Bug 686581 - Implement -moz-is-resource-document media query. r=roc

content/base/src/nsGkAtomList.h

@@ -1902,6 +1902,7 @@ GK_ATOM(_moz_maemo_classic, "-moz-maemo-classic")
 GK_ATOM(_moz_menubar_drag, "-moz-menubar-drag")
 GK_ATOM(_moz_device_pixel_ratio, "-moz-device-pixel-ratio")
 GK_ATOM(_moz_device_orientation, "-moz-device-orientation")
+GK_ATOM(_moz_is_resource_document, "-moz-is-resource-document")
 
 #ifdef ACCESSIBILITY
 GK_ATOM(anonid, "anonid")

layout/style/nsMediaFeatures.cpp

@@ -194,6 +194,15 @@ GetDeviceOrientation(nsPresContext* aPresContext, const nsMediaFeature*,
     return NS_OK;
 }
 
+static nsresult
+GetIsResourceDocument(nsPresContext* aPresContext, const nsMediaFeature*,
+                      nsCSSValue& aResult)
+{
+  nsIDocument* doc = aPresContext->Document();
+  aResult.SetIntValue(doc && doc->IsResourceDoc() ? 1 : 0, eCSSUnit_Integer);
+  return NS_OK;
+}
+
 // Helper for two features below
 static nsresult
 MakeArray(const nsSize& aSize, nsCSSValue& aResult)
@@ -460,6 +469,13 @@ nsMediaFeatures::features[] = {
         { kOrientationKeywords },
         GetDeviceOrientation
     },
+    {
+        &nsGkAtoms::_moz_is_resource_document,
+        nsMediaFeature::eMinMaxNotAllowed,
+        nsMediaFeature::eBoolInteger,
+        { nsnull },
+        GetIsResourceDocument
+    },
     {
         &nsGkAtoms::_moz_scrollbar_start_backward,
         nsMediaFeature::eMinMaxNotAllowed,