// Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC.
// All rights reserved.
//
//-------------------------------------------------------------------------
// This file is part of the TightVNC software.  Please visit our Web site:
//
//                       http://www.tightvnc.com/
//
// This program 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 of the License, or
// (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//-------------------------------------------------------------------------
//

package com.glavsoft.viewer.swing;

import com.glavsoft.core.SettingsChangedEvent;
import com.glavsoft.rfb.IChangeSettingsListener;
import com.glavsoft.rfb.client.KeyEventMessage;
import com.glavsoft.rfb.protocol.Protocol;
import com.glavsoft.rfb.protocol.ProtocolContext;
import com.glavsoft.rfb.protocol.ProtocolSettings;
import com.glavsoft.utils.Keymap;
import com.glavsoft.viewer.*;
import com.glavsoft.viewer.swing.gui.OptionsDialog;

import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;

import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.Field;
import java.net.Socket;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;

import jp.ac.u_ryukyu.treevnc.*;

public class SwingViewerWindow implements IChangeSettingsListener {
    public static final int FS_SCROLLING_ACTIVE_BORDER = 20;
    private JToggleButton zoomFitButton;
    private JToggleButton zoomFullScreenButton;
    private JButton zoomInButton;
    private JButton zoomOutButton;
    private JButton zoomAsIsButton;
    private JPanel outerPanel;
    private JScrollPane scroller;
    private JFrame frame;
    private boolean forceResizable = true;
    private ButtonsBar buttonsBar;
    private Surface surface;
    private boolean isSeparateFrame;
    private final boolean isApplet;
    private ViewerInterface viewer;
    private String connectionString;
    private ConnectionPresenter presenter;
    private Rectangle oldContainerBounds;
    private volatile boolean isFullScreen;
    private Border oldScrollerBorder;
    private JLayeredPane lpane;
    private EmptyButtonsBarMouseAdapter buttonsBarMouseAdapter;
    private String remoteDesktopName;
    private ProtocolSettings rfbSettings;

    private UiSettings uiSettings;
    private Protocol workingProtocol;
    public int width;
    public int height;

    private boolean isZoomToFitSelected;
    private List<JComponent> kbdButtons;

    public SwingViewerWindow(Protocol workingProtocol, ProtocolSettings rfbSettings, UiSettings uiSettings, Surface surface,
            boolean isSeparateFrame, boolean isApplet, ViewerInterface viewer, String connectionString,
            ConnectionPresenter presenter, int w, int h) {
        this.workingProtocol = workingProtocol;
        this.rfbSettings = rfbSettings;
        this.uiSettings = uiSettings;
        this.surface = surface;
        this.isSeparateFrame = isSeparateFrame;
        this.isApplet = isApplet;
        this.viewer = viewer;
        this.connectionString = connectionString;
        this.presenter = presenter;
        this.width = w;
        this.height = h;

        if(viewer instanceof Viewer)
            createContainer(surface, isApplet, (Viewer)viewer);


        if (uiSettings.showControls) {
            if(viewer instanceof Viewer)
                createButtonsPanel(workingProtocol, isSeparateFrame? frame: (Viewer)viewer);
            if (isSeparateFrame) registerResizeListener(frame);
            updateZoomButtonsState();
        }
        if (uiSettings.isFullScreen()) {
            switchOnFullscreenMode();
        }
        setSurfaceToHandleKbdFocus();
        if (isSeparateFrame) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        // nop
                    }
                    SwingUtilities.invokeLater(new Runnable() {
                        @Override
                        public void run() {
                            frame.toFront();
                        }
                    });
                }
            }).start();
        }
    }

    private void createContainer(final Surface surface, boolean isApplet, JApplet appletWindow) {
        outerPanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 0, 0)) {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;
            @Override
            public Dimension getSize() {
                return surface.getPreferredSize();
            }
            @Override
            public Dimension getPreferredSize() {
                return surface.getPreferredSize();
            }
        };
        Dimension outerPanelSize = outerPanel.getSize();
        double width = outerPanelSize.getWidth();
        double height = outerPanelSize.getHeight();
        outerPanel.setBackground(Color.DARK_GRAY);
        lpane = new JLayeredPane() {
            /**
             * 
             */
            private static final long serialVersionUID = 1L;
            @Override
            public Dimension getSize() {
                return surface.getPreferredSize();
            }
            @Override
            public Dimension getPreferredSize() {
                return surface.getPreferredSize();
            }
        };
        lpane.setPreferredSize(surface.getPreferredSize());
        lpane.add(surface, JLayeredPane.DEFAULT_LAYER, 0);
        outerPanel.add(lpane);

        scroller = new JScrollPane(outerPanel);
        if (isSeparateFrame) {
            frame = new JFrame();
            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            if ( ! isApplet) {
                frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            }
            frame.setModalExclusionType(Dialog.ModalExclusionType.APPLICATION_EXCLUDE);
            Utils.setApplicationIconsForWindow(frame);
            frame.setLayout(new BorderLayout(0, 0));
            frame.add(scroller, BorderLayout.CENTER);

            //			frame.pack();
            outerPanel.setSize(surface.getPreferredSize());
            internalPack(null);
            if(viewer.getRfb().isTreeManager() || viewer.getCuiVersion()) {
                frame.setVisible(false);
                viewer.setCuiVersion(false);
            } else 
                frame.setVisible(true);
            //frame.setVisible(false);
            frame.validate();
        } else {
            appletWindow.setLayout(new BorderLayout(0, 0));
            appletWindow.add(scroller, BorderLayout.CENTER);
            appletWindow.validate();
        }
    }

    public void pack() {
        final Dimension outerPanelOldSize = outerPanel.getSize();
        outerPanel.setSize(surface.getPreferredSize());
        if (isSeparateFrame && ! isZoomToFitSelected()) {
            internalPack(outerPanelOldSize);
        }
        if (buttonsBar != null) {
            updateZoomButtonsState();
        }
        updateWindowTitle();
    }

    public boolean isZoomToFitSelected() {
        return isZoomToFitSelected;
    }

    public void setZoomToFitSelected(boolean zoomToFitSelected) {
        isZoomToFitSelected = zoomToFitSelected;
    }

    public void setRemoteDesktopName(String name) {
        remoteDesktopName = name;
        TreeRFBProto rfb = viewer.getRfb();
        if (rfb!=null) {
            int port = rfb.getAcceptPort();
            remoteDesktopName += ":" + port; 
        }
        updateWindowTitle();
    }

    private void updateWindowTitle() {
        if (isSeparateFrame) {
            frame.setTitle(remoteDesktopName + " [zoom: " + uiSettings.getScalePercentFormatted() + "%]");
        }
    }

    private void internalPack(Dimension outerPanelOldSize) {
        final Rectangle workareaRectangle = getWorkareaRectangle();
        if (workareaRectangle.equals(frame.getBounds())) {
            forceResizable = true;
        }
        final boolean isHScrollBar = scroller.getHorizontalScrollBar().isShowing() && ! forceResizable;
        final boolean isVScrollBar = scroller.getVerticalScrollBar().isShowing() && ! forceResizable;

        boolean isWidthChangeable = true;
        boolean isHeightChangeable = true;
        if (outerPanelOldSize != null && surface.oldSize != null) {
            isWidthChangeable = forceResizable ||
                    (outerPanelOldSize.width == surface.oldSize.width && ! isHScrollBar);
            isHeightChangeable = forceResizable ||
                    (outerPanelOldSize.height == surface.oldSize.height && ! isVScrollBar);
        }
        forceResizable = false;
        frame.validate();

        final Insets containerInsets = frame.getInsets();
        Dimension preferredSize = frame.getPreferredSize();
        Rectangle preferredRectangle = new Rectangle(frame.getLocation(), preferredSize);

        if (null == outerPanelOldSize && workareaRectangle.contains(preferredRectangle)) {
            frame.pack();
        } else {
            Dimension minDimension = new Dimension(
                    containerInsets.left + containerInsets.right, containerInsets.top + containerInsets.bottom);
            if (buttonsBar != null && buttonsBar.isVisible) {
                minDimension.width += buttonsBar.getWidth();
                minDimension.height += buttonsBar.getHeight();
            }
            Dimension dim = new Dimension(preferredSize);
            Point location = frame.getLocation();
            if ( ! isWidthChangeable) {
                dim.width = frame.getWidth();
            } else {
                // このあたり、scalepercentを計算するのに使えそう
                if (isVScrollBar) dim.width += scroller.getVerticalScrollBar().getWidth();
                if (dim.width < minDimension.width) dim.width = minDimension.width;

                int dx = location.x - workareaRectangle.x;
                if (dx < 0) {
                    dx = 0;
                    location.x = workareaRectangle.x;
                }
                int w = workareaRectangle.width - dx;
                if (w < dim.width) {
                    int dw = dim.width - w;
                    if (dw < dx) {
                        location.x -= dw;
                    } else {
                        dim.width = workareaRectangle.width;
                        location.x = workareaRectangle.x;
                    }
                }
            }
            if ( ! isHeightChangeable) {
                dim.height = frame.getHeight();
            } else {

                if (isHScrollBar) dim.height += scroller.getHorizontalScrollBar().getHeight();
                if (dim.height < minDimension.height) dim.height = minDimension.height;

                int dy = location.y - workareaRectangle.y;
                if (dy < 0) {
                    dy = 0;
                    location.y = workareaRectangle.y;
                }
                int h = workareaRectangle.height - dy;
                if (h < dim.height) {
                    int dh = dim.height - h;
                    if (dh < dy) {
                        location.y -= dh;
                    } else {
                        dim.height = workareaRectangle.height;
                        location.y = workareaRectangle.y;
                    }
                }
            }
            // canet full size
            /*
            dim.width = workareaRectangle.width;
            dim.height = workareaRectangle.height;
             */
            if ( ! location.equals(frame.getLocation())) {
                frame.setLocation(location);
            }
            if ( ! isFullScreen ) {
                frame.setSize(dim);
            }
        }
        scroller.revalidate();
    }

    private Rectangle getWorkareaRectangle() {
        final GraphicsConfiguration graphicsConfiguration = frame.getGraphicsConfiguration();
        final Rectangle screenBounds = graphicsConfiguration.getBounds();
        final Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets(graphicsConfiguration);

        screenBounds.x += screenInsets.left;
        screenBounds.y += screenInsets.top;
        if (width != 0) {
            screenBounds.width = width;
            screenBounds.height = height;
        } else {
            screenBounds.width -= screenInsets.left + screenInsets.right;
            screenBounds.height -= screenInsets.top + screenInsets.bottom;
        }

        return screenBounds;
    }

    void addZoomButtons() {
        buttonsBar.createStrut();
        zoomOutButton = buttonsBar.createButton("zoom-out", "Zoom Out", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                zoomFitButton.setSelected(false);
                uiSettings.zoomOut();
            }
        });
        zoomInButton = buttonsBar.createButton("zoom-in", "Zoom In", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                zoomFitButton.setSelected(false);
                uiSettings.zoomIn();
            }
        });
        zoomAsIsButton = buttonsBar.createButton("zoom-100", "Zoom 100%", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                zoomFitButton.setSelected(false);
                forceResizable = false;
                uiSettings.zoomAsIs();
            }
        });

        zoomFitButton = buttonsBar.createToggleButton("zoom-fit", "Zoom to Fit Window",
                new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                if (e.getStateChange() == ItemEvent.SELECTED) {
                    setZoomToFitSelected(true);
                    forceResizable = true;
                    zoomToFit();
                    updateZoomButtonsState();
                } else {
                    setZoomToFitSelected(false);
                }
                setSurfaceToHandleKbdFocus();
            }
        });

        zoomFullScreenButton = buttonsBar.createToggleButton("zoom-fullscreen", "Full Screen",
                new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                updateZoomButtonsState();
                if (e.getStateChange() == ItemEvent.SELECTED) {
                    uiSettings.setFullScreen(switchOnFullscreenMode());
                } else {
                    switchOffFullscreenMode();
                    uiSettings.setFullScreen(false);
                }
                setSurfaceToHandleKbdFocus();
            }
        });
        if ( ! isSeparateFrame) {
            zoomFullScreenButton.setEnabled(false);
            zoomFitButton.setEnabled(false);
        }
    }

    protected void setSurfaceToHandleKbdFocus() {
        if (surface != null && ! surface.requestFocusInWindow()) {
            surface.requestFocus();
        }
    }

    boolean switchOnFullscreenMode() {
        zoomFullScreenButton.setSelected(true);
        oldContainerBounds = frame.getBounds();
        setButtonsBarVisible(false);
        forceResizable = true;
        frame.dispose();
        frame.setUndecorated(true);
        frame.setResizable(false);
        frame.setVisible(true);
        try {
            frame.getGraphicsConfiguration().getDevice().setFullScreenWindow(frame);
            isFullScreen = true;
            scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
            scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
            oldScrollerBorder = scroller.getBorder();
            scroller.setBorder(new EmptyBorder(0, 0, 0, 0));
            new FullscreenBorderDetectionThread(frame).start();
        } catch (Exception ex) {
            Logger.getLogger(this.getClass().getName()).info("Cannot switch into FullScreen mode: " + ex.getMessage());
            return false;
        }
        return true;
    }

    private void switchOffFullscreenMode() {
        if (isFullScreen) {
            zoomFullScreenButton.setSelected(false);
            isFullScreen = false;
            setButtonsBarVisible(true);
            try {
                frame.dispose();
                frame.setUndecorated(false);
                frame.setResizable(true);
                frame.getGraphicsConfiguration().getDevice().setFullScreenWindow(null);
            } catch (Exception e) {
                // nop
            }
            scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
            scroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
            scroller.setBorder(oldScrollerBorder);
            this.frame.setBounds(oldContainerBounds);
            frame.setVisible(true);
            pack();
        }
    }

    public void zoomToFit() {
        Dimension scrollerSize = scroller.getSize();
        Insets scrollerInsets = scroller.getInsets();
        uiSettings.zoomToFit(scrollerSize.width - scrollerInsets.left - scrollerInsets.right,
                scrollerSize.height - scrollerInsets.top - scrollerInsets.bottom +
                (isFullScreen ? buttonsBar.getHeight() : 0),
                workingProtocol.getFbWidth(), workingProtocol.getFbHeight());
    }

    void registerResizeListener(Container container) {
        container.addComponentListener(new ComponentAdapter() {
            @Override
            public void componentResized(ComponentEvent e) {
                if (isZoomToFitSelected()) {
                    zoomToFit();
                    updateZoomButtonsState();
                    updateWindowTitle();
                    setSurfaceToHandleKbdFocus();
                }
            }
        });
    }

    void updateZoomButtonsState() {
        zoomOutButton.setEnabled(uiSettings.getScalePercent() > UiSettings.MIN_SCALE_PERCENT);
        zoomInButton.setEnabled(uiSettings.getScalePercent() < UiSettings.MAX_SCALE_PERCENT);
        zoomAsIsButton.setEnabled(uiSettings.getScalePercent() != 100);
    }

    public ButtonsBar createButtonsBar() {
        buttonsBar = new ButtonsBar();
        return buttonsBar;
    }

    public void setButtonsBarVisible(boolean isVisible) {
        setButtonsBarVisible(isVisible, frame);
    }

    private void setButtonsBarVisible(boolean isVisible, Container container) {
        buttonsBar.setVisible(isVisible);
        if (isVisible) {
            buttonsBar.borderOff();
            container.add(buttonsBar.bar, BorderLayout.NORTH);
            container.validate();
        } else {
            container.remove(buttonsBar.bar);
            buttonsBar.borderOn();
        }
    }

    public void setButtonsBarVisibleFS(boolean isVisible) {
        if (isVisible) {
            if ( ! buttonsBar.isVisible) {
                lpane.add(buttonsBar.bar, JLayeredPane.POPUP_LAYER, 0);
                final int bbWidth = buttonsBar.bar.getPreferredSize().width;
                buttonsBar.bar.setBounds(
                        scroller.getViewport().getViewPosition().x + (scroller.getWidth() - bbWidth)/2, 0,
                        bbWidth, buttonsBar.bar.getPreferredSize().height);

                // prevent mouse events to through down to Surface
                if (null == buttonsBarMouseAdapter) buttonsBarMouseAdapter = new EmptyButtonsBarMouseAdapter();
                buttonsBar.bar.addMouseListener(buttonsBarMouseAdapter);
            }
        } else {
            buttonsBar.bar.removeMouseListener(buttonsBarMouseAdapter);
            lpane.remove(buttonsBar.bar);
            lpane.repaint(buttonsBar.bar.getBounds());
        }
        buttonsBar.setVisible(isVisible);
    }

    public Surface getSurface() {
        return surface;
    }

    void close() {
        if (isSeparateFrame && frame != null) {
            frame.setVisible(false);
            frame.dispose();
        }
    }

    public static class ButtonsBar {
        private static final Insets BUTTONS_MARGIN = new Insets(2, 2, 2, 2);
        private JPanel bar;
        private boolean isVisible;

        public ButtonsBar() {
            bar = new JPanel(new FlowLayout(FlowLayout.LEFT, 4, 1));
        }

        public JButton createButton(String iconId, String tooltipText, ActionListener actionListener) {
            JButton button = new JButton(Utils.getButtonIcon(iconId));
            button.setToolTipText(tooltipText);
            button.setMargin(BUTTONS_MARGIN);
            bar.add(button);
            button.addActionListener(actionListener);
            return button;
        }

        public void createStrut() {
            bar.add(Box.createHorizontalStrut(10));
        }

        public JToggleButton createToggleButton(String iconId, String tooltipText, ItemListener itemListener) {
            JToggleButton button = new JToggleButton(Utils.getButtonIcon(iconId));
            button.setToolTipText(tooltipText);
            button.setMargin(BUTTONS_MARGIN);
            bar.add(button);
            button.addItemListener(itemListener);
            return button;
        }

        public void setVisible(boolean isVisible) {
            this.isVisible = isVisible;
            if (isVisible) bar.revalidate();
        }

        public int getWidth() {
            return bar.getMinimumSize().width;
        }
        public int getHeight() {
            return bar.getMinimumSize().height;
        }

        public void borderOn() {
            bar.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
        }

        public void borderOff() {
            bar.setBorder(BorderFactory.createEmptyBorder());
        }
    }

    private static class EmptyButtonsBarMouseAdapter extends MouseAdapter {
        // empty
    }

    private class FullscreenBorderDetectionThread extends Thread {
        public static final int SHOW_HIDE_BUTTONS_BAR_DELAY_IN_MILLS = 700;
        private final JFrame frame;
        private ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
        private ScheduledFuture<?> futureForShow;
        private ScheduledFuture<?> futureForHide;
        private Point mousePoint, oldMousePoint;
        private Point viewPosition;

        public FullscreenBorderDetectionThread(JFrame frame) {
            super("FS border detector");
            this.frame = frame;
        }

        public void run() {
            setPriority(Thread.MIN_PRIORITY);
            while(isFullScreen) {
                mousePoint = MouseInfo.getPointerInfo().getLocation();
                if (null == oldMousePoint) oldMousePoint = mousePoint;
                SwingUtilities.convertPointFromScreen(mousePoint, frame);
                viewPosition = scroller.getViewport().getViewPosition();
                processButtonsBarVisibility();

                boolean needScrolling = processVScroll() || processHScroll();
                oldMousePoint = mousePoint;
                if (needScrolling) {
                    cancelShowExecutor();
                    setButtonsBarVisibleFS(false);
                    makeScrolling(viewPosition);
                }
                try {
                    Thread.sleep(100);
                } catch (Exception e) {
                    // nop
                }
            }
        }

        private boolean processHScroll() {
            if (mousePoint.x < FS_SCROLLING_ACTIVE_BORDER) {
                if (viewPosition.x > 0) {
                    int delta = FS_SCROLLING_ACTIVE_BORDER - mousePoint.x;
                    if (mousePoint.y != oldMousePoint.y) delta *= 2; // speedify scrolling on mouse moving
                    viewPosition.x -= delta;
                    if (viewPosition.x < 0) viewPosition.x = 0;
                    return true;
                }
            } else if (mousePoint.x > (frame.getWidth() - FS_SCROLLING_ACTIVE_BORDER)) {
                final Rectangle viewRect = scroller.getViewport().getViewRect();
                final int right = viewRect.width + viewRect.x;
                if (right < outerPanel.getSize().width) {
                    int delta = FS_SCROLLING_ACTIVE_BORDER - (frame.getWidth() - mousePoint.x);
                    if (mousePoint.y != oldMousePoint.y) delta *= 2; // speedify scrolling on mouse moving
                    viewPosition.x += delta;
                    if (viewPosition.x + viewRect.width > outerPanel.getSize().width) viewPosition.x =
                            outerPanel.getSize().width - viewRect.width;
                    return true;
                }
            }
            return false;
        }

        private boolean processVScroll() {
            if (mousePoint.y < FS_SCROLLING_ACTIVE_BORDER) {
                if (viewPosition.y > 0) {
                    int delta = FS_SCROLLING_ACTIVE_BORDER - mousePoint.y;
                    if (mousePoint.x != oldMousePoint.x) delta *= 2; // speedify scrolling on mouse moving
                    viewPosition.y -= delta;
                    if (viewPosition.y < 0) viewPosition.y = 0;
                    return true;
                }
            } else if (mousePoint.y > (frame.getHeight() - FS_SCROLLING_ACTIVE_BORDER)) {
                final Rectangle viewRect = scroller.getViewport().getViewRect();
                final int bottom = viewRect.height + viewRect.y;
                if (bottom < outerPanel.getSize().height) {
                    int delta = FS_SCROLLING_ACTIVE_BORDER - (frame.getHeight() - mousePoint.y);
                    if (mousePoint.x != oldMousePoint.x) delta *= 2; // speedify scrolling on mouse moving
                    viewPosition.y += delta;
                    if (viewPosition.y + viewRect.height > outerPanel.getSize().height) viewPosition.y =
                            outerPanel.getSize().height - viewRect.height;
                    return true;
                }
            }
            return false;
        }

        private void processButtonsBarVisibility() {
            if (mousePoint.y < 1) {
                cancelHideExecutor();
                // show buttons bar after delay
                if (! buttonsBar.isVisible && (null == futureForShow || futureForShow.isDone())) {
                    futureForShow = scheduler.schedule(new Runnable() {
                        @Override
                        public void run() {
                            showButtonsBar();
                        }
                    }, SHOW_HIDE_BUTTONS_BAR_DELAY_IN_MILLS, TimeUnit.MILLISECONDS);
                }
            } else {
                cancelShowExecutor();
            }
            if (buttonsBar.isVisible && mousePoint.y <= buttonsBar.getHeight()) {
                cancelHideExecutor();
            }
            if (buttonsBar.isVisible && mousePoint.y > buttonsBar.getHeight()) {
                // hide buttons bar after delay
                if (null == futureForHide || futureForHide.isDone()) {
                    futureForHide = scheduler.schedule(new Runnable() {
                        @Override
                        public void run() {
                            SwingUtilities.invokeLater(new Runnable() {
                                @Override
                                public void run() {
                                    setButtonsBarVisibleFS(false);
                                    SwingViewerWindow.this.frame.validate();
                                }
                            });
                        }
                    }, SHOW_HIDE_BUTTONS_BAR_DELAY_IN_MILLS, TimeUnit.MILLISECONDS);
                }
            }
        }

        private void cancelHideExecutor() {
            cancelExecutor(futureForHide);
        }
        private void cancelShowExecutor() {
            cancelExecutor(futureForShow);
        }

        private void cancelExecutor(ScheduledFuture<?> future) {
            if (future != null && ! future.isDone()) {
                future.cancel(true);
            }
        }

        private void makeScrolling(final Point viewPosition) {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    scroller.getViewport().setViewPosition(viewPosition);
                    final Point mousePosition = surface.getMousePosition();
                    if (mousePosition != null) {
                        final MouseEvent mouseEvent = new MouseEvent(frame, 0, 0, 0,
                                mousePosition.x, mousePosition.y, 0, false);
                        for (MouseMotionListener mml : surface.getMouseMotionListeners()) {
                            mml.mouseMoved(mouseEvent);
                        }
                    }
                }
            });
        }

        private void showButtonsBar() {
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    setButtonsBarVisibleFS(true);
                }
            });
        }
    }

    protected void createButtonsPanel(final ProtocolContext context, Container container) {
        final SwingViewerWindow.ButtonsBar buttonsBar = createButtonsBar();

        buttonsBar.createButton("options", "Set Options", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                showOptionsDialog();
                setSurfaceToHandleKbdFocus();
            }
        });

        buttonsBar.createButton("info", "Show connection info", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                showConnectionInfoMessage();
                setSurfaceToHandleKbdFocus();
            }
        });

        buttonsBar.createStrut();

        buttonsBar.createButton("refresh", "Refresh screen", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                context.sendRefreshMessage();
                setSurfaceToHandleKbdFocus();
            }
        });

        addZoomButtons();

        kbdButtons = new LinkedList<JComponent>();

        buttonsBar.createStrut();

        JButton ctrlAltDelButton = buttonsBar.createButton("ctrl-alt-del", "Send 'Ctrl-Alt-Del'", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                sendCtrlAltDel(context);
                setSurfaceToHandleKbdFocus();
            }
        });
        kbdButtons.add(ctrlAltDelButton);

        JButton winButton = buttonsBar.createButton("win", "Send 'Win' key as 'Ctrl-Esc'", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                sendWinKey(context);
                setSurfaceToHandleKbdFocus();
            }
        });
        kbdButtons.add(winButton);

        JToggleButton ctrlButton = buttonsBar.createToggleButton("ctrl", "Ctrl Lock",
                new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                if (e.getStateChange() == ItemEvent.SELECTED) {
                    context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, true));
                } else {
                    context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, false));
                }
                setSurfaceToHandleKbdFocus();
            }
        });
        kbdButtons.add(ctrlButton);

        JToggleButton altButton = buttonsBar.createToggleButton("alt", "Alt Lock",
                new ItemListener() {
            @Override
            public void itemStateChanged(ItemEvent e) {
                if (e.getStateChange() == ItemEvent.SELECTED) {
                    context.sendMessage(new KeyEventMessage(Keymap.K_ALT_LEFT, true));
                } else {
                    context.sendMessage(new KeyEventMessage(Keymap.K_ALT_LEFT, false));
                }
                setSurfaceToHandleKbdFocus();
            }
        });
        kbdButtons.add(altButton);

        final SwingViewerWindow viewerWindow = this;
        JButton screenButton = buttonsBar.createButton("share", "Share my screen", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                ArrayList<Rectangle> rectangles = viewer.getScreenRectangles();
                if (rectangles.size() == 1) { // single display
                    screenChangeRequest(context, 0);
                } else if (rectangles.size() == 2){ // dual display
                    ScreenChangeSelectionPanel selectionPanel = new ScreenChangeSelectionPanel(viewerWindow, context);
                    for (int i = 0; i < rectangles.size(); i++) {
                        Rectangle rectangle = rectangles.get(i);
                        int screenWidth = rectangle.width * retinaScale(i);
                        int screenHeight = rectangle.height * retinaScale(i);
                        selectionPanel.checkBox(screenWidth+" X "+screenHeight);
                    }
                    selectionPanel.setButton();
                    selectionPanel.visible();
                }
            }
        });

        final JButton adjustHdSizeButton = buttonsBar.createButton("adjust-hd", "Adjust Hd Size", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //                adjustHdSizeButton.setSelected(false);
                int singleWidth = viewer.getRfb().getSingleWidth();
                uiSettings.adjustHdSize(singleWidth);
            }
        });

        final JButton fitScreenButton = buttonsBar.createButton("fit-screen", "Fit Screen", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                fitScreen();
                /*
                if (!viewer.getRfb().isTreeManager()) {
                    context.sendMessage(new RequestSingleDisplaySize());
                }
                */
            }
        });

        ModifierButtonEventListener modifierButtonListener = new ModifierButtonEventListener();
        modifierButtonListener.addButton(KeyEvent.VK_CONTROL, ctrlButton);
        modifierButtonListener.addButton(KeyEvent.VK_ALT, altButton);
        surface.addModifierListener(modifierButtonListener);

        //		JButton fileTransferButton = new JButton(Utils.getButtonIcon("file-transfer"));
        //		fileTransferButton.setMargin(buttonsMargin);
        //		buttonBar.add(fileTransferButton);

        buttonsBar.createStrut();

        buttonsBar.createButton("close", isApplet ? "Disconnect" : "Close", new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (frame != null) {
                    frame.setVisible(false);
                    frame.dispose();
                }
                presenter.setNeedReconnection(false);
                presenter.cancelConnection();
                viewer.closeApp();
            }
        }).setAlignmentX(JComponent.RIGHT_ALIGNMENT);

        setButtonsBarVisible(true, container);
    }

    public void screenChangeRequest(ProtocolContext context, int shareScreenNumber) {
        ArrayList<Rectangle> rectangles =  viewer.getScreenRectangles();
        int singleWidth = (int) (rectangles.get(shareScreenNumber).getWidth());
        int singleHeight = (int) (rectangles.get(shareScreenNumber).getHeight());
        viewer.getRfb().setSingleDisplaySize(singleWidth, singleHeight);
        int x = (int) (rectangles.get(shareScreenNumber).getX()); // convert double to int
        int y = (int) (rectangles.get(shareScreenNumber).getY());

        // Fix invalid x, y position.
        if (x == 0 && y == 0) {
            for (int i = 0; i < rectangles.size(); i++) {
                Rectangle rectangle = rectangles.get(i);
                int scale = retinaScale(i);
                if (rectangle.getX() < 0) {
                    x = Math.abs((int) rectangle.getX()) * scale;
                }
                if (rectangle.getY() < 0) {
                    y = Math.abs((int) rectangle.getY()) * scale;
                }
            }
        } else {
            for (int i = 0; i < rectangles.size(); i++) {
                if(i != shareScreenNumber) {
                    x = x * retinaScale(i);
                    y = y * retinaScale(i);
                }
            }
        }
        x = x < 0 ? 0 : x;
        y = y < 0 ? 0 : y;

        int scale = retinaScale(shareScreenNumber);

        if (viewer.getRfb().isTreeManager()) {
            changeVncServer(viewer, x, y, singleWidth, singleHeight, scale, viewer.getRfb().getId());
            return;
        }

        if (viewer.getRfb().hasParent()) {
            String adr = viewer.getRfb().getMyAddress();
                if (scanPort(adr, ConnectionParams.DEFAULT_RFB_PORT)) {
                    // -1 means request to reverse direct connection socket
                    short id = viewer.getRfb().isTreeManager()? (short)-1 : viewer.getRfb().getId();
                    context.sendMessage(new ScreenChangeRequest(adr, ConnectionParams.DEFAULT_VNC_ROOT, id, x, y, singleWidth, singleHeight, scale));
                }
        }
    }

    private int retinaScale(int shareScreenNumber) {
        int scale = 1;
        GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment();
        final GraphicsDevice[] devices = env.getScreenDevices();

        try {
            Field field = devices[shareScreenNumber].getClass().getDeclaredField("scale");

            if (field != null) {
                field.setAccessible(true);
                Object retinaScale = field.get(devices[shareScreenNumber]);

                if (retinaScale instanceof Integer) {
                    scale = (Integer) retinaScale;
                    return scale;
                }
            }
        } catch (Exception ignore) {}
        //...
        return scale;
    }

    private boolean scanPort(String adr, int port) {
        try {
            Socket socket = new Socket(adr, port);
            socket.close();
            return true;
        } catch (Exception e) {
            String message =  "Please screen sharing settings";
            // show error panel
            presenter.showPortErrorDialog(message);
            presenter.clearMessage();
            return false;
        }
    }

    /**
     * change screen viewer scale to fit the server screen size
     */
    public void fitScreen() {
        ArrayList<Rectangle> rectangles = viewer.getScreenRectangles();
        int leftScreenNumber = 0;
        int thisScreenWidth = (int) rectangles.get(leftScreenNumber).getWidth();
        int thisScreenHeight = (int) rectangles.get(leftScreenNumber).getHeight();


        int thatScreenX = (int) presenter.getX();
        int thatScreenY = (int) presenter.getY();

        int singleWidth = viewer.getRfb().getSingleWidth() * viewer.getRfb().getRetinaScale();
        int singleHeight = viewer.getRfb().getSingleHeight() * viewer.getRfb().getRetinaScale();
        frame.setSize(thisScreenWidth, thisScreenHeight);
        uiSettings.fitScreen(thisScreenWidth, thisScreenHeight, singleWidth, singleHeight);
        final Rectangle visible = new Rectangle(thatScreenX,thatScreenY,thisScreenWidth,thisScreenHeight);
        SwingUtilities.invokeLater(new Runnable(){
            public void run() {
                scroller.scrollRectToVisible(visible);
            }
        });
    }

    private void sendCtrlAltDel(ProtocolContext context) {
        context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, true));
        context.sendMessage(new KeyEventMessage(Keymap.K_ALT_LEFT, true));
        context.sendMessage(new KeyEventMessage(Keymap.K_DELETE, true));
        context.sendMessage(new KeyEventMessage(Keymap.K_DELETE, false));
        context.sendMessage(new KeyEventMessage(Keymap.K_ALT_LEFT, false));
        context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, false));
    }

    private void sendWinKey(ProtocolContext context) {
        context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, true));
        context.sendMessage(new KeyEventMessage(Keymap.K_ESCAPE, true));
        context.sendMessage(new KeyEventMessage(Keymap.K_ESCAPE, false));
        context.sendMessage(new KeyEventMessage(Keymap.K_CTRL_LEFT, false));
    }

    @Override
    public void settingsChanged(SettingsChangedEvent e) {
        if (ProtocolSettings.isRfbSettingsChangedFired(e)) {
            ProtocolSettings settings = (ProtocolSettings) e.getSource();
            setEnabledKbdButtons( ! settings.isViewOnly());
        }
    }

    private void setEnabledKbdButtons(boolean enabled) {
        if (kbdButtons != null) {
            for (JComponent b : kbdButtons) {
                b.setEnabled(enabled);
            }
        }
    }

    private void showOptionsDialog() {
        OptionsDialog optionsDialog = new OptionsDialog(frame);
        optionsDialog.initControlsFromSettings(rfbSettings, uiSettings, false);
        optionsDialog.setVisible(true);
        presenter.saveHistory();
    }

    private void showConnectionInfoMessage() {
        StringBuilder message = new StringBuilder();
        message.append("TightVNC Viewer v.").append(Viewer.ver()).append("\n\n");
        message.append("Connected to: ").append(remoteDesktopName).append("\n");
        message.append("Host: ").append(connectionString).append("\n\n");

        message.append("Desktop geometry: ")
        .append(String.valueOf(surface.getWidth()))
        .append(" \u00D7 ") // multiplication sign
        .append(String.valueOf(surface.getHeight())).append("\n");
        message.append("Color format: ")
        .append(String.valueOf(Math.round(Math.pow(2, workingProtocol.getPixelFormat().depth))))
        .append(" colors (")
        .append(String.valueOf(workingProtocol.getPixelFormat().depth))
        .append(" bits)\n");
        message.append("Current protocol version: ")
        .append(workingProtocol.getProtocolVersion());
        if (workingProtocol.isTight()) {
            message.append("tight");
        }
        message.append("\n");

        JOptionPane infoPane = new JOptionPane(message.toString(), JOptionPane.INFORMATION_MESSAGE);
        final JDialog infoDialog = infoPane.createDialog(frame, "VNC connection info");
        infoDialog.setModalityType(Dialog.ModalityType.MODELESS);
        infoDialog.setVisible(true);
    }

    public void setVisible(boolean b) {
        frame.setVisible(b);
    }

    private void changeVncServer(ViewerInterface viewer, int x, int y, int width, int height, int scale, short id) {
        String localhost = "127.0.0.1"; // InetAddress.getLocalHost().getHostName()
        try {
            viewer.getRfb().changeVNCServer(viewer, localhost, ConnectionParams.DEFAULT_RFB_PORT, x, y, width, height, scale, id, null, null);
        } catch (Exception e1) {
            System.out.println("can't change server :" + e1.getMessage());
        }
    }

    public UiSettings getUiSettings() {
        return uiSettings;
    }
}