1/*
2 * Copyright (C) 2007, 2008, 2011 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 COMPUTER, 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 COMPUTER, 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 CSSFontFaceSource_h
27#define CSSFontFaceSource_h
28
29#include "platform/heap/Handle.h"
30#include "wtf/HashMap.h"
31
32namespace blink {
33
34class FontResource;
35class CSSFontFace;
36class FontDescription;
37class SimpleFontData;
38
39class CSSFontFaceSource : public NoBaseWillBeGarbageCollectedFinalized<CSSFontFaceSource> {
40public:
41    virtual ~CSSFontFaceSource();
42
43    virtual bool isLocal() const { return false; }
44    virtual bool isLoading() const { return false; }
45    virtual bool isLoaded() const { return true; }
46    virtual bool isValid() const { return true; }
47
48    virtual FontResource* resource() { return 0; }
49    void setFontFace(CSSFontFace* face) { m_face = face; }
50
51    PassRefPtr<SimpleFontData> getFontData(const FontDescription&);
52
53    virtual bool isLocalFontAvailable(const FontDescription&) { return false; }
54    virtual void beginLoadIfNeeded() { }
55
56    // For UMA reporting
57    virtual bool hadBlankText() { return false; }
58
59    virtual void trace(Visitor*);
60
61protected:
62    CSSFontFaceSource();
63    virtual PassRefPtr<SimpleFontData> createFontData(const FontDescription&) = 0;
64
65    typedef HashMap<unsigned, RefPtr<SimpleFontData> > FontDataTable; // The hash key is composed of size synthetic styles.
66
67    RawPtrWillBeMember<CSSFontFace> m_face; // Our owning font face.
68    FontDataTable m_fontDataTable;
69};
70
71}
72
73#endif
74