diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XEventPump.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XEventPump.java | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XEventPump.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XEventPump.java new file mode 100644 index 000000000..379839196 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/peer/x/XEventPump.java @@ -0,0 +1,486 @@ +/* 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.AWTEvent; +import java.awt.Component; +import java.awt.Container; +import java.awt.Graphics; +import java.awt.Insets; +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.awt.event.WindowEvent; +import java.util.HashMap; + +import gnu.java.awt.ComponentReshapeEvent; +import gnu.x11.Atom; +import gnu.x11.Display; +import gnu.x11.event.ButtonPress; +import gnu.x11.event.ButtonRelease; +import gnu.x11.event.ClientMessage; +import gnu.x11.event.ConfigureNotify; +import gnu.x11.event.DestroyNotify; +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; +import gnu.x11.event.PropertyNotify; +import gnu.x11.event.ResizeRequest; +import gnu.x11.event.UnmapNotify; + +/** + * 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 thread = new Thread(this, "X Event Pump"); + thread.setDaemon(true); + thread.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 handleButtonPress(ButtonPress event) + { + Integer key = new Integer(event.getEventWindowID()); + Window awtWindow = (Window) windows.get(key); + + // Create and post the mouse event. + int button = event.detail(); + + // AWT cannot handle more than 3 buttons and expects 0 instead. + if (button >= gnu.x11.Input.BUTTON3) + button = 0; + drag = button; + + Component target = + findMouseEventTarget(awtWindow, event.getEventX(), event.getEventY()); + if(target == null) + { + target = awtWindow; + } + + MouseEvent mp = new MouseEvent(target, MouseEvent.MOUSE_PRESSED, + System.currentTimeMillis(), + KeyboardMapping.mapModifiers(event.getState()) + | buttonToModifier(button), + event.getEventX(), event.getEventY(), + 1, false, button); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mp); + } + + private void handleButtonRelease(ButtonRelease event) + { + Integer key = new Integer(event.getEventWindowID()); + Window awtWindow = (Window) windows.get(key); + + int button = event.detail(); + + // AWT cannot handle more than 3 buttons and expects 0 instead. + if (button >= gnu.x11.Input.BUTTON3) + button = 0; + drag = -1; + + Component target = + findMouseEventTarget(awtWindow, event.getEventX(), event.getEventY()); + if(target == null) + { + target = awtWindow; + } + + MouseEvent mr = new MouseEvent(target, MouseEvent.MOUSE_RELEASED, + System.currentTimeMillis(), + KeyboardMapping.mapModifiers(event.getState()) + | buttonToModifier(button), + event.getEventX(), event.getEventY(), + 1, false, button); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mr); + } + + + private void handleMotionNotify(MotionNotify event) + { + Integer key = new Integer(event.getEventWindowID()); + Window awtWindow = (Window) windows.get(key); + + int button = event.detail(); + + // AWT cannot handle more than 3 buttons and expects 0 instead. + if (button >= gnu.x11.Input.BUTTON3) + button = 0; + + MouseEvent mm = null; + if (drag == -1) + { + mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_MOVED, + System.currentTimeMillis(), + KeyboardMapping.mapModifiers(event.getState()) + | buttonToModifier(button), + event.getEventX(), event.getEventY(), + 1, false); + + } + else + { + mm = new MouseEvent(awtWindow, MouseEvent.MOUSE_DRAGGED, + System.currentTimeMillis(), + KeyboardMapping.mapModifiers(event.getState()) + | buttonToModifier(drag), + event.getEventX(), event.getEventY(), + 1, false); + } + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(mm); + } + + // FIME: refactor and make faster, maybe caching the event and handle + // and/or check timing (timing is generated for PropertyChange)? + private void handleExpose(Expose event) + { + Integer key = new Integer(event.window_id); + Window awtWindow = (Window) windows.get(key); + + if (XToolkit.DEBUG) + System.err.println("expose request for window id: " + key); + + Rectangle r = new Rectangle(event.x(), event.y(), event.width(), + event.height()); + // We need to clear the background of the exposed rectangle. + assert awtWindow != null : "awtWindow == null for window ID: " + key; + + Graphics g = awtWindow.getGraphics(); + g.clearRect(r.x, r.y, r.width, r.height); + g.dispose(); + + XWindowPeer xwindow = (XWindowPeer) awtWindow.getPeer(); + Insets i = xwindow.insets(); + if (event.width() != awtWindow.getWidth() - i.left - i.right + || event.height() != awtWindow.getHeight() - i.top - i.bottom) + { + int w = event.width(); + int h = event.height(); + int x = xwindow.xwindow.x; + int y = xwindow.xwindow.y; + + if (XToolkit.DEBUG) + System.err.println("Setting size on AWT window: " + w + + ", " + h + ", " + awtWindow.getWidth() + + ", " + awtWindow.getHeight()); + + // new width and height + xwindow.xwindow.width = w; + xwindow.xwindow.height = h; + + // reshape the window + ComponentReshapeEvent cre = + new ComponentReshapeEvent(awtWindow, x, y, w, h); + awtWindow.dispatchEvent(cre); + } + + ComponentEvent ce = + new ComponentEvent(awtWindow, ComponentEvent.COMPONENT_RESIZED); + awtWindow.dispatchEvent(ce); + + PaintEvent pev = new PaintEvent(awtWindow, PaintEvent.UPDATE, r); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(pev); + } + + private void handleDestroyNotify(DestroyNotify destroyNotify) + { + if (XToolkit.DEBUG) + System.err.println("DestroyNotify event: " + destroyNotify); + + Integer key = new Integer(destroyNotify.event_window_id); + Window awtWindow = (Window) windows.get(key); + + AWTEvent event = new WindowEvent(awtWindow, WindowEvent.WINDOW_CLOSED); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(event); + } + + private void handleClientMessage(ClientMessage clientMessage) + { + if (XToolkit.DEBUG) + System.err.println("ClientMessage event: " + clientMessage); + + if (clientMessage.delete_window()) + { + if (XToolkit.DEBUG) + System.err.println("ClientMessage is a delete_window event"); + + Integer key = new Integer(clientMessage.window_id); + Window awtWindow = (Window) windows.get(key); + + AWTEvent event = new WindowEvent(awtWindow, WindowEvent.WINDOW_CLOSING); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(event); + } + } + + private void handleEvent(Event xEvent) + { + if (XToolkit.DEBUG) + System.err.println("fetched event: " + xEvent); + + switch (xEvent.code() & 0x7f) + { + case ButtonPress.CODE: + this.handleButtonPress((ButtonPress) xEvent); + break; + case ButtonRelease.CODE: + this.handleButtonRelease((ButtonRelease) xEvent); + break; + case MotionNotify.CODE: + this.handleMotionNotify((MotionNotify) xEvent); + break; + case Expose.CODE: + this.handleExpose((Expose) xEvent); + break; + case KeyPress.CODE: + case KeyRelease.CODE: + Integer key = new Integer(((Input) xEvent).getEventWindowID()); + Window awtWindow = (Window) windows.get(key); + handleKeyEvent(xEvent, awtWindow); + break; + case DestroyNotify.CODE: + this.handleDestroyNotify((DestroyNotify) xEvent); + break; + case ClientMessage.CODE: + this.handleClientMessage((ClientMessage) xEvent); + break; + case PropertyNotify.CODE: + key = new Integer (((PropertyNotify) xEvent).getWindowID()); + awtWindow = (Window) windows.get(key); + AWTEvent event = new WindowEvent(awtWindow, WindowEvent.WINDOW_STATE_CHANGED); + Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(event); + 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.getState(); + 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); + } + + } + + /** Translates an X button identifier to the AWT's MouseEvent modifier + * mask. As the AWT cannot handle more than 3 buttons those return + * <code>0</code>. + */ + static int buttonToModifier(int button) + { + switch (button) + { + case gnu.x11.Input.BUTTON1: + return MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON1_MASK; + case gnu.x11.Input.BUTTON2: + return MouseEvent.BUTTON2_DOWN_MASK | MouseEvent.BUTTON2_MASK; + case gnu.x11.Input.BUTTON3: + return MouseEvent.BUTTON3_DOWN_MASK | MouseEvent.BUTTON3_MASK; + } + + return 0; + } + + /** + * Finds the heavyweight mouse event target. + * + * @param src the original source of the event + * + * @param pt the event coordinates + * + * @return the real mouse event target + */ + private Component findMouseEventTarget(Component src, int x, int y) + { + Component found = null; + if (src instanceof Container) + { + Container cont = (Container) src; + int numChildren = cont.getComponentCount(); + for (int i = 0; i < numChildren && found == null; i++) + { + Component child = cont.getComponent(i); + if (child != null && child.isVisible() + && child.contains(x - child.getX(), y - child.getY())) + { + if (child instanceof Container) + { + Component deeper = findMouseEventTarget(child, + x - child.getX(), + y - child.getY()); + if (deeper != null) + found = deeper; + } + else if (! child.isLightweight()) + found = child; + } + } + } + + // Consider the source itself. + if (found == null && src.contains(x, y) && ! src.isLightweight()) + found = src; + + return found; + } +} |