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function intersect(a, b) {
if (b.length > a.length) { [a, b] = [b, a]; } // loop over shorter array
return a.filter(item => (b.indexOf(item) !== -1));
}
function insertAfter(newNode, referenceNode) {
referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}
function moveAll(fromNode, toNode) {
for (let c; (c = fromNode.firstChild) != null; ) { toNode.appendChild(c); }
}
function removeAllFrom(fromNode) {
for (let c; (c = fromNode.lastChild) != null; ) { fromNode.removeChild(c); }
}
function turnIntoCts(node, makeNodeCallback) {
node.onclick = function(e){
e.preventDefault();
let newNode = makeNodeCallback();
if(newNode !== node) {
removeAllFrom(node);
moveAll(newNode, node);
node.className = newNode.className;
} else {
node.onclick = '';
node.classList.remove('cts');
}
};
}
function makeCts(makeNodeCallback, title) {
let ctsNode = document.createElement('div');
let placeholder = document.createElement('div');
placeholder.className = 'placeholder';
placeholder.innerHTML = title;
ctsNode.className = 'cts';
ctsNode.appendChild(placeholder);
turnIntoCts(ctsNode, makeNodeCallback);
return ctsNode;
}
function naiveEllipsis(str, len, ellStr='...') {
let ellLen = ellStr.length;
if (str.length <= len) { return str; }
let half = Math.floor((len - ellLen) / 2);
let left = str.substring(0, half);
let right = str.substring(str.length - (len - half - ellLen));
return '' + left + ellStr + right;
}
function wrapIntoTag(node, tagName, className) {
let tag = document.createElement(tagName);
if (className !== undefined) { tag.className = className; }
tag.appendChild(node);
return tag;
}
function getEmbedableLinkTypes() {
return [
{
name: 'Jpeg and png images',
id: 'embed_jpeg_and_png_images',
ctsDefault: false,
re: /\.(jpeg|jpg|png|svg)(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let aNode2 = document.createElement('a');
let imgNode = document.createElement('img');
imgNode.src = aNode.href;
aNode2.href = aNode.href;
aNode2.appendChild(imgNode);
return wrapIntoTag(aNode2, 'div');
}
},
{
name: 'Gif images',
id: 'embed_gif_images',
ctsDefault: true,
re: /\.gif(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let aNode2 = document.createElement('a');
let imgNode = document.createElement('img');
imgNode.src = aNode.href;
aNode2.href = aNode.href;
aNode2.appendChild(imgNode);
return wrapIntoTag(aNode2, 'div');
}
}
]
}
function embedLink(aNode, linkTypes, container, alwaysCts, afterNode) {
let anyEmbed = false;
let linkId = (aNode.href.replace(/^https?:/i, '').replace(/\'/i,''));
let sameEmbed = container.querySelector('*[data-linkid=\'' + linkId + '\']'); // do not embed the same thing twice
if (sameEmbed === null) {
anyEmbed = [].some.call(linkTypes, function(linkType) {
/* if (GM_getValue(linkType.id, true)) { TODO user embed particular link type setting */
let reResult = linkType.re.exec(aNode.href);
if (reResult !== null) {
if ((linkType.match !== undefined) && (linkType.match(aNode, reResult) === false)) { return false; }
let newNode;
let isCts = alwaysCts /* || TODO user click-to-show setting */;
if (isCts) {
let linkTitle = (linkType.makeTitle !== undefined) ? linkType.makeTitle(aNode, reResult) : naiveEllipsis(aNode.href, 55);
newNode = makeCts(() => linkType.makeNode(aNode, reResult, newNode), 'Click to show: ' + linkTitle);
} else {
newNode = linkType.makeNode(aNode, reResult);
}
if (!newNode) { return false; }
aNode.classList.add('embedLink');
/*
if (GM_getValue('enable_link_text_update', true) && (linkType.linkTextUpdate !== undefined)) {
linkType.linkTextUpdate(aNode, reResult);
}
*/
newNode.setAttribute('data-linkid', linkId);
if (afterNode !== undefined) {
insertAfter(newNode, afterNode);
} else {
container.appendChild(newNode);
}
//setHighlightOnHover(aNode, newNode);
return true;
}
/* } */
});
}
return anyEmbed;
}
function embedLinks(aNodes, container, alwaysCts, afterNode) {
let anyEmbed = false;
let embedableLinkTypes = getEmbedableLinkTypes();
Array.from(aNodes).forEach(aNode => {
let isEmbedded = embedLink(aNode, embedableLinkTypes, container, alwaysCts, afterNode);
anyEmbed = anyEmbed || isEmbedded;
});
return anyEmbed;
}
function articleInfo(article) {
let userId = article.querySelector('div.msg-avatar > a > img').alt;
let tagNodes = article.querySelectorAll('.msg-tags > *');
let tags = Array.from(tagNodes).map(d => d.textContent.toLowerCase());
return { userId: userId, tags: tags };
}
function isFilteredX(x, filteredUsers, filteredTags) {
let {userId, tags} = articleInfo(x);
return (filteredUsers !== undefined && filteredUsers.indexOf(userId.toLowerCase()) !== -1)
|| (intersect(tags, filteredTags).length > 0);
}
function embedLinksToX(x, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags) {
let isCtsPost = isFilteredX(x, ctsUsers, ctsTags);
let allLinks = x.querySelectorAll(allLinksSelector);
let embedContainer = document.createElement('div');
embedContainer.className = 'embedContainer';
let anyEmbed = embedLinks(allLinks, embedContainer, isCtsPost);
if (anyEmbed) {
let beforeNode = x.querySelector(beforeNodeSelector);
x.insertBefore(embedContainer, beforeNode);
}
}
function embedLinksToArticles() {
let ctsUsers = [], ctsTags = [] // TODO click-to-show users and tags
let beforeNodeSelector = 'nav.l';
let allLinksSelector = 'p:not(.ir) a, pre a';
Array.from(document.querySelectorAll('#content > article')).forEach(article => {
embedLinksToX(article, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags);
});
}
function embedLinksToPost() {
let ctsUsers = [], ctsTags = [] // TODO click-to-show users and tags
let beforeNodeSelector = '.msg-txt + *';
let allLinksSelector = '.msg-txt a';
Array.from(document.querySelectorAll('#content .msg-cont')).forEach(msg => {
embedLinksToX(msg, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags);
});
}
exports.embed = function() {
if (document.querySelectorAll('#content > article').length) {
embedLinksToArticles();
} else {
embedLinksToPost();
}
}
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