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64 lines
2.4 KiB
Plaintext
64 lines
2.4 KiB
Plaintext
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/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* The origin of this IDL file is
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* http://dev.w3.org/csswg/css-font-loading/#FontFaceSet-interface
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*
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* Copyright © 2014 W3C® (MIT, ERCIM, Keio, Beihang), All Rights Reserved. W3C
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* liability, trademark and document use rules apply.
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*/
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enum FontFaceSetLoadStatus { "loading", "loaded" };
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// Bug 1072762 is for the FontFaceSet constructor.
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// [Constructor(sequence<FontFace> initialFaces)]
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[Pref="layout.css.font-loading-api.enabled"]
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interface FontFaceSet : EventTarget {
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// Emulate the Set interface, until we can extend Set correctly.
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// Implementing these commented out operations and the iterator is
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// bug 1072101.
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// readonly attribute unsigned long size;
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[Throws] void add(FontFace font);
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boolean has(FontFace font);
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[Throws] boolean delete(FontFace font);
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void clear();
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// Iterator entries();
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// Iterator keys();
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// Iterator values();
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// void forEach(ForEachCallback cb, optional any thisArg);
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// FontFace iterator;
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// -- events for when loading state changes
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attribute EventHandler onloading;
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attribute EventHandler onloadingdone;
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attribute EventHandler onloadingerror;
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// check and start loads if appropriate
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// and fulfill promise when all loads complete
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// Not implemented yet: bug 1072102.
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[Throws] Promise<sequence<FontFace>> load(DOMString font, optional DOMString text = " ");
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// return whether all fonts in the fontlist are loaded
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// (does not initiate load if not available)
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// Not implemented yet: bug 1072102.
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// [Throws] boolean check(DOMString font, optional DOMString text = " ");
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// async notification that font loading and layout operations are done
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[Throws] readonly attribute Promise<void> ready;
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// loading state, "loading" while one or more fonts loading, "loaded" otherwise
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readonly attribute FontFaceSetLoadStatus status;
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};
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// This provides access to the FontFace objects in the FontFaceSet until we
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// get iterators working (bug 1072101). Don't enable the pref for the CSS Font
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// Loading API until the iterator is available, as we don't want to expose more
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// indexed properties on the Web.
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partial interface FontFaceSet {
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getter FontFace (unsigned long index);
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readonly attribute unsigned long length;
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};
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