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
37namespace 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.
42inline 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
74inline 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
109inline 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