1 files changed, 118 insertions, 0 deletions
diff --git a/data/extensions/spyblock@gnu.org/lib/child/elemHideEmulation.js b/data/extensions/spyblock@gnu.org/lib/child/elemHideEmulation.js
new file mode 100644
index 0000000..7c4ee17
--- /dev/null
+++ b/data/extensions/spyblock@gnu.org/lib/child/elemHideEmulation.js
@@ -0,0 +1,118 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2017 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";
+
+(function()
+{
+  let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
+
+  let {port} = require("messaging");
+  let {getFrames, isPrivate} = require("child/utils");
+  let {RequestNotifier} = require("child/requestNotifier");
+
+  function getFilters(window, callback)
+  {
+    let message = {
+      frames: getFrames(window),
+      payload: {
+        type: "filters.get",
+        what: "elemhideemulation"
+      }
+    };
+    port.emitWithResponse("ext_message", message).then(callback);
+  }
+
+  function addUserCSS(window, cssCode)
+  {
+    let uri = Services.io.newURI("data:text/css," + encodeURIComponent(cssCode),
+        null, null);
+    let utils = window.QueryInterface(Ci.nsIInterfaceRequestor)
+                      .getInterface(Ci.nsIDOMWindowUtils);
+    utils.loadSheet(uri, Ci.nsIDOMWindowUtils.USER_SHEET);
+  }
+
+  function initElemHideEmulation()
+  {
+    let scope = Object.assign({}, require("common"));
+    Services.scriptloader.loadSubScript(
+        "chrome://adblockplus/content/elemHideEmulation.js", scope);
+
+    let onContentWindow = (subject, topic, data) =>
+    {
+      if (!(subject instanceof Ci.nsIDOMWindow))
+        return;
+
+      let onReady = event =>
+      {
+        subject.removeEventListener("load", onReady);
+        let handler = new scope.ElemHideEmulation(
+          subject, getFilters.bind(null, subject), (selectors, filters) =>
+          {
+            if (selectors.length == 0)
+              return;
+
+            addUserCSS(subject, selectors.map(
+              selector => selector + "{display: none !important;}"
+            ).join("\n"));
+
+            if (!isPrivate(subject))
+              port.emit("addHits", filters);
+
+            let docDomain = null;
+            try
+            {
+              // We are calling getFrames() here because it will consider
+              // "inheritance" for about:blank and data: frames.
+              docDomain = new URL(getFrames(subject)[0].location).hostname;
+            }
+            catch (e)
+            {
+              // Invalid URL?
+            }
+
+            for (let i = 0; i < filters.length; i++)
+            {
+              RequestNotifier.addNodeData(subject.document, subject.top, {
+                contentType: "ELEMHIDE",
+                docDomain: docDomain,
+                thirdParty: false,
+                location: "##" + selectors[i],
+                filter: filters[i],
+                filterType: "elemhideemulation"
+              });
+            }
+          }
+        );
+
+        handler.apply();
+      };
+
+      subject.addEventListener("load", onReady);
+    };
+
+    Services.obs.addObserver(onContentWindow, "content-document-global-created",
+        false);
+    onShutdown.add(() =>
+    {
+      Services.obs.removeObserver(onContentWindow,
+          "content-document-global-created");
+    });
+  }
+
+  initElemHideEmulation();
+})();