118 lines
4 KiB
JavaScript
118 lines
4 KiB
JavaScript
// Checks if the user enabled prefers-reduced-motion
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const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
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// Dictionary to keep track of animation intervals
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let animationIntervals = {};
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// Dictionary to keep track of delay count for each animation
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let delays = {};
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// Dictionary to keep track of frame for each animation
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let frames = {};
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// dictionary to keep track of frame count for each animation
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let frameCounts = {};
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const illustrationAccueil = document.getElementById('illustration-accueil');
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const rennes = document.getElementById('rennes');
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const orsay = document.getElementById('orsay');
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const parterre = document.getElementById('parterre');
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// Update ARIA live attributes based on prefers-reduced-motion
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function updateARIALiveAttributes() {
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if (prefersReducedMotion) {
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illustrationAccueil.setAttribute('aria-live', 'off');
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rennes.setAttribute('aria-live', 'off');
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orsay.setAttribute('aria-live', 'off');
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parterre.setAttribute('aria-live', 'off');
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} else {
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illustrationAccueil.setAttribute('aria-live', 'polite');
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rennes.setAttribute('aria-live', 'polite');
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orsay.setAttribute('aria-live', 'polite');
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parterre.setAttribute('aria-live', 'polite');
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}
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}
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function animate(id, delay) {
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// get the container and frames for the amination
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const container = document.getElementById(id);
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const framesList = container.children;
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// set up the frame counter
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frameCounts[id] = 0;
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// hide all frames except for the first
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framesList[0].style.display = "flex";
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for (let i = 1; i < framesList.length; i++) {
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framesList[i].style.display = "none";
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}
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// Stock frames and delay in dictionaries
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frames[id] = framesList;
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delays[id] = delay;
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// Update ARIA live attributes
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updateARIALiveAttributes();
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// Start the animation if prefers-reduced-motion is not enabled
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if (!prefersReducedMotion) {
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animationIntervals[id] = setInterval(updateAnimation, delay, id, framesList, framesList.length);
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}
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}
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function updateAnimation(id, framesList, totalFrames) {
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// increment the frame counter for the given id
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frameCounts[id] = (frameCounts[id] + 1) % totalFrames;
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// show the next frame
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framesList[frameCounts[id]].style.display = "flex";
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// hide the previous frame
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if (frameCounts[id] === 0) {
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framesList[totalFrames - 1].style.display = "none";
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} else {
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framesList[frameCounts[id] - 1].style.display = "none";
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}
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}
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animate("illustration-accueil", 500);
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animate("rennes", 1000);
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animate("orsay", 2000);
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animate("parterre", 1500);
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document.addEventListener('DOMContentLoaded', function() {
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const toggleableElements = document.querySelectorAll('.toggleable, .img_top_toggleable');
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toggleableElements.forEach(function(element) {
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element.addEventListener('click', function() {
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toggleAnimation();
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});
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});
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});
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function toggleAnimation() {
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const toggleable = document.querySelector('.toggleable');
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const imgTopToggleable = document.querySelector('.img_top_toggleable');
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// Play the animations
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if (toggleable.style.display === 'none') {
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illustrationAccueil.setAttribute('aria-live', 'polite');
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rennes.setAttribute('aria-live', 'polite');
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orsay.setAttribute('aria-live', 'polite');
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parterre.setAttribute('aria-live', 'polite');
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toggleable.style.display = 'block';
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imgTopToggleable.style.display = 'none';
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Object.keys(animationIntervals).forEach(id => {
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animationIntervals[id] = setInterval(updateAnimation, delays[id], id, frames[id], frames[id].length);
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});
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} else { // Pause the animations
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illustrationAccueil.setAttribute('aria-live', 'off');
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rennes.setAttribute('aria-live', 'off');
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orsay.setAttribute('aria-live', 'off');
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parterre.setAttribute('aria-live', 'off');
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toggleable.style.display = 'none';
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imgTopToggleable.style.display = 'block';
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Object.keys(animationIntervals).forEach(id => {
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clearInterval(animationIntervals[id]);
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});
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}
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}
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