1 files changed, 53 insertions, 0 deletions
diff --git a/src/js/contentscripts/utils.js b/src/js/contentscripts/utils.js
new file mode 100644
index 0000000..9f0a0fa
--- /dev/null
+++ b/src/js/contentscripts/utils.js
@@ -0,0 +1,53 @@
+/*
+ * This file is part of Privacy Badger <https://www.eff.org/privacybadger>
+ * Copyright (C) 2018 Electronic Frontier Foundation
+ *
+ * Privacy Badger 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.
+ *
+ * Privacy Badger 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 Privacy Badger.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Executes a script in the page's JavaScript context.
+ *
+ * @param {String} text The content of the script to insert.
+ * @param {Object} data Data attributes to set on the inserted script tag.
+ */
+window.injectScript = function (text, data) {
+  var parent = document.documentElement,
+    script = document.createElement('script');
+
+  script.text = text;
+  script.async = false;
+
+  for (var key in data) {
+    script.setAttribute('data-' + key.replace(/_/g, '-'), data[key]);
+  }
+
+  parent.insertBefore(script, parent.firstChild);
+  parent.removeChild(script);
+};
+
+function getFrameUrl() {
+  let url = document.location.href,
+    parentFrame = (document != window.top) && window.parent;
+  while (parentFrame && url && !url.startsWith("http")) {
+    try {
+      url = parentFrame.document.location.href;
+    } catch (ex) {
+      // ignore 'Blocked a frame with origin "..."
+      // from accessing a cross-origin frame.' exceptions
+    }
+    parentFrame = (parentFrame != window.top) && parentFrame.parent;
+  }
+  return url;
+}
+window.FRAME_URL = getFrameUrl();