Home | History | Annotate | Download | only in wx 
      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 "AtomicString.h"
     34 #include "CString.h"
     35 #include "StringImpl.h"
     36 #include <wtf/RefPtr.h>
     37 
     38 #include <wx/defs.h>
     39 #include <wx/font.h>
     40 
     41 namespace WebCore {
     42 
     43 class String;
     44 
     45 class FontHolder: public WTF::RefCounted<FontHolder>
     46 {
     47 public:
     48     FontHolder()
     49         : m_font(0)
     50     {}
     51 
     52     FontHolder(wxFont* font)
     53         : m_font(font)
     54     {}
     55 
     56     wxFont* font() { return m_font; }
     57 
     58 private:
     59     wxFont* m_font;
     60 };
     61 
     62 class FontPlatformData {
     63 public:
     64     enum FontState { UNINITIALIZED, DELETED, VALID };
     65 
     66     FontPlatformData(WTF::HashTableDeletedValueType)
     67     : m_fontState(DELETED),
     68       m_font(0)
     69     { }
     70 
     71     ~FontPlatformData();
     72 
     73     FontPlatformData(const FontDescription&, const AtomicString&);
     74     FontPlatformData(float size, bool bold, bool italic)
     75     : m_fontState(UNINITIALIZED)
     76     , m_font(0)
     77     {
     78     }
     79 
     80     FontPlatformData()
     81     : m_fontState(UNINITIALIZED)
     82     , m_font(0)
     83     {
     84     }
     85 
     86     wxFont* font() const {
     87         return m_font->font();
     88     }
     89 
     90     unsigned hash() const {
     91         switch (m_fontState) {
     92         case DELETED:
     93             return -1;
     94         case UNINITIALIZED:
     95             return 0;
     96         case VALID:
     97             return computeHash();
     98         }
     99     }
    100 
    101     unsigned computeHash() const;
    102 
    103     bool operator==(const FontPlatformData& other) const
    104     {
    105         if (m_font && m_fontState == VALID && other.m_fontState == VALID && other.m_font) {
    106             wxFont* thisFont = m_font->font();
    107             wxFont* otherFont = other.m_font->font();
    108             return thisFont->IsOk() && otherFont->IsOk() && thisFont->IsSameAs(*otherFont);
    109         }
    110         else
    111             return m_fontState == other.m_fontState;
    112     }
    113 
    114     bool isHashTableDeletedValue() const { return m_fontState == DELETED; }
    115 
    116     bool roundsGlyphAdvances() const { return false; }
    117 
    118 #if OS(WINDOWS)
    119     bool useGDI() const;
    120     HFONT hfont() const;
    121 #endif
    122 
    123 #ifndef NDEBUG
    124     String description() const;
    125 #endif
    126 
    127 private:
    128     WTF::RefPtr<FontHolder> m_font;
    129     FontState m_fontState;
    130 };
    131 
    132 }
    133 
    134 #endif
    135