/*

 * Copyright (c) 2002, 2013, 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

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 */

package javax.swing.plaf.synth;

import java.awt.*;

import java.beans.PropertyChangeEvent;

import java.beans.PropertyChangeListener;

import javax.swing.*;

import javax.swing.plaf.basic.BasicHTML;

import javax.swing.plaf.basic.BasicToolTipUI;

import javax.swing.plaf.ComponentUI;

import javax.swing.text.View;

/**

 * Provides the Synth L&F UI delegate for

 * {@link javax.swing.JToolTip}.

 *

 * @author Joshua Outwater

 * @since 1.7

 */

public class SynthToolTipUI extends BasicToolTipUI

                            implements PropertyChangeListener, SynthUI {

    private SynthStyle style;

    /**

     * Creates a new UI object for the given component.

     *

     * @param c component to create UI object for

     * @return the UI object

     */

    public static ComponentUI createUI(JComponent c) {

        return new SynthToolTipUI();

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installDefaults(JComponent c) {

        updateStyle(c);

    }

    private void updateStyle(JComponent c) {

        SynthContext context = getContext(c, ENABLED);

        style = SynthLookAndFeel.updateStyle(context, this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallDefaults(JComponent c) {

        SynthContext context = getContext(c, ENABLED);

        style.uninstallDefaults(context);

        style = null;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void installListeners(JComponent c) {

        c.addPropertyChangeListener(this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    protected void uninstallListeners(JComponent c) {

        c.removePropertyChangeListener(this);

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public SynthContext getContext(JComponent c) {

        return getContext(c, getComponentState(c));

    }

    private SynthContext getContext(JComponent c, int state) {

        return SynthContext.getContext(c, style, state);

    }

    private int getComponentState(JComponent c) {

        JComponent comp = ((JToolTip)c).getComponent();

        if (comp != null && !comp.isEnabled()) {

            return DISABLED;

        }

        return SynthLookAndFeel.getComponentState(c);

    }

    /**

     * Notifies this UI delegate to repaint the specified component.

     * This method paints the component background, then calls

     * the {@link #paint(SynthContext,Graphics)} method.

     *

     * <p>In general, this method does not need to be overridden by subclasses.

     * All Look and Feel rendering code should reside in the {@code paint} method.

     *

     * @param g the {@code Graphics} object used for painting

     * @param c the component being painted

     * @see #paint(SynthContext,Graphics)

     */

    @Override

    public void update(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);

        context.getPainter().paintToolTipBackground(context,

                          g, 0, 0, c.getWidth(), c.getHeight());

        paint(context, g);

    }

    /**

     * {@inheritDoc}

     */

    @Override

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

                            int y, int w, int h) {

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

    }

    /**

     * Paints the specified component according to the Look and Feel.

     * <p>This method is not used by Synth Look and Feel.

     * Painting is handled by the {@link #paint(SynthContext,Graphics)} method.

     *

     * @param g the {@code Graphics} object used for painting

     * @param c the component being painted

     * @see #paint(SynthContext,Graphics)

     */

    @Override

    public void paint(Graphics g, JComponent c) {

        SynthContext context = getContext(c);

        paint(context, g);

    }

    /**

     * Paints the specified component.

     *

     * @param context context for the component being painted

     * @param g the {@code Graphics} object used for painting

     * @see #update(Graphics,JComponent)

     */

    protected void paint(SynthContext context, Graphics g) {

        JToolTip tip = (JToolTip)context.getComponent();

        Insets insets = tip.getInsets();

        View v = (View)tip.getClientProperty(BasicHTML.propertyKey);

        if (v != null) {

            Rectangle paintTextR = new Rectangle(insets.left, insets.top,

                  tip.getWidth() - (insets.left + insets.right),

                  tip.getHeight() - (insets.top + insets.bottom));

            v.paint(g, paintTextR);

        } else {

            g.setColor(context.getStyle().getColor(context,

                                                   ColorType.TEXT_FOREGROUND));

            g.setFont(style.getFont(context));

            context.getStyle().getGraphicsUtils(context).paintText(

                context, g, tip.getTipText(), insets.left, insets.top, -1);

        }

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public Dimension getPreferredSize(JComponent c) {

        SynthContext context = getContext(c);

        Insets insets = c.getInsets();

        Dimension prefSize = new Dimension(insets.left+insets.right,

                                           insets.top+insets.bottom);

        String text = ((JToolTip)c).getTipText();

        if (text != null) {

            View v = (c != null) ? (View) c.getClientProperty("html") : null;

            if (v != null) {

                prefSize.width += (int) v.getPreferredSpan(View.X_AXIS);

                prefSize.height += (int) v.getPreferredSpan(View.Y_AXIS);

            } else {

                Font font = context.getStyle().getFont(context);

                FontMetrics fm = c.getFontMetrics(font);

                prefSize.width += context.getStyle().getGraphicsUtils(context).

                                  computeStringWidth(context, font, fm, text);

                prefSize.height += fm.getHeight();

            }

        }

        return prefSize;

    }

    /**

     * {@inheritDoc}

     */

    @Override

    public void propertyChange(PropertyChangeEvent e) {

        if (SynthLookAndFeel.shouldUpdateStyle(e)) {

            updateStyle((JToolTip)e.getSource());

        }

        String name = e.getPropertyName();

        if (name.equals("tiptext") || "font".equals(name) ||

                "foreground".equals(name)) {

            // remove the old html view client property if one

            // existed, and install a new one if the text installed

            // into the JLabel is html source.

            JToolTip tip = ((JToolTip) e.getSource());

            String text = tip.getTipText();

            BasicHTML.updateRenderer(tip, text);

        }

    }

}