1/*
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/* @test
25   @bug 8016833
26   @summary underlines and strikethroughs should be  painted at the correct
27            positions for different kind of text styles: normal, superscript and subscript
28   @author Anton Nashatyrev
29   @run main bug8016833
30*/
31import javax.swing.*;
32import javax.swing.text.BadLocationException;
33import javax.swing.text.Style;
34import javax.swing.text.StyleConstants;
35import javax.swing.text.StyledDocument;
36import java.awt.*;
37import java.awt.image.BufferedImage;
38import java.lang.reflect.InvocationTargetException;
39
40public class bug8016833 {
41
42    void drawText(final Graphics g, final boolean underline, final boolean strikethrough, final boolean background) {
43        drawText(g, "mama", underline, strikethrough, background);
44    }
45
46    void drawText(final Graphics g, final String text, final boolean underline, final boolean strikethrough, final boolean background) {
47        try {
48            SwingUtilities.invokeAndWait(new Runnable() {
49                @Override
50                public void run() {
51                    final JTextPane comp = new JTextPane();
52                    final StyledDocument doc = comp.getStyledDocument();
53
54                    Style style = comp.addStyle("superscript", null);
55                    setNormalStyle(style);
56
57                    if (underline) {
58                        StyleConstants.setUnderline(style, true);
59                    }
60                    if (strikethrough) {
61                        StyleConstants.setStrikeThrough(style, true);
62                    }
63                    if (background) {
64                        StyleConstants.setBackground(style, Color.BLUE);
65                    }
66                    try {
67                        doc.insertString(doc.getLength(), "mama", style);
68                    } catch (BadLocationException e) {
69                        throw new RuntimeException(e);
70                    }
71
72                    comp.setSize(200, 100);
73                    comp.paint(g);
74                }
75            });
76        } catch (InterruptedException e) {
77            throw new RuntimeException(e);
78        } catch (InvocationTargetException e) {
79            throw new RuntimeException(e);
80        }
81    }
82
83    void setNormalStyle(Style style) {
84        StyleConstants.setSuperscript(style, true);
85    }
86
87    int getEmptyPixel() {
88        return 0xFFFFFFFF;
89    }
90
91    boolean isPixelEmpty(int argb) {
92        return (argb & 0x00FFFFFF) == (getEmptyPixel() & 0x00FFFFFF);
93    }
94
95    boolean isLineEmpty(BufferedImage img, int coord, boolean isHorizontal) {
96        int len = isHorizontal ? img.getWidth() : img.getHeight();
97        for (int i = 0; i < len; i++) {
98            int pixel = isHorizontal ? img.getRGB(i, coord) : img.getRGB(coord, i);
99            if (!isPixelEmpty(pixel)) {
100                return false;
101            }
102        }
103        return true;
104    }
105
106    Rectangle getPixelsOutline(BufferedImage img) {
107        int x1 = 0;
108        while (x1 < img.getWidth() && isLineEmpty(img, x1, false)) {
109            x1++;
110        }
111        int x2 = img.getWidth() - 1;
112        while (x2 >= 0 && isLineEmpty(img, x2, false)) {
113            x2--;
114        }
115        int y1 = 0;
116        while (y1 < img.getHeight() && isLineEmpty(img, y1, true)) {
117            y1++;
118        }
119        int y2 = img.getHeight() - 1;
120        while (y2 >= 0 && isLineEmpty(img, y2, true)) {
121            y2--;
122        }
123
124        return new Rectangle(x1, y1, x2 - x1 + 1, y2 - y1 + 1);
125    }
126
127    BufferedImage createImage() {
128        final BufferedImage img = new BufferedImage(200, 100, BufferedImage.TYPE_INT_ARGB);
129        try {
130            SwingUtilities.invokeAndWait(new Runnable() {
131                @Override
132                public void run() {
133                    Graphics g = img.getGraphics();
134                    g.setColor(new Color(getEmptyPixel()));
135                    g.fillRect(0, 0, 10000, 10000);
136                }
137            });
138        } catch (InterruptedException e) {
139            throw new RuntimeException(e);
140        } catch (InvocationTargetException e) {
141            throw new RuntimeException(e);
142        }
143        return img;
144    }
145
146    int subPixels(int pix1, int pix2) {
147        if (pix1 == pix2) {
148            return getEmptyPixel();
149        }
150        return pix1;
151    }
152
153    /**
154     * Subtracts img2 from img1
155     */
156    BufferedImage subImages(BufferedImage img1, BufferedImage img2) {
157        if (img1.getHeight() != img2.getHeight() ||
158                img1.getWidth() != img2.getWidth()) {
159            throw new RuntimeException("Different sizes");
160        }
161        BufferedImage ret = new BufferedImage(img1.getWidth(), img1.getHeight(), img1.getType());
162
163        for (int x = 0; x < ret.getWidth(); x++) {
164            for (int y = 0; y < ret.getHeight(); y++) {
165                ret.setRGB(x, y, subPixels(img1.getRGB(x, y), img2.getRGB(x, y)));
166            }
167        }
168        return ret;
169    }
170
171    void testUnderline() {
172        System.out.println("  testUnderline()");
173
174        final BufferedImage img1 = createImage();
175        drawText(img1.getGraphics(), true, false, false);
176        final Rectangle out1 = getPixelsOutline(img1);
177        System.out.println("   Underlined: " + out1);
178
179        final BufferedImage img2 = createImage();
180        drawText(img2.getGraphics(), false, false, false);
181        final Rectangle out2 = getPixelsOutline(img2);
182        System.out.println("   Normal: " + out2);
183
184        final BufferedImage img3 = subImages(img1, img2);
185        final Rectangle out3 = getPixelsOutline(img3);
186        System.out.println("   Sub: " + out3);
187
188        // underline is not too thick
189        assertTrue(out3.getHeight() <= 2);
190        // not too wide
191        assertTrue(out3.getWidth() * 0.8 < out2.getWidth());
192        // not too low
193        assertTrue(out3.getY() - (out1.getY() + out2.getHeight() - 1) < 4);
194        // not too high
195        assertTrue(out3.getY() - (out1.getY() + out2.getHeight() - 1) > 0);
196    }
197
198    void testStrikthrough() {
199        System.out.println("  testStrikthrough()");
200
201        final BufferedImage img1 = createImage();
202        drawText(img1.getGraphics(), false, true, false);
203        final Rectangle out1 = getPixelsOutline(img1);
204        System.out.println("   Striked: " + out1);
205
206        final BufferedImage img2 = createImage();
207        drawText(img2.getGraphics(), false, false, false);
208        final Rectangle out2 = getPixelsOutline(img2);
209        System.out.println("   Normal: " + out2);
210
211        final BufferedImage img3 = subImages(img1, img2);
212        final Rectangle out3 = getPixelsOutline(img3);
213        System.out.println("   Sub: " + out3);
214
215        // strikethrough is not too thick
216        assertTrue(out3.getHeight() <= 2);
217        // not too wide
218        assertTrue(out3.getWidth() * 0.8 < out2.getWidth());
219        // not too low
220        assertTrue(out3.getY() - (out1.getY() + out2.getHeight() - 1) < 0);
221        // not too high
222        assertTrue(out3.getY() - out1.getY() > 1);
223    }
224    void assertTrue(boolean b) {
225        if (!b) {
226            throw new RuntimeException("Assertion failed");
227        }
228    }
229
230    static void testSuperScript() {
231        System.out.println("testSuperScript()");
232        bug8016833 b = new bug8016833() {
233            @Override
234            void setNormalStyle(Style style) {
235                StyleConstants.setSuperscript(style, true);
236            }
237        };
238        b.testUnderline();
239        b.testStrikthrough();
240    }
241
242    static void testSubScript() {
243        System.out.println("testSubScript()");
244        bug8016833 b = new bug8016833() {
245            @Override
246            void setNormalStyle(Style style) {
247                StyleConstants.setSubscript(style, true);
248            }
249        };
250        b.testUnderline();
251        b.testStrikthrough();
252    }
253
254    static void testNormalScript() {
255        System.out.println("testNormalScript()");
256        bug8016833 b = new bug8016833() {
257            @Override
258            void setNormalStyle(Style style) {
259            }
260        };
261        b.testUnderline();
262        b.testStrikthrough();
263    }
264
265    public static void main(String[] args) {
266        testSubScript();
267        testSuperScript();
268        testNormalScript();
269    }
270}
271