/*

 * 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.plaf.synth;

import javax.swing.*;

import javax.swing.text.*;

import javax.swing.plaf.*;

import java.beans.PropertyChangeEvent;

import java.awt.*;

/**

 * Provides the look and feel for a styled text editor in the

 * Synth look and feel.

 * <p>

 * <strong>Warning:</strong>

 * Serialized objects of this class will not be compatible with

 * future Swing releases. The current serialization support is

 * appropriate for short term storage or RMI between applications running

 * the same version of Swing.  As of 1.4, support for long term storage

 * of all JavaBeans<sup><font size="-2">TM</font></sup>

 * has been added to the <code>java.beans</code> package.

 * Please see {@link java.beans.XMLEncoder}.

 *

 * @author  Shannon Hickey

 * @since 1.7

 */

public class SynthTextPaneUI extends SynthEditorPaneUI {

    /**

     * Creates a UI for the JTextPane.

     *

     * @param c the JTextPane object

     * @return the UI object

     */

    public static ComponentUI createUI(JComponent c) {

        return new SynthTextPaneUI();

    }

    /**

     * Fetches the name used as a key to lookup properties through the

     * UIManager.  This is used as a prefix to all the standard

     * text properties.

     *

     * @return the name ("TextPane")

     */

    @Override

    protected String getPropertyPrefix() {

        return "TextPane";

    }

    /**

     * Installs the UI for a component.  This does the following

     * things.

     * <ol>

     * <li>

     * Sets opaqueness of the associated component according to its style,

     * if the opaque property has not already been set by the client program.

     * <li>

     * Installs the default caret and highlighter into the

     * associated component. These properties are only set if their

     * current value is either {@code null} or an instance of

     * {@link UIResource}.

     * <li>

     * Attaches to the editor and model.  If there is no

     * model, a default one is created.

     * <li>

     * Creates the view factory and the view hierarchy used

     * to represent the model.

     * </ol>

     *

     * @param c the editor component

     * @see BasicTextUI#installUI

     * @see ComponentUI#installUI

     */

    @Override

    public void installUI(JComponent c) {

        super.installUI(c);

        updateForeground(c.getForeground());

        updateFont(c.getFont());

    }

    /**

     * This method gets called when a bound property is changed

     * on the associated JTextComponent.  This is a hook

     * which UI implementations may change to reflect how the

     * UI displays bound properties of JTextComponent subclasses.

     * If the font, foreground or document has changed, the

     * the appropriate property is set in the default style of

     * the document.

     *

     * @param evt the property change event

     */

    @Override

    protected void propertyChange(PropertyChangeEvent evt) {

        super.propertyChange(evt);

        String name = evt.getPropertyName();

        if (name.equals("foreground")) {

            updateForeground((Color)evt.getNewValue());

        } else if (name.equals("font")) {

            updateFont((Font)evt.getNewValue());

        } else if (name.equals("document")) {

            JComponent comp = getComponent();

            updateForeground(comp.getForeground());

            updateFont(comp.getFont());

        }

    }

    /**

     * Update the color in the default style of the document.

     *

     * @param color the new color to use or null to remove the color attribute

     *              from the document's style

     */

    private void updateForeground(Color color) {

        StyledDocument doc = (StyledDocument)getComponent().getDocument();

        Style style = doc.getStyle(StyleContext.DEFAULT_STYLE);

        if (style == null) {

            return;

        }

        if (color == null) {

            style.removeAttribute(StyleConstants.Foreground);

        } else {

            StyleConstants.setForeground(style, color);

        }

    }

    /**

     * Update the font in the default style of the document.

     *

     * @param font the new font to use or null to remove the font attribute

     *             from the document's style

     */

    private void updateFont(Font font) {

        StyledDocument doc = (StyledDocument)getComponent().getDocument();

        Style style = doc.getStyle(StyleContext.DEFAULT_STYLE);

        if (style == null) {

            return;

        }

        if (font == null) {

            style.removeAttribute(StyleConstants.FontFamily);

            style.removeAttribute(StyleConstants.FontSize);

            style.removeAttribute(StyleConstants.Bold);

            style.removeAttribute(StyleConstants.Italic);

        } else {

            StyleConstants.setFontFamily(style, font.getName());

            StyleConstants.setFontSize(style, font.getSize());

            StyleConstants.setBold(style, font.isBold());

            StyleConstants.setItalic(style, font.isItalic());

        }

    }

    @Override

    void paintBackground(SynthContext context, Graphics g, JComponent c) {

        context.getPainter().paintTextPaneBackground(context, g, 0, 0,

                                                  c.getWidth(), c.getHeight());

    }

    /**

     * @inheritDoc

     */

    @Override

    public void paintBorder(SynthContext context, Graphics g, int x,

                            int y, int w, int h) {

        context.getPainter().paintTextPaneBorder(context, g, x, y, w, h);

    }

}