1 /*
   2  * Copyright (c) 1996, 2014, 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.ByteArrayInputStream;
  28 import java.io.InputStreamReader;
  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 
  46     public FontDescriptor(String nativeName, CharsetEncoder encoder,
  47                           int[] exclusionRanges){
  48 
  49         this.nativeName = nativeName;
  50         this.encoder = encoder;
  51         this.exclusionRanges = exclusionRanges;
  52         this.useUnicode = false;
  53         Charset cs = encoder.charset();
  54         // The following looks odd but its the only public way to get the
  55         // historical name if one exists and the canonical name otherwise.
  56         try {
  57             ByteArrayInputStream bais = new ByteArrayInputStream(new byte[8]);
  58             InputStreamReader isr = new InputStreamReader(bais, cs);
  59             this.charsetName = isr.getEncoding();
  60             isr.close();
  61         } catch (IOException ioe) {
  62         }
  63     }
  64 
  65     public String getNativeName() {
  66         return nativeName;
  67     }
  68 
  69     public CharsetEncoder getFontCharsetEncoder() {
  70         return encoder;
  71     }
  72 
  73     public String getFontCharsetName() {
  74         return charsetName;
  75     }
  76 
  77     public int[] getExclusionRanges() {
  78         return exclusionRanges;
  79     }
  80 
  81     /**
  82      * Return true if the character is exclusion character.
  83      */
  84     public boolean isExcluded(char ch){
  85         for (int i = 0; i < exclusionRanges.length; ){
  86 
  87             int lo = (exclusionRanges[i++]);
  88             int up = (exclusionRanges[i++]);
  89 
  90             if (ch >= lo && ch <= up){
  91                 return true;
  92             }
  93         }
  94         return false;
  95     }
  96 
  97     public String toString() {
  98         return super.toString() + " [" + nativeName + "|" + encoder + "]";
  99     }
 100 
 101     /**
 102      * Initialize JNI field and method IDs
 103      */
 104     private static native void initIDs();
 105 
 106 
 107     public CharsetEncoder unicodeEncoder;
 108     boolean useUnicode; // set to true from native code on Unicode-based systems
 109 
 110     public boolean useUnicode() {
 111         if (useUnicode && unicodeEncoder == null) {
 112             try {
 113                 this.unicodeEncoder = isLE?
 114                     StandardCharsets.UTF_16LE.newEncoder():
 115                     StandardCharsets.UTF_16BE.newEncoder();
 116             } catch (IllegalArgumentException x) {}
 117         }
 118         return useUnicode;
 119     }
 120     static boolean isLE;
 121     static {
 122         String enc = java.security.AccessController.doPrivileged(
 123            new sun.security.action.GetPropertyAction("sun.io.unicode.encoding",
 124                                                           "UnicodeBig"));
 125         isLE = !"UnicodeBig".equals(enc);
 126     }
 127 }