Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 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 com.android.documentsui.dirlist; |
| 18 | |
| 19 | import static com.android.documentsui.Shared.DEBUG; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 20 | import static com.android.documentsui.State.SORT_ORDER_DISPLAY_NAME; |
| 21 | import static com.android.documentsui.State.SORT_ORDER_LAST_MODIFIED; |
| 22 | import static com.android.documentsui.State.SORT_ORDER_SIZE; |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 23 | import static com.android.documentsui.model.DocumentInfo.getCursorLong; |
| 24 | import static com.android.documentsui.model.DocumentInfo.getCursorString; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 25 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 26 | import android.database.Cursor; |
Tomasz Mikolajewski | 20c04c5 | 2016-03-15 15:55:46 +0900 | [diff] [blame] | 27 | import android.database.MergeCursor; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 28 | import android.os.Bundle; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 29 | import android.provider.DocumentsContract; |
| 30 | import android.provider.DocumentsContract.Document; |
| 31 | import android.support.annotation.Nullable; |
| 32 | import android.support.annotation.VisibleForTesting; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 33 | import android.util.Log; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 34 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 35 | import com.android.documentsui.DirectoryResult; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 36 | import com.android.documentsui.RootCursorWrapper; |
Steve McKay | 55c00e7 | 2016-02-18 15:32:16 -0800 | [diff] [blame] | 37 | import com.android.documentsui.Shared; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 38 | import com.android.documentsui.dirlist.MultiSelectManager.Selection; |
| 39 | import com.android.documentsui.model.DocumentInfo; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 40 | |
| 41 | import java.util.ArrayList; |
Steve McKay | 5a22a11 | 2016-04-12 11:29:10 -0700 | [diff] [blame] | 42 | import java.util.Collections; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 43 | import java.util.HashMap; |
| 44 | import java.util.List; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 45 | import java.util.Map; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 46 | |
| 47 | /** |
| 48 | * The data model for the current loaded directory. |
| 49 | */ |
| 50 | @VisibleForTesting |
Tomasz Mikolajewski | d71bd61 | 2016-02-16 12:28:43 +0900 | [diff] [blame] | 51 | public class Model { |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 52 | private static final String TAG = "Model"; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 53 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 54 | private boolean mIsLoading; |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 55 | private List<UpdateListener> mUpdateListeners = new ArrayList<>(); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 56 | @Nullable private Cursor mCursor; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 57 | private int mCursorCount; |
| 58 | /** Maps Model ID to cursor positions, for looking up items by Model ID. */ |
| 59 | private Map<String, Integer> mPositions = new HashMap<>(); |
| 60 | /** |
| 61 | * A sorted array of model IDs for the files currently in the Model. Sort order is determined |
| 62 | * by {@link #mSortOrder} |
| 63 | */ |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 64 | private String mIds[] = new String[0]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 65 | private int mSortOrder = SORT_ORDER_DISPLAY_NAME; |
| 66 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 67 | @Nullable String info; |
| 68 | @Nullable String error; |
Tomasz Mikolajewski | e29e341 | 2016-02-24 12:53:44 +0900 | [diff] [blame] | 69 | @Nullable DocumentInfo doc; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 70 | |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 71 | private void notifyUpdateListeners() { |
| 72 | for (UpdateListener listener: mUpdateListeners) { |
| 73 | listener.onModelUpdate(this); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | private void notifyUpdateListeners(Exception e) { |
| 78 | for (UpdateListener listener: mUpdateListeners) { |
| 79 | listener.onModelUpdateFailed(e); |
| 80 | } |
| 81 | } |
| 82 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 83 | void update(DirectoryResult result) { |
| 84 | if (DEBUG) Log.i(TAG, "Updating model with new result set."); |
| 85 | |
| 86 | if (result == null) { |
| 87 | mCursor = null; |
| 88 | mCursorCount = 0; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 89 | mIds = new String[0]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 90 | mPositions.clear(); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 91 | info = null; |
| 92 | error = null; |
Tomasz Mikolajewski | e29e341 | 2016-02-24 12:53:44 +0900 | [diff] [blame] | 93 | doc = null; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 94 | mIsLoading = false; |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 95 | notifyUpdateListeners(); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 96 | return; |
| 97 | } |
| 98 | |
| 99 | if (result.exception != null) { |
| 100 | Log.e(TAG, "Error while loading directory contents", result.exception); |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 101 | notifyUpdateListeners(result.exception); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 102 | return; |
| 103 | } |
| 104 | |
| 105 | mCursor = result.cursor; |
| 106 | mCursorCount = mCursor.getCount(); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 107 | mSortOrder = result.sortOrder; |
Tomasz Mikolajewski | e29e341 | 2016-02-24 12:53:44 +0900 | [diff] [blame] | 108 | doc = result.doc; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 109 | |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 110 | updateModelData(); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 111 | |
| 112 | final Bundle extras = mCursor.getExtras(); |
| 113 | if (extras != null) { |
| 114 | info = extras.getString(DocumentsContract.EXTRA_INFO); |
| 115 | error = extras.getString(DocumentsContract.EXTRA_ERROR); |
| 116 | mIsLoading = extras.getBoolean(DocumentsContract.EXTRA_LOADING, false); |
| 117 | } |
| 118 | |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 119 | notifyUpdateListeners(); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 120 | } |
| 121 | |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 122 | @VisibleForTesting |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 123 | int getItemCount() { |
Ben Kwa | da858bf | 2015-12-09 14:33:49 -0800 | [diff] [blame] | 124 | return mCursorCount; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | /** |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 128 | * Scan over the incoming cursor data, generate Model IDs for each row, and sort the IDs |
| 129 | * according to the current sort order. |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 130 | */ |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 131 | private void updateModelData() { |
| 132 | int[] positions = new int[mCursorCount]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 133 | mIds = new String[mCursorCount]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 134 | boolean[] isDirs = new boolean[mCursorCount]; |
| 135 | String[] displayNames = null; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 136 | long[] longValues = null; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 137 | |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 138 | switch (mSortOrder) { |
| 139 | case SORT_ORDER_DISPLAY_NAME: |
| 140 | displayNames = new String[mCursorCount]; |
| 141 | break; |
| 142 | case SORT_ORDER_LAST_MODIFIED: |
| 143 | case SORT_ORDER_SIZE: |
| 144 | longValues = new long[mCursorCount]; |
| 145 | break; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 146 | } |
| 147 | |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 148 | String mimeType; |
| 149 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 150 | mCursor.moveToPosition(-1); |
| 151 | for (int pos = 0; pos < mCursorCount; ++pos) { |
| 152 | mCursor.moveToNext(); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 153 | positions[pos] = pos; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 154 | |
Tomasz Mikolajewski | 985df3d | 2016-03-15 15:38:54 +0900 | [diff] [blame] | 155 | // Generates a Model ID for a cursor entry that refers to a document. The Model ID is a |
| 156 | // unique string that can be used to identify the document referred to by the cursor. |
Tomasz Mikolajewski | 20c04c5 | 2016-03-15 15:55:46 +0900 | [diff] [blame] | 157 | // If the cursor is a merged cursor over multiple authorities, then prefix the ids |
| 158 | // with the authority to avoid collisions. |
| 159 | if (mCursor instanceof MergeCursor) { |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 160 | mIds[pos] = getCursorString(mCursor, RootCursorWrapper.COLUMN_AUTHORITY) + "|" + |
| 161 | getCursorString(mCursor, Document.COLUMN_DOCUMENT_ID); |
Tomasz Mikolajewski | 20c04c5 | 2016-03-15 15:55:46 +0900 | [diff] [blame] | 162 | } else { |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 163 | mIds[pos] = getCursorString(mCursor, Document.COLUMN_DOCUMENT_ID); |
Tomasz Mikolajewski | 20c04c5 | 2016-03-15 15:55:46 +0900 | [diff] [blame] | 164 | } |
Tomasz Mikolajewski | 985df3d | 2016-03-15 15:38:54 +0900 | [diff] [blame] | 165 | |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 166 | mimeType = getCursorString(mCursor, Document.COLUMN_MIME_TYPE); |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 167 | isDirs[pos] = Document.MIME_TYPE_DIR.equals(mimeType); |
| 168 | |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 169 | switch(mSortOrder) { |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 170 | case SORT_ORDER_DISPLAY_NAME: |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 171 | final String displayName = getCursorString( |
| 172 | mCursor, Document.COLUMN_DISPLAY_NAME); |
| 173 | displayNames[pos] = displayName; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 174 | break; |
| 175 | case SORT_ORDER_LAST_MODIFIED: |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 176 | longValues[pos] = getLastModified(mCursor); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 177 | break; |
| 178 | case SORT_ORDER_SIZE: |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 179 | longValues[pos] = getCursorLong(mCursor, Document.COLUMN_SIZE); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 180 | break; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | switch (mSortOrder) { |
| 185 | case SORT_ORDER_DISPLAY_NAME: |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 186 | binarySort(displayNames, isDirs, positions, mIds); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 187 | break; |
| 188 | case SORT_ORDER_LAST_MODIFIED: |
| 189 | case SORT_ORDER_SIZE: |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 190 | binarySort(longValues, isDirs, positions, mIds); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 191 | break; |
| 192 | } |
| 193 | |
| 194 | // Populate the positions. |
| 195 | mPositions.clear(); |
| 196 | for (int i = 0; i < mCursorCount; ++i) { |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 197 | mPositions.put(mIds[i], positions[i]); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 198 | } |
| 199 | } |
| 200 | |
| 201 | /** |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 202 | * Sorts model data. Takes three columns of index-corresponded data. The first column is the |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 203 | * sort key. Rows are sorted in ascending alphabetical order on the sort key. |
| 204 | * Directories are always shown first. This code is based on TimSort.binarySort(). |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 205 | * |
| 206 | * @param sortKey Data is sorted in ascending alphabetical order. |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 207 | * @param isDirs Array saying whether an item is a directory or not. |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 208 | * @param positions Cursor positions to be sorted. |
| 209 | * @param ids Model IDs to be sorted. |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 210 | */ |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 211 | private static void binarySort(String[] sortKey, boolean[] isDirs, int[] positions, String[] ids) { |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 212 | final int count = positions.length; |
| 213 | for (int start = 1; start < count; start++) { |
| 214 | final int pivotPosition = positions[start]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 215 | final String pivotValue = sortKey[start]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 216 | final boolean pivotIsDir = isDirs[start]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 217 | final String pivotId = ids[start]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 218 | |
| 219 | int left = 0; |
| 220 | int right = start; |
| 221 | |
| 222 | while (left < right) { |
| 223 | int mid = (left + right) >>> 1; |
| 224 | |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 225 | // Directories always go in front. |
| 226 | int compare = 0; |
| 227 | final boolean rhsIsDir = isDirs[mid]; |
| 228 | if (pivotIsDir && !rhsIsDir) { |
| 229 | compare = -1; |
| 230 | } else if (!pivotIsDir && rhsIsDir) { |
| 231 | compare = 1; |
| 232 | } else { |
| 233 | final String lhs = pivotValue; |
| 234 | final String rhs = sortKey[mid]; |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 235 | compare = Shared.compareToIgnoreCaseNullable(lhs, rhs); |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 236 | } |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 237 | |
| 238 | if (compare < 0) { |
| 239 | right = mid; |
| 240 | } else { |
| 241 | left = mid + 1; |
| 242 | } |
| 243 | } |
| 244 | |
| 245 | int n = start - left; |
| 246 | switch (n) { |
| 247 | case 2: |
| 248 | positions[left + 2] = positions[left + 1]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 249 | sortKey[left + 2] = sortKey[left + 1]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 250 | isDirs[left + 2] = isDirs[left + 1]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 251 | ids[left + 2] = ids[left + 1]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 252 | case 1: |
| 253 | positions[left + 1] = positions[left]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 254 | sortKey[left + 1] = sortKey[left]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 255 | isDirs[left + 1] = isDirs[left]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 256 | ids[left + 1] = ids[left]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 257 | break; |
| 258 | default: |
| 259 | System.arraycopy(positions, left, positions, left + 1, n); |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 260 | System.arraycopy(sortKey, left, sortKey, left + 1, n); |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 261 | System.arraycopy(isDirs, left, isDirs, left + 1, n); |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 262 | System.arraycopy(ids, left, ids, left + 1, n); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 263 | } |
| 264 | |
| 265 | positions[left] = pivotPosition; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 266 | sortKey[left] = pivotValue; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 267 | isDirs[left] = pivotIsDir; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 268 | ids[left] = pivotId; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 269 | } |
| 270 | } |
| 271 | |
| 272 | /** |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 273 | * Sorts model data. Takes four columns of index-corresponded data. The first column is the sort |
| 274 | * key, and the second is an array of mime types. The rows are first bucketed by mime type |
| 275 | * (directories vs documents) and then each bucket is sorted independently in descending |
| 276 | * numerical order on the sort key. This code is based on TimSort.binarySort(). |
| 277 | * |
| 278 | * @param sortKey Data is sorted in descending numerical order. |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 279 | * @param isDirs Array saying whether an item is a directory or not. |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 280 | * @param positions Cursor positions to be sorted. |
| 281 | * @param ids Model IDs to be sorted. |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 282 | */ |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 283 | private static void binarySort( |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 284 | long[] sortKey, boolean[] isDirs, int[] positions, String[] ids) { |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 285 | final int count = positions.length; |
| 286 | for (int start = 1; start < count; start++) { |
| 287 | final int pivotPosition = positions[start]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 288 | final long pivotValue = sortKey[start]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 289 | final boolean pivotIsDir = isDirs[start]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 290 | final String pivotId = ids[start]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 291 | |
| 292 | int left = 0; |
| 293 | int right = start; |
| 294 | |
| 295 | while (left < right) { |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 296 | int mid = ((left + right) >>> 1); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 297 | |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 298 | // Directories always go in front. |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 299 | int compare = 0; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 300 | final boolean rhsIsDir = isDirs[mid]; |
| 301 | if (pivotIsDir && !rhsIsDir) { |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 302 | compare = -1; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 303 | } else if (!pivotIsDir && rhsIsDir) { |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 304 | compare = 1; |
| 305 | } else { |
| 306 | final long lhs = pivotValue; |
| 307 | final long rhs = sortKey[mid]; |
Ben Kwa | e433834 | 2016-01-08 15:34:47 -0800 | [diff] [blame] | 308 | // Sort in descending numerical order. This matches legacy behaviour, which |
| 309 | // yields largest or most recent items on top. |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 310 | compare = -Long.compare(lhs, rhs); |
| 311 | } |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 312 | |
Ben Kwa | e433834 | 2016-01-08 15:34:47 -0800 | [diff] [blame] | 313 | // If numerical comparison yields a tie, use document ID as a tie breaker. This |
| 314 | // will yield stable results even if incoming items are continually shuffling and |
| 315 | // have identical numerical sort keys. One common example of this scenario is seen |
| 316 | // when sorting a set of active downloads by mod time. |
| 317 | if (compare == 0) { |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 318 | compare = pivotId.compareTo(ids[mid]); |
Ben Kwa | e433834 | 2016-01-08 15:34:47 -0800 | [diff] [blame] | 319 | } |
| 320 | |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 321 | if (compare < 0) { |
| 322 | right = mid; |
| 323 | } else { |
| 324 | left = mid + 1; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | int n = start - left; |
| 329 | switch (n) { |
| 330 | case 2: |
| 331 | positions[left + 2] = positions[left + 1]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 332 | sortKey[left + 2] = sortKey[left + 1]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 333 | isDirs[left + 2] = isDirs[left + 1]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 334 | ids[left + 2] = ids[left + 1]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 335 | case 1: |
| 336 | positions[left + 1] = positions[left]; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 337 | sortKey[left + 1] = sortKey[left]; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 338 | isDirs[left + 1] = isDirs[left]; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 339 | ids[left + 1] = ids[left]; |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 340 | break; |
| 341 | default: |
| 342 | System.arraycopy(positions, left, positions, left + 1, n); |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 343 | System.arraycopy(sortKey, left, sortKey, left + 1, n); |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 344 | System.arraycopy(isDirs, left, isDirs, left + 1, n); |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 345 | System.arraycopy(ids, left, ids, left + 1, n); |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | positions[left] = pivotPosition; |
Ben Kwa | 6280de0 | 2015-12-16 19:42:08 -0800 | [diff] [blame] | 349 | sortKey[left] = pivotValue; |
Tomasz Mikolajewski | 61e315d | 2016-03-15 13:23:52 +0900 | [diff] [blame] | 350 | isDirs[left] = pivotIsDir; |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 351 | ids[left] = pivotId; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 352 | } |
| 353 | } |
| 354 | |
Ben Kwa | e433834 | 2016-01-08 15:34:47 -0800 | [diff] [blame] | 355 | /** |
Tomasz Mikolajewski | 985df3d | 2016-03-15 15:38:54 +0900 | [diff] [blame] | 356 | * @return Timestamp for the given document. Some docs (e.g. active downloads) have a null |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 357 | * timestamp - these will be replaced with MAX_LONG so that such files get sorted to the top |
| 358 | * when sorting by date. |
Tomasz Mikolajewski | 985df3d | 2016-03-15 15:38:54 +0900 | [diff] [blame] | 359 | */ |
Tomasz Mikolajewski | 06b036f | 2016-04-26 11:11:17 +0900 | [diff] [blame^] | 360 | long getLastModified(Cursor cursor) { |
| 361 | long l = getCursorLong(mCursor, Document.COLUMN_LAST_MODIFIED); |
| 362 | return (l == -1) ? Long.MAX_VALUE : l; |
Ben Kwa | e433834 | 2016-01-08 15:34:47 -0800 | [diff] [blame] | 363 | } |
| 364 | |
Tomasz Mikolajewski | d71bd61 | 2016-02-16 12:28:43 +0900 | [diff] [blame] | 365 | public @Nullable Cursor getItem(String modelId) { |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 366 | Integer pos = mPositions.get(modelId); |
Steve McKay | 5a22a11 | 2016-04-12 11:29:10 -0700 | [diff] [blame] | 367 | if (pos == null) { |
| 368 | if (DEBUG) Log.d(TAG, "Unabled to find cursor position for modelId: " + modelId); |
| 369 | return null; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 370 | } |
Steve McKay | 5a22a11 | 2016-04-12 11:29:10 -0700 | [diff] [blame] | 371 | |
| 372 | if (!mCursor.moveToPosition(pos)) { |
| 373 | if (DEBUG) Log.d(TAG, |
| 374 | "Unabled to move cursor to position " + pos + " for modelId: " + modelId); |
| 375 | return null; |
| 376 | } |
| 377 | |
| 378 | return mCursor; |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 379 | } |
| 380 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 381 | boolean isEmpty() { |
| 382 | return mCursorCount == 0; |
| 383 | } |
| 384 | |
| 385 | boolean isLoading() { |
| 386 | return mIsLoading; |
| 387 | } |
| 388 | |
| 389 | List<DocumentInfo> getDocuments(Selection items) { |
| 390 | final int size = (items != null) ? items.size() : 0; |
| 391 | |
| 392 | final List<DocumentInfo> docs = new ArrayList<>(size); |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 393 | for (String modelId: items.getAll()) { |
| 394 | final Cursor cursor = getItem(modelId); |
Steve McKay | 5a22a11 | 2016-04-12 11:29:10 -0700 | [diff] [blame] | 395 | if (cursor == null) { |
| 396 | Log.w(TAG, |
| 397 | "Skipping document. Unabled to obtain cursor for modelId: " + modelId); |
| 398 | continue; |
| 399 | } |
Steve McKay | 0af8afd | 2016-02-25 13:34:03 -0800 | [diff] [blame] | 400 | docs.add(DocumentInfo.fromDirectoryCursor(cursor)); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 401 | } |
| 402 | return docs; |
| 403 | } |
| 404 | |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 405 | void addUpdateListener(UpdateListener listener) { |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 406 | mUpdateListeners.add(listener); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 407 | } |
| 408 | |
Ben Kwa | 472103f | 2016-02-10 15:48:25 -0800 | [diff] [blame] | 409 | void removeUpdateListener(UpdateListener listener) { |
| 410 | mUpdateListeners.remove(listener); |
| 411 | } |
| 412 | |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 413 | static interface UpdateListener { |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 414 | /** |
| 415 | * Called when a successful update has occurred. |
| 416 | */ |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 417 | void onModelUpdate(Model model); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 418 | |
| 419 | /** |
| 420 | * Called when an update has been attempted but failed. |
| 421 | */ |
Ben Kwa | d72a1da | 2015-12-01 19:56:57 -0800 | [diff] [blame] | 422 | void onModelUpdateFailed(Exception e); |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 423 | } |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 424 | |
| 425 | /** |
| 426 | * @return An ordered array of model IDs representing the documents in the model. It is sorted |
| 427 | * according to the current sort order, which was set by the last model update. |
| 428 | */ |
Tomasz Mikolajewski | f27c274 | 2016-03-07 18:01:45 +0900 | [diff] [blame] | 429 | public String[] getModelIds() { |
Ben Kwa | b8a5e08 | 2015-12-07 13:25:27 -0800 | [diff] [blame] | 430 | return mIds; |
| 431 | } |
Ben Kwa | 0497da8 | 2015-11-30 23:00:02 -0800 | [diff] [blame] | 432 | } |