src/java.desktop/macosx/classes/com/apple/laf/AquaTabbedPaneCopyFromBasicUI.java - master - githubmirror/jdk17u-dev

src/java.desktop/macosx/classes/com/apple/laf/AquaTabbedPaneCopyFromBasicUI.java
3 827 строк152 KB
Alexei Voitylov
8349111: Enhance Swing supports
09 июл 2025, 07:33
09 июл 2025, 07:33f07c7d3
/*
 * Copyright (c) 2011, 2025, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * Copy of javax.swing.plaf.basic.BasicTabbedPaneUI because the original
 * does not have enough private methods marked as protected.
 *
 * This copy is from 1.6.0_04 as of 2008-02-02.
 */

package com.apple.laf;

import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.lang.reflect.InvocationTargetException;
import java.util.*;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.text.View;

import sun.swing.*;

public class AquaTabbedPaneCopyFromBasicUI extends TabbedPaneUI implements SwingConstants {
// Instance variables initialized at installation

    protected JTabbedPane tabPane;

    protected Color highlight;
    protected Color lightHighlight;
    protected Color shadow;
    protected Color darkShadow;
    protected Color focus;
    private Color selectedColor;

    protected int textIconGap;

    protected int tabRunOverlay;

    protected Insets tabInsets;
    protected Insets selectedTabPadInsets;
    protected Insets tabAreaInsets;
    protected Insets contentBorderInsets;
    private boolean tabsOverlapBorder;
    private boolean tabsOpaque = true;
    private boolean contentOpaque = true;

    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke upKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke downKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke leftKey;
    /**
     * As of Java 2 platform v1.3 this previously undocumented field is no
     * longer used.
     * Key bindings are now defined by the LookAndFeel, please refer to
     * the key bindings specification for further details.
     *
     * @deprecated As of Java 2 platform v1.3.
     */
    @Deprecated
    protected KeyStroke rightKey;

// Transient variables (recalculated each time TabbedPane is layed out)

    protected int[] tabRuns = new int[10];
    protected int runCount = 0;
    protected int selectedRun = -1;
    protected Rectangle[] rects = new Rectangle[0];
    protected int maxTabHeight;
    protected int maxTabWidth;

// Listeners

    protected ChangeListener tabChangeListener;
    protected PropertyChangeListener propertyChangeListener;
    protected MouseListener mouseListener;
    protected FocusListener focusListener;

// Private instance data

    private final Insets currentPadInsets = new Insets(0, 0, 0, 0);
    private final Insets currentTabAreaInsets = new Insets(0, 0, 0, 0);

    private Component visibleComponent;
    // PENDING(api): See comment for ContainerHandler
    private Vector<View> htmlViews;

    private Hashtable<Integer, Integer> mnemonicToIndexMap;

    /**
     * InputMap used for mnemonics. Only non-null if the JTabbedPane has
     * mnemonics associated with it. Lazily created in initMnemonics.
     */
    private InputMap mnemonicInputMap;

    // For use when tabLayoutPolicy = SCROLL_TAB_LAYOUT
    private ScrollableTabSupport tabScroller;

    private TabContainer tabContainer;

    /**
     * A rectangle used for general layout calculations in order
     * to avoid constructing many new Rectangles on the fly.
     */
    protected transient Rectangle calcRect = new Rectangle(0, 0, 0, 0);

    /**
     * Tab that has focus.
     */
    private int focusIndex;

    /**
     * Combined listeners.
     */
    private Handler handler;

    /**
     * Index of the tab the mouse is over.
     */
    private int rolloverTabIndex;

    /**
     * This is set to true when a component is added/removed from the tab
     * pane and set to false when layout happens.  If true it indicates that
     * tabRuns is not valid and shouldn't be used.
     */
    private boolean isRunsDirty;

    private boolean calculatedBaseline;
    private int baseline;

// UI creation

    public static ComponentUI createUI(final JComponent c) {
        return new AquaTabbedPaneCopyFromBasicUI();
    }

    // MACOSX adding accessor for superclass
    protected Component getTabComponentAt(final int i) {
        return tabPane.getTabComponentAt(i);
    }
    // END MACOSX

    static void loadActionMap(final LazyActionMap map) {
        map.put(new Actions(Actions.NEXT));
        map.put(new Actions(Actions.PREVIOUS));
        map.put(new Actions(Actions.RIGHT));
        map.put(new Actions(Actions.LEFT));
        map.put(new Actions(Actions.UP));
        map.put(new Actions(Actions.DOWN));
        map.put(new Actions(Actions.PAGE_UP));
        map.put(new Actions(Actions.PAGE_DOWN));
        map.put(new Actions(Actions.REQUEST_FOCUS));
        map.put(new Actions(Actions.REQUEST_FOCUS_FOR_VISIBLE));
        map.put(new Actions(Actions.SET_SELECTED));
        map.put(new Actions(Actions.SELECT_FOCUSED));
        map.put(new Actions(Actions.SCROLL_FORWARD));
        map.put(new Actions(Actions.SCROLL_BACKWARD));
    }

// UI Installation/De-installation

    public void installUI(final JComponent c) {
        this.tabPane = (JTabbedPane)c;

        calculatedBaseline = false;
        rolloverTabIndex = -1;
        focusIndex = -1;
        c.setLayout(createLayoutManager());
        installComponents();
        installDefaults();
        installListeners();
        installKeyboardActions();
    }

    public void uninstallUI(final JComponent c) {
        uninstallKeyboardActions();
        uninstallListeners();
        uninstallDefaults();
        uninstallComponents();
        c.setLayout(null);

        this.tabPane = null;
    }

    /**
     * Invoked by {@code installUI} to create
     * a layout manager object to manage
     * the {@code JTabbedPane}.
     *
     * @return a layout manager object
     *
     * @see TabbedPaneLayout
     * @see javax.swing.JTabbedPane#getTabLayoutPolicy
     */
    protected LayoutManager createLayoutManager() {
        if (tabPane.getTabLayoutPolicy() == JTabbedPane.SCROLL_TAB_LAYOUT) {
            return new TabbedPaneScrollLayout();
        } else { /* WRAP_TAB_LAYOUT */
            return new TabbedPaneLayout();
        }
    }

    /* In an attempt to preserve backward compatibility for programs
     * which have extended BasicTabbedPaneUI to do their own layout, the
     * UI uses the installed layoutManager (and not tabLayoutPolicy) to
     * determine if scrollTabLayout is enabled.
     */
    boolean scrollableTabLayoutEnabled() {
        return (tabPane.getLayout() instanceof TabbedPaneScrollLayout);
    }

    /**
     * Creates and installs any required subcomponents for the JTabbedPane.
     * Invoked by installUI.
     *
     * @since 1.4
     */
    protected void installComponents() {
        if (scrollableTabLayoutEnabled()) {
            if (tabScroller == null) {
                tabScroller = new ScrollableTabSupport(tabPane.getTabPlacement());
                tabPane.add(tabScroller.viewport);
            }
        }
        installTabContainer();
    }

    private void installTabContainer() {
        for (int i = 0; i < tabPane.getTabCount(); i++) {
            final Component tabComponent = tabPane.getTabComponentAt(i);
            if (tabComponent != null) {
                if (tabContainer == null) {
                    tabContainer = new TabContainer();
                }
                tabContainer.add(tabComponent);
            }
        }
        if (tabContainer == null) {
            return;
        }
        if (scrollableTabLayoutEnabled()) {
            tabScroller.tabPanel.add(tabContainer);
        } else {
            tabPane.add(tabContainer);
        }
    }

    /**
     * Creates and returns a JButton that will provide the user
     * with a way to scroll the tabs in a particular direction. The
     * returned JButton must be instance of UIResource.
     *
     * @param direction One of the SwingConstants constants:
     * SOUTH, NORTH, EAST or WEST
     * @return Widget for user to
     * @see javax.swing.JTabbedPane#setTabPlacement
     * @see javax.swing.SwingConstants
     * @throws IllegalArgumentException if direction is not one of
     *         NORTH, SOUTH, EAST or WEST
     * @since 1.5
     */
    protected JButton createScrollButton(final int direction) {
        if (direction != SOUTH && direction != NORTH && direction != EAST && direction != WEST) {
            throw new IllegalArgumentException("Direction must be one of: " + "SOUTH, NORTH, EAST or WEST");
        }
        return new ScrollableTabButton(direction);
    }

    /**
     * Removes any installed subcomponents from the JTabbedPane.
     * Invoked by uninstallUI.
     *
     * @since 1.4
     */
    protected void uninstallComponents() {
        uninstallTabContainer();
        if (scrollableTabLayoutEnabled()) {
            tabPane.remove(tabScroller.viewport);
            tabPane.remove(tabScroller.scrollForwardButton);
            tabPane.remove(tabScroller.scrollBackwardButton);
            tabScroller = null;
        }
    }

    private void uninstallTabContainer() {
        if (tabContainer == null) {
            return;
        }
        // Remove all the tabComponents, making sure not to notify
        // the tabbedpane.
        tabContainer.notifyTabbedPane = false;
        tabContainer.removeAll();
        if (scrollableTabLayoutEnabled()) {
            tabContainer.remove(tabScroller.croppedEdge);
            tabScroller.tabPanel.remove(tabContainer);
        } else {
            tabPane.remove(tabContainer);
        }
        tabContainer = null;
    }

    protected void installDefaults() {
        LookAndFeel.installColorsAndFont(tabPane, "TabbedPane.background", "TabbedPane.foreground", "TabbedPane.font");
        highlight = UIManager.getColor("TabbedPane.light");
        lightHighlight = UIManager.getColor("TabbedPane.highlight");
        shadow = UIManager.getColor("TabbedPane.shadow");
        darkShadow = UIManager.getColor("TabbedPane.darkShadow");
        focus = UIManager.getColor("TabbedPane.focus");
        selectedColor = UIManager.getColor("TabbedPane.selected");

        textIconGap = UIManager.getInt("TabbedPane.textIconGap");
        tabInsets = UIManager.getInsets("TabbedPane.tabInsets");
        selectedTabPadInsets = UIManager.getInsets("TabbedPane.selectedTabPadInsets");
        tabAreaInsets = UIManager.getInsets("TabbedPane.tabAreaInsets");
        tabsOverlapBorder = UIManager.getBoolean("TabbedPane.tabsOverlapBorder");
        contentBorderInsets = UIManager.getInsets("TabbedPane.contentBorderInsets");
        tabRunOverlay = UIManager.getInt("TabbedPane.tabRunOverlay");
        tabsOpaque = UIManager.getBoolean("TabbedPane.tabsOpaque");
        contentOpaque = UIManager.getBoolean("TabbedPane.contentOpaque");
        Object opaque = UIManager.get("TabbedPane.opaque");
        if (opaque == null) {
            opaque = Boolean.FALSE;
        }
        LookAndFeel.installProperty(tabPane, "opaque", opaque);
    }

    protected void uninstallDefaults() {
        highlight = null;
        lightHighlight = null;
        shadow = null;
        darkShadow = null;
        focus = null;
        tabInsets = null;
        selectedTabPadInsets = null;
        tabAreaInsets = null;
        contentBorderInsets = null;
    }

    protected void installListeners() {
        if ((propertyChangeListener = createPropertyChangeListener()) != null) {
            tabPane.addPropertyChangeListener(propertyChangeListener);
        }
        if ((tabChangeListener = createChangeListener()) != null) {
            tabPane.addChangeListener(tabChangeListener);
        }
        if ((mouseListener = createMouseListener()) != null) {
            tabPane.addMouseListener(mouseListener);
        }
        tabPane.addMouseMotionListener(getHandler());
        if ((focusListener = createFocusListener()) != null) {
            tabPane.addFocusListener(focusListener);
        }
        tabPane.addContainerListener(getHandler());
        if (tabPane.getTabCount() > 0) {
            Boolean htmlDisabled = (Boolean)
                                   tabPane.getClientProperty("html.disable");
            if (!(Boolean.TRUE.equals(htmlDisabled))) {
                htmlViews = createHTMLVector();
            }
        }
    }

    protected void uninstallListeners() {
        if (mouseListener != null) {
            tabPane.removeMouseListener(mouseListener);
            mouseListener = null;
        }
        tabPane.removeMouseMotionListener(getHandler());
        if (focusListener != null) {
            tabPane.removeFocusListener(focusListener);
            focusListener = null;
        }

        tabPane.removeContainerListener(getHandler());
        if (htmlViews != null) {
            htmlViews.removeAllElements();
            htmlViews = null;
        }
        if (tabChangeListener != null) {
            tabPane.removeChangeListener(tabChangeListener);
            tabChangeListener = null;
        }
        if (propertyChangeListener != null) {
            tabPane.removePropertyChangeListener(propertyChangeListener);
            propertyChangeListener = null;
        }
        handler = null;
    }

    protected MouseListener createMouseListener() {
        return getHandler();
    }

    protected FocusListener createFocusListener() {
        return getHandler();
    }

    protected ChangeListener createChangeListener() {
        return getHandler();
    }

    protected PropertyChangeListener createPropertyChangeListener() {
        return getHandler();
    }

    private Handler getHandler() {
        if (handler == null) {
            handler = new Handler();
        }
        return handler;
    }

    protected void installKeyboardActions() {
        InputMap km = getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);

        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, km);
        km = getInputMap(JComponent.WHEN_FOCUSED);
        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_FOCUSED, km);

        LazyActionMap.installLazyActionMap(tabPane, AquaTabbedPaneCopyFromBasicUI.class, "TabbedPane.actionMap");
        updateMnemonics();
    }

    InputMap getInputMap(final int condition) {
        if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
            return (InputMap)DefaultLookup.get(tabPane, this, "TabbedPane.ancestorInputMap");
        } else if (condition == JComponent.WHEN_FOCUSED) {
            return (InputMap)DefaultLookup.get(tabPane, this, "TabbedPane.focusInputMap");
        }
        return null;
    }

    protected void uninstallKeyboardActions() {
        SwingUtilities.replaceUIActionMap(tabPane, null);
        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, null);
        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_FOCUSED, null);
        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_IN_FOCUSED_WINDOW, null);
        mnemonicToIndexMap = null;
        mnemonicInputMap = null;
    }

    /**
     * Reloads the mnemonics. This should be invoked when a memonic changes,
     * when the title of a mnemonic changes, or when tabs are added/removed.
     */
    private void updateMnemonics() {
        resetMnemonics();
        for (int counter = tabPane.getTabCount() - 1; counter >= 0; counter--) {
            final int mnemonic = tabPane.getMnemonicAt(counter);

            if (mnemonic > 0) {
                addMnemonic(counter, mnemonic);
            }
        }
    }

    /**
     * Resets the mnemonics bindings to an empty state.
     */
    private void resetMnemonics() {
        if (mnemonicToIndexMap != null) {
            mnemonicToIndexMap.clear();
            mnemonicInputMap.clear();
        }
    }

    /**
     * Adds the specified mnemonic at the specified index.
     */
    @SuppressWarnings("deprecation")
    private void addMnemonic(final int index, final int mnemonic) {
        if (mnemonicToIndexMap == null) {
            initMnemonics();
        }
        // [2165820] Mac OS X change: mnemonics need to be triggered with ctrl-option, not just option.
        mnemonicInputMap.put(KeyStroke.getKeyStroke(mnemonic, Event.ALT_MASK | Event.CTRL_MASK), "setSelectedIndex");
        mnemonicToIndexMap.put(Integer.valueOf(mnemonic), Integer.valueOf(index));
    }

    /**
     * Installs the state needed for mnemonics.
     */
    private void initMnemonics() {
        mnemonicToIndexMap = new Hashtable<Integer, Integer>();
        mnemonicInputMap = new ComponentInputMapUIResource(tabPane);
        mnemonicInputMap.setParent(SwingUtilities.getUIInputMap(tabPane, JComponent.WHEN_IN_FOCUSED_WINDOW));
        SwingUtilities.replaceUIInputMap(tabPane, JComponent.WHEN_IN_FOCUSED_WINDOW, mnemonicInputMap);
    }

    /**
     * Sets the tab the mouse is over by location. This is a cover method
     * for {@code setRolloverTab(tabForCoordinate(x, y, false))}.
     */
    private void setRolloverTab(final int x, final int y) {
        // NOTE:
        // This calls in with false otherwise it could trigger a validate,
        // which should NOT happen if the user is only dragging the
        // mouse around.
        setRolloverTab(tabForCoordinate(tabPane, x, y, false));
    }

    /**
     * Sets the tab the mouse is currently over to {@code index}.
     * {@code index} will be -1 if the mouse is no longer over any
     * tab. No checking is done to ensure the passed in index identifies a
     * valid tab.
     *
     * @param index Index of the tab the mouse is over.
     * @since 1.5
     */
    protected void setRolloverTab(final int index) {
        rolloverTabIndex = index;
    }

    /**
     * Returns the tab the mouse is currently over, or {@code -1} if the mouse is no
     * longer over any tab.
     *
     * @return the tab the mouse is currently over, or {@code -1} if the mouse is no
     * longer over any tab
     * @since 1.5
     */
    protected int getRolloverTab() {
        return rolloverTabIndex;
    }

    public Dimension getMinimumSize(final JComponent c) {
        // Default to LayoutManager's minimumLayoutSize
        return null;
    }

    public Dimension getMaximumSize(final JComponent c) {
        // Default to LayoutManager's maximumLayoutSize
        return null;
    }

    /**
     * Returns the baseline.
     *
     * @throws NullPointerException {@inheritDoc}
     * @throws IllegalArgumentException {@inheritDoc}
     * @see javax.swing.JComponent#getBaseline(int, int)
     * @since 1.6
     */
    public int getBaseline(final JComponent c, final int width, final int height) {
        super.getBaseline(c, width, height);
        int baseline = calculateBaselineIfNecessary();
        if (baseline != -1) {
            final int placement = tabPane.getTabPlacement();
            final Insets insets = tabPane.getInsets();
            final Insets tabAreaInsets = getTabAreaInsets(placement);
            switch (placement) {
                case SwingConstants.TOP:
                    baseline += insets.top + tabAreaInsets.top;
                    return baseline;
                case SwingConstants.BOTTOM:
                    baseline = height - insets.bottom - tabAreaInsets.bottom - maxTabHeight + baseline;
                    return baseline;
                case SwingConstants.LEFT:
                case SwingConstants.RIGHT:
                    baseline += insets.top + tabAreaInsets.top;
                    return baseline;
            }
        }
        return -1;
    }

    /**
     * Returns an enum indicating how the baseline of the component
     * changes as the size changes.
     *
     * @throws NullPointerException {@inheritDoc}
     * @see javax.swing.JComponent#getBaseline(int, int)
     * @since 1.6
     */
    public Component.BaselineResizeBehavior getBaselineResizeBehavior(final JComponent c) {
        super.getBaselineResizeBehavior(c);
        switch (tabPane.getTabPlacement()) {
            case SwingConstants.LEFT:
            case SwingConstants.RIGHT:
            case SwingConstants.TOP:
                return Component.BaselineResizeBehavior.CONSTANT_ASCENT;
            case SwingConstants.BOTTOM:
                return Component.BaselineResizeBehavior.CONSTANT_DESCENT;
        }
        return Component.BaselineResizeBehavior.OTHER;
    }

    /**
     * Returns the baseline for the specified tab.
     *
     * @param tab index of tab to get baseline for
     * @exception IndexOutOfBoundsException if index is out of range
     *            (index < 0 || index >= tab count)
     * @return baseline or a value &lt; 0 indicating there is no reasonable
     *                  baseline
     * @since 1.6
     */
    protected int getBaseline(final int tab) {
        if (tabPane.getTabComponentAt(tab) != null) {
            final int offset = getBaselineOffset();
            if (offset != 0) {
                // The offset is not applied to the tab component, and so
                // in general we can't get good alignment like with components
                // in the tab.
                return -1;
            }
            final Component c = tabPane.getTabComponentAt(tab);
            final Dimension pref = c.getPreferredSize();
            final Insets tabInsets = getTabInsets(tabPane.getTabPlacement(), tab);
            final int cellHeight = maxTabHeight - tabInsets.top - tabInsets.bottom;
            return c.getBaseline(pref.width, pref.height) + (cellHeight - pref.height) / 2 + tabInsets.top;
        } else {
            final View view = getTextViewForTab(tab);
            if (view != null) {
                final int viewHeight = (int)view.getPreferredSpan(View.Y_AXIS);
                final int baseline = BasicHTML.getHTMLBaseline(view, (int)view.getPreferredSpan(View.X_AXIS), viewHeight);
                if (baseline >= 0) {
                    return maxTabHeight / 2 - viewHeight / 2 + baseline + getBaselineOffset();
                }
                return -1;
            }
        }
        final FontMetrics metrics = getFontMetrics();
        final int fontHeight = metrics.getHeight();
        final int fontBaseline = metrics.getAscent();
        return maxTabHeight / 2 - fontHeight / 2 + fontBaseline + getBaselineOffset();
    }

    /**
     * Returns the amount the baseline is offset by.  This is typically
     * the same as {@code getTabLabelShiftY}.
     *
     * @return amount to offset the baseline by
     * @since 1.6
     */
    protected int getBaselineOffset() {
        switch (tabPane.getTabPlacement()) {
            case SwingConstants.TOP:
                if (tabPane.getTabCount() > 1) {
                    return 1;
                } else {
                    return -1;
                }
            case SwingConstants.BOTTOM:
                if (tabPane.getTabCount() > 1) {
                    return -1;
                } else {
                    return 1;
                }
            default: // RIGHT|LEFT
                return (maxTabHeight % 2);
        }
    }

    private int calculateBaselineIfNecessary() {
        if (!calculatedBaseline) {
            calculatedBaseline = true;
            baseline = -1;
            if (tabPane.getTabCount() > 0) {
                calculateBaseline();
            }
        }
        return baseline;
    }

    private void calculateBaseline() {
        final int tabCount = tabPane.getTabCount();
        final int tabPlacement = tabPane.getTabPlacement();
        maxTabHeight = calculateMaxTabHeight(tabPlacement);
        baseline = getBaseline(0);
        if (isHorizontalTabPlacement()) {
            for (int i = 1; i < tabCount; i++) {
                if (getBaseline(i) != baseline) {
                    baseline = -1;
                    break;
                }
            }
        } else {
            // left/right, tabs may be different sizes.
            final FontMetrics fontMetrics = getFontMetrics();
            final int fontHeight = fontMetrics.getHeight();
            final int height = calculateTabHeight(tabPlacement, 0, fontHeight);
            for (int i = 1; i < tabCount; i++) {
                final int newHeight = calculateTabHeight(tabPlacement, i, fontHeight);
                if (height != newHeight) {
                    // assume different baseline
                    baseline = -1;
                    break;
                }
            }
        }
    }

// UI Rendering

    public void paint(final Graphics g, final JComponent c) {
        final int selectedIndex = tabPane.getSelectedIndex();
        final int tabPlacement = tabPane.getTabPlacement();

        ensureCurrentLayout();

        // Paint content border and tab area
        if (tabsOverlapBorder) {
            paintContentBorder(g, tabPlacement, selectedIndex);
        }
        // If scrollable tabs are enabled, the tab area will be
        // painted by the scrollable tab panel instead.
        //
        if (!scrollableTabLayoutEnabled()) { // WRAP_TAB_LAYOUT
            paintTabArea(g, tabPlacement, selectedIndex);
        }
        if (!tabsOverlapBorder) {
            paintContentBorder(g, tabPlacement, selectedIndex);
        }
    }

    /**
     * Paints the tabs in the tab area.
     * Invoked by paint().
     * The graphics parameter must be a valid {@code Graphics}
     * object.  Tab placement may be either:
     * {@code JTabbedPane.TOP}, {@code JTabbedPane.BOTTOM},
     * {@code JTabbedPane.LEFT}, or {@code JTabbedPane.RIGHT}.
     * The selected index must be a valid tabbed pane tab index (0 to
     * tab count - 1, inclusive) or -1 if no tab is currently selected.
     * The handling of invalid parameters is unspecified.
     *
     * @param g the graphics object to use for rendering
     * @param tabPlacement the placement for the tabs within the JTabbedPane
     * @param selectedIndex the tab index of the selected component
     *
     * @since 1.4
     */
    protected void paintTabArea(final Graphics g, final int tabPlacement, final int selectedIndex) {
        final int tabCount = tabPane.getTabCount();

        final Rectangle iconRect = new Rectangle(), textRect = new Rectangle();
        final Rectangle clipRect = g.getClipBounds();

        // Paint tabRuns of tabs from back to front
        for (int i = runCount - 1; i >= 0; i--) {
            final int start = tabRuns[i];
            final int next = tabRuns[(i == runCount - 1) ? 0 : i + 1];
            final int end = (next != 0 ? next - 1 : tabCount - 1);
            for (int j = start; j <= end; j++) {
                if (j != selectedIndex && rects[j].intersects(clipRect)) {
                    paintTab(g, tabPlacement, rects, j, iconRect, textRect);
                }
            }
        }

        // Paint selected tab if its in the front run
        // since it may overlap other tabs
        if (selectedIndex >= 0 && rects[selectedIndex].intersects(clipRect)) {
            paintTab(g, tabPlacement, rects, selectedIndex, iconRect, textRect);
        }
    }

    protected void paintTab(final Graphics g, final int tabPlacement, final Rectangle[] rects, final int tabIndex, final Rectangle iconRect, final Rectangle textRect) {
        final Rectangle tabRect = rects[tabIndex];
        final int selectedIndex = tabPane.getSelectedIndex();
        final boolean isSelected = selectedIndex == tabIndex;

        if (tabsOpaque || tabPane.isOpaque()) {
            paintTabBackground(g, tabPlacement, tabIndex, tabRect.x, tabRect.y, tabRect.width, tabRect.height, isSelected);
        }

        paintTabBorder(g, tabPlacement, tabIndex, tabRect.x, tabRect.y, tabRect.width, tabRect.height, isSelected);

        final String title = tabPane.getTitleAt(tabIndex);
        final Font font = tabPane.getFont();
        final FontMetrics metrics = SwingUtilities2.getFontMetrics(tabPane, g, font);
        final Icon icon = getIconForTab(tabIndex);

        layoutLabel(tabPlacement, metrics, tabIndex, title, icon, tabRect, iconRect, textRect, isSelected);

        if (tabPane.getTabComponentAt(tabIndex) == null) {
            String clippedTitle = title;

            if (scrollableTabLayoutEnabled() && tabScroller.croppedEdge.isParamsSet() && tabScroller.croppedEdge.getTabIndex() == tabIndex && isHorizontalTabPlacement()) {
                final int availTextWidth = tabScroller.croppedEdge.getCropline() - (textRect.x - tabRect.x) - tabScroller.croppedEdge.getCroppedSideWidth();
                clippedTitle = SwingUtilities2.clipStringIfNecessary(null, metrics, title, availTextWidth);
            }

            paintText(g, tabPlacement, font, metrics, tabIndex, clippedTitle, textRect, isSelected);

            paintIcon(g, tabPlacement, tabIndex, icon, iconRect, isSelected);
        }
        paintFocusIndicator(g, tabPlacement, rects, tabIndex, iconRect, textRect, isSelected);
    }

    private boolean isHorizontalTabPlacement() {
        return tabPane.getTabPlacement() == TOP || tabPane.getTabPlacement() == BOTTOM;
    }

    /* This method will create and return a polygon shape for the given tab rectangle
     * which has been cropped at the specified cropline with a torn edge visual.
     * e.g. A "File" tab which has cropped been cropped just after the "i":
     *             -------------
     *             |  .....     |
     *             |  .          |
     *             |  ...  .    |
     *             |  .    .   |
     *             |  .    .    |
     *             |  .    .     |
     *             --------------
     *
     * The x, y arrays below define the pattern used to create a "torn" edge
     * segment which is repeated to fill the edge of the tab.
     * For tabs placed on TOP and BOTTOM, this righthand torn edge is created by
     * line segments which are defined by coordinates obtained by
     * subtracting xCropLen[i] from (tab.x + tab.width) and adding yCroplen[i]
     * to (tab.y).
     * For tabs placed on LEFT or RIGHT, the bottom torn edge is created by
     * subtracting xCropLen[i] from (tab.y + tab.height) and adding yCropLen[i]
     * to (tab.x).
     */
    private static int[] xCropLen = { 1, 1, 0, 0, 1, 1, 2, 2 };
    private static int[] yCropLen = { 0, 3, 3, 6, 6, 9, 9, 12 };
    private static final int CROP_SEGMENT = 12;

    private static Polygon createCroppedTabShape(final int tabPlacement, final Rectangle tabRect, final int cropline) {
        int rlen = 0;
        int start = 0;
        int end = 0;
        int ostart = 0;

        switch (tabPlacement) {
            case LEFT:
            case RIGHT:
                rlen = tabRect.width;
                start = tabRect.x;
                end = tabRect.x + tabRect.width;
                ostart = tabRect.y + tabRect.height;
                break;
            case TOP:
            case BOTTOM:
            default:
                rlen = tabRect.height;
                start = tabRect.y;
                end = tabRect.y + tabRect.height;
                ostart = tabRect.x + tabRect.width;
        }
        int rcnt = rlen / CROP_SEGMENT;
        if (rlen % CROP_SEGMENT > 0) {
            rcnt++;
        }
        final int npts = 2 + (rcnt * 8);
        final int[] xp = new int[npts];
        final int[] yp = new int[npts];
        int pcnt = 0;

        xp[pcnt] = ostart;
        yp[pcnt++] = end;
        xp[pcnt] = ostart;
        yp[pcnt++] = start;
        for (int i = 0; i < rcnt; i++) {
            for (int j = 0; j < xCropLen.length; j++) {
                xp[pcnt] = cropline - xCropLen[j];
                yp[pcnt] = start + (i * CROP_SEGMENT) + yCropLen[j];
                if (yp[pcnt] >= end) {
                    yp[pcnt] = end;
                    pcnt++;
                    break;
                }
                pcnt++;
            }
        }
        if (tabPlacement == SwingConstants.TOP || tabPlacement == SwingConstants.BOTTOM) {
            return new Polygon(xp, yp, pcnt);

        } else { // LEFT or RIGHT
            return new Polygon(yp, xp, pcnt);
        }
    }

    /* If tabLayoutPolicy == SCROLL_TAB_LAYOUT, this method will paint an edge
     * indicating the tab is cropped in the viewport display
     */
    private void paintCroppedTabEdge(final Graphics g) {
        final int tabIndex = tabScroller.croppedEdge.getTabIndex();
        final int cropline = tabScroller.croppedEdge.getCropline();
        int x, y;
        switch (tabPane.getTabPlacement()) {
            case LEFT:
            case RIGHT:
                x = rects[tabIndex].x;
                y = cropline;
                int xx = x;
                g.setColor(shadow);
                while (xx <= x + rects[tabIndex].width) {
                    for (int i = 0; i < xCropLen.length; i += 2) {
                        g.drawLine(xx + yCropLen[i], y - xCropLen[i], xx + yCropLen[i + 1] - 1, y - xCropLen[i + 1]);
                    }
                    xx += CROP_SEGMENT;
                }
                break;
            case TOP:
            case BOTTOM:
            default:
                x = cropline;
                y = rects[tabIndex].y;
                int yy = y;
                g.setColor(shadow);
                while (yy <= y + rects[tabIndex].height) {
                    for (int i = 0; i < xCropLen.length; i += 2) {
                        g.drawLine(x - xCropLen[i], yy + yCropLen[i], x - xCropLen[i + 1], yy + yCropLen[i + 1] - 1);
                    }
                    yy += CROP_SEGMENT;
                }
        }
    }

    protected void layoutLabel(final int tabPlacement, final FontMetrics metrics, final int tabIndex, final String title, final Icon icon, final Rectangle tabRect, final Rectangle iconRect, final Rectangle textRect, final boolean isSelected) {
        textRect.x = textRect.y = iconRect.x = iconRect.y = 0;

        final View v = getTextViewForTab(tabIndex);
        if (v != null) {
            tabPane.putClientProperty("html", v);
        }

        SwingUtilities.layoutCompoundLabel(tabPane, metrics, title, icon, SwingConstants.CENTER, SwingConstants.CENTER, SwingConstants.CENTER, SwingConstants.TRAILING, tabRect, iconRect, textRect, textIconGap);

        tabPane.putClientProperty("html", null);

        final int xNudge = getTabLabelShiftX(tabPlacement, tabIndex, isSelected);
        final int yNudge = getTabLabelShiftY(tabPlacement, tabIndex, isSelected);
        iconRect.x += xNudge;
        iconRect.y += yNudge;
        textRect.x += xNudge;
        textRect.y += yNudge;
    }

    protected void paintIcon(final Graphics g, final int tabPlacement, final int tabIndex, final Icon icon, final Rectangle iconRect, final boolean isSelected) {
        if (icon != null) {
            icon.paintIcon(tabPane, g, iconRect.x, iconRect.y);
        }
    }

    protected void paintText(final Graphics g, final int tabPlacement, final Font font, final FontMetrics metrics, final int tabIndex, final String title, final Rectangle textRect, final boolean isSelected) {

        g.setFont(font);

        final View v = getTextViewForTab(tabIndex);
        if (v != null) {
            // html
            v.paint(g, textRect);
        } else {
            // plain text
            final int mnemIndex = tabPane.getDisplayedMnemonicIndexAt(tabIndex);

            if (tabPane.isEnabled() && tabPane.isEnabledAt(tabIndex)) {
                Color fg = tabPane.getForegroundAt(tabIndex);
                if (isSelected && (fg instanceof UIResource)) {
                    final Color selectedFG = UIManager.getColor("TabbedPane.selectedForeground");
                    if (selectedFG != null) {
                        fg = selectedFG;
                    }
                }
                g.setColor(fg);
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());

            } else { // tab disabled
                g.setColor(tabPane.getBackgroundAt(tabIndex).brighter());
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex, textRect.x, textRect.y + metrics.getAscent());
                g.setColor(tabPane.getBackgroundAt(tabIndex).darker());
                SwingUtilities2.drawStringUnderlineCharAt(tabPane, g, title, mnemIndex, textRect.x - 1, textRect.y + metrics.getAscent() - 1);

            }
        }
    }

    protected int getTabLabelShiftX(final int tabPlacement, final int tabIndex, final boolean isSelected) {
        final Rectangle tabRect = rects[tabIndex];
        int nudge = 0;
        switch (tabPlacement) {
            case LEFT:
                nudge = isSelected ? -1 : 1;
                break;
            case RIGHT:
                nudge = isSelected ? 1 : -1;
                break;
            case BOTTOM:
            case TOP:
            default:
                nudge = tabRect.width % 2;
        }
        return nudge;
    }

    protected int getTabLabelShiftY(final int tabPlacement, final int tabIndex, final boolean isSelected) {
        final Rectangle tabRect = rects[tabIndex];
        int nudge = 0;
        switch (tabPlacement) {
            case BOTTOM:
                nudge = isSelected ? 1 : -1;
                break;
            case LEFT:
            case RIGHT:
                nudge = tabRect.height % 2;
                break;
            case TOP:
            default:
                nudge = isSelected ? -1 : 1;
                ;
        }
        return nudge;
    }

    protected void paintFocusIndicator(final Graphics g, final int tabPlacement, final Rectangle[] rects, final int tabIndex, final Rectangle iconRect, final Rectangle textRect, final boolean isSelected) {
        final Rectangle tabRect = rects[tabIndex];
        if (tabPane.hasFocus() && isSelected) {
            int x, y, w, h;
            g.setColor(focus);
            switch (tabPlacement) {
                case LEFT:
                    x = tabRect.x + 3;
                    y = tabRect.y + 3;
                    w = tabRect.width - 5;
                    h = tabRect.height - 6;
                    break;
                case RIGHT:
                    x = tabRect.x + 2;
                    y = tabRect.y + 3;
                    w = tabRect.width - 5;
                    h = tabRect.height - 6;
                    break;
                case BOTTOM:
                    x = tabRect.x + 3;
                    y = tabRect.y + 2;
                    w = tabRect.width - 6;
                    h = tabRect.height - 5;
                    break;
                case TOP:
                default:
                    x = tabRect.x + 3;
                    y = tabRect.y + 3;
                    w = tabRect.width - 6;
                    h = tabRect.height - 5;
            }
            BasicGraphicsUtils.drawDashedRect(g, x, y, w, h);
        }
    }

    /**
     * this function draws the border around each tab
     * note that this function does now draw the background of the tab.
     * that is done elsewhere
     */
    protected void paintTabBorder(final Graphics g, final int tabPlacement, final int tabIndex, final int x, final int y, final int w, final int h, final boolean isSelected) {
        g.setColor(lightHighlight);

        switch (tabPlacement) {
            case LEFT:
                g.drawLine(x + 1, y + h - 2, x + 1, y + h - 2); // bottom-left highlight
                g.drawLine(x, y + 2, x, y + h - 3); // left highlight
                g.drawLine(x + 1, y + 1, x + 1, y + 1); // top-left highlight
                g.drawLine(x + 2, y, x + w - 1, y); // top highlight

                g.setColor(shadow);
                g.drawLine(x + 2, y + h - 2, x + w - 1, y + h - 2); // bottom shadow

                g.setColor(darkShadow);
                g.drawLine(x + 2, y + h - 1, x + w - 1, y + h - 1); // bottom dark shadow
                break;
            case RIGHT:
                g.drawLine(x, y, x + w - 3, y); // top highlight

                g.setColor(shadow);
                g.drawLine(x, y + h - 2, x + w - 3, y + h - 2); // bottom shadow
                g.drawLine(x + w - 2, y + 2, x + w - 2, y + h - 3); // right shadow

                g.setColor(darkShadow);
                g.drawLine(x + w - 2, y + 1, x + w - 2, y + 1); // top-right dark shadow
                g.drawLine(x + w - 2, y + h - 2, x + w - 2, y + h - 2); // bottom-right dark shadow
                g.drawLine(x + w - 1, y + 2, x + w - 1, y + h - 3); // right dark shadow
                g.drawLine(x, y + h - 1, x + w - 3, y + h - 1); // bottom dark shadow
                break;
            case BOTTOM:
                g.drawLine(x, y, x, y + h - 3); // left highlight
                g.drawLine(x + 1, y + h - 2, x + 1, y + h - 2); // bottom-left highlight

                g.setColor(shadow);
                g.drawLine(x + 2, y + h - 2, x + w - 3, y + h - 2); // bottom shadow
                g.drawLine(x + w - 2, y, x + w - 2, y + h - 3); // right shadow

                g.setColor(darkShadow);
                g.drawLine(x + 2, y + h - 1, x + w - 3, y + h - 1); // bottom dark shadow
                g.drawLine(x + w - 2, y + h - 2, x + w - 2, y + h - 2); // bottom-right dark shadow
                g.drawLine(x + w - 1, y, x + w - 1, y + h - 3); // right dark shadow
                break;
            case TOP:
            default:
                g.drawLine(x, y + 2, x, y + h - 1); // left highlight
                g.drawLine(x + 1, y + 1, x + 1, y + 1); // top-left highlight
                g.drawLine(x + 2, y, x + w - 3, y); // top highlight

                g.setColor(shadow);
                g.drawLine(x + w - 2, y + 2, x + w - 2, y + h - 1); // right shadow

                g.setColor(darkShadow);
                g.drawLine(x + w - 1, y + 2, x + w - 1, y + h - 1); // right dark-shadow
                g.drawLine(x + w - 2, y + 1, x + w - 2, y + 1); // top-right shadow
        }
    }

    protected void paintTabBackground(final Graphics g, final int tabPlacement, final int tabIndex, final int x, final int y, final int w, final int h, boolean isSelected) {
        g.setColor(!isSelected || selectedColor == null ? tabPane.getBackgroundAt(tabIndex) : selectedColor);
        switch (tabPlacement) {
            case LEFT:
                g.fillRect(x + 1, y + 1, w - 1, h - 3);
                break;
            case RIGHT:
                g.fillRect(x, y + 1, w - 2, h - 3);
                break;
            case BOTTOM:
                g.fillRect(x + 1, y, w - 3, h - 1);
                break;
            case TOP:
            default:
                g.fillRect(x + 1, y + 1, w - 3, h - 1);
        }
    }

    protected void paintContentBorder(final Graphics g, final int tabPlacement, final int selectedIndex) {
        final int width = tabPane.getWidth();
        final int height = tabPane.getHeight();
        final Insets insets = tabPane.getInsets();
        final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);

        int x = insets.left;
        int y = insets.top;
        int w = width - insets.right - insets.left;
        int h = height - insets.top - insets.bottom;

        switch (tabPlacement) {
            case LEFT:
                x += calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                if (tabsOverlapBorder) {
                    x -= tabAreaInsets.right;
                }
                w -= (x - insets.left);
                break;
            case RIGHT:
                w -= calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                if (tabsOverlapBorder) {
                    w += tabAreaInsets.left;
                }
                break;
            case BOTTOM:
                h -= calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                if (tabsOverlapBorder) {
                    h += tabAreaInsets.top;
                }
                break;
            case TOP:
            default:
                y += calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                if (tabsOverlapBorder) {
                    y -= tabAreaInsets.bottom;
                }
                h -= (y - insets.top);
        }

        if (tabPane.getTabCount() > 0 && (contentOpaque || tabPane.isOpaque())) {
            // Fill region behind content area
            final Color color = UIManager.getColor("TabbedPane.contentAreaColor");
            if (color != null) {
                g.setColor(color);
            } else if (selectedColor == null || selectedIndex == -1) {
                g.setColor(tabPane.getBackground());
            } else {
                g.setColor(selectedColor);
            }
            g.fillRect(x, y, w, h);
        }

        paintContentBorderTopEdge(g, tabPlacement, selectedIndex, x, y, w, h);
        paintContentBorderLeftEdge(g, tabPlacement, selectedIndex, x, y, w, h);
        paintContentBorderBottomEdge(g, tabPlacement, selectedIndex, x, y, w, h);
        paintContentBorderRightEdge(g, tabPlacement, selectedIndex, x, y, w, h);

    }

    protected void paintContentBorderTopEdge(final Graphics g, final int tabPlacement, final int selectedIndex, final int x, final int y, final int w, final int h) {
        final Rectangle selRect = selectedIndex < 0 ? null : getTabBounds(selectedIndex, calcRect);

        g.setColor(lightHighlight);

        // Draw unbroken line if tabs are not on TOP, OR
        // selected tab is not in run adjacent to content, OR
        // selected tab is not visible (SCROLL_TAB_LAYOUT)
        //
        if (tabPlacement != TOP || selectedIndex < 0 || (selRect.y + selRect.height + 1 < y) || (selRect.x < x || selRect.x > x + w)) {
            g.drawLine(x, y, x + w - 2, y);
        } else {
            // Break line to show visual connection to selected tab
            g.drawLine(x, y, selRect.x - 1, y);
            if (selRect.x + selRect.width < x + w - 2) {
                g.drawLine(selRect.x + selRect.width, y, x + w - 2, y);
            } else {
                g.setColor(shadow);
                g.drawLine(x + w - 2, y, x + w - 2, y);
            }
        }
    }

    protected void paintContentBorderLeftEdge(final Graphics g, final int tabPlacement, final int selectedIndex, final int x, final int y, final int w, final int h) {
        final Rectangle selRect = selectedIndex < 0 ? null : getTabBounds(selectedIndex, calcRect);

        g.setColor(lightHighlight);

        // Draw unbroken line if tabs are not on LEFT, OR
        // selected tab is not in run adjacent to content, OR
        // selected tab is not visible (SCROLL_TAB_LAYOUT)
        //
        if (tabPlacement != LEFT || selectedIndex < 0 || (selRect.x + selRect.width + 1 < x) || (selRect.y < y || selRect.y > y + h)) {
            g.drawLine(x, y, x, y + h - 2);
        } else {
            // Break line to show visual connection to selected tab
            g.drawLine(x, y, x, selRect.y - 1);
            if (selRect.y + selRect.height < y + h - 2) {
                g.drawLine(x, selRect.y + selRect.height, x, y + h - 2);
            }
        }
    }

    protected void paintContentBorderBottomEdge(final Graphics g, final int tabPlacement, final int selectedIndex, final int x, final int y, final int w, final int h) {
        final Rectangle selRect = selectedIndex < 0 ? null : getTabBounds(selectedIndex, calcRect);

        g.setColor(shadow);

        // Draw unbroken line if tabs are not on BOTTOM, OR
        // selected tab is not in run adjacent to content, OR
        // selected tab is not visible (SCROLL_TAB_LAYOUT)
        //
        if (tabPlacement != BOTTOM || selectedIndex < 0 || (selRect.y - 1 > h) || (selRect.x < x || selRect.x > x + w)) {
            g.drawLine(x + 1, y + h - 2, x + w - 2, y + h - 2);
            g.setColor(darkShadow);
            g.drawLine(x, y + h - 1, x + w - 1, y + h - 1);
        } else {
            // Break line to show visual connection to selected tab
            g.drawLine(x + 1, y + h - 2, selRect.x - 1, y + h - 2);
            g.setColor(darkShadow);
            g.drawLine(x, y + h - 1, selRect.x - 1, y + h - 1);
            if (selRect.x + selRect.width < x + w - 2) {
                g.setColor(shadow);
                g.drawLine(selRect.x + selRect.width, y + h - 2, x + w - 2, y + h - 2);
                g.setColor(darkShadow);
                g.drawLine(selRect.x + selRect.width, y + h - 1, x + w - 1, y + h - 1);
            }
        }

    }

    protected void paintContentBorderRightEdge(final Graphics g, final int tabPlacement, final int selectedIndex, final int x, final int y, final int w, final int h) {
        final Rectangle selRect = selectedIndex < 0 ? null : getTabBounds(selectedIndex, calcRect);

        g.setColor(shadow);

        // Draw unbroken line if tabs are not on RIGHT, OR
        // selected tab is not in run adjacent to content, OR
        // selected tab is not visible (SCROLL_TAB_LAYOUT)
        //
        if (tabPlacement != RIGHT || selectedIndex < 0 || (selRect.x - 1 > w) || (selRect.y < y || selRect.y > y + h)) {
            g.drawLine(x + w - 2, y + 1, x + w - 2, y + h - 3);
            g.setColor(darkShadow);
            g.drawLine(x + w - 1, y, x + w - 1, y + h - 1);
        } else {
            // Break line to show visual connection to selected tab
            g.drawLine(x + w - 2, y + 1, x + w - 2, selRect.y - 1);
            g.setColor(darkShadow);
            g.drawLine(x + w - 1, y, x + w - 1, selRect.y - 1);

            if (selRect.y + selRect.height < y + h - 2) {
                g.setColor(shadow);
                g.drawLine(x + w - 2, selRect.y + selRect.height, x + w - 2, y + h - 2);
                g.setColor(darkShadow);
                g.drawLine(x + w - 1, selRect.y + selRect.height, x + w - 1, y + h - 2);
            }
        }
    }

    protected void ensureCurrentLayout() {
        if (!tabPane.isValid()) {
            tabPane.validate();
        }
        /* If tabPane doesn't have a peer yet, the validate() call will
         * silently fail.  We handle that by forcing a layout if tabPane
         * is still invalid.  See bug 4237677.
         */
        if (!tabPane.isValid()) {
            final TabbedPaneLayout layout = (TabbedPaneLayout)tabPane.getLayout();
            layout.calculateLayoutInfo();
        }
    }

// TabbedPaneUI methods

    /**
     * Returns the bounds of the specified tab index.  The bounds are
     * with respect to the JTabbedPane's coordinate space.
     */
    public Rectangle getTabBounds(final JTabbedPane pane, final int i) {
        ensureCurrentLayout();
        final Rectangle tabRect = new Rectangle();
        return getTabBounds(i, tabRect);
    }

    public int getTabRunCount(final JTabbedPane pane) {
        ensureCurrentLayout();
        return runCount;
    }

    /**
     * Returns the tab index which intersects the specified point
     * in the JTabbedPane's coordinate space.
     */
    public int tabForCoordinate(final JTabbedPane pane, final int x, final int y) {
        return tabForCoordinate(pane, x, y, true);
    }

    private int tabForCoordinate(final JTabbedPane pane, final int x, final int y, final boolean validateIfNecessary) {
        if (validateIfNecessary) {
            ensureCurrentLayout();
        }
        if (isRunsDirty) {
            // We didn't recalculate the layout, runs and tabCount may not
            // line up, bail.
            return -1;
        }
        final Point p = new Point(x, y);

        if (scrollableTabLayoutEnabled()) {
            translatePointToTabPanel(x, y, p);
            final Rectangle viewRect = tabScroller.viewport.getViewRect();
            if (!viewRect.contains(p)) {
                return -1;
            }
        }
        final int tabCount = tabPane.getTabCount();
        for (int i = 0; i < tabCount; i++) {
            if (rects[i].contains(p.x, p.y)) {
                return i;
            }
        }
        return -1;
    }

    /**
     * Returns the bounds of the specified tab in the coordinate space
     * of the JTabbedPane component.  This is required because the tab rects
     * are by default defined in the coordinate space of the component where
     * they are rendered, which could be the JTabbedPane
     * (for WRAP_TAB_LAYOUT) or a ScrollableTabPanel (SCROLL_TAB_LAYOUT).
     * This method should be used whenever the tab rectangle must be relative
     * to the JTabbedPane itself and the result should be placed in a
     * designated Rectangle object (rather than instantiating and returning
     * a new Rectangle each time). The tab index parameter must be a valid
     * tabbed pane tab index (0 to tab count - 1, inclusive).  The destination
     * rectangle parameter must be a valid {@code Rectangle} instance.
     * The handling of invalid parameters is unspecified.
     *
     * @param tabIndex the index of the tab
     * @param dest the rectangle where the result should be placed
     * @return the resulting rectangle
     *
     * @since 1.4
     */
    protected Rectangle getTabBounds(final int tabIndex, final Rectangle dest) {
        dest.width = rects[tabIndex].width;
        dest.height = rects[tabIndex].height;

        if (scrollableTabLayoutEnabled()) { // SCROLL_TAB_LAYOUT
            // Need to translate coordinates based on viewport location &
            // view position
            final Point vpp = tabScroller.viewport.getLocation();
            final Point viewp = tabScroller.viewport.getViewPosition();
            dest.x = rects[tabIndex].x + vpp.x - viewp.x;
            dest.y = rects[tabIndex].y + vpp.y - viewp.y;

        } else { // WRAP_TAB_LAYOUT
            dest.x = rects[tabIndex].x;
            dest.y = rects[tabIndex].y;
        }
        return dest;
    }

    /**
     * Returns the index of the tab closest to the passed in location, note
     * that the returned tab may not contain the location x,y.
     */
    private int getClosestTab(final int x, final int y) {
        int min = 0;
        final int tabCount = Math.min(rects.length, tabPane.getTabCount());
        int max = tabCount;
        final int tabPlacement = tabPane.getTabPlacement();
        final boolean useX = (tabPlacement == TOP || tabPlacement == BOTTOM);
        final int want = (useX) ? x : y;

        while (min != max) {
            final int current = (max + min) / 2;
            int minLoc;
            int maxLoc;

            if (useX) {
                minLoc = rects[current].x;
                maxLoc = minLoc + rects[current].width;
            } else {
                minLoc = rects[current].y;
                maxLoc = minLoc + rects[current].height;
            }
            if (want < minLoc) {
                max = current;
                if (min == max) {
                    return Math.max(0, current - 1);
                }
            } else if (want >= maxLoc) {
                min = current;
                if (max - min <= 1) {
                    return Math.max(current + 1, tabCount - 1);
                }
            } else {
                return current;
            }
        }
        return min;
    }

    /**
     * Returns a point which is translated from the specified point in the
     * JTabbedPane's coordinate space to the coordinate space of the
     * ScrollableTabPanel.  This is used for SCROLL_TAB_LAYOUT ONLY.
     */
    private Point translatePointToTabPanel(final int srcx, final int srcy, final Point dest) {
        final Point vpp = tabScroller.viewport.getLocation();
        final Point viewp = tabScroller.viewport.getViewPosition();
        dest.x = srcx - vpp.x + viewp.x;
        dest.y = srcy - vpp.y + viewp.y;
        return dest;
    }

// BasicTabbedPaneUI methods

    protected Component getVisibleComponent() {
        return visibleComponent;
    }

    protected void setVisibleComponent(final Component component) {
        if (visibleComponent != null && visibleComponent != component && visibleComponent.getParent() == tabPane && visibleComponent.isVisible()) {

            visibleComponent.setVisible(false);
        }
        if (component != null && !component.isVisible()) {
            component.setVisible(true);
        }
        visibleComponent = component;
    }

    protected void assureRectsCreated(final int tabCount) {
        final int rectArrayLen = rects.length;
        if (tabCount != rectArrayLen) {
            final Rectangle[] tempRectArray = new Rectangle[tabCount];
            System.arraycopy(rects, 0, tempRectArray, 0, Math.min(rectArrayLen, tabCount));
            rects = tempRectArray;
            for (int rectIndex = rectArrayLen; rectIndex < tabCount; rectIndex++) {
                rects[rectIndex] = new Rectangle();
            }
        }

    }

    protected void expandTabRunsArray() {
        final int rectLen = tabRuns.length;
        final int[] newArray = new int[rectLen + 10];
        System.arraycopy(tabRuns, 0, newArray, 0, runCount);
        tabRuns = newArray;
    }

    protected int getRunForTab(final int tabCount, final int tabIndex) {
        for (int i = 0; i < runCount; i++) {
            final int first = tabRuns[i];
            final int last = lastTabInRun(tabCount, i);
            if (tabIndex >= first && tabIndex <= last) {
                return i;
            }
        }
        return 0;
    }

    protected int lastTabInRun(final int tabCount, final int run) {
        if (runCount == 1) {
            return tabCount - 1;
        }
        final int nextRun = (run == runCount - 1 ? 0 : run + 1);
        if (tabRuns[nextRun] == 0) {
            return tabCount - 1;
        }
        return tabRuns[nextRun] - 1;
    }

    protected int getTabRunOverlay(final int tabPlacement) {
        return tabRunOverlay;
    }

    protected int getTabRunIndent(final int tabPlacement, final int run) {
        return 0;
    }

    protected boolean shouldPadTabRun(final int tabPlacement, final int run) {
        return runCount > 1;
    }

    protected boolean shouldRotateTabRuns(final int tabPlacement) {
        return true;
    }

    protected Icon getIconForTab(final int tabIndex) {
        return (!tabPane.isEnabled() || !tabPane.isEnabledAt(tabIndex)) ? tabPane.getDisabledIconAt(tabIndex) : tabPane.getIconAt(tabIndex);
    }

    /**
     * Returns the text View object required to render stylized text (HTML) for
     * the specified tab or null if no specialized text rendering is needed
     * for this tab. This is provided to support html rendering inside tabs.
     *
     * @param tabIndex the index of the tab
     * @return the text view to render the tab's text or null if no
     *         specialized rendering is required
     *
     * @since 1.4
     */
    protected View getTextViewForTab(final int tabIndex) {
        if (htmlViews != null) {
            return htmlViews.elementAt(tabIndex);
        }
        return null;
    }

    protected int calculateTabHeight(final int tabPlacement, final int tabIndex, final int fontHeight) {
        int height = 0;
        final Component c = tabPane.getTabComponentAt(tabIndex);
        if (c != null) {
            height = c.getPreferredSize().height;
        } else {
            final View v = getTextViewForTab(tabIndex);
            if (v != null) {
                // html
                height += (int)v.getPreferredSpan(View.Y_AXIS);
            } else {
                // plain text
                height += fontHeight;
            }
            final Icon icon = getIconForTab(tabIndex);

            if (icon != null) {
                height = Math.max(height, icon.getIconHeight());
            }
        }
        final Insets tabInsets = getTabInsets(tabPlacement, tabIndex);
        height += tabInsets.top + tabInsets.bottom + 2;
        return height;
    }

    protected int calculateMaxTabHeight(final int tabPlacement) {
        final FontMetrics metrics = getFontMetrics();
        final int tabCount = tabPane.getTabCount();
        int result = 0;
        final int fontHeight = metrics.getHeight();
        for (int i = 0; i < tabCount; i++) {
            result = Math.max(calculateTabHeight(tabPlacement, i, fontHeight), result);
        }
        return result;
    }

    protected int calculateTabWidth(final int tabPlacement, final int tabIndex, final FontMetrics metrics) {
        final Insets tabInsets = getTabInsets(tabPlacement, tabIndex);
        int width = tabInsets.left + tabInsets.right + 3;
        final Component tabComponent = tabPane.getTabComponentAt(tabIndex);
        if (tabComponent != null) {
            width += tabComponent.getPreferredSize().width;
        } else {
            final Icon icon = getIconForTab(tabIndex);
            if (icon != null) {
                width += icon.getIconWidth() + textIconGap;
            }
            final View v = getTextViewForTab(tabIndex);
            if (v != null) {
                // html
                width += (int)v.getPreferredSpan(View.X_AXIS);
            } else {
                // plain text
                final String title = tabPane.getTitleAt(tabIndex);
                width += SwingUtilities2.stringWidth(tabPane, metrics, title);
            }
        }
        return width;
    }

    protected int calculateMaxTabWidth(final int tabPlacement) {
        final FontMetrics metrics = getFontMetrics();
        final int tabCount = tabPane.getTabCount();
        int result = 0;
        for (int i = 0; i < tabCount; i++) {
            result = Math.max(calculateTabWidth(tabPlacement, i, metrics), result);
        }
        return result;
    }

    protected int calculateTabAreaHeight(final int tabPlacement, final int horizRunCount, final int maxTabHeight) {
        final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);
        final int tabRunOverlay = getTabRunOverlay(tabPlacement);
        return (horizRunCount > 0 ? horizRunCount * (maxTabHeight - tabRunOverlay) + tabRunOverlay + tabAreaInsets.top + tabAreaInsets.bottom : 0);
    }

    protected int calculateTabAreaWidth(final int tabPlacement, final int vertRunCount, final int maxTabWidth) {
        final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);
        final int tabRunOverlay = getTabRunOverlay(tabPlacement);
        return (vertRunCount > 0 ? vertRunCount * (maxTabWidth - tabRunOverlay) + tabRunOverlay + tabAreaInsets.left + tabAreaInsets.right : 0);
    }

    protected Insets getTabInsets(final int tabPlacement, final int tabIndex) {
        return tabInsets;
    }

    protected Insets getSelectedTabPadInsets(final int tabPlacement) {
        rotateInsets(selectedTabPadInsets, currentPadInsets, tabPlacement);
        return currentPadInsets;
    }

    protected Insets getTabAreaInsets(final int tabPlacement) {
        rotateInsets(tabAreaInsets, currentTabAreaInsets, tabPlacement);
        return currentTabAreaInsets;
    }

    protected Insets getContentBorderInsets(final int tabPlacement) {
        return contentBorderInsets;
    }

    protected FontMetrics getFontMetrics() {
        final Font font = tabPane.getFont();
        return tabPane.getFontMetrics(font);
    }

// Tab Navigation methods

    protected void navigateSelectedTab(final int direction) {
        final int tabPlacement = tabPane.getTabPlacement();
        final int current = DefaultLookup.getBoolean(tabPane, this, "TabbedPane.selectionFollowsFocus", true) ? tabPane.getSelectedIndex() : getFocusIndex();
        final int tabCount = tabPane.getTabCount();
        final boolean leftToRight = AquaUtils.isLeftToRight(tabPane);

        // If we have no tabs then don't navigate.
        if (tabCount <= 0) {
            return;
        }

        int offset;
        switch (tabPlacement) {
            case LEFT:
            case RIGHT:
                switch (direction) {
                    case NEXT:
                        selectNextTab(current);
                        break;
                    case PREVIOUS:
                        selectPreviousTab(current);
                        break;
                    case NORTH:
                        selectPreviousTabInRun(current);
                        break;
                    case SOUTH:
                        selectNextTabInRun(current);
                        break;
                    case WEST:
                        offset = getTabRunOffset(tabPlacement, tabCount, current, false);
                        selectAdjacentRunTab(tabPlacement, current, offset);
                        break;
                    case EAST:
                        offset = getTabRunOffset(tabPlacement, tabCount, current, true);
                        selectAdjacentRunTab(tabPlacement, current, offset);
                        break;
                    default:
                }
                break;
            case BOTTOM:
            case TOP:
            default:
                switch (direction) {
                    case NEXT:
                        selectNextTab(current);
                        break;
                    case PREVIOUS:
                        selectPreviousTab(current);
                        break;
                    case NORTH:
                        offset = getTabRunOffset(tabPlacement, tabCount, current, false);
                        selectAdjacentRunTab(tabPlacement, current, offset);
                        break;
                    case SOUTH:
                        offset = getTabRunOffset(tabPlacement, tabCount, current, true);
                        selectAdjacentRunTab(tabPlacement, current, offset);
                        break;
                    case EAST:
                        if (leftToRight) {
                            selectNextTabInRun(current);
                        } else {
                            selectPreviousTabInRun(current);
                        }
                        break;
                    case WEST:
                        if (leftToRight) {
                            selectPreviousTabInRun(current);
                        } else {
                            selectNextTabInRun(current);
                        }
                        break;
                    default:
                }
        }
    }

    protected void selectNextTabInRun(final int current) {
        final int tabCount = tabPane.getTabCount();
        int tabIndex = getNextTabIndexInRun(tabCount, current);

        while (tabIndex != current && !tabPane.isEnabledAt(tabIndex)) {
            tabIndex = getNextTabIndexInRun(tabCount, tabIndex);
        }
        navigateTo(tabIndex);
    }

    protected void selectPreviousTabInRun(final int current) {
        final int tabCount = tabPane.getTabCount();
        int tabIndex = getPreviousTabIndexInRun(tabCount, current);

        while (tabIndex != current && !tabPane.isEnabledAt(tabIndex)) {
            tabIndex = getPreviousTabIndexInRun(tabCount, tabIndex);
        }
        navigateTo(tabIndex);
    }

    protected void selectNextTab(final int current) {
        int tabIndex = getNextTabIndex(current);

        while (tabIndex != current && !tabPane.isEnabledAt(tabIndex)) {
            tabIndex = getNextTabIndex(tabIndex);
        }
        navigateTo(tabIndex);
    }

    protected void selectPreviousTab(final int current) {
        int tabIndex = getPreviousTabIndex(current);

        while (tabIndex != current && !tabPane.isEnabledAt(tabIndex)) {
            tabIndex = getPreviousTabIndex(tabIndex);
        }
        navigateTo(tabIndex);
    }

    protected void selectAdjacentRunTab(final int tabPlacement, final int tabIndex, final int offset) {
        if (runCount < 2) {
            return;
        }
        int newIndex;
        final Rectangle r = rects[tabIndex];
        switch (tabPlacement) {
            case LEFT:
            case RIGHT:
                newIndex = tabForCoordinate(tabPane, r.x + r.width / 2 + offset, r.y + r.height / 2);
                break;
            case BOTTOM:
            case TOP:
            default:
                newIndex = tabForCoordinate(tabPane, r.x + r.width / 2, r.y + r.height / 2 + offset);
        }
        if (newIndex != -1) {
            while (!tabPane.isEnabledAt(newIndex) && newIndex != tabIndex) {
                newIndex = getNextTabIndex(newIndex);
            }
            navigateTo(newIndex);
        }
    }

    private void navigateTo(final int index) {
        if (DefaultLookup.getBoolean(tabPane, this, "TabbedPane.selectionFollowsFocus", true)) {
            tabPane.setSelectedIndex(index);
        } else {
            // Just move focus (not selection)
            setFocusIndex(index, true);
        }
    }

    void setFocusIndex(final int index, final boolean repaint) {
        if (repaint && !isRunsDirty) {
            repaintTab(focusIndex);
            focusIndex = index;
            repaintTab(focusIndex);
        } else {
            focusIndex = index;
        }
    }

    /**
     * Repaints the specified tab.
     */
    private void repaintTab(final int index) {
        // If we're not valid that means we will shortly be validated and
        // painted, which means we don't have to do anything here.
        if (!isRunsDirty && index >= 0 && index < tabPane.getTabCount()) {
            Rectangle rect = getTabBounds(tabPane, index);
            if (rect != null) {
                tabPane.repaint(rect);
            }
        }
    }

    /**
     * Makes sure the focusIndex is valid.
     */
    private void validateFocusIndex() {
        if (focusIndex >= tabPane.getTabCount()) {
            setFocusIndex(tabPane.getSelectedIndex(), false);
        }
    }

    /**
     * Returns the index of the tab that has focus.
     *
     * @return index of tab that has focus
     * @since 1.5
     */
    protected int getFocusIndex() {
        return focusIndex;
    }

    protected int getTabRunOffset(final int tabPlacement, final int tabCount, final int tabIndex, final boolean forward) {
        final int run = getRunForTab(tabCount, tabIndex);
        int offset;
        switch (tabPlacement) {
            case LEFT: {
                if (run == 0) {
                    offset = (forward ? -(calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth) - maxTabWidth) : -maxTabWidth);

                } else if (run == runCount - 1) {
                    offset = (forward ? maxTabWidth : calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth) - maxTabWidth);
                } else {
                    offset = (forward ? maxTabWidth : -maxTabWidth);
                }
                break;
            }
            case RIGHT: {
                if (run == 0) {
                    offset = (forward ? maxTabWidth : calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth) - maxTabWidth);
                } else if (run == runCount - 1) {
                    offset = (forward ? -(calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth) - maxTabWidth) : -maxTabWidth);
                } else {
                    offset = (forward ? maxTabWidth : -maxTabWidth);
                }
                break;
            }
            case BOTTOM: {
                if (run == 0) {
                    offset = (forward ? maxTabHeight : calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight) - maxTabHeight);
                } else if (run == runCount - 1) {
                    offset = (forward ? -(calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight) - maxTabHeight) : -maxTabHeight);
                } else {
                    offset = (forward ? maxTabHeight : -maxTabHeight);
                }
                break;
            }
            case TOP:
            default: {
                if (run == 0) {
                    offset = (forward ? -(calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight) - maxTabHeight) : -maxTabHeight);
                } else if (run == runCount - 1) {
                    offset = (forward ? maxTabHeight : calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight) - maxTabHeight);
                } else {
                    offset = (forward ? maxTabHeight : -maxTabHeight);
                }
            }
        }
        return offset;
    }

    protected int getPreviousTabIndex(final int base) {
        final int tabIndex = (base - 1 >= 0 ? base - 1 : tabPane.getTabCount() - 1);
        return (tabIndex >= 0 ? tabIndex : 0);
    }

    protected int getNextTabIndex(final int base) {
        return (base + 1) % tabPane.getTabCount();
    }

    protected int getNextTabIndexInRun(final int tabCount, final int base) {
        if (runCount < 2) {
            return getNextTabIndex(base);
        }
        final int currentRun = getRunForTab(tabCount, base);
        final int next = getNextTabIndex(base);
        if (next == tabRuns[getNextTabRun(currentRun)]) {
            return tabRuns[currentRun];
        }
        return next;
    }

    protected int getPreviousTabIndexInRun(final int tabCount, final int base) {
        if (runCount < 2) {
            return getPreviousTabIndex(base);
        }
        final int currentRun = getRunForTab(tabCount, base);
        if (base == tabRuns[currentRun]) {
            final int previous = tabRuns[getNextTabRun(currentRun)] - 1;
            return (previous != -1 ? previous : tabCount - 1);
        }
        return getPreviousTabIndex(base);
    }

    protected int getPreviousTabRun(final int baseRun) {
        final int runIndex = (baseRun - 1 >= 0 ? baseRun - 1 : runCount - 1);
        return (runIndex >= 0 ? runIndex : 0);
    }

    protected int getNextTabRun(final int baseRun) {
        return (baseRun + 1) % runCount;
    }

    protected static void rotateInsets(final Insets topInsets, final Insets targetInsets, final int targetPlacement) {

        switch (targetPlacement) {
            case LEFT:
                targetInsets.top = topInsets.left;
                targetInsets.left = topInsets.top;
                targetInsets.bottom = topInsets.right;
                targetInsets.right = topInsets.bottom;
                break;
            case BOTTOM:
                targetInsets.top = topInsets.bottom;
                targetInsets.left = topInsets.left;
                targetInsets.bottom = topInsets.top;
                targetInsets.right = topInsets.right;
                break;
            case RIGHT:
                targetInsets.top = topInsets.left;
                targetInsets.left = topInsets.bottom;
                targetInsets.bottom = topInsets.right;
                targetInsets.right = topInsets.top;
                break;
            case TOP:
            default:
                targetInsets.top = topInsets.top;
                targetInsets.left = topInsets.left;
                targetInsets.bottom = topInsets.bottom;
                targetInsets.right = topInsets.right;
        }
    }

    // REMIND(aim,7/29/98): This method should be made
    // protected in the next release where
    // API changes are allowed
    boolean requestFocusForVisibleComponent() {
        return SwingUtilities2.tabbedPaneChangeFocusTo(getVisibleComponent());
    }

    private static class Actions extends UIAction {
        static final String NEXT = "navigateNext";
        static final String PREVIOUS = "navigatePrevious";
        static final String RIGHT = "navigateRight";
        static final String LEFT = "navigateLeft";
        static final String UP = "navigateUp";
        static final String DOWN = "navigateDown";
        static final String PAGE_UP = "navigatePageUp";
        static final String PAGE_DOWN = "navigatePageDown";
        static final String REQUEST_FOCUS = "requestFocus";
        static final String REQUEST_FOCUS_FOR_VISIBLE = "requestFocusForVisibleComponent";
        static final String SET_SELECTED = "setSelectedIndex";
        static final String SELECT_FOCUSED = "selectTabWithFocus";
        static final String SCROLL_FORWARD = "scrollTabsForwardAction";
        static final String SCROLL_BACKWARD = "scrollTabsBackwardAction";

        Actions(final String key) {
            super(key);
        }

        static Object getUIOfType(final ComponentUI ui, final Class<AquaTabbedPaneCopyFromBasicUI> klass) {
            if (klass.isInstance(ui)) {
                return ui;
            }
            return null;
        }

        public void actionPerformed(final ActionEvent e) {
            final String key = getName();
            final JTabbedPane pane = (JTabbedPane)e.getSource();
            final AquaTabbedPaneCopyFromBasicUI ui = (AquaTabbedPaneCopyFromBasicUI)getUIOfType(pane.getUI(), AquaTabbedPaneCopyFromBasicUI.class);

            if (ui == null) {
                return;
            }

            if (key == NEXT) {
                ui.navigateSelectedTab(SwingConstants.NEXT);
            } else if (key == PREVIOUS) {
                ui.navigateSelectedTab(SwingConstants.PREVIOUS);
            } else if (key == RIGHT) {
                ui.navigateSelectedTab(SwingConstants.EAST);
            } else if (key == LEFT) {
                ui.navigateSelectedTab(SwingConstants.WEST);
            } else if (key == UP) {
                ui.navigateSelectedTab(SwingConstants.NORTH);
            } else if (key == DOWN) {
                ui.navigateSelectedTab(SwingConstants.SOUTH);
            } else if (key == PAGE_UP) {
                final int tabPlacement = pane.getTabPlacement();
                if (tabPlacement == TOP || tabPlacement == BOTTOM) {
                    ui.navigateSelectedTab(SwingConstants.WEST);
                } else {
                    ui.navigateSelectedTab(SwingConstants.NORTH);
                }
            } else if (key == PAGE_DOWN) {
                final int tabPlacement = pane.getTabPlacement();
                if (tabPlacement == TOP || tabPlacement == BOTTOM) {
                    ui.navigateSelectedTab(SwingConstants.EAST);
                } else {
                    ui.navigateSelectedTab(SwingConstants.SOUTH);
                }
            } else if (key == REQUEST_FOCUS) {
                pane.requestFocus();
            } else if (key == REQUEST_FOCUS_FOR_VISIBLE) {
                ui.requestFocusForVisibleComponent();
            } else if (key == SET_SELECTED) {
                final String command = e.getActionCommand();

                if (command != null && command.length() > 0) {
                    int mnemonic = e.getActionCommand().charAt(0);
                    if (mnemonic >= 'a' && mnemonic <= 'z') {
                        mnemonic -= ('a' - 'A');
                    }
                    final Integer index = ui.mnemonicToIndexMap.get(Integer.valueOf(mnemonic));
                    if (index != null && pane.isEnabledAt(index.intValue())) {
                        pane.setSelectedIndex(index.intValue());
                    }
                }
            } else if (key == SELECT_FOCUSED) {
                final int focusIndex = ui.getFocusIndex();
                if (focusIndex != -1) {
                    pane.setSelectedIndex(focusIndex);
                }
            } else if (key == SCROLL_FORWARD) {
                if (ui.scrollableTabLayoutEnabled()) {
                    ui.tabScroller.scrollForward(pane.getTabPlacement());
                }
            } else if (key == SCROLL_BACKWARD) {
                if (ui.scrollableTabLayoutEnabled()) {
                    ui.tabScroller.scrollBackward(pane.getTabPlacement());
                }
            }
        }
    }

    /**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTabbedPaneUI.
     */
    public class TabbedPaneLayout implements LayoutManager {
        // MACOSX adding accessor for superclass
        protected Container getTabContainer() {
            return tabContainer;
        }
        // END MACOSX

        public void addLayoutComponent(final String name, final Component comp) {}

        public void removeLayoutComponent(final Component comp) {}

        public Dimension preferredLayoutSize(final Container parent) {
            return calculateSize(false);
        }

        public Dimension minimumLayoutSize(final Container parent) {
            return calculateSize(true);
        }

        protected Dimension calculateSize(final boolean minimum) {
            final int tabPlacement = tabPane.getTabPlacement();
            final Insets insets = tabPane.getInsets();
            final Insets contentInsets = getContentBorderInsets(tabPlacement);
            final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);

            final Dimension zeroSize = new Dimension(0, 0);
            int height = 0;
            int width = 0;
            int cWidth = 0;
            int cHeight = 0;

            // Determine minimum size required to display largest
            // child in each dimension
            //
            for (int i = 0; i < tabPane.getTabCount(); i++) {
                final Component component = tabPane.getComponentAt(i);
                if (component != null) {
                    Dimension size = zeroSize;
                    size = minimum ? component.getMinimumSize() : component.getPreferredSize();

                    if (size != null) {
                        cHeight = Math.max(size.height, cHeight);
                        cWidth = Math.max(size.width, cWidth);
                    }
                }
            }
            // Add content border insets to minimum size
            width += cWidth;
            height += cHeight;
            int tabExtent = 0;

            // Calculate how much space the tabs will need, based on the
            // minimum size required to display largest child + content border
            //
            switch (tabPlacement) {
                case LEFT:
                case RIGHT:
                    height = Math.max(height, calculateMaxTabHeight(tabPlacement));
                    tabExtent = preferredTabAreaWidth(tabPlacement, height - tabAreaInsets.top - tabAreaInsets.bottom);
                    width += tabExtent;
                    break;
                case TOP:
                case BOTTOM:
                default:
                    width = Math.max(width, calculateMaxTabWidth(tabPlacement));
                    tabExtent = preferredTabAreaHeight(tabPlacement, width - tabAreaInsets.left - tabAreaInsets.right);
                    height += tabExtent;
            }
            return new Dimension(width + insets.left + insets.right + contentInsets.left + contentInsets.right, height + insets.bottom + insets.top + contentInsets.top + contentInsets.bottom);

        }

        protected int preferredTabAreaHeight(final int tabPlacement, final int width) {
            final int tabCount = tabPane.getTabCount();
            int total = 0;
            if (tabCount > 0) {
                final int maxTabHeight = calculateMaxTabHeight(tabPlacement);
                total = calculateTabAreaHeight(tabPlacement, 1, maxTabHeight);
            }
            return total;
        }

        protected int preferredTabAreaWidth(final int tabPlacement, final int height) {
            final int tabCount = tabPane.getTabCount();
            int total = 0;
            if (tabCount > 0) {
                maxTabWidth = calculateMaxTabWidth(tabPlacement);
                total = calculateTabAreaWidth(tabPlacement, 1, maxTabWidth);
            }
            return total;
        }

        @SuppressWarnings("deprecation")
        public void layoutContainer(final Container parent) {
            /* Some of the code in this method deals with changing the
             * visibility of components to hide and show the contents for the
             * selected tab. This is older code that has since been duplicated
             * in JTabbedPane.fireStateChanged(), so as to allow visibility
             * changes to happen sooner (see the note there). This code remains
             * for backward compatibility as there are some cases, such as
             * subclasses that don't fireStateChanged() where it may be used.
             * Any changes here need to be kept in synch with
             * JTabbedPane.fireStateChanged().
             */

            setRolloverTab(-1);

            final int tabPlacement = tabPane.getTabPlacement();
            final Insets insets = tabPane.getInsets();
            final int selectedIndex = tabPane.getSelectedIndex();
            final Component visibleComponent = getVisibleComponent();

            calculateLayoutInfo();

            Component selectedComponent = null;
            if (selectedIndex < 0) {
                if (visibleComponent != null) {
                    // The last tab was removed, so remove the component
                    setVisibleComponent(null);
                }
            } else {
                selectedComponent = tabPane.getComponentAt(selectedIndex);
            }
            int cx, cy, cw, ch;
            int totalTabWidth = 0;
            int totalTabHeight = 0;
            final Insets contentInsets = getContentBorderInsets(tabPlacement);

            boolean shouldChangeFocus = false;

            // In order to allow programs to use a single component
            // as the display for multiple tabs, we will not change
            // the visible compnent if the currently selected tab
            // has a null component.  This is a bit dicey, as we don't
            // explicitly state we support this in the spec, but since
            // programs are now depending on this, we're making it work.
            //
            if (selectedComponent != null) {
                if (selectedComponent != visibleComponent && visibleComponent != null) {
                    if (SwingUtilities.findFocusOwner(visibleComponent) != null) {
                        shouldChangeFocus = true;
                    }
                }
                setVisibleComponent(selectedComponent);
            }

            final Rectangle bounds = tabPane.getBounds();
            final int numChildren = tabPane.getComponentCount();

            if (numChildren > 0) {

                switch (tabPlacement) {
                    case LEFT:
                        totalTabWidth = calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                        cx = insets.left + totalTabWidth + contentInsets.left;
                        cy = insets.top + contentInsets.top;
                        break;
                    case RIGHT:
                        totalTabWidth = calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                        cx = insets.left + contentInsets.left;
                        cy = insets.top + contentInsets.top;
                        break;
                    case BOTTOM:
                        totalTabHeight = calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                        cx = insets.left + contentInsets.left;
                        cy = insets.top + contentInsets.top;
                        break;
                    case TOP:
                    default:
                        totalTabHeight = calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                        cx = insets.left + contentInsets.left;
                        cy = insets.top + totalTabHeight + contentInsets.top;
                }

                cw = bounds.width - totalTabWidth - insets.left - insets.right - contentInsets.left - contentInsets.right;
                ch = bounds.height - totalTabHeight - insets.top - insets.bottom - contentInsets.top - contentInsets.bottom;

                for (int i = 0; i < numChildren; i++) {
                    final Component child = tabPane.getComponent(i);
                    if (child == tabContainer) {

                        final int tabContainerWidth = totalTabWidth == 0 ? bounds.width : totalTabWidth + insets.left + insets.right + contentInsets.left + contentInsets.right;
                        final int tabContainerHeight = totalTabHeight == 0 ? bounds.height : totalTabHeight + insets.top + insets.bottom + contentInsets.top + contentInsets.bottom;

                        int tabContainerX = 0;
                        int tabContainerY = 0;
                        if (tabPlacement == BOTTOM) {
                            tabContainerY = bounds.height - tabContainerHeight;
                        } else if (tabPlacement == RIGHT) {
                            tabContainerX = bounds.width - tabContainerWidth;
                        }
                        child.setBounds(tabContainerX, tabContainerY, tabContainerWidth, tabContainerHeight);
                    } else {
                        child.setBounds(cx, cy, cw, ch);
                    }
                }
            }
            layoutTabComponents();
            if (shouldChangeFocus) {
                if (!requestFocusForVisibleComponent()) {
                    tabPane.requestFocus();
                }
            }
        }

        public void calculateLayoutInfo() {
            final int tabCount = tabPane.getTabCount();
            assureRectsCreated(tabCount);
            calculateTabRects(tabPane.getTabPlacement(), tabCount);
            isRunsDirty = false;
        }

        protected void layoutTabComponents() {
            if (tabContainer == null) {
                return;
            }
            final Rectangle rect = new Rectangle();
            final Point delta = new Point(-tabContainer.getX(), -tabContainer.getY());
            if (scrollableTabLayoutEnabled()) {
                translatePointToTabPanel(0, 0, delta);
            }
            for (int i = 0; i < tabPane.getTabCount(); i++) {
                final Component c = tabPane.getTabComponentAt(i);
                if (c == null) {
                    continue;
                }
                getTabBounds(i, rect);
                final Dimension preferredSize = c.getPreferredSize();
                final Insets insets = getTabInsets(tabPane.getTabPlacement(), i);
                final int outerX = rect.x + insets.left + delta.x;
                final int outerY = rect.y + insets.top + delta.y;
                final int outerWidth = rect.width - insets.left - insets.right;
                final int outerHeight = rect.height - insets.top - insets.bottom;
                // centralize component
                final int x = outerX + (outerWidth - preferredSize.width) / 2;
                final int y = outerY + (outerHeight - preferredSize.height) / 2;
                final int tabPlacement = tabPane.getTabPlacement();
                final boolean isSeleceted = i == tabPane.getSelectedIndex();
                c.setBounds(x + getTabLabelShiftX(tabPlacement, i, isSeleceted), y + getTabLabelShiftY(tabPlacement, i, isSeleceted), preferredSize.width, preferredSize.height);
            }
        }

        protected void calculateTabRects(final int tabPlacement, final int tabCount) {
            final FontMetrics metrics = getFontMetrics();
            final Dimension size = tabPane.getSize();
            final Insets insets = tabPane.getInsets();
            final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);
            final int fontHeight = metrics.getHeight();
            final int selectedIndex = tabPane.getSelectedIndex();
            int tabRunOverlay;
            int i, j;
            int x, y;
            int returnAt;
            boolean verticalTabRuns = (tabPlacement == LEFT || tabPlacement == RIGHT);
            boolean leftToRight = AquaUtils.isLeftToRight(tabPane);

            //
            // Calculate bounds within which a tab run must fit
            //
            switch (tabPlacement) {
                case LEFT:
                    maxTabWidth = calculateMaxTabWidth(tabPlacement);
                    x = insets.left + tabAreaInsets.left;
                    y = insets.top + tabAreaInsets.top;
                    returnAt = size.height - (insets.bottom + tabAreaInsets.bottom);
                    break;
                case RIGHT:
                    maxTabWidth = calculateMaxTabWidth(tabPlacement);
                    x = size.width - insets.right - tabAreaInsets.right - maxTabWidth;
                    y = insets.top + tabAreaInsets.top;
                    returnAt = size.height - (insets.bottom + tabAreaInsets.bottom);
                    break;
                case BOTTOM:
                    maxTabHeight = calculateMaxTabHeight(tabPlacement);
                    x = insets.left + tabAreaInsets.left;
                    y = size.height - insets.bottom - tabAreaInsets.bottom - maxTabHeight;
                    returnAt = size.width - (insets.right + tabAreaInsets.right);
                    break;
                case TOP:
                default:
                    maxTabHeight = calculateMaxTabHeight(tabPlacement);
                    x = insets.left + tabAreaInsets.left;
                    y = insets.top + tabAreaInsets.top;
                    returnAt = size.width - (insets.right + tabAreaInsets.right);
                    break;
            }

            tabRunOverlay = getTabRunOverlay(tabPlacement);

            runCount = 0;
            selectedRun = -1;

            if (tabCount == 0) {
                return;
            }

            // Run through tabs and partition them into runs
            Rectangle rect;
            for (i = 0; i < tabCount; i++) {
                rect = rects[i];

                if (!verticalTabRuns) {
                    // Tabs on TOP or BOTTOM....
                    if (i > 0) {
                        rect.x = rects[i - 1].x + rects[i - 1].width;
                    } else {
                        tabRuns[0] = 0;
                        runCount = 1;
                        maxTabWidth = 0;
                        rect.x = x;
                    }
                    rect.width = calculateTabWidth(tabPlacement, i, metrics);
                    maxTabWidth = Math.max(maxTabWidth, rect.width);

                    // Never move a TAB down a run if it is in the first column.
                    // Even if there isn't enough room, moving it to a fresh
                    // line won't help.
                    if (rect.x != 2 + insets.left && rect.x + rect.width > returnAt) {
                        if (runCount > tabRuns.length - 1) {
                            expandTabRunsArray();
                        }
                        tabRuns[runCount] = i;
                        runCount++;
                        rect.x = x;
                    }
                    // Initialize y position in case there's just one run
                    rect.y = y;
                    rect.height = maxTabHeight/* - 2*/;

                } else {
                    // Tabs on LEFT or RIGHT...
                    if (i > 0) {
                        rect.y = rects[i - 1].y + rects[i - 1].height;
                    } else {
                        tabRuns[0] = 0;
                        runCount = 1;
                        maxTabHeight = 0;
                        rect.y = y;
                    }
                    rect.height = calculateTabHeight(tabPlacement, i, fontHeight);
                    maxTabHeight = Math.max(maxTabHeight, rect.height);

                    // Never move a TAB over a run if it is in the first run.
                    // Even if there isn't enough room, moving it to a fresh
                    // column won't help.
                    if (rect.y != 2 + insets.top && rect.y + rect.height > returnAt) {
                        if (runCount > tabRuns.length - 1) {
                            expandTabRunsArray();
                        }
                        tabRuns[runCount] = i;
                        runCount++;
                        rect.y = y;
                    }
                    // Initialize x position in case there's just one column
                    rect.x = x;
                    rect.width = maxTabWidth/* - 2*/;

                }
                if (i == selectedIndex) {
                    selectedRun = runCount - 1;
                }
            }

            if (runCount > 1) {
                // Re-distribute tabs in case last run has leftover space
                normalizeTabRuns(tabPlacement, tabCount, verticalTabRuns ? y : x, returnAt);

                selectedRun = getRunForTab(tabCount, selectedIndex);

                // Rotate run array so that selected run is first
                if (shouldRotateTabRuns(tabPlacement)) {
                    rotateTabRuns(tabPlacement, selectedRun);
                }
            }

            // Step through runs from back to front to calculate
            // tab y locations and to pad runs appropriately
            for (i = runCount - 1; i >= 0; i--) {
                final int start = tabRuns[i];
                final int next = tabRuns[i == (runCount - 1) ? 0 : i + 1];
                final int end = (next != 0 ? next - 1 : tabCount - 1);
                if (!verticalTabRuns) {
                    for (j = start; j <= end; j++) {
                        rect = rects[j];
                        rect.y = y;
                        rect.x += getTabRunIndent(tabPlacement, i);
                    }
                    if (shouldPadTabRun(tabPlacement, i)) {
                        padTabRun(tabPlacement, start, end, returnAt);
                    }
                    if (tabPlacement == BOTTOM) {
                        y -= (maxTabHeight - tabRunOverlay);
                    } else {
                        y += (maxTabHeight - tabRunOverlay);
                    }
                } else {
                    for (j = start; j <= end; j++) {
                        rect = rects[j];
                        rect.x = x;
                        rect.y += getTabRunIndent(tabPlacement, i);
                    }
                    if (shouldPadTabRun(tabPlacement, i)) {
                        padTabRun(tabPlacement, start, end, returnAt);
                    }
                    if (tabPlacement == RIGHT) {
                        x -= (maxTabWidth - tabRunOverlay);
                    } else {
                        x += (maxTabWidth - tabRunOverlay);
                    }
                }
            }

            // Pad the selected tab so that it appears raised in front
            padSelectedTab(tabPlacement, selectedIndex);

            // if right to left and tab placement on the top or
            // the bottom, flip x positions and adjust by widths
            if (!leftToRight && !verticalTabRuns) {
                final int rightMargin = size.width - (insets.right + tabAreaInsets.right);
                for (i = 0; i < tabCount; i++) {
                    rects[i].x = rightMargin - rects[i].x - rects[i].width;
                }
            }
        }

        /*
         * Rotates the run-index array so that the selected run is run[0]
         */
        protected void rotateTabRuns(final int tabPlacement, final int selectedRun) {
            for (int i = 0; i < selectedRun; i++) {
                final int save = tabRuns[0];
                for (int j = 1; j < runCount; j++) {
                    tabRuns[j - 1] = tabRuns[j];
                }
                tabRuns[runCount - 1] = save;
            }
        }

        protected void normalizeTabRuns(final int tabPlacement, final int tabCount, final int start, final int max) {
            boolean verticalTabRuns = (tabPlacement == LEFT || tabPlacement == RIGHT);
            int run = runCount - 1;
            boolean keepAdjusting = true;
            double weight = 1.25;

            // At this point the tab runs are packed to fit as many
            // tabs as possible, which can leave the last run with a lot
            // of extra space (resulting in very fat tabs on the last run).
            // So we'll attempt to distribute this extra space more evenly
            // across the runs in order to make the runs look more consistent.
            //
            // Starting with the last run, determine whether the last tab in
            // the previous run would fit (generously) in this run; if so,
            // move tab to current run and shift tabs accordingly.  Cycle
            // through remaining runs using the same algorithm.
            //
            while (keepAdjusting) {
                final int last = lastTabInRun(tabCount, run);
                final int prevLast = lastTabInRun(tabCount, run - 1);
                int end;
                int prevLastLen;

                if (!verticalTabRuns) {
                    end = rects[last].x + rects[last].width;
                    prevLastLen = (int)(maxTabWidth * weight);
                } else {
                    end = rects[last].y + rects[last].height;
                    prevLastLen = (int)(maxTabHeight * weight * 2);
                }

                // Check if the run has enough extra space to fit the last tab
                // from the previous row...
                if (max - end > prevLastLen) {

                    // Insert tab from previous row and shift rest over
                    tabRuns[run] = prevLast;
                    if (!verticalTabRuns) {
                        rects[prevLast].x = start;
                    } else {
                        rects[prevLast].y = start;
                    }
                    for (int i = prevLast + 1; i <= last; i++) {
                        if (!verticalTabRuns) {
                            rects[i].x = rects[i - 1].x + rects[i - 1].width;
                        } else {
                            rects[i].y = rects[i - 1].y + rects[i - 1].height;
                        }
                    }

                } else if (run == runCount - 1) {
                    // no more room left in last run, so we're done!
                    keepAdjusting = false;
                }
                if (run - 1 > 0) {
                    // check previous run next...
                    run -= 1;
                } else {
                    // check last run again...but require a higher ratio
                    // of extraspace-to-tabsize because we don't want to
                    // end up with too many tabs on the last run!
                    run = runCount - 1;
                    weight += .25;
                }
            }
        }

        protected void padTabRun(final int tabPlacement, final int start, final int end, final int max) {
            final Rectangle lastRect = rects[end];
            if (tabPlacement == TOP || tabPlacement == BOTTOM) {
                final int runWidth = (lastRect.x + lastRect.width) - rects[start].x;
                final int deltaWidth = max - (lastRect.x + lastRect.width);
                final float factor = (float)deltaWidth / (float)runWidth;

                for (int j = start; j <= end; j++) {
                    final Rectangle pastRect = rects[j];
                    if (j > start) {
                        pastRect.x = rects[j - 1].x + rects[j - 1].width;
                    }
                    pastRect.width += Math.round(pastRect.width * factor);
                }
                lastRect.width = max - lastRect.x;
            } else {
                final int runHeight = (lastRect.y + lastRect.height) - rects[start].y;
                final int deltaHeight = max - (lastRect.y + lastRect.height);
                final float factor = (float)deltaHeight / (float)runHeight;

                for (int j = start; j <= end; j++) {
                    final Rectangle pastRect = rects[j];
                    if (j > start) {
                        pastRect.y = rects[j - 1].y + rects[j - 1].height;
                    }
                    pastRect.height += Math.round(pastRect.height * factor);
                }
                lastRect.height = max - lastRect.y;
            }
        }

        protected void padSelectedTab(final int tabPlacement, final int selectedIndex) {

            if (selectedIndex >= 0) {
                final Rectangle selRect = rects[selectedIndex];
                final Insets padInsets = getSelectedTabPadInsets(tabPlacement);
                selRect.x -= padInsets.left;
                selRect.width += (padInsets.left + padInsets.right);
                selRect.y -= padInsets.top;
                selRect.height += (padInsets.top + padInsets.bottom);

                if (!scrollableTabLayoutEnabled()) { // WRAP_TAB_LAYOUT
                    // do not expand selected tab more then necessary
                    final Dimension size = tabPane.getSize();
                    final Insets insets = tabPane.getInsets();

                    if ((tabPlacement == LEFT) || (tabPlacement == RIGHT)) {
                        final int top = insets.top - selRect.y;
                        if (top > 0) {
                            selRect.y += top;
                            selRect.height -= top;
                        }
                        final int bottom = (selRect.y + selRect.height) + insets.bottom - size.height;
                        if (bottom > 0) {
                            selRect.height -= bottom;
                        }
                    } else {
                        final int left = insets.left - selRect.x;
                        if (left > 0) {
                            selRect.x += left;
                            selRect.width -= left;
                        }
                        final int right = (selRect.x + selRect.width) + insets.right - size.width;
                        if (right > 0) {
                            selRect.width -= right;
                        }
                    }
                }
            }
        }
    }

    class TabbedPaneScrollLayout extends TabbedPaneLayout {

        protected int preferredTabAreaHeight(final int tabPlacement, final int width) {
            return calculateMaxTabHeight(tabPlacement);
        }

        protected int preferredTabAreaWidth(final int tabPlacement, final int height) {
            return calculateMaxTabWidth(tabPlacement);
        }

        @SuppressWarnings("deprecation")
        public void layoutContainer(final Container parent) {
            /* Some of the code in this method deals with changing the
             * visibility of components to hide and show the contents for the
             * selected tab. This is older code that has since been duplicated
             * in JTabbedPane.fireStateChanged(), so as to allow visibility
             * changes to happen sooner (see the note there). This code remains
             * for backward compatibility as there are some cases, such as
             * subclasses that don't fireStateChanged() where it may be used.
             * Any changes here need to be kept in synch with
             * JTabbedPane.fireStateChanged().
             */

            setRolloverTab(-1);

            final int tabPlacement = tabPane.getTabPlacement();
            final int tabCount = tabPane.getTabCount();
            final Insets insets = tabPane.getInsets();
            final int selectedIndex = tabPane.getSelectedIndex();
            final Component visibleComponent = getVisibleComponent();

            calculateLayoutInfo();

            Component selectedComponent = null;
            if (selectedIndex < 0) {
                if (visibleComponent != null) {
                    // The last tab was removed, so remove the component
                    setVisibleComponent(null);
                }
            } else {
                selectedComponent = tabPane.getComponentAt(selectedIndex);
            }

            if (tabPane.getTabCount() == 0) {
                tabScroller.croppedEdge.resetParams();
                tabScroller.scrollForwardButton.setVisible(false);
                tabScroller.scrollBackwardButton.setVisible(false);
                return;
            }

            boolean shouldChangeFocus = false;

            // In order to allow programs to use a single component
            // as the display for multiple tabs, we will not change
            // the visible compnent if the currently selected tab
            // has a null component.  This is a bit dicey, as we don't
            // explicitly state we support this in the spec, but since
            // programs are now depending on this, we're making it work.
            //
            if (selectedComponent != null) {
                if (selectedComponent != visibleComponent && visibleComponent != null) {
                    if (SwingUtilities.findFocusOwner(visibleComponent) != null) {
                        shouldChangeFocus = true;
                    }
                }
                setVisibleComponent(selectedComponent);
            }
            int tx, ty, tw, th; // tab area bounds
            int cx, cy, cw, ch; // content area bounds
            final Insets contentInsets = getContentBorderInsets(tabPlacement);
            final Rectangle bounds = tabPane.getBounds();
            final int numChildren = tabPane.getComponentCount();

            if (numChildren > 0) {
                switch (tabPlacement) {
                    case LEFT:
                        // calculate tab area bounds
                        tw = calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                        th = bounds.height - insets.top - insets.bottom;
                        tx = insets.left;
                        ty = insets.top;

                        // calculate content area bounds
                        cx = tx + tw + contentInsets.left;
                        cy = ty + contentInsets.top;
                        cw = bounds.width - insets.left - insets.right - tw - contentInsets.left - contentInsets.right;
                        ch = bounds.height - insets.top - insets.bottom - contentInsets.top - contentInsets.bottom;
                        break;
                    case RIGHT:
                        // calculate tab area bounds
                        tw = calculateTabAreaWidth(tabPlacement, runCount, maxTabWidth);
                        th = bounds.height - insets.top - insets.bottom;
                        tx = bounds.width - insets.right - tw;
                        ty = insets.top;

                        // calculate content area bounds
                        cx = insets.left + contentInsets.left;
                        cy = insets.top + contentInsets.top;
                        cw = bounds.width - insets.left - insets.right - tw - contentInsets.left - contentInsets.right;
                        ch = bounds.height - insets.top - insets.bottom - contentInsets.top - contentInsets.bottom;
                        break;
                    case BOTTOM:
                        // calculate tab area bounds
                        tw = bounds.width - insets.left - insets.right;
                        th = calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                        tx = insets.left;
                        ty = bounds.height - insets.bottom - th;

                        // calculate content area bounds
                        cx = insets.left + contentInsets.left;
                        cy = insets.top + contentInsets.top;
                        cw = bounds.width - insets.left - insets.right - contentInsets.left - contentInsets.right;
                        ch = bounds.height - insets.top - insets.bottom - th - contentInsets.top - contentInsets.bottom;
                        break;
                    case TOP:
                    default:
                        // calculate tab area bounds
                        tw = bounds.width - insets.left - insets.right;
                        th = calculateTabAreaHeight(tabPlacement, runCount, maxTabHeight);
                        tx = insets.left;
                        ty = insets.top;

                        // calculate content area bounds
                        cx = tx + contentInsets.left;
                        cy = ty + th + contentInsets.top;
                        cw = bounds.width - insets.left - insets.right - contentInsets.left - contentInsets.right;
                        ch = bounds.height - insets.top - insets.bottom - th - contentInsets.top - contentInsets.bottom;
                }

                for (int i = 0; i < numChildren; i++) {
                    final Component child = tabPane.getComponent(i);

                    if (tabScroller != null && child == tabScroller.viewport) {
                        final JViewport viewport = (JViewport)child;
                        final Rectangle viewRect = viewport.getViewRect();
                        int vw = tw;
                        int vh = th;
                        final Dimension butSize = tabScroller.scrollForwardButton.getPreferredSize();
                        switch (tabPlacement) {
                            case LEFT:
                            case RIGHT:
                                final int totalTabHeight = rects[tabCount - 1].y + rects[tabCount - 1].height;
                                if (totalTabHeight > th) {
                                    // Allow space for scrollbuttons
                                    vh = (th > 2 * butSize.height) ? th - 2 * butSize.height : 0;
                                    if (totalTabHeight - viewRect.y <= vh) {
                                        // Scrolled to the end, so ensure the viewport size is
                                        // such that the scroll offset aligns with a tab
                                        vh = totalTabHeight - viewRect.y;
                                    }
                                }
                                break;
                            case BOTTOM:
                            case TOP:
                            default:
                                final int totalTabWidth = rects[tabCount - 1].x + rects[tabCount - 1].width;
                                if (totalTabWidth > tw) {
                                    // Need to allow space for scrollbuttons
                                    vw = (tw > 2 * butSize.width) ? tw - 2 * butSize.width : 0;
                                    if (totalTabWidth - viewRect.x <= vw) {
                                        // Scrolled to the end, so ensure the viewport size is
                                        // such that the scroll offset aligns with a tab
                                        vw = totalTabWidth - viewRect.x;
                                    }
                                }
                        }
                        child.setBounds(tx, ty, vw, vh);

                    } else if (tabScroller != null && (child == tabScroller.scrollForwardButton || child == tabScroller.scrollBackwardButton)) {
                        final Component scrollbutton = child;
                        final Dimension bsize = scrollbutton.getPreferredSize();
                        int bx = 0;
                        int by = 0;
                        final int bw = bsize.width;
                        final int bh = bsize.height;
                        boolean visible = false;

                        switch (tabPlacement) {
                            case LEFT:
                            case RIGHT:
                                final int totalTabHeight = rects[tabCount - 1].y + rects[tabCount - 1].height;
                                if (totalTabHeight > th) {
                                    visible = true;
                                    bx = (tabPlacement == LEFT ? tx + tw - bsize.width : tx);
                                    by = (child == tabScroller.scrollForwardButton) ? bounds.height - insets.bottom - bsize.height : bounds.height - insets.bottom - 2 * bsize.height;
                                }
                                break;

                            case BOTTOM:
                            case TOP:
                            default:
                                final int totalTabWidth = rects[tabCount - 1].x + rects[tabCount - 1].width;

                                if (totalTabWidth > tw) {
                                    visible = true;
                                    bx = (child == tabScroller.scrollForwardButton) ? bounds.width - insets.left - bsize.width : bounds.width - insets.left - 2 * bsize.width;
                                    by = (tabPlacement == TOP ? ty + th - bsize.height : ty);
                                }
                        }
                        child.setVisible(visible);
                        if (visible) {
                            child.setBounds(bx, by, bw, bh);
                        }

                    } else {
                        // All content children...
                        child.setBounds(cx, cy, cw, ch);
                    }
                }
                super.layoutTabComponents();
                layoutCroppedEdge();
                if (shouldChangeFocus) {
                    if (!requestFocusForVisibleComponent()) {
                        tabPane.requestFocus();
                    }
                }
            }
        }

        private void layoutCroppedEdge() {
            tabScroller.croppedEdge.resetParams();
            final Rectangle viewRect = tabScroller.viewport.getViewRect();
            int cropline;
            for (int i = 0; i < rects.length; i++) {
                final Rectangle tabRect = rects[i];
                switch (tabPane.getTabPlacement()) {
                    case LEFT:
                    case RIGHT:
                        cropline = viewRect.y + viewRect.height;
                        if ((tabRect.y < cropline) && (tabRect.y + tabRect.height > cropline)) {
                            tabScroller.croppedEdge.setParams(i, cropline - tabRect.y - 1, -currentTabAreaInsets.left, 0);
                        }
                        break;
                    case TOP:
                    case BOTTOM:
                    default:
                        cropline = viewRect.x + viewRect.width;
                        if ((tabRect.x < cropline - 1) && (tabRect.x + tabRect.width > cropline)) {
                            tabScroller.croppedEdge.setParams(i, cropline - tabRect.x - 1, 0, -currentTabAreaInsets.top);
                        }
                }
            }
        }

        protected void calculateTabRects(final int tabPlacement, final int tabCount) {
            final FontMetrics metrics = getFontMetrics();
            final Dimension size = tabPane.getSize();
            final Insets insets = tabPane.getInsets();
            final Insets tabAreaInsets = getTabAreaInsets(tabPlacement);
            final int fontHeight = metrics.getHeight();
            final int selectedIndex = tabPane.getSelectedIndex();
            int i;
            boolean verticalTabRuns = (tabPlacement == LEFT || tabPlacement == RIGHT);
            boolean leftToRight = AquaUtils.isLeftToRight(tabPane);
            final int x = tabAreaInsets.left;
            final int y = tabAreaInsets.top;
            int totalWidth = 0;
            int totalHeight = 0;

            //
            // Calculate bounds within which a tab run must fit
            //
            switch (tabPlacement) {
                case LEFT:
                case RIGHT:
                    maxTabWidth = calculateMaxTabWidth(tabPlacement);
                    break;
                case BOTTOM:
                case TOP:
                default:
                    maxTabHeight = calculateMaxTabHeight(tabPlacement);
            }

            runCount = 0;
            selectedRun = -1;

            if (tabCount == 0) {
                return;
            }

            selectedRun = 0;
            runCount = 1;

            // Run through tabs and lay them out in a single run
            Rectangle rect;
            for (i = 0; i < tabCount; i++) {
                rect = rects[i];

                if (!verticalTabRuns) {
                    // Tabs on TOP or BOTTOM....
                    if (i > 0) {
                        rect.x = rects[i - 1].x + rects[i - 1].width;
                    } else {
                        tabRuns[0] = 0;
                        maxTabWidth = 0;
                        totalHeight += maxTabHeight;
                        rect.x = x;
                    }
                    rect.width = calculateTabWidth(tabPlacement, i, metrics);
                    totalWidth = rect.x + rect.width;
                    maxTabWidth = Math.max(maxTabWidth, rect.width);

                    rect.y = y;
                    rect.height = maxTabHeight/* - 2*/;

                } else {
                    // Tabs on LEFT or RIGHT...
                    if (i > 0) {
                        rect.y = rects[i - 1].y + rects[i - 1].height;
                    } else {
                        tabRuns[0] = 0;
                        maxTabHeight = 0;
                        totalWidth = maxTabWidth;
                        rect.y = y;
                    }
                    rect.height = calculateTabHeight(tabPlacement, i, fontHeight);
                    totalHeight = rect.y + rect.height;
                    maxTabHeight = Math.max(maxTabHeight, rect.height);

                    rect.x = x;
                    rect.width = maxTabWidth/* - 2*/;

                }
            }

            if (tabsOverlapBorder) {
                // Pad the selected tab so that it appears raised in front
                padSelectedTab(tabPlacement, selectedIndex);
            }

            // if right to left and tab placement on the top or
            // the bottom, flip x positions and adjust by widths
            if (!leftToRight && !verticalTabRuns) {
                final int rightMargin = size.width - (insets.right + tabAreaInsets.right);
                for (i = 0; i < tabCount; i++) {
                    rects[i].x = rightMargin - rects[i].x - rects[i].width;
                }
            }
            tabScroller.tabPanel.setPreferredSize(new Dimension(totalWidth, totalHeight));
        }
    }

    private class ScrollableTabSupport implements ActionListener, ChangeListener {
        public ScrollableTabViewport viewport;
        public ScrollableTabPanel tabPanel;
        public JButton scrollForwardButton;
        public JButton scrollBackwardButton;
        public CroppedEdge croppedEdge;
        public int leadingTabIndex;

        private final Point tabViewPosition = new Point(0, 0);

        ScrollableTabSupport(final int tabPlacement) {
            viewport = new ScrollableTabViewport();
            tabPanel = new ScrollableTabPanel();
            viewport.setView(tabPanel);
            viewport.addChangeListener(this);
            croppedEdge = new CroppedEdge();
            createButtons();
        }

        /**
         * Recreates the scroll buttons and adds them to the TabbedPane.
         */
        void createButtons() {
            if (scrollForwardButton != null) {
                tabPane.remove(scrollForwardButton);
                scrollForwardButton.removeActionListener(this);
                tabPane.remove(scrollBackwardButton);
                scrollBackwardButton.removeActionListener(this);
            }
            final int tabPlacement = tabPane.getTabPlacement();
            if (tabPlacement == TOP || tabPlacement == BOTTOM) {
                scrollForwardButton = createScrollButton(EAST);
                scrollBackwardButton = createScrollButton(WEST);

            } else { // tabPlacement = LEFT || RIGHT
                scrollForwardButton = createScrollButton(SOUTH);
                scrollBackwardButton = createScrollButton(NORTH);
            }
            scrollForwardButton.addActionListener(this);
            scrollBackwardButton.addActionListener(this);
            tabPane.add(scrollForwardButton);
            tabPane.add(scrollBackwardButton);
        }

        public void scrollForward(final int tabPlacement) {
            final Dimension viewSize = viewport.getViewSize();
            final Rectangle viewRect = viewport.getViewRect();

            if (tabPlacement == TOP || tabPlacement == BOTTOM) {
                if (viewRect.width >= viewSize.width - viewRect.x) {
                    return; // no room left to scroll
                }
            } else { // tabPlacement == LEFT || tabPlacement == RIGHT
                if (viewRect.height >= viewSize.height - viewRect.y) {
                    return;
                }
            }
            setLeadingTabIndex(tabPlacement, leadingTabIndex + 1);
        }

        public void scrollBackward(final int tabPlacement) {
            if (leadingTabIndex == 0) {
                return; // no room left to scroll
            }
            setLeadingTabIndex(tabPlacement, leadingTabIndex - 1);
        }

        public void setLeadingTabIndex(final int tabPlacement, final int index) {
            leadingTabIndex = index;
            final Dimension viewSize = viewport.getViewSize();
            final Rectangle viewRect = viewport.getViewRect();

            switch (tabPlacement) {
                case TOP:
                case BOTTOM:
                    tabViewPosition.x = leadingTabIndex == 0 ? 0 : rects[leadingTabIndex].x;

                    if ((viewSize.width - tabViewPosition.x) < viewRect.width) {
                        // We've scrolled to the end, so adjust the viewport size
                        // to ensure the view position remains aligned on a tab boundary
                        final Dimension extentSize = new Dimension(viewSize.width - tabViewPosition.x, viewRect.height);
                        viewport.setExtentSize(extentSize);
                    }
                    break;
                case LEFT:
                case RIGHT:
                    tabViewPosition.y = leadingTabIndex == 0 ? 0 : rects[leadingTabIndex].y;

                    if ((viewSize.height - tabViewPosition.y) < viewRect.height) {
                        // We've scrolled to the end, so adjust the viewport size
                        // to ensure the view position remains aligned on a tab boundary
                        final Dimension extentSize = new Dimension(viewRect.width, viewSize.height - tabViewPosition.y);
                        viewport.setExtentSize(extentSize);
                    }
            }
            viewport.setViewPosition(tabViewPosition);
        }

        public void stateChanged(final ChangeEvent e) {
            updateView();
        }

        private void updateView() {
            final int tabPlacement = tabPane.getTabPlacement();
            final int tabCount = tabPane.getTabCount();
            final Rectangle vpRect = viewport.getBounds();
            final Dimension viewSize = viewport.getViewSize();
            final Rectangle viewRect = viewport.getViewRect();

            leadingTabIndex = getClosestTab(viewRect.x, viewRect.y);

            // If the tab isn't right aligned, adjust it.
            if (leadingTabIndex + 1 < tabCount) {
                switch (tabPlacement) {
                    case TOP:
                    case BOTTOM:
                        if (rects[leadingTabIndex].x < viewRect.x) {
                            leadingTabIndex++;
                        }
                        break;
                    case LEFT:
                    case RIGHT:
                        if (rects[leadingTabIndex].y < viewRect.y) {
                            leadingTabIndex++;
                        }
                        break;
                }
            }
            final Insets contentInsets = getContentBorderInsets(tabPlacement);
            switch (tabPlacement) {
                case LEFT:
                    tabPane.repaint(vpRect.x + vpRect.width, vpRect.y, contentInsets.left, vpRect.height);
                    scrollBackwardButton.setEnabled(viewRect.y > 0 && leadingTabIndex > 0);
                    scrollForwardButton.setEnabled(leadingTabIndex < tabCount - 1 && viewSize.height - viewRect.y > viewRect.height);
                    break;
                case RIGHT:
                    tabPane.repaint(vpRect.x - contentInsets.right, vpRect.y, contentInsets.right, vpRect.height);
                    scrollBackwardButton.setEnabled(viewRect.y > 0 && leadingTabIndex > 0);
                    scrollForwardButton.setEnabled(leadingTabIndex < tabCount - 1 && viewSize.height - viewRect.y > viewRect.height);
                    break;
                case BOTTOM:
                    tabPane.repaint(vpRect.x, vpRect.y - contentInsets.bottom, vpRect.width, contentInsets.bottom);
                    scrollBackwardButton.setEnabled(viewRect.x > 0 && leadingTabIndex > 0);
                    scrollForwardButton.setEnabled(leadingTabIndex < tabCount - 1 && viewSize.width - viewRect.x > viewRect.width);
                    break;
                case TOP:
                default:
                    tabPane.repaint(vpRect.x, vpRect.y + vpRect.height, vpRect.width, contentInsets.top);
                    scrollBackwardButton.setEnabled(viewRect.x > 0 && leadingTabIndex > 0);
                    scrollForwardButton.setEnabled(leadingTabIndex < tabCount - 1 && viewSize.width - viewRect.x > viewRect.width);
            }
        }

        /**
         * ActionListener for the scroll buttons.
         */
        public void actionPerformed(final ActionEvent e) {
            final ActionMap map = tabPane.getActionMap();

            if (map != null) {
                String actionKey;

                if (e.getSource() == scrollForwardButton) {
                    actionKey = "scrollTabsForwardAction";
                } else {
                    actionKey = "scrollTabsBackwardAction";
                }
                final Action action = map.get(actionKey);

                if (action != null && action.isEnabled()) {
                    action.actionPerformed(new ActionEvent(tabPane, ActionEvent.ACTION_PERFORMED, null, e.getWhen(), e.getModifiers()));
                }
            }
        }

        public String toString() {
            return "viewport.viewSize=" + viewport.getViewSize() + "\n"
                    + "viewport.viewRectangle=" + viewport.getViewRect() + "\n"
                    + "leadingTabIndex=" + leadingTabIndex + "\n"
                    + "tabViewPosition=" + tabViewPosition;
        }

    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions
    private class ScrollableTabViewport extends JViewport implements UIResource {
        public ScrollableTabViewport() {
            super();
            setName("TabbedPane.scrollableViewport");
            setScrollMode(SIMPLE_SCROLL_MODE);
            setOpaque(tabPane.isOpaque());
            Color bgColor = UIManager.getColor("TabbedPane.tabAreaBackground");
            if (bgColor == null) {
                bgColor = tabPane.getBackground();
            }
            setBackground(bgColor);
        }
    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions
    private class ScrollableTabPanel extends JPanel implements UIResource {
        public ScrollableTabPanel() {
            super(null);
            setOpaque(tabPane.isOpaque());
            Color bgColor = UIManager.getColor("TabbedPane.tabAreaBackground");
            if (bgColor == null) {
                bgColor = tabPane.getBackground();
            }
            setBackground(bgColor);
        }

        public void paintComponent(final Graphics g) {
            super.paintComponent(g);
            AquaTabbedPaneCopyFromBasicUI.this.paintTabArea(g, tabPane.getTabPlacement(), tabPane.getSelectedIndex());
            if (tabScroller.croppedEdge.isParamsSet() && tabContainer == null) {
                final Rectangle croppedRect = rects[tabScroller.croppedEdge.getTabIndex()];
                g.translate(croppedRect.x, croppedRect.y);
                tabScroller.croppedEdge.paintComponent(g);
                g.translate(-croppedRect.x, -croppedRect.y);
            }
        }

        public void doLayout() {
            if (getComponentCount() > 0) {
                final Component child = getComponent(0);
                child.setBounds(0, 0, getWidth(), getHeight());
            }
        }
    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions
    private class ScrollableTabButton extends javax.swing.plaf.basic.BasicArrowButton implements UIResource, SwingConstants {
        public ScrollableTabButton(final int direction) {
            super(direction, UIManager.getColor("TabbedPane.selected"), UIManager.getColor("TabbedPane.shadow"), UIManager.getColor("TabbedPane.darkShadow"), UIManager.getColor("TabbedPane.highlight"));
        }
    }

// Controller: event listeners

    private class Handler implements ChangeListener, ContainerListener, FocusListener, MouseListener, MouseMotionListener, PropertyChangeListener {
        //
        // PropertyChangeListener
        //
        public void propertyChange(final PropertyChangeEvent e) {
            final JTabbedPane pane = (JTabbedPane)e.getSource();
            final String name = e.getPropertyName();
            final boolean isScrollLayout = scrollableTabLayoutEnabled();
            if (name == "mnemonicAt") {
                updateMnemonics();
                pane.repaint();
            } else if (name == "displayedMnemonicIndexAt") {
                pane.repaint();
            } else if (name == "indexForTitle") {
                calculatedBaseline = false;
                updateHtmlViews((Integer) e.getNewValue(), false);
            } else if (name == "tabLayoutPolicy") {
                AquaTabbedPaneCopyFromBasicUI.this.uninstallUI(pane);
                AquaTabbedPaneCopyFromBasicUI.this.installUI(pane);
                calculatedBaseline = false;
            } else if (name == "tabPlacement") {
                if (scrollableTabLayoutEnabled()) {
                    tabScroller.createButtons();
                }
                calculatedBaseline = false;
            } else if (name == "opaque" && isScrollLayout) {
                final boolean newVal = ((Boolean)e.getNewValue()).booleanValue();
                tabScroller.tabPanel.setOpaque(newVal);
                tabScroller.viewport.setOpaque(newVal);
            } else if (name == "background" && isScrollLayout) {
                final Color newVal = (Color)e.getNewValue();
                tabScroller.tabPanel.setBackground(newVal);
                tabScroller.viewport.setBackground(newVal);
                final Color newColor = selectedColor == null ? newVal : selectedColor;
                tabScroller.scrollForwardButton.setBackground(newColor);
                tabScroller.scrollBackwardButton.setBackground(newColor);
            } else if (name == "indexForTabComponent") {
                if (tabContainer != null) {
                    tabContainer.removeUnusedTabComponents();
                }
                final Component c = tabPane.getTabComponentAt((Integer)e.getNewValue());
                if (c != null) {
                    if (tabContainer == null) {
                        installTabContainer();
                    } else {
                        tabContainer.add(c);
                    }
                }
                tabPane.revalidate();
                tabPane.repaint();
                calculatedBaseline = false;
            } else if (name == "indexForNullComponent") {
                isRunsDirty = true;
                updateHtmlViews((Integer) e.getNewValue(), true);
            } else if (name == "font" || SwingUtilities2.isScaleChanged(e)) {
                calculatedBaseline = false;
            }
        }

        //
        // ChangeListener
        //
        public void stateChanged(final ChangeEvent e) {
            final JTabbedPane tabPane = (JTabbedPane)e.getSource();
            tabPane.revalidate();
            tabPane.repaint();

            setFocusIndex(tabPane.getSelectedIndex(), false);

            if (scrollableTabLayoutEnabled()) {
                final int index = tabPane.getSelectedIndex();
                if (index < rects.length && index != -1) {
                    tabScroller.tabPanel.scrollRectToVisible((Rectangle)rects[index].clone());
                }
            }
        }

        //
        // MouseListener
        //
        public void mouseClicked(final MouseEvent e) {}

        public void mouseReleased(final MouseEvent e) {}

        public void mouseEntered(final MouseEvent e) {
            setRolloverTab(e.getX(), e.getY());
        }

        public void mouseExited(final MouseEvent e) {
            setRolloverTab(-1);
        }

        public void mousePressed(final MouseEvent e) {
            if (!tabPane.isEnabled()) {
                return;
            }
            final int tabIndex = tabForCoordinate(tabPane, e.getX(), e.getY());
            if (tabIndex >= 0 && tabPane.isEnabledAt(tabIndex)) {
                if (tabIndex != tabPane.getSelectedIndex()) {
                    // Clicking on unselected tab, change selection, do NOT
                    // request focus.
                    // This will trigger the focusIndex to change by way
                    // of stateChanged.
                    tabPane.setSelectedIndex(tabIndex);
                } else if (tabPane.isRequestFocusEnabled()) {
                    // Clicking on selected tab, try and give the tabbedpane
                    // focus.  Repaint will occur in focusGained.
                    tabPane.requestFocus();
                }
            }
        }

        //
        // MouseMotionListener
        //
        public void mouseDragged(final MouseEvent e) {}

        public void mouseMoved(final MouseEvent e) {
            setRolloverTab(e.getX(), e.getY());
        }

        //
        // FocusListener
        //
        public void focusGained(final FocusEvent e) {
            setFocusIndex(tabPane.getSelectedIndex(), true);
        }

        public void focusLost(final FocusEvent e) {
            repaintTab(focusIndex);
        }

        //
        // ContainerListener
        //
        /* GES 2/3/99:
           The container listener code was added to support HTML
           rendering of tab titles.

           Ideally, we would be able to listen for property changes
           when a tab is added or its text modified.  At the moment
           there are no such events because the Beans spec doesn't
           allow 'indexed' property changes (i.e. tab 2's text changed
           from A to B).

           In order to get around this, we listen for tabs to be added
           or removed by listening for the container events.  we then
           queue up a runnable (so the component has a chance to complete
           the add) which checks the tab title of the new component to see
           if it requires HTML rendering.

           The Views (one per tab title requiring HTML rendering) are
           stored in the htmlViews Vector, which is only allocated after
           the first time we run into an HTML tab.  Note that this vector
           is kept in step with the number of pages, and nulls are added
           for those pages whose tab title do not require HTML rendering.

           This makes it easy for the paint and layout code to tell
           whether to invoke the HTML engine without having to check
           the string during time-sensitive operations.

           When we have added a way to listen for tab additions and
           changes to tab text, this code should be removed and
           replaced by something which uses that.  */

        public void componentAdded(final ContainerEvent e) {
            final JTabbedPane tp = (JTabbedPane)e.getContainer();
            final Component child = e.getChild();
            if (child instanceof UIResource) {
                return;
            }
            isRunsDirty = true;
            updateHtmlViews(tp.indexOfComponent(child), true);
        }

        private void updateHtmlViews(int index, boolean inserted) {
            final String title = tabPane.getTitleAt(index);
            Boolean htmlDisabled = (Boolean)
                                   tabPane.getClientProperty("html.disable");
            final boolean isHTML = BasicHTML.isHTMLString(title);
            if (isHTML && !(Boolean.TRUE.equals(htmlDisabled))) {
                if (htmlViews == null) { // Initialize vector
                    htmlViews = createHTMLVector();
                } else { // Vector already exists
                    final View v = BasicHTML.createHTMLView(tabPane, title);
                    setHtmlView(v, inserted, index);
                }
            } else { // Not HTML
                if (htmlViews != null) { // Add placeholder
                    setHtmlView(null, inserted, index);
                } // else nada!
            }
            updateMnemonics();
        }

        private void setHtmlView(View v, boolean inserted, int index) {
            if (inserted || index >= htmlViews.size()) {
                htmlViews.insertElementAt(v, index);
            } else {
                htmlViews.setElementAt(v, index);
            }
        }

        public void componentRemoved(final ContainerEvent e) {
            final JTabbedPane tp = (JTabbedPane)e.getContainer();
            final Component child = e.getChild();
            if (child instanceof UIResource) {
                return;
            }

            // NOTE 4/15/2002 (joutwate):
            // This fix is implemented using client properties since there is
            // currently no IndexPropertyChangeEvent.  Once
            // IndexPropertyChangeEvents have been added this code should be
            // modified to use it.
            final Integer indexObj = (Integer)tp.getClientProperty("__index_to_remove__");
            if (indexObj != null) {
                final int index = indexObj.intValue();
                if (htmlViews != null && htmlViews.size() > index) {
                    htmlViews.removeElementAt(index);
                }
                tp.putClientProperty("__index_to_remove__", null);
            }
            isRunsDirty = true;
            updateMnemonics();

            validateFocusIndex();
        }
    }

    /**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTabbedPaneUI.
     */
    public class PropertyChangeHandler implements PropertyChangeListener {
        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        public void propertyChange(final PropertyChangeEvent e) {
            getHandler().propertyChange(e);
        }
    }

    /**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTabbedPaneUI.
     */
    public class TabSelectionHandler implements ChangeListener {
        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        public void stateChanged(final ChangeEvent e) {
            getHandler().stateChanged(e);
        }
    }

    /**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTabbedPaneUI.
     */
    public class MouseHandler extends MouseAdapter {
        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        public void mousePressed(final MouseEvent e) {
            getHandler().mousePressed(e);
        }
    }

    /**
     * This class should be treated as a &quot;protected&quot; inner class.
     * Instantiate it only within subclasses of BasicTabbedPaneUI.
     */
    public class FocusHandler extends FocusAdapter {
        // NOTE: This class exists only for backward compatibility. All
        // its functionality has been moved into Handler. If you need to add
        // new functionality add it to the Handler, but make sure this
        // class calls into the Handler.
        public void focusGained(final FocusEvent e) {
            getHandler().focusGained(e);
        }

        public void focusLost(final FocusEvent e) {
            getHandler().focusLost(e);
        }
    }

    private Vector<View> createHTMLVector() {
        final Vector<View> htmlViews = new Vector<View>();
        final int count = tabPane.getTabCount();
        if (count > 0) {
            for (int i = 0; i < count; i++) {
                final String title = tabPane.getTitleAt(i);
                if (BasicHTML.isHTMLString(title)) {
                    htmlViews.addElement(BasicHTML.createHTMLView(tabPane, title));
                } else {
                    htmlViews.addElement(null);
                }
            }
        }
        return htmlViews;
    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions
    private class TabContainer extends JPanel implements UIResource {
        private boolean notifyTabbedPane = true;

        public TabContainer() {
            super(null);
            setOpaque(false);
        }

        public void remove(final Component comp) {
            final int index = tabPane.indexOfTabComponent(comp);
            super.remove(comp);
            if (notifyTabbedPane && index != -1) {
                tabPane.setTabComponentAt(index, null);
            }
        }

        private void removeUnusedTabComponents() {
            for (final Component c : getComponents()) {
                if (!(c instanceof UIResource)) {
                    final int index = tabPane.indexOfTabComponent(c);
                    if (index == -1) {
                        super.remove(c);
                    }
                }
            }
        }

        public boolean isOptimizedDrawingEnabled() {
            return tabScroller != null && !tabScroller.croppedEdge.isParamsSet();
        }

        public void doLayout() {
            // We layout tabComponents in JTabbedPane's layout manager
            // and use this method as a hook for repainting tabs
            // to update tabs area e.g. when the size of tabComponent was changed
            if (scrollableTabLayoutEnabled()) {
                tabScroller.tabPanel.repaint();
                tabScroller.updateView();
            } else {
                tabPane.repaint(getBounds());
            }
        }
    }

    @SuppressWarnings("serial") // Superclass is not serializable across versions
    private class CroppedEdge extends JPanel implements UIResource {
        private Shape shape;
        private int tabIndex;
        private int cropline;
        private int cropx, cropy;

        public CroppedEdge() {
            setOpaque(false);
        }

        public void setParams(final int tabIndex, final int cropline, final int cropx, final int cropy) {
            this.tabIndex = tabIndex;
            this.cropline = cropline;
            this.cropx = cropx;
            this.cropy = cropy;
            final Rectangle tabRect = rects[tabIndex];
            setBounds(tabRect);
            shape = createCroppedTabShape(tabPane.getTabPlacement(), tabRect, cropline);
            if (getParent() == null && tabContainer != null) {
                tabContainer.add(this, 0);
            }
        }

        public void resetParams() {
            shape = null;
            if (getParent() == tabContainer && tabContainer != null) {
                tabContainer.remove(this);
            }
        }

        public boolean isParamsSet() {
            return shape != null;
        }

        public int getTabIndex() {
            return tabIndex;
        }

        public int getCropline() {
            return cropline;
        }

        public int getCroppedSideWidth() {
            return 3;
        }

        private Color getBgColor() {
            final Component parent = tabPane.getParent();
            if (parent != null) {
                final Color bg = parent.getBackground();
                if (bg != null) {
                    return bg;
                }
            }
            return UIManager.getColor("control");
        }

        protected void paintComponent(final Graphics g) {
            super.paintComponent(g);
            if (isParamsSet() && g instanceof Graphics2D) {
                final Graphics2D g2 = (Graphics2D)g;
                g2.clipRect(0, 0, getWidth(), getHeight());
                g2.setColor(getBgColor());
                g2.translate(cropx, cropy);
                g2.fill(shape);
                paintCroppedTabEdge(g);
                g2.translate(-cropx, -cropy);
            }
        }
    }

    /**
     * An ActionMap that populates its contents as necessary. The
     * contents are populated by invoking the {@code loadActionMap}
     * method on the passed in Object.
     *
     * @version 1.6, 11/17/05
     * @author Scott Violet
     */
    @SuppressWarnings("serial") // Superclass is not serializable across versions
    static class LazyActionMap extends ActionMapUIResource {
        /**
         * Object to invoke {@code loadActionMap} on. This may be
         * a Class object.
         */
        private transient Object _loader;

        /**
         * Installs an ActionMap that will be populated by invoking the
         * {@code loadActionMap} method on the specified Class
         * when necessary.
         * <p>
         * This should be used if the ActionMap can be shared.
         *
         * @param c JComponent to install the ActionMap on.
         * @param loaderClass Class object that gets loadActionMap invoked
         *                    on.
         * @param defaultsKey Key to use to defaults table to check for
         *        existing map and what resulting Map will be registered on.
         */
        static void installLazyActionMap(final JComponent c, final Class<AquaTabbedPaneCopyFromBasicUI> loaderClass, final String defaultsKey) {
            ActionMap map = (ActionMap)UIManager.get(defaultsKey);
            if (map == null) {
                map = new LazyActionMap(loaderClass);
                UIManager.getLookAndFeelDefaults().put(defaultsKey, map);
            }
            SwingUtilities.replaceUIActionMap(c, map);
        }

        /**
         * Returns an ActionMap that will be populated by invoking the
         * {@code loadActionMap} method on the specified Class
         * when necessary.
         * <p>
         * This should be used if the ActionMap can be shared.
         *
         * @param loaderClass Class object that gets loadActionMap invoked
         *                    on.
         * @param defaultsKey Key to use to defaults table to check for
         *        existing map and what resulting Map will be registered on.
         */
        static ActionMap getActionMap(final Class<AquaTabbedPaneCopyFromBasicUI> loaderClass, final String defaultsKey) {
            ActionMap map = (ActionMap)UIManager.get(defaultsKey);
            if (map == null) {
                map = new LazyActionMap(loaderClass);
                UIManager.getLookAndFeelDefaults().put(defaultsKey, map);
            }
            return map;
        }

        private LazyActionMap(final Class<AquaTabbedPaneCopyFromBasicUI> loader) {
            _loader = loader;
        }

        public void put(final Action action) {
            put(action.getValue(Action.NAME), action);
        }

        public void put(final Object key, final Action action) {
            loadIfNecessary();
            super.put(key, action);
        }

        public Action get(final Object key) {
            loadIfNecessary();
            return super.get(key);
        }

        public void remove(final Object key) {
            loadIfNecessary();
            super.remove(key);
        }

        public void clear() {
            loadIfNecessary();
            super.clear();
        }

        public Object[] keys() {
            loadIfNecessary();
            return super.keys();
        }

        public int size() {
            loadIfNecessary();
            return super.size();
        }

        public Object[] allKeys() {
            loadIfNecessary();
            return super.allKeys();
        }

        public void setParent(final ActionMap map) {
            loadIfNecessary();
            super.setParent(map);
        }

        private void loadIfNecessary() {
            if (_loader != null) {
                final Object loader = _loader;

                _loader = null;
                final Class<?> klass = (Class<?>)loader;
                try {
                    final java.lang.reflect.Method method = klass.getDeclaredMethod("loadActionMap", new Class<?>[] { LazyActionMap.class });
                    method.invoke(klass, new Object[] { this });
                } catch (final NoSuchMethodException nsme) {
                    assert false : "LazyActionMap unable to load actions " + klass;
                } catch (final IllegalAccessException iae) {
                    assert false : "LazyActionMap unable to load actions " + iae;
                } catch (final InvocationTargetException ite) {
                    assert false : "LazyActionMap unable to load actions " + ite;
                } catch (final IllegalArgumentException iae) {
                    assert false : "LazyActionMap unable to load actions " + iae;
                }
            }
        }
    }
}