Linkifies all images in the Twitter Home stream. These links point to the :orig version while the stream content is modified to use the :small variant to increase performance.
当前为
// ==UserScript==
// @name Twitter Home - clickable links to images
// @namespace twitter_home_linkify
// @version 1.0.0
// @license GNU AGPLv3
// @description Linkifies all images in the Twitter Home stream. These links point to the :orig version while the stream content is modified to use the :small variant to increase performance.
// @author marp
// @homepageURL https://greasyfork.org/en/users/204542-marp
// @include https://twitter.com/
// @include https://twitter.com/*
// @include https://pbs.twimg.com/media/*
// @exclude https://twitter.com/settings
// @exclude https://twitter.com/settings/*
// @run-at document-end
// ==/UserScript==
function createImageLinks(myDoc, myContext) {
//console.info("createImageLinks: ", myContext);
if (myDoc===null) myDoc= myContext;
if (myDoc===null) return;
if (myContext===null) myContext= myDoc;
var matches;
var tmpstr;
matches=myDoc.evaluate("//div[contains(@class,'AdaptiveMedia-photoContainer')]/img",
myContext, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
for(var i=0, el; (i<matches.snapshotLength); i++) {
el=matches.snapshotItem(i);
if (el) {
try {
// console.info("matched-element: ", el);
tmpstr=getCleanImageURL(el.getAttribute("src"), false);
// console.info("cleanurl: ", tmpstr);
// only need ":small" variant for tream/thumbnail display (save bandwidth and increase performance)
el.setAttribute("src", tmpstr+":small");
// create dorect link to ":orig" image - best way to access by opening in new tab via "middle-click")
insertLinkElement(myDoc, el, tmpstr+":orig", getFilename(tmpstr));
} catch (e) { console.warn("error: ", e); }
}
}
}
function insertLinkElement(myDoc, wrapElement, linkTarget, downloadName) {
var newnode;
var parentnode;
newnode = myDoc.createElement("a");
newnode.setAttribute("href", linkTarget);
newnode.setAttribute("target", "_blank");
newnode.setAttribute("download", downloadName);
parentnode = wrapElement.parentNode;
parentnode.replaceChild(newnode, wrapElement);
newnode.appendChild(wrapElement);
}
function getCleanImageURL(imageurl) {
var pos;
var pos2;
pos = imageurl.toLowerCase().lastIndexOf(":");
pos2 = imageurl.toLowerCase().indexOf("/");
if (pos >= 0 && pos > pos2) {
return imageurl.substring(0, pos);
} else {
return imageurl;
}
}
function getFilename(imageurl) {
return getCleanImageURL(imageurl).substring(imageurl.toLowerCase().lastIndexOf("/")+1);
}
// Two very different actions depending on if this is on twitter.com or twing.com
if (window.location.href.includes('pbs.twimg.com/media')){
var image;
var url;
image = document.querySelector('img');
url = image.src;
insertLinkElement(document, image, getCleanImageURL(url)+":orig", getFilename(url));
}
else
{
// create an observer instance and iterate through each individual new node
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
mutation.addedNodes.forEach(function(addedNode) {
createImageLinks(mutation.target.ownerDocument, addedNode);
});
});
});
// configuration of the observer
// NOTE: subtree is false as the wanted nodes are direct children of <ol id="posts"> -> notable performance improvement
var config = { attributes: false, childList: true, characterData: false, subtree: false };
// pass in the target node (<ol> element contains all dashboard posts), as well as the observer options
var postsmatch = document.evaluate("//ol[@id='stream-items-id']", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
//console.info("postsmatch: ", postsmatch);
var postsnode = postsmatch.singleNodeValue;
//console.info("postsnode: ", postsnode);
//process already loaded nodes (the initial posts before scrolling down for the first time)
createImageLinks(document, postsnode);
//start the observer for new nodes
observer.observe(postsnode, config);
}