1 /*
   2  * Copyright (c) 1996, 2020, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 package sun.awt;
  26 
  27 import java.io.ByteArrayOutputStream;
  28 import java.io.OutputStreamWriter;
  29 import java.io.IOException;
  30 import java.nio.charset.Charset;
  31 import java.nio.charset.CharsetEncoder;
  32 import java.nio.charset.StandardCharsets;
  33 
  34 public class FontDescriptor implements Cloneable {
  35 
  36     static {
  37         NativeLibLoader.loadLibraries();
  38         initIDs();
  39     }
  40 
  41     String nativeName;
  42     public CharsetEncoder encoder;
  43     String charsetName;
  44     private int[] exclusionRanges;
  45     private final boolean defaultFont;
  46 
  47     public FontDescriptor(String nativeName, CharsetEncoder encoder,
  48                           int[] exclusionRanges) {
  49         this(nativeName, encoder, exclusionRanges, false);
  50     }
  51 
  52     public FontDescriptor(String nativeName, CharsetEncoder encoder,
  53                           int[] exclusionRanges, boolean defaultFont) {
  54 
  55         this.nativeName = nativeName;
  56         this.encoder = encoder;
  57         this.exclusionRanges = exclusionRanges;
  58         this.useUnicode = false;
  59         this.defaultFont = defaultFont;
  60         Charset cs = encoder.charset();
  61         // The following looks odd but its the only public way to get the
  62         // historical name if one exists and the canonical name otherwise.
  63         try {
  64             OutputStreamWriter osw = new OutputStreamWriter(new ByteArrayOutputStream(), cs);
  65             this.charsetName = osw.getEncoding();
  66             osw.close();
  67         } catch (IOException ioe) {
  68         }
  69     }
  70 
  71     public String getNativeName() {
  72         return nativeName;
  73     }
  74 
  75     public CharsetEncoder getFontCharsetEncoder() {
  76         return encoder;
  77     }
  78 
  79     public String getFontCharsetName() {
  80         return charsetName;
  81     }
  82 
  83     public int[] getExclusionRanges() {
  84         return exclusionRanges;
  85     }
  86 
  87     /**
  88      * Return true if the character is exclusion character.
  89      */
  90     public boolean isExcluded(char ch){
  91         for (int i = 0; i < exclusionRanges.length; ){
  92 
  93             int lo = (exclusionRanges[i++]);
  94             int up = (exclusionRanges[i++]);
  95 
  96             if (ch >= lo && ch <= up){
  97                 return true;
  98             }
  99         }
 100         return false;
 101     }
 102 
 103     public String toString() {
 104         return super.toString() + " [" + nativeName + "|" + encoder + "]";
 105     }
 106 
 107     /**
 108      * Initialize JNI field and method IDs
 109      */
 110     private static native void initIDs();
 111 
 112 
 113     public CharsetEncoder unicodeEncoder;
 114     boolean useUnicode; // set to true from native code on Unicode-based systems
 115 
 116     public boolean useUnicode() {
 117         if (useUnicode && unicodeEncoder == null) {
 118             try {
 119                 this.unicodeEncoder = isLE?
 120                     StandardCharsets.UTF_16LE.newEncoder():
 121                     StandardCharsets.UTF_16BE.newEncoder();
 122             } catch (IllegalArgumentException x) {}
 123         }
 124         return useUnicode;
 125     }
 126     static boolean isLE;
 127     static {
 128         String enc = java.security.AccessController.doPrivileged(
 129            new sun.security.action.GetPropertyAction("sun.io.unicode.encoding",
 130                                                           "UnicodeBig"));
 131         isLE = !"UnicodeBig".equals(enc);
 132     }
 133 
 134     public boolean isDefaultFont() {
 135         return defaultFont;
 136     }
 137 }