115 lines
3.1 KiB
TypeScript
115 lines
3.1 KiB
TypeScript
let mainfig: HTMLElement;
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let mainimg: HTMLImageElement;
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let mainlink: HTMLAnchorElement;
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let altButtons: HTMLInputElement[];
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let skipAll: HTMLInputElement;
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let opened = new Set;
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function openCW(id: string | null, caption: HTMLElement | null,
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focusLink = false) {
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if (id !== null) opened.add(id);
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if (caption !== null) 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(id: string | null,
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caption: HTMLElement | null) {
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if (caption) {
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caption.addEventListener('click', _e => openCW(id, caption));
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caption.addEventListener('keyup',
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e => { if (e.key == 'Enter') openCW(id, caption, true) });
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}
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}
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function setImage(id: string | null,
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src: string,
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href: string,
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cw: string) {
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let caption = document.getElementById('cw');
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let newCaption: HTMLElement | null = null;
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let checked = skipAll ? skipAll.checked : false;
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if (!checked && !opened.has(id) && cw) {
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let template = document.getElementById('cw-template') as HTMLTemplateElement;
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newCaption = template.content.firstElementChild!.cloneNode(true) as HTMLElement;
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newCaption.querySelector('#cw-text')!.innerHTML = cw;
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addCWListeners(id, newCaption);
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}
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if (caption) {
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openCW(null, caption);
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}
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if (newCaption !== null) {
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mainfig.insertBefore(newCaption, 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: HTMLInputElement,
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doPush = true) {
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setImage(button.id, button.value,
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button.dataset.link!,
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button.dataset.warning!);
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if (doPush) history.pushState(null, '', '#' + button.id);
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}
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function useFragment(firstLoad = false) {
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let button = altButtons[0];
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let frag = decodeURIComponent(location.hash).replace(/^#/, '');
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if (frag) {
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let selected = document.getElementById(frag) as HTMLInputElement;
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if (selected) button = selected;
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}
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let id: string | null = null;
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if (button) {
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id = button.id;
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button.checked = true;
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activateButton(button, false);
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}
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if (firstLoad) addCWListeners(id, document.getElementById('cw'));
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}
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function setup() {
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mainfig = document.getElementById('mainfig')!;
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mainimg = document.getElementById('mainimg') as HTMLImageElement;
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mainlink = document.getElementById('mainlink') as HTMLAnchorElement;
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skipAll = document.getElementById('skipAll') as HTMLInputElement;
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let alts = document.getElementById('alts');
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if (alts) {
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let inputs = Array.from(alts.getElementsByTagName('input'));
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altButtons = inputs.filter(e => e.name == 'variant');
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} else {
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altButtons = [];
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}
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for (let button of altButtons) {
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button.onchange = _e => { if (button.checked) activateButton(button); };
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}
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if (skipAll) {
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skipAll.onchange = _e => { if (skipAll.checked) {
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let caption = document.getElementById('cw');
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if (caption) { openCW(null, caption, false); }
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} };
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}
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window.addEventListener('popstate', _e => useFragment());
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useFragment(true);
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}
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window.addEventListener('DOMContentLoaded', setup);
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export {};
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