Issue 5599 - ext needs to be defined in the postload script

lib/subscriptionLink.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 "use strict";
 
-if (document instanceof HTMLDocument)
+function setupSubscriptionLink()
 {
-  document.addEventListener("click", event =>
+  if (document instanceof HTMLDocument)
   {
-    // Ignore right-clicks
-    if (event.button == 2)
-      return;
+    document.addEventListener("click", event =>
+    {
+      // Ignore right-clicks
+      if (event.button == 2)
+        return;
 
-    // Ignore simulated clicks.
-    if (event.isTrusted == false)
-      return;
+      // Ignore simulated clicks.
+      if (event.isTrusted == false)
+        return;
 
-    // Search the link associated with the click
-    let link = event.target;
-    while (!(link instanceof HTMLAnchorElement))
-    {
-      link = link.parentNode;
+      // Search the link associated with the click
+      let link = event.target;
+      while (!(link instanceof HTMLAnchorElement))
+      {
+        link = link.parentNode;
 
-      if (!link)
+        if (!link)
+          return;
+      }
+
+      let queryString = null;
+      if (link.protocol == "http:" || link.protocol == "https:")
+      {
+        if (link.host == "subscribe.adblockplus.org" && link.pathname == "/")
+          queryString = link.search.substr(1);
+      }
+      else
+      {
+        // Firefox 51 doesn't seem to populate the "search" property for
+        // links with non-standard URL schemes so we need to extract the query
+        // string manually.
+        let match = /^abp:\/*subscribe\/*\?(.*)/i.exec(link.href);
+        if (match)
+          queryString = match[1];
+      }
+
+      if (!queryString)
         return;
-    }
 
-    let queryString = null;
-    if (link.protocol == "http:" || link.protocol == "https:")
-    {
-      if (link.host == "subscribe.adblockplus.org" && link.pathname == "/")
-        queryString = link.search.substr(1);
-    }
-    else
-    {
-      // Firefox 51 doesn't seem to populate the "search" property for
-      // links with non-standard URL schemes so we need to extract the query
-      // string manually.
-      let match = /^abp:\/*subscribe\/*\?(.*)/i.exec(link.href);
-      if (match)
-        queryString = match[1];
-    }
+      // This is our link - make sure the browser doesn't handle it
+      event.preventDefault();
+      event.stopPropagation();
 
-    if (!queryString)
-      return;
+      // Decode URL parameters
+      let title = null;
+      let url = null;
+      for (let param of queryString.split("&"))
+      {
+        let parts = param.split("=", 2);
+        if (parts.length != 2 || !/\S/.test(parts[1]))
+          continue;
+        switch (parts[0])
+        {
+          case "title":
+            title = decodeURIComponent(parts[1]);
+            break;
+          case "location":
+            url = decodeURIComponent(parts[1]);
+            break;
+        }
+      }
+      if (!url)
+        return;
 
-    // This is our link - make sure the browser doesn't handle it
-    event.preventDefault();
-    event.stopPropagation();
+      // Default title to the URL
+      if (!title)
+        title = url;
 
-    // Decode URL parameters
-    let title = null;
-    let url = null;
-    for (let param of queryString.split("&"))
-    {
-      let parts = param.split("=", 2);
-      if (parts.length != 2 || !/\S/.test(parts[1]))
-        continue;
-      switch (parts[0])
-      {
-        case "title":
-          title = decodeURIComponent(parts[1]);
-          break;
-        case "location":
-          url = decodeURIComponent(parts[1]);
-          break;
-      }
-    }
-    if (!url)
-      return;
+      // Trim spaces in title and URL
+      title = title.trim();
+      url = url.trim();
+      if (!/^(https?|ftp):/.test(url))
+        return;
 
-    // Default title to the URL
-    if (!title)
-      title = url;
+      ext.backgroundPage.sendMessage({
+        type: "subscriptions.add",
+        title,
+        url,
+        confirm: true
+      });
+    }, true);
+  }
+}
 
-    // Trim spaces in title and URL
-    title = title.trim();
-    url = url.trim();
-    if (!/^(https?|ftp):/.test(url))
-      return;
-
-    ext.backgroundPage.sendMessage({
-      type: "subscriptions.add",
-      title,
-      url,
-      confirm: true
-    });
-  }, true);
-}
+exports.setupSubscriptionLink = setupSubscriptionLink;