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Tumblr Dashboard - clickable links to images and post timestamps

Linkifies all images in the tumblr dashboard stream. The script also displays the timestamp of each post in the upper right corner.

当前为 2018-10-25 提交的版本，查看 最新版本。

// ==UserScript==
// @name         Tumblr Dashboard - clickable links to images and post timestamps
// @namespace    tumblr_dashboard_linkify
// @version      1.1.0
// @license      GNU AGPLv3
// @description  Linkifies all images in the tumblr dashboard stream. The script also displays the timestamp of each post in the upper right corner.
// @author       marp
// @homepageURL  https://greasyfork.org/en/users/204542-marp
// @include      https://www.tumblr.com/dashboard
// @include      https://www.tumblr.com/dashboard/*
// @include      https://www.tumblr.com/likes
// @include      https://www.tumblr.com/likes/*
// @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;
  var parentnode;
  var newnode;

  matches=myDoc.evaluate("//div[contains(@class,'post_content')]//img[contains(@class,'post_media_photo') and (contains(@src,'.jpg') or contains(@src,'.png') or contains(@src,'.gif'))] | " +
                         "//div[contains(@class,'post_content')]//figure[contains(@class,'tmblr-full')]/img[contains(@src,'.jpg') or contains(@src,'.png') or contains(@src,'.gif')] | " +
                         "//div[contains(@class,'post_content')]//a[contains(@class,'photoset_photo')]/img[contains(@src,'.jpg') or contains(@src,'.png') or contains(@src,'.gif')]", 
                         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=getHighResImageURL(el.getAttribute("src"), false);
//        console.info("highresurl: ", tmpstr);
        parentnode=el.parentNode;
//        console.info("parentnode: ", parentnode);
        if (parentnode.nodeName.toLowerCase() == "a") {
          if (parentnode.hasAttribute("class") &&
              (parentnode.getAttribute("class").indexOf("post_media_photo") >= 0 ||
               parentnode.getAttribute("class").indexOf("photoset_photo") >= 0) ) {
//            console.info("set parentnode href: ", tmpstr);
            parentnode.setAttribute("href", tmpstr); 
          }
          // if it is a link type but with other style classes -> do nothing
        } else {
          newnode = document.createElement("a");
          newnode.setAttribute("href", tmpstr);
          newnode.setAttribute("target", "_blank");
//          console.info("newnode href: ", tmpstr);
          parentnode.replaceChild(newnode, el);
          newnode.appendChild(el);
//          console.info("new child of this parent: ", parentnode);
        } 
      } catch (e) { console.warn("error: ", e) }
    }
	}
}


function displayDateTime(myDoc, myContext) {
  if (myDoc===null) myDoc= myContext;
  if (myDoc===null) return;
  if (myContext===null) myContext= myDoc;
  
  var matches;
  var tmpstr;
  var elements;
  var headernode;
  var linknode;
  var pos;
  var newnode;
  var newnode2;

  matches=myDoc.evaluate("//div[contains(@class,'post_wrapper')]", 
                         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);
        elements = el.getElementsByClassName("post_header");
        if (elements.length <= 0) continue;
        headernode = elements[0];
        elements = el.getElementsByClassName("post_permalink");
        if (elements.length <= 0) continue;
        linknode = elements[0];
        if (!linknode.hasAttribute("title")) continue;
        tmpstr = linknode.getAttribute("title");
        pos = tmpstr.indexOf(" - ");
        if (pos >= 0) {
          tmpstr = tmpstr.substr(pos+3);
        }
        newnode = document.createElement("div");
        newnode.setAttribute("class", "post_source");
        newnode2 = document.createElement("div");
//        newnode2.setAttribute("class", "post_source_app");
        newnode2.setAttribute("style", "float: right; text-overflow: ellipsis; overflow: hidden;");
        newnode2.textContent = tmpstr;
        newnode.appendChild(newnode2);
        elements = headernode.getElementsByClassName("post_source");
        if (elements.length <= 0) {
          headernode.appendChild(newnode);
        } else {
          headernode.replaceChild(newnode, elements[0]);
        }
      } catch (e) { console.warn("error: ", e) }
    }
	}
}


// 2018-08-09 - RAW (original upload) images do not seem to be working anymore
function getHighResImageURL(imageurl, isgetraw) {
  var result = imageurl;
  var tmplen = imageurl.length;
  var pos;
  if ((imageurl.toLowerCase().lastIndexOf(".jpg") == tmplen-4) ||
      (imageurl.toLowerCase().lastIndexOf(".png") == tmplen-4)) {
    if (isgetraw) {
      result = "https://s3.amazonaws.com/data" + 
               imageurl.slice(imageurl.indexOf(".tumblr.com/"), imageurl.lastIndexOf("_")) + 
               "_raw" + 
               imageurl.substring(imageurl.lastIndexOf("."));
    } else {
	    result = imageurl.replace("_250.","_1280.").replace("_400.","_1280.").replace("_500.","_1280.").replace("_540.","_1280.").replace("_640.","_1280.");
    }
  } 
  else if ((imageurl.toLowerCase().lastIndexOf(".gif") == tmplen-4)) {
    if (isgetraw) {
      result = "https://s3.amazonaws.com/data" + 
               imageurl.slice(imageurl.indexOf(".tumblr.com/"), imageurl.lastIndexOf("_")) + 
               "_raw" + 
               imageurl.substring(imageurl.lastIndexOf("."));
    } else {
	    result = imageurl.replace("_250.","_540.").replace("_400.","_540.").replace("_500.","_540.");
    }
  }
  return result;
}


// 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);
      displayDateTime(document, postsnode);
    });
  });    
});
 
// 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='posts']", 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);
displayDateTime(document, postsnode);

//start the observer for new nodes
observer.observe(postsnode, config);