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      1 /*
      2  * Copyright (C) 2006 Apple Computer, 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  *
      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 #include "config.h"
     30 #include "SimpleFontData.h"
     31 
     32 #include "FontCache.h"
     33 #include "FloatRect.h"
     34 #include "FontDescription.h"
     35 #include <wtf/MathExtras.h>
     36 #include <unicode/uchar.h>
     37 #include <unicode/unorm.h>
     38 
     39 #include <wx/defs.h>
     40 #include <wx/dcscreen.h>
     41 #include "fontprops.h"
     42 
     43 namespace WebCore
     44 {
     45 
     46 void SimpleFontData::platformInit()
     47 {
     48     wxFont *font = m_platformData.font();
     49     if (font && font->IsOk()) {
     50         wxFontProperties props = wxFontProperties(font);
     51         m_ascent = props.GetAscent();
     52         m_descent = props.GetDescent();
     53         m_lineSpacing = props.GetLineSpacing();
     54         m_xHeight = props.GetXHeight();
     55         m_unitsPerEm = 1; // FIXME!
     56         m_lineGap = props.GetLineGap();
     57     }
     58 
     59 #if OS(WINDOWS)
     60     m_scriptCache = 0;
     61     m_scriptFontProperties = 0;
     62     m_isSystemFont = false;
     63     m_syntheticBoldOffset = 0.0f;
     64 #endif
     65 }
     66 
     67 void SimpleFontData::platformCharWidthInit()
     68 {
     69     m_avgCharWidth = 0.f;
     70     m_maxCharWidth = 0.f;
     71     initCharWidths();
     72 }
     73 
     74 void SimpleFontData::platformDestroy()
     75 {
     76     delete m_smallCapsFontData;
     77     m_smallCapsFontData = 0;
     78 
     79 #if OS(WINDOWS)
     80     if (m_scriptFontProperties) {
     81         delete m_scriptFontProperties;
     82         m_scriptFontProperties = 0;
     83     }
     84 
     85     if (m_scriptCache)
     86         ScriptFreeCache(&m_scriptCache);
     87 #endif
     88 }
     89 
     90 SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
     91 {
     92     if (!m_smallCapsFontData){
     93         FontDescription desc = FontDescription(fontDescription);
     94         desc.setSpecifiedSize(0.70f*fontDescription.computedSize());
     95         const FontPlatformData* pdata = new FontPlatformData(desc, desc.family().family());
     96         m_smallCapsFontData = new SimpleFontData(*pdata);
     97     }
     98     return m_smallCapsFontData;
     99 }
    100 
    101 bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
    102 {
    103     // FIXME: We will need to implement this to load non-ASCII encoding sites
    104     return wxFontContainsCharacters(*m_platformData.font(), characters, length);
    105 }
    106 
    107 void SimpleFontData::determinePitch()
    108 {
    109     if (m_platformData.font() && m_platformData.font()->Ok())
    110         m_treatAsFixedPitch = m_platformData.font()->IsFixedWidth();
    111     else
    112         m_treatAsFixedPitch = false;
    113 }
    114 
    115 float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
    116 {
    117 #if __WXMSW__
    118     // under Windows / wxMSW we currently always use GDI fonts.
    119     return widthForGDIGlyph(glyph);
    120 #else
    121     // TODO: fix this! Make GetTextExtents a method of wxFont in 2.9
    122     int width = 10;
    123     GetTextExtent(*m_platformData.font(), (wxChar)glyph, &width, NULL);
    124     return width;
    125 #endif
    126 }
    127 
    128 #if OS(WINDOWS)
    129 SCRIPT_FONTPROPERTIES* SimpleFontData::scriptFontProperties() const
    130 {
    131     // AFAICT this is never called even by the Win port anymore.
    132     return 0;
    133 }
    134 
    135 void SimpleFontData::initGDIFont()
    136 {
    137     // unused by wx port
    138 }
    139 
    140 void SimpleFontData::platformCommonDestroy()
    141 {
    142     // unused by wx port
    143 }
    144 
    145 float SimpleFontData::widthForGDIGlyph(Glyph glyph) const
    146 {
    147     HDC hdc = GetDC(0);
    148     HGDIOBJ oldFont = SelectObject(hdc, m_platformData.hfont());
    149     int width;
    150     GetCharWidthI(hdc, glyph, 1, 0, &width);
    151     SelectObject(hdc, oldFont);
    152     ReleaseDC(0, hdc);
    153     return width;
    154 }
    155 #endif
    156 
    157 }
    158