1 /* 2 * Copyright (c) 1998, 2016, 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 /** 25 * @test 26 * @bug 4178145 8144015 27 */ 28 29 /* 30 * Copyright 1998 IBM Corp. All Rights Reserved. 31 */ 32 33 import java.awt.Color; 34 import java.awt.Font; 35 import java.awt.Frame; 36 import java.awt.Graphics; 37 import java.awt.Graphics2D; 38 import java.awt.GraphicsEnvironment; 39 import java.awt.font.TextAttribute; 40 import java.awt.font.TextLayout; 41 import java.awt.font.TextHitInfo; 42 import java.awt.font.FontRenderContext; 43 import java.util.Hashtable; 44 45 /** 46 * This test ensures that TextLayout will not place a caret within 47 * an Arabic lam-alef ligature, and will correctly caret through 48 * bidirectional text with numbers. 49 */ 50 51 public class LigatureCaretTest { 52 main(String[] args)53 public static void main(String[] args) { 54 55 testBidiWithNumbers(); 56 testLamAlef(); 57 System.out.println("LigatureCaretTest PASSED"); 58 } 59 60 private static final FontRenderContext frc = 61 new FontRenderContext(null, false, false); 62 getFontForText(String s)63 private static Font getFontForText(String s) { 64 GraphicsEnvironment ge = 65 GraphicsEnvironment.getLocalGraphicsEnvironment(); 66 Font[] fonts = ge.getAllFonts(); 67 68 for (Font f : fonts) { 69 if (f.canDisplayUpTo(s) == -1) { 70 return f.deriveFont(Font.PLAIN, 24); 71 } 72 } 73 return null; 74 } 75 76 /** 77 * Caret through text mixed-direction text and check the results. 78 * If the test fails an Error is thrown. 79 * @exception an Error is thrown if the test fails 80 */ testBidiWithNumbers()81 public static void testBidiWithNumbers() { 82 83 String bidiWithNumbers = "abc\u05D0\u05D1\u05D2123abc"; 84 Font font = getFontForText(bidiWithNumbers); 85 if (font == null) { 86 return; 87 } 88 Hashtable map = new Hashtable(); 89 map.put(TextAttribute.FONT, font); 90 91 // visual order for the text: 92 // abc123<gimel><bet><aleph>abc 93 94 int[] carets = { 0, 1, 2, 3, 7, 8, 6, 5, 4, 9, 10, 11, 12 }; 95 TextLayout layout = new TextLayout(bidiWithNumbers, map, frc); 96 97 // Caret through TextLayout in both directions and check results. 98 for (int i=0; i < carets.length-1; i++) { 99 100 TextHitInfo hit = layout.getNextRightHit(carets[i]); 101 if (hit.getInsertionIndex() != carets[i+1]) { 102 throw new Error("right hit failed within layout"); 103 } 104 } 105 106 if (layout.getNextRightHit(carets[carets.length-1]) != null) { 107 throw new Error("right hit failed at end of layout"); 108 } 109 110 for (int i=carets.length-1; i > 0; i--) { 111 112 TextHitInfo hit = layout.getNextLeftHit(carets[i]); 113 if (hit.getInsertionIndex() != carets[i-1]) { 114 throw new Error("left hit failed within layout"); 115 } 116 } 117 118 if (layout.getNextLeftHit(carets[0]) != null) { 119 throw new Error("left hit failed at end of layout"); 120 } 121 } 122 123 /** 124 * Ensure proper careting and hit-testing behavior with 125 * a lam-alef ligature. 126 * If the test fails, an Error is thrown. 127 * @exception an Error is thrown if the test fails 128 */ testLamAlef()129 public static void testLamAlef() { 130 131 // lam-alef form a mandantory ligature. 132 final String lamAlef = "\u0644\u0627"; 133 final String ltrText = "abcd"; 134 135 Font font = getFontForText(lamAlef+ltrText); 136 if (font == null) { 137 return; 138 } 139 Hashtable map = new Hashtable(); 140 map.put(TextAttribute.FONT, font); 141 142 // Create a TextLayout with just a lam-alef sequence. There 143 // should only be two valid caret positions: one at 144 // insertion offset 0 and the other at insertion offset 2. 145 TextLayout layout = new TextLayout(lamAlef, map, frc); 146 147 TextHitInfo hit; 148 149 hit = layout.getNextLeftHit(0); 150 if (hit.getInsertionIndex() != 2) { 151 throw new Error("Left hit failed. Hit:" + hit); 152 } 153 154 hit = layout.getNextRightHit(2); 155 if (hit.getInsertionIndex() != 0) { 156 throw new Error("Right hit failed. Hit:" + hit); 157 } 158 159 hit = layout.hitTestChar(layout.getAdvance()/2, 0); 160 if (hit.getInsertionIndex() != 0 && hit.getInsertionIndex() != 2) { 161 throw new Error("Hit-test allowed incorrect caret. Hit:" + hit); 162 } 163 164 165 // Create a TextLayout with some left-to-right text 166 // before the lam-alef sequence. There should not be 167 // a caret position between the lam and alef. 168 layout = new TextLayout(ltrText+lamAlef, map, frc); 169 170 final int ltrLen = ltrText.length(); 171 final int layoutLen = layout.getCharacterCount(); 172 173 for (int i=0; i < ltrLen; i++) { 174 hit = layout.getNextRightHit(i); 175 if (hit.getInsertionIndex() != i+1) { 176 throw new Error("Right hit failed in ltr text."); 177 } 178 } 179 180 hit = layout.getNextRightHit(ltrLen); 181 if (layoutLen != hit.getInsertionIndex()) { 182 throw new Error("Right hit failed at direction boundary."); 183 } 184 185 hit = layout.getNextLeftHit(layoutLen); 186 if (hit.getInsertionIndex() != ltrLen) { 187 throw new Error("Left hit failed at end of text."); 188 } 189 } 190 } 191