/*

 * Copyright 2002-2006 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.util.*;

import javax.swing.plaf.synth.*;

import java.awt.*;

import java.awt.image.BufferedImage;

import java.lang.reflect.*;

import javax.swing.*;

import javax.swing.plaf.*;

import sun.swing.plaf.synth.*;

import com.sun.java.swing.plaf.gtk.GTKConstants.ArrowType;

import com.sun.java.swing.plaf.gtk.GTKConstants.ExpanderStyle;

import com.sun.java.swing.plaf.gtk.GTKConstants.Orientation;

import com.sun.java.swing.plaf.gtk.GTKConstants.ShadowType;

/**

 */

class GTKIconFactory {

    static final int CHECK_ICON_EXTRA_INSET        = 1;

    static final int DEFAULT_ICON_SPACING          = 2;

    static final int DEFAULT_ICON_SIZE             = 13;

    static final int DEFAULT_TOGGLE_MENU_ITEM_SIZE = 12; // For pre-gtk2.4

    private static final String RADIO_BUTTON_ICON    = "paintRadioButtonIcon";

    private static final String CHECK_BOX_ICON       = "paintCheckBoxIcon";

    private static final String MENU_ARROW_ICON      = "paintMenuArrowIcon";

    private static final String CHECK_BOX_MENU_ITEM_CHECK_ICON =

                                      "paintCheckBoxMenuItemCheckIcon";

    private static final String RADIO_BUTTON_MENU_ITEM_CHECK_ICON =

                                      "paintRadioButtonMenuItemCheckIcon";

    private static final String TREE_EXPANDED_ICON = "paintTreeExpandedIcon";

    private static final String TREE_COLLAPSED_ICON = "paintTreeCollapsedIcon";

    private static final String ASCENDING_SORT_ICON = "paintAscendingSortIcon";

    private static final String DESCENDING_SORT_ICON = "paintDescendingSortIcon";

    private static final String TOOL_BAR_HANDLE_ICON = "paintToolBarHandleIcon";

    private static Map<String, DelegatingIcon> iconsPool =

            Collections.synchronizedMap(new HashMap<String, DelegatingIcon>());

    private static DelegatingIcon getIcon(String methodName) {

        DelegatingIcon result = iconsPool.get(methodName);

        if (result == null) {

            if (methodName == TREE_COLLAPSED_ICON ||

                methodName == TREE_EXPANDED_ICON)

            {

                result = new SynthExpanderIcon(methodName);

            } else if (methodName == TOOL_BAR_HANDLE_ICON) {

                result = new ToolBarHandleIcon();

            } else if (methodName == MENU_ARROW_ICON) {

                result = new MenuArrowIcon();

            } else {

                result = new DelegatingIcon(methodName);

            }

            iconsPool.put(methodName, result);

        }

        return result;

    }

    //

    // Sort arrow

    //

    public static Icon getAscendingSortIcon() {

        return getIcon(ASCENDING_SORT_ICON);

    }

    public static Icon getDescendingSortIcon() {

        return getIcon(DESCENDING_SORT_ICON);

    }

    //

    // Tree methods

    //

    public static SynthIcon getTreeExpandedIcon() {

        return getIcon(TREE_EXPANDED_ICON);

    }

    public static SynthIcon getTreeCollapsedIcon() {

        return getIcon(TREE_COLLAPSED_ICON);

    }

    //

    // Radio button

    //

    public static SynthIcon getRadioButtonIcon() {

        return getIcon(RADIO_BUTTON_ICON);

    }

    //

    // CheckBox

    //

    public static SynthIcon getCheckBoxIcon() {

        return getIcon(CHECK_BOX_ICON);

    }

    //

    // Menus

    //

    public static SynthIcon getMenuArrowIcon() {

        return getIcon(MENU_ARROW_ICON);

    }

    public static SynthIcon getCheckBoxMenuItemCheckIcon() {

        return getIcon(CHECK_BOX_MENU_ITEM_CHECK_ICON);

    }

    public static SynthIcon getRadioButtonMenuItemCheckIcon() {

        return getIcon(RADIO_BUTTON_MENU_ITEM_CHECK_ICON);

    }

    //

    // ToolBar Handle

    //

    public static SynthIcon getToolBarHandleIcon() {

        return getIcon(TOOL_BAR_HANDLE_ICON);

    }

    static void resetIcons() {

        synchronized (iconsPool) {

            for (DelegatingIcon di: iconsPool.values()) {

                di.resetIconDimensions();

            }

        }

    }

    private static class DelegatingIcon extends SynthIcon implements

                                   UIResource {

        private static final Class[] PARAM_TYPES = new Class[] {

            SynthContext.class, Graphics.class, int.class,

            int.class, int.class, int.class, int.class

        };

        private Object method;

        int iconDimension = -1;

        DelegatingIcon(String methodName ){

            this.method = methodName;

        }

        public void paintIcon(SynthContext context, Graphics g,

                              int x, int y, int w, int h) {

            if (context != null) {

                GTKPainter.INSTANCE.paintIcon(context, g,

                        getMethod(), x, y, w, h);

            }

        }

        public int getIconWidth(SynthContext context) {

            return getIconDimension(context);

        }

        public int getIconHeight(SynthContext context) {

            return getIconDimension(context);

        }

        void resetIconDimensions() {

            iconDimension = -1;

        }

        protected Method getMethod() {

            if (method instanceof String) {

                method = resolveMethod((String)method);

            }

            return (Method)method;

        }

        protected Class[] getMethodParamTypes() {

            return PARAM_TYPES;

        }

        private Method resolveMethod(String name) {

            try {

                return GTKPainter.class.getMethod(name, getMethodParamTypes());

            } catch (NoSuchMethodException e) {

                assert false;

            }

            return null;

        }

        int getIconDimension(SynthContext context) {

            if (iconDimension >= 0) {

                return iconDimension;

            }

            if (context == null) {

                return DEFAULT_ICON_SIZE;

            }

            Region region = context.getRegion();

            GTKStyle style = (GTKStyle) context.getStyle();

            iconDimension = style.getClassSpecificIntValue(context,

                    "indicator-size",

                    (region == Region.CHECK_BOX_MENU_ITEM ||

                     region == Region.RADIO_BUTTON_MENU_ITEM) ?

                        DEFAULT_TOGGLE_MENU_ITEM_SIZE : DEFAULT_ICON_SIZE);

            if (region == Region.CHECK_BOX || region == Region.RADIO_BUTTON) {

                iconDimension += 2 * style.getClassSpecificIntValue(context,

                        "indicator-spacing", DEFAULT_ICON_SPACING);

            } else if (region == Region.CHECK_BOX_MENU_ITEM ||

                       region == Region.RADIO_BUTTON_MENU_ITEM) {

                iconDimension += 2 * CHECK_ICON_EXTRA_INSET;

            }

            return iconDimension;

        }

    }

    private static class SynthExpanderIcon extends DelegatingIcon {

        SynthExpanderIcon(String method) {

            super(method);

        }

        public void paintIcon(SynthContext context, Graphics g, int x, int y,

                              int w, int h) {

            if (context != null) {

                super.paintIcon(context, g, x, y, w, h);

                updateSizeIfNecessary(context);

            }

        }

        int getIconDimension(SynthContext context) {

            updateSizeIfNecessary(context);

            return (iconDimension == -1) ? DEFAULT_ICON_SIZE :

                                           iconDimension;

        }

        private void updateSizeIfNecessary(SynthContext context) {

            if (iconDimension == -1 && context != null) {

                iconDimension = context.getStyle().getInt(context,

                        "Tree.expanderSize", 10);

            }

        }

    }

    // GTK has a separate widget for the handle box, to mirror this

    // we create a unique icon per ToolBar and lookup the style for the

    // HandleBox.

    private static class ToolBarHandleIcon extends DelegatingIcon {

        private static final Class[] PARAM_TYPES = new Class[] {

            SynthContext.class, Graphics.class, int.class,

            int.class, int.class, int.class, int.class, Orientation.class,

        };

        private SynthStyle style;

        public ToolBarHandleIcon() {

            super(TOOL_BAR_HANDLE_ICON);

        }

        protected Class[] getMethodParamTypes() {

            return PARAM_TYPES;

        }

        public void paintIcon(SynthContext context, Graphics g, int x, int y,

                              int w, int h) {

            }

        }

        public int getIconWidth(SynthContext context) {

            if (context == null) {

                return 10;

            }

            if (((JToolBar)context.getComponent()).getOrientation() ==

                    JToolBar.HORIZONTAL) {

                return 10;

            } else {

                return context.getComponent().getWidth();

            }

        }

        public int getIconHeight(SynthContext context) {

            if (context == null) {

                return 10;

            }

            if (((JToolBar)context.getComponent()).getOrientation() ==

                    JToolBar.HORIZONTAL) {

                return context.getComponent().getHeight();

            } else {

                return 10;

            }

        }

    }

    private static class MenuArrowIcon extends DelegatingIcon {

        private static final Class[] PARAM_TYPES = new Class[] {

            SynthContext.class, Graphics.class, int.class,

            int.class, int.class, int.class, int.class, ArrowType.class,

        };

        public MenuArrowIcon() {

            super(MENU_ARROW_ICON);

        }

        protected Class[] getMethodParamTypes() {

            return PARAM_TYPES;

        }

        public void paintIcon(SynthContext context, Graphics g, int x, int y,

                              int w, int h) {

            }

        }

    }

}