1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
6 * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIother.m_  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USm_
22 *
23 */
24
25#ifndef FontDescription_h
26#define FontDescription_h
27
28#include "FontFamily.h"
29#include "FontRenderingMode.h"
30#include "FontSmoothingMode.h"
31#include "FontTraitsMask.h"
32#include "TextRenderingMode.h"
33
34namespace WebCore {
35
36enum FontWeight {
37    FontWeight100,
38    FontWeight200,
39    FontWeight300,
40    FontWeight400,
41    FontWeight500,
42    FontWeight600,
43    FontWeight700,
44    FontWeight800,
45    FontWeight900,
46    FontWeightNormal = FontWeight400,
47    FontWeightBold = FontWeight700
48};
49
50class FontDescription {
51public:
52    enum GenericFamilyType { NoFamily, StandardFamily, SerifFamily, SansSerifFamily,
53                             MonospaceFamily, CursiveFamily, FantasyFamily };
54
55    FontDescription()
56        : m_specifiedSize(0)
57        , m_computedSize(0)
58        , m_italic(false)
59        , m_smallCaps(false)
60        , m_isAbsoluteSize(false)
61        , m_weight(FontWeightNormal)
62        , m_genericFamily(NoFamily)
63        , m_usePrinterFont(false)
64        , m_renderingMode(NormalRenderingMode)
65        , m_keywordSize(0)
66        , m_fontSmoothing(AutoSmoothing)
67        , m_textRendering(AutoTextRendering)
68    {
69    }
70
71    bool operator==(const FontDescription&) const;
72    bool operator!=(const FontDescription& other) const { return !(*this == other); }
73
74    const FontFamily& family() const { return m_familyList; }
75    FontFamily& firstFamily() { return m_familyList; }
76    float specifiedSize() const { return m_specifiedSize; }
77    float computedSize() const { return m_computedSize; }
78    bool italic() const { return m_italic; }
79    int computedPixelSize() const { return int(m_computedSize + 0.5f); }
80    bool smallCaps() const { return m_smallCaps; }
81    bool isAbsoluteSize() const { return m_isAbsoluteSize; }
82    FontWeight weight() const { return static_cast<FontWeight>(m_weight); }
83    FontWeight lighterWeight() const;
84    FontWeight bolderWeight() const;
85    GenericFamilyType genericFamily() const { return static_cast<GenericFamilyType>(m_genericFamily); }
86    bool usePrinterFont() const { return m_usePrinterFont; }
87    // only use fixed default size when there is only one font family, and that family is "monospace"
88    bool useFixedDefaultSize() const { return genericFamily() == MonospaceFamily && !family().next() && family().family() == "-webkit-monospace"; }
89    FontRenderingMode renderingMode() const { return static_cast<FontRenderingMode>(m_renderingMode); }
90    unsigned keywordSize() const { return m_keywordSize; }
91    FontSmoothingMode fontSmoothing() const { return static_cast<FontSmoothingMode>(m_fontSmoothing); }
92    TextRenderingMode textRenderingMode() const { return static_cast<TextRenderingMode>(m_textRendering); }
93
94    FontTraitsMask traitsMask() const;
95
96    void setFamily(const FontFamily& family) { m_familyList = family; }
97    void setComputedSize(float s) { m_computedSize = s; }
98    void setSpecifiedSize(float s) { m_specifiedSize = s; }
99    void setItalic(bool i) { m_italic = i; }
100    void setSmallCaps(bool c) { m_smallCaps = c; }
101    void setIsAbsoluteSize(bool s) { m_isAbsoluteSize = s; }
102    void setWeight(FontWeight w) { m_weight = w; }
103    void setGenericFamily(GenericFamilyType genericFamily) { m_genericFamily = genericFamily; }
104    void setUsePrinterFont(bool p) { m_usePrinterFont = p; }
105    void setRenderingMode(FontRenderingMode mode) { m_renderingMode = mode; }
106    void setKeywordSize(unsigned s) { m_keywordSize = s; }
107    void setFontSmoothing(FontSmoothingMode smoothing) { m_fontSmoothing = smoothing; }
108    void setTextRenderingMode(TextRenderingMode rendering) { m_textRendering = rendering; }
109
110private:
111    FontFamily m_familyList; // The list of font families to be used.
112
113    float m_specifiedSize;   // Specified CSS value. Independent of rendering issues such as integer
114                             // rounding, minimum font sizes, and zooming.
115    float m_computedSize;    // Computed size adjusted for the minimum font size and the zoom factor.
116
117    bool m_italic : 1;
118    bool m_smallCaps : 1;
119    bool m_isAbsoluteSize : 1;   // Whether or not CSS specified an explicit size
120                                 // (logical sizes like "medium" don't count).
121    unsigned m_weight : 8; // FontWeight
122    unsigned m_genericFamily : 3; // GenericFamilyType
123    bool m_usePrinterFont : 1;
124
125    unsigned m_renderingMode : 1;  // Used to switch between CG and GDI text on Windows.
126
127    unsigned m_keywordSize : 4; // We cache whether or not a font is currently represented by a CSS keyword (e.g., medium).  If so,
128                           // then we can accurately translate across different generic families to adjust for different preference settings
129                           // (e.g., 13px monospace vs. 16px everything else).  Sizes are 1-8 (like the HTML size values for <font>).
130
131    unsigned m_fontSmoothing : 2; // FontSmoothingMode
132    unsigned m_textRendering : 2; // TextRenderingMode
133};
134
135inline bool FontDescription::operator==(const FontDescription& other) const
136{
137    return m_familyList == other.m_familyList
138        && m_specifiedSize == other.m_specifiedSize
139        && m_computedSize == other.m_computedSize
140        && m_italic == other.m_italic
141        && m_smallCaps == other.m_smallCaps
142        && m_isAbsoluteSize == other.m_isAbsoluteSize
143        && m_weight == other.m_weight
144        && m_genericFamily == other.m_genericFamily
145        && m_usePrinterFont == other.m_usePrinterFont
146        && m_renderingMode == other.m_renderingMode
147        && m_keywordSize == other.m_keywordSize
148        && m_fontSmoothing == other.m_fontSmoothing
149        && m_textRendering == other.m_textRendering;
150}
151
152}
153
154#endif
155