
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const springEasing = motionDom.createGeneratorEasing(springTransition, absoluteDelta, createGenerator);
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ease = springEasing.ease;
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duration = springEasing.duration;
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}
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duration ?? (duration = defaultDuration);
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const startTime = currentTime + calculatedDelay;
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/**
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* If there's only one time offset of 0, fill in a second with length 1
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*/
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if (times.length === 1 && times[0] === 0) {
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times[1] = 1;
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}
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/**
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* Fill out if offset if fewer offsets than keyframes
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*/
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const remainder = times.length - valueKeyframesAsList.length;
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remainder > 0 && motionDom.fillOffset(times, remainder);
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/**
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* If only one value has been set, ie [1], push a null to the start of
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* the keyframe array. This will let us mark a keyframe at this point
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* that will later be hydrated with the previous value.
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*/
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valueKeyframesAsList.length === 1 &&
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valueKeyframesAsList.unshift(null);
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/**
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* Handle repeat options
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*/
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if (repeat) {
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motionUtils.invariant(repeat < MAX_REPEAT, "Repeat count too high, must be less than 20", "repeat-count-high");
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duration = calculateRepeatDuration(duration, repeat);
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const originalKeyframes = [...valueKeyframesAsList];
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const originalTimes = [...times];
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ease = Array.isArray(ease) ? [...ease] : [ease];
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const originalEase = [...ease];
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for (let repeatIndex = 0; repeatIndex < repeat; repeatIndex++) {
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valueKeyframesAsList.push(...originalKeyframes);
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for (let keyframeIndex = 0; keyframeIndex < originalKeyframes.length; keyframeIndex++) {
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times.push(originalTimes[keyframeIndex] + (repeatIndex + 1));
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ease.push(keyframeIndex === 0
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? "linear"
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: motionUtils.getEasingForSegment(originalEase, keyframeIndex - 1));
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}
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}
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normalizeTimes(times, repeat);
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}
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const targetTime = startTime + duration;
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/**
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* Add keyframes, mapping offsets to absolute time.
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*/
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addKeyframes(valueSequence, valueKeyframesAsList, ease, times, startTime, targetTime);
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maxDuration = Math.max(calculatedDelay + duration, maxDuration);
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totalDuration = Math.max(targetTime, totalDuration);
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};
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if (motionDom.isMotionValue(subject)) {
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const subjectSequence = getSubjectSequence(subject, sequences);
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resolveValueSequence(keyframes, transition, getValueSequence("default", subjectSequence));
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}
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else {
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const subjects = resolveSubjects(subject, keyframes, scope, elementCache);
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const numSubjects = subjects.length;
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/**
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* For every element in this segment, process the defined values.
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*/
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for (let subjectIndex = 0; subjectIndex < numSubjects; subjectIndex++) {
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/**
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* Cast necessary, but we know these are of this type
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*/
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keyframes = keyframes;
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transition = transition;
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const thisSubject = subjects[subjectIndex];
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const subjectSequence = getSubjectSequence(thisSubject, sequences);
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for (const key in keyframes) {
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resolveValueSequence(keyframes[key], getValueTransition(transition, key), getValueSequence(key, subjectSequence), subjectIndex, numSubjects);
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}
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}
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}
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prevTime = currentTime;
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currentTime += maxDuration;
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}
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/**
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* For every element and value combination create a new animation.
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*/
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sequences.forEach((valueSequences, element) => {
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for (const key in valueSequences) {
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const valueSequence = valueSequences[key];
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/**
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* Arrange all the keyframes in ascending time order.
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*/
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valueSequence.sort(compareByTime);
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const keyframes = [];
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const valueOffset = [];
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const valueEasing = [];
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/**
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* For each keyframe, translate absolute times into
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* relative offsets based on the total duration of the timeline.
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*/
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for (let i = 0; i < valueSequence.length; i++) {
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const { at, value, easing } = valueSequence[i];
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keyframes.push(value);
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valueOffset.push(motionUtils.progress(0, totalDuration, at));
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valueEasing.push(easing || "easeOut");
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}
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/**
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* If the first keyframe doesn't land on offset: 0
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* provide one by duplicating the initial keyframe. This ensures
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* it snaps to the first keyframe when the animation starts.
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*/
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if (valueOffset[0] !== 0) {
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valueOffset.unshift(0);
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keyframes.unshift(keyframes[0]);
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valueEasing.unshift(defaultSegmentEasing);
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}
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/**
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* If the last keyframe doesn't land on offset: 1
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* provide one with a null wildcard value. This will ensure it
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* stays static until the end of the animation.
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*/
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if (valueOffset[valueOffset.length - 1] !== 1) {
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valueOffset.push(1);
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keyframes.push(null);
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}
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if (!animationDefinitions.has(element)) {
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animationDefinitions.set(element, {
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keyframes: {},
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transition: {},
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});
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}
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const definition = animationDefinitions.get(element);
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definition.keyframes[key] = keyframes;
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definition.transition[key] = {
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...defaultTransition,
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duration: totalDuration,
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ease: valueEasing,
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times: valueOffset,
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...sequenceTransition,
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};
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}
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});
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return animationDefinitions;
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}
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function getSubjectSequence(subject, sequences) {
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!sequences.has(subject) && sequences.set(subject, {});
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return sequences.get(subject);
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}
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function getValueSequence(name, sequences) {
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if (!sequences[name])
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sequences[name] = [];
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return sequences[name];
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}
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function keyframesAsList(keyframes) {
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return Array.isArray(keyframes) ? keyframes : [keyframes];
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}
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function getValueTransition(transition, key) {
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return transition && transition[key]
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? {
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...transition,
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...transition[key],
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}
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: { ...transition };
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}
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const isNumber = (keyframe) => typeof keyframe === "number";
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const isNumberKeyframesArray = (keyframes) => keyframes.every(isNumber);
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function animateElements(elementOrSelector, keyframes, options, scope) {
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const elements = motionDom.resolveElements(elementOrSelector, scope);
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const numElements = elements.length;
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motionUtils.invariant(Boolean(numElements), "No valid elements provided.", "no-valid-elements");
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/**
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* WAAPI doesn't support interrupting animations.
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*
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* Therefore, starting animations requires a three-step process:
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* 1. Stop existing animations (write styles to DOM)
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* 2. Resolve keyframes (read styles from DOM)
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* 3. Create new animations (write styles to DOM)
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*
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* The hybrid `animate()` function uses AsyncAnimation to resolve
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* keyframes before creating new animations, which removes style
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* thrashing. Here, we have much stricter filesize constraints.
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* Therefore we do this in a synchronous way that ensures that
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* at least within `animate()` calls there is no style thrashing.
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*
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* In the motion-native-animate-mini-interrupt benchmark this
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* was 80% faster than a single loop.
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*/
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const animationDefinitions = [];
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/**
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* Step 1: Build options and stop existing animations (write)
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*/
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for (let i = 0; i < numElements; i++) {
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const element = elements[i];
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const elementTransition = { ...options };
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/**
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* Resolve stagger function if provided.
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*/
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if (typeof elementTransition.delay === "function") {
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elementTransition.delay = elementTransition.delay(i, numElements);
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}
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for (const valueName in keyframes) {
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let valueKeyframes = keyframes[valueName];
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if (!Array.isArray(valueKeyframes)) {
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valueKeyframes = [valueKeyframes];
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}
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const valueOptions = {
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...motionDom.getValueTransition(elementTransition, valueName),
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};
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valueOptions.duration && (valueOptions.duration = motionUtils.secondsToMilliseconds(valueOptions.duration));
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valueOptions.delay && (valueOptions.delay = motionUtils.secondsToMilliseconds(valueOptions.delay));
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/**
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* If there's an existing animation playing on this element then stop it
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* before creating a new one.
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*/
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const map = motionDom.getAnimationMap(element);
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const key = motionDom.animationMapKey(valueName, valueOptions.pseudoElement || "");
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const currentAnimation = map.get(key);
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currentAnimation && currentAnimation.stop();
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animationDefinitions.push({
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map,
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key,
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unresolvedKeyframes: valueKeyframes,
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options: {
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...valueOptions,
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element,
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name: valueName,
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allowFlatten: !elementTransition.type && !elementTransition.ease,
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},
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});
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}
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}
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/**
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* Step 2: Resolve keyframes (read)
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*/
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for (let i = 0; i < animationDefinitions.length; i++) {
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const { unresolvedKeyframes, options: animationOptions } = animationDefinitions[i];
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const { element, name, pseudoElement } = animationOptions;
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if (!pseudoElement && unresolvedKeyframes[0] === null) {
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unresolvedKeyframes[0] = motionDom.getComputedStyle(element, name);
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}
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motionDom.fillWildcards(unresolvedKeyframes);
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motionDom.applyPxDefaults(unresolvedKeyframes, name);
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/**
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* If we only have one keyframe, explicitly read the initial keyframe
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* from the computed style. This is to ensure consistency with WAAPI behaviour
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* for restarting animations, for instance .play() after finish, when it
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* has one vs two keyframes.
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*/
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if (!pseudoElement && unresolvedKeyframes.length < 2) {
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unresolvedKeyframes.unshift(motionDom.getComputedStyle(element, name));
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}
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animationOptions.keyframes = unresolvedKeyframes;
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}
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/**
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* Step 3: Create new animations (write)
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*/
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const animations = [];
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for (let i = 0; i < animationDefinitions.length; i++) {
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const { map, key, options: animationOptions } = animationDefinitions[i];
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const animation = new motionDom.NativeAnimation(animationOptions);
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map.set(key, animation);
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animation.finished.finally(() => map.delete(key));
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animations.push(animation);
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}
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return animations;
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}
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function animateSequence(definition, options) {
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const animations = [];
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createAnimationsFromSequence(definition, options).forEach(({ keyframes, transition }, element) => {
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animations.push(...animateElements(element, keyframes, transition));
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});
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return new motionDom.GroupAnimationWithThen(animations);
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}
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const createScopedWaapiAnimate = (scope) => {
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function scopedAnimate(elementOrSelector, keyframes, options) {
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return new motionDom.GroupAnimationWithThen(animateElements(elementOrSelector, keyframes, options, scope));
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}
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return scopedAnimate;
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};
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const animateMini = /*@__PURE__*/ createScopedWaapiAnimate();
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exports.animate = animateMini;
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exports.animateSequence = animateSequence;
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