1/*
2 * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2013 Google Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#ifndef FontFaceCache_h
28#define FontFaceCache_h
29
30#include "platform/heap/Handle.h"
31#include "wtf/Forward.h"
32#include "wtf/HashMap.h"
33#include "wtf/ListHashSet.h"
34#include "wtf/text/StringHash.h"
35
36namespace blink {
37
38class FontFace;
39class CSSFontSelector;
40class CSSSegmentedFontFace;
41class FontDescription;
42class StyleRuleFontFace;
43
44class FontFaceCache FINAL {
45    DISALLOW_ALLOCATION();
46public:
47    FontFaceCache();
48
49    // FIXME: Remove CSSFontSelector as argument. Passing CSSFontSelector here is
50    // a result of egregious spaghettification in FontFace/FontFaceSet.
51    void add(CSSFontSelector*, const StyleRuleFontFace*, PassRefPtrWillBeRawPtr<FontFace>);
52    void remove(const StyleRuleFontFace*);
53    void clearCSSConnected();
54    void clearAll();
55    void addFontFace(CSSFontSelector*, PassRefPtrWillBeRawPtr<FontFace>, bool cssConnected);
56    void removeFontFace(FontFace*, bool cssConnected);
57
58    // FIXME: It's sort of weird that add/remove uses StyleRuleFontFace* as key,
59    // but this function uses FontDescription/family pair.
60    CSSSegmentedFontFace* get(const FontDescription&, const AtomicString& family);
61
62    const WillBeHeapListHashSet<RefPtrWillBeMember<FontFace> >& cssConnectedFontFaces() const { return m_cssConnectedFontFaces; }
63
64    unsigned version() const { return m_version; }
65    void incrementVersion() { ++m_version; }
66
67    void trace(Visitor*);
68
69private:
70    typedef WillBeHeapHashMap<unsigned, RefPtrWillBeMember<CSSSegmentedFontFace> > TraitsMap;
71    typedef WillBeHeapHashMap<String, OwnPtrWillBeMember<TraitsMap>, CaseFoldingHash> FamilyToTraitsMap;
72    typedef WillBeHeapHashMap<const StyleRuleFontFace*, RefPtrWillBeMember<FontFace> > StyleRuleToFontFace;
73    FamilyToTraitsMap m_fontFaces;
74    FamilyToTraitsMap m_fonts;
75    StyleRuleToFontFace m_styleRuleToFontFace;
76    WillBeHeapListHashSet<RefPtrWillBeMember<FontFace> > m_cssConnectedFontFaces;
77
78    // FIXME: See if this could be ditched
79    // Used to compare Font instances, and the usage seems suspect.
80    unsigned m_version;
81};
82
83}
84
85#endif
86