1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17package android.text; 18 19import static org.junit.Assert.assertEquals; 20 21import android.support.test.filters.SmallTest; 22import android.support.test.runner.AndroidJUnit4; 23import android.util.Log; 24 25import org.junit.Test; 26import org.junit.runner.RunWith; 27 28/** 29 * Quick check of native bidi implementation. 30 */ 31@SmallTest 32@RunWith(AndroidJUnit4.class) 33public class StaticLayoutBidiTest { 34 35 public static final int REQ_DL = 2; // Layout.DIR_REQUEST_DEFAULT_LTR; 36 public static final int REQ_DR = -2; // Layout.DIR_REQUEST_DEFAULT_RTL; 37 public static final int REQ_L = 1; // Layout.DIR_REQUEST_LTR; 38 public static final int REQ_R = -1; // Layout.DIR_REQUEST_RTL; 39 public static final int L = Layout.DIR_LEFT_TO_RIGHT; 40 public static final int R = Layout.DIR_RIGHT_TO_LEFT; 41 42 public static final String SP = " "; 43 public static final String ALEF = "\u05d0"; 44 public static final String BET = "\u05d1"; 45 public static final String GIMEL = "\u05d2"; 46 public static final String DALET = "\u05d3"; 47 48 @Test 49 public void testAllLtr() { 50 expectNativeBidi(REQ_DL, "a test", "000000", L); 51 } 52 53 @Test 54 public void testLtrRtl() { 55 expectNativeBidi(REQ_DL, "abc " + ALEF + BET + GIMEL, "0000111", L); 56 } 57 58 @Test 59 public void testAllRtl() { 60 expectNativeBidi(REQ_DL, ALEF + SP + ALEF + BET + GIMEL + DALET, "111111", R); 61 } 62 63 @Test 64 public void testRtlLtr() { 65 expectNativeBidi(REQ_DL, ALEF + BET + GIMEL + " abc", "1111222", R); 66 } 67 68 @Test 69 public void testRAllLtr() { 70 expectNativeBidi(REQ_R, "a test", "222222", R); 71 } 72 73 @Test 74 public void testRLtrRtl() { 75 expectNativeBidi(REQ_R, "abc " + ALEF + BET + GIMEL, "2221111", R); 76 } 77 78 @Test 79 public void testLAllRtl() { 80 expectNativeBidi(REQ_L, ALEF + SP + ALEF + BET + GIMEL + DALET, "111111", L); 81 } 82 83 @Test 84 public void testLRtlLtr() { 85 expectNativeBidi(REQ_DL, ALEF + BET + GIMEL + " abc", "1111222", R); 86 } 87 88 @Test 89 public void testNativeBidi() { 90 expectNativeBidi(REQ_L, ALEF + BET + GIMEL + " abc", "1110000", L); 91 } 92 93 private void expectNativeBidi(int dir, String text, 94 String expectedLevels, int expectedDir) { 95 char[] chs = text.toCharArray(); 96 int n = chs.length; 97 byte[] chInfo = new byte[n]; 98 99 int resultDir = AndroidBidi.bidi(dir, chs, chInfo, n, false); 100 101 { 102 StringBuilder sb = new StringBuilder("info:"); 103 for (int i = 0; i < n; ++i) { 104 sb.append(" ").append(String.valueOf(chInfo[i])); 105 } 106 Log.i("BIDI", sb.toString()); 107 } 108 109 char[] resultLevelChars = new char[n]; 110 for (int i = 0; i < n; ++i) { 111 resultLevelChars[i] = (char)('0' + chInfo[i]); 112 } 113 String resultLevels = new String(resultLevelChars); 114 assertEquals("direction", expectedDir, resultDir); 115 assertEquals("levels", expectedLevels, resultLevels); 116 } 117} 118