/*
 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer. 
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution. 
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "FontCache.h"
#include "Font.h"
#include "FontPlatformData.h"
#include "NotImplemented.h"
#include "SimpleFontData.h"
#include <wtf/text/WTFString.h>

#include <wx/defs.h>
#include <wx/fontenum.h>

namespace WebCore {

void FontCache::platformInit()
{
}

PassRefPtr<SimpleFontData> FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
{
    RefPtr<SimpleFontData> fontData = 0;
    fontData = getCachedFontData(font.fontDescription(), font.family().family(), false, DoNotRetain);
    if (!fontData->containsCharacters(characters, length))
        fontData = getSimilarFontPlatformData(font);
    if (!fontData->containsCharacters(characters, length))
        fontData = getLastResortFallbackFont(font.fontDescription());

    ASSERT(fontData);
    return fontData.release();
}

PassRefPtr<SimpleFontData> FontCache::getSimilarFontPlatformData(const Font& font)
{
    RefPtr<SimpleFontData> simpleFontData = 0;
#if OS(DARWIN)
    // Attempt to find an appropriate font using a match based on 
    // the presence of keywords in the the requested names.  For example, we'll
    // match any name that contains "Arabic" to Geeza Pro.
    const FontFamily* currFamily = &font.fontDescription().family();
    while (currFamily && !simpleFontData) {
        if (currFamily->family().length()) {
            static String* matchWords[3] = { new String("Arabic"), new String("Pashto"), new String("Urdu") };
            DEFINE_STATIC_LOCAL(AtomicString, geezaStr, ("Geeza Pro", AtomicString::ConstructFromLiteral));
            for (int j = 0; j < 3 && !simpleFontData; ++j)
                if (currFamily->family().contains(*matchWords[j], false))
                    simpleFontData = getCachedFontData(font.fontDescription(), geezaStr);
        }
        currFamily = currFamily->next();
    }
#endif
    if (!simpleFontData)
        simpleFontData = getCachedFontData(font.fontDescription(), font.family().family());

    return simpleFontData.release();
}

PassRefPtr<SimpleFontData> FontCache::getLastResortFallbackFont(const FontDescription& fontDescription, ShouldRetain shouldRetain)
{
    // FIXME: Would be even better to somehow get the user's default font here.  For now we'll pick
    // the default that the user would get without changing any prefs.
    RefPtr<SimpleFontData> fallback = 0;
#if OS(WINDOWS)
    static AtomicString fallbackName("Arial Unicode MS");
#else
    static AtomicString fallbackName("Times New Roman");
#endif
    fallback = getCachedFontData(fontDescription, fallbackName, false, shouldRetain);
    ASSERT(fallback);
    
    return fallback.release();
}

FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
{
    // wx will ALWAYS create a valid font, even if the font family we're looking for is not available.
    // So we check to make sure the font is the one we're looking for before creating the font.
    if (!wxFontEnumerator::IsValidFacename(family.string()))
        return 0;

    return new FontPlatformData(fontDescription,family);
}

void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
{
    notImplemented();
}

}
