Make the base URI for anon nodes in an XBL binding be the URI of the XBL

document.  Bug 211128, r+sr=jst, a=chofmann

content/base/src/Makefile.in

@@ -70,6 +70,7 @@ REQUIRES	= xpcom \
 		  webbrowserpersist \
 		  imglib2 \
 		  prefetch \
+		  xuldoc \
 		  $(NULL)
 
 EXPORTS		= \

content/base/src/nsGenericElement.cpp

@@ -80,6 +80,7 @@
 
 #include "nsIBindingManager.h"
 #include "nsXBLBinding.h"
+#include "nsXBLPrototypeBinding.h"
 #include "nsIDOMCSSStyleDeclaration.h"
 #include "nsIDOMViewCSS.h"
 #include "nsIXBLService.h"
@@ -2379,13 +2380,38 @@ nsGenericElement::GetBaseURI() const
     return nsnull;
   }
 
-  // Our base URL depends on whether we have an xml:base attribute, as
-  // well as on whether any of our ancestors do.
-  nsCOMPtr<nsIURI> parentBase;
+  // Our base URL depends on whether we have an xml:base attribute, as well as
+  // on whether any of our ancestors do.  The basic idea is to ask our parent
+  // (GetParent() if we have one, our document otherwise) for its base
+  // URL. Then we resolve our xml:base attr, if any, relative to that.
+
+  // The one complication is that we may be an anonymous node bound via XBL.
+  // If this is the case, we still want to use our parent's baseURL unless our
+  // parent is not part of our own binding (eg is the element the binding is
+  // attached to).  If that is the case, we want to use the binding url as the
+  // "parent" url.
 
   nsIContent *parent = GetParent();
+  nsCOMPtr<nsIURI> parentBase;
   if (parent) {
-    parentBase = parent->GetBaseURI();
+    // XXX Not all things with a bindingParent are actually XBL anonymous
+    // content, so we may not end up getting a binding in the case when we have
+    // a bindingParent...  This seems very wrong.  Perhaps it should be fixed?
+    if (!IsNativeAnonymous()) {
+      nsIContent* bindingParent = GetBindingParent();
+      nsIContent* parentsBindingParent = parent->GetBindingParent();
+      if (bindingParent != parentsBindingParent) {
+        nsXBLBinding* binding =
+          doc->BindingManager()->GetBinding(bindingParent);
+        if (binding) {
+          parentBase = binding->PrototypeBinding()->BindingURI();
+        }
+      }
+    }
+
+    if (!parentBase) {
+      parentBase = parent->GetBaseURI();
+    }
   } else {
     // No parent, so just use the document (we must be the root or not in the
     // tree).