FontCacheWx.cpp revision cad810f21b803229eb11403f9209855525a25d57 
1/*
2 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "FontCache.h"
31#include "Font.h"
32#include "FontPlatformData.h"
33#include "NotImplemented.h"
34#include "SimpleFontData.h"
35
36namespace WebCore {
37
38void FontCache::platformInit()
39{
40}
41
42const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
43{
44    SimpleFontData* fontData = 0;
45    fontData = getCachedFontData(font.fontDescription(), font.family().family());
46    if (!fontData->containsCharacters(characters, length))
47        fontData = getSimilarFontPlatformData(font);
48    if (!fontData->containsCharacters(characters, length))
49        fontData = getLastResortFallbackFont(font.fontDescription());
50
51    ASSERT(fontData);
52    return fontData;
53}
54
55SimpleFontData* FontCache::getSimilarFontPlatformData(const Font& font)
56{
57    SimpleFontData* simpleFontData = 0;
58#if OS(DARWIN)
59    // Attempt to find an appropriate font using a match based on
60    // the presence of keywords in the the requested names.  For example, we'll
61    // match any name that contains "Arabic" to Geeza Pro.
62    const FontFamily* currFamily = &font.fontDescription().family();
63    while (currFamily && !simpleFontData) {
64        if (currFamily->family().length()) {
65            static String* matchWords[3] = { new String("Arabic"), new String("Pashto"), new String("Urdu") };
66            DEFINE_STATIC_LOCAL(AtomicString, geezaStr, ("Geeza Pro"));
67            for (int j = 0; j < 3 && !simpleFontData; ++j)
68                if (currFamily->family().contains(*matchWords[j], false))
69                    simpleFontData = getCachedFontData(font.fontDescription(), geezaStr);
70        }
71        currFamily = currFamily->next();
72    }
73#endif
74    if (!simpleFontData)
75        simpleFontData = getCachedFontData(font.fontDescription(), font.family().family());
76
77    return simpleFontData;
78}
79
80SimpleFontData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
81{
82    // FIXME: Would be even better to somehow get the user's default font here.  For now we'll pick
83    // the default that the user would get without changing any prefs.
84    SimpleFontData* fallback = 0;
85#if OS(WINDOWS)
86    static AtomicString fallbackName("Arial Unicode MS");
87#else
88    static AtomicString fallbackName("Times New Roman");
89#endif
90    fallback = getCachedFontData(fontDescription, fallbackName);
91    ASSERT(fallback);
92
93    return fallback;
94}
95
96FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
97{
98    return new FontPlatformData(fontDescription,family);
99}
100
101void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
102{
103    notImplemented();
104}
105
106}
107