Issue 2381 - Added share overlay to options page

common.js

Index: common.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/common.js
@@ -0,0 +1,110 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2015 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/>.
+ */
+
+(function(global)
+{
+  global.E = function E(id)
+  {
+    return document.getElementById(id);
+  }
+
+  global.getDocLink = function(link, callback)
+  {
+    ext.backgroundPage.sendMessage({
+      type: "app.get",
+      what: "doclink",
+      link: link
+    }, callback);
+  }
+
+  global.checkShareResource = function(url, callback)
+  {
+    ext.backgroundPage.sendMessage(
+    {
+      type: "filters.blocked",
+      url: url,
+      requestType: "SCRIPT",
+      docDomain: "adblockplus.org",
+      thirdParty: true
+    }, callback);
+  }
+
+  global.openSharePopup = function(url)
+  {
+    var glassPane = E("glass-pane");
+    if (!glassPane)
+    {
+      glassPane = document.createElement("div");
+      glassPane.setAttribute("id", "glass-pane");
+      document.body.appendChild(glassPane);
+    }
+    var iframe = E("share-popup");
+    if (!iframe)
+    {
+      iframe = document.createElement("iframe");
+      iframe.setAttribute("id", "share-popup");
+      iframe.setAttribute("scrolling", "no");
+      glassPane.appendChild(iframe);
+    }
+    var popupMessageReceived = false;
+
+    var popupMessageListener = function(event)
+    {
+      if (!/[.\/]adblockplus\.org$/.test(event.origin)
+        || !("width" in event.data)
+        || !("height" in event.data))
+        return;
+
+      var width = event.data.width;
+      var height = event.data.height;
+      iframe.width = width;
+      iframe.height = height;
+      iframe.style.marginTop = -height/2 + "px";
+      iframe.style.marginLeft = -width/2 + "px";
+      popupMessageReceived = true;
+      window.removeEventListener("message", popupMessageListener);
+    };
+    // Firefox requires last parameter to be true to be triggered by unprivileged pages
+    window.addEventListener("message", popupMessageListener, false, true);
+
+    var popupLoadListener = function()
+    {
+      if (popupMessageReceived)
+      {
+        iframe.className = "visible";
+
+        var popupCloseListener = function()
+        {
+          iframe.className = glassPane.className = "";
+          document.removeEventListener("click", popupCloseListener);
+        };
+        document.addEventListener("click", popupCloseListener, false);
+      }
+      else
+      {
+        glassPane.className = "";
+        window.removeEventListener("message", popupMessageListener);
+      }
+
+      iframe.removeEventListener("load", popupLoadListener);
+    };
+    iframe.addEventListener("load", popupLoadListener, false);
+
+    iframe.src = url;
+    glassPane.className = "visible";
+  }
+})(this);