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      1 /*
      2  * Copyright (C) 2006 Kevin Ollivier  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  *
      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  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef FontPlatformData_h
     30 #define FontPlatformData_h
     31 
     32 #include "FontDescription.h"
     33 #include "FontWidthVariant.h"
     34 #include "FontOrientation.h"
     35 #include "StringImpl.h"
     36 #include <wtf/Forward.h>
     37 #include <wtf/RefPtr.h>
     38 #include <wtf/text/AtomicString.h>
     39 #include <wtf/text/CString.h>
     40 
     41 #include <wx/defs.h>
     42 #include <wx/font.h>
     43 #include <wx/gdicmn.h>
     44 
     45 #if OS(DARWIN)
     46 #include <ApplicationServices/ApplicationServices.h>
     47 
     48 #if __OBJC__
     49 @class NSFont;
     50 #else
     51 class NSFont;
     52 #endif
     53 
     54 #ifndef BUILDING_ON_TIGER
     55 inline CTFontRef toCTFontRef(NSFont *nsFont) { return reinterpret_cast<CTFontRef>(nsFont); }
     56 #endif
     57 
     58 #endif
     59 
     60 namespace WebCore {
     61 
     62 class FontHolder: public WTF::RefCounted<FontHolder>
     63 {
     64 public:
     65     FontHolder()
     66         : m_font(0)
     67     {}
     68 
     69     FontHolder(wxFont* font)
     70         : m_font(font)
     71     {}
     72 
     73     wxFont* font() { return m_font; }
     74 
     75 private:
     76     wxFont* m_font;
     77 };
     78 
     79 class FontPlatformData {
     80 public:
     81     enum FontState { UNINITIALIZED, DELETED, VALID };
     82 
     83     FontPlatformData(WTF::HashTableDeletedValueType)
     84     : m_fontState(DELETED)
     85     , m_font(0)
     86     , m_size(0)
     87 #if OS(DARWIN)
     88     , m_atsuFontID(0)
     89 #endif
     90     { }
     91 
     92     ~FontPlatformData();
     93 
     94     FontPlatformData(const FontDescription&, const AtomicString&);
     95 
     96     FontPlatformData(float size, bool bold, bool italic)
     97     : m_fontState(UNINITIALIZED)
     98     , m_font(0)
     99     , m_size(size)
    100 #if OS(DARWIN)
    101     , m_atsuFontID(0)
    102 #endif
    103     {
    104     }
    105 
    106     FontPlatformData()
    107     : m_fontState(UNINITIALIZED)
    108     , m_font(0)
    109     , m_size(0)
    110 #if OS(DARWIN)
    111     , m_atsuFontID(0)
    112 #endif
    113     {
    114     }
    115 
    116     wxFont* font() const {
    117         return m_font->font();
    118     }
    119 
    120     unsigned hash() const {
    121         switch (m_fontState) {
    122         case DELETED:
    123             return -1;
    124         case UNINITIALIZED:
    125             return 0;
    126         case VALID:
    127             return computeHash();
    128         }
    129     }
    130 
    131     unsigned computeHash() const;
    132 
    133     float size() const { return m_size; }
    134 
    135     bool operator==(const FontPlatformData& other) const
    136     {
    137         if (m_font && m_fontState == VALID && other.m_fontState == VALID && other.m_font) {
    138             wxFont* thisFont = m_font->font();
    139             wxFont* otherFont = other.m_font->font();
    140             return thisFont->IsOk() && otherFont->IsOk() && thisFont->IsSameAs(*otherFont);
    141         }
    142         else
    143             return m_fontState == other.m_fontState;
    144     }
    145 
    146     bool isHashTableDeletedValue() const { return m_fontState == DELETED; }
    147 
    148     bool roundsGlyphAdvances() const { return false; }
    149 
    150     bool allowsLigatures() const { return false; }
    151 
    152     FontOrientation orientation() const { return Horizontal; } // FIXME: Implement.
    153     void setOrientation(FontOrientation) { } // FIXME: Implement.
    154 
    155     // We don't support this yet, so just return the default value for now.
    156     FontWidthVariant widthVariant() const { return RegularWidth; }
    157 
    158 #if OS(WINDOWS)
    159     bool useGDI() const;
    160     HFONT hfont() const;
    161 #endif
    162 
    163 #if OS(DARWIN)
    164     ATSUFontID m_atsuFontID;
    165     CGFontRef cgFont() const;
    166     NSFont* nsFont() const { return m_nsFont; }
    167     CTFontRef ctFont() const { return reinterpret_cast<CTFontRef>(m_nsFont); }
    168     void cacheNSFont();
    169 #endif
    170 
    171     float m_size;
    172 
    173 #ifndef NDEBUG
    174     String description() const;
    175 #endif
    176 
    177 private:
    178     WTF::RefPtr<FontHolder> m_font;
    179     FontState m_fontState;
    180 #if OS(DARWIN)
    181     NSFont* m_nsFont;
    182 #endif
    183 };
    184 
    185 }
    186 
    187 #endif
    188