1 files changed, 122 insertions, 0 deletions
diff --git a/dom/xbl/nsXBLService.h b/dom/xbl/nsXBLService.h
new file mode 100644
index 000000000..5082bc42b
--- /dev/null
+++ b/dom/xbl/nsXBLService.h
@@ -0,0 +1,122 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef nsXBLService_h_
+#define nsXBLService_h_
+
+#include "nsString.h"
+#include "nsWeakReference.h"
+#include "nsTArray.h"
+#include "nsDataHashtable.h"
+#include "nsHashKeys.h"
+
+class nsXBLBinding;
+class nsXBLDocumentInfo;
+class nsIContent;
+class nsIDocument;
+class nsString;
+class nsIURI;
+class nsIPrincipal;
+
+namespace mozilla {
+namespace dom {
+class EventTarget;
+} // namespace dom
+} // namespace mozilla
+
+class nsXBLService final : public nsSupportsWeakReference
+{
+  NS_DECL_ISUPPORTS
+
+  static nsXBLService* gInstance;
+
+  static void Init();
+
+  static void Shutdown() {
+    NS_IF_RELEASE(gInstance);
+  }
+
+  static nsXBLService* GetInstance() { return gInstance; }
+
+  static bool IsChromeOrResourceURI(nsIURI* aURI);
+
+  // This function loads a particular XBL file and installs all of the bindings
+  // onto the element.  aOriginPrincipal must not be null here.
+  nsresult LoadBindings(nsIContent* aContent, nsIURI* aURL,
+                        nsIPrincipal* aOriginPrincipal,
+                        nsXBLBinding** aBinding, bool* aResolveStyle);
+
+  // Indicates whether or not a binding is fully loaded.
+  nsresult BindingReady(nsIContent* aBoundElement, nsIURI* aURI, bool* aIsReady);
+
+  // This method checks the hashtable and then calls FetchBindingDocument on a
+  // miss.  aOriginPrincipal or aBoundDocument may be null to bypass security
+  // checks.
+  nsresult LoadBindingDocumentInfo(nsIContent* aBoundElement,
+                                   nsIDocument* aBoundDocument,
+                                   nsIURI* aBindingURI,
+                                   nsIPrincipal* aOriginPrincipal,
+                                   bool aForceSyncLoad,
+                                   nsXBLDocumentInfo** aResult);
+
+  // Used by XUL key bindings and for window XBL.
+  static nsresult AttachGlobalKeyHandler(mozilla::dom::EventTarget* aTarget);
+  static nsresult DetachGlobalKeyHandler(mozilla::dom::EventTarget* aTarget);
+
+private:
+  nsXBLService();
+  virtual ~nsXBLService();
+
+protected:
+  // This function clears out the bindings on a given content node.
+  nsresult FlushStyleBindings(nsIContent* aContent);
+
+  // This method synchronously loads and parses an XBL file.
+  nsresult FetchBindingDocument(nsIContent* aBoundElement, nsIDocument* aBoundDocument,
+                                nsIURI* aDocumentURI, nsIURI* aBindingURI,
+                                nsIPrincipal* aOriginPrincipal, bool aForceSyncLoad,
+                                nsIDocument** aResult);
+
+  /**
+   * This method calls the one below with an empty |aDontExtendURIs| array.
+   */
+  nsresult GetBinding(nsIContent* aBoundElement, nsIURI* aURI,
+                      bool aPeekFlag, nsIPrincipal* aOriginPrincipal,
+                      bool* aIsReady, nsXBLBinding** aResult);
+
+  /**
+   * This method loads a binding doc and then builds the specific binding
+   * required. It can also peek without building.
+   * @param aBoundElement the element to get a binding for
+   * @param aURI the binding URI
+   * @param aPeekFlag if true then just peek to see if the binding is ready
+   * @param aIsReady [out] if the binding is ready or not
+   * @param aResult [out] where to store the resulting binding (not used if
+   *                      aPeekFlag is true, otherwise it must be non-null)
+   * @param aDontExtendURIs a set of URIs that are already bound to this
+   *        element. If a binding extends any of these then further loading
+   *        is aborted (because it would lead to the binding extending itself)
+   *        and NS_ERROR_ILLEGAL_VALUE is returned.
+   *
+   * @note This method always calls LoadBindingDocumentInfo(), so it's
+   *       enough to funnel all security checks through that function.
+   */
+  nsresult GetBinding(nsIContent* aBoundElement, nsIURI* aURI,
+                      bool aPeekFlag, nsIPrincipal* aOriginPrincipal,
+                      bool* aIsReady, nsXBLBinding** aResult,
+                      nsTArray<nsCOMPtr<nsIURI>>& aDontExtendURIs);
+
+// MEMBER VARIABLES
+public:
+  static bool gDisableChromeCache;
+  static bool     gAllowDataURIs;            // Whether we should allow data
+                                             // urls in -moz-binding. Needed for
+                                             // testing.
+};
+
+#endif