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      1 /*
      2  * Copyright (C) 2000 Lars Knoll (knoll (at) kde.org)
      3  *           (C) 2000 Antti Koivisto (koivisto (at) kde.org)
      4  *           (C) 2000 Dirk Mueller (mueller (at) kde.org)
      5  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
      6  * Copyright (C) 2007 Nicholas Shanks <webkit (at) 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 
     34 namespace WebCore {
     35 
     36 enum 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 
     50 class FontDescription {
     51 public:
     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 
    110 private:
    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 
    135 inline 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