/*

 * Copyright (c) 2016, 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.

 *

 * 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.

 */

import java.awt.Color;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.util.HashMap;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.TimeUnit;

import javax.swing.JButton;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextPane;

import javax.swing.JViewport;

import javax.swing.SwingUtilities;

import javax.swing.UIManager;

import javax.swing.text.BadLocationException;

import javax.swing.text.DefaultStyledDocument;

import javax.swing.text.Style;

import javax.swing.text.StyleConstants;

import javax.swing.text.StyleContext;

/*

 * @test

 * @bug 8164032 8156217

 * @summary JViewport backing store image is not scaled on HiDPI display

 * @run main/manual JViewPortBackingStoreImageTest

 */

public class JViewPortBackingStoreImageTest {

    private static volatile boolean testResult = false;

    private static volatile CountDownLatch countDownLatch;

    private static final String INSTRUCTIONS = "INSTRUCTIONS:\n\n"

            + "Verify text is drawn with high resolution and text selection "

            + "is not shifted when JViewPort is used on HiDPI display.\n\n"

            + "If the display does not support HiDPI mode press PASS.\n\n"

            + "1. Check that the text does not have low resolution.\n"

            + "If no, press FAIL.\n\n"

            + "2. Select the current text from the end to the beginning.\n"

            + "\n"

            + "If the text is slightly shiftted from one side to another\n"

            + "and back during selection press Fail.\n"

            + "Otherwise, press Pass.";

    private static DefaultStyledDocument doc;

    private static StyleContext styles;

    private static HashMap<String, Style> contentAttributes;

    public static void main(String args[]) throws Exception {

        countDownLatch = new CountDownLatch(1);

        SwingUtilities.invokeLater(JViewPortBackingStoreImageTest::createUI);

        countDownLatch.await(15, TimeUnit.MINUTES);

        if (!testResult) {

            throw new RuntimeException("Test fails!");

        }

    }

    private static void createUI() {

        try {

            UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

        final JFrame mainFrame = new JFrame();

        GridBagLayout layout = new GridBagLayout();

        JPanel mainControlPanel = new JPanel(layout);

        JPanel resultButtonPanel = new JPanel(layout);

        GridBagConstraints gbc = new GridBagConstraints();

        gbc.gridx = 0;

        gbc.gridy = 0;

        gbc.insets = new Insets(5, 15, 5, 15);

        gbc.fill = GridBagConstraints.HORIZONTAL;

        mainControlPanel.add(createComponent(), gbc);

        JTextArea instructionTextArea = new JTextArea();

        instructionTextArea.setText(INSTRUCTIONS);

        instructionTextArea.setEditable(false);

        instructionTextArea.setBackground(Color.white);

        gbc.gridx = 0;

        gbc.gridy = 1;

        gbc.fill = GridBagConstraints.HORIZONTAL;

        mainControlPanel.add(instructionTextArea, gbc);

        JButton passButton = new JButton("Pass");

        passButton.setActionCommand("Pass");

        passButton.addActionListener((ActionEvent e) -> {

            testResult = true;

            mainFrame.dispose();

            countDownLatch.countDown();

        });

        JButton failButton = new JButton("Fail");

        failButton.setActionCommand("Fail");

        failButton.addActionListener(new ActionListener() {

            @Override

            public void actionPerformed(ActionEvent e) {

                mainFrame.dispose();

                countDownLatch.countDown();

            }

        });

        gbc.gridx = 0;

        gbc.gridy = 0;

        resultButtonPanel.add(passButton, gbc);

        gbc.gridx = 1;

        gbc.gridy = 0;

        resultButtonPanel.add(failButton, gbc);

        gbc.gridx = 0;

        gbc.gridy = 2;

        mainControlPanel.add(resultButtonPanel, gbc);

        mainFrame.add(mainControlPanel);

        mainFrame.pack();

        mainFrame.addWindowListener(new WindowAdapter() {

            @Override

            public void windowClosing(WindowEvent e) {

                mainFrame.dispose();

                countDownLatch.countDown();

            }

        });

        mainFrame.setVisible(true);

    }

    private static JComponent createComponent() {

        createStyles();

        for (int i = 0; i < data.length; i++) {

            Paragraph p = data[i];

            addParagraph(p);

        }

        JTextPane textPane = new JTextPane(doc);

        JScrollPane scroller = new JScrollPane();

        JViewport port = scroller.getViewport();

        port.setScrollMode(JViewport.BACKINGSTORE_SCROLL_MODE);

        port.add(textPane);

        return scroller;

    }

    static void createStyles() {

        styles = new StyleContext();

        doc = new DefaultStyledDocument(styles);

        contentAttributes = new HashMap<>();

        // no attributes defined

        Style s = styles.addStyle(null, null);

        contentAttributes.put("none", s);

        Style def = styles.getStyle(StyleContext.DEFAULT_STYLE);

        Style heading = styles.addStyle("heading", def);

        StyleConstants.setFontFamily(heading, "SansSerif");

        StyleConstants.setBold(heading, true);

        StyleConstants.setAlignment(heading, StyleConstants.ALIGN_CENTER);

        StyleConstants.setSpaceAbove(heading, 10);

        StyleConstants.setSpaceBelow(heading, 10);

        StyleConstants.setFontSize(heading, 18);

        // Title

        Style sty = styles.addStyle("title", heading);

        StyleConstants.setFontSize(sty, 32);

        // author

        sty = styles.addStyle("author", heading);

        StyleConstants.setItalic(sty, true);

        StyleConstants.setSpaceBelow(sty, 25);

    }

    static void addParagraph(Paragraph p) {

        try {

            Style s = null;

            for (int i = 0; i < p.data.length; i++) {

                AttributedContent run = p.data[i];

                s = contentAttributes.get(run.attr);

                doc.insertString(doc.getLength(), run.content, s);

            }

            Style ls = styles.getStyle(p.logical);

            doc.setLogicalStyle(doc.getLength() - 1, ls);

            doc.insertString(doc.getLength(), "\n", null);

        } catch (BadLocationException e) {

            throw new RuntimeException(e);

        }

    }

    private static Paragraph[] data = new Paragraph[]{

        new Paragraph("title", new AttributedContent[]{

            new AttributedContent("none", "ALICE'S ADVENTURES IN WONDERLAND")

        }),

        new Paragraph("author", new AttributedContent[]{

            new AttributedContent("none", "Lewis Carroll")

        }),

        new Paragraph("heading", new AttributedContent[]{

            new AttributedContent("alice", " ")

        })};

    static class Paragraph {

        Paragraph(String logical, AttributedContent[] data) {

            this.logical = logical;

            this.data = data;

        }

        String logical;

        AttributedContent[] data;

    }

    static class AttributedContent {

        AttributedContent(String attr, String content) {

            this.attr = attr;

            this.content = content;

        }

        String attr;

        String content;

    }

}