/*

 * Copyright (c) 2004, 2012, 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 sun.tools.jconsole;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.plaf.*;

import javax.swing.plaf.basic.BasicGraphicsUtils;

import static javax.swing.SwingConstants.*;

import static sun.tools.jconsole.JConsole.*;

@SuppressWarnings("serial")

public class BorderedComponent extends JPanel implements ActionListener {

    JButton moreOrLessButton;

    String valueLabelStr;

    JLabel label;

    JComponent comp;

    boolean collapsed = false;

    private Icon collapseIcon;

    private Icon expandIcon;

    private static Image getImage(String name) {

        Toolkit tk = Toolkit.getDefaultToolkit();

        name = "resources/" + name + ".png";

        return tk.getImage(BorderedComponent.class.getResource(name));

    }

    public BorderedComponent(String text) {

        this(text, null, false);

    }

    public BorderedComponent(String text, JComponent comp) {

        this(text, comp, false);

    }

    public BorderedComponent(String text, JComponent comp, boolean collapsible) {

        super(null);

        this.comp = comp;

        // Only add border if text is not null

        if (text != null) {

            TitledBorder border;

            if (collapsible) {

                final JLabel textLabel = new JLabel(text);

                JPanel borderLabel = new JPanel(new FlowLayout(FlowLayout.LEFT, 2, 0)) {

                    public int getBaseline(int w, int h) {

                        Dimension dim = textLabel.getPreferredSize();

                        return textLabel.getBaseline(dim.width, dim.height) + textLabel.getY();

                    }

                };

                borderLabel.add(textLabel);

                border = new LabeledBorder(borderLabel);

                textLabel.setForeground(border.getTitleColor());

                if (IS_WIN) {

                    collapseIcon = new ImageIcon(getImage("collapse-winlf"));

                    expandIcon = new ImageIcon(getImage("expand-winlf"));

                } else {

                    collapseIcon = new ArrowIcon(SOUTH, textLabel);

                    expandIcon = new ArrowIcon(EAST, textLabel);

                }

                moreOrLessButton = new JButton(collapseIcon);

                moreOrLessButton.setContentAreaFilled(false);

                moreOrLessButton.setBorderPainted(false);

                moreOrLessButton.setMargin(new Insets(0, 0, 0, 0));

                moreOrLessButton.addActionListener(this);

                String toolTip =

                    Messages.BORDERED_COMPONENT_MORE_OR_LESS_BUTTON_TOOLTIP;

                moreOrLessButton.setToolTipText(toolTip);

                borderLabel.add(moreOrLessButton);

                borderLabel.setSize(borderLabel.getPreferredSize());

                add(borderLabel);

            } else {

                border = new TitledBorder(text);

            }

            setBorder(new CompoundBorder(new FocusBorder(this), border));

        } else {

            setBorder(new FocusBorder(this));

        }

        if (comp != null) {

            add(comp);

        }

    }

    public void setComponent(JComponent comp) {

        if (this.comp != null) {

            remove(this.comp);

        }

        this.comp = comp;

        if (!collapsed) {

            LayoutManager lm = getLayout();

            if (lm instanceof BorderLayout) {

                add(comp, BorderLayout.CENTER);

            } else {

                add(comp);

            }

        }

        revalidate();

    }

    public void setValueLabel(String str) {

        this.valueLabelStr = str;

        if (label != null) {

            label.setText(Resources.format(Messages.CURRENT_VALUE,

                                           valueLabelStr));

        }

    }

    public void actionPerformed(ActionEvent ev) {

        if (collapsed) {

            if (label != null) {

                remove(label);

            }

            add(comp);

            moreOrLessButton.setIcon(collapseIcon);

        } else {

            remove(comp);

            if (valueLabelStr != null) {

                if (label == null) {

                    label = new JLabel(Resources.format(Messages.CURRENT_VALUE,

                                                        valueLabelStr));

                }

                add(label);

            }

            moreOrLessButton.setIcon(expandIcon);

        }

        collapsed = !collapsed;

        JComponent container = (JComponent)getParent();

        if (container != null &&

            container.getLayout() instanceof VariableGridLayout) {

            ((VariableGridLayout)container.getLayout()).setFillRow(this, !collapsed);

            container.revalidate();

        }

    }

    public Dimension getMinimumSize() {

        if (getLayout() != null) {

            // A layout manager has been set, so delegate to it

            return super.getMinimumSize();

        }

        if (moreOrLessButton != null) {

            Dimension d = moreOrLessButton.getMinimumSize();

            Insets i = getInsets();

            d.width  += i.left + i.right;

            d.height += i.top + i.bottom;

            return d;

        } else {

            return super.getMinimumSize();

        }

    }

    public void doLayout() {

        if (getLayout() != null) {

            // A layout manager has been set, so delegate to it

            super.doLayout();

            return;

        }

        Dimension d = getSize();

        Insets i = getInsets();

        if (collapsed) {

            if (label != null) {

                Dimension p = label.getPreferredSize();

                label.setBounds(i.left,

                                i.top + (d.height - i.top - i.bottom - p.height) / 2,

                                p.width,

                                p.height);

            }

        } else {

            if (comp != null) {

                comp.setBounds(i.left,

                               i.top,

                               d.width - i.left - i.right,

                               d.height - i.top - i.bottom);

            }

        }

    }

    private static class ArrowIcon implements Icon {

        private int direction;

        private JLabel textLabel;

        public ArrowIcon(int direction, JLabel textLabel) {

            this.direction = direction;

            this.textLabel = textLabel;

        }

        public void paintIcon(Component c, Graphics g, int x, int y) {

            int w = getIconWidth();

            int h = w;

            Polygon p = new Polygon();

            switch (direction) {

              case EAST:

                p.addPoint(x + 2,     y);

                p.addPoint(x + w - 2, y + h / 2);

                p.addPoint(x + 2,     y + h - 1);

                break;

              case SOUTH:

                p.addPoint(x,         y + 2);

                p.addPoint(x + w / 2, y + h - 2);

                p.addPoint(x + w - 1, y + 2);

                break;

            }

            g.fillPolygon(p);

        }

        public int getIconWidth() {

            return getIconHeight();

        }

        public int getIconHeight() {

            Graphics g = textLabel.getGraphics();

            if (g != null) {

                int h = g.getFontMetrics(textLabel.getFont()).getAscent() * 6/10;

                if (h % 2 == 0) {

                    h += 1;     // Make it odd

                }

                return h;

            } else {

                return 7;

            }

        }

    }

    /**

     * A subclass of <code>TitledBorder</code> which implements an arbitrary border

     * with the addition of a JComponent (JLabel, JPanel, etc) in the

     * default position.

     * <p>

     * If the border property value is not

     * specified in the constructor or by invoking the appropriate

     * set method, the property value will be defined by the current

     * look and feel, using the following property name in the

     * Defaults Table:

     * <ul>

     * <li>&quot;TitledBorder.border&quot;

     * </ul>

     */

    protected static class LabeledBorder extends TitledBorder {

        protected JComponent label;

        private Point compLoc = new Point();

        /**

         * Creates a LabeledBorder instance.

         *

         * @param label  the label the border should display

         */

        public LabeledBorder(JComponent label)     {

            this(null, label);

        }

        /**

         * Creates a LabeledBorder instance with the specified border

         * and an empty label.

         *

         * @param border  the border

         */

        public LabeledBorder(Border border)       {

            this(border, null);

        }

        /**

         * Creates a LabeledBorder instance with the specified border and

         * label.

         *

         * @param border  the border

         * @param label  the label the border should display

         */

        public LabeledBorder(Border border, JComponent label) {

            super(border);

            this.label = label;

            if (label instanceof JLabel &&

                label.getForeground() instanceof ColorUIResource) {

                label.setForeground(getTitleColor());

            }

        }

        /**

         * Paints the border for the specified component with the

         * specified position and size.

         * @param c the component for which this border is being painted

         * @param g the paint graphics

         * @param x the x position of the painted border

         * @param y the y position of the painted border

         * @param width the width of the painted border

         * @param height the height of the painted border

         */

        public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {

            Border border = getBorder();

            if (label == null) {

                if (border != null) {

                    border.paintBorder(c, g, x, y, width, height);

                }

                return;

            }

            Rectangle grooveRect = new Rectangle(x + EDGE_SPACING, y + EDGE_SPACING,

                                                 width - (EDGE_SPACING * 2),

                                                 height - (EDGE_SPACING * 2));

            Dimension   labelDim = label.getPreferredSize();

            int baseline = label.getBaseline(labelDim.width, labelDim.height);

            int         ascent = Math.max(0, baseline);

            int         descent = labelDim.height - ascent;

            int         diff;

            Insets      insets;

            if (border != null) {

                insets = border.getBorderInsets(c);

            } else {

                insets = new Insets(0, 0, 0, 0);

            }

            diff = Math.max(0, ascent/2 + TEXT_SPACING - EDGE_SPACING);

            grooveRect.y += diff;

            grooveRect.height -= diff;

            compLoc.y = grooveRect.y + insets.top/2 - (ascent + descent) / 2 - 1;

            int justification;

            if (c.getComponentOrientation().isLeftToRight()) {

                justification = LEFT;

            } else {

                justification = RIGHT;

            }

            switch (justification) {

                case LEFT:

                    compLoc.x = grooveRect.x + TEXT_INSET_H + insets.left;

                    break;

                case RIGHT:

                    compLoc.x = (grooveRect.x + grooveRect.width

                                 - (labelDim.width + TEXT_INSET_H + insets.right));

                    break;

            }

            // If title is positioned in middle of border AND its fontsize

            // is greater than the border's thickness, we'll need to paint

            // the border in sections to leave space for the component's background

            // to show through the title.

            //

            if (border != null) {

                if (grooveRect.y > compLoc.y - ascent) {

                    Rectangle clipRect = new Rectangle();

                    // save original clip

                    Rectangle saveClip = g.getClipBounds();

                    // paint strip left of text

                    clipRect.setBounds(saveClip);

                    if (computeIntersection(clipRect, x, y, compLoc.x-1-x, height)) {

                        g.setClip(clipRect);

                        border.paintBorder(c, g, grooveRect.x, grooveRect.y,

                                      grooveRect.width, grooveRect.height);

                    }

                    // paint strip right of text

                    clipRect.setBounds(saveClip);

                    if (computeIntersection(clipRect, compLoc.x+ labelDim.width +1, y,

                                   x+width-(compLoc.x+ labelDim.width +1), height)) {

                        g.setClip(clipRect);

                        border.paintBorder(c, g, grooveRect.x, grooveRect.y,

                                      grooveRect.width, grooveRect.height);

                    }

                    // paint strip below text

                    clipRect.setBounds(saveClip);

                    if (computeIntersection(clipRect,

                                            compLoc.x - 1, compLoc.y + ascent + descent,

                                            labelDim.width + 2,

                                            y + height - compLoc.y - ascent - descent)) {

                        g.setClip(clipRect);

                        border.paintBorder(c, g, grooveRect.x, grooveRect.y,

                                  grooveRect.width, grooveRect.height);

                    }

                    // restore clip

                    g.setClip(saveClip);

                } else {

                    border.paintBorder(c, g, grooveRect.x, grooveRect.y,

                                      grooveRect.width, grooveRect.height);

                }

                label.setLocation(compLoc);

                label.setSize(labelDim);

            }

        }

        /**

         * Reinitialize the insets parameter with this Border's current Insets.

         * @param c the component for which this border insets value applies

         * @param insets the object to be reinitialized

         */

        public Insets getBorderInsets(Component c, Insets insets) {

            Border border = getBorder();

            if (border != null) {

                if (border instanceof AbstractBorder) {

                    ((AbstractBorder)border).getBorderInsets(c, insets);

                } else {

                    // Can't reuse border insets because the Border interface

                    // can't be enhanced.

                    Insets i = border.getBorderInsets(c);

                    insets.top = i.top;

                    insets.right = i.right;

                    insets.bottom = i.bottom;

                    insets.left = i.left;

                }

            } else {

                insets.left = insets.top = insets.right = insets.bottom = 0;

            }

            insets.left += EDGE_SPACING + TEXT_SPACING;

            insets.right += EDGE_SPACING + TEXT_SPACING;

            insets.top += EDGE_SPACING + TEXT_SPACING;

            insets.bottom += EDGE_SPACING + TEXT_SPACING;

            if (c == null || label == null) {

                return insets;

            }

            insets.top += label.getHeight();

            return insets;

        }

        /**

         * Returns the label of the labeled border.

         */

        public JComponent getLabel() {

            return label;

        }

        /**

         * Sets the title of the titled border.

         * param title the title for the border

         */

        public void setLabel(JComponent label) {

            this.label = label;

        }

        /**

         * Returns the minimum dimensions this border requires

         * in order to fully display the border and title.

         * @param c the component where this border will be drawn

         */

        public Dimension getMinimumSize(Component c) {

            Insets insets = getBorderInsets(c);

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

                                              insets.top + insets.bottom);

            minSize.width += label.getWidth();

            return minSize;

        }

        private static boolean computeIntersection(Rectangle dest,

                                                   int rx, int ry, int rw, int rh) {

            int x1 = Math.max(rx, dest.x);

            int x2 = Math.min(rx + rw, dest.x + dest.width);

            int y1 = Math.max(ry, dest.y);

            int y2 = Math.min(ry + rh, dest.y + dest.height);

            dest.x = x1;

            dest.y = y1;

            dest.width = x2 - x1;

            dest.height = y2 - y1;

            if (dest.width <= 0 || dest.height <= 0) {

                return false;

            }

            return true;

        }

    }

    protected static class FocusBorder extends AbstractBorder implements FocusListener {

        private Component comp;

        private Color focusColor;

        private boolean focusLostTemporarily = false;