| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.server.wm; |
| |
| import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME; |
| import static android.app.WindowConfiguration.ACTIVITY_TYPE_RECENTS; |
| |
| import android.app.ActivityManager.RunningTaskInfo; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.util.ArraySet; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| /** |
| * Class for resolving the set of running tasks in the system. |
| */ |
| class RunningTasks implements Consumer<Task> { |
| |
| static final int FLAG_FILTER_ONLY_VISIBLE_RECENTS = 1; |
| static final int FLAG_ALLOWED = 1 << 1; |
| static final int FLAG_CROSS_USERS = 1 << 2; |
| static final int FLAG_KEEP_INTENT_EXTRA = 1 << 3; |
| |
| // Tasks are sorted in order {focusedVisibleTasks, visibleTasks, invisibleTasks}. |
| private final ArrayList<Task> mTmpSortedTasks = new ArrayList<>(); |
| // mTmpVisibleTasks, mTmpInvisibleTasks and mTmpFocusedTasks are sorted from top |
| // to bottom. |
| private final ArrayList<Task> mTmpVisibleTasks = new ArrayList<>(); |
| private final ArrayList<Task> mTmpInvisibleTasks = new ArrayList<>(); |
| private final ArrayList<Task> mTmpFocusedTasks = new ArrayList<>(); |
| |
| private int mCallingUid; |
| private int mUserId; |
| private boolean mCrossUser; |
| private ArraySet<Integer> mProfileIds; |
| private boolean mAllowed; |
| private boolean mFilterOnlyVisibleRecents; |
| private RecentTasks mRecentTasks; |
| private boolean mKeepIntentExtra; |
| |
| void getTasks(int maxNum, List<RunningTaskInfo> list, int flags, RecentTasks recentTasks, |
| WindowContainer<?> root, int callingUid, ArraySet<Integer> profileIds) { |
| // Return early if there are no tasks to fetch |
| if (maxNum <= 0) { |
| return; |
| } |
| |
| mCallingUid = callingUid; |
| mUserId = UserHandle.getUserId(callingUid); |
| mCrossUser = (flags & FLAG_CROSS_USERS) == FLAG_CROSS_USERS; |
| mProfileIds = profileIds; |
| mAllowed = (flags & FLAG_ALLOWED) == FLAG_ALLOWED; |
| mFilterOnlyVisibleRecents = |
| (flags & FLAG_FILTER_ONLY_VISIBLE_RECENTS) == FLAG_FILTER_ONLY_VISIBLE_RECENTS; |
| mRecentTasks = recentTasks; |
| mKeepIntentExtra = (flags & FLAG_KEEP_INTENT_EXTRA) == FLAG_KEEP_INTENT_EXTRA; |
| |
| if (root instanceof RootWindowContainer) { |
| ((RootWindowContainer) root).forAllDisplays(dc -> { |
| final Task focusedTask = dc.mFocusedApp != null ? dc.mFocusedApp.getTask() : null; |
| if (focusedTask != null) { |
| mTmpFocusedTasks.add(focusedTask); |
| } |
| processTaskInWindowContainer(dc); |
| }); |
| } else { |
| final DisplayContent dc = root.getDisplayContent(); |
| final Task focusedTask = dc != null |
| ? (dc.mFocusedApp != null ? dc.mFocusedApp.getTask() : null) |
| : null; |
| // May not be include focusedTask if root is DisplayArea. |
| final boolean rootContainsFocusedTask = focusedTask != null |
| && focusedTask.isDescendantOf(root); |
| if (rootContainsFocusedTask) { |
| mTmpFocusedTasks.add(focusedTask); |
| } |
| processTaskInWindowContainer(root); |
| } |
| |
| final int visibleTaskCount = mTmpVisibleTasks.size(); |
| for (int i = 0; i < mTmpFocusedTasks.size(); i++) { |
| final Task focusedTask = mTmpFocusedTasks.get(i); |
| final boolean containsFocusedTask = mTmpVisibleTasks.remove(focusedTask); |
| if (containsFocusedTask) { |
| // Put the visible focused task at the first position. |
| mTmpSortedTasks.add(focusedTask); |
| } |
| } |
| if (!mTmpVisibleTasks.isEmpty()) { |
| mTmpSortedTasks.addAll(mTmpVisibleTasks); |
| } |
| if (!mTmpInvisibleTasks.isEmpty()) { |
| mTmpSortedTasks.addAll(mTmpInvisibleTasks); |
| } |
| |
| // Take the first {@param maxNum} tasks and create running task infos for them |
| final int size = Math.min(maxNum, mTmpSortedTasks.size()); |
| final long now = SystemClock.elapsedRealtime(); |
| for (int i = 0; i < size; i++) { |
| final Task task = mTmpSortedTasks.get(i); |
| // Override the last active to current time for the visible tasks because the visible |
| // tasks can be considered to be currently active, the values are descending as |
| // the item order. |
| final long visibleActiveTime = i < visibleTaskCount ? now + size - i : -1; |
| list.add(createRunningTaskInfo(task, visibleActiveTime)); |
| } |
| |
| mTmpFocusedTasks.clear(); |
| mTmpVisibleTasks.clear(); |
| mTmpInvisibleTasks.clear(); |
| mTmpSortedTasks.clear(); |
| } |
| |
| private void processTaskInWindowContainer(WindowContainer wc) { |
| wc.forAllLeafTasks(this, true /* traverseTopToBottom */); |
| } |
| |
| @Override |
| public void accept(Task task) { |
| if (task.getTopNonFinishingActivity() == null) { |
| // Skip if there are no activities in the task |
| return; |
| } |
| if (task.effectiveUid != mCallingUid) { |
| if (task.mUserId != mUserId && !mCrossUser && !mProfileIds.contains(task.mUserId)) { |
| // Skip if the caller does not have cross user permission or cannot access |
| // the task's profile |
| return; |
| } |
| if (!mAllowed) { |
| // Skip if the caller isn't allowed to fetch this task |
| return; |
| } |
| } |
| if (mFilterOnlyVisibleRecents |
| && task.getActivityType() != ACTIVITY_TYPE_HOME |
| && task.getActivityType() != ACTIVITY_TYPE_RECENTS |
| && !mRecentTasks.isVisibleRecentTask(task)) { |
| // Skip if this task wouldn't be visibile (ever) from recents, with an exception for the |
| // home & recent tasks |
| return; |
| } |
| if (task.isVisible()) { |
| mTmpVisibleTasks.add(task); |
| } else { |
| mTmpInvisibleTasks.add(task); |
| } |
| } |
| |
| /** Constructs a {@link RunningTaskInfo} from a given {@param task}. */ |
| private RunningTaskInfo createRunningTaskInfo(Task task, long visibleActiveTime) { |
| final RunningTaskInfo rti = new RunningTaskInfo(); |
| task.fillTaskInfo(rti, !mKeepIntentExtra); |
| if (visibleActiveTime > 0) { |
| rti.lastActiveTime = visibleActiveTime; |
| } |
| // Fill in some deprecated values |
| rti.id = rti.taskId; |
| |
| if (!mAllowed) { |
| Task.trimIneffectiveInfo(task, rti); |
| } |
| return rti; |
| } |
| } |