/*

 * Copyright (c) 2002, 2014, 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.awt.X11;

/**

 * XAtom is a class that allows you to create and modify X Window properties.

 * An X Atom is an identifier for a property that you can set on any X Window.

 * Standard X Atom are defined by X11 and these atoms are defined in this class

 * for convenience. Common X Atoms like <code>XA_WM_NAME</code> are used to communicate with the

 * Window manager to let it know the Window name. The use and protocol for these

 * atoms are defined in the Inter client communications converntions manual.

 * User specified XAtoms are defined by specifying a name that gets Interned

 * by the XServer and an <code>XAtom</code> object is returned. An <code>XAtom</code> can also be created

 * by using a pre-exisiting atom like <code>XA_WM_CLASS</code>. A <code>display</code> has to be specified

 * in order to create an <code>XAtom</code>. <p> <p>

 *

 * Once an <code>XAtom</code> instance is created, you can call get and set property methods to

 * set the values for a particular window. <p> <p>

 *

 *

 * Example usage : To set the window name for a top level: <p>

 * <code>

 * XAtom xa = new XAtom(display,XAtom.XA_WM_NAME); <p>

 * xa.setProperty(window,"Hello World");<p></code>

 *<p>

 *<p>

 * To get the cut buffer :<p>

 * <p><code>

 * XAtom xa = new XAtom(display,XAtom.XA_CUT_BUFFER0);<p>

 * String selection = xa.getProperty(root_window);<p></code>

 * @author  Bino George

 * @since       1.5

 */

import sun.misc.Unsafe;

import java.util.HashMap;

public final class XAtom {

    // Order of lock:  XAWTLock -> XAtom.class

    /* Predefined Atoms - automatically extracted from XAtom.h */

    private static Unsafe unsafe = XlibWrapper.unsafe;

    private static XAtom[] emptyList = new XAtom[0];

    public static final long XA_PRIMARY=1;

    public static final long XA_SECONDARY=2;

    public static final long XA_ARC=3;

    public static final long XA_ATOM=4;

    public static final long XA_BITMAP=5;

    public static final long XA_CARDINAL=6;

    public static final long XA_COLORMAP=7;

    public static final long XA_CURSOR=8;

    public static final long XA_CUT_BUFFER0=9;

    public static final long XA_CUT_BUFFER1=10;

    public static final long XA_CUT_BUFFER2=11;

    public static final long XA_CUT_BUFFER3=12;

    public static final long XA_CUT_BUFFER4=13;

    public static final long XA_CUT_BUFFER5=14;

    public static final long XA_CUT_BUFFER6=15;

    public static final long XA_CUT_BUFFER7=16;

    public static final long XA_DRAWABLE=17;

    public static final long XA_FONT=18;

    public static final long XA_INTEGER=19;

    public static final long XA_PIXMAP=20;

    public static final long XA_POINT=21;

    public static final long XA_RECTANGLE=22;

    public static final long XA_RESOURCE_MANAGER=23;

    public static final long XA_RGB_COLOR_MAP=24;

    public static final long XA_RGB_BEST_MAP=25;

    public static final long XA_RGB_BLUE_MAP=26;

    public static final long XA_RGB_DEFAULT_MAP=27;

    public static final long XA_RGB_GRAY_MAP=28;

    public static final long XA_RGB_GREEN_MAP=29;

    public static final long XA_RGB_RED_MAP=30;

    public static final long XA_STRING=31;

    public static final long XA_VISUALID=32;

    public static final long XA_WINDOW=33;

    public static final long XA_WM_COMMAND=34;

    public static final long XA_WM_HINTS=35;

    public static final long XA_WM_CLIENT_MACHINE=36;

    public static final long XA_WM_ICON_NAME=37;

    public static final long XA_WM_ICON_SIZE=38;

    public static final long XA_WM_NAME=39;

    public static final long XA_WM_NORMAL_HINTS=40;

    public static final long XA_WM_SIZE_HINTS=41;

    public static final long XA_WM_ZOOM_HINTS=42;

    public static final long XA_MIN_SPACE=43;

    public static final long XA_NORM_SPACE=44;

    public static final long XA_MAX_SPACE=45;

    public static final long XA_END_SPACE=46;

    public static final long XA_SUPERSCRIPT_X=47;

    public static final long XA_SUPERSCRIPT_Y=48;

    public static final long XA_SUBSCRIPT_X=49;

    public static final long XA_SUBSCRIPT_Y=50;

    public static final long XA_UNDERLINE_POSITION=51;

    public static final long XA_UNDERLINE_THICKNESS=52 ;

    public static final long XA_STRIKEOUT_ASCENT=53;

    public static final long XA_STRIKEOUT_DESCENT=54;

    public static final long XA_ITALIC_ANGLE=55;

    public static final long XA_X_HEIGHT=56;

    public static final long XA_QUAD_WIDTH=57;

    public static final long XA_WEIGHT=58;

    public static final long XA_POINT_SIZE=59;

    public static final long XA_RESOLUTION=60;

    public static final long XA_COPYRIGHT=61;

    public static final long XA_NOTICE=62;

    public static final long XA_FONT_NAME=63;

    public static final long XA_FAMILY_NAME=64;

    public static final long XA_FULL_NAME=65;

    public static final long XA_CAP_HEIGHT=66;

    public static final long XA_WM_CLASS=67;

    public static final long XA_WM_TRANSIENT_FOR=68;

    public static final long XA_LAST_PREDEFINED=68;

    static HashMap<Long, XAtom> atomToAtom = new HashMap<Long, XAtom>();

    static HashMap<String, XAtom> nameToAtom = new HashMap<String, XAtom>();

    static void register(XAtom at) {

        if (at == null) {

            return;

        }

        synchronized (XAtom.class) {

            if (at.atom != 0) {

                atomToAtom.put(Long.valueOf(at.atom), at);

            }

            if (at.name != null) {

                nameToAtom.put(at.name, at);

            }

        }

    }

    static XAtom lookup(long atom) {

        synchronized (XAtom.class) {

            return atomToAtom.get(Long.valueOf(atom));

        }

    }

    static XAtom lookup(String name) {

        synchronized (XAtom.class) {

            return nameToAtom.get(name);

        }

    }

    /*

     * [das]Suggestion:

     * 1.Make XAtom immutable.

     * 2.Replace public ctors with factory methods (e.g. get() below).

     */

    static XAtom get(long atom) {

        XAtom xatom = lookup(atom);

        if (xatom == null) {

            xatom = new XAtom(XToolkit.getDisplay(), atom);

        }

        return xatom;

    }

    public static XAtom get(String name) {

        XAtom xatom = lookup(name);

        if (xatom == null) {

            xatom = new XAtom(XToolkit.getDisplay(), name);

        }

        return xatom;

    }

    public String getName() {

        if (name == null) {

            XToolkit.awtLock();

            try {

                this.name = XlibWrapper.XGetAtomName(display, atom);

            } finally {

                XToolkit.awtUnlock();

            }

            register();

        }

        return name;

    }

    static String asString(long atom) {

        XAtom at = lookup(atom);

        if (at == null) {

            return Long.toString(atom);

        } else {

            return at.toString();

        }

    }

    void register() {

        register(this);

    }

    public String toString() {

        if (name != null) {

            return name + ":" + atom;

        } else {

            return Long.toString(atom);

        }

    }

    /* interned value of Atom */

    long atom = 0;

    /* name of atom */

    String name;

    /* display for X connection */

    long display;

    /**  This constructor will create and intern a new XAtom that is specified

     *  by the supplied name.

     *

     * @param display X display to use

     * @param name name of the XAtom to create.

     * @since 1.5

     */

    private XAtom(long display, String name) {

        this(display, name, true);

    }

    public XAtom(String name, boolean autoIntern) {

        this(XToolkit.getDisplay(), name, autoIntern);

    }

    /**  This constructor will create an instance of XAtom that is specified

     *  by the predefined XAtom specified by u <code> latom </code>

     *

     * @param display X display to use.

     * @param atom a predefined XAtom.

     * @since 1.5

     */

    public XAtom(long display, long atom) {

        this.atom = atom;

        this.display = display;

        register();

    }

    /**  This constructor will create the instance,

     *  and if <code>autoIntern</code> is true intern a new XAtom that is specified

     *  by the supplied name.

     *

     * @param display X display to use

     * @param name name of the XAtom to create.

     * @since 1.5

     */

    private XAtom(long display, String name, boolean autoIntern) {

        this.name = name;

        this.display = display;

        if (autoIntern) {

            XToolkit.awtLock();

            try {

                atom = XlibWrapper.InternAtom(display,name,0);

            } finally {

                XToolkit.awtUnlock();

            }

        }

        register();

    }

    /**

     * Creates uninitialized instance of

     */

    public XAtom() {

    }

    /**  Sets the window property for the specified window

     * @param window window id to use

     * @param str value to set to.

     * @since 1.5

     */

    public void setProperty(long window, String str) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        XToolkit.awtLock();

        try {

            XlibWrapper.SetProperty(display,window,atom,str);

        } finally {

            XToolkit.awtUnlock();

        }

    }

    /**

     * Sets UTF8_STRING type property. Explicitly converts str to UTF-8 byte sequence.

     */

    public void setPropertyUTF8(long window, String str) {

        XAtom XA_UTF8_STRING = XAtom.get("UTF8_STRING");   /* like STRING but encoding is UTF-8 */

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        byte[] bdata = null;

        try {

            bdata = str.getBytes("UTF-8");

        } catch (java.io.UnsupportedEncodingException uee) {

            uee.printStackTrace();

        }

        if (bdata != null) {

            setAtomData(window, XA_UTF8_STRING.atom, bdata);

        }

    }

    /**

     * Sets STRING/8 type property. Explicitly converts str to Latin-1 byte sequence.

     */

    public void setProperty8(long window, String str) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        byte[] bdata = null;

        try {

            bdata = str.getBytes("ISO-8859-1");

        } catch (java.io.UnsupportedEncodingException uee) {

            uee.printStackTrace();

        }

        if (bdata != null) {

            setAtomData(window, XA_STRING, bdata);

        }

    }

    /**  Gets the window property for the specified window

     * @param window window id to use

     * @return string with the property.

     * @since 1.5

     */

    public String getProperty(long window) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        XToolkit.awtLock();

        try {

            return XlibWrapper.GetProperty(display,window,atom);

        } finally {

            XToolkit.awtUnlock();

        }

    }

    /*

     * Auxiliary function that returns the value of 'property' of type

     * 'property_type' on window 'window'.  Format of the property must be 32.

     */

    public long get32Property(long window, long property_type) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        WindowPropertyGetter getter =

            new WindowPropertyGetter(window, this, 0, 1,

                                     false, property_type);

        try {

            int status = getter.execute();

            if (status != XConstants.Success || getter.getData() == 0) {

                return 0;

            }

            if (getter.getActualType() != property_type || getter.getActualFormat() != 32) {

                return 0;

            }

            return Native.getCard32(getter.getData());

        } finally {

            getter.dispose();

        }

    }

    /**

     *  Returns value of property of type CARDINAL/32 of this window

     */

    public long getCard32Property(XBaseWindow window) {

        return get32Property(window.getWindow(), XA_CARDINAL);

    }

    /**

     * Sets property of type CARDINAL on the window

     */

    public void setCard32Property(long window, long value) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        XToolkit.awtLock();

        try {

            Native.putCard32(XlibWrapper.larg1, value);

            XlibWrapper.XChangeProperty(XToolkit.getDisplay(), window,

                atom, XA_CARDINAL, 32, XConstants.PropModeReplace,

                XlibWrapper.larg1, 1);

        } finally {

            XToolkit.awtUnlock();

        }

    }

    /**

     * Sets property of type CARDINAL/32 on the window

     */

    public void setCard32Property(XBaseWindow window, long value) {

        setCard32Property(window.getWindow(), value);

    }

    /**

     * Gets uninterpreted set of data from property and stores them in data_ptr.

     * Property type is the same as current atom, property is current atom.

     * Property format is 32. Property 'delete' is false.

     * Returns boolean if requested type, format, length match returned values

     * and returned data pointer is not null.

     */

    public boolean getAtomData(long window, long data_ptr, int length) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        WindowPropertyGetter getter =

            new WindowPropertyGetter(window, this, 0, (long)length,

                                     false, this);

        try {

            int status = getter.execute();

            if (status != XConstants.Success || getter.getData() == 0) {

                return false;

            }

            if (getter.getActualType() != atom

                || getter.getActualFormat() != 32

                || getter.getNumberOfItems() != length

                )

                {

                    return false;

                }

            XlibWrapper.memcpy(data_ptr, getter.getData(), length*getAtomSize());

            return true;

        } finally {

            getter.dispose();

        }

    }

    /**

     * Gets uninterpreted set of data from property and stores them in data_ptr.

     * Property type is <code>type</code>, property is current atom.

     * Property format is 32. Property 'delete' is false.

     * Returns boolean if requested type, format, length match returned values

     * and returned data pointer is not null.

     */

    public boolean getAtomData(long window, long type, long data_ptr, int length) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        WindowPropertyGetter getter =

            new WindowPropertyGetter(window, this, 0, (long)length,

                                     false, type);

        try {

            int status = getter.execute();

            if (status != XConstants.Success || getter.getData() == 0) {

                return false;

            }

            if (getter.getActualType() != type

                || getter.getActualFormat() != 32

                || getter.getNumberOfItems() != length

                )

                {

                    return false;

                }

            XlibWrapper.memcpy(data_ptr, getter.getData(), length*getAtomSize());

            return true;

        } finally {

            getter.dispose();

        }

    }

    /**

     * Sets uninterpreted set of data into property from data_ptr.

     * Property type is the same as current atom, property is current atom.

     * Property format is 32. Mode is PropModeReplace. length is a number

     * of items pointer by data_ptr.

     */

    public void setAtomData(long window, long data_ptr, int length) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        XToolkit.awtLock();

        try {

            XlibWrapper.XChangeProperty(XToolkit.getDisplay(), window,

                atom, atom, 32, XConstants.PropModeReplace,

                data_ptr, length);

        } finally {

            XToolkit.awtUnlock();

        }

    }

    /**

     * Sets uninterpreted set of data into property from data_ptr.

     * Property type is <code>type</code>, property is current atom.

     * Property format is 32. Mode is PropModeReplace. length is a number

     * of items pointer by data_ptr.

     */

    public void setAtomData(long window, long type, long data_ptr, int length) {

        if (atom == 0) {

            throw new IllegalStateException("Atom should be initialized");

        }

        checkWindow(window);

        XToolkit.awtLock();

        try {

            XlibWrapper.XChangeProperty(XToolkit.getDisplay(), window,

                atom, type, 32, XConstants.PropModeReplace,

                data_ptr, length);

        } finally {

            XToolkit.awtUnlock();

        }

    }