Issue 6539, 6782 - Implement support for snippets

include.preload.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";
 
 let {splitSelector} = require("./adblockpluscore/lib/common");
 let {ElemHideEmulation} =
   require("./adblockpluscore/lib/content/elemHideEmulation");
 
 // This variable is also used by our other content scripts.
-let content;
+let contentFiltering;
 
 const typeMap = new Map([
   ["img", "IMAGE"],
   ["input", "IMAGE"],
   ["picture", "IMAGE"],
   ["audio", "MEDIA"],
   ["video", "MEDIA"],
   ["frame", "SUBDOCUMENT"],
   ["iframe", "SUBDOCUMENT"],
   ["object", "OBJECT"],
@@ skipping 183 matching lines @@
     },
     collapse =>
     {
       if (collapse)
       {
         if (selector)
         {
           if (!collapsingSelectors.has(selector))
           {
             collapsingSelectors.add(selector);
-            content.addSelectors([selector], null, "collapsing", true);
+            contentFiltering.addSelectors([selector], null, "collapsing", true);
           }
         }
         else
         {
           hideElement(element);
         }
       }
     }
   );
 }
@@ skipping 147 matching lines @@
   },
 
   disconnect()
   {
     document.removeEventListener("DOMContentLoaded", this.trace);
     this.observer.disconnect();
     clearTimeout(this.timeout);
   }
 };
 
-function Content()
+function ContentFiltering()
 {
   this.shadow = this.createShadowTree();
   this.styles = new Map();
   this.tracer = null;
   this.inline = true;
   this.inlineEmulated = true;
 
   this.elemHideEmulation = new ElemHideEmulation(
     this.addSelectors.bind(this),
     this.hideElements.bind(this)
   );
 }
-Content.prototype = {
+ContentFiltering.prototype = {
   selectorGroupSize: 1024,
 
   createShadowTree()
   {
     // Use Shadow DOM if available as to not mess with with web pages that
     // rely on the order of their own <style> tags (#309). However, creating
     // a shadow root breaks running CSS transitions. So we have to create
     // the shadow root before transistions might start (#452).
     if (!("createShadowRoot" in document.documentElement))
       return null;
@@ skipping 130 matching lines @@
     if (this.tracer)
     {
       browser.runtime.sendMessage({
         type: "hitLogger.traceElemHide",
         selectors: [],
         filters
       });
     }
   },
 
-  applyFilters(filterTypes)
+  apply(filterTypes)
   {
     browser.runtime.sendMessage({
-      type: "content.applyFilters", filterTypes
+      type: "content.applyFilters",
+      filterTypes
     },
     response =>
     {
       if (this.tracer)
         this.tracer.disconnect();
       this.tracer = null;
 
       if (response.trace)
         this.tracer = new ElementHidingTracer();
 
@@ skipping 13 matching lines @@
 
       this.elemHideEmulation.apply(response.emulatedPatterns);
     });
   }
 };
 
 if (document instanceof HTMLDocument)
 {
   checkSitekey();
 
-  content = new Content();
-  content.applyFilters();
+  contentFiltering = new ContentFiltering();
+  contentFiltering.apply();
 
   document.addEventListener("error", event =>
   {
     checkCollapse(event.target);
   }, true);
 
   document.addEventListener("load", event =>
   {
     let element = event.target;
     if (/^i?frame$/.test(element.localName))
       checkCollapse(element);
   }, true);
 }
 
 window.checkCollapse = checkCollapse;
-window.content = content;
+window.contentFiltering = contentFiltering;
 window.typeMap = typeMap;
 window.getURLsFromElement = getURLsFromElement;