org.pushingpixels.radiance.component.internal.ui.ribbon.SequentialFocusTraversalPolicy Maven / Gradle / Ivy

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/*
 * Copyright (c) 2005-2021 Radiance Kirill Grouchnikov. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  o Neither the name of the copyright holder nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.pushingpixels.radiance.component.internal.ui.ribbon;

import java.awt.*;
import java.util.ArrayList;
import java.util.List;

public class SequentialFocusTraversalPolicy extends FocusTraversalPolicy {
    private List componentSequence = new ArrayList<>();

    public SequentialFocusTraversalPolicy(List componentSequence) {
        this.componentSequence.addAll(componentSequence);
    }

    @Override
    public Component getFirstComponent(Container container) {
        for (int index = 0; index < this.componentSequence.size(); index++) {
            Component curr = this.componentSequence.get(index);
            if (curr.isEnabled() && curr.isFocusable() && curr.isVisible()) {
                return curr;
            }
        }
        return null;
    }

    @Override
    public Component getLastComponent(Container container) {
        for (int index = this.componentSequence.size() - 1; index >= 0; index--) {
            Component curr = this.componentSequence.get(index);
            if (curr.isEnabled() && curr.isFocusable() && curr.isVisible()) {
                return curr;
            }
        }
        return null;
    }

    @Override
    public Component getDefaultComponent(Container container) {
        return this.getFirstComponent(container);
    }

    @Override
    public Component getComponentAfter(Container container, Component component) {
        int startIndex = this.componentSequence.indexOf(component) + 1;
        if (startIndex == this.componentSequence.size()) {
            return null;
        }
        for (int index = startIndex; index < this.componentSequence.size(); index++) {
            Component curr = this.componentSequence.get(index);
            if (curr.isEnabled() && curr.isFocusable() && curr.isVisible()) {
                return curr;
            }
        }
        return null;
    }

    @Override
    public Component getComponentBefore(Container container, Component component) {
        int startIndex = this.componentSequence.indexOf(component) - 1;
        if (startIndex == -1) {
            return null;
        }

        for (int index = startIndex; index >= 0; index--) {
            Component curr = this.componentSequence.get(index);
            if (curr.isEnabled() && curr.isFocusable() && curr.isVisible()) {
                return curr;
            }
        }
        return null;
    }
}