/*

 * Copyright (c) 2005, 2015, 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

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package sun.awt.X11;

import java.awt.*;

import java.awt.event.*;

import java.awt.peer.TrayIconPeer;

import sun.awt.*;

import java.awt.image.*;

import java.security.AccessController;

import java.security.PrivilegedAction;

import java.lang.reflect.InvocationTargetException;

import sun.util.logging.PlatformLogger;

public class XTrayIconPeer implements TrayIconPeer,

       InfoWindow.Balloon.LiveArguments,

       InfoWindow.Tooltip.LiveArguments

{

    private static final PlatformLogger ctrLog = PlatformLogger.getLogger("sun.awt.X11.XTrayIconPeer.centering");

    TrayIcon target;

    TrayIconEventProxy eventProxy;

    XTrayIconEmbeddedFrame eframe;

    TrayIconCanvas canvas;

    InfoWindow.Balloon balloon;

    InfoWindow.Tooltip tooltip;

    PopupMenu popup;

    String tooltipString;

    boolean isTrayIconDisplayed;

    long eframeParentID;

    final XEventDispatcher parentXED, eframeXED;

    static final XEventDispatcher dummyXED = new XEventDispatcher() {

            public void dispatchEvent(XEvent ev) {}

        };

    volatile boolean isDisposed;

    boolean isParentWindowLocated;

    int old_x, old_y;

    int ex_width, ex_height;

    static final int TRAY_ICON_WIDTH = 24;

    static final int TRAY_ICON_HEIGHT = 24;

    XTrayIconPeer(TrayIcon target)

      throws AWTException

    {

        this.target = target;

        eventProxy = new TrayIconEventProxy(this);

        canvas = new TrayIconCanvas(target, TRAY_ICON_WIDTH, TRAY_ICON_HEIGHT);

        eframe = new XTrayIconEmbeddedFrame();

        eframe.setSize(TRAY_ICON_WIDTH, TRAY_ICON_HEIGHT);

        eframe.add(canvas);

        // Fix for 6317038: as EmbeddedFrame is instance of Frame, it is blocked

        // by modal dialogs, but in the case of TrayIcon it shouldn't. So we

        // set ModalExclusion property on it.

        AccessController.doPrivileged(new PrivilegedAction<Object>() {

            public Object run() {

                eframe.setModalExclusionType(Dialog.ModalExclusionType.TOOLKIT_EXCLUDE);

                return null;

            }

        });

        if (XWM.getWMID() != XWM.METACITY_WM) {

            parentXED = dummyXED; // We don't like to leave it 'null'.

        } else {

            parentXED = new XEventDispatcher() {

                // It's executed under AWTLock.

                public void dispatchEvent(XEvent ev) {

                    if (isDisposed() || ev.get_type() != XConstants.ConfigureNotify) {

                        return;

                    }

                    XConfigureEvent ce = ev.get_xconfigure();

                    if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                        ctrLog.fine("ConfigureNotify on parent of {0}: {1}x{2}+{3}+{4} (old: {5}+{6})",

                                XTrayIconPeer.this, ce.get_width(), ce.get_height(),

                                ce.get_x(), ce.get_y(), old_x, old_y);

                    }

                    // A workaround for Gnome/Metacity (it doesn't affect the behaviour on KDE).

                    // On Metacity the EmbeddedFrame's parent window bounds are larger

                    // than TrayIcon size required (that is we need a square but a rectangle

                    // is provided by the Panel Notification Area). The parent's background color

                    // differs from the Panel's one. To hide the background we resize parent

                    // window so that it fits the EmbeddedFrame.

                    // However due to resizing the parent window it loses centering in the Panel.

                    // We center it when discovering that some of its side is of size greater

                    // than the fixed value. Centering is being done by "X" (when the parent's width

                    // is greater) and by "Y" (when the parent's height is greater).

                    // Actually we need this workaround until we could detect taskbar color.

                    if (ce.get_height() != TRAY_ICON_HEIGHT && ce.get_width() != TRAY_ICON_WIDTH) {

                        // If both the height and the width differ from the fixed size then WM

                        // must level at least one side to the fixed size. For some reason it may take

                        // a few hops (even after reparenting) and we have to skip the intermediate ones.

                        if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                            ctrLog.fine("ConfigureNotify on parent of {0}. Skipping as intermediate resizing.",

                                    XTrayIconPeer.this);

                        }

                        return;

                    } else if (ce.get_height() > TRAY_ICON_HEIGHT) {

                        if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                            ctrLog.fine("ConfigureNotify on parent of {0}. Centering by \"Y\".",

                                    XTrayIconPeer.this);

                        }

                        XlibWrapper.XMoveResizeWindow(XToolkit.getDisplay(), eframeParentID,

                                                      ce.get_x(),

                                                      ce.get_y()+ce.get_height()/2-TRAY_ICON_HEIGHT/2,

                                                      TRAY_ICON_WIDTH,

                                                      TRAY_ICON_HEIGHT);

                        ex_height = ce.get_height();

                        ex_width = 0;

                    } else if (ce.get_width() > TRAY_ICON_WIDTH) {

                        if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                            ctrLog.fine("ConfigureNotify on parent of {0}. Centering by \"X\".",

                                    XTrayIconPeer.this);

                        }

                        XlibWrapper.XMoveResizeWindow(XToolkit.getDisplay(), eframeParentID,

                                                      ce.get_x()+ce.get_width()/2 - TRAY_ICON_WIDTH/2,

                                                      ce.get_y(),

                                                      TRAY_ICON_WIDTH,

                                                      TRAY_ICON_HEIGHT);

                        ex_width = ce.get_width();

                        ex_height = 0;

                    } else if (isParentWindowLocated && ce.get_x() != old_x && ce.get_y() != old_y) {

                        // If moving by both "X" and "Y".

                        // When some tray icon gets removed from the tray, a Java icon may be repositioned.

                        // In this case the parent window also lose centering. We have to restore it.

                        if (ex_height != 0) {

                            if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                                ctrLog.fine("ConfigureNotify on parent of {0}. Move detected. Centering by \"Y\".",

                                        XTrayIconPeer.this);

                            }

                            XlibWrapper.XMoveWindow(XToolkit.getDisplay(), eframeParentID,

                                                    ce.get_x(),

                                                    ce.get_y() + ex_height/2 - TRAY_ICON_HEIGHT/2);

                        } else if (ex_width != 0) {

                            if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                                ctrLog.fine("ConfigureNotify on parent of {0}. Move detected. Centering by \"X\".",

                                        XTrayIconPeer.this);

                            }

                            XlibWrapper.XMoveWindow(XToolkit.getDisplay(), eframeParentID,

                                                    ce.get_x() + ex_width/2 - TRAY_ICON_WIDTH/2,

                                                    ce.get_y());

                        } else {

                            if (ctrLog.isLoggable(PlatformLogger.Level.FINE)) {

                                ctrLog.fine("ConfigureNotify on parent of {0}. Move detected. Skipping.",

                                        XTrayIconPeer.this);

                            }

                        }

                    }

                    old_x = ce.get_x();

                    old_y = ce.get_y();

                    isParentWindowLocated = true;

                }

            };

        }

        eframeXED = new XEventDispatcher() {

                // It's executed under AWTLock.

                XTrayIconPeer xtiPeer = XTrayIconPeer.this;

                public void dispatchEvent(XEvent ev) {

                    if (isDisposed() || ev.get_type() != XConstants.ReparentNotify) {

                        return;

                    }

                    XReparentEvent re = ev.get_xreparent();

                    eframeParentID = re.get_parent();

                    if (eframeParentID == XToolkit.getDefaultRootWindow()) {

                        if (isTrayIconDisplayed) { // most likely Notification Area was removed

                            SunToolkit.executeOnEventHandlerThread(xtiPeer.target, new Runnable() {

                                    public void run() {

                                        SystemTray.getSystemTray().remove(xtiPeer.target);

                                    }

                                });

                        }

                        return;

                    }

                    if (!isTrayIconDisplayed) {

                        addXED(eframeParentID, parentXED, XConstants.StructureNotifyMask);

                        isTrayIconDisplayed = true;

                        XToolkit.awtLockNotifyAll();

                    }

                }

            };

        addXED(getWindow(), eframeXED, XConstants.StructureNotifyMask);

        XSystemTrayPeer.getPeerInstance().addTrayIcon(this); // throws AWTException

        // Wait till the EmbeddedFrame is reparented

        long start = System.currentTimeMillis();

        final long PERIOD = XToolkit.getTrayIconDisplayTimeout();

        XToolkit.awtLock();

        try {

            while (!isTrayIconDisplayed) {

                try {

                    XToolkit.awtLockWait(PERIOD);

                } catch (InterruptedException e) {

                    break;

                }

                if (System.currentTimeMillis() - start > PERIOD) {

                    break;

                }

            }

        } finally {

            XToolkit.awtUnlock();

        }

        // This is unlikely to happen.

        if (!isTrayIconDisplayed || eframeParentID == 0 ||

            eframeParentID == XToolkit.getDefaultRootWindow())

        {

            throw new AWTException("TrayIcon couldn't be displayed.");

        }

        eframe.setVisible(true);

        updateImage();

        balloon = new InfoWindow.Balloon(eframe, target, this);

        tooltip = new InfoWindow.Tooltip(eframe, target, this);

        addListeners();

    }

    public void dispose() {

        if (SunToolkit.isDispatchThreadForAppContext(target)) {

            disposeOnEDT();

        } else {

            try {

                SunToolkit.executeOnEDTAndWait(target, new Runnable() {

                        public void run() {

                            disposeOnEDT();

                        }

                    });

            } catch (InterruptedException ie) {

            } catch (InvocationTargetException ite) {}

        }

    }

    private void disposeOnEDT() {

        // All actions that is to be synchronized with disposal

        // should be executed either under AWTLock, or on EDT.

        // isDisposed value must be checked.

        XToolkit.awtLock();

        isDisposed = true;

        XToolkit.awtUnlock();

        removeXED(getWindow(), eframeXED);

        removeXED(eframeParentID, parentXED);

        removeListeners();

        eframe.realDispose();

        balloon.dispose();

        tooltip.dispose();

        isTrayIconDisplayed = false;

        canvas.dispose();

        canvas = null;

        popup = null;

        balloon = null;

        tooltip = null;

        XToolkit.targetDisposedPeer(target, this);

        target = null;

        eframe = null;

    }

    public static void suppressWarningString(Window w) {

        AWTAccessor.getWindowAccessor().setTrayIconWindow(w, true);

    }

    public void setToolTip(String tooltip) {

        tooltipString = tooltip;

    }

    public String getTooltipString() {

        return tooltipString;

    }

    public void updateImage() {

        Runnable r = new Runnable() {

                public void run() {

                    canvas.updateImage(target.getImage());

                }

            };

        if (!SunToolkit.isDispatchThreadForAppContext(target)) {

            SunToolkit.executeOnEventHandlerThread(target, r);

        } else {

            r.run();

        }

    }

    public void displayMessage(String caption, String text, String messageType) {

        Point loc = getLocationOnScreen();

        Rectangle screen = eframe.getGraphicsConfiguration().getBounds();

        // Check if the tray icon is in the bounds of a screen.

        if (!(loc.x < screen.x || loc.x >= screen.x + screen.width ||

              loc.y < screen.y || loc.y >= screen.y + screen.height))

        {

            balloon.display(caption, text, messageType);

        }

    }

    // It's synchronized with disposal by EDT.

    public void showPopupMenu(int x, int y) {

        if (isDisposed())

            return;

        assert SunToolkit.isDispatchThreadForAppContext(target);

        PopupMenu newPopup = target.getPopupMenu();

        if (popup != newPopup) {

            if (popup != null) {

                eframe.remove(popup);

            }

            if (newPopup != null) {

                eframe.add(newPopup);

            }

            popup = newPopup;

        }

        if (popup != null) {

            final XBaseWindow peer = AWTAccessor.getComponentAccessor()

                                                .getPeer(eframe);

            Point loc = peer.toLocal(new Point(x, y));

            popup.show(eframe, loc.x, loc.y);

        }

    }

    // ******************************************************************

    // ******************************************************************

    private void addXED(long window, XEventDispatcher xed, long mask) {

        if (window == 0) {

            return;

        }

        XToolkit.awtLock();

        try {

            XlibWrapper.XSelectInput(XToolkit.getDisplay(), window, mask);

        } finally {

            XToolkit.awtUnlock();

        }

        XToolkit.addEventDispatcher(window, xed);

    }

    private void removeXED(long window, XEventDispatcher xed) {

        if (window == 0) {

            return;

        }

        XToolkit.awtLock();

        try {

            XToolkit.removeEventDispatcher(window, xed);

        } finally {

            XToolkit.awtUnlock();

        }

    }

    // Private method for testing purposes.

    private Point getLocationOnScreen() {

        return eframe.getLocationOnScreen();

    }

    public Rectangle getBounds() {

        Point loc = getLocationOnScreen();

        return new Rectangle(loc.x, loc.y, loc.x + TRAY_ICON_WIDTH, loc.y + TRAY_ICON_HEIGHT);

    }

    void addListeners() {

        canvas.addMouseListener(eventProxy);

        canvas.addMouseMotionListener(eventProxy);

        eframe.addMouseListener(eventProxy);

    }

    void removeListeners() {

        canvas.removeMouseListener(eventProxy);

        canvas.removeMouseMotionListener(eventProxy);

        eframe.removeMouseListener(eventProxy);

    }

    long getWindow() {

        return AWTAccessor.getComponentAccessor()

                          .<XEmbeddedFramePeer>getPeer(eframe).getWindow();

    }

    public boolean isDisposed() {

        return isDisposed;

    }

    public String getActionCommand() {

        return target.getActionCommand();

    }

    static class TrayIconEventProxy implements MouseListener, MouseMotionListener {

        XTrayIconPeer xtiPeer;

        TrayIconEventProxy(XTrayIconPeer xtiPeer) {

            this.xtiPeer = xtiPeer;

        }

        public void handleEvent(MouseEvent e) {

            //prevent DRAG events from being posted with TrayIcon source(CR 6565779)

            if (e.getID() == MouseEvent.MOUSE_DRAGGED) {

                return;

            }

            // Event handling is synchronized with disposal by EDT.

            if (xtiPeer.isDisposed()) {

                return;

            }

            Point coord = XBaseWindow.toOtherWindow(xtiPeer.getWindow(),

                                                    XToolkit.getDefaultRootWindow(),

                                                    e.getX(), e.getY());

            if (e.isPopupTrigger()) {

                xtiPeer.showPopupMenu(coord.x, coord.y);

            }

            e.translatePoint(coord.x - e.getX(), coord.y - e.getY());

            // This is a hack in order to set non-Component source to MouseEvent

            // instance.

            // In some cases this could lead to unpredictable result (e.g. when

            // other class tries to cast source field to Component).

            // We already filter DRAG events out (CR 6565779).

            e.setSource(xtiPeer.target);

            XToolkit.postEvent(XToolkit.targetToAppContext(e.getSource()), e);

        }

        @SuppressWarnings("deprecation")

        public void mouseClicked(MouseEvent e) {

            if ((e.getClickCount() == 1 || xtiPeer.balloon.isVisible()) &&

                e.getButton() == MouseEvent.BUTTON1)

            {

                ActionEvent aev = new ActionEvent(xtiPeer.target, ActionEvent.ACTION_PERFORMED,

                                                  xtiPeer.target.getActionCommand(), e.getWhen(),

                                                  e.getModifiers());

                XToolkit.postEvent(XToolkit.targetToAppContext(aev.getSource()), aev);

            }

            if (xtiPeer.balloon.isVisible()) {

                xtiPeer.balloon.hide();

            }

            handleEvent(e);

        }

        public void mouseEntered(MouseEvent e) {

            xtiPeer.tooltip.enter();

            handleEvent(e);

        }

        public void mouseExited(MouseEvent e) {

            xtiPeer.tooltip.exit();

            handleEvent(e);

        }

        public void mousePressed(MouseEvent e) {

            handleEvent(e);

        }

        public void mouseReleased(MouseEvent e) {

            handleEvent(e);

        }

        public void mouseDragged(MouseEvent e) {

            handleEvent(e);

        }

        public void mouseMoved(MouseEvent e) {

            handleEvent(e);

        }

    }