63 lines
1.5 KiB
JavaScript
63 lines
1.5 KiB
JavaScript
(function() {
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'use strict';
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function getById(id) { return document.getElementById(id); }
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let mainfig = getById('mainfig');
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let mainimg = getById('mainimg');
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let mainlink = getById('mainlink');
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function openCW(caption, focusLink) {
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mainfig.removeChild(caption);
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mainlink.tabIndex = 0;
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if (focusLink) mainlink.focus();
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}
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function addCWListeners(caption) {
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if (caption) {
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caption.addEventListener('click', e => openCW(caption));
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caption.addEventListener('keyup',
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e => { if (e.key == 'Enter') openCW(caption, true) });
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}
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}
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function setImage(src, href, cw) {
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let caption = getById('cw');
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let cwText = `<span id=cw-text>cw: <b>${cw}</b></span>`;
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if (cw && caption) {
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caption.innerHTML = cwText;
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} else if (caption) {
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openCW(caption);
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} else if (cw) {
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let template = document.createElement('template');
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template.innerHTML = `
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<figcaption id=cw aria-role=button tabindex=0>
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${cwText}
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</figcaption>`;
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let content = template.content;
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addCWListeners(content.getElementById('cw'));
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mainfig.insertBefore(content, mainlink);
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mainlink.tabIndex = -1;
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}
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mainimg.src = src;
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mainlink.href = href;
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}
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function activateButton(button) {
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setImage(button.value, button.dataset.link, button.dataset.warning);
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}
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function setup() {
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for (let button of document.querySelectorAll('#alts input')) {
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button.onchange = e => { if (button.checked) activateButton(button); };
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}
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addCWListeners(getById('cw'));
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}
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window.addEventListener('load', setup);
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})();
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