Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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.service.autofill; |
| 18 | |
Felipe Leme | 9f9ee25 | 2017-04-27 13:56:22 -0700 | [diff] [blame] | 19 | import static android.view.autofill.Helper.sDebug; |
Philip P. Moltmann | c761963 | 2017-04-25 11:57:37 -0700 | [diff] [blame] | 20 | |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 21 | import android.annotation.NonNull; |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 22 | import android.annotation.Nullable; |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 23 | import android.app.assist.AssistStructure; |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 24 | import android.app.assist.AssistStructure.ViewNode; |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 25 | import android.os.Bundle; |
| 26 | import android.os.CancellationSignal; |
| 27 | import android.os.Parcel; |
| 28 | import android.os.Parcelable; |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 29 | import android.util.ArrayMap; |
| 30 | import android.util.SparseIntArray; |
| 31 | import android.view.autofill.AutofillId; |
| 32 | |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 33 | import java.util.LinkedList; |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 34 | |
| 35 | /** |
| 36 | * This class represents a context for each fill request made via {@link |
| 37 | * AutofillService#onFillRequest(FillRequest, CancellationSignal, FillCallback)}. |
| 38 | * It contains a snapshot of the UI state, the view ids that were returned by |
| 39 | * the {@link AutofillService autofill service} as both required to trigger a save |
| 40 | * and optional that can be saved, and the id of the corresponding {@link |
| 41 | * FillRequest}. |
| 42 | * <p> |
| 43 | * This context allows you to inspect the values for the interesting views |
| 44 | * in the context they appeared. Also a reference to the corresponding fill |
| 45 | * request is useful to store meta-data in the client state bundle passed |
| 46 | * to {@link FillResponse.Builder#setClientState(Bundle)} to avoid interpreting |
| 47 | * the UI state again while saving. |
| 48 | */ |
| 49 | public final class FillContext implements Parcelable { |
| 50 | private final int mRequestId; |
| 51 | private final @NonNull AssistStructure mStructure; |
| 52 | |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 53 | /** |
| 54 | * Lookup table AutofillId->ViewNode to speed up {@link #findViewNodesByAutofillIds} |
| 55 | * This is purely a cache and can be deleted at any time |
| 56 | */ |
| 57 | @Nullable private ArrayMap<AutofillId, AssistStructure.ViewNode> mViewNodeLookupTable; |
| 58 | |
| 59 | |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 60 | /** @hide */ |
| 61 | public FillContext(int requestId, @NonNull AssistStructure structure) { |
| 62 | mRequestId = requestId; |
| 63 | mStructure = structure; |
| 64 | } |
| 65 | |
| 66 | private FillContext(Parcel parcel) { |
| 67 | this(parcel.readInt(), parcel.readParcelable(null)); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Gets the id of the {@link FillRequest fill request} this context |
| 72 | * corresponds to. This is useful to associate your custom client |
| 73 | * state with every request to avoid reinterpreting the UI when saving |
| 74 | * user data. |
| 75 | * |
| 76 | * @return The request id. |
| 77 | */ |
| 78 | public int getRequestId() { |
| 79 | return mRequestId; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * @return The screen content. |
| 84 | */ |
| 85 | public AssistStructure getStructure() { |
| 86 | return mStructure; |
| 87 | } |
| 88 | |
| 89 | @Override |
Philip P. Moltmann | c761963 | 2017-04-25 11:57:37 -0700 | [diff] [blame] | 90 | public String toString() { |
Felipe Leme | 9f9ee25 | 2017-04-27 13:56:22 -0700 | [diff] [blame] | 91 | if (!sDebug) return super.toString(); |
Felipe Leme | 0aa4c50 | 2017-04-26 12:36:01 -0700 | [diff] [blame] | 92 | |
| 93 | return "FillContext [reqId=" + mRequestId + "]"; |
Philip P. Moltmann | c761963 | 2017-04-25 11:57:37 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | @Override |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 97 | public int describeContents() { |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | @Override |
| 102 | public void writeToParcel(Parcel parcel, int flags) { |
| 103 | parcel.writeInt(mRequestId); |
| 104 | parcel.writeParcelable(mStructure, flags); |
| 105 | } |
| 106 | |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 107 | /** |
Felipe Leme | 94b5620 | 2017-06-16 11:49:48 -0700 | [diff] [blame] | 108 | * Finds {@link ViewNode ViewNodes} that have the requested ids. |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 109 | * |
Felipe Leme | 94b5620 | 2017-06-16 11:49:48 -0700 | [diff] [blame] | 110 | * @param ids The ids of the node to find. |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 111 | * |
Felipe Leme | 94b5620 | 2017-06-16 11:49:48 -0700 | [diff] [blame] | 112 | * @return The nodes indexed in the same way as the ids. |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 113 | * |
| 114 | * @hide |
| 115 | */ |
Felipe Leme | 94b5620 | 2017-06-16 11:49:48 -0700 | [diff] [blame] | 116 | @NonNull public ViewNode[] findViewNodesByAutofillIds(@NonNull AutofillId[] ids) { |
Philip P. Moltmann | 22567d3 | 2017-05-09 12:56:50 -0700 | [diff] [blame] | 117 | final LinkedList<ViewNode> nodesToProcess = new LinkedList<>(); |
| 118 | final ViewNode[] foundNodes = new AssistStructure.ViewNode[ids.length]; |
| 119 | |
| 120 | // Indexes of foundNodes that are not found yet |
| 121 | final SparseIntArray missingNodeIndexes = new SparseIntArray(ids.length); |
| 122 | |
| 123 | for (int i = 0; i < ids.length; i++) { |
| 124 | if (mViewNodeLookupTable != null) { |
| 125 | int lookupTableIndex = mViewNodeLookupTable.indexOfKey(ids[i]); |
| 126 | |
| 127 | if (lookupTableIndex >= 0) { |
| 128 | foundNodes[i] = mViewNodeLookupTable.valueAt(lookupTableIndex); |
| 129 | } else { |
| 130 | missingNodeIndexes.put(i, /* ignored */ 0); |
| 131 | } |
| 132 | } else { |
| 133 | missingNodeIndexes.put(i, /* ignored */ 0); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | final int numWindowNodes = mStructure.getWindowNodeCount(); |
| 138 | for (int i = 0; i < numWindowNodes; i++) { |
| 139 | nodesToProcess.add(mStructure.getWindowNodeAt(i).getRootViewNode()); |
| 140 | } |
| 141 | |
| 142 | while (missingNodeIndexes.size() > 0 && !nodesToProcess.isEmpty()) { |
| 143 | final ViewNode node = nodesToProcess.removeFirst(); |
| 144 | |
| 145 | for (int i = 0; i < missingNodeIndexes.size(); i++) { |
| 146 | final int index = missingNodeIndexes.keyAt(i); |
| 147 | final AutofillId id = ids[index]; |
| 148 | |
| 149 | if (id.equals(node.getAutofillId())) { |
| 150 | foundNodes[index] = node; |
| 151 | |
| 152 | if (mViewNodeLookupTable == null) { |
| 153 | mViewNodeLookupTable = new ArrayMap<>(ids.length); |
| 154 | } |
| 155 | |
| 156 | mViewNodeLookupTable.put(id, node); |
| 157 | |
| 158 | missingNodeIndexes.removeAt(i); |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | for (int i = 0; i < node.getChildCount(); i++) { |
| 164 | nodesToProcess.addLast(node.getChildAt(i)); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | // Remember which ids could not be resolved to not search for them again the next time |
| 169 | for (int i = 0; i < missingNodeIndexes.size(); i++) { |
| 170 | if (mViewNodeLookupTable == null) { |
| 171 | mViewNodeLookupTable = new ArrayMap<>(missingNodeIndexes.size()); |
| 172 | } |
| 173 | |
| 174 | mViewNodeLookupTable.put(ids[missingNodeIndexes.keyAt(i)], null); |
| 175 | } |
| 176 | |
| 177 | return foundNodes; |
| 178 | } |
| 179 | |
Svet Ganov | 013efe1 | 2017-04-13 21:56:16 -0700 | [diff] [blame] | 180 | public static final Parcelable.Creator<FillContext> CREATOR = |
| 181 | new Parcelable.Creator<FillContext>() { |
| 182 | @Override |
| 183 | public FillContext createFromParcel(Parcel parcel) { |
| 184 | return new FillContext(parcel); |
| 185 | } |
| 186 | |
| 187 | @Override |
| 188 | public FillContext[] newArray(int size) { |
| 189 | return new FillContext[size]; |
| 190 | } |
| 191 | }; |
| 192 | } |