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/*
* 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;
};
}