bring back behind-the-scene matrix

src/js/dashboard-common.js

@@ -30,7 +30,7 @@ uDom('a').attr('target', '_blank');
 uDom('a[href*="dashboard.html"]').attr('target', '_parent');
 uDom('.whatisthis').on('click', function() {
     uDom(this).parent()
-        .find('.whatisthis-expandable')
+        .descendants('.whatisthis-expandable')
         .toggleClass('whatisthis-expanded');
 });
 

src/js/messaging-handlers.js

@@ -86,16 +86,17 @@ var matrixSnapshot = function(details) {
             popupScopeLevel: µmuser.popupScopeLevel
         }
     };
-/*
-    // Allow to scope on behind-the-scene virtual tab
-    if ( tab.url.indexOf('chrome-extension://' + chrome.runtime.id + '/') === 0 ) {
-        targetTabId = µm.behindTheSceneTabId;
-        targetPageURL = µm.behindTheSceneURL;
-    } else {
-        targetTabId = tab.id;
-        targetPageURL = µm.pageUrlFromTabId(targetTabId);
+
+    // Allow examination of behind-the-scene requests
+    // TODO: Not portable
+    if ( details.tabURL ) {
+        if ( details.tabURL.indexOf('chrome-extension://' + chrome.runtime.id + '/') === 0 ) {
+            details.tabId = µm.behindTheSceneTabId;
+        } else if ( details.tabURL === µm.behindTheSceneURL ) {
+            details.tabId = µm.behindTheSceneTabId;
         }
-*/
+    }
+
     var pageStore = µm.pageStatsFromTabId(details.tabId);
     if ( !pageStore ) {
         return r;

src/js/popup.js

@@ -1059,13 +1059,16 @@ var onMatrixSnapshotReady = function(response) {
 var queryMatrixSnapshot = function(callback) {
     var request = {
         what: 'matrixSnapshot',
-        tabId: targetTabId
+        tabId: targetTabId,
+        tabURL: matrixSnapshot.url
     };
     var onTabsReceived = function(tabs) {
         if ( tabs.length === 0 ) {
             return;
         }
-        request.tabId = targetTabId = tabs[0].id;
+        var tab = tabs[0];
+        request.tabId = targetTabId = tab.id;
+        request.tabURL = tab.url;
         messaging.ask(request, callback);
     };
     if ( targetTabId === undefined ) {