/*

 * Copyright (c) 1998, 2004, Oracle and/or its affiliates. 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package javax.swing.text.html;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.net.MalformedURLException;

import java.net.URL;

import javax.swing.text.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.event.*;

import java.util.*;

/**

 * EditableView sets the view it contains to be visible only when the

 * JTextComponent the view is contained in is editable. The min/pref/max

 * size is 0 when not visible.

 *

 * @author  Scott Violet

 */

class EditableView extends ComponentView {

    EditableView(Element e) {

        super(e);

    }

    public float getMinimumSpan(int axis) {

        if (isVisible) {

            return super.getMinimumSpan(axis);

        }

        return 0;

    }

    public float getPreferredSpan(int axis) {

        if (isVisible) {

            return super.getPreferredSpan(axis);

        }

        return 0;

    }

    public float getMaximumSpan(int axis) {

        if (isVisible) {

            return super.getMaximumSpan(axis);

        }

        return 0;

    }

    public void paint(Graphics g, Shape allocation) {

        Component c = getComponent();

        Container host = getContainer();

        if (host instanceof JTextComponent &&

            isVisible != ((JTextComponent)host).isEditable()) {

            isVisible = ((JTextComponent)host).isEditable();

            preferenceChanged(null, true, true);

            host.repaint();

        }

        /*

         * Note: we cannot tweak the visible state of the

         * component in createComponent() even though it

         * gets called after the setParent() call where

         * the value of the boolean is set.  This

         * because, the setComponentParent() in the

         * superclass, always does a setVisible(false)

         * after calling createComponent().   We therefore

         * use this flag in the paint() method to

         * setVisible() to true if required.

         */

        if (isVisible) {

            super.paint(g, allocation);

        }

        else {

            setSize(0, 0);

        }

        if (c != null) {

            c.setFocusable(isVisible);

        }

    }

    public void setParent(View parent) {

        if (parent != null) {

            Container host = parent.getContainer();

            if (host != null) {

                if (host instanceof JTextComponent) {

                    isVisible = ((JTextComponent)host).isEditable();

                } else {

                    isVisible = false;

                }

            }

        }

        super.setParent(parent);

    }

    /**

     * @return true if the Component is visible.

     */

    public boolean isVisible() {

        return isVisible;

    }

    /** Set to true if the component is visible. This is based off the

     * editability of the container. */

    private boolean isVisible;

} // End of EditableView