Issue 2816 - Partial fix for EHH button in inspector tool, preview functionality still broken

lib/aardvark.js

 /*
  * This Source Code is subject to the terms of the Mozilla Public License
  * version 2.0 (the "License"). You can obtain a copy of the License at
  * http://mozilla.org/MPL/2.0/.
  */
 
 let {Prefs} = require("prefs");
 
 // Make sure to stop selection when we are uninstalled
 onShutdown.add(() => Aardvark.quit());
@@ skipping 554 matching lines @@
     this.boxElem = null;
     E = id => null;
     return false;
   },
 
   select: function(elem)
   {
     if (!elem)
       return false;
 
-    this.window.openDialog("chrome://elemhidehelper/content/composer.xul", "_blank",
-                           "chrome,centerscreen,resizable,dialog=no", elem);
-    this.quit();
+    this.browser.selectedBrowser.messageManager.sendAsyncMessage(
+      "ElemHideHelper:GetNodeInfo",
+      null,
+      {
+        element: elem,
+        callback: (nodeData, host) =>
+        {
+          this.window.openDialog("chrome://elemhidehelper/content/composer.xul", "_blank",
+                                 "chrome,centerscreen,resizable,dialog=no", nodeData, host);
+          this.quit();
+        }
+      }
+    );
     return false;
   },
 
   blinkElement: function(elem)
   {
     if (!elem)
       return false;
 
     if ("blinkTimer" in this)
       this.stopBlinking();
@@ skipping 159 matching lines @@
     // Show help box
     helpBox.showPopup(this.browser, -1, -1, "tooltip", "topleft", "topleft");
     return true;
   }
 }
 
 // Makes sure event handlers like Aardvark.onKeyPress always have the correct
 // this pointer set.
 for (let method of ["onMouseClick", "onMouseScroll", "onKeyPress", "onPageHide", "onMouseMove", "onAfterPaint", "quit"])
   Aardvark[method] = Aardvark[method].bind(Aardvark);