441 lines
16 KiB
Java
441 lines
16 KiB
Java
/*
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* Copyright (c) 1996, 2010, 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.awt.peer.FontPeer;
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import java.util.Locale;
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import java.util.Vector;
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import sun.font.SunFontManager;
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import sun.java2d.FontSupport;
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import java.nio.CharBuffer;
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import java.nio.ByteBuffer;
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public abstract class PlatformFont implements FontPeer {
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static {
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NativeLibLoader.loadLibraries();
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initIDs();
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}
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protected FontDescriptor[] componentFonts;
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protected char defaultChar;
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protected FontConfiguration fontConfig;
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protected FontDescriptor defaultFont;
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protected String familyName;
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private Object[] fontCache;
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// Maybe this should be a property that is set based
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// on the locale?
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protected static int FONTCACHESIZE = 256;
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protected static int FONTCACHEMASK = PlatformFont.FONTCACHESIZE - 1;
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protected static String osVersion;
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public PlatformFont(String name, int style){
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SunFontManager sfm = SunFontManager.getInstance();
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if (sfm instanceof FontSupport) {
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fontConfig = ((FontSupport)sfm).getFontConfiguration();
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}
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if (fontConfig == null) {
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return;
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}
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// map given font name to a valid logical font family name
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familyName = name.toLowerCase(Locale.ENGLISH);
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if (!FontConfiguration.isLogicalFontFamilyName(familyName)) {
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familyName = fontConfig.getFallbackFamilyName(familyName, "sansserif");
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}
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componentFonts = fontConfig.getFontDescriptors(familyName, style);
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// search default character
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//
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char missingGlyphCharacter = getMissingGlyphCharacter();
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defaultChar = '?';
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if (componentFonts.length > 0)
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defaultFont = componentFonts[0];
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for (int i = 0; i < componentFonts.length; i++){
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if (componentFonts[i].isExcluded(missingGlyphCharacter)) {
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continue;
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}
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if (componentFonts[i].encoder.canEncode(missingGlyphCharacter)) {
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defaultFont = componentFonts[i];
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defaultChar = missingGlyphCharacter;
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break;
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}
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}
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}
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/**
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* Returns the character that should be rendered when a glyph
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* is missing.
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*/
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protected abstract char getMissingGlyphCharacter();
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/**
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* make a array of CharsetString with given String.
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*/
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public CharsetString[] makeMultiCharsetString(String str){
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return makeMultiCharsetString(str.toCharArray(), 0, str.length(), true);
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}
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/**
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* make a array of CharsetString with given String.
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*/
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public CharsetString[] makeMultiCharsetString(String str, boolean allowdefault){
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return makeMultiCharsetString(str.toCharArray(), 0, str.length(), allowdefault);
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}
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/**
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* make a array of CharsetString with given char array.
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* @param str The char array to convert.
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* @param offset offset of first character of interest
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* @param len number of characters to convert
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*/
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public CharsetString[] makeMultiCharsetString(char str[], int offset, int len) {
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return makeMultiCharsetString(str, offset, len, true);
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}
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/**
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* make a array of CharsetString with given char array.
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* @param str The char array to convert.
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* @param offset offset of first character of interest
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* @param len number of characters to convert
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* @param allowDefault whether to allow the default char.
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* Setting this to true overloads the meaning of this method to
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* return non-null only if all chars can be converted.
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* @return array of CharsetString or if allowDefault is false and any
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* of the returned chars would have been converted to a default char,
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* then return null.
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* This is used to choose alternative means of displaying the text.
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*/
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public CharsetString[] makeMultiCharsetString(char str[], int offset, int len,
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boolean allowDefault) {
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if (len < 1) {
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return new CharsetString[0];
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}
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Vector mcs = null;
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char[] tmpStr = new char[len];
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char tmpChar = defaultChar;
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boolean encoded = false;
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FontDescriptor currentFont = defaultFont;
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for (int i = 0; i < componentFonts.length; i++) {
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if (componentFonts[i].isExcluded(str[offset])){
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continue;
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}
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/* Need "encoded" variable to distinguish the case when
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* the default char is the same as the encoded char.
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* The defaultChar on Linux is '?' so it is needed there.
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*/
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if (componentFonts[i].encoder.canEncode(str[offset])){
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currentFont = componentFonts[i];
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tmpChar = str[offset];
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encoded = true;
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break;
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}
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}
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if (!allowDefault && !encoded) {
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return null;
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} else {
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tmpStr[0] = tmpChar;
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}
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int lastIndex = 0;
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for (int i = 1; i < len; i++){
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char ch = str[offset + i];
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FontDescriptor fd = defaultFont;
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tmpChar = defaultChar;
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encoded = false;
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for (int j = 0; j < componentFonts.length; j++){
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if (componentFonts[j].isExcluded(ch)){
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continue;
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}
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if (componentFonts[j].encoder.canEncode(ch)){
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fd = componentFonts[j];
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tmpChar = ch;
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encoded = true;
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break;
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}
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}
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if (!allowDefault && !encoded) {
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return null;
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} else {
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tmpStr[i] = tmpChar;
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}
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if (currentFont != fd){
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if (mcs == null) {
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mcs = new Vector(3);
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}
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mcs.addElement(new CharsetString(tmpStr, lastIndex,
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i-lastIndex, currentFont));
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currentFont = fd;
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fd = defaultFont;
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lastIndex = i;
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}
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}
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CharsetString[] result;
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CharsetString cs = new CharsetString(tmpStr, lastIndex,
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len-lastIndex, currentFont);
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if (mcs == null) {
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result = new CharsetString[1];
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result[0] = cs;
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} else {
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mcs.addElement(cs);
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result = new CharsetString[mcs.size()];
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for (int i = 0; i < mcs.size(); i++){
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result[i] = (CharsetString)mcs.elementAt(i);
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}
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}
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return result;
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}
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/**
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* Is it possible that this font's metrics require the multi-font calls?
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* This might be true, for example, if the font supports kerning.
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**/
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public boolean mightHaveMultiFontMetrics() {
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return fontConfig != null;
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}
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/**
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* Specialized fast path string conversion for AWT.
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*/
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public Object[] makeConvertedMultiFontString(String str)
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{
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return makeConvertedMultiFontChars(str.toCharArray(),0,str.length());
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}
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public Object[] makeConvertedMultiFontChars(char[] data,
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int start, int len)
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{
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Object[] result = new Object[2];
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Object[] workingCache;
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byte[] convertedData = null;
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int stringIndex = start;
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int convertedDataIndex = 0;
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int resultIndex = 0;
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int cacheIndex;
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FontDescriptor currentFontDescriptor = null;
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FontDescriptor lastFontDescriptor = null;
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char currentDefaultChar;
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PlatformFontCache theChar;
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// Simple bounds check
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int end = start + len;
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if (start < 0 || end > data.length) {
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throw new ArrayIndexOutOfBoundsException();
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}
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if(stringIndex >= end) {
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return null;
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}
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// coversion loop
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while(stringIndex < end)
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{
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currentDefaultChar = data[stringIndex];
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// Note that cache sizes must be a power of two!
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cacheIndex = (int)(currentDefaultChar & this.FONTCACHEMASK);
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theChar = (PlatformFontCache)getFontCache()[cacheIndex];
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// Is the unicode char we want cached?
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if(theChar == null || theChar.uniChar != currentDefaultChar)
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{
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/* find a converter that can convert the current character */
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currentFontDescriptor = defaultFont;
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currentDefaultChar = defaultChar;
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char ch = (char)data[stringIndex];
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int componentCount = componentFonts.length;
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for (int j = 0; j < componentCount; j++) {
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FontDescriptor fontDescriptor = componentFonts[j];
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fontDescriptor.encoder.reset();
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//fontDescriptor.encoder.onUnmappleCharacterAction(...);
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if (fontDescriptor.isExcluded(ch)) {
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continue;
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}
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if (fontDescriptor.encoder.canEncode(ch)) {
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currentFontDescriptor = fontDescriptor;
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currentDefaultChar = ch;
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break;
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}
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}
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try {
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char[] input = new char[1];
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input[0] = currentDefaultChar;
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theChar = new PlatformFontCache();
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if (currentFontDescriptor.useUnicode()) {
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/*
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currentFontDescriptor.unicodeEncoder.encode(CharBuffer.wrap(input),
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theChar.bb,
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true);
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*/
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if (currentFontDescriptor.isLE) {
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theChar.bb.put((byte)(input[0] & 0xff));
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theChar.bb.put((byte)(input[0] >>8));
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} else {
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theChar.bb.put((byte)(input[0] >> 8));
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theChar.bb.put((byte)(input[0] & 0xff));
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}
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}
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else {
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currentFontDescriptor.encoder.encode(CharBuffer.wrap(input),
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theChar.bb,
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true);
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}
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theChar.fontDescriptor = currentFontDescriptor;
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theChar.uniChar = data[stringIndex];
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getFontCache()[cacheIndex] = theChar;
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} catch(Exception e){
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// Should never happen!
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System.err.println(e);
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e.printStackTrace();
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return null;
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}
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}
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// Check to see if we've changed fonts.
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if(lastFontDescriptor != theChar.fontDescriptor) {
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if(lastFontDescriptor != null) {
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result[resultIndex++] = lastFontDescriptor;
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result[resultIndex++] = convertedData;
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// Add the size to the converted data field.
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if(convertedData != null) {
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convertedDataIndex -= 4;
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convertedData[0] = (byte)(convertedDataIndex >> 24);
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convertedData[1] = (byte)(convertedDataIndex >> 16);
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convertedData[2] = (byte)(convertedDataIndex >> 8);
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convertedData[3] = (byte)convertedDataIndex;
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}
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if(resultIndex >= result.length) {
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Object[] newResult = new Object[result.length * 2];
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System.arraycopy(result, 0, newResult, 0,
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result.length);
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result = newResult;
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}
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}
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if (theChar.fontDescriptor.useUnicode()) {
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convertedData = new byte[(end - stringIndex + 1) *
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(int)theChar.fontDescriptor.unicodeEncoder.maxBytesPerChar()
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+ 4];
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}
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else {
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convertedData = new byte[(end - stringIndex + 1) *
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(int)theChar.fontDescriptor.encoder.maxBytesPerChar()
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+ 4];
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}
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convertedDataIndex = 4;
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lastFontDescriptor = theChar.fontDescriptor;
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}
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byte[] ba = theChar.bb.array();
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int size = theChar.bb.position();
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if(size == 1) {
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convertedData[convertedDataIndex++] = ba[0];
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}
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else if(size == 2) {
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convertedData[convertedDataIndex++] = ba[0];
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convertedData[convertedDataIndex++] = ba[1];
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} else if(size == 3) {
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convertedData[convertedDataIndex++] = ba[0];
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convertedData[convertedDataIndex++] = ba[1];
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convertedData[convertedDataIndex++] = ba[2];
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} else if(size == 4) {
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convertedData[convertedDataIndex++] = ba[0];
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convertedData[convertedDataIndex++] = ba[1];
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convertedData[convertedDataIndex++] = ba[2];
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convertedData[convertedDataIndex++] = ba[3];
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}
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stringIndex++;
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}
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result[resultIndex++] = lastFontDescriptor;
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result[resultIndex] = convertedData;
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// Add the size to the converted data field.
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if(convertedData != null) {
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convertedDataIndex -= 4;
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convertedData[0] = (byte)(convertedDataIndex >> 24);
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convertedData[1] = (byte)(convertedDataIndex >> 16);
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convertedData[2] = (byte)(convertedDataIndex >> 8);
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convertedData[3] = (byte)convertedDataIndex;
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}
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return result;
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}
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/*
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* Create fontCache on demand instead of during construction to
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* reduce overall memory consumption.
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*
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* This method is declared final so that its code can be inlined
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* by the compiler.
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*/
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protected final Object[] getFontCache() {
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// This method is not MT-safe by design. Since this is just a
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// cache anyways, it's okay if we occasionally allocate the array
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// twice or return an array which will be dereferenced and gced
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// right away.
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if (fontCache == null) {
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fontCache = new Object[this.FONTCACHESIZE];
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}
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return fontCache;
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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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class PlatformFontCache
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{
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char uniChar;
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FontDescriptor fontDescriptor;
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ByteBuffer bb = ByteBuffer.allocate(4);
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}
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}
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