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      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 
     36 namespace WebCore {
     37 
     38 void FontCache::platformInit()
     39 {
     40 }
     41 
     42 const 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 
     55 SimpleFontData* 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 
     80 SimpleFontData* 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 
     96 FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
     97 {
     98     return new FontPlatformData(fontDescription,family);
     99 }
    100 
    101 void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
    102 {
    103     notImplemented();
    104 }
    105 
    106 }
    107