1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of 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, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.text; 18 19 import com.android.ide.common.rendering.api.LayoutLog; 20 import com.android.layoutlib.bridge.Bridge; 21 import com.android.tools.layoutlib.annotations.LayoutlibDelegate; 22 import com.ibm.icu.text.Bidi; 23 24 25 /** 26 * Delegate used to provide new implementation for the native methods of {@link AndroidBidi} 27 * 28 * Through the layoutlib_create tool, the original methods of AndroidBidi have been replaced 29 * by calls to methods of the same name in this delegate class. 30 * 31 */ 32 public class AndroidBidi_Delegate { 33 34 @LayoutlibDelegate 35 /*package*/ static int runBidi(int dir, char[] chars, byte[] charInfo, int count, 36 boolean haveInfo) { 37 38 switch (dir) { 39 case 0: // Layout.DIR_REQUEST_LTR 40 case 1: // Layout.DIR_REQUEST_RTL 41 break; // No change. 42 case -1: 43 dir = Bidi.LEVEL_DEFAULT_LTR; 44 break; 45 case -2: 46 dir = Bidi.LEVEL_DEFAULT_RTL; 47 break; 48 default: 49 // Invalid code. Log error, assume LEVEL_DEFAULT_LTR and continue. 50 Bridge.getLog().error(LayoutLog.TAG_BROKEN, "Invalid direction flag", null); 51 dir = Bidi.LEVEL_DEFAULT_LTR; 52 } 53 Bidi bidi = new Bidi(chars, 0, null, 0, count, dir); 54 if (charInfo != null) { 55 for (int i = 0; i < count; ++i) 56 charInfo[i] = bidi.getLevelAt(i); 57 } 58 return bidi.getParaLevel(); 59 } 60 } 61
