gtklookandfeel.java

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/*
 * @(#)GTKLookAndFeel.java	1.106 06/11/30
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.sun.java.swing.plaf.gtk;

import sun.swing.SwingUtilities2;
import java.lang.ref.*;
import javax.swing.plaf.synth.*;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.io.File;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.HashMap;
import java.util.Locale;
import javax.swing.*;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.colorchooser.*;
import javax.swing.plaf.*;
import javax.swing.text.DefaultEditorKit;
import java.io.IOException;

import com.sun.java.swing.plaf.gtk.GTKConstants.PositionType;
import com.sun.java.swing.plaf.gtk.GTKConstants.StateType;
import sun.awt.SunToolkit;
import sun.security.action.GetPropertyAction;
import sun.swing.DefaultLayoutStyle;

/**
 * @version 1.106, 11/30/06
 * @author Scott Violet
 */
public class GTKLookAndFeel extends SynthLookAndFeel {
    private static final boolean IS_22;

    /**
     * Whether or not text is drawn antialiased.  This keys off the
     * desktop property 'gnome.Xft/Antialias' and 'gnome.Xft/RGBA'
     * We should assume ON - or some variation of ON as no GTK desktop
     * ships with it OFF.
     */
    static Object aaTextInfo;

    /**
     * Solaris, or Linux with Sun JDS in a CJK Locale.
     * Used to determine if Sun's high quality CJK fonts are present.
     */
    private static boolean isSunCJK;

    /*
     * Used to override if system (desktop) text anti-aliasing settings should
     * be used. The reasons for this are are is that currently its "off"
     * for CJK locales which is not likely to be a good universal answer, and
     * also its off for remote display. So this provides an unsupported
     * way to explicitly request that it be "on".
     */
    private static boolean gtkAAFontSettingsCond;

    /**
     * Font to use in places where there is no widget.
     */
    private Font fallbackFont;

    /**
     * If true, GTKLookAndFeel is inside the <code>initialize</code>
     * method.
     */
    private boolean inInitialize;
    

    /**
     * StyleFactory needs to be created only the first time.
     */
    private GTKStyleFactory styleFactory;
    
    /**
     * Cached theme name. Used by GTKGraphicsUtils
     */
    private static String gtkThemeName = "Default";

    static {
        // Backup for specifying the version, this isn't currently documented.
        // If you pass in anything but 2.2 you got the 2.0 colors/look.
        String version = (String)java.security.AccessController.doPrivileged(
               new GetPropertyAction("swing.gtk.version"));
        if (version != null) {
            IS_22 = version.equals("2.2");
        }
        else {
            IS_22 = true;
        }

        String language = Locale.getDefault().getLanguage();
        boolean cjkLocale =
            (Locale.CHINESE.getLanguage().equals(language) ||
             Locale.JAPANESE.getLanguage().equals(language) ||
             Locale.KOREAN.getLanguage().equals(language));

        if (cjkLocale) {
            boolean isSunDesktop = false;
            String osName = System.getProperty("os.name");
            if (osName != null) {
                if (osName.equals("SunOS")) {
                    isSunDesktop = true;
                } else if (osName.equals("Linux")) {
                    Boolean val =
                        (Boolean)java.security.AccessController.doPrivileged(
                            new java.security.PrivilegedAction() {
                                    public Object run() {
                                        File f = new File("/etc/sun-release");
                                        return Boolean.valueOf(f.exists());
                                    }
                                });
                    isSunDesktop = val.booleanValue();
                }
            }
            if (isSunDesktop) {
                isSunCJK = true;
            }
        }
    }

    /**
     * Returns true if running on system containing at least 2.2.
     */
    static boolean is2_2() {
        // NOTE: We're currently hard coding to use 2.2.
        // If we want to support both GTK 2.0 and 2.2, we'll
        // need to get the major/minor/micro version from the .so.
        // Refer to bug 4912613 for details.
        return IS_22;
    }

    /**
     * Maps a swing constant to a GTK constant.
     */
    static PositionType SwingOrientationConstantToGTK(int side) {
        switch (side) {
        case SwingConstants.LEFT:
            return PositionType.LEFT;
        case SwingConstants.RIGHT:
            return PositionType.RIGHT;
        case SwingConstants.TOP:
            return PositionType.TOP;
        case SwingConstants.BOTTOM:
            return PositionType.BOTTOM;
        }
        assert false : "Unknown orientation: " + side;
        return PositionType.TOP;
    }

    /**
     * Maps from Synth state to native GTK state using typesafe enumeration
     * StateType.  This is only used by the GTKNativeEngine.
     */
    static StateType synthStateToGTKStateType(int state) {
        StateType result;
        switch (state) {
            case SynthConstants.PRESSED:
                result = StateType.ACTIVE;
                break;
            case SynthConstants.MOUSE_OVER:
                result = StateType.PRELIGHT;
                break;
            case SynthConstants.SELECTED:
                result = StateType.SELECTED;
                break;
            case SynthConstants.DISABLED:
                result = StateType.INSENSITIVE;
                break;
            case SynthConstants.ENABLED:
            default: 
                result = StateType.NORMAL;
                break;
        }
        return result;
    }

    /**
     * Maps from a Synth state to the corresponding GTK state. 
     * The GTK states are named differently than Synth's states, the
     * following gives the mapping:
     * <table><tr><td>Synth<td>GTK
     * <tr><td>SynthConstants.PRESSED<td>ACTIVE
     * <tr><td>SynthConstants.SELECTED<td>SELECTED
     * <tr><td>SynthConstants.MOUSE_OVER<td>PRELIGHT
     * <tr><td>SynthConstants.DISABLED<td>INSENSITIVE
     * <tr><td>SynthConstants.ENABLED<td>NORMAL
     * </table>
     * Additionally some widgets are special cased.
     */
    static int synthStateToGTKState(Region region, int state) {
        if ((state & SynthConstants.PRESSED) != 0) {
            if (region == Region.RADIO_BUTTON
                    || region == Region.CHECK_BOX
                    || region == Region.MENU
                    || region == Region.MENU_ITEM
                    || region == Region.RADIO_BUTTON_MENU_ITEM
                    || region == Region.CHECK_BOX_MENU_ITEM
                    || region == Region.SPLIT_PANE) {
                state = SynthConstants.MOUSE_OVER;
            } else {
                state = SynthConstants.PRESSED;
            }

        } else if (region == Region.TABBED_PANE_TAB) {
            if ((state & SynthConstants.DISABLED) != 0) {
                state = SynthConstants.DISABLED;
            }
            else if ((state & SynthConstants.SELECTED) != 0) {
                state = SynthConstants.ENABLED;
            } else {
                state = SynthConstants.PRESSED;
            }
            
        } else if ((state & SynthConstants.SELECTED) != 0) {
            if (region == Region.MENU) {
                state = SynthConstants.MOUSE_OVER;
            } else if (region == Region.RADIO_BUTTON ||
                          region == Region.TOGGLE_BUTTON ||
                          region == Region.RADIO_BUTTON_MENU_ITEM ||
                          region == Region.CHECK_BOX_MENU_ITEM ||
                          region == Region.CHECK_BOX ||
                          region == Region.BUTTON) {
                if ((state & SynthConstants.DISABLED) != 0) {
                    state = SynthConstants.DISABLED;
                }
                // If the button is SELECTED and is PRELIGHT we need to
                // make the state MOUSE_OVER otherwise we don't paint the
                // PRELIGHT.
                else if ((state & SynthConstants.MOUSE_OVER) != 0) {
                    state = SynthConstants.MOUSE_OVER;
                } else {
                    state = SynthConstants.PRESSED;
                }
            } else {
                state = SynthConstants.SELECTED;
            }
        }

        else if ((state & SynthConstants.MOUSE_OVER) != 0) {
            state = SynthConstants.MOUSE_OVER;
        }
        else if ((state & SynthConstants.DISABLED) != 0) { 
            state = SynthConstants.DISABLED; 
        } 
        else {
            if (region == Region.SLIDER_TRACK) {
                state = SynthConstants.PRESSED;
            } else {
                state = SynthConstants.ENABLED;
            }
        }
        return state;
    }

    static boolean isText(Region region) {
        // These Regions treat FOREGROUND as TEXT.
        return (region == Region.TEXT_FIELD ||
                region == Region.FORMATTED_TEXT_FIELD ||
                region == Region.LIST ||
                region == Region.PASSWORD_FIELD ||
                region == Region.SPINNER ||
                region == Region.TABLE ||
                region == Region.TEXT_AREA ||
                region == Region.TEXT_FIELD ||
                region == Region.TEXT_PANE ||
                region == Region.TREE);
    }