From 7b532fd83c62d6862dc03375ef717418e509b52a Mon Sep 17 00:00:00 2001
From: "Elf M. Sternberg" <elf.sternberg@gmail.com>
Date: Sat, 20 Feb 2016 11:56:28 -0800
Subject: [PATCH] [feat] Detects multiple instances.  Re-detects every second. 
 Warning moved.

This allows the user to enjoy "infinite scroll" without worrying
about future script injections.  It moves the warning to next-to the
"reblog" button, so you get a clearer picture of what you're up against.
It also no longer interferes with the reblog iframe, so you still get
full interactivity.
---
 tumblr-evil-detector.js | 47 +++++++++++++++++++++++++++++++++++------
 1 file changed, 40 insertions(+), 7 deletions(-)

diff --git a/tumblr-evil-detector.js b/tumblr-evil-detector.js
index e00a77d..9ce0bf7 100644
--- a/tumblr-evil-detector.js
+++ b/tumblr-evil-detector.js
@@ -3,19 +3,52 @@
 // @namespace    http://elfsternberg.com
 // @version      0.1
 // @description  Detect if a Tumblr post has an embedded script in it
-// @author       Elf M. Sternberg <elf.sternberg@gmail.com>
+// @author       You
 // @match        http://*.tumblr.com/post/*
 // @grant        none
 // ==/UserScript==
 /* jshint -W097 */
 'use strict';
 
-function tumblr_reblog_warning() {
-    var post = document.querySelectorAll('.post-wrapper script');
-    if (post.length > 0) {
-        document.body.innerHTML += ('<div style="background-color: rgba(0,0,0,0.6);  float: right; position: absolute; top: 60px; width: 320px; color:limegreen; border: 4px solid limegreen; z-index: 50">' +
-                                    'SCRIPT DETECTED</div>');
+if (!Element.prototype.matches) Element.prototype.matches = Element.prototype.msMatchesSelector;
+if (!Element.prototype.closest) Element.prototype.closest = function(selector) {
+    var el = this;
+    while (el) {
+        if (el.matches(selector)) {
+            return el;
+        }
+        el = el.parentElement;
     }
+};
+
+function createFrag(htmlStr) {
+    var frag = document.createDocumentFragment(),
+        temp = document.createElement('div');
+    temp.innerHTML = htmlStr;
+    while (temp.firstChild) {
+        frag.appendChild(temp.firstChild);
+    }
+    return frag;
 }
 
-window.setTimeout(tumblr_reblog_warning, 500);
+function tumblr_reblog_warning() {
+    var post = document.querySelectorAll('.post-wrapper script');
+    var parent;
+    var already;
+    var panel;
+    for(var i = 0; i < post.length; i++) {
+        parent = post[i].closest('.post-wrapper');
+        already = parent.querySelectorAll('.script-detected');
+        if (already.length == 0) {
+            parent.style.border = "4px solid cyan";
+            panel = parent.querySelector('.post-footer')
+            panel.insertBefore(
+                createFrag('<div class="script-detected" style="background-color: rgba(0,0,0,0.6);  float: left; color:limegreen; border: 4px solid limegreen; z-index: 50">' +
+                           'SCRIPT DETECTED</div>'),
+                panel.childNodes[0]);
+        }
+    }
+    setTimeout(tumblr_reblog_warning, 1000);
+}
+
+setTimeout(tumblr_reblog_warning, 500);