/*

 * 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.*;

/**

 * CommentView subclasses HiddenTagView to contain a JTextArea showing

 * a comment. When the textarea is edited the comment is

 * reset. As this inherits from EditableView if the JTextComponent is

 * not editable, the textarea will not be visible.

 *

 * @author  Scott Violet

 */

class CommentView extends HiddenTagView {

    CommentView(Element e) {

        super(e);

    }

    protected Component createComponent() {

        Container host = getContainer();

        if (host != null && !((JTextComponent)host).isEditable()) {

            return null;

        }

        JTextArea ta = new JTextArea(getRepresentedText());

        Document doc = getDocument();

        Font font;

        if (doc instanceof StyledDocument) {

            font = ((StyledDocument)doc).getFont(getAttributes());

            ta.setFont(font);

        }

        else {

            font = ta.getFont();

        }

        updateYAlign(font);

        ta.setBorder(CBorder);

        ta.getDocument().addDocumentListener(this);

        ta.setFocusable(isVisible());

        return ta;

    }

    void resetBorder() {

    }

    /**

     * This is subclassed to put the text on the Comment attribute of

     * the Element's AttributeSet.

     */

    void _updateModelFromText() {

        JTextComponent textC = getTextComponent();

        Document doc = getDocument();

        if (textC != null && doc != null) {

            String text = textC.getText();

            SimpleAttributeSet sas = new SimpleAttributeSet();

            isSettingAttributes = true;

            try {

                sas.addAttribute(HTML.Attribute.COMMENT, text);

                ((StyledDocument)doc).setCharacterAttributes

                    (getStartOffset(), getEndOffset() -

                     getStartOffset(), sas, false);

            }

            finally {

                isSettingAttributes = false;

            }

        }

    }

    JTextComponent getTextComponent() {

        return (JTextComponent)getComponent();

    }

    String getRepresentedText() {

        AttributeSet as = getElement().getAttributes();

        if (as != null) {

            Object comment = as.getAttribute(HTML.Attribute.COMMENT);

            if (comment instanceof String) {

                return (String)comment;

            }

        }

        return "";

    }

    static final Border CBorder = new CommentBorder();

    static final int commentPadding = 3;

    static final int commentPaddingD = commentPadding * 3;

    static class CommentBorder extends LineBorder {

        CommentBorder() {

            super(Color.black, 1);

        }

        public void paintBorder(Component c, Graphics g, int x, int y,

                                int width, int height) {

            super.paintBorder(c, g, x + commentPadding, y,

                              width - commentPaddingD, height);

        }

        public Insets getBorderInsets(Component c, Insets insets) {

            Insets retI = super.getBorderInsets(c, insets);

            retI.left += commentPadding;

            retI.right += commentPadding;

            return retI;

        }

        public boolean isBorderOpaque() {

            return false;

        }

    } // End of class CommentView.CommentBorder

} // End of CommentView