jdk/src/share/classes/com/sun/java/swing/plaf/gtk/GTKStyle.java
changeset 2 90ce3da70b43
child 438 2ae294e4518c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/com/sun/java/swing/plaf/gtk/GTKStyle.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1141 @@
+/*
+ * Copyright 2002-2007 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package com.sun.java.swing.plaf.gtk;
+
+import java.awt.*;
+import java.lang.reflect.*;
+import java.security.*;
+import java.util.*;
+import javax.swing.*;
+import javax.swing.plaf.*;
+import javax.swing.plaf.synth.*;
+
+import sun.awt.AppContext;
+import sun.awt.UNIXToolkit;
+import sun.swing.SwingUtilities2;
+import sun.swing.plaf.synth.SynthIcon;
+
+import com.sun.java.swing.plaf.gtk.GTKEngine.WidgetType;
+
+/**
+ *
+ * @author Scott Violet
+ */
+class GTKStyle extends SynthStyle implements GTKConstants {
+
+    private static native int nativeGetXThickness(int widgetType);
+    private static native int nativeGetYThickness(int widgetType);
+    private static native int nativeGetColorForState(int widgetType,
+                                                     int state, int typeID);
+    private static native Object nativeGetClassValue(int widgetType,
+                                                     String key);
+    private static native String nativeGetPangoFontName(int widgetType);
+
+    private static final String ICON_PROPERTY_PREFIX = "gtk.icon.";
+
+    static final Color BLACK_COLOR = new ColorUIResource(Color.BLACK);
+    static final Color WHITE_COLOR = new ColorUIResource(Color.WHITE);
+
+    static final Font DEFAULT_FONT = new FontUIResource("sansserif",
+                                                        Font.PLAIN, 10  );
+    static final Insets BUTTON_DEFAULT_BORDER_INSETS = new Insets(1, 1, 1, 1);
+
+    private static final GTKGraphicsUtils GTK_GRAPHICS = new GTKGraphicsUtils();
+
+    /**
+     * Maps from a key that is passed to Style.get to the equivalent class
+     * specific key.
+     */
+    private static final Map<String,String> CLASS_SPECIFIC_MAP;
+
+    /**
+     * Backing style properties that are used if the style does not
+     * defined the property.
+     */
+    private static final Map<String,GTKStockIcon> ICONS_MAP;
+
+    /**
+     * The font used for this particular style, as determined at
+     * construction time.
+     */
+    private final Font font;
+
+    /** Widget type used when looking up class specific values. */
+    private final int widgetType;
+
+    /** The x/y thickness values for this particular style. */
+    private final int xThickness, yThickness;
+
+    GTKStyle(Font userFont, WidgetType widgetType) {
+        this.widgetType = widgetType.ordinal();
+
+        String pangoFontName;
+        synchronized (sun.awt.UNIXToolkit.GTK_LOCK) {
+            xThickness = nativeGetXThickness(this.widgetType);
+            yThickness = nativeGetYThickness(this.widgetType);
+            pangoFontName = nativeGetPangoFontName(this.widgetType);
+        }
+
+        Font pangoFont = null;
+        if (pangoFontName != null) {
+            pangoFont = PangoFonts.lookupFont(pangoFontName);
+        }
+        if (pangoFont != null) {
+            this.font = pangoFont;
+        } else if (userFont != null) {
+            this.font = userFont;
+        } else {
+            this.font = DEFAULT_FONT;
+        }
+    }
+
+    @Override
+    public void installDefaults(SynthContext context) {
+        super.installDefaults(context);
+        if (!context.getRegion().isSubregion()) {
+            context.getComponent().putClientProperty(
+                SwingUtilities2.AA_TEXT_PROPERTY_KEY,
+                GTKLookAndFeel.aaTextInfo);
+        }
+    }
+
+    @Override
+    public SynthGraphicsUtils getGraphicsUtils(SynthContext context) {
+        return GTK_GRAPHICS;
+    }
+
+    /**
+     * Returns a <code>SynthPainter</code> that will route the appropriate
+     * calls to a <code>GTKEngine</code>.
+     *
+     * @param state SynthContext indentifying requestor
+     * @return SynthPainter
+     */
+    @Override
+    public SynthPainter getPainter(SynthContext state) {
+        return GTKPainter.INSTANCE;
+    }
+
+    protected Color getColorForState(SynthContext context, ColorType type) {
+        if (type == ColorType.FOCUS || type == GTKColorType.BLACK) {
+            return BLACK_COLOR;
+        }
+        else if (type == GTKColorType.WHITE) {
+            return WHITE_COLOR;
+        }
+
+        Region id = context.getRegion();
+        int state = context.getComponentState();
+        state = GTKLookAndFeel.synthStateToGTKState(id, state);
+
+        if (type == ColorType.TEXT_FOREGROUND &&
+               (id == Region.BUTTON ||
+                id == Region.CHECK_BOX ||
+                id == Region.CHECK_BOX_MENU_ITEM ||
+                id == Region.MENU ||
+                id == Region.MENU_ITEM ||
+                id == Region.RADIO_BUTTON ||
+                id == Region.RADIO_BUTTON_MENU_ITEM ||
+                id == Region.TABBED_PANE_TAB ||
+                id == Region.TOGGLE_BUTTON ||
+                id == Region.TOOL_TIP ||
+                id == Region.MENU_ITEM_ACCELERATOR ||
+                id == Region.TABBED_PANE_TAB)) {
+            type = ColorType.FOREGROUND;
+        } else if (id == Region.TABLE ||
+                   id == Region.LIST ||
+                   id == Region.TREE ||
+                   id == Region.TREE_CELL) {
+            if (type == ColorType.FOREGROUND) {
+                type = ColorType.TEXT_FOREGROUND;
+                if (state == SynthConstants.PRESSED) {
+                    state = SynthConstants.SELECTED;
+                }
+            } else if (type == ColorType.BACKGROUND) {
+                type = ColorType.TEXT_BACKGROUND;
+            }
+        }
+
+        return getStyleSpecificColor(context, state, type);
+    }
+
+    /**
+     * Returns color specific to the current style. This method is
+     * invoked when other variants don't fit.
+     */
+    private Color getStyleSpecificColor(SynthContext context, int state,
+                                        ColorType type)
+    {
+        state = GTKLookAndFeel.synthStateToGTKStateType(state).ordinal();
+        synchronized (sun.awt.UNIXToolkit.GTK_LOCK) {
+            int rgb = nativeGetColorForState(widgetType, state,
+                                             type.getID());
+            return new ColorUIResource(rgb);
+        }
+    }
+
+    Color getGTKColor(int state, ColorType type) {
+        return getGTKColor(null, state, type);
+    }
+
+    /**
+     * Returns the color for the specified state.
+     *
+     * @param context SynthContext identifying requester
+     * @param state to get the color for
+     * @param type of the color
+     * @return Color to render with
+     */
+    Color getGTKColor(SynthContext context, int state, ColorType type) {
+        if (context != null) {
+            JComponent c = context.getComponent();
+            Region id = context.getRegion();
+
+            state = GTKLookAndFeel.synthStateToGTKState(id, state);
+            if (!id.isSubregion() &&
+                (state & SynthConstants.ENABLED) != 0) {
+                if (type == ColorType.BACKGROUND ||
+                    type == ColorType.TEXT_BACKGROUND) {
+                    Color bg = c.getBackground();
+                    if (!(bg instanceof UIResource)) {
+                        return bg;
+                    }
+                }
+                else if (type == ColorType.FOREGROUND ||
+                         type == ColorType.TEXT_FOREGROUND) {
+                    Color fg = c.getForeground();
+                    if (!(fg instanceof UIResource)) {
+                        return fg;
+                    }
+                }
+            }
+        }
+
+        return getStyleSpecificColor(context, state, type);
+    }
+
+    @Override
+    public Color getColor(SynthContext context, ColorType type) {
+        JComponent c = context.getComponent();
+        Region id = context.getRegion();
+        int state = context.getComponentState();
+
+        if (c.getName() == "Table.cellRenderer") {
+             if (type == ColorType.BACKGROUND) {
+                 return c.getBackground();
+             }
+             if (type == ColorType.FOREGROUND) {
+                 return c.getForeground();
+             }
+        }
+
+        if (id == Region.LABEL && type == ColorType.TEXT_FOREGROUND) {
+            type = ColorType.FOREGROUND;
+        }
+
+        // For the enabled state, prefer the widget's colors
+        if (!id.isSubregion() && (state & SynthConstants.ENABLED) != 0) {
+            if (type == ColorType.BACKGROUND) {
+                return c.getBackground();
+            }
+            else if (type == ColorType.FOREGROUND) {
+                return c.getForeground();
+            }
+            else if (type == ColorType.TEXT_FOREGROUND) {
+                // If getForeground returns a non-UIResource it means the
+                // developer has explicitly set the foreground, use it over
+                // that of TEXT_FOREGROUND as that is typically the expected
+                // behavior.
+                Color color = c.getForeground();
+                if (color != null && !(color instanceof UIResource)) {
+                    return color;
+                }
+            }
+        }
+        return getColorForState(context, type);
+    }
+
+    protected Font getFontForState(SynthContext context) {
+        return font;
+    }
+
+    /**
+     * Returns the X thickness to use for this GTKStyle.
+     *
+     * @return x thickness.
+     */
+    int getXThickness() {
+        return xThickness;
+    }
+
+    /**
+     * Returns the Y thickness to use for this GTKStyle.
+     *
+     * @return y thickness.
+     */
+    int getYThickness() {
+        return yThickness;
+    }
+
+    /**
+     * Returns the Insets. If <code>insets</code> is non-null the resulting
+     * insets will be placed in it, otherwise a new Insets object will be
+     * created and returned.
+     *
+     * @param context SynthContext indentifying requestor
+     * @param insets Where to place Insets
+     * @return Insets.
+     */
+    @Override
+    public Insets getInsets(SynthContext state, Insets insets) {
+        Region id = state.getRegion();
+        JComponent component = state.getComponent();
+        String name = (id.isSubregion()) ? null : component.getName();
+
+        if (insets == null) {
+            insets = new Insets(0, 0, 0, 0);
+        } else {
+            insets.top = insets.bottom = insets.left = insets.right = 0;
+        }
+
+        if (id == Region.ARROW_BUTTON || id == Region.BUTTON ||
+                id == Region.TOGGLE_BUTTON) {
+            if ("Spinner.previousButton" == name ||
+                    "Spinner.nextButton" == name) {
+                return getSimpleInsets(state, insets, 1);
+            } else {
+                return getButtonInsets(state, insets);
+            }
+        }
+        else if (id == Region.CHECK_BOX || id == Region.RADIO_BUTTON) {
+            return getRadioInsets(state, insets);
+        }
+        else if (id == Region.MENU_BAR) {
+            return getMenuBarInsets(state, insets);
+        }
+        else if (id == Region.MENU ||
+                 id == Region.MENU_ITEM ||
+                 id == Region.CHECK_BOX_MENU_ITEM ||
+                 id == Region.RADIO_BUTTON_MENU_ITEM) {
+            return getMenuItemInsets(state, insets);
+        }
+        else if (id == Region.FORMATTED_TEXT_FIELD) {
+            return getTextFieldInsets(state, insets);
+        }
+        else if (id == Region.INTERNAL_FRAME) {
+            insets = Metacity.INSTANCE.getBorderInsets(state, insets);
+        }
+        else if (id == Region.LABEL) {
+            if ("TableHeader.renderer" == name) {
+                return getButtonInsets(state, insets);
+            }
+            else if (component instanceof ListCellRenderer) {
+                return getTextFieldInsets(state, insets);
+            }
+            else if ("Tree.cellRenderer" == name) {
+                return getSimpleInsets(state, insets, 1);
+            }
+        }
+        else if (id == Region.OPTION_PANE) {
+            return getSimpleInsets(state, insets, 6);
+        }
+        else if (id == Region.POPUP_MENU) {
+            return getSimpleInsets(state, insets, 2);
+        }
+        else if (id == Region.PROGRESS_BAR || id == Region.SLIDER ||
+                 id == Region.TABBED_PANE  || id == Region.TABBED_PANE_CONTENT ||
+                 id == Region.TOOL_BAR     ||
+                 id == Region.TOOL_BAR_DRAG_WINDOW ||
+                 id == Region.TOOL_TIP) {
+            return getThicknessInsets(state, insets);
+        }
+        else if (id == Region.SCROLL_BAR) {
+            return getScrollBarInsets(state, insets);
+        }
+        else if (id == Region.SLIDER_TRACK) {
+            return getSliderTrackInsets(state, insets);
+        }
+        else if (id == Region.TABBED_PANE_TAB) {
+            return getTabbedPaneTabInsets(state, insets);
+        }
+        else if (id == Region.TEXT_FIELD || id == Region.PASSWORD_FIELD) {
+            if (name == "Tree.cellEditor") {
+                return getSimpleInsets(state, insets, 1);
+            }
+            return getTextFieldInsets(state, insets);
+        } else if (id == Region.SEPARATOR ||
+                   id == Region.POPUP_MENU_SEPARATOR ||
+                   id == Region.TOOL_BAR_SEPARATOR) {
+            return getSeparatorInsets(state, insets);
+        } else if (id == GTKEngine.CustomRegion.TITLED_BORDER) {
+            return getThicknessInsets(state, insets);
+        }
+        return insets;
+    }
+
+    private Insets getButtonInsets(SynthContext context, Insets insets) {
+        // The following calculations are derived from gtkbutton.c
+        // (GTK+ version 2.8.20), gtk_button_size_allocate() method.
+        int CHILD_SPACING = 1;
+        int focusSize = getClassSpecificIntValue(context, "focus-line-width",1);
+        int focusPad = getClassSpecificIntValue(context, "focus-padding", 1);
+        int xThickness = getXThickness();
+        int yThickness = getYThickness();
+        int w = focusSize + focusPad + xThickness + CHILD_SPACING;
+        int h = focusSize + focusPad + yThickness + CHILD_SPACING;
+        insets.left = insets.right = w;
+        insets.top = insets.bottom = h;
+
+        Component component = context.getComponent();
+        if ((component instanceof JButton) &&
+            !(component.getParent() instanceof JToolBar) &&
+            ((JButton)component).isDefaultCapable())
+        {
+            // Include the default border insets, but only for JButtons
+            // that are default capable.  Note that
+            // JButton.getDefaultCapable() returns true by default, but
+            // GtkToolButtons are never default capable, so we skip this
+            // step if the button is contained in a toolbar.
+            Insets defaultInsets = getClassSpecificInsetsValue(context,
+                          "default-border", BUTTON_DEFAULT_BORDER_INSETS);
+            insets.left += defaultInsets.left;
+            insets.right += defaultInsets.right;
+            insets.top += defaultInsets.top;
+            insets.bottom += defaultInsets.bottom;
+        }
+
+        return insets;
+    }
+
+    /*
+     * This is used for both RADIO_BUTTON and CHECK_BOX.
+     */
+    private Insets getRadioInsets(SynthContext context, Insets insets) {
+        // The following calculations are derived from gtkcheckbutton.c
+        // (GTK+ version 2.8.20), gtk_check_button_size_allocate() method.
+        int focusSize =
+            getClassSpecificIntValue(context, "focus-line-width", 1);
+        int focusPad =
+            getClassSpecificIntValue(context, "focus-padding", 1);
+        int totalFocus = focusSize + focusPad;
+
+        // Note: GTKIconFactory.DelegateIcon will have already included the
+        // "indicator-spacing" value in the size of the indicator icon,
+        // which explains why we use zero as the left inset (or right inset
+        // in the RTL case); see 6489585 for more details.
+        insets.top    = totalFocus;
+        insets.bottom = totalFocus;
+        if (context.getComponent().getComponentOrientation().isLeftToRight()) {
+            insets.left  = 0;
+            insets.right = totalFocus;
+        } else {
+            insets.left  = totalFocus;
+            insets.right = 0;
+        }
+
+        return insets;
+    }
+
+    private Insets getMenuBarInsets(SynthContext context, Insets insets) {
+        // The following calculations are derived from gtkmenubar.c
+        // (GTK+ version 2.8.20), gtk_menu_bar_size_allocate() method.
+        int internalPadding = getClassSpecificIntValue(context,
+                                                       "internal-padding", 1);
+        int xThickness = getXThickness();
+        int yThickness = getYThickness();
+        insets.left = insets.right = xThickness + internalPadding;
+        insets.top = insets.bottom = yThickness + internalPadding;
+        return insets;
+    }
+
+    private Insets getMenuItemInsets(SynthContext context, Insets insets) {
+        // The following calculations are derived from gtkmenuitem.c
+        // (GTK+ version 2.8.20), gtk_menu_item_size_allocate() method.
+        int horizPadding = getClassSpecificIntValue(context,
+                                                    "horizontal-padding", 3);
+        int xThickness = getXThickness();
+        int yThickness = getYThickness();
+        insets.left = insets.right = xThickness + horizPadding;
+        insets.top = insets.bottom = yThickness;
+        return insets;
+    }
+
+    private Insets getThicknessInsets(SynthContext context, Insets insets) {
+        insets.left = insets.right = getXThickness();
+        insets.top = insets.bottom = getYThickness();
+        return insets;
+    }
+
+    private Insets getSeparatorInsets(SynthContext context, Insets insets) {
+        int horizPadding = 0;
+        if (context.getRegion() == Region.POPUP_MENU_SEPARATOR) {
+            horizPadding =
+                getClassSpecificIntValue(context, "horizontal-padding", 3);
+        }
+        insets.right = insets.left = getXThickness() + horizPadding;
+        insets.top = insets.bottom = getYThickness();
+        return insets;
+    }
+
+    private Insets getSliderTrackInsets(SynthContext context, Insets insets) {
+        int focusSize = getClassSpecificIntValue(context, "focus-line-width", 1);
+        int focusPad = getClassSpecificIntValue(context, "focus-padding", 1);
+        insets.top = insets.bottom =
+                insets.left = insets.right = focusSize + focusPad;
+        return insets;
+    }
+
+    private Insets getSimpleInsets(SynthContext context, Insets insets, int n) {
+        insets.top = insets.bottom = insets.right = insets.left = n;
+        return insets;
+    }
+
+    private Insets getTabbedPaneTabInsets(SynthContext context, Insets insets) {
+        int xThickness = getXThickness();
+        int yThickness = getYThickness();
+        int focusSize = getClassSpecificIntValue(context, "focus-line-width",1);
+        int pad = 2;
+
+        insets.left = insets.right = focusSize + pad + xThickness;
+        insets.top = insets.bottom = focusSize + pad + yThickness;
+        return insets;
+    }
+
+    // NOTE: this is called for ComboBox, and FormattedTextField also
+    private Insets getTextFieldInsets(SynthContext context, Insets insets) {
+        insets = getClassSpecificInsetsValue(context, "inner-border",
+                                    getSimpleInsets(context, insets, 2));
+
+        int xThickness = getXThickness();
+        int yThickness = getYThickness();
+        boolean interiorFocus =
+                getClassSpecificBoolValue(context, "interior-focus", true);
+        int focusSize = 0;
+
+        if (!interiorFocus) {
+            focusSize = getClassSpecificIntValue(context, "focus-line-width",1);
+        }
+
+        insets.left   += focusSize + xThickness;
+        insets.right  += focusSize + xThickness;
+        insets.top    += focusSize + yThickness;
+        insets.bottom += focusSize + yThickness;
+        return insets;
+    }
+
+    private Insets getScrollBarInsets(SynthContext context, Insets insets) {
+        int troughBorder =
+            getClassSpecificIntValue(context, "trough-border", 1);
+        insets.left = insets.right = insets.top = insets.bottom = troughBorder;
+
+        JComponent c = context.getComponent();
+        if (c.getParent() instanceof JScrollPane) {
+            // This scrollbar is part of a scrollpane; use only the
+            // "scrollbar-spacing" style property to determine the padding
+            // between the scrollbar and its parent scrollpane.
+            int spacing =
+                getClassSpecificIntValue(WidgetType.SCROLL_PANE,
+                                         "scrollbar-spacing", 3);
+            if (((JScrollBar)c).getOrientation() == JScrollBar.HORIZONTAL) {
+                insets.top += spacing;
+            } else {
+                if (c.getComponentOrientation().isLeftToRight()) {
+                    insets.left += spacing;
+                } else {
+                    insets.right += spacing;
+                }
+            }
+        } else {
+            // This is a standalone scrollbar; leave enough room for the
+            // focus line in addition to the trough border.
+            if (c.isFocusable()) {
+                int focusSize =
+                    getClassSpecificIntValue(context, "focus-line-width", 1);
+                int focusPad =
+                    getClassSpecificIntValue(context, "focus-padding", 1);
+                int totalFocus = focusSize + focusPad;
+                insets.left   += totalFocus;
+                insets.right  += totalFocus;
+                insets.top    += totalFocus;
+                insets.bottom += totalFocus;
+            }
+        }
+        return insets;
+    }
+
+    /**
+     * Returns the value for a class specific property for a particular
+     * WidgetType.  This method is useful in those cases where we need to
+     * fetch a value for a Region that is not associated with the component
+     * currently in use (e.g. we need to figure out the insets for a
+     * SCROLL_BAR, but certain values can only be extracted from a
+     * SCROLL_PANE region).
+     *
+     * @param wt WidgetType for which to fetch the value
+     * @param key Key identifying class specific value
+     * @return Value, or null if one has not been defined
+     */
+    private static Object getClassSpecificValue(WidgetType wt, String key) {
+        synchronized (UNIXToolkit.GTK_LOCK) {
+            return nativeGetClassValue(wt.ordinal(), key);
+        }
+    }
+
+    /**
+     * Convenience method to get a class specific integer value for
+     * a particular WidgetType.
+     *
+     * @param wt WidgetType for which to fetch the value
+     * @param key Key identifying class specific value
+     * @param defaultValue Returned if there is no value for the specified
+     *        type
+     * @return Value, or defaultValue if <code>key</code> is not defined
+     */
+    private static int getClassSpecificIntValue(WidgetType wt, String key,
+                                                int defaultValue)
+    {
+        Object value = getClassSpecificValue(wt, key);
+        if (value instanceof Number) {
+            return ((Number)value).intValue();
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Returns the value for a class specific property. A class specific value
+     * is a value that will be picked up based on class hierarchy.
+     *
+     * @param key Key identifying class specific value
+     * @return Value, or null if one has not been defined.
+     */
+    Object getClassSpecificValue(String key) {
+        synchronized (sun.awt.UNIXToolkit.GTK_LOCK) {
+            return nativeGetClassValue(widgetType, key);
+        }
+    }
+
+    /**
+     * Convenience method to get a class specific integer value.
+     *
+     * @param context SynthContext indentifying requestor
+     * @param key Key identifying class specific value
+     * @param defaultValue Returned if there is no value for the specified
+     *        type
+     * @return Value, or defaultValue if <code>key</code> is not defined
+     */
+    int getClassSpecificIntValue(SynthContext context, String key,
+                                 int defaultValue)
+    {
+        Object value = getClassSpecificValue(key);
+
+        if (value instanceof Number) {
+            return ((Number)value).intValue();
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Convenience method to get a class specific Insets value.
+     *
+     * @param context SynthContext indentifying requestor
+     * @param key Key identifying class specific value
+     * @param defaultValue Returned if there is no value for the specified
+     *        type
+     * @return Value, or defaultValue if <code>key</code> is not defined
+     */
+    Insets getClassSpecificInsetsValue(SynthContext context, String key,
+                                       Insets defaultValue)
+    {
+        Object value = getClassSpecificValue(key);
+
+        if (value instanceof Insets) {
+            return (Insets)value;
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Convenience method to get a class specific Boolean value.
+     *
+     * @param context SynthContext indentifying requestor
+     * @param key Key identifying class specific value
+     * @param defaultValue Returned if there is no value for the specified
+     *        type
+     * @return Value, or defaultValue if <code>key</code> is not defined
+     */
+    boolean getClassSpecificBoolValue(SynthContext context, String key,
+                                      boolean defaultValue)
+    {
+        Object value = getClassSpecificValue(key);
+
+        if (value instanceof Boolean) {
+            return ((Boolean)value).booleanValue();
+        }
+        return defaultValue;
+    }
+
+    /**
+     * Returns the value to initialize the opacity property of the Component
+     * to. A Style should NOT assume the opacity will remain this value, the
+     * developer may reset it or override it.
+     *
+     * @param context SynthContext indentifying requestor
+     * @return opaque Whether or not the JComponent is opaque.
+     */
+    @Override
+    public boolean isOpaque(SynthContext context) {
+        Region region = context.getRegion();
+        if (region == Region.COMBO_BOX ||
+              region == Region.DESKTOP_PANE ||
+              region == Region.DESKTOP_ICON ||
+              region == Region.EDITOR_PANE ||
+              region == Region.FORMATTED_TEXT_FIELD ||
+              region == Region.INTERNAL_FRAME ||
+              region == Region.LIST ||
+              region == Region.MENU_BAR ||
+              region == Region.PANEL ||
+              region == Region.PASSWORD_FIELD ||
+              region == Region.POPUP_MENU ||
+              region == Region.PROGRESS_BAR ||
+              region == Region.ROOT_PANE ||
+              region == Region.SCROLL_PANE ||
+              region == Region.SPINNER ||
+              region == Region.SPLIT_PANE_DIVIDER ||
+              region == Region.TABLE ||
+              region == Region.TEXT_AREA ||
+              region == Region.TEXT_FIELD ||
+              region == Region.TEXT_PANE ||
+              region == Region.TOOL_BAR_DRAG_WINDOW ||
+              region == Region.TOOL_TIP ||
+              region == Region.TREE ||
+              region == Region.VIEWPORT) {
+            return true;
+        }
+        Component c = context.getComponent();
+        String name = c.getName();
+        if (name == "ComboBox.renderer" || name == "ComboBox.listRenderer") {
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public Object get(SynthContext context, Object key) {
+        // See if this is a class specific value.
+        String classKey = CLASS_SPECIFIC_MAP.get(key);
+        if (classKey != null) {
+            Object value = getClassSpecificValue(classKey);
+            if (value != null) {
+                return value;
+            }
+        }
+
+        // Is it a specific value ?
+        if (key == "ScrollPane.viewportBorderInsets") {
+            return getThicknessInsets(context, new Insets(0, 0, 0, 0));
+        }
+        else if (key == "Slider.tickColor") {
+            return getColorForState(context, ColorType.FOREGROUND);
+        }
+        else if (key == "ScrollBar.minimumThumbSize") {
+            int len =
+                getClassSpecificIntValue(context, "min-slider-length", 21);
+            JScrollBar sb = (JScrollBar)context.getComponent();
+            if (sb.getOrientation() == JScrollBar.HORIZONTAL) {
+                return new DimensionUIResource(len, 0);
+            } else {
+                return new DimensionUIResource(0, len);
+            }
+        }
+        else if (key == "Separator.thickness") {
+            JSeparator sep = (JSeparator)context.getComponent();
+            if (sep.getOrientation() == JSeparator.HORIZONTAL) {
+                return getYThickness();
+            } else {
+                return getXThickness();
+            }
+        }
+        else if (key == "ToolBar.separatorSize") {
+            int size = getClassSpecificIntValue(WidgetType.TOOL_BAR,
+                                                "space-size", 12);
+            return new DimensionUIResource(size, size);
+        }
+        else if (key == "ScrollBar.buttonSize") {
+            JScrollBar sb = (JScrollBar)context.getComponent().getParent();
+            boolean horiz = (sb.getOrientation() == JScrollBar.HORIZONTAL);
+            WidgetType wt = horiz ?
+                WidgetType.HSCROLL_BAR : WidgetType.VSCROLL_BAR;
+            int sliderWidth = getClassSpecificIntValue(wt, "slider-width", 14);
+            int stepperSize = getClassSpecificIntValue(wt, "stepper-size", 14);
+            return horiz ?
+                new DimensionUIResource(stepperSize, sliderWidth) :
+                new DimensionUIResource(sliderWidth, stepperSize);
+        }
+        else if (key == "ArrowButton.size") {
+            String name = context.getComponent().getName();
+            if (name != null && name.startsWith("Spinner")) {
+                // Believe it or not, the size of a spinner arrow button is
+                // dependent upon the size of the spinner's font.  These
+                // calculations come from gtkspinbutton.c (version 2.8.20),
+                // spin_button_get_arrow_size() method.
+                String pangoFontName;
+                synchronized (sun.awt.UNIXToolkit.GTK_LOCK) {
+                    pangoFontName =
+                        nativeGetPangoFontName(WidgetType.SPINNER.ordinal());
+                }
+                int arrowSize = (pangoFontName != null) ?
+                    PangoFonts.getFontSize(pangoFontName) : 10;
+                return (arrowSize + (getXThickness() * 2));
+            }
+            // For all other kinds of arrow buttons (e.g. combobox arrow
+            // buttons), we will simply fall back on the value of
+            // ArrowButton.size as defined in the UIDefaults for
+            // GTKLookAndFeel when we call UIManager.get() below...
+        }
+        else if ("CheckBox.iconTextGap".equals(key) ||
+                 "RadioButton.iconTextGap".equals(key))
+        {
+            // The iconTextGap value needs to include "indicator-spacing"
+            // and it also needs to leave enough space for the focus line,
+            // which falls between the indicator icon and the text.
+            // See getRadioInsets() and 6489585 for more details.
+            int indicatorSpacing =
+                getClassSpecificIntValue(context, "indicator-spacing", 2);
+            int focusSize =
+                getClassSpecificIntValue(context, "focus-line-width", 1);
+            int focusPad =
+                getClassSpecificIntValue(context, "focus-padding", 1);
+            return indicatorSpacing + focusSize + focusPad;
+        }
+
+        // Is it a stock icon ?
+        GTKStockIcon stockIcon = null;
+        synchronized (ICONS_MAP) {
+            stockIcon = ICONS_MAP.get(key);
+        }
+
+        if (stockIcon != null) {
+            return stockIcon;
+        }
+
+        // Is it another kind of value ?
+        if (key != "engine") {
+            // For backward compatability we'll fallback to the UIManager.
+            // We don't go to the UIManager for engine as the engine is GTK
+            // specific.
+            Object value = UIManager.get(key);
+            if (key == "Table.rowHeight") {
+                int focusLineWidth = getClassSpecificIntValue(context,
+                        "focus-line-width", 0);
+                if (value == null && focusLineWidth > 0) {
+                    value = new Integer(16 + 2 * focusLineWidth);
+                }
+            }
+            return value;
+        }
+
+        // Don't call super, we don't want to pick up defaults from
+        // SynthStyle.
+        return null;
+    }
+
+    private Icon getStockIcon(SynthContext context, String key, int type) {
+        TextDirection direction = TextDirection.LTR;
+
+        if (context != null) {
+            ComponentOrientation co = context.getComponent().
+                                              getComponentOrientation();
+
+            if (co != null && !co.isLeftToRight()) {
+                direction = TextDirection.RTL;
+            }
+        }
+
+        // First try loading a theme-specific icon using the native
+        // GTK libraries (native GTK handles the resizing for us).
+        Icon icon = getStyleSpecificIcon(key, direction, type);
+        if (icon != null) {
+            return icon;
+        }
+
+        // In a failure case where native GTK (unexpectedly) returns a
+        // null icon, we can try loading a default icon as a fallback.
+        String propName = ICON_PROPERTY_PREFIX + key + '.' + type + '.' +
+                          (direction == TextDirection.RTL ? "rtl" : "ltr");
+        Image img = (Image)
+            Toolkit.getDefaultToolkit().getDesktopProperty(propName);
+        if (img != null) {
+            return new ImageIcon(img);
+        }
+
+        // In an extreme failure situation, just return null (callers are
+        // already prepared to handle a null icon, so the worst that can
+        // happen is that an icon won't be included in the button/dialog).
+        return null;
+    }
+
+    private Icon getStyleSpecificIcon(String key,
+                                      TextDirection direction, int type)
+    {
+        UNIXToolkit tk = (UNIXToolkit)Toolkit.getDefaultToolkit();
+        Image img =
+            tk.getStockIcon(widgetType, key, type, direction.ordinal(), null);
+        return (img != null) ? new ImageIcon(img) : null;
+    }
+
+    static class GTKStockIconInfo {
+        private static Map<String,Integer> ICON_TYPE_MAP;
+        private static final Object ICON_SIZE_KEY = new StringBuffer("IconSize");
+
+        private static Dimension[] getIconSizesMap() {
+            AppContext appContext = AppContext.getAppContext();
+            Dimension[] iconSizes = (Dimension[])appContext.get(ICON_SIZE_KEY);
+
+            if (iconSizes == null) {
+                iconSizes = new Dimension[7];
+                iconSizes[0] = null;                  // GTK_ICON_SIZE_INVALID
+                iconSizes[1] = new Dimension(16, 16); // GTK_ICON_SIZE_MENU
+                iconSizes[2] = new Dimension(18, 18); // GTK_ICON_SIZE_SMALL_TOOLBAR
+                iconSizes[3] = new Dimension(24, 24); // GTK_ICON_SIZE_LARGE_TOOLBAR
+                iconSizes[4] = new Dimension(20, 20); // GTK_ICON_SIZE_BUTTON
+                iconSizes[5] = new Dimension(32, 32); // GTK_ICON_SIZE_DND
+                iconSizes[6] = new Dimension(48, 48); // GTK_ICON_SIZE_DIALOG
+                appContext.put(ICON_SIZE_KEY, iconSizes);
+            }
+            return iconSizes;
+        }
+
+        /**
+         * Return the size of a particular icon type (logical size)
+         *
+         * @param type icon type (GtkIconSize value)
+         * @return a Dimension object, or null if lsize is invalid
+         */
+        public static Dimension getIconSize(int type) {
+            Dimension[] iconSizes = getIconSizesMap();
+            return type >= 0 && type < iconSizes.length ?
+                iconSizes[type] : null;
+        }
+
+        /**
+         * Change icon size in a type to size mapping. This is called by code
+         * that parses the gtk-icon-sizes setting
+         *
+         * @param type icon type (GtkIconSize value)
+         * @param w the new icon width
+         * @param h the new icon height
+         */
+        public static void setIconSize(int type, int w, int h) {
+            Dimension[] iconSizes = getIconSizesMap();
+            if (type >= 0 && type < iconSizes.length) {
+                iconSizes[type] = new Dimension(w, h);
+            }
+        }
+
+        /**
+         * Return icon type (GtkIconSize value) given a symbolic name which can
+         * occur in a theme file.
+         *
+         * @param size symbolic name, e.g. gtk-button
+         * @return icon type. Valid types are 1 to 6
+         */
+        public static int getIconType(String size) {
+            if (size == null) {
+                return UNDEFINED;
+            }
+            if (ICON_TYPE_MAP == null) {
+                initIconTypeMap();
+            }
+            Integer n = ICON_TYPE_MAP.get(size);
+            return n != null ? n.intValue() : UNDEFINED;
+        }
+
+        private static void initIconTypeMap() {
+            ICON_TYPE_MAP = new HashMap<String,Integer>();
+            ICON_TYPE_MAP.put("gtk-menu", new Integer(1));
+            ICON_TYPE_MAP.put("gtk-small-toolbar", new Integer(2));
+            ICON_TYPE_MAP.put("gtk-large-toolbar", new Integer(3));
+            ICON_TYPE_MAP.put("gtk-button", new Integer(4));
+            ICON_TYPE_MAP.put("gtk-dnd", new Integer(5));
+            ICON_TYPE_MAP.put("gtk-dialog", new Integer(6));
+        }
+
+    }
+
+    /**
+     * An Icon that is fetched using getStockIcon.
+     */
+    private static class GTKStockIcon extends SynthIcon {
+        private String key;
+        private int size;
+        private boolean loadedLTR;
+        private boolean loadedRTL;
+        private Icon ltrIcon;
+        private Icon rtlIcon;
+        private SynthStyle style;
+
+        GTKStockIcon(String key, int size) {
+            this.key = key;
+            this.size = size;
+        }
+
+        public void paintIcon(SynthContext context, Graphics g, int x,
+                              int y, int w, int h) {
+            Icon icon = getIcon(context);
+
+            if (icon != null) {
+                if (context == null) {
+                    icon.paintIcon(null, g, x, y);
+                }
+                else {
+                    icon.paintIcon(context.getComponent(), g, x, y);
+                }
+            }
+        }
+
+        public int getIconWidth(SynthContext context) {
+            Icon icon = getIcon(context);
+
+            if (icon != null) {
+                return icon.getIconWidth();
+            }
+            return 0;
+        }
+
+        public int getIconHeight(SynthContext context) {
+            Icon icon = getIcon(context);
+
+            if (icon != null) {
+                return icon.getIconHeight();
+            }
+            return 0;
+        }
+
+        private Icon getIcon(SynthContext context) {
+            if (context != null) {
+                ComponentOrientation co = context.getComponent().
+                                                  getComponentOrientation();
+                SynthStyle style = context.getStyle();
+
+                if (style != this.style) {
+                    this.style = style;
+                    loadedLTR = loadedRTL = false;
+                }
+                if (co == null || co.isLeftToRight()) {
+                    if (!loadedLTR) {
+                        loadedLTR = true;
+                        ltrIcon = ((GTKStyle)context.getStyle()).
+                                  getStockIcon(context, key, size);
+                    }
+                    return ltrIcon;
+                }
+                else if (!loadedRTL) {
+                    loadedRTL = true;
+                    rtlIcon = ((GTKStyle)context.getStyle()).
+                              getStockIcon(context, key,size);
+                }
+                return rtlIcon;
+            }
+            return ltrIcon;
+        }
+    }
+
+    /**
+     * GTKLazyValue is a slimmed down version of <code>ProxyLaxyValue</code>.
+     * The code is duplicate so that it can get at the package private
+     * classes in gtk.
+     */
+    static class GTKLazyValue implements UIDefaults.LazyValue {
+        /**
+         * Name of the class to create.
+         */
+        private String className;
+        private String methodName;
+
+        GTKLazyValue(String name) {
+            this(name, null);
+        }
+
+        GTKLazyValue(String name, String methodName) {
+            this.className = name;
+            this.methodName = methodName;
+        }
+
+        public Object createValue(UIDefaults table) {
+            try {
+                Class c = Class.forName(className, true,Thread.currentThread().
+                                        getContextClassLoader());
+
+                if (methodName == null) {
+                    return c.newInstance();
+                }
+                Method m = c.getMethod(methodName, (Class[])null);
+
+                return m.invoke(c, (Object[])null);
+            } catch (ClassNotFoundException cnfe) {
+            } catch (IllegalAccessException iae) {
+            } catch (InvocationTargetException ite) {
+            } catch (NoSuchMethodException nsme) {
+            } catch (InstantiationException ie) {
+            }
+            return null;
+        }
+    }
+
+    static {
+        CLASS_SPECIFIC_MAP = new HashMap<String,String>();
+        CLASS_SPECIFIC_MAP.put("Slider.thumbHeight", "slider-width");
+        CLASS_SPECIFIC_MAP.put("Slider.trackBorder", "trough-border");
+        CLASS_SPECIFIC_MAP.put("SplitPane.size", "handle-size");
+        CLASS_SPECIFIC_MAP.put("Tree.expanderSize", "expander-size");
+        CLASS_SPECIFIC_MAP.put("ScrollBar.thumbHeight", "slider-width");
+        CLASS_SPECIFIC_MAP.put("ScrollBar.width", "slider-width");
+        CLASS_SPECIFIC_MAP.put("TextArea.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("TextArea.caretAspectRatio", "cursor-aspect-ratio");
+        CLASS_SPECIFIC_MAP.put("TextField.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("TextField.caretAspectRatio", "cursor-aspect-ratio");
+        CLASS_SPECIFIC_MAP.put("PasswordField.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("PasswordField.caretAspectRatio", "cursor-aspect-ratio");
+        CLASS_SPECIFIC_MAP.put("FormattedTextField.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("FormattedTextField.caretAspectRatio", "cursor-aspect-");
+        CLASS_SPECIFIC_MAP.put("TextPane.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("TextPane.caretAspectRatio", "cursor-aspect-ratio");
+        CLASS_SPECIFIC_MAP.put("EditorPane.caretForeground", "cursor-color");
+        CLASS_SPECIFIC_MAP.put("EditorPane.caretAspectRatio", "cursor-aspect-ratio");
+
+        ICONS_MAP = new HashMap<String, GTKStockIcon>();
+        ICONS_MAP.put("FileChooser.cancelIcon", new GTKStockIcon("gtk-cancel", 4));
+        ICONS_MAP.put("FileChooser.okIcon",     new GTKStockIcon("gtk-ok",     4));
+        ICONS_MAP.put("OptionPane.errorIcon", new GTKStockIcon("gtk-dialog-error", 6));
+        ICONS_MAP.put("OptionPane.informationIcon", new GTKStockIcon("gtk-dialog-info", 6));
+        ICONS_MAP.put("OptionPane.warningIcon", new GTKStockIcon("gtk-dialog-warning", 6));
+        ICONS_MAP.put("OptionPane.questionIcon", new GTKStockIcon("gtk-dialog-question", 6));
+        ICONS_MAP.put("OptionPane.yesIcon", new GTKStockIcon("gtk-yes", 4));
+        ICONS_MAP.put("OptionPane.noIcon", new GTKStockIcon("gtk-no", 4));
+        ICONS_MAP.put("OptionPane.cancelIcon", new GTKStockIcon("gtk-cancel", 4));
+        ICONS_MAP.put("OptionPane.okIcon", new GTKStockIcon("gtk-ok", 4));
+    }
+}