19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2007 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.widget; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport java.util.ArrayList; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * ExpandableListPosition can refer to either a group's position or a child's 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * position. Referring to a child's position requires both a group position (the 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * group containing the child) and a child position (the child's position within 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * that group). To create objects, use {@link #obtainChildPosition(int, int)} or 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #obtainGroupPosition(int)}. 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectclass ExpandableListPosition { 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static final int MAX_POOL_SIZE = 5; 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static ArrayList<ExpandableListPosition> sPool = 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project new ArrayList<ExpandableListPosition>(MAX_POOL_SIZE); 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This data type represents a child position 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final static int CHILD = 1; 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This data type represents a group position 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public final static int GROUP = 2; 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The position of either the group being referred to, or the parent 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * group of the child being referred to 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int groupPos; 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The position of the child within its parent group 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int childPos; 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The position of the item in the flat list (optional, used internally when 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * the corresponding flat list position for the group or child is known) 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int flatListPos; 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * What type of position this ExpandableListPosition represents 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int type; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private void resetState() { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project groupPos = 0; 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project childPos = 0; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project flatListPos = 0; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project type = 0; 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private ExpandableListPosition() { 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project long getPackedPosition() { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (type == CHILD) return ExpandableListView.getPackedPositionForChild(groupPos, childPos); 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else return ExpandableListView.getPackedPositionForGroup(groupPos); 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static ExpandableListPosition obtainGroupPosition(int groupPosition) { 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return obtain(GROUP, groupPosition, 0, 0); 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static ExpandableListPosition obtainChildPosition(int groupPosition, int childPosition) { 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return obtain(CHILD, groupPosition, childPosition, 0); 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static ExpandableListPosition obtainPosition(long packedPosition) { 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (packedPosition == ExpandableListView.PACKED_POSITION_VALUE_NULL) { 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ExpandableListPosition elp = getRecycledOrCreate(); 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.groupPos = ExpandableListView.getPackedPositionGroup(packedPosition); 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (ExpandableListView.getPackedPositionType(packedPosition) == 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ExpandableListView.PACKED_POSITION_TYPE_CHILD) { 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.type = CHILD; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.childPos = ExpandableListView.getPackedPositionChild(packedPosition); 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.type = GROUP; 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return elp; 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project static ExpandableListPosition obtain(int type, int groupPos, int childPos, int flatListPos) { 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ExpandableListPosition elp = getRecycledOrCreate(); 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.type = type; 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.groupPos = groupPos; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.childPos = childPos; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.flatListPos = flatListPos; 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return elp; 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static ExpandableListPosition getRecycledOrCreate() { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project ExpandableListPosition elp; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (sPool) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sPool.size() > 0) { 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp = sPool.remove(0); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ExpandableListPosition(); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project elp.resetState(); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return elp; 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void recycle() { 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project synchronized (sPool) { 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (sPool.size() < MAX_POOL_SIZE) { 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project sPool.add(this); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 136