JDK14/Java14源码在线阅读
/*
* Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.awt;
import java.awt.GraphicsEnvironment;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.StreamTokenizer;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.swing.plaf.FontUIResource;
import sun.font.MFontConfiguration;
import sun.font.CompositeFont;
import sun.font.FontManager;
import sun.font.SunFontManager;
import sun.font.FcFontConfiguration;
import sun.font.FontAccess;
import sun.font.FontUtilities;
import sun.font.NativeFont;
import sun.util.logging.PlatformLogger;
/**
* The X11 implementation of {@link FontManager}.
*/
public final class X11FontManager extends FcFontManager {
// constants identifying XLFD and font ID fields
private static final int FOUNDRY_FIELD = 1;
private static final int FAMILY_NAME_FIELD = 2;
private static final int WEIGHT_NAME_FIELD = 3;
private static final int SLANT_FIELD = 4;
private static final int SETWIDTH_NAME_FIELD = 5;
private static final int ADD_STYLE_NAME_FIELD = 6;
private static final int PIXEL_SIZE_FIELD = 7;
private static final int POINT_SIZE_FIELD = 8;
private static final int RESOLUTION_X_FIELD = 9;
private static final int RESOLUTION_Y_FIELD = 10;
private static final int SPACING_FIELD = 11;
private static final int AVERAGE_WIDTH_FIELD = 12;
private static final int CHARSET_REGISTRY_FIELD = 13;
private static final int CHARSET_ENCODING_FIELD = 14;
/*
* fontNameMap is a map from a fontID (which is a substring of an XLFD like
* "-monotype-arial-bold-r-normal-iso8859-7")
* to font file path like
* /usr/openwin/lib/locale/iso_8859_7/X11/fonts/TrueType/ArialBoldItalic.ttf
* It's used in a couple of methods like
* getFileNameFomPlatformName(..) to help locate the font file.
* We use this substring of a full XLFD because the font configuration files
* define the XLFDs in a way that's easier to make into a request.
* E.g., the -0-0-0-0-p-0- reported by X is -*-%d-*-*-p-*- in the font
* configuration files. We need to remove that part for comparisons.
*/
private static Map<String, String> fontNameMap = new HashMap<>();
/*
* xlfdMap is a map from a platform path like
* /usr/openwin/lib/locale/ja/X11/fonts/TT/HG-GothicB.ttf to an XLFD like
* "-ricoh-hg gothic b-medium-r-normal--0-0-0-0-m-0-jisx0201.1976-0"
* Because there may be multiple native names, because the font is used
* to support multiple X encodings for example, the value of an entry in
* this map is always a vector where we store all the native names.
* For fonts which we don't understand the key isn't a pathname, its
* the full XLFD string like :-
* "-ricoh-hg gothic b-medium-r-normal--0-0-0-0-m-0-jisx0201.1976-0"
*/
private static Map<String, Vector<String>> xlfdMap = new HashMap<>();
/* xFontDirsMap is also a map from a font ID to a font filepath.
* The difference from fontNameMap is just that it does not have
* resolved symbolic links. Normally this is not interesting except
* that we need to know the directory in which a font was found to
* add it to the X font server path, since although the files may
* be linked, the fonts.dir is different and specific to the encoding
* handled by that directory. This map is nulled out after use to free
* heap space. If the optimal path is taken, such that all fonts in
* font configuration files are referenced by filename, then the font
* dir can be directly derived as its parent directory.
* If a font is used by two XLFDs, each corresponding to a different
* X11 font directory, then precautions must be taken to include both
* directories.
*/
private static Map<String, String> xFontDirsMap;
/*
* This is the set of font directories needed to be on the X font path
* to enable AWT heavyweights to find all of the font configuration fonts.
* It is populated by :
* - awtfontpath entries in the fontconfig.properties
* - parent directories of "core" fonts used in the fontconfig.properties
* - looking up font dirs in the xFontDirsMap where the key is a fontID
* (cut down version of the XLFD read from the font configuration file).
* This set is nulled out after use to free heap space.
*/
private static HashSet<String> fontConfigDirs = null;
/*
* Used to eliminate redundant work. When a font directory is
* registered it added to this list. Subsequent registrations for the
* same directory can then be skipped by checking this Map.
* Access to this map is not synchronised here since creation
* of the singleton GE instance is already synchronised and that is
* the only code path that accesses this map.
*/
private static HashMap<String, Object> registeredDirs = new HashMap<>();
/* Array of directories to be added to the X11 font path.
* Used by static method called from Toolkits which use X11 fonts.
* Specifically this means MToolkit
*/
private static String[] fontdirs = null;
public static X11FontManager getInstance() {
return (X11FontManager) SunFontManager.getInstance();
}
/**
* Takes family name property in the following format:
* "-linotype-helvetica-medium-r-normal-sans-*-%d-*-*-p-*-iso8859-1"
* and returns the name of the corresponding physical font.
* This code is used to resolve font configuration fonts, and expects
* only to get called for these fonts.
*/
@Override
public String getFileNameFromPlatformName(String platName) {
/* If the FontConfig file doesn't use xlfds, or its
* FcFontConfiguration, this may be already a file name.
*/
if (platName.startsWith("/")) {
return platName;
}
String fileName = null;
String fontID = specificFontIDForName(platName);
/* If the font filename has been explicitly assigned in the
* font configuration file, use it. This avoids accessing
* the wrong fonts on Linux, where different fonts (some
* of which may not be usable by 2D) may share the same
* specific font ID. It may also speed up the lookup.
*/
fileName = super.getFileNameFromPlatformName(platName);
if (fileName != null) {
if (isHeadless() && fileName.startsWith("-")) {
/* if it's headless, no xlfd should be used */
return null;
}
if (fileName.startsWith("/")) {
/* If a path is assigned in the font configuration file,
* it is required that the config file also specify using the
* new awtfontpath key the X11 font directories
* which must be added to the X11 font path to support
* AWT access to that font. For that reason we no longer
* have code here to add the parent directory to the list
* of font config dirs, since the parent directory may not
* be sufficient if fonts are symbolically linked to a
* different directory.
*
* Add this XLFD (platform name) to the list of known
* ones for this file.
*/
Vector<String> xVal = xlfdMap.get(fileName);
if (xVal == null) {
/* Try to be robust on Linux distros which move fonts
* around by verifying that the fileName represents a
* file that exists. If it doesn't, set it to null
* to trigger a search.
*/
if (getFontConfiguration().needToSearchForFile(fileName)) {
fileName = null;
}
if (fileName != null) {
xVal = new Vector<>();
xVal.add(platName);
xlfdMap.put(fileName, xVal);
}
} else {
if (!xVal.contains(platName)) {
xVal.add(platName);
}
}
}
if (fileName != null) {
fontNameMap.put(fontID, fileName);
return fileName;
}
}
if (fontID != null) {
fileName = fontNameMap.get(fontID);
if (fontPath == null &&
(fileName == null || !fileName.startsWith("/"))) {
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.warning("** Registering all font paths because " +
"can't find file for " + platName);
}
fontPath = getPlatformFontPath(noType1Font);
registerFontDirs(fontPath);
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.warning("** Finished registering all font paths");
}
fileName = fontNameMap.get(fontID);
}
if (fileName == null && !isHeadless()) {
/* Query X11 directly to see if this font is available
* as a native font.
*/
fileName = getX11FontName(platName);
}
if (fileName == null) {
fontID = switchFontIDForName(platName);
fileName = fontNameMap.get(fontID);
}
if (fileName != null) {
fontNameMap.put(fontID, fileName);
}
}
return fileName;
}
@Override
protected String[] getNativeNames(String fontFileName,
String platformName) {
Vector<String> nativeNames;
if ((nativeNames=xlfdMap.get(fontFileName))==null) {
if (platformName == null) {
return null;
} else {
/* back-stop so that at least the name used in the
* font configuration file is known as a native name
*/
String []natNames = new String[1];
natNames[0] = platformName;
return natNames;
}
} else {
int len = nativeNames.size();
return nativeNames.toArray(new String[len]);
}
}
/* NOTE: this method needs to be executed in a privileged context.
* The superclass constructor which is the primary caller of
* this method executes entirely in such a context. Additionally
* the loadFonts() method does too. So all should be well.
*/
@Override
protected void registerFontDir(String path) {
/* fonts.dir file format looks like :-
* 47
* Arial.ttf -monotype-arial-regular-r-normal--0-0-0-0-p-0-iso8859-1
* Arial-Bold.ttf -monotype-arial-bold-r-normal--0-0-0-0-p-0-iso8859-1
* ...
*/
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger().info("ParseFontDir " + path);
}
File fontsDotDir = new File(path + File.separator + "fonts.dir");
FileReader fr = null;
try {
if (fontsDotDir.canRead()) {
fr = new FileReader(fontsDotDir);
BufferedReader br = new BufferedReader(fr, 8192);
StreamTokenizer st = new StreamTokenizer(br);
st.eolIsSignificant(true);
int ttype = st.nextToken();
if (ttype == StreamTokenizer.TT_NUMBER) {
int numEntries = (int)st.nval;
ttype = st.nextToken();
if (ttype == StreamTokenizer.TT_EOL) {
st.resetSyntax();
st.wordChars(32, 127);
st.wordChars(128 + 32, 255);
st.whitespaceChars(0, 31);
for (int i=0; i < numEntries; i++) {
ttype = st.nextToken();
if (ttype == StreamTokenizer.TT_EOF) {
break;
}
if (ttype != StreamTokenizer.TT_WORD) {
break;
}
int breakPos = st.sval.indexOf(' ');
if (breakPos <= 0) {
/* On TurboLinux 8.0 a fonts.dir file had
* a line with integer value "24" which
* appeared to be the number of remaining
* entries in the file. This didn't add to
* the value on the first line of the file.
* Seemed like XFree86 didn't like this line
* much either. It failed to parse the file.
* Ignore lines like this completely, and
* don't let them count as an entry.
*/
numEntries++;
ttype = st.nextToken();
if (ttype != StreamTokenizer.TT_EOL) {
break;
}
continue;
}
if (st.sval.charAt(0) == '!') {
/* TurboLinux 8.0 comment line: ignore.
* can't use st.commentChar('!') to just
* skip because this line mustn't count
* against numEntries.
*/
numEntries++;
ttype = st.nextToken();
if (ttype != StreamTokenizer.TT_EOL) {
break;
}
continue;
}
String fileName = st.sval.substring(0, breakPos);
/* TurboLinux 8.0 uses some additional syntax to
* indicate algorithmic styling values.
* Ignore ':' separated files at the beginning
* of the fileName
*/
int lastColon = fileName.lastIndexOf(':');
if (lastColon > 0) {
if (lastColon+1 >= fileName.length()) {
continue;
}
fileName = fileName.substring(lastColon+1);
}
String fontPart = st.sval.substring(breakPos+1);
String fontID = specificFontIDForName(fontPart);
String sVal = fontNameMap.get(fontID);
if (FontUtilities.debugFonts()) {
PlatformLogger logger = FontUtilities.getLogger();
logger.info("file=" + fileName +
" xlfd=" + fontPart);
logger.info("fontID=" + fontID +
" sVal=" + sVal);
}
String fullPath = null;
try {
File file = new File(path,fileName);
/* we may have a resolved symbolic link
* this becomes important for an xlfd we
* still need to know the location it was
* found to update the X server font path
* for use by AWT heavyweights - and when 2D
* wants to use the native rasteriser.
*/
if (xFontDirsMap == null) {
xFontDirsMap = new HashMap<>();
}
xFontDirsMap.put(fontID, path);
fullPath = file.getCanonicalPath();
} catch (IOException e) {
fullPath = path + File.separator + fileName;
}
Vector<String> xVal = xlfdMap.get(fullPath);
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.info("fullPath=" + fullPath +
" xVal=" + xVal);
}
if ((xVal == null || !xVal.contains(fontPart)) &&
(sVal == null) || !sVal.startsWith("/")) {
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.info("Map fontID:"+fontID +
"to file:" + fullPath);
}
fontNameMap.put(fontID, fullPath);
if (xVal == null) {
xVal = new Vector<>();
xlfdMap.put (fullPath, xVal);
}
xVal.add(fontPart);
}
ttype = st.nextToken();
if (ttype != StreamTokenizer.TT_EOL) {
break;
}
}
}
}
fr.close();
}
} catch (IOException ioe1) {
} finally {
if (fr != null) {
try {
fr.close();
} catch (IOException ioe2) {
}
}
}
}
@Override
public void loadFonts() {
super.loadFonts();
/* These maps are greatly expanded during a loadFonts but
* can be reset to their initial state afterwards.
* Since preferLocaleFonts() and preferProportionalFonts() will
* trigger a partial repopulating from the FontConfiguration
* it has to be the inital (empty) state for the latter two, not
* simply nulling out.
* xFontDirsMap is a special case in that the implementation
* will typically not ever need to initialise it so it can be null.
*/
xFontDirsMap = null;
xlfdMap = new HashMap<>(1);
fontNameMap = new HashMap<>(1);
}
private static String getX11FontName(String platName) {
String xlfd = platName.replaceAll("%d", "*");
if (NativeFont.fontExists(xlfd)) {
return xlfd;
} else {
return null;
}
}
private boolean isHeadless() {
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
return GraphicsEnvironment.isHeadless();
}
private String specificFontIDForName(String name) {
int[] hPos = new int[14];
int hyphenCnt = 1;
int pos = 1;
while (pos != -1 && hyphenCnt < 14) {
pos = name.indexOf('-', pos);
if (pos != -1) {
hPos[hyphenCnt++] = pos;
pos++;
}
}
if (hyphenCnt != 14) {
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.severe("Font Configuration Font ID is malformed:" + name);
}
return name; // what else can we do?
}
StringBuffer sb =
new StringBuffer(name.substring(hPos[FAMILY_NAME_FIELD-1],
hPos[SETWIDTH_NAME_FIELD]));
sb.append(name.substring(hPos[CHARSET_REGISTRY_FIELD-1]));
String retval = sb.toString().toLowerCase (Locale.ENGLISH);
return retval;
}
private String switchFontIDForName(String name) {
int[] hPos = new int[14];
int hyphenCnt = 1;
int pos = 1;
while (pos != -1 && hyphenCnt < 14) {
pos = name.indexOf('-', pos);
if (pos != -1) {
hPos[hyphenCnt++] = pos;
pos++;
}
}
if (hyphenCnt != 14) {
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger()
.severe("Font Configuration Font ID is malformed:" + name);
}
return name; // what else can we do?
}
String slant = name.substring(hPos[SLANT_FIELD-1]+1,
hPos[SLANT_FIELD]);
String family = name.substring(hPos[FAMILY_NAME_FIELD-1]+1,
hPos[FAMILY_NAME_FIELD]);
String registry = name.substring(hPos[CHARSET_REGISTRY_FIELD-1]+1,
hPos[CHARSET_REGISTRY_FIELD]);
String encoding = name.substring(hPos[CHARSET_ENCODING_FIELD-1]+1);
if (slant.equals("i")) {
slant = "o";
} else if (slant.equals("o")) {
slant = "i";
}
// workaround for #4471000
if (family.equals("itc zapfdingbats")
&& registry.equals("sun")
&& encoding.equals("fontspecific")){
registry = "adobe";
}
StringBuffer sb =
new StringBuffer(name.substring(hPos[FAMILY_NAME_FIELD-1],
hPos[SLANT_FIELD-1]+1));
sb.append(slant);
sb.append(name.substring(hPos[SLANT_FIELD],
hPos[SETWIDTH_NAME_FIELD]+1));
sb.append(registry);
sb.append(name.substring(hPos[CHARSET_ENCODING_FIELD-1]));
String retval = sb.toString().toLowerCase (Locale.ENGLISH);
return retval;
}
/**
* Returns the face name for the given XLFD.
*/
public String getFileNameFromXLFD(String name) {
String fileName = null;
String fontID = specificFontIDForName(name);
if (fontID != null) {
fileName = fontNameMap.get(fontID);
if (fileName == null) {
fontID = switchFontIDForName(name);
fileName = fontNameMap.get(fontID);
}
if (fileName == null) {
fileName = getDefaultFontFile();
}
}
return fileName;
}
/* Register just the paths, (it doesn't register the fonts).
* If a font configuration file has specified a baseFontPath
* fontPath is just those directories, unless on usage we
* find it doesn't contain what we need for the logical fonts.
* Otherwise, we register all the paths on Solaris, because
* the fontPath we have here is the complete one from
* parsing /var/sadm/install/contents, not just
* what's on the X font path (may be this should be
* changed).
* But for now what it means is that if we didn't do
* this then if the font weren't listed anywhere on the
* less complete font path we'd trigger loadFonts which
* actually registers the fonts. This may actually be
* the right thing tho' since that would also set up
* the X font path without which we wouldn't be able to
* display some "native" fonts.
* So something to revisit is that probably fontPath
* here ought to be only the X font path + jre font dir.
* loadFonts should have a separate native call to
* get the rest of the platform font path.
*
* Registering the directories can now be avoided in the
* font configuration initialisation when filename entries
* exist in the font configuration file for all fonts.
* (Perhaps a little confusingly a filename entry is
* actually keyed using the XLFD used in the font entries,
* and it maps *to* a real filename).
* In the event any are missing, registration of all
* directories will be invoked to find the real files.
*
* But registering the directory performed other
* functions such as filling in the map of all native names
* for the font. So when this method isn't invoked, they still
* must be found. This is mitigated by getNativeNames now
* being able to return at least the platform name, but mostly
* by ensuring that when a filename key is found, that
* xlfd key is stored as one of the set of platform names
* for the font. Its a set because typical font configuration
* files reference the same CJK font files using multiple
* X11 encodings. For the code that adds this to the map
* see X11GE.getFileNameFromPlatformName(..)
* If you don't get all of these then some code points may
* not use the Xserver, and will not get the PCF bitmaps
* that are available for some point sizes.
* So, in the event that there is such a problem,
* unconditionally making this call may be necessary, at
* some cost to JRE start-up
*/
@Override
protected void registerFontDirs(String pathName) {
StringTokenizer parser = new StringTokenizer(pathName,
File.pathSeparator);
try {
while (parser.hasMoreTokens()) {
String dirPath = parser.nextToken();
if (dirPath != null && !registeredDirs.containsKey(dirPath)) {
registeredDirs.put(dirPath, null);
registerFontDir(dirPath);
}
}
} catch (NoSuchElementException e) {
}
}
// An X font spec (xlfd) includes an encoding. The same TrueType font file
// may be referenced from different X font directories in font.dir files
// to support use in multiple encodings by X apps.
// So for the purposes of font configuration logical fonts where AWT
// heavyweights need to access the font via X APIs we need to ensure that
// the directory for precisely the encodings needed by this are added to
// the x font path. This requires that we note the platform names
// specified in font configuration files and use that to identify the
// X font directory that contains a font.dir file for that platform name
// and add it to the X font path (if display is local)
// Here we make use of an already built map of xlfds to font locations
// to add the font location to the set of those required to build the
// x font path needed by AWT.
// These are added to the x font path later.
// All this is necessary because on Solaris the font.dir directories
// may contain not real font files, but symbolic links to the actual
// location but that location is not suitable for the x font path, since
// it probably doesn't have a font.dir at all and certainly not one
// with the required encodings
// If the fontconfiguration file is properly set up so that all fonts
// are mapped to files then we will never trigger initialising
// xFontDirsMap (it will be null). In this case the awtfontpath entries
// must specify all the X11 directories needed by AWT.
@Override
protected void addFontToPlatformFontPath(String platformName) {
// Lazily initialize fontConfigDirs.
getPlatformFontPathFromFontConfig();
if (xFontDirsMap != null) {
String fontID = specificFontIDForName(platformName);
String dirName = xFontDirsMap.get(fontID);
if (dirName != null) {
fontConfigDirs.add(dirName);
}
}
return;
}
private void getPlatformFontPathFromFontConfig() {
if (fontConfigDirs == null) {
fontConfigDirs = getFontConfiguration().getAWTFontPathSet();
if (FontUtilities.debugFonts() && fontConfigDirs != null) {
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