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

lib/inspectorObserver.js

Index: lib/inspectorObserver.js
===================================================================
--- a/lib/inspectorObserver.js
+++ b/lib/inspectorObserver.js
@@ -44,20 +44,34 @@ let InspectorObserver =
       return;
 
     let tooltiptext = InspectorObserver.inspectorButtonTooltip;
     button = panelWindow.document.createElement("toolbarbutton");
     button.setAttribute("id", "ehh-inspector-toolbarbutton");
     button.setAttribute("class", "devtools-toolbarbutton");
     button.setAttribute("tooltiptext", tooltiptext);
     button.setAttribute("tabindex", "0");
-    button.addEventListener("command", function()
+    button.addEventListener("command", () =>
     {
-      panelWindow.openDialog("chrome://elemhidehelper/content/composer.xul", "_blank",
-                             "chrome,centerscreen,resizable,dialog=no", panel.selection.node);
+      let node = panel.selection.node;
+      let doc = null;
+      let domain = null;

[Thomas Greiner, 2015/07/28 13:52:18]

This variable should be named "host" from looking at the rest of the code.

+      if (!node)
+      {
+        // No local node available, but maybe a wrapper around a remote one
+        let {Services} = Cu.import("resource://gre/modules/Services.jsm");
+        node = panel.selection.nodeFront;
+        doc = panel.selection.documentFront;
+        host = Services.io.newURI(panel.target.url, null, null).host;
+      }
+      if (node.nodeType == Ci.nsIDOMNode.ELEMENT_NODE)
+      {
+        panelWindow.openDialog("chrome://elemhidehelper/content/composer.xul", "_blank",

[Thomas Greiner, 2015/07/28 13:52:18]

Detail: Please break these lines accordingly to fit in the 80 characters limit.

+                               "chrome,centerscreen,resizable,dialog=no", node, doc, host);
+      }
     }, false);
 
     //Override button style for light DevTools theme
     let style = panelWindow.document.createProcessingInstruction("xml-stylesheet", 'href="chrome://elemhidehelper/skin/devToolsOverlay.css" type="text/css"');
     panelWindow.document.insertBefore(style, panelWindow.document.firstChild);
 
     inspectBtn.parentNode.insertBefore(button, inspectBtn);
   }