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#ifndef FontSelector_h
27#define FontSelector_h
28
29#include <wtf/Forward.h>
30#include <wtf/PassRefPtr.h>
31#include <wtf/RefCounted.h>
32
33namespace WebCore {
34
35class FontData;
36class FontDescription;
37class FontSelectorClient;
38
39class FontSelector : public RefCounted<FontSelector> {
40public:
41    virtual ~FontSelector() { }
42
43    // FIXME: Remove the "get" prefix from these two member functions
44    virtual PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString& familyName) = 0;
45    virtual PassRefPtr<FontData> getFallbackFontData(const FontDescription&, size_t) = 0;
46
47    virtual size_t fallbackFontDataCount() = 0;
48    virtual bool resolvesFamilyFor(const FontDescription&) const = 0;
49
50    virtual void fontCacheInvalidated() { }
51
52    virtual void registerForInvalidationCallbacks(FontSelectorClient*) = 0;
53    virtual void unregisterForInvalidationCallbacks(FontSelectorClient*) = 0;
54
55    virtual unsigned uniqueId() const = 0;
56    virtual unsigned version() const = 0;
57};
58
59class FontSelectorClient {
60public:
61    virtual ~FontSelectorClient() { }
62
63    virtual void fontsNeedUpdate(FontSelector*) = 0;
64};
65
66} // namespace WebCore
67
68#endif // FontSelector_h
69