1 files changed, 64 insertions, 0 deletions
diff --git a/dom/webidl/FontFaceSet.webidl b/dom/webidl/FontFaceSet.webidl
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+++ b/dom/webidl/FontFaceSet.webidl
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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/.
+ *
+ * The origin of this IDL file is
+ * http://dev.w3.org/csswg/css-font-loading/#FontFaceSet-interface
+ *
+ * Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+// To implement FontFaceSet's iterator until we can use setlike.
+dictionary FontFaceSetIteratorResult
+{
+  required any value;
+  required boolean done;
+};
+
+// To implement FontFaceSet's iterator until we can use setlike.
+[NoInterfaceObject]
+interface FontFaceSetIterator {
+  [Throws] FontFaceSetIteratorResult next();
+};
+
+callback FontFaceSetForEachCallback = void (FontFace value, FontFace key, FontFaceSet set);
+
+enum FontFaceSetLoadStatus { "loading", "loaded" };
+
+// Bug 1072762 is for the FontFaceSet constructor.
+// [Constructor(sequence<FontFace> initialFaces)]
+[Pref="layout.css.font-loading-api.enabled"]
+interface FontFaceSet : EventTarget {
+
+  // Emulate setlike behavior until we can use that directly.
+  readonly attribute unsigned long size;
+  [Throws] void add(FontFace font);
+  boolean has(FontFace font);
+  boolean delete(FontFace font);
+  void clear();
+  [NewObject] FontFaceSetIterator entries();
+  // Iterator keys();
+  [NewObject, Alias=keys, Alias="@@iterator"] FontFaceSetIterator values();
+  [Throws] void forEach(FontFaceSetForEachCallback cb, optional any thisArg);
+
+  // -- events for when loading state changes
+  attribute EventHandler onloading;
+  attribute EventHandler onloadingdone;
+  attribute EventHandler onloadingerror;
+
+  // check and start loads if appropriate
+  // and fulfill promise when all loads complete
+  [NewObject] Promise<sequence<FontFace>> load(DOMString font, optional DOMString text = " ");
+
+  // return whether all fonts in the fontlist are loaded
+  // (does not initiate load if not available)
+  [Throws] boolean check(DOMString font, optional DOMString text = " ");
+
+  // async notification that font loading and layout operations are done
+  [Throws] readonly attribute Promise<void> ready;
+
+  // loading state, "loading" while one or more fonts loading, "loaded" otherwise
+  readonly attribute FontFaceSetLoadStatus status;
+};