| /* |
| * Copyright 2002-2007 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package sun.awt; |
| |
| import java.awt.Component; |
| import java.awt.Container; |
| import java.awt.AWTEvent; |
| import java.awt.Font; |
| import java.awt.Color; |
| import java.awt.Cursor; |
| import java.awt.Point; |
| |
| import java.awt.peer.ComponentPeer; |
| |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.InvocationTargetException; |
| |
| import sun.util.logging.PlatformLogger; |
| |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| |
| /** |
| * A collection of methods for modifying package private fields in AWT components. |
| * This class is meant to be used by Peer code only. Previously peer code |
| * got around this problem by modifying fields from native code. However |
| * as we move away from native code to Pure-java peers we need this class. |
| * |
| * @author Bino George |
| */ |
| |
| |
| public class ComponentAccessor |
| { |
| private static Class componentClass; |
| private static Field fieldX; |
| private static Field fieldY; |
| private static Field fieldWidth; |
| private static Field fieldHeight; |
| private static Method methodGetParentNoClientCode; |
| private static Method methodGetFontNoClientCode; |
| private static Method methodProcessEvent; |
| private static Method methodEnableEvents; |
| private static Field fieldParent; |
| private static Field fieldBackground; |
| private static Field fieldForeground; |
| private static Field fieldFont; |
| private static Field fieldPacked; |
| private static Field fieldIgnoreRepaint; |
| private static Field fieldPeer; |
| private static Field fieldVisible; |
| private static Method methodIsEnabledImpl; |
| private static Method methodGetCursorNoClientCode; |
| private static Method methodLocationNoClientCode; |
| |
| private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.ComponentAccessor"); |
| |
| private ComponentAccessor() { |
| } |
| |
| static { |
| AccessController.doPrivileged( new PrivilegedAction() { |
| public Object run() { |
| try { |
| componentClass = Class.forName("java.awt.Component"); |
| fieldX = componentClass.getDeclaredField("x"); |
| fieldX.setAccessible(true); |
| fieldY = componentClass.getDeclaredField("y"); |
| fieldY.setAccessible(true); |
| fieldWidth = componentClass.getDeclaredField("width"); |
| fieldWidth.setAccessible(true); |
| fieldHeight = componentClass.getDeclaredField("height"); |
| fieldHeight.setAccessible(true); |
| fieldForeground = componentClass.getDeclaredField("foreground"); |
| fieldForeground.setAccessible(true); |
| fieldBackground = componentClass.getDeclaredField("background"); |
| fieldBackground.setAccessible(true); |
| fieldFont = componentClass.getDeclaredField("font"); |
| fieldFont.setAccessible(true); |
| methodGetParentNoClientCode = componentClass.getDeclaredMethod("getParent_NoClientCode", (Class[]) null); |
| methodGetParentNoClientCode.setAccessible(true); |
| methodGetFontNoClientCode = componentClass.getDeclaredMethod("getFont_NoClientCode", (Class[]) null); |
| methodGetFontNoClientCode.setAccessible(true); |
| Class[] argTypes = { AWTEvent.class }; |
| methodProcessEvent = componentClass.getDeclaredMethod("processEvent",argTypes); |
| methodProcessEvent.setAccessible(true); |
| Class[] argTypesForMethodEnableEvents = { Long.TYPE }; |
| methodEnableEvents = componentClass.getDeclaredMethod("enableEvents",argTypesForMethodEnableEvents); |
| methodEnableEvents.setAccessible(true); |
| |
| fieldParent = componentClass.getDeclaredField("parent"); |
| fieldParent.setAccessible(true); |
| fieldPacked = componentClass.getDeclaredField("isPacked"); |
| fieldPacked.setAccessible(true); |
| fieldIgnoreRepaint = componentClass.getDeclaredField("ignoreRepaint"); |
| fieldIgnoreRepaint.setAccessible(true); |
| |
| fieldPeer = componentClass.getDeclaredField("peer"); |
| fieldPeer.setAccessible(true); |
| |
| fieldVisible = componentClass.getDeclaredField("visible"); |
| fieldVisible.setAccessible(true); |
| |
| methodIsEnabledImpl = componentClass.getDeclaredMethod("isEnabledImpl", (Class[]) null); |
| methodIsEnabledImpl.setAccessible(true); |
| |
| methodGetCursorNoClientCode = componentClass.getDeclaredMethod("getCursor_NoClientCode", (Class[]) null); |
| methodGetCursorNoClientCode.setAccessible(true); |
| |
| methodLocationNoClientCode = componentClass.getDeclaredMethod("location_NoClientCode", (Class[]) null); |
| methodLocationNoClientCode.setAccessible(true); |
| } |
| catch (NoSuchFieldException e) { |
| log.fine("Unable to initialize ComponentAccessor", e); |
| } |
| catch (ClassNotFoundException e) { |
| log.fine("Unable to initialize ComponentAccessor", e); |
| } |
| catch (NoSuchMethodException e) { |
| log.fine("Unable to initialize ComponentAccessor", e); |
| } |
| // to please javac |
| return null; |
| } |
| }); |
| } |
| |
| public static void setX(Component c, int x) |
| { |
| try { |
| fieldX.setInt(c,x); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static void setY(Component c, int y) |
| { |
| try { |
| fieldY.setInt(c,y); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static void setWidth(Component c, int width) |
| { |
| try { |
| fieldWidth.setInt(c,width); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static void setHeight(Component c, int height) |
| { |
| try { |
| fieldHeight.setInt(c,height); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static void setBounds(Component c, int x, int y, int width, int height) |
| { |
| try { |
| fieldX.setInt(c,x); |
| fieldY.setInt(c,y); |
| fieldWidth.setInt(c,width); |
| fieldHeight.setInt(c,height); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static int getX(Component c) { |
| try { |
| return fieldX.getInt(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return 0; |
| } |
| |
| public static int getY(Component c) { |
| try { |
| return fieldY.getInt(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return 0; |
| } |
| |
| public static int getWidth(Component c) { |
| try { |
| return fieldWidth.getInt(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return 0; |
| } |
| |
| public static int getHeight(Component c) { |
| try { |
| return fieldHeight.getInt(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return 0; |
| } |
| |
| public static boolean getIsPacked(Component c) { |
| try { |
| return fieldPacked.getBoolean(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return false; |
| } |
| |
| public static Container getParent_NoClientCode(Component c) { |
| Container parent=null; |
| |
| try { |
| parent = (Container) methodGetParentNoClientCode.invoke(c, (Object[]) null); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| |
| return parent; |
| } |
| |
| public static Font getFont_NoClientCode(Component c) { |
| Font font=null; |
| |
| try { |
| font = (Font) methodGetFontNoClientCode.invoke(c, (Object[]) null); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| |
| return font; |
| } |
| |
| public static void processEvent(Component c, AWTEvent event) { |
| Font font=null; |
| |
| try { |
| Object[] args = new Object[1]; |
| args[0] = event; |
| methodProcessEvent.invoke(c,args); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| } |
| |
| public static void enableEvents(Component c, long event_mask) { |
| try { |
| Object[] args = new Object[1]; |
| args[0] = Long.valueOf(event_mask); |
| methodEnableEvents.invoke(c,args); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| } |
| |
| public static void setParent(Component c, Container parent) |
| { |
| try { |
| fieldParent.set(c,parent); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static Color getForeground(Component c) |
| { |
| Color color = null; |
| try { |
| color = (Color) fieldForeground.get(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return color; |
| } |
| |
| public static Color getBackground(Component c) |
| { |
| Color color = null; |
| try { |
| color = (Color) fieldBackground.get(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return color; |
| } |
| |
| public static void setBackground(Component c, Color color) { |
| try { |
| fieldBackground.set(c, color); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static Font getFont(Component c) |
| { |
| Font f = null; |
| try { |
| f = (Font) fieldFont.get(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return f; |
| } |
| |
| public static ComponentPeer getPeer(Component c) { |
| ComponentPeer peer = null; |
| try { |
| peer = (ComponentPeer)fieldPeer.get(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return peer; |
| } |
| |
| public static void setPeer(Component c, ComponentPeer peer) { |
| try { |
| fieldPeer.set(c, peer); |
| } catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| } |
| |
| public static boolean getIgnoreRepaint(Component comp) { |
| try { |
| return fieldIgnoreRepaint.getBoolean(comp); |
| } |
| catch (IllegalAccessException e) { |
| log.fine("Unable to access the Component object", e); |
| } |
| |
| return false; |
| } |
| |
| public static boolean getVisible(Component c) { |
| try { |
| return fieldVisible.getBoolean(c); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| return false; |
| } |
| |
| public static boolean isEnabledImpl(Component c) { |
| boolean enabled = true; |
| try { |
| enabled = (Boolean) methodIsEnabledImpl.invoke(c, (Object[]) null); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| return enabled; |
| } |
| |
| public static Cursor getCursor_NoClientCode(Component c) { |
| Cursor cursor = null; |
| |
| try { |
| cursor = (Cursor) methodGetCursorNoClientCode.invoke(c, (Object[]) null); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| |
| return cursor; |
| } |
| |
| public static Point getLocation_NoClientCode(Component c) { |
| Point loc = null; |
| |
| try { |
| loc = (Point) methodLocationNoClientCode.invoke(c, (Object[]) null); |
| } |
| catch (IllegalAccessException e) |
| { |
| log.fine("Unable to access the Component object", e); |
| } |
| catch (InvocationTargetException e) { |
| log.fine("Unable to invoke on the Component object", e); |
| } |
| |
| return loc; |
| } |
| |
| } |