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#if OS(DARWIN)
40#include "WebCoreSystemInterface.h"
41#endif
42
43#include <wx/defs.h>
44#include <wx/dcscreen.h>
45#include <wx/string.h>
46#include "fontprops.h"
47
48namespace WebCore
49{
50
51void SimpleFontData::platformInit()
52{
53    wxFont *font = m_platformData.font();
54    if (font && font->IsOk()) {
55        wxFontProperties props = wxFontProperties(font);
56        m_fontMetrics.setAscent(props.GetAscent());
57        m_fontMetrics.setDescent(props.GetDescent());
58        m_fontMetrics.setXHeight(props.GetXHeight());
59        m_fontMetrics.setUnitsPerEm(1); // FIXME!
60        m_fontMetrics.setLineGap(props.GetLineGap());
61        m_fontMetrics.setLineSpacing(props.GetLineSpacing());
62    }
63
64    m_syntheticBoldOffset = 0.0f;
65
66#if OS(WINDOWS)
67    m_scriptCache = 0;
68    m_scriptFontProperties = 0;
69    m_isSystemFont = false;
70#endif
71}
72
73void SimpleFontData::platformCharWidthInit()
74{
75    m_avgCharWidth = 0.f;
76    m_maxCharWidth = 0.f;
77    initCharWidths();
78}
79
80void SimpleFontData::platformDestroy()
81{
82#if OS(WINDOWS)
83    if (m_scriptFontProperties) {
84        delete m_scriptFontProperties;
85        m_scriptFontProperties = 0;
86    }
87
88    if (m_scriptCache)
89        ScriptFreeCache(&m_scriptCache);
90#endif
91}
92
93SimpleFontData* SimpleFontData::scaledFontData(const FontDescription& fontDescription, float scaleFactor) const
94{
95    FontDescription desc = FontDescription(fontDescription);
96    desc.setSpecifiedSize(scaleFactor * fontDescription.computedSize());
97    FontPlatformData platformData(desc, desc.family().family());
98    return new SimpleFontData(platformData, isCustomFont(), false);
99}
100
101SimpleFontData* SimpleFontData::smallCapsFontData(const FontDescription& fontDescription) const
102{
103    if (!m_derivedFontData)
104        m_derivedFontData = DerivedFontData::create(isCustomFont());
105    if (!m_derivedFontData->smallCaps)
106        m_derivedFontData->smallCaps = scaledFontData(fontDescription, .7);
107
108    return m_derivedFontData->smallCaps.get();
109}
110
111SimpleFontData* SimpleFontData::emphasisMarkFontData(const FontDescription& fontDescription) const
112{
113    if (!m_derivedFontData)
114        m_derivedFontData = DerivedFontData::create(isCustomFont());
115    if (!m_derivedFontData->emphasisMark)
116        m_derivedFontData->emphasisMark = scaledFontData(fontDescription, .5);
117
118    return m_derivedFontData->emphasisMark.get();
119}
120
121bool SimpleFontData::containsCharacters(const UChar* characters, int length) const
122{
123    // FIXME: We will need to implement this to load non-ASCII encoding sites
124#if OS(WINDOWS)
125    return wxFontContainsCharacters(m_platformData.hfont(), characters, length);
126#elif OS(DARWIN)
127    return wxFontContainsCharacters(m_platformData.nsFont(), characters, length);
128#endif
129    return true;
130}
131
132void SimpleFontData::determinePitch()
133{
134    if (m_platformData.font() && m_platformData.font()->Ok())
135        m_treatAsFixedPitch = m_platformData.font()->IsFixedWidth();
136    else
137        m_treatAsFixedPitch = false;
138}
139
140FloatRect SimpleFontData::platformBoundsForGlyph(Glyph) const
141{
142    return FloatRect();
143}
144
145float SimpleFontData::platformWidthForGlyph(Glyph glyph) const
146{
147#if __WXMSW__
148    // under Windows / wxMSW we currently always use GDI fonts.
149    return widthForGDIGlyph(glyph);
150#elif OS(DARWIN)
151    float pointSize = m_platformData.size();
152    CGAffineTransform m = CGAffineTransformMakeScale(pointSize, pointSize);
153    CGSize advance;
154    NSFont* nsfont = (NSFont*)m_platformData.nsFont();
155    if (!wkGetGlyphTransformedAdvances(m_platformData.cgFont(), nsfont, &m, &glyph, &advance)) {
156        // LOG_ERROR("Unable to cache glyph widths for %@ %f", [nsfont displayName], pointSize);
157        advance.width = 0;
158    }
159    return advance.width + m_syntheticBoldOffset;
160#else
161    // TODO: fix this! Make GetTextExtents a method of wxFont in 2.9
162    int width = 10;
163    GetTextExtent(*m_platformData.font(), (wxChar)glyph, &width, NULL);
164    return width;
165#endif
166}
167
168#if OS(WINDOWS)
169SCRIPT_FONTPROPERTIES* SimpleFontData::scriptFontProperties() const
170{
171    // AFAICT this is never called even by the Win port anymore.
172    return 0;
173}
174
175void SimpleFontData::initGDIFont()
176{
177    // unused by wx port
178}
179
180void SimpleFontData::platformCommonDestroy()
181{
182    // unused by wx port
183}
184
185float SimpleFontData::widthForGDIGlyph(Glyph glyph) const
186{
187    HDC hdc = GetDC(0);
188    HGDIOBJ oldFont = SelectObject(hdc, m_platformData.hfont());
189    int width;
190    GetCharWidthI(hdc, glyph, 1, 0, &width);
191    SelectObject(hdc, oldFont);
192    ReleaseDC(0, hdc);
193    return width;
194}
195#endif
196
197}
198