1/*
2 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "FontRanges.h"
29#include <wtf/Forward.h>
30#include <wtf/RefCounted.h>
31
32namespace WebCore {
33
34class FontCascadeDescription;
35class FontDescription;
36class FontSelectorClient;
37
38class FontAccessor : public RefCounted<FontAccessor> {
39public:
40 virtual ~FontAccessor() = default;
41
42 virtual const Font* font(ExternalResourceDownloadPolicy) const = 0;
43 virtual bool isLoading() const = 0;
44};
45
46class FontSelector : public RefCounted<FontSelector> {
47public:
48 virtual ~FontSelector() = default;
49
50 virtual FontRanges fontRangesForFamily(const FontDescription&, const AtomicString&) = 0;
51 virtual RefPtr<Font> fallbackFontAt(const FontDescription&, size_t) = 0;
52
53 virtual size_t fallbackFontCount() = 0;
54
55 virtual void opportunisticallyStartFontDataURLLoading(const FontCascadeDescription&, const AtomicString& family) = 0;
56
57 virtual void fontCacheInvalidated() { }
58
59 virtual void registerForInvalidationCallbacks(FontSelectorClient&) = 0;
60 virtual void unregisterForInvalidationCallbacks(FontSelectorClient&) = 0;
61
62 virtual unsigned uniqueId() const = 0;
63 virtual unsigned version() const = 0;
64};
65
66}
67