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+/* XEventPump.java -- Pumps events from X to AWT
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.awt.peer.x;
+
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.Window;
+import java.awt.event.ComponentEvent;
+import java.awt.event.KeyEvent;
+import java.awt.event.MouseEvent;
+import java.awt.event.PaintEvent;
+import java.util.HashMap;
+
+import gnu.x11.Display;
+import gnu.x11.event.ButtonPress;
+import gnu.x11.event.ButtonRelease;
+import gnu.x11.event.ConfigureNotify;
+import gnu.x11.event.Event;
+import gnu.x11.event.Expose;
+import gnu.x11.event.Input;
+import gnu.x11.event.KeyPress;
+import gnu.x11.event.KeyRelease;
+import gnu.x11.event.MotionNotify;
+
+/**
+ * Fetches events from X, translates them to AWT events and pumps them up
+ * into the AWT event queue.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public class XEventPump
+ implements Runnable
+{
+
+ /**
+ * The X Display from which we fetch and pump up events.
+ */
+ private Display display;
+
+ /**
+ * Maps X Windows to AWT Windows to be able to correctly determine the
+ * event targets.
+ */
+ private HashMap windows;
+
+ /**
+ * Indicates if we are currently inside a drag operation. This is
+ * set to the button ID when a button is pressed and to -1 (indicating
+ * that no drag is active) when the mouse is released.
+ */
+ private int drag;
+
+ /**
+ * Creates a new XEventPump for the specified X Display.
+ *
+ * @param d the X Display
+ */
+ XEventPump(Display d)
+ {
+ display = d;
+ windows = new HashMap();
+ drag = -1;
+ Thread t = new Thread(this);
+ t.start();
+ }
+
+ /**
+ * The main event pump loop. This basically fetches events from the
+ * X Display and pumps them into the system event queue.
+ */
+ public void run()
+ {
+ while (display.connected)
+ {
+ try
+ {
+ Event xEvent = display.next_event();
+ handleEvent(xEvent);
+ }
+ catch (ThreadDeath death)
+ {
+ // If someone wants to kill us, let them.
+ return;
+ }
+ catch (Throwable x)
+ {
+ System.err.println("Exception during event dispatch:");
+ x.printStackTrace(System.err);
+ }
+ }
+ }
+
+ /**
+ * Adds an X Window to AWT Window mapping. This is required so that the
+ * event pump can correctly determine the event targets.
+ *
+ * @param xWindow the X Window
+ * @param awtWindow the AWT Window
+ */
+ void registerWindow(gnu.x11.Window xWindow, Window awtWindow)
+ {
+ if (XToolkit.DEBUG)
+ System.err.println("registering window id: " + xWindow.id);
+ windows.put(new Integer(xWindow.id), awtWindow);
+ }
+
+ void unregisterWindow(gnu.x11.Window xWindow)
+ {
+ windows.remove(new Integer(xWindow.id));
+ }
+
+ private void handleEvent(Event xEvent)
+ {
+ Integer key = new Integer(xEvent.window_id());;
+ Window awtWindow = (Window) windows.get(key);
+
+ if (XToolkit.DEBUG)
+ System.err.println("fetched event: " + xEvent);
+ switch (xEvent.code())
+ {
+ case ButtonPress.CODE:
+ ButtonPress bp = (ButtonPress) xEvent;
+ // Create and post the mouse event.
+ int button = bp.detail();
+ drag = button;
+ MouseEvent mp = new MouseEvent(awtWindow, MouseEvent.MOUSE_PRESSED,
+ System.currentTimeMillis(), 0,
+ bp.event_x(), bp.event_y(),
+ 1, false, button);
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mp);
+ break;
+ case ButtonRelease.CODE:
+ ButtonRelease br = (ButtonRelease) xEvent;
+ drag = -1;
+ MouseEvent mr = new MouseEvent(awtWindow, MouseEvent.MOUSE_RELEASED,
+ System.currentTimeMillis(), 0,
+ br.event_x(), br.event_y(),
+ 1, false, br.detail());
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mr);
+ break;
+ case MotionNotify.CODE:
+ MotionNotify mn = (MotionNotify) xEvent;
+ MouseEvent mm;
+ if (drag == -1)
+ {
+ mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_MOVED,
+ System.currentTimeMillis(), 0,
+ mn.event_x(), mn.event_y(),
+ 1, false);
+ }
+ else
+ {
+ mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_DRAGGED,
+ System.currentTimeMillis(), 0,
+ mn.event_x(), mn.event_y(),
+ 1, false);
+ }
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mm);
+ break;
+ case ConfigureNotify.CODE:
+ ConfigureNotify c = (ConfigureNotify) xEvent;
+ if (XToolkit.DEBUG)
+ System.err.println("resize request for window id: " + key);
+
+ // Detect and report size changes.
+ if (c.width() != awtWindow.getWidth()
+ || c.height() != awtWindow.getHeight())
+ {
+ if (XToolkit.DEBUG)
+ System.err.println("Setting size on AWT window: " + c.width()
+ + ", " + c.height() + ", " + awtWindow.getWidth()
+ + ", " + awtWindow.getHeight());
+ ((XFramePeer) awtWindow.getPeer()).callback = true;
+ awtWindow.setSize(c.width(), c.height());
+ ((XFramePeer) awtWindow.getPeer()).callback = false;
+ }
+ break;
+ case Expose.CODE:
+ Expose exp = (Expose) xEvent;
+ if (XToolkit.DEBUG)
+ System.err.println("expose request for window id: " + key);
+ Rectangle r = new Rectangle(exp.x(), exp.y(), exp.width(),
+ exp.height());
+ //System.err.println("expose paint: " + r);
+ // We need to clear the background of the exposed rectangle.
+ Graphics g = awtWindow.getGraphics();
+ g.clearRect(r.x, r.y, r.width, r.height);
+ g.dispose();
+ PaintEvent pev = new PaintEvent(awtWindow, PaintEvent.PAINT, r);
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(pev);
+ break;
+ case KeyPress.CODE:
+ case KeyRelease.CODE:
+ handleKeyEvent(xEvent, awtWindow);
+ break;
+ default:
+ if (XToolkit.DEBUG)
+ System.err.println("Unhandled X event: " + xEvent);
+ }
+ }
+
+ /**
+ * Handles key events from X.
+ *
+ * @param xEvent the X event
+ * @param awtWindow the AWT window to which the event gets posted
+ */
+ private void handleKeyEvent(Event xEvent, Window awtWindow)
+ {
+ Input keyEvent = (Input) xEvent;
+ int xKeyCode = keyEvent.detail();
+ int xMods = keyEvent.state();
+ int keyCode = KeyboardMapping.mapToKeyCode(xEvent.display.input, xKeyCode,
+ xMods);
+ char keyChar = KeyboardMapping.mapToKeyChar(xEvent.display.input, xKeyCode,
+ xMods);
+ if (XToolkit.DEBUG)
+ System.err.println("XEventPump.handleKeyEvent: " + xKeyCode + ", "
+ + xMods + ": " + ((int) keyChar) + ", " + keyCode);
+ int awtMods = KeyboardMapping.mapModifiers(xMods);
+ long when = System.currentTimeMillis();
+ KeyEvent ke;
+ if (keyEvent.code() == KeyPress.CODE)
+ {
+ ke = new KeyEvent(awtWindow, KeyEvent.KEY_PRESSED, when,
+ awtMods, keyCode,
+ KeyEvent.CHAR_UNDEFINED);
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke);
+ if (keyChar != KeyEvent.CHAR_UNDEFINED)
+ {
+ ke = new KeyEvent(awtWindow, KeyEvent.KEY_TYPED, when,
+ awtMods, KeyEvent.VK_UNDEFINED,
+ keyChar);
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke);
+ }
+
+ }
+ else
+ {
+ ke = new KeyEvent(awtWindow, KeyEvent.KEY_RELEASED, when,
+ awtMods, keyCode,
+ KeyEvent.CHAR_UNDEFINED);
+ Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(ke);
+ }
+
+ }
+
+
+}
+