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 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 CSSFontSelector_h
27#define CSSFontSelector_h
28
29#include "CachedResourceHandle.h"
30#include "FontSelector.h"
31#include "SimpleFontData.h"
32#include "Timer.h"
33#include <memory>
34#include <wtf/Forward.h>
35#include <wtf/HashMap.h>
36#include <wtf/HashSet.h>
37#include <wtf/RefPtr.h>
38#include <wtf/text/StringHash.h>
39
40namespace WebCore {
41
42class CSSFontFace;
43class CSSFontFaceRule;
44class CSSSegmentedFontFace;
45class CachedFont;
46class Document;
47class FontDescription;
48class StyleRuleFontFace;
49
50class CSSFontSelector final : public FontSelector {
51public:
52    static PassRefPtr<CSSFontSelector> create(Document* document)
53    {
54        return adoptRef(new CSSFontSelector(document));
55    }
56    virtual ~CSSFontSelector();
57
58    virtual unsigned version() const override { return m_version; }
59    virtual unsigned uniqueId() const override { return m_uniqueId; }
60
61    virtual PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString&) override;
62    virtual size_t fallbackFontDataCount() override;
63    virtual PassRefPtr<FontData> getFallbackFontData(const FontDescription&, size_t) override;
64    CSSSegmentedFontFace* getFontFace(const FontDescription&, const AtomicString& family);
65
66    virtual bool resolvesFamilyFor(const FontDescription&) const override;
67
68    void clearDocument();
69
70    void addFontFaceRule(const StyleRuleFontFace*);
71
72    void fontLoaded();
73    virtual void fontCacheInvalidated() override;
74
75    bool isEmpty() const;
76
77    virtual void registerForInvalidationCallbacks(FontSelectorClient*) override;
78    virtual void unregisterForInvalidationCallbacks(FontSelectorClient*) override;
79
80    Document* document() const { return m_document; }
81
82    void beginLoadingFontSoon(CachedFont*);
83
84private:
85    CSSFontSelector(Document*);
86
87    void dispatchInvalidationCallbacks();
88
89    void beginLoadTimerFired(Timer<CSSFontSelector>&);
90
91    Document* m_document;
92    HashMap<String, std::unique_ptr<Vector<RefPtr<CSSFontFace>>>, CaseFoldingHash> m_fontFaces;
93    HashMap<String, std::unique_ptr<Vector<RefPtr<CSSFontFace>>>, CaseFoldingHash> m_locallyInstalledFontFaces;
94    HashMap<String, std::unique_ptr<HashMap<unsigned, RefPtr<CSSSegmentedFontFace>>>, CaseFoldingHash> m_fonts;
95    HashSet<FontSelectorClient*> m_clients;
96
97    Vector<CachedResourceHandle<CachedFont>> m_fontsToBeginLoading;
98    Timer<CSSFontSelector> m_beginLoadingTimer;
99
100    unsigned m_uniqueId;
101    unsigned m_version;
102};
103
104} // namespace WebCore
105
106#endif // CSSFontSelector_h
107