1/*
2 * Copyright (c) 2005, 2008, 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
25import java.awt.*;
26import java.awt.font.*;
27import java.awt.geom.*;
28import java.text.*;
29
30/* @test
31 * @summary verify TextLine advance
32 * @bug 6582460 8164818
33 */
34
35/*
36 Sample correct output:
37Left-to-right (One style): Advance = 127.30078, Visible advance = 118.30078
38Right-to-left (One style): Advance = 127.30078, Visible advance = 118.30078
39Left-to-right (Multiple styles): Advance = 127.30078, Visible advance = 118.30078
40Right-to-left (Multiple styles): Advance = 127.30078, Visible advance = 118.30078
41*/
42
43public class VisibleAdvance
44{
45    public static void main (String [] args)
46    {
47        System.out.println ("java.version = " + System.getProperty ("java.version"));
48
49        float advances[] = null;
50        advances = showAndCalculateAdvance ("Left-to-right (One style): ", getString (TextAttribute.RUN_DIRECTION_LTR, false), advances);
51        advances = showAndCalculateAdvance ("Right-to-left (One style): ", getString (TextAttribute.RUN_DIRECTION_RTL, false), advances);
52
53        advances = showAndCalculateAdvance ("Left-to-right (Multiple styles): ", getString (TextAttribute.RUN_DIRECTION_LTR, true), advances);
54        advances = showAndCalculateAdvance ("Right-to-left (Multiple styles): ", getString (TextAttribute.RUN_DIRECTION_RTL, true), advances);
55    }
56
57    private static final String textA = "Text with trailing ";
58    private static final String textB = "spaces";
59    private static final String textC = "   ";
60    private static final String text = textA + textB + textC;
61
62    private static final int startOfTextB = textA.length ();
63    private static final int endOfTextB = startOfTextB + textB.length ();
64
65    private static final Font font = new Font ("Serif", Font.PLAIN, 12);
66
67    private static AttributedString getString (Boolean direction,
68                                               boolean multipleStyles)
69    {
70        AttributedString as = new AttributedString (text);
71        as.addAttribute (TextAttribute.FONT, font);
72        as.addAttribute (TextAttribute.RUN_DIRECTION, direction);
73
74        if (multipleStyles)
75            as.addAttribute (TextAttribute.FOREGROUND, Color.RED, startOfTextB, endOfTextB);
76
77        return as;
78    }
79
80    private static FontRenderContext fontRenderContext =
81        new FontRenderContext (new AffineTransform (), true, true);
82
83    /*
84     * @param advances on input,  null or float[2]. On output:  { advance, visibleAdvance }
85     * @param return new float array
86     */
87    private static float[] showAndCalculateAdvance (String what,
88                                     AttributedString as,
89                                     float advances[])
90    {
91        TextLayout layout = new TextLayout (as.getIterator (), fontRenderContext);
92
93        System.out.println (what + "Advance = " + layout.getAdvance () +
94                            ", Visible advance = " + layout.getVisibleAdvance ());
95        float advance = layout.getAdvance();
96        float visAdvance = layout.getVisibleAdvance();
97        if(advances == null) {
98           advances = new float[2];
99        } else if( Float.compare(advances[0],advance)!=0 || Float.compare(advances[1],visAdvance)!=0) {
100                throw new RuntimeException("MISMATCH in advance.. " + what + "Advance = " + layout.getAdvance () +
101                            ", Visible advance = " + layout.getVisibleAdvance () + ", previous values were: ["+advances[0]+","+advances[1]+"]");
102        }
103        advances[0] = advance;
104        advances[1] = visAdvance;
105        return advances;
106    }
107}
108