/* * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "FontRanges.h" #include <wtf/Forward.h> #include <wtf/RefCounted.h> namespace WebCore { class FontCascadeDescription; class FontDescription; class FontSelectorClient; class FontAccessor : public RefCounted<FontAccessor> { public: virtual ~FontAccessor() = default; virtual const Font* font(ExternalResourceDownloadPolicy) const = 0; virtual bool isLoading() const = 0; }; class FontSelector : public RefCounted<FontSelector> { public: virtual ~FontSelector() = default; virtual FontRanges fontRangesForFamily(const FontDescription&, const AtomString&) = 0; virtual RefPtr<Font> fallbackFontAt(const FontDescription&, size_t) = 0; virtual size_t fallbackFontCount() = 0; virtual void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomString& family) = 0; virtual void fontCacheInvalidated() { } virtual void registerForInvalidationCallbacks(FontSelectorClient&) = 0; virtual void unregisterForInvalidationCallbacks(FontSelectorClient&) = 0; virtual unsigned uniqueId() const = 0; virtual unsigned version() const = 0; }; }