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-/*
- * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
- * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
- *
- * 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.
- */
-
-#import "config.h"
-#import "FontCache.h"
-
-#import "Font.h"
-#import "SimpleFontData.h"
-#import "FontPlatformData.h"
-#import "WebCoreSystemInterface.h"
-#import "WebFontCache.h"
-
-#ifdef BUILDING_ON_TIGER
-typedef int NSInteger;
-#endif
-
-namespace WebCore {
-
-static void fontCacheATSNotificationCallback(ATSFontNotificationInfoRef, void*)
-{
- FontCache::invalidate();
-}
-
-void FontCache::platformInit()
-{
- wkSetUpFontCache();
- // FIXME: Passing kATSFontNotifyOptionReceiveWhileSuspended may be an overkill and does not seem to work anyway.
- ATSFontNotificationSubscribe(fontCacheATSNotificationCallback, kATSFontNotifyOptionReceiveWhileSuspended, 0, 0);
-}
-
-static int toAppKitFontWeight(FontWeight fontWeight)
-{
- static int appKitFontWeights[] = {
- 2, // FontWeight100
- 3, // FontWeight200
- 4, // FontWeight300
- 5, // FontWeight400
- 6, // FontWeight500
- 8, // FontWeight600
- 9, // FontWeight700
- 10, // FontWeight800
- 12, // FontWeight900
- };
- return appKitFontWeights[fontWeight];
-}
-
-static inline bool isAppKitFontWeightBold(NSInteger appKitFontWeight)
-{
- return appKitFontWeight >= 7;
-}
-
-const SimpleFontData* FontCache::getFontDataForCharacters(const Font& font, const UChar* characters, int length)
-{
- const FontPlatformData& platformData = font.fontDataAt(0)->fontDataForCharacter(characters[0])->platformData();
- NSFont *nsFont = platformData.font();
-
- NSString *string = [[NSString alloc] initWithCharactersNoCopy:const_cast<UChar*>(characters) length:length freeWhenDone:NO];
- NSFont *substituteFont = wkGetFontInLanguageForRange(nsFont, string, NSMakeRange(0, length));
- [string release];
-
- if (!substituteFont && length == 1)
- substituteFont = wkGetFontInLanguageForCharacter(nsFont, characters[0]);
- if (!substituteFont)
- return 0;
-
- // Use the family name from the AppKit-supplied substitute font, requesting the
- // traits, weight, and size we want. One way this does better than the original
- // AppKit request is that it takes synthetic bold and oblique into account.
- // But it does create the possibility that we could end up with a font that
- // doesn't actually cover the characters we need.
-
- NSFontManager *fontManager = [NSFontManager sharedFontManager];
-
- NSFontTraitMask traits;
- NSInteger weight;
- CGFloat size;
-
- if (nsFont) {
- traits = [fontManager traitsOfFont:nsFont];
- if (platformData.m_syntheticBold)
- traits |= NSBoldFontMask;
- if (platformData.m_syntheticOblique)
- traits |= NSFontItalicTrait;
- weight = [fontManager weightOfFont:nsFont];
- size = [nsFont pointSize];
- } else {
- // For custom fonts nsFont is nil.
- traits = font.italic() ? NSFontItalicTrait : 0;
- weight = toAppKitFontWeight(font.weight());
- size = font.pixelSize();
- }
-
- if (NSFont *bestVariation = [fontManager fontWithFamily:[substituteFont familyName] traits:traits weight:weight size:size])
- substituteFont = bestVariation;
-
- substituteFont = font.fontDescription().usePrinterFont() ? [substituteFont printerFont] : [substituteFont screenFont];
-
- NSFontTraitMask substituteFontTraits = [fontManager traitsOfFont:substituteFont];
- NSInteger substituteFontWeight = [fontManager weightOfFont:substituteFont];
-
- FontPlatformData alternateFont(substituteFont,
- !font.isPlatformFont() && isAppKitFontWeightBold(weight) && !isAppKitFontWeightBold(substituteFontWeight),
- !font.isPlatformFont() && (traits & NSFontItalicTrait) && !(substituteFontTraits & NSFontItalicTrait));
- return getCachedFontData(&alternateFont);
-}
-
-FontPlatformData* FontCache::getSimilarFontPlatformData(const Font& font)
-{
- // 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.
- FontPlatformData* platformData = 0;
- const FontFamily* currFamily = &font.fontDescription().family();
- while (currFamily && !platformData) {
- if (currFamily->family().length()) {
- static String matchWords[3] = { String("Arabic"), String("Pashto"), String("Urdu") };
- static AtomicString geezaStr("Geeza Pro");
- for (int j = 0; j < 3 && !platformData; ++j)
- if (currFamily->family().contains(matchWords[j], false))
- platformData = getCachedFontPlatformData(font.fontDescription(), geezaStr);
- }
- currFamily = currFamily->next();
- }
-
- return platformData;
-}
-
-FontPlatformData* FontCache::getLastResortFallbackFont(const FontDescription& fontDescription)
-{
- static AtomicString timesStr("Times");
- static AtomicString lucidaGrandeStr("Lucida Grande");
-
- // 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.
- FontPlatformData* platformFont = getCachedFontPlatformData(fontDescription, timesStr);
- if (!platformFont)
- // The Times fallback will almost always work, but in the highly unusual case where
- // the user doesn't have it, we fall back on Lucida Grande because that's
- // guaranteed to be there, according to Nathan Taylor. This is good enough
- // to avoid a crash at least.
- platformFont = getCachedFontPlatformData(fontDescription, lucidaGrandeStr);
-
- return platformFont;
-}
-
-void FontCache::getTraitsInFamily(const AtomicString& familyName, Vector<unsigned>& traitsMasks)
-{
- [WebFontCache getTraits:traitsMasks inFamily:familyName];
-}
-
-FontPlatformData* FontCache::createFontPlatformData(const FontDescription& fontDescription, const AtomicString& family)
-{
- NSFontTraitMask traits = fontDescription.italic() ? NSFontItalicTrait : 0;
- NSInteger weight = toAppKitFontWeight(fontDescription.weight());
- float size = fontDescription.computedPixelSize();
-
- NSFont *nsFont = [WebFontCache fontWithFamily:family traits:traits weight:weight size:size];
- if (!nsFont)
- return 0;
-
- NSFontManager *fontManager = [NSFontManager sharedFontManager];
- NSFontTraitMask actualTraits = 0;
- if (fontDescription.italic())
- actualTraits = [fontManager traitsOfFont:nsFont];
- NSInteger actualWeight = [fontManager weightOfFont:nsFont];
-
- FontPlatformData* result = new FontPlatformData;
-
- // Use the correct font for print vs. screen.
- result->setFont(fontDescription.usePrinterFont() ? [nsFont printerFont] : [nsFont screenFont]);
- result->m_syntheticBold = isAppKitFontWeightBold(weight) && !isAppKitFontWeightBold(actualWeight);
- result->m_syntheticOblique = (traits & NSFontItalicTrait) && !(actualTraits & NSFontItalicTrait);
- return result;
-}
-
-} // namespace WebCore
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