jdk/src/java.desktop/share/classes/sun/awt/FontDescriptor.java
author prr
Mon, 13 Apr 2015 17:06:04 -0700
changeset 30456 2a753e3fc714
parent 25859 3317bb8137f4
child 31895 383f94d2ed33
permissions -rw-r--r--
8035302: Eliminate dependency on jdk.charsets from 2D font code. Reviewed-by: mchung, alanb, sherman, serb
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/*
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 * Copyright (c) 1996, 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package sun.awt;
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import java.io.ByteArrayInputStream;
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import java.io.InputStreamReader;
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import java.io.IOException;;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetEncoder;
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import java.nio.charset.StandardCharsets;
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public class FontDescriptor implements Cloneable {
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    static {
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        NativeLibLoader.loadLibraries();
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        initIDs();
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    }
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    String nativeName;
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    public CharsetEncoder encoder;
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    String charsetName;
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    private int[] exclusionRanges;
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    public FontDescriptor(String nativeName, CharsetEncoder encoder,
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                          int[] exclusionRanges){
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        this.nativeName = nativeName;
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        this.encoder = encoder;
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        this.exclusionRanges = exclusionRanges;
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        this.useUnicode = false;
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        Charset cs = encoder.charset();
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        // The following looks odd but its the only public way to get the
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        // historical name if one exists and the canonical name otherwise.
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        try {
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            ByteArrayInputStream bais = new ByteArrayInputStream(new byte[8]);
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            InputStreamReader isr = new InputStreamReader(bais, cs);
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            this.charsetName = isr.getEncoding();
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            isr.close();
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        } catch (IOException ioe) {
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        }
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    }
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    public String getNativeName() {
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        return nativeName;
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    }
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    public CharsetEncoder getFontCharsetEncoder() {
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        return encoder;
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    }
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    public String getFontCharsetName() {
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        return charsetName;
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    }
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    public int[] getExclusionRanges() {
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        return exclusionRanges;
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    }
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    /**
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     * Return true if the character is exclusion character.
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     */
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    public boolean isExcluded(char ch){
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        for (int i = 0; i < exclusionRanges.length; ){
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            int lo = (exclusionRanges[i++]);
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            int up = (exclusionRanges[i++]);
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            if (ch >= lo && ch <= up){
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                return true;
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            }
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        }
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        return false;
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    }
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    public String toString() {
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        return super.toString() + " [" + nativeName + "|" + encoder + "]";
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    }
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    /**
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     * Initialize JNI field and method IDs
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     */
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    private static native void initIDs();
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    public CharsetEncoder unicodeEncoder;
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    boolean useUnicode; // set to true from native code on Unicode-based systems
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    public boolean useUnicode() {
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        if (useUnicode && unicodeEncoder == null) {
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            try {
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                this.unicodeEncoder = isLE?
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                    StandardCharsets.UTF_16LE.newEncoder():
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                    StandardCharsets.UTF_16BE.newEncoder();
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            } catch (IllegalArgumentException x) {}
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        }
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        return useUnicode;
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    }
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    static boolean isLE;
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    static {
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        String enc = java.security.AccessController.doPrivileged(
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           new sun.security.action.GetPropertyAction("sun.io.unicode.encoding",
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                                                          "UnicodeBig"));
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        isLE = !"UnicodeBig".equals(enc);
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    }
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}