1 /*
2 *
3 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Oracle nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package java2d.demos.Fonts;
33
34
35 import static java.awt.Color.BLACK;
36 import static java.awt.Color.CYAN;
37 import static java.awt.Color.LIGHT_GRAY;
38 import static java.awt.Color.WHITE;
39 import java.awt.Color;
40 import java.awt.Font;
41 import java.awt.Graphics2D;
42 import java.awt.Shape;
43 import java.awt.font.FontRenderContext;
44 import java.awt.font.TextHitInfo;
45 import java.awt.font.TextLayout;
46 import java.awt.geom.AffineTransform;
47 import java.awt.geom.Rectangle2D;
48 import java2d.AnimatingSurface;
49
50
51 /**
52 * Highlighting of text showing the caret, the highlight & the character
53 * advances.
54 */
55 @SuppressWarnings("serial")
56 public class Highlighting extends AnimatingSurface {
57
58 private static String[] text = { "HIGHLIGHTING", "OpenJDK" };
59 private static Color[] colors = { CYAN, LIGHT_GRAY };
60 private static Font smallF = new Font("Monospaced", Font.PLAIN, 8);
61 private int[] curPos;
62 private TextLayout[] layouts;
63 private Font[] fonts;
64
65 public Highlighting() {
66 setBackground(WHITE);
67 fonts = new Font[2];
68 layouts = new TextLayout[fonts.length];
69 curPos = new int[fonts.length];
70 }
71
72 @Override
73 public void reset(int w, int h) {
74 fonts[0] = new Font("Monospaced", Font.PLAIN, w / text[0].length() + 8);
75 fonts[1] = new Font("Serif", Font.BOLD, w / text[1].length());
76 for (int i = 0; i < layouts.length; i++) {
77 curPos[i] = 0;
78 }
79 }
80
81 @Override
82 public void step(int w, int h) {
83 setSleepAmount(900);
84 for (int i = 0; i < 2; i++) {
85 if (layouts[i] == null) {
86 continue;
87 }
88 if (curPos[i]++ == layouts[i].getCharacterCount()) {
89 curPos[i] = 0;
90 }
91 }
92 }
93
94 @Override
95 public void render(int w, int h, Graphics2D g2) {
96 FontRenderContext frc = g2.getFontRenderContext();
97 for (int i = 0; i < 2; i++) {
98 layouts[i] = new TextLayout(text[i], fonts[i], frc);
99 float rw = layouts[i].getAdvance();
100 float rx = ((w - rw) / 2);
101 float ry = ((i == 0) ? h / 3 : h * 0.75f);
102
103 // draw highlighted shape
104 Shape hilite = layouts[i].getLogicalHighlightShape(0, curPos[i]);
105 AffineTransform at = AffineTransform.getTranslateInstance(rx, ry);
106 hilite = at.createTransformedShape(hilite);
107 float hy = (float) hilite.getBounds2D().getY();
108 float hh = (float) hilite.getBounds2D().getHeight();
109 g2.setColor(colors[i]);
110 g2.fill(hilite);
111
112 // get caret shape
113 Shape[] shapes = layouts[i].getCaretShapes(curPos[i]);
114 Shape caret = at.createTransformedShape(shapes[0]);
115
116 g2.setColor(BLACK);
117 layouts[i].draw(g2, rx, ry);
118 g2.draw(caret);
119 g2.draw(new Rectangle2D.Float(rx, hy, rw, hh));
120
121 // Display character advances.
122 for (int j = 0; j <= layouts[i].getCharacterCount(); j++) {
123 float[] cInfo = layouts[i].getCaretInfo(TextHitInfo.leading(j));
124 String str = String.valueOf((int) cInfo[0]);
125 TextLayout tl = new TextLayout(str, smallF, frc);
126 tl.draw(g2, rx + cInfo[0] - tl.getAdvance() / 2, hy + hh + tl.
127 getAscent() + 1.0f);
128 }
129 }
130 }
131
132 public static void main(String[] argv) {
133 createDemoFrame(new Highlighting());
134 }
135 }