/*

 * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.font;

import java.awt.Font;

import java.awt.FontFormatException;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.FilenameFilter;

import java.io.IOException;

import java.io.InputStreamReader;

import java.security.AccessController;

import java.security.PrivilegedAction;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.NoSuchElementException;

import java.util.StringTokenizer;

import java.util.TreeMap;

import java.util.Vector;

import java.util.concurrent.ConcurrentHashMap;

import javax.swing.plaf.FontUIResource;

import sun.awt.AppContext;

import sun.awt.FontConfiguration;

import sun.awt.SunToolkit;

import sun.awt.util.ThreadGroupUtils;

import sun.java2d.FontSupport;

import sun.util.logging.PlatformLogger;

/**

 * The base implementation of the {@link FontManager} interface. It implements

 * the platform independent, shared parts of OpenJDK's FontManager

 * implementations. The platform specific parts are declared as abstract

 * methods that have to be implemented by specific implementations.

 */

public abstract class SunFontManager implements FontSupport, FontManagerForSGE {

    private static class TTFilter implements FilenameFilter {

        public boolean accept(File dir,String name) {

            /* all conveniently have the same suffix length */

            int offset = name.length()-4;

            if (offset <= 0) { /* must be at least A.ttf */

                return false;

            } else {

                return(name.startsWith(".ttf", offset) ||

                       name.startsWith(".TTF", offset) ||

                       name.startsWith(".ttc", offset) ||

                       name.startsWith(".TTC", offset) ||

                       name.startsWith(".otf", offset) ||

                       name.startsWith(".OTF", offset));

            }

        }

    }

    private static class T1Filter implements FilenameFilter {

        public boolean accept(File dir,String name) {

            if (noType1Font) {

                return false;

            }

            /* all conveniently have the same suffix length */

            int offset = name.length()-4;

            if (offset <= 0) { /* must be at least A.pfa */

                return false;

            } else {

                return(name.startsWith(".pfa", offset) ||

                       name.startsWith(".pfb", offset) ||

                       name.startsWith(".PFA", offset) ||

                       name.startsWith(".PFB", offset));

            }

        }

    }

     private static class TTorT1Filter implements FilenameFilter {

        public boolean accept(File dir, String name) {

            /* all conveniently have the same suffix length */

            int offset = name.length()-4;

            if (offset <= 0) { /* must be at least A.ttf or A.pfa */

                return false;

            } else {

                boolean isTT =

                    name.startsWith(".ttf", offset) ||

                    name.startsWith(".TTF", offset) ||

                    name.startsWith(".ttc", offset) ||

                    name.startsWith(".TTC", offset) ||

                    name.startsWith(".otf", offset) ||

                    name.startsWith(".OTF", offset);

                if (isTT) {

                    return true;

                } else if (noType1Font) {

                    return false;

                } else {

                    return(name.startsWith(".pfa", offset) ||

                           name.startsWith(".pfb", offset) ||

                           name.startsWith(".PFA", offset) ||

                           name.startsWith(".PFB", offset));

                }

            }

        }

    }

     public static final int FONTFORMAT_NONE = -1;

     public static final int FONTFORMAT_TRUETYPE = 0;

     public static final int FONTFORMAT_TYPE1 = 1;

     public static final int FONTFORMAT_T2K = 2;

     public static final int FONTFORMAT_TTC = 3;

     public static final int FONTFORMAT_COMPOSITE = 4;

     public static final int FONTFORMAT_NATIVE = 5;

     /* Pool of 20 font file channels chosen because some UTF-8 locale

      * composite fonts can use up to 16 platform fonts (including the

      * Lucida fall back). This should prevent channel thrashing when

      * dealing with one of these fonts.

      * The pool array stores the fonts, rather than directly referencing

      * the channels, as the font needs to do the open/close work.

      */

     // MACOSX begin -- need to access these in subclass

     protected static final int CHANNELPOOLSIZE = 20;

     protected FileFont fontFileCache[] = new FileFont[CHANNELPOOLSIZE];

     // MACOSX end

     private int lastPoolIndex = 0;

    /* Need to implement a simple linked list scheme for fast

     * traversal and lookup.

     * Also want to "fast path" dialog so there's minimal overhead.

     */

    /* There are at exactly 20 composite fonts: 5 faces (but some are not

     * usually different), in 4 styles. The array may be auto-expanded

     * later if more are needed, eg for user-defined composites or locale

     * variants.

     */

    private int maxCompFont = 0;

    private CompositeFont [] compFonts = new CompositeFont[20];

    private ConcurrentHashMap<String, CompositeFont>

        compositeFonts = new ConcurrentHashMap<String, CompositeFont>();

    private ConcurrentHashMap<String, PhysicalFont>

        physicalFonts = new ConcurrentHashMap<String, PhysicalFont>();

    private ConcurrentHashMap<String, PhysicalFont>

        registeredFonts = new ConcurrentHashMap<String, PhysicalFont>();

    /* given a full name find the Font. Remind: there's duplication

     * here in that this contains the content of compositeFonts +

     * physicalFonts.

     */

    // MACOSX begin -- need to access this in subclass

    protected ConcurrentHashMap<String, Font2D>

        fullNameToFont = new ConcurrentHashMap<String, Font2D>();

    // MACOSX end

    /* TrueType fonts have localised names. Support searching all

     * of these before giving up on a name.

     */

    private HashMap<String, TrueTypeFont> localeFullNamesToFont;

    private PhysicalFont defaultPhysicalFont;

    static boolean longAddresses;

    private boolean loaded1dot0Fonts = false;

    boolean loadedAllFonts = false;

    boolean loadedAllFontFiles = false;

    HashMap<String,String> jreFontMap;

    HashSet<String> jreLucidaFontFiles;

    String[] jreOtherFontFiles;

    boolean noOtherJREFontFiles = false; // initial assumption.

    public static final String lucidaFontName = "Lucida Sans Regular";

    public static String jreLibDirName;

    public static String jreFontDirName;

    private static HashSet<String> missingFontFiles = null;

    private String defaultFontName;

    private String defaultFontFileName;

    protected HashSet<String> registeredFontFiles = new HashSet<>();

    private ArrayList<String> badFonts;

    /* fontPath is the location of all fonts on the system, excluding the

     * JRE's own font directory but including any path specified using the

     * sun.java2d.fontpath property. Together with that property,  it is

     * initialised by the getPlatformFontPath() method

     * This call must be followed by a call to registerFontDirs(fontPath)

     * once any extra debugging path has been appended.

     */

    protected String fontPath;

    private FontConfiguration fontConfig;

    /* discoveredAllFonts is set to true when all fonts on the font path are

     * discovered. This usually also implies opening, validating and

     * registering, but an implementation may be optimized to avold this.

     * So see also "loadedAllFontFiles"

     */

    private boolean discoveredAllFonts = false;

    /* No need to keep consing up new instances - reuse a singleton.

     * The trade-off is that these objects don't get GC'd.

     */

    private static final FilenameFilter ttFilter = new TTFilter();

    private static final FilenameFilter t1Filter = new T1Filter();

    private Font[] allFonts;

    private String[] allFamilies; // cache for default locale only

    private Locale lastDefaultLocale;

    public static boolean noType1Font;

    /* Used to indicate required return type from toArray(..); */

    private static String[] STR_ARRAY = new String[0];

    /**

     * Deprecated, unsupported hack - actually invokes a bug!

     * Left in for a customer, don't remove.

     */

    private boolean usePlatformFontMetrics = false;

    /**

     * Returns the global SunFontManager instance. This is similar to

     * {@link FontManagerFactory#getInstance()} but it returns a

     * SunFontManager instance instead. This is only used in internal classes

     * where we can safely assume that a SunFontManager is to be used.

     *

     * @return the global SunFontManager instance

     */

    public static SunFontManager getInstance() {

        FontManager fm = FontManagerFactory.getInstance();

        return (SunFontManager) fm;

    }

    public FilenameFilter getTrueTypeFilter() {

        return ttFilter;

    }

    public FilenameFilter getType1Filter() {

        return t1Filter;

    }

    @Override

    public boolean usingPerAppContextComposites() {

        return _usingPerAppContextComposites;

    }

    private void initJREFontMap() {

        /* Key is familyname+style value as an int.

         * Value is filename containing the font.

         * If no mapping exists, it means there is no font file for the style

         * If the mapping exists but the file doesn't exist in the deferred

         * list then it means its not installed.

         * This looks like a lot of code and strings but if it saves even

         * a single file being opened at JRE start-up there's a big payoff.

         * Lucida Sans is probably the only important case as the others

         * are rarely used. Consider removing the other mappings if there's

         * no evidence they are useful in practice.

         */

        jreFontMap = new HashMap<String,String>();

        jreLucidaFontFiles = new HashSet<String>();

        if (isOpenJDK()) {

            return;

        }

        /* Lucida Sans Family */

        jreFontMap.put("lucida sans0",   "LucidaSansRegular.ttf");

        jreFontMap.put("lucida sans1",   "LucidaSansDemiBold.ttf");

        /* Lucida Sans full names (map Bold and DemiBold to same file) */

        jreFontMap.put("lucida sans regular0", "LucidaSansRegular.ttf");

        jreFontMap.put("lucida sans regular1", "LucidaSansDemiBold.ttf");

        jreFontMap.put("lucida sans bold1", "LucidaSansDemiBold.ttf");

        jreFontMap.put("lucida sans demibold1", "LucidaSansDemiBold.ttf");

        /* Lucida Sans Typewriter Family */

        jreFontMap.put("lucida sans typewriter0",

                       "LucidaTypewriterRegular.ttf");

        jreFontMap.put("lucida sans typewriter1", "LucidaTypewriterBold.ttf");

        /* Typewriter full names (map Bold and DemiBold to same file) */

        jreFontMap.put("lucida sans typewriter regular0",

                       "LucidaTypewriter.ttf");

        jreFontMap.put("lucida sans typewriter regular1",

                       "LucidaTypewriterBold.ttf");

        jreFontMap.put("lucida sans typewriter bold1",

                       "LucidaTypewriterBold.ttf");

        jreFontMap.put("lucida sans typewriter demibold1",

                       "LucidaTypewriterBold.ttf");

        /* Lucida Bright Family */

        jreFontMap.put("lucida bright0", "LucidaBrightRegular.ttf");

        jreFontMap.put("lucida bright1", "LucidaBrightDemiBold.ttf");

        jreFontMap.put("lucida bright2", "LucidaBrightItalic.ttf");

        jreFontMap.put("lucida bright3", "LucidaBrightDemiItalic.ttf");

        /* Lucida Bright full names (map Bold and DemiBold to same file) */

        jreFontMap.put("lucida bright regular0", "LucidaBrightRegular.ttf");

        jreFontMap.put("lucida bright regular1", "LucidaBrightDemiBold.ttf");

        jreFontMap.put("lucida bright regular2", "LucidaBrightItalic.ttf");

        jreFontMap.put("lucida bright regular3", "LucidaBrightDemiItalic.ttf");

        jreFontMap.put("lucida bright bold1", "LucidaBrightDemiBold.ttf");

        jreFontMap.put("lucida bright bold3", "LucidaBrightDemiItalic.ttf");

        jreFontMap.put("lucida bright demibold1", "LucidaBrightDemiBold.ttf");

        jreFontMap.put("lucida bright demibold3","LucidaBrightDemiItalic.ttf");

        jreFontMap.put("lucida bright italic2", "LucidaBrightItalic.ttf");

        jreFontMap.put("lucida bright italic3", "LucidaBrightDemiItalic.ttf");

        jreFontMap.put("lucida bright bold italic3",

                       "LucidaBrightDemiItalic.ttf");

        jreFontMap.put("lucida bright demibold italic3",

                       "LucidaBrightDemiItalic.ttf");

        for (String ffile : jreFontMap.values()) {

            jreLucidaFontFiles.add(ffile);

        }

    }

    static {

        java.security.AccessController.doPrivileged(

                                    new java.security.PrivilegedAction<Object>() {

           public Object run() {

               FontManagerNativeLibrary.load();

               // JNI throws an exception if a class/method/field is not found,

               // so there's no need to do anything explicit here.

               initIDs();

               switch (StrikeCache.nativeAddressSize) {

               case 8: longAddresses = true; break;

               case 4: longAddresses = false; break;

               default: throw new RuntimeException("Unexpected address size");

               }

               noType1Font =

                   "true".equals(System.getProperty("sun.java2d.noType1Font"));

               jreLibDirName =

                   System.getProperty("java.home","") + File.separator + "lib";

               jreFontDirName = jreLibDirName + File.separator + "fonts";

               File lucidaFile =

                   new File(jreFontDirName + File.separator + FontUtilities.LUCIDA_FILE_NAME);

               return null;

           }

        });

    }

    public TrueTypeFont getEUDCFont() {

        // Overridden in Windows.

        return null;

    }

    /* Initialise ptrs used by JNI methods */

    private static native void initIDs();

    @SuppressWarnings("unchecked")

    protected SunFontManager() {

        initJREFontMap();

        java.security.AccessController.doPrivileged(

                new java.security.PrivilegedAction<Object>() {

                    public Object run() {

                        File badFontFile =

                            new File(jreFontDirName + File.separator +

                                     "badfonts.txt");

                        if (badFontFile.exists()) {

                            FileInputStream fis = null;

                            try {

                                badFonts = new ArrayList<>();

                                fis = new FileInputStream(badFontFile);

                                InputStreamReader isr = new InputStreamReader(fis);

                                BufferedReader br = new BufferedReader(isr);

                                while (true) {

                                    String name = br.readLine();

                                    if (name == null) {

                                        break;

                                    } else {

                                        if (FontUtilities.debugFonts()) {

                                            FontUtilities.getLogger().warning("read bad font: " +

                                                           name);

                                        }

                                        badFonts.add(name);

                                    }

                                }

                            } catch (IOException e) {

                                try {

                                    if (fis != null) {

                                        fis.close();

                                    }

                                } catch (IOException ioe) {

                                }

                            }

                        }

                        /* Here we get the fonts in jre/lib/fonts and register

                         * them so they are always available and preferred over

                         * other fonts. This needs to be registered before the

                         * composite fonts as otherwise some native font that

                         * corresponds may be found as we don't have a way to

                         * handle two fonts of the same name, so the JRE one

                         * must be the first one registered. Pass "true" to

                         * registerFonts method as on-screen these JRE fonts

                         * always go through the T2K rasteriser.

                         */

                        if (FontUtilities.isLinux) {

                            /* Linux font configuration uses these fonts */

                            registerFontDir(jreFontDirName);

                        }

                        registerFontsInDir(jreFontDirName, true, Font2D.JRE_RANK,

                                           true, false);

                        /* Create the font configuration and get any font path

                         * that might be specified.

                         */

                        fontConfig = createFontConfiguration();

                        if (isOpenJDK()) {

                            String[] fontInfo = getDefaultPlatformFont();

                            defaultFontName = fontInfo[0];

                            defaultFontFileName = fontInfo[1];

                        }

                        String extraFontPath = fontConfig.getExtraFontPath();

                        /* In prior releases the debugging font path replaced

                         * all normally located font directories except for the

                         * JRE fonts dir. This directory is still always located

                         * and placed at the head of the path but as an

                         * augmentation to the previous behaviour the

                         * changes below allow you to additionally append to

                         * the font path by starting with append: or prepend by

                         * starting with a prepend: sign. Eg: to append

                         * -Dsun.java2d.fontpath=append:/usr/local/myfonts

                         * and to prepend

                         * -Dsun.java2d.fontpath=prepend:/usr/local/myfonts Disp

                         *

                         * If there is an appendedfontpath it in the font

                         * configuration it is used instead of searching the

                         * system for dirs.

                         * The behaviour of append and prepend is then similar

                         * to the normal case. ie it goes after what

                         * you prepend and * before what you append. If the

                         * sun.java2d.fontpath property is used, but it

                         * neither the append or prepend syntaxes is used then

                         * as except for the JRE dir the path is replaced and it

                         * is up to you to make sure that all the right

                         * directories are located. This is platform and

                         * locale-specific so its almost impossible to get

                         * right, so it should be used with caution.

                         */

                        boolean prependToPath = false;

                        boolean appendToPath = false;

                        String dbgFontPath =

                            System.getProperty("sun.java2d.fontpath");

                        if (dbgFontPath != null) {

                            if (dbgFontPath.startsWith("prepend:")) {

                                prependToPath = true;

                                dbgFontPath =

                                    dbgFontPath.substring("prepend:".length());

                            } else if (dbgFontPath.startsWith("append:")) {

                                appendToPath = true;

                                dbgFontPath =

                                    dbgFontPath.substring("append:".length());

                            }

                        }

                        if (FontUtilities.debugFonts()) {

                            PlatformLogger logger = FontUtilities.getLogger();

                            logger.info("JRE font directory: " + jreFontDirName);

                            logger.info("Extra font path: " + extraFontPath);

                            logger.info("Debug font path: " + dbgFontPath);

                        }

                        if (dbgFontPath != null) {

                            /* In debugging mode we register all the paths

                             * Caution: this is a very expensive call on Solaris:-

                             */

                            fontPath = getPlatformFontPath(noType1Font);

                            if (extraFontPath != null) {

                                fontPath =

                                    extraFontPath + File.pathSeparator + fontPath;

                            }

                            if (appendToPath) {

                                fontPath =

                                    fontPath + File.pathSeparator + dbgFontPath;

                            } else if (prependToPath) {

                                fontPath =

                                    dbgFontPath + File.pathSeparator + fontPath;

                            } else {

                                fontPath = dbgFontPath;

                            }

                            registerFontDirs(fontPath);

                        } else if (extraFontPath != null) {

                            /* If the font configuration contains an

                             * "appendedfontpath" entry, it is interpreted as a

                             * set of locations that should always be registered.

                             * It may be additional to locations normally found

                             * for that place, or it may be locations that need