third_party/WebKit/Source/platform/fonts/AlternateFontFamily.h

   1 /*
   2  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
   3  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
   4  * Copyright (C) 2013 Google, Inc. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1.  Redistributions of source code must retain the above copyright
  11  *     notice, this list of conditions and the following disclaimer.
  12  * 2.  Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in the
  14  *     documentation and/or other materials provided with the distribution.
  15  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  16  *     its contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #ifndef AlternateFontFamily_h
  32 #define AlternateFontFamily_h
  33
  34 #include "platform/fonts/FontDescription.h"
  35 #include "wtf/text/AtomicString.h"
  36
  37 namespace blink {
  38
  39 // We currently do not support bitmap fonts on windows.
  40 // Instead of trying to construct a bitmap font and then going down the fallback path map
  41 // certain common bitmap fonts to their truetype equivalent up front.
  42 inline const AtomicString& adjustFamilyNameToAvoidUnsupportedFonts(const AtomicString& familyName)
  43 {
  44 #if OS(WIN)
  45     // On Windows, 'Courier New' (truetype font) is always present and
  46     // 'Courier' is a bitmap font. On Mac on the other hand 'Courier' is
  47     // a truetype font. Thus pages asking for Courier are better of
  48     // using 'Courier New' on windows.
  49     DEFINE_STATIC_LOCAL(AtomicString, courier, ("Courier", AtomicString::ConstructFromLiteral));
  50     DEFINE_STATIC_LOCAL(AtomicString, courierNew, ("Courier New", AtomicString::ConstructFromLiteral));
  51     if (equalIgnoringCase(familyName, courier))
  52         return courierNew;
  53
  54     // Alias 'MS Sans Serif' (bitmap font) -> 'Microsoft Sans Serif'
  55     // (truetype font).
  56     DEFINE_STATIC_LOCAL(AtomicString, msSans, ("MS Sans Serif", AtomicString::ConstructFromLiteral));
  57     DEFINE_STATIC_LOCAL(AtomicString, microsoftSans, ("Microsoft Sans Serif", AtomicString::ConstructFromLiteral));
  58     if (equalIgnoringCase(familyName, msSans))
  59         return microsoftSans;
  60
  61     // Alias 'MS Serif' (bitmap) -> 'Times New Roman' (truetype font).
  62     // Alias 'Times' -> 'Times New Roman' (truetype font).
  63     // There's no 'Microsoft Sans Serif-equivalent' for Serif.
  64     DEFINE_STATIC_LOCAL(AtomicString, msSerif, ("MS Serif", AtomicString::ConstructFromLiteral));
  65     DEFINE_STATIC_LOCAL(AtomicString, times, ("Times", AtomicString::ConstructFromLiteral));
  66     DEFINE_STATIC_LOCAL(AtomicString, timesNewRoman, ("Times New Roman", AtomicString::ConstructFromLiteral));
  67     if (equalIgnoringCase(familyName, msSerif) || equalIgnoringCase(familyName, times))
  68         return timesNewRoman;
  69 #endif
  70
  71     return familyName;
  72 }
  73
  74 inline const AtomicString& alternateFamilyName(const AtomicString& familyName)
  75 {
  76     // Alias Courier <-> Courier New
  77     DEFINE_STATIC_LOCAL(AtomicString, courier, ("Courier", AtomicString::ConstructFromLiteral));
  78     DEFINE_STATIC_LOCAL(AtomicString, courierNew, ("Courier New", AtomicString::ConstructFromLiteral));
  79     if (equalIgnoringCase(familyName, courier))
  80         return courierNew;
  81 #if !OS(WIN)
  82     // On Windows, Courier New (truetype font) is always present and
  83     // Courier is a bitmap font. So, we don't want to map Courier New to
  84     // Courier.
  85     if (equalIgnoringCase(familyName, courierNew))
  86         return courier;
  87 #endif
  88
  89     // Alias Times and Times New Roman.
  90     DEFINE_STATIC_LOCAL(AtomicString, times, ("Times", AtomicString::ConstructFromLiteral));
  91     DEFINE_STATIC_LOCAL(AtomicString, timesNewRoman, ("Times New Roman", AtomicString::ConstructFromLiteral));
  92     if (equalIgnoringCase(familyName, times))
  93         return timesNewRoman;
  94     if (equalIgnoringCase(familyName, timesNewRoman))
  95         return times;
  96
  97     // Alias Arial and Helvetica
  98     DEFINE_STATIC_LOCAL(AtomicString, arial, ("Arial", AtomicString::ConstructFromLiteral));
  99     DEFINE_STATIC_LOCAL(AtomicString, helvetica, ("Helvetica", AtomicString::ConstructFromLiteral));
 100     if (equalIgnoringCase(familyName, arial))
 101         return helvetica;
 102     if (equalIgnoringCase(familyName, helvetica))
 103         return arial;
 104
 105     return emptyAtom;
 106 }
 107
 108
 109 inline const AtomicString getFallbackFontFamily(const FontDescription& description)
 110 {
 111     DEFINE_STATIC_LOCAL(const AtomicString, sansStr, ("sans-serif", AtomicString::ConstructFromLiteral));
 112     DEFINE_STATIC_LOCAL(const AtomicString, serifStr, ("serif", AtomicString::ConstructFromLiteral));
 113     DEFINE_STATIC_LOCAL(const AtomicString, monospaceStr, ("monospace", AtomicString::ConstructFromLiteral));
 114     DEFINE_STATIC_LOCAL(const AtomicString, cursiveStr, ("cursive", AtomicString::ConstructFromLiteral));
 115     DEFINE_STATIC_LOCAL(const AtomicString, fantasyStr, ("fantasy", AtomicString::ConstructFromLiteral));
 116
 117     switch (description.genericFamily()) {
 118     case FontDescription::SansSerifFamily:
 119         return sansStr;
 120     case FontDescription::SerifFamily:
 121         return serifStr;
 122     case FontDescription::MonospaceFamily:
 123         return monospaceStr;
 124     case FontDescription::CursiveFamily:
 125         return cursiveStr;
 126     case FontDescription::FantasyFamily:
 127         return fantasyStr;
 128     default:
 129         // Let the caller use the system default font.
 130         return emptyAtom;
 131     }
 132 }
 133
 134 } // namespace blink
 135
 136 #endif // AlternateFontFamily_h