/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2025 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kse.gui;

import java.awt.Component;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.event.MouseAdapter;

import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JFrame;

/**
 * Cursor utility methods.
 */
public class CursorUtil {
    private CursorUtil() {
    }

    /**
     * Set cursor to busy and disable application input. This can be reversed by
     * a subsequent call to setCursorFree.
     *
     * @param frame Frame to apply to
     */
    public static void setCursorBusy(JFrame frame) {
        setCursorBusy(frame.getRootPane().getGlassPane());
    }

    /**
     * Set cursor to free and enable application input. Called after a call to
     * setCursorBusy.
     *
     * @param frame Frame to apply to
     */
    public static void setCursorFree(JFrame frame) {
        setCursorFree(frame.getRootPane().getGlassPane());
    }

    /**
     * Set cursor to busy and disable application input. This can be reversed by
     * a subsequent call to setCursorFree.
     *
     * @param component Component within container to apply to
     */
    public static void setCursorBusy(JComponent component) {
        JDialog dialog = findContainingDialog(component);

        if (dialog != null) {
            setCursorBusy(dialog);
        } else {
            JFrame frame = findContainingFrame(component);

            if (frame != null) {
                setCursorBusy(frame);
            }
        }
    }

    /**
     * Set cursor to free and enable application input. Called after a call to
     * setCursorBusy.
     *
     * @param component Component within container to apply to
     */
    public static void setCursorFree(JComponent component) {
        JDialog dialog = findContainingDialog(component);

        if (dialog != null) {
            setCursorFree(dialog);
        } else {
            JFrame frame = findContainingFrame(component);

            if (frame != null) {
                setCursorFree(frame);
            }
        }
    }

    private static JDialog findContainingDialog(JComponent component) {
        Container container = component.getParent();

        while (container != null) {
            if (container instanceof JDialog) {
                return (JDialog) container;
            }

            container = container.getParent();
        }

        return null;
    }

    private static JFrame findContainingFrame(JComponent component) {
        Container container = component.getParent();

        while (container != null) {
            if (container instanceof JFrame) {
                return (JFrame) container;
            }

            container = container.getParent();
        }

        return null;
    }

    /**
     * Set cursor to busy and disable application input. This can be reversed by
     * a subsequent call to setCursorFree.
     *
     * @param dialog Dialog to apply to
     */
    public static void setCursorBusy(JDialog dialog) {
        setCursorBusy(dialog.getRootPane().getGlassPane());
    }

    /**
     * Set cursor to free and enable application input. Called after a call to
     * setCursorBusy.
     *
     * @param dialog Dialog to apply to
     */
    public static void setCursorFree(JDialog dialog) {
        setCursorFree(dialog.getRootPane().getGlassPane());
    }

    private static void setCursorBusy(Component glassPane) {
        glassPane.addMouseListener(new MouseAdapter() {});
        glassPane.setVisible(true);

        glassPane.setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
    }

    private static void setCursorFree(Component glassPane) {
        glassPane.setVisible(false);

        glassPane.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
    }
}
