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refactor single.js a bit

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This commit is contained in:
Rhiannon Morris 2020-08-03 19:38:14 +02:00
parent d2b2fdf2a5
commit c2a0ca6680
1 changed files with 41 additions and 39 deletions
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80
script/single.js
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@ -1,58 +1,60 @@
'use strict';
(function() {
function defined(x) {
return x !== null && typeof x !== 'undefined';
}
'use strict';
function getById(id) { return document.getElementById(id); }
function setImage(src, href, cw) {
let mainfig = getById('mainfig');
let mainimg = getById('mainimg');
let mainlink = getById('mainlink');
let caption = getById('cw');
let mainfig = getById('mainfig');
let mainimg = getById('mainimg');
let mainlink = getById('mainlink');
if (defined(caption) && defined(cw)) {
caption.innerHTML = `<span id=cw-text>cw: <b>${cw}</b></span>`;
} else if (defined(caption)) {
mainfig.removeChild(caption);
} else if (defined(cw)) {
let newCaption = document.createElement('figcaption');
newCaption.id = 'cw';
newCaption.innerHTML = `<span id=cw-text>cw: <b>${cw}</b></span>`;
newCaption.onclick = openCW;
mainfig.insertBefore(newCaption, mainlink);
function openCW(caption, focusLink) {
mainfig.removeChild(caption);
mainlink.tabIndex = 0;
if (focusLink) mainlink.focus();
}
function addCWListeners(caption) {
if (caption) {
caption.addEventListener('click', e => openCW(caption));
caption.addEventListener('keyup',
e => { if (e.key == 'Enter') openCW(caption, true) });
}
}
function setImage(src, href, cw) {
let caption = getById('cw');
let cwText = `<span id=cw-text>cw: <b>${cw}</b></span>`;
if (cw && caption) {
caption.innerHTML = cwText;
} else if (caption) {
openCW(caption);
} else if (cw) {
let template = document.createElement('template');
template.innerHTML = `
<figcaption id=cw aria-role=button tabindex=0>
${cwText}
</figcaption>`;
let content = template.content;
addCWListeners(content.getElementById('cw'));
mainfig.insertBefore(content, mainlink);
mainlink.tabIndex = -1;
}
mainimg.src = src;
mainlink.href= href;
mainimg.src = src;
mainlink.href = href;
}
function activateButton(button) {
setImage(button.value, button.dataset.link, button.dataset.warning);
}
function openCW() {
let mainfig = getById('mainfig');
let caption = getById('cw');
if (defined(caption)) {
mainfig.removeChild(caption);
}
}
function setup() {
for (let button of document.querySelectorAll('#altlist input')) {
button.onchange = function(e) {
if (button.checked) activateButton(button);
};
for (let button of document.querySelectorAll('#alts input')) {
button.onchange = e => { if (button.checked) activateButton(button); };
}
let caption = getById('cw');
if (defined(caption)) {
caption.onclick = openCW;
}
addCWListeners(getById('cw'));
}
window.addEventListener('load', setup);