Preview to the top comments on Reddit
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// ==UserScript==
// @name Reddit - Top Comments Preview
// @namespace https://gf.qytechs.cn/users/5174-jesuis-unparaplus
// @author Erik Wannebo, gavin19, jesuis-unparaplus
// @description Preview to the top comments on Reddit
// @include http://*.reddit.com/*
// @exclude http://*.reddit.com/*/comments/*
// @include https://*.reddit.com/*
// @exclude https://*.reddit.com/*/comments/*
// @grant none
// @version 1.53
// ==/UserScript==
(function () {
'use strict';
var topCP = {
opts: {
/* Number of comments to display. Default is 3 */
topComments: 3,
/* click or hover. Do you want to hover the link to trigger it, or click? */
eventType: 'click'
},
addTopLinks: function () {
var i, len, link, articleID, tmp,
a = document.querySelectorAll('.linklisting .comments:not(.empty)');
if (a.length) {
for (i = 0, len = a.length; i < len; i += 1) {
if (!a[i].parentNode.querySelector('.toplink') && /[0-9]/.test(a[i])) {
articleID = a[i].getAttribute('href');
articleID = articleID.substring(articleID.indexOf('/comments/') + 10, articleID.indexOf('/comments/') + 16);
link = document.createElement('a');
link.className = 'toplink';
tmp = "java";
link.href = tmp + 'script:;';
link.setAttribute('id', 'toplink' + articleID);
link.setAttribute('style', 'color:orangered;text-decoration:none;');
link.textContent = ' top';
a[i].parentNode.parentNode.querySelector('.first').insertBefore(link, null);
topCP.addListener(link, articleID);
}
}
}
},
addListener: function (link, id) {
link.addEventListener(topCP.opts.eventType, function () {
topCP.retrieveTopComments(this, id);
});
},
retrieveTopComments: function (ele, articleID) {
var pre, url, xhr, thisPre;
topCP.kill_preview = function () { this.parentNode.removeChild(this); }
ele = ele.parentNode.parentNode;
if (!document.querySelector('#preview' + articleID)) {
pre = document.createElement('div');
pre.setAttribute('id', 'preview' + articleID);
pre.classList.add('loading');
pre.addEventListener('click', topCP.kill_preview);
ele.querySelector('.first').insertBefore(pre, null);
url = window.location.href.split("/")[0]+'//www.reddit.com/comments/' + articleID + '/.json?limit=' + (topCP.opts.topComments + 5) + '&sort=top';
xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.onreadystatechange = function () {
if (xhr.readyState === 4 && xhr.status === 200) {
topCP.onloadJSON(xhr);
}
};
xhr.send(null);
} else {
thisPre = document.querySelector('#preview' + articleID);
thisPre.parentNode.parentNode.style.marginBottom = '';
thisPre.parentNode.removeChild(thisPre);
}
},
onloadJSON: function (response) {
var i, len, content, ups, downs, contentDiv, article, author, permalink,
newHTML = '',
comments = JSON.parse(response.responseText),
commentsLength = comments[1].data.children.length,
articleID = comments[0].data.children[0].data.id,
threadLink = comments[0].data.children[0].data.permalink;
len = topCP.opts.topComments < commentsLength ? topCP.opts.topComments : commentsLength;
for (i = 0; i < len; i += 1) {
content = comments[1].data.children[i].data.body_html;
if (content) {
contentDiv = document.createElement('div');
contentDiv.innerHTML = content;
content = contentDiv.firstChild.textContent;
author = comments[1].data.children[i].data.author;
ups = comments[1].data.children[i].data.ups;
permalink = threadLink + comments[1].data.children[i].data.id;
newHTML += (i > 0 ? '<hr>' : '');
newHTML += '<a class="authorLink" target="_blank" href="/u/' + author;
newHTML += '">' + author + '</a> ';
newHTML += '(+' + ups + ')';
newHTML += '<a href="' + permalink + '" target="_blank" class="perma">permalink</a>';
newHTML += '<br />' + content;
}
}
article = document.querySelector('#preview' + articleID);
article.classList.remove('loading');
article.innerHTML = newHTML;
article.parentNode.parentNode.style.marginBottom = (article.offsetHeight + 5) + 'px';
article.removeEventListener('click', topCP.kill_preview);
},
addStyle: function () {
var style,
sheet = '';
sheet += "div[id^=preview]{color:#888;box-sizing:border-box;-moz-box-sizing:border-box;background:rgba(245,245,250,.9);border-radius:5px;border:1px solid #000;box-shadow:1px 1px 1px #000;white-space:normal;padding:5px;position:absolute;margin-top: 2px;}";
sheet += ".loading:before{content:\"Loading...\";}div[id^=preview] .md{border:1px solid #000;box-shadow:1px 1px 1px #000;background:rgba(225,226,227,.9);box-sizing:border-box;-moz-box-sizing:border-box;margin:3px;padding:2px 8px;}";
sheet += "div[id^=preview] .md a{font-weight:bold;text-decoration:underline;color:#4D9AE7!important;}";
sheet += "div[id^=preview] .md{background-color:#CCC!important;}";
sheet += "div[id^=preview] .md p{color:#222;}";
sheet += "div[id^=preview] .authorLink{color:#888!important;}";
sheet += ".listing-page .linklisting .buttons li { vertical-align: top; }";
sheet += ".perma {float:right;color:#888!important;}";
style = document.createElement('style');
style.type = 'text/css';
style.textContent = sheet;
document.querySelector('head').appendChild(style);
},
init: function () {
document.body.addEventListener('DOMNodeInserted', function (e) {
if ((e.target.tagName === 'DIV') && (e.target.getAttribute('id') && e.target.getAttribute('id').indexOf('siteTable') !== -1)) {
topCP.addTopLinks();
}
}, true);
topCP.addStyle();
topCP.addTopLinks();
}
};
if (document.body) {
setTimeout(function () {
topCP.init();
}, 300);
} else {
window.addEventListener('load', function () {
topCP.init();
}, false);
}
}());
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