third_party/WebKit/Source/core/css/CSSFontSelector.h

   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 CSSFontSelector_h
  27 #define CSSFontSelector_h
  28
  29 #include "core/CoreExport.h"
  30 #include "core/css/FontFaceCache.h"
  31 #include "core/css/FontLoader.h"
  32 #include "platform/fonts/FontSelector.h"
  33 #include "platform/fonts/GenericFontFamilySettings.h"
  34 #include "platform/heap/Handle.h"
  35 #include "wtf/Forward.h"
  36 #include "wtf/HashMap.h"
  37 #include "wtf/HashSet.h"
  38
  39 namespace blink {
  40
  41 class CSSFontSelectorClient;
  42 class Document;
  43 class FontDescription;
  44
  45 class CORE_EXPORT CSSFontSelector : public FontSelector {
  46 public:
  47     static PassRefPtrWillBeRawPtr<CSSFontSelector> create(Document* document)
  48     {
  49         return adoptRefWillBeNoop(new CSSFontSelector(document));
  50     }
  51     ~CSSFontSelector() override;
  52
  53     unsigned version() const override { return m_fontFaceCache.version(); }
  54
  55     PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString&) override;
  56     void willUseFontData(const FontDescription&, const AtomicString& family, UChar32) override;
  57     bool isPlatformFontAvailable(const FontDescription&, const AtomicString& family);
  58
  59 #if !ENABLE(OILPAN)
  60     void clearDocument();
  61 #endif
  62
  63     void fontFaceInvalidated();
  64
  65     // FontCacheClient implementation
  66     void fontCacheInvalidated() override;
  67
  68     void registerForInvalidationCallbacks(CSSFontSelectorClient*);
  69 #if !ENABLE(OILPAN)
  70     void unregisterForInvalidationCallbacks(CSSFontSelectorClient*);
  71 #endif
  72
  73     Document* document() const { return m_document; }
  74     FontFaceCache* fontFaceCache() { return &m_fontFaceCache; }
  75     FontLoader* fontLoader() { return m_fontLoader.get(); }
  76
  77     const GenericFontFamilySettings& genericFontFamilySettings() const { return m_genericFontFamilySettings; }
  78     void updateGenericFontFamilySettings(Document&);
  79
  80     DECLARE_VIRTUAL_TRACE();
  81
  82 protected:
  83     explicit CSSFontSelector(Document*);
  84
  85     void dispatchInvalidationCallbacks();
  86
  87 private:
  88     // FIXME: Oilpan: Ideally this should just be a traced Member but that will
  89     // currently leak because ComputedStyle and its data are not on the heap.
  90     // See crbug.com/383860 for details.
  91     RawPtrWillBeWeakMember<Document> m_document;
  92     // FIXME: Move to Document or StyleEngine.
  93     FontFaceCache m_fontFaceCache;
  94     WillBeHeapHashSet<RawPtrWillBeWeakMember<CSSFontSelectorClient>> m_clients;
  95
  96     RefPtrWillBeMember<FontLoader> m_fontLoader;
  97     GenericFontFamilySettings m_genericFontFamilySettings;
  98 };
  99
 100 } // namespace blink
 101
 102 #endif // CSSFontSelector_h