Fixes issues with reddit image previews. Specifically, clicking image preview now links directly to image (instead of thread) and fits height of image previews in carousel so they don't get clipped out.
当前为
// ==UserScript==
// @name Better Reddit Image Previews
// @namespace https://lawrenzo.com/p/better-reddit-image-previews
// @version 0.3.1
// @description Fixes issues with reddit image previews. Specifically, clicking image preview now links directly to image (instead of thread) and fits height of image previews in carousel so they don't get clipped out.
// @author Lawrence Sim
// @license WTFPL (http://www.wtfpl.net)
// @grant none
// @match *://*.reddit.com/*
// ==/UserScript==
'use strict';
(function() {
function fixImage(img, fixHeight) {
if(!img || img.getAttribute("ifix")) return;
if(fixHeight) {
img.style.height = "100%";
img.parentElement.style.height = "100%";
}
img.addEventListener("click", evt => {
window.open(img.getAttribute("src").replace("preview.redd.it", "i.redd.it"));
evt.stopPropagation();
evt.preventDefault();
});
img.setAttribute("ifix", 1);
}
var feedWatcher = null,
postWatcher = null,
galleryWatcher = null;
function processNodes(nodes) {
nodes.forEach(node => {
node.querySelectorAll("div[data-testid='post-container']")
.forEach(post => {
if(post.getAttribute("ifix")) return;
let postbg = post.querySelector("[data-click-id='background']");
if(postbg) postWatcher.observe(postbg, {childList:true});
post.setAttribute("ifix", 1);
});
});
}
function resetFeedWatcher(feedWrapper) {
if(feedWatcher) feedWatcher.disconnect();
feedWatcher = new MutationObserver(mutated => {
mutated.forEach(mutant => processNodes(mutant.addedNodes))
});
feedWatcher.observe(feedWrapper, {childList:true});
}
function resetPostWatcher() {
if(postWatcher) postWatcher.disconnect();
postWatcher = new MutationObserver(mutated => {
mutated[0].addedNodes.forEach(node => {
if(!node.querySelectorAll) return
node.querySelectorAll("img[alt='Post image']")
.forEach(img => fixImage(img));
let gallery = node.querySelector("ul");
if(gallery) {
galleryWatcher.observe(gallery, {childList: true, subtree:true});
gallery.querySelectorAll("li figure img")
.forEach(img => fixImage(img, true));
}
});
});
}
function resetGalleryWatcher() {
if(galleryWatcher) galleryWatcher.disconnect();
galleryWatcher = new MutationObserver(mutated => {
mutated.forEach(mutant => {
mutant.addedNodes.forEach(node => node.nodeName == "IMG" && fixImage(node, true));
});
});
}
function getFeedWrapper() {
let listingLayout = document.querySelector(".ListingLayout-outerContainer"),
firstPost = listingLayout && listingLayout.querySelector("div[data-testid='post-container']"),
feedWrapper = firstPost && firstPost.parentNode;
while(feedWrapper && !feedWrapper.nextSibling) {
if(feedWrapper == listingLayout) return null;
feedWrapper = feedWrapper.parentNode || null;
}
return feedWrapper && feedWrapper.parentNode;
}
var lastFeedWrapper = null;
(new MutationObserver(() => {
let feedWrapper = getFeedWrapper();
if(feedWrapper && feedWrapper !== lastFeedWrapper) {
resetGalleryWatcher();
resetPostWatcher();
processNodes([feedWrapper]);
resetFeedWatcher(feedWrapper);
lastFeedWrapper = feedWrapper;
}
})).observe(document.body, {childList:true, subtree:true});
})();