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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.
*/
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 the Set interface, until we can extend Set correctly.
// Implementing these commented out operations and the iterator is
// bug 1072101.
// readonly attribute unsigned long size;
[Throws] void add(FontFace font);
boolean has(FontFace font);
[Throws] boolean delete(FontFace font);
void clear();
// Iterator entries();
// Iterator keys();
// Iterator values();
// void forEach(ForEachCallback cb, optional any thisArg);
// FontFace iterator;
// -- 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
// Not implemented yet: bug 1072102.
[Throws] 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)
// Not implemented yet: bug 1072102.
// [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;
};
// This provides access to the FontFace objects in the FontFaceSet until we
// get iterators working (bug 1072101). Don't enable the pref for the CSS Font
// Loading API until the iterator is available, as we don't want to expose more
// indexed properties on the Web.
partial interface FontFaceSet {
getter FontFace (unsigned long index);
readonly attribute unsigned long length;
};
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