import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/inspector/nsIDOMFontFace.idl

@@ -0,0 +1,32 @@
+/* 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/. */
+
+#include "nsISupports.idl"
+
+interface nsIDOMCSSFontFaceRule;
+interface nsIDOMCSSStyleDeclaration;
+
+[scriptable, uuid(9a3b1272-6585-4f41-b08f-fdc5da444cd0)]
+interface nsIDOMFontFace : nsISupports
+{
+  // An indication of how we found this font during font-matching.
+  // Note that the same physical font may have been found in multiple ways within a range.
+  readonly attribute boolean fromFontGroup;
+  readonly attribute boolean fromLanguagePrefs;
+  readonly attribute boolean fromSystemFallback;
+
+  // available for all fonts
+  readonly attribute DOMString name; // full font name as obtained from the font resource
+  readonly attribute DOMString CSSFamilyName; // a family name that could be used in CSS font-family
+                                              // (not necessarily the actual name that was used,
+                                              // due to aliases, generics, localized names, etc)
+
+  // meaningful only when the font is a user font defined using @font-face
+  readonly attribute nsIDOMCSSFontFaceRule rule; // null if no associated @font-face rule
+  readonly attribute long srcIndex; // index in the rule's src list, -1 if no @font-face rule
+  readonly attribute DOMString URI; // null if not a downloaded font, i.e. local
+  readonly attribute DOMString localName; // null if not a src:local(...) rule
+  readonly attribute DOMString format; // as per http://www.w3.org/TR/css3-webfonts/#referencing
+  readonly attribute DOMString metadata; // XML metadata from WOFF file (if any)
+};