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/*
* Copyright (c) 1996, 2018, 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 java.awt;
import java.beans.ConstructorProperties;
import java.io.InputStream;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedExceptionAction;
import java.util.Hashtable;
import java.util.Properties;
import java.util.StringTokenizer;
import sun.awt.AWTAccessor;
import sun.util.logging.PlatformLogger;
/**
* A class to encapsulate the bitmap representation of the mouse cursor.
*
* @see Component#setCursor
* @author Amy Fowler
*/
public class Cursor implements java.io.Serializable {
/**
* The default cursor type (gets set if no cursor is defined).
*/
public static final int DEFAULT_CURSOR = 0;
/**
* The crosshair cursor type.
*/
public static final int CROSSHAIR_CURSOR = 1;
/**
* The text cursor type.
*/
public static final int TEXT_CURSOR = 2;
/**
* The wait cursor type.
*/
public static final int WAIT_CURSOR = 3;
/**
* The south-west-resize cursor type.
*/
public static final int SW_RESIZE_CURSOR = 4;
/**
* The south-east-resize cursor type.
*/
public static final int SE_RESIZE_CURSOR = 5;
/**
* The north-west-resize cursor type.
*/
public static final int NW_RESIZE_CURSOR = 6;
/**
* The north-east-resize cursor type.
*/
public static final int NE_RESIZE_CURSOR = 7;
/**
* The north-resize cursor type.
*/
public static final int N_RESIZE_CURSOR = 8;
/**
* The south-resize cursor type.
*/
public static final int S_RESIZE_CURSOR = 9;
/**
* The west-resize cursor type.
*/
public static final int W_RESIZE_CURSOR = 10;
/**
* The east-resize cursor type.
*/
public static final int E_RESIZE_CURSOR = 11;
/**
* The hand cursor type.
*/
public static final int HAND_CURSOR = 12;
/**
* The move cursor type.
*/
public static final int MOVE_CURSOR = 13;
/**
* @deprecated As of JDK version 1.7, the {@link #getPredefinedCursor(int)}
* method should be used instead.
*/
@Deprecated
protected static Cursor[] predefined = new Cursor[14];
/**
* This field is a private replacement for 'predefined' array.
*/
private static final Cursor[] predefinedPrivate = new Cursor[14];
/* Localization names and default values */
static final String[][] cursorProperties = {
{ "AWT.DefaultCursor", "Default Cursor" },
{ "AWT.CrosshairCursor", "Crosshair Cursor" },
{ "AWT.TextCursor", "Text Cursor" },
{ "AWT.WaitCursor", "Wait Cursor" },
{ "AWT.SWResizeCursor", "Southwest Resize Cursor" },
{ "AWT.SEResizeCursor", "Southeast Resize Cursor" },
{ "AWT.NWResizeCursor", "Northwest Resize Cursor" },
{ "AWT.NEResizeCursor", "Northeast Resize Cursor" },
{ "AWT.NResizeCursor", "North Resize Cursor" },
{ "AWT.SResizeCursor", "South Resize Cursor" },
{ "AWT.WResizeCursor", "West Resize Cursor" },
{ "AWT.EResizeCursor", "East Resize Cursor" },
{ "AWT.HandCursor", "Hand Cursor" },
{ "AWT.MoveCursor", "Move Cursor" },
};
/**
* The chosen cursor type initially set to
* the {@code DEFAULT_CURSOR}.
*
* @serial
* @see #getType()
*/
int type = DEFAULT_CURSOR;
/**
* The type associated with all custom cursors.
*/
public static final int CUSTOM_CURSOR = -1;
/*
* hashtable, resource prefix, filename, and properties for custom cursors
* support
*/
private static final Hashtable<String,Cursor> systemCustomCursors = new Hashtable<>(1);
private static final String RESOURCE_PREFIX = "/sun/awt/resources/cursors/";
private static final String PROPERTIES_FILE = RESOURCE_PREFIX + "cursors.properties";
private static Properties systemCustomCursorProperties = null;
private static final String CURSOR_DOT_PREFIX = "Cursor.";
private static final String DOT_FILE_SUFFIX = ".File";
private static final String DOT_HOTSPOT_SUFFIX = ".HotSpot";
private static final String DOT_NAME_SUFFIX = ".Name";
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 8028237497568985504L;
private static final PlatformLogger log = PlatformLogger.getLogger("java.awt.Cursor");
static {
/* ensure that the necessary native libraries are loaded */
Toolkit.loadLibraries();
if (!GraphicsEnvironment.isHeadless()) {
initIDs();
}
AWTAccessor.setCursorAccessor(
new AWTAccessor.CursorAccessor() {
public long getPData(Cursor cursor) {
return cursor.pData;
}
public void setPData(Cursor cursor, long pData) {
cursor.pData = pData;
}
public int getType(Cursor cursor) {
return cursor.type;
}
});
}
/**
* Initialize JNI field and method IDs for fields that may be
* accessed from C.
*/
private static native void initIDs();
/**
* Hook into native data.
*/
private transient long pData;
private transient Object anchor = new Object();
static class CursorDisposer implements sun.java2d.DisposerRecord {
volatile long pData;
public CursorDisposer(long pData) {
this.pData = pData;
}
public void dispose() {
if (pData != 0) {
finalizeImpl(pData);
}
}
}
transient CursorDisposer disposer;
private void setPData(long pData) {
this.pData = pData;
if (GraphicsEnvironment.isHeadless()) {
return;
}
if (disposer == null) {
disposer = new CursorDisposer(pData);
// anchor is null after deserialization
if (anchor == null) {
anchor = new Object();
}
sun.java2d.Disposer.addRecord(anchor, disposer);
} else {
disposer.pData = pData;
}
}
/**
* The user-visible name of the cursor.
*
* @serial
* @see #getName()
*/
protected String name;
/**
* Returns a cursor object with the specified predefined type.
*
* @param type the type of predefined cursor
* @return the specified predefined cursor
* @throws IllegalArgumentException if the specified cursor type is
* invalid
*/
public static Cursor getPredefinedCursor(int type) {
if (type < Cursor.DEFAULT_CURSOR || type > Cursor.MOVE_CURSOR) {
throw new IllegalArgumentException("illegal cursor type");
}
Cursor c = predefinedPrivate[type];
if (c == null) {
predefinedPrivate[type] = c = new Cursor(type);
}
// fill 'predefined' array for backwards compatibility.
if (predefined[type] == null) {
predefined[type] = c;
}
return c;
}
/**
* Returns a system-specific custom cursor object matching the
* specified name. Cursor names are, for example: "Invalid.16x16"
*
* @param name a string describing the desired system-specific custom cursor
* @return the system specific custom cursor named
* @exception HeadlessException if
* {@code GraphicsEnvironment.isHeadless} returns true
* @exception AWTException in case of erroneous retrieving of the cursor
*/
public static Cursor getSystemCustomCursor(final String name)
throws AWTException, HeadlessException {
GraphicsEnvironment.checkHeadless();
Cursor cursor = systemCustomCursors.get(name);
if (cursor == null) {
synchronized(systemCustomCursors) {
if (systemCustomCursorProperties == null)
loadSystemCustomCursorProperties();
}
String prefix = CURSOR_DOT_PREFIX + name;
String key = prefix + DOT_FILE_SUFFIX;
if (!systemCustomCursorProperties.containsKey(key)) {
if (log.isLoggable(PlatformLogger.Level.FINER)) {
log.finer("Cursor.getSystemCustomCursor(" + name + ") returned null");
}
return null;
}
final String fileName =
systemCustomCursorProperties.getProperty(key);
final String localized = systemCustomCursorProperties.getProperty(
prefix + DOT_NAME_SUFFIX, name);
String hotspot = systemCustomCursorProperties.getProperty(prefix + DOT_HOTSPOT_SUFFIX);
if (hotspot == null)
throw new AWTException("no hotspot property defined for cursor: " + name);
StringTokenizer st = new StringTokenizer(hotspot, ",");
if (st.countTokens() != 2)
throw new AWTException("failed to parse hotspot property for cursor: " + name);
final Point hotPoint;
try {
hotPoint = new Point(Integer.parseInt(st.nextToken()),
Integer.parseInt(st.nextToken()));
} catch (NumberFormatException nfe) {
throw new AWTException("failed to parse hotspot property for cursor: " + name);
}
final Toolkit toolkit = Toolkit.getDefaultToolkit();
final String file = RESOURCE_PREFIX + fileName;
final InputStream in = AccessController.doPrivileged(
(PrivilegedAction<InputStream>) () -> {
return Cursor.class.getResourceAsStream(file);
});
try (in) {
Image image = toolkit.createImage(in.readAllBytes());
cursor = toolkit.createCustomCursor(image, hotPoint, localized);
} catch (Exception e) {
throw new AWTException(
"Exception: " + e.getClass() + " " + e.getMessage() +
" occurred while creating cursor " + name);
}
if (cursor == null) {
if (log.isLoggable(PlatformLogger.Level.FINER)) {
log.finer("Cursor.getSystemCustomCursor(" + name + ") returned null");
}
} else {
systemCustomCursors.put(name, cursor);
}
}
return cursor;
}
/**
* Return the system default cursor.
*
* @return the default cursor
*/
public static Cursor getDefaultCursor() {
return getPredefinedCursor(Cursor.DEFAULT_CURSOR);
}
/**
* Creates a new cursor object with the specified type.
* @param type the type of cursor
* @throws IllegalArgumentException if the specified cursor type
* is invalid
*/
@ConstructorProperties({"type"})
public Cursor(int type) {
if (type < Cursor.DEFAULT_CURSOR || type > Cursor.MOVE_CURSOR) {
throw new IllegalArgumentException("illegal cursor type");
}
this.type = type;
// Lookup localized name.
name = Toolkit.getProperty(cursorProperties[type][0],
cursorProperties[type][1]);
}
/**
* Creates a new custom cursor object with the specified name.<p>
* Note: this constructor should only be used by AWT implementations
* as part of their support for custom cursors. Applications should
* use Toolkit.createCustomCursor().
* @param name the user-visible name of the cursor.
* @see java.awt.Toolkit#createCustomCursor
*/
protected Cursor(String name) {
this.type = Cursor.CUSTOM_CURSOR;
this.name = name;
}
/**
* Returns the type for this cursor.
*
* @return the cursor type
*/
public int getType() {
return type;
}
/**
* Returns the name of this cursor.
* @return a localized description of this cursor.
* @since 1.2
*/
public String getName() {
return name;
}
/**
* Returns a string representation of this cursor.
* @return a string representation of this cursor.
* @since 1.2
*/
public String toString() {
return getClass().getName() + "[" + getName() + "]";
}
/*
* load the cursor.properties file
*/
private static void loadSystemCustomCursorProperties() throws AWTException {
synchronized(systemCustomCursors) {
systemCustomCursorProperties = new Properties();
try {
AccessController.doPrivileged(
(PrivilegedExceptionAction<Object>) () -> {
try (InputStream is = Cursor.class
.getResourceAsStream(PROPERTIES_FILE)) {
systemCustomCursorProperties.load(is);
}
return null;
});
} catch (Exception e) {
systemCustomCursorProperties = null;
throw new AWTException("Exception: " + e.getClass() + " " +
e.getMessage() + " occurred while loading: " +
PROPERTIES_FILE);
}
}
}
private static native void finalizeImpl(long pData);
}