JDK14/Java14源码在线阅读
/*
* Copyright (c) 2003, 2006, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.font;
import java.io.File;
import java.awt.Font;
import java.io.IOException;
import java.util.Collection;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.Locale;
public class FontFamily {
private static ConcurrentHashMap<String, FontFamily>
familyNameMap = new ConcurrentHashMap<String, FontFamily>();
private static HashMap<String, FontFamily> allLocaleNames;
protected String familyName;
protected Font2D plain;
protected Font2D bold;
protected Font2D italic;
protected Font2D bolditalic;
protected boolean logicalFont = false;
protected int familyRank;
public static FontFamily getFamily(String name) {
return familyNameMap.get(name.toLowerCase(Locale.ENGLISH));
}
public static String[] getAllFamilyNames() {
return null;
}
/* Only for use by FontManager.deRegisterBadFont(..).
* If this was the only font in the family, the family is removed
* from the map
*/
static void remove(Font2D font2D) {
String name = font2D.getFamilyName(Locale.ENGLISH);
FontFamily family = getFamily(name);
if (family == null) {
return;
}
if (family.plain == font2D) {
family.plain = null;
}
if (family.bold == font2D) {
family.bold = null;
}
if (family.italic == font2D) {
family.italic = null;
}
if (family.bolditalic == font2D) {
family.bolditalic = null;
}
if (family.plain == null && family.bold == null &&
family.italic == null && family.bolditalic == null) {
familyNameMap.remove(name);
}
}
public FontFamily(String name, boolean isLogFont, int rank) {
logicalFont = isLogFont;
familyName = name;
familyRank = rank;
familyNameMap.put(name.toLowerCase(Locale.ENGLISH), this);
}
/* Create a family for created fonts which aren't listed in the
* main map.
*/
FontFamily(String name) {
logicalFont = false;
familyName = name;
familyRank = Font2D.DEFAULT_RANK;
}
public String getFamilyName() {
return familyName;
}
public int getRank() {
return familyRank;
}
private boolean isFromSameSource(Font2D font) {
if (!(font instanceof FileFont)) {
return false;
}
FileFont existingFont = null;
if (plain instanceof FileFont) {
existingFont = (FileFont)plain;
} else if (bold instanceof FileFont) {
existingFont = (FileFont)bold;
} else if (italic instanceof FileFont) {
existingFont = (FileFont)italic;
} else if (bolditalic instanceof FileFont) {
existingFont = (FileFont)bolditalic;
}
// A family isn't created until there's a font.
// So if we didn't find a file font it means this
// isn't a file-based family.
if (existingFont == null) {
return false;
}
File existDir = (new File(existingFont.platName)).getParentFile();
FileFont newFont = (FileFont)font;
File newDir = (new File(newFont.platName)).getParentFile();
if (existDir != null) {
try {
existDir = existDir.getCanonicalFile();
} catch (IOException ignored) {}
}
if (newDir != null) {
try {
newDir = newDir.getCanonicalFile();
} catch (IOException ignored) {}
}
return java.util.Objects.equals(newDir, existDir);
}
/*
* We want a family to be of the same width and prefer medium/normal width.
* Once we find a particular width we accept more of the same width
* until we find one closer to normal when we 'evict' all existing fonts.
* So once we see a 'normal' width font we evict all members that are not
* normal width and then accept only new ones that are normal width.
*
* Once a font passes the width test we subject it to the weight test.
* For Plain we target the weight the closest that is <= NORMAL (400)
* For Bold we target the weight that is closest to BOLD (700).
*
* In the future, rather than discarding these fonts, we should
* extend the family to include these so lookups on these properties
* can locate them, as presently they will only be located by full name
* based lookup.
*/
private int familyWidth = 0;
private boolean preferredWidth(Font2D font) {
int newWidth = font.getWidth();
if (familyWidth == 0) {
familyWidth = newWidth;
return true;
}
if (newWidth == familyWidth) {
return true;
}
if (Math.abs(Font2D.FWIDTH_NORMAL - newWidth) <
Math.abs(Font2D.FWIDTH_NORMAL - familyWidth))
{
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger().info(
"Found more preferred width. New width = " + newWidth +
" Old width = " + familyWidth + " in font " + font +
" nulling out fonts plain: " + plain + " bold: " + bold +
" italic: " + italic + " bolditalic: " + bolditalic);
}
familyWidth = newWidth;
plain = bold = italic = bolditalic = null;
return true;
} else if (FontUtilities.debugFonts()) {
FontUtilities.getLogger().info(
"Family rejecting font " + font +
" of less preferred width " + newWidth);
}
return false;
}
private boolean closerWeight(Font2D currFont, Font2D font, int style) {
if (familyWidth != font.getWidth()) {
return false;
}
if (currFont == null) {
return true;
}
if (FontUtilities.debugFonts()) {
FontUtilities.getLogger().info(
"New weight for style " + style + ". Curr.font=" + currFont +
" New font="+font+" Curr.weight="+ + currFont.getWeight()+
" New weight="+font.getWeight());
}
int newWeight = font.getWeight();
switch (style) {
case Font.PLAIN:
case Font.ITALIC:
return (newWeight <= Font2D.FWEIGHT_NORMAL &&
newWeight > currFont.getWeight());
case Font.BOLD:
case Font.BOLD|Font.ITALIC:
return (Math.abs(newWeight - Font2D.FWEIGHT_BOLD) <
Math.abs(currFont.getWeight() - Font2D.FWEIGHT_BOLD));
default:
return false;
}
}
public void setFont(Font2D font, int style) {
if (FontUtilities.isLogging()) {
String msg;
if (font instanceof CompositeFont) {
msg = "Request to add " + font.getFamilyName(null) +
" with style " + style + " to family " + familyName;
} else {
msg = "Request to add " + font +
" with style " + style + " to family " + this;
}
FontUtilities.getLogger().info(msg);
}
/* Allow a lower-rank font only if its a file font
* from the exact same source as any previous font.
*/
if ((font.getRank() > familyRank) && !isFromSameSource(font)) {
if (FontUtilities.isLogging()) {
FontUtilities.getLogger()
.warning("Rejecting adding " + font +
" of lower rank " + font.getRank() +
" to family " + this +
" of rank " + familyRank);
}
return;
}
switch (style) {
case Font.PLAIN:
if (preferredWidth(font) && closerWeight(plain, font, style)) {
plain = font;
}
break;
case Font.BOLD:
if (preferredWidth(font) && closerWeight(bold, font, style)) {
bold = font;
}
break;
case Font.ITALIC:
if (preferredWidth(font) && closerWeight(italic, font, style)) {
italic = font;
}
break;
case Font.BOLD|Font.ITALIC:
if (preferredWidth(font) && closerWeight(bolditalic, font, style)) {
bolditalic = font;
}
break;
default:
break;
}
}
public Font2D getFontWithExactStyleMatch(int style) {
switch (style) {
case Font.PLAIN:
return plain;
case Font.BOLD:
return bold;
case Font.ITALIC:
return italic;
case Font.BOLD|Font.ITALIC:
return bolditalic;
default:
return null;
}
}
/* REMIND: if the callers of this method are operating in an
* environment in which not all fonts are registered, the returned
* font may be a algorithmically styled one, where in fact if loadfonts
* were executed, a styled font may be located. Our present "solution"
* to this is to register all fonts in a directory and assume that this
* registered all the styles of a font, since they would all be in the
* same location.
*/
public Font2D getFont(int style) {
switch (style) {
case Font.PLAIN:
return plain;
case Font.BOLD:
if (bold != null) {
return bold;
} else if (plain != null && plain.canDoStyle(style)) {
return plain;
} else {
return null;
}
case Font.ITALIC:
if (italic != null) {
return italic;
} else if (plain != null && plain.canDoStyle(style)) {
return plain;
} else {
return null;
}
case Font.BOLD|Font.ITALIC:
if (bolditalic != null) {
return bolditalic;
} else if (bold != null && bold.canDoStyle(style)) {
return bold;
} else if (italic != null && italic.canDoStyle(style)) {
return italic;
} else if (plain != null && plain.canDoStyle(style)) {
return plain;
} else {
return null;
}
default:
return null;
}
}
/* Only to be called if getFont(style) returns null
* This method will only return null if the family is completely empty!
* Note that it assumes the font of the style you need isn't in the
* family. The logic here is that if we must substitute something
* it might as well be from the same family.
*/
Font2D getClosestStyle(int style) {
switch (style) {
/* if you ask for a plain font try to return a non-italic one,
* then a italic one, finally a bold italic one */
case Font.PLAIN:
if (bold != null) {
return bold;
} else if (italic != null) {
return italic;
} else {
return bolditalic;
}
/* if you ask for a bold font try to return a non-italic one,
* then a bold italic one, finally an italic one */
case Font.BOLD:
if (plain != null) {
return plain;
} else if (bolditalic != null) {
return bolditalic;
} else {
return italic;
}
/* if you ask for a italic font try to return a bold italic one,
* then a plain one, finally an bold one */
case Font.ITALIC:
if (bolditalic != null) {
return bolditalic;
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