1 /*
   2  * Copyright (c) 1996, 2017, 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 
  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             OutputStreamWriter osw = new OutputStreamWriter(new ByteArrayOutputStream(), cs);
  58             this.charsetName = osw.getEncoding();
  59             osw.close();
  60         } catch (IOException ioe) {
  61         }
  62     }
  63 
  64     public String getNativeName() {
  65         return nativeName;
  66     }
  67 
  68     public CharsetEncoder getFontCharsetEncoder() {
  69         return encoder;
  70     }
  71 
  72     public String getFontCharsetName() {
  73         return charsetName;
  74     }
  75 
  76     public int[] getExclusionRanges() {
  77         return exclusionRanges;
  78     }
  79 
  80     /**
  81      * Return true if the character is exclusion character.
  82      */
  83     public boolean isExcluded(char ch){
  84         for (int i = 0; i < exclusionRanges.length; ){
  85 
  86             int lo = (exclusionRanges[i++]);
  87             int up = (exclusionRanges[i++]);
  88 
  89             if (ch >= lo && ch <= up){
  90                 return true;
  91             }
  92         }
  93         return false;
  94     }
  95 
  96     public String toString() {
  97         return super.toString() + " [" + nativeName + "|" + encoder + "]";
  98     }
  99 
 100     /**
 101      * Initialize JNI field and method IDs
 102      */
 103     private static native void initIDs();
 104 
 105 
 106     public CharsetEncoder unicodeEncoder;
 107     boolean useUnicode; // set to true from native code on Unicode-based systems
 108 
 109     public boolean useUnicode() {
 110         if (useUnicode && unicodeEncoder == null) {
 111             try {
 112                 this.unicodeEncoder = isLE?
 113                     StandardCharsets.UTF_16LE.newEncoder():
 114                     StandardCharsets.UTF_16BE.newEncoder();
 115             } catch (IllegalArgumentException x) {}
 116         }
 117         return useUnicode;
 118     }
 119     static boolean isLE;
 120     static {
 121         String enc = java.security.AccessController.doPrivileged(
 122            new sun.security.action.GetPropertyAction("sun.io.unicode.encoding",
 123                                                           "UnicodeBig"));
 124         isLE = !"UnicodeBig".equals(enc);
 125     }
 126 }