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      1 /*
      2  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
      3  * Copyright (C) 2007 Nicholas Shanks <webkit (at) 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
    137