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