JDK14/Java14源码在线阅读
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*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package sun.font;
import java.util.Locale;
import sun.awt.SunHints;
import sun.awt.SunToolkit;
import sun.util.logging.PlatformLogger;
/**
* Small utility class to manage FontConfig.
*/
public class FontConfigManager {
static boolean fontConfigFailed = false;
/* This is populated by native */
private static final FontConfigInfo fcInfo = new FontConfigInfo();
/* Begin support for GTK Look and Feel - query libfontconfig and
* return a composite Font to Swing that uses the desktop font(s).
*/
/* These next three classes are just data structures.
*/
public static class FontConfigFont {
public String familyName; // eg Bitstream Vera Sans
public String styleStr; // eg Bold
public String fullName; // eg Bitstream Vera Sans Bold
public String fontFile; // eg /usr/X11/lib/fonts/foo.ttf
}
public static class FcCompFont {
public String fcName; // eg sans
public String fcFamily; // eg sans
public String jdkName; // eg sansserif
public int style; // eg 0=PLAIN
public FontConfigFont firstFont;
public FontConfigFont[] allFonts;
//boolean preferBitmaps; // if embedded bitmaps preferred over AA
public CompositeFont compFont; // null if not yet created/known.
}
public static class FontConfigInfo {
public int fcVersion;
public String[] cacheDirs = new String[4];
}
/* fontconfig recognises slants roman, italic, as well as oblique,
* and a slew of weights, where the ones that matter here are
* regular and bold.
* To fully qualify what we want, we can for example ask for (eg)
* Font.PLAIN : "serif:regular:roman"
* Font.BOLD : "serif:bold:roman"
* Font.ITALIC : "serif:regular:italic"
* Font.BOLD|Font.ITALIC : "serif:bold:italic"
*/
private static String[] fontConfigNames = {
"sans:regular:roman",
"sans:bold:roman",
"sans:regular:italic",
"sans:bold:italic",
"serif:regular:roman",
"serif:bold:roman",
"serif:regular:italic",
"serif:bold:italic",
"monospace:regular:roman",
"monospace:bold:roman",
"monospace:regular:italic",
"monospace:bold:italic",
};
/* This array has the array elements created in Java code and is
* passed down to native to be filled in.
*/
private FcCompFont[] fontConfigFonts;
/**
* Instantiates a new FontConfigManager getting the default instance
* of FontManager from the FontManagerFactory.
*/
public FontConfigManager() {
}
/* Called from code that needs to know what are the AA settings
* that apps using FC would pick up for the default desktop font.
* Note apps can change the default desktop font. etc, so this
* isn't certain to be right but its going to correct for most cases.
* Native return values map to the text aa values in sun.awt.SunHints.
* which is used to look up the renderinghint value object.
*/
public static Object getFontConfigAAHint() {
return getFontConfigAAHint("sans");
}
/* This is public solely so that for debugging purposes it can be called
* with other names, which might (eg) include a size, eg "sans-24"
* The return value is a text aa rendering hint value.
* Normally we should call the no-args version.
*/
public static Object getFontConfigAAHint(String fcFamily) {
if (FontUtilities.isWindows) {
return null;
} else {
int hint = getFontConfigAASettings(getFCLocaleStr(), fcFamily);
if (hint < 0) {
return null;
} else {
return SunHints.Value.get(SunHints.INTKEY_TEXT_ANTIALIASING,
hint);
}
}
}
private static String getFCLocaleStr() {
Locale l = SunToolkit.getStartupLocale();
String localeStr = l.getLanguage();
String country = l.getCountry();
if (!country.isEmpty()) {
localeStr = localeStr + "-" + country;
}
return localeStr;
}
/* This does cause the native libfontconfig to be loaded and unloaded,
* but it does not incur the overhead of initialisation of its
* data structures, so shouldn't have a measurable impact.
*/
public static native int getFontConfigVersion();
/* This can be made public if it's needed to force a re-read
* rather than using the cached values. The re-read would be needed
* only if some event signalled that the fontconfig has changed.
* In that event this method would need to return directly the array
* to be used by the caller in case it subsequently changed.
*/
public synchronized void initFontConfigFonts(boolean includeFallbacks) {
if (fontConfigFonts != null) {
if (!includeFallbacks || (fontConfigFonts[0].allFonts != null)) {
return;
}
}
if (FontUtilities.isWindows || fontConfigFailed) {
return;
}
long t0 = 0;
if (FontUtilities.isLogging()) {
t0 = System.nanoTime();
}
FcCompFont[] fontArr = new FcCompFont[fontConfigNames.length];
for (int i = 0; i< fontArr.length; i++) {
fontArr[i] = new FcCompFont();
fontArr[i].fcName = fontConfigNames[i];
int colonPos = fontArr[i].fcName.indexOf(':');
fontArr[i].fcFamily = fontArr[i].fcName.substring(0, colonPos);
fontArr[i].jdkName = FontUtilities.mapFcName(fontArr[i].fcFamily);
fontArr[i].style = i % 4; // depends on array order.
}
getFontConfig(getFCLocaleStr(), fcInfo, fontArr, includeFallbacks);
FontConfigFont anyFont = null;
/* If don't find anything (eg no libfontconfig), then just return */
for (int i = 0; i< fontArr.length; i++) {
FcCompFont fci = fontArr[i];
if (fci.firstFont == null) {
if (FontUtilities.isLogging()) {
PlatformLogger logger = FontUtilities.getLogger();
logger.info("Fontconfig returned no font for " +
fontArr[i].fcName);
}
fontConfigFailed = true;
} else if (anyFont == null) {
anyFont = fci.firstFont;
}
}
if (anyFont == null) {
if (FontUtilities.isLogging()) {
PlatformLogger logger = FontUtilities.getLogger();
logger.info("Fontconfig returned no fonts at all.");
}
fontConfigFailed = true;
return;
} else if (fontConfigFailed) {
for (int i = 0; i< fontArr.length; i++) {
if (fontArr[i].firstFont == null) {
fontArr[i].firstFont = anyFont;
}
}
}
fontConfigFonts = fontArr;
if (FontUtilities.isLogging()) {
PlatformLogger logger = FontUtilities.getLogger();
long t1 = System.nanoTime();
logger.info("Time spent accessing fontconfig="
+ ((t1 - t0) / 1000000) + "ms.");
for (int i = 0; i< fontConfigFonts.length; i++) {
FcCompFont fci = fontConfigFonts[i];
logger.info("FC font " + fci.fcName+" maps to family " +
fci.firstFont.familyName +
" in file " + fci.firstFont.fontFile);
if (fci.allFonts != null) {
for (int f=0;f<fci.allFonts.length;f++) {
FontConfigFont fcf = fci.allFonts[f];
logger.info("Family=" + fcf.familyName +
" Style="+ fcf.styleStr +
" Fullname="+fcf.fullName +
" File="+fcf.fontFile);
}
}
}
}
}
public PhysicalFont registerFromFcInfo(FcCompFont fcInfo) {
SunFontManager fm = SunFontManager.getInstance();
/* If it's a TTC file we need to know that as we will need to
* make sure we return the right font */
String fontFile = fcInfo.firstFont.fontFile;
int offset = fontFile.length()-4;
if (offset <= 0) {
return null;
}
String ext = fontFile.substring(offset).toLowerCase();
boolean isTTC = ext.equals(".ttc");
/* If this file is already registered, can just return its font.
* However we do need to check in case it's a TTC as we need
* a specific font, so rather than directly returning it, let
* findFont2D resolve that.
*/
PhysicalFont physFont = fm.getRegisteredFontFile(fontFile);
if (physFont != null) {
if (isTTC) {
Font2D f2d = fm.findFont2D(fcInfo.firstFont.familyName,
fcInfo.style,
FontManager.NO_FALLBACK);
if (f2d instanceof PhysicalFont) { /* paranoia */
return (PhysicalFont)f2d;
} else {
return null;
}
} else {
return physFont;
}
}
/* If the font may hide a JRE font, we want to use the JRE version,
* so make it point to the JRE font.
*/
physFont = fm.findJREDeferredFont(fcInfo.firstFont.familyName,
fcInfo.style);
/* It is also possible the font file is on the "deferred" list,
* in which case we can just initialise it now.
*/
if (physFont == null &&
fm.isDeferredFont(fontFile) == true) {
physFont = fm.initialiseDeferredFont(fcInfo.firstFont.fontFile);
/* use findFont2D to get the right font from TTC's */
if (physFont != null) {
if (isTTC) {
Font2D f2d = fm.findFont2D(fcInfo.firstFont.familyName,
fcInfo.style,
FontManager.NO_FALLBACK);
if (f2d instanceof PhysicalFont) { /* paranoia */
return (PhysicalFont)f2d;
} else {
return null;
}
} else {
return physFont;
}
}
}
/* In the majority of cases we reach here, and need to determine
* the type and rank to register the font.
*/
if (physFont == null) {
int fontFormat = SunFontManager.FONTFORMAT_NONE;
int fontRank = Font2D.UNKNOWN_RANK;
if (ext.equals(".ttf") || isTTC) {
fontFormat = SunFontManager.FONTFORMAT_TRUETYPE;
fontRank = Font2D.TTF_RANK;
} else if (ext.equals(".pfa") || ext.equals(".pfb")) {
fontFormat = SunFontManager.FONTFORMAT_TYPE1;
fontRank = Font2D.TYPE1_RANK;
}
physFont = fm.registerFontFile(fcInfo.firstFont.fontFile, null,
fontFormat, true, fontRank);
}
return physFont;
}
/*
* We need to return a Composite font which has as the font in
* its first slot one obtained from fontconfig.
*/
public CompositeFont getFontConfigFont(String name, int style) {
name = name.toLowerCase();
initFontConfigFonts(false);
if (fontConfigFonts == null) {
// This avoids an immediate NPE if fontconfig look up failed
// but doesn't guarantee this is a recoverable situation.
return null;
}
FcCompFont fcInfo = null;
for (int i=0; i<fontConfigFonts.length; i++) {
if (name.equals(fontConfigFonts[i].fcFamily) &&
style == fontConfigFonts[i].style) {
fcInfo = fontConfigFonts[i];
break;
}
}
if (fcInfo == null) {
fcInfo = fontConfigFonts[0];
}
if (FontUtilities.isLogging()) {
FontUtilities.getLogger()
.info("FC name=" + name + " style=" + style +
" uses " + fcInfo.firstFont.familyName +
" in file: " + fcInfo.firstFont.fontFile);
}
if (fcInfo.compFont != null) {
return fcInfo.compFont;
}
/* jdkFont is going to be used for slots 1..N and as a fallback.
* Slot 0 will be the physical font from fontconfig.
*/
FontManager fm = FontManagerFactory.getInstance();
CompositeFont jdkFont = (CompositeFont)
fm.findFont2D(fcInfo.jdkName, style, FontManager.LOGICAL_FALLBACK);
if (fcInfo.firstFont.familyName == null ||
fcInfo.firstFont.fontFile == null) {
return (fcInfo.compFont = jdkFont);
}
/* First, see if the family and exact style is already registered.
* If it is, use it. If it's not, then try to register it.
* If that registration fails (signalled by null) just return the
* regular JDK composite.
* Algorithmically styled fonts won't match on exact style, so
* will fall through this code, but the regisration code will
* find that file already registered and return its font.
*/
FontFamily family = FontFamily.getFamily(fcInfo.firstFont.familyName);
PhysicalFont physFont = null;
if (family != null) {
Font2D f2D = family.getFontWithExactStyleMatch(fcInfo.style);
if (f2D instanceof PhysicalFont) {
physFont = (PhysicalFont)f2D;
}
}
if (physFont == null ||
!fcInfo.firstFont.fontFile.equals(physFont.platName)) {
physFont = registerFromFcInfo(fcInfo);
if (physFont == null) {
return (fcInfo.compFont = jdkFont);
}
family = FontFamily.getFamily(physFont.getFamilyName(null));
}
/* Now register the fonts in the family (the other styles) after
* checking that they aren't already registered and are actually in
* a different file. They may be the same file in CJK cases.
* For cases where they are different font files - eg as is common for
* Latin fonts, then we rely on fontconfig to report these correctly.
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