1 files changed, 48 insertions, 0 deletions
diff --git a/layout/style/nsICSSLoaderObserver.h b/layout/style/nsICSSLoaderObserver.h
new file mode 100644
index 0000000000..1f0d5b5130
--- /dev/null
+++ b/layout/style/nsICSSLoaderObserver.h
@@ -0,0 +1,48 @@
+/* -*- 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/. */
+
+/* internal interface for observing CSS style sheet loads */
+
+#ifndef nsICSSLoaderObserver_h___
+#define nsICSSLoaderObserver_h___
+
+#include "nsISupports.h"
+
+#define NS_ICSSLOADEROBSERVER_IID                    \
+  {                                                  \
+    0xf51fbf2c, 0xfe4b, 0x4a15, {                    \
+      0xaf, 0x7e, 0x5e, 0x20, 0x64, 0x5f, 0xaf, 0x58 \
+    }                                                \
+  }
+
+namespace mozilla {
+class StyleSheet;
+}
+
+class nsICSSLoaderObserver : public nsISupports {
+ public:
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ICSSLOADEROBSERVER_IID)
+
+  /**
+   * StyleSheetLoaded is called after aSheet is marked complete and before any
+   * load events associated with aSheet are fired.
+   * @param aSheet the sheet that was loaded. Guaranteed to always be
+   *        non-null, even if aStatus indicates failure.
+   * @param aWasDeferred whether the sheet load was deferred, due to it being an
+   *        alternate sheet, or having a non-matching media list.
+   * @param aStatus is a success code if the sheet loaded successfully and a
+   *        failure code otherwise.  Note that successful load of aSheet
+   *        doesn't indicate anything about whether the data actually parsed
+   *        as CSS, and doesn't indicate anything about the status of any child
+   *        sheets of aSheet.
+   */
+  NS_IMETHOD StyleSheetLoaded(mozilla::StyleSheet* aSheet, bool aWasDeferred,
+                              nsresult aStatus) = 0;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(nsICSSLoaderObserver, NS_ICSSLOADEROBSERVER_IID)
+
+#endif  // nsICSSLoaderObserver_h___