/** Launches the task that Recents was launched from, if possible */
public boolean launchPreviousTask() {
// Get the first stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
TaskStack stack = stackView.mStack;
ArrayList<Task> tasks = stack.getTasks();
// Find the launch task in the stack
if (!tasks.isEmpty()) {
int taskCount = tasks.size();
for (int j = 0; j < taskCount; j++) {
if (tasks.get(j).isLaunchTarget) {
Task task = tasks.get(j);
TaskView tv = stackView.getChildViewForTask(task);
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
}
return false;
}
/** Launches the task that Recents was launched from, if possible */
public boolean launchPreviousTask() {
Log.d(TAG, "launchPreviousTask: ");
// Get the first stack view
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = 0; i < stackCount; i++) {
TaskStackView stackView = stackViews.get(i);
TaskStack stack = stackView.getStack();
ArrayList<Task> tasks = stack.getTasks();
// Find the launch task in the stack
if (!tasks.isEmpty()) {
int taskCount = tasks.size();
for (int j = 0; j < taskCount; j++) {
if (tasks.get(j).isLaunchTarget) {
Task task = tasks.get(j);
TaskView tv = stackView.getChildViewForTask(task);
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
return false;
}
/** Returns the transition rect for the given task id. */
TaskViewTransform getThumbnailTransitionTransform(
TaskStack stack, TaskStackView stackView, int runningTaskId, Task runningTaskOut) {
// Find the running task in the TaskStack
Task task = null;
ArrayList<Task> tasks = stack.getTasks();
if (runningTaskId != -1) {
// Otherwise, try and find the task with the
int taskCount = tasks.size();
for (int i = taskCount - 1; i >= 0; i--) {
Task t = tasks.get(i);
if (t.key.id == runningTaskId) {
task = t;
runningTaskOut.copyFrom(t);
break;
}
}
}
if (task == null) {
// If no task is specified or we can not find the task just use the front most one
task = tasks.get(tasks.size() - 1);
runningTaskOut.copyFrom(task);
}
// Get the transform for the running task
stackView.getScroller().setStackScrollToInitialState();
mTmpTransform =
stackView
.getStackAlgorithm()
.getStackTransform(task, stackView.getScroller().getStackScroll(), mTmpTransform, null);
return mTmpTransform;
}
/** Dismisses the focused task. */
public void dismissFocusedTask() {
// Return early if there is no focused task index
if (mFocusedTaskIndex < 0) return;
Task t = mStack.getTasks().get(mFocusedTaskIndex);
TaskView tv = getChildViewForTask(t);
tv.dismissTask();
}
/** Updates the min and max virtual scroll bounds */
void updateMinMaxScroll(
boolean boundScrollToNewMinMax, boolean launchedWithAltTab, boolean launchedFromHome) {
// Compute the min and max scroll values
mLayoutAlgorithm.computeMinMaxScroll(mStack.getTasks(), launchedWithAltTab, launchedFromHome);
// Debug logging
if (boundScrollToNewMinMax) {
mStackScroller.boundScroll();
}
}
/** Gets the next task in the stack - or if the last - the top task */
public Task getNextTaskOrTopTask(Task taskToSearch) {
Log.d(TAG, "getNextTaskOrTopTask: ");
Task returnTask = null;
boolean found = false;
List<TaskStackView> stackViews = getTaskStackViews();
int stackCount = stackViews.size();
for (int i = stackCount - 1; i >= 0; --i) {
TaskStack stack = stackViews.get(i).getStack();
ArrayList<Task> taskList = stack.getTasks();
// Iterate the stack views and try and find the focused task
for (int j = taskList.size() - 1; j >= 0; --j) {
Task task = taskList.get(j);
// Return the next task in the line.
if (found) return task;
// Remember the first possible task as the top task.
if (returnTask == null) returnTask = task;
if (task == taskToSearch) found = true;
}
}
return returnTask;
}
/** Focuses the task at the specified index in the stack */
void focusTask(int taskIndex, boolean scrollToNewPosition) {
// Return early if the task is already focused
if (taskIndex == mFocusedTaskIndex) return;
if (0 <= taskIndex && taskIndex < mStack.getTaskCount()) {
mFocusedTaskIndex = taskIndex;
// Focus the view if possible, otherwise, focus the view after we scroll into position
Task t = mStack.getTasks().get(taskIndex);
TaskView tv = getChildViewForTask(t);
Runnable postScrollRunnable = null;
if (tv != null) {
tv.setFocusedTask();
} else {
postScrollRunnable =
new Runnable() {
@Override
public void run() {
Task t = mStack.getTasks().get(mFocusedTaskIndex);
TaskView tv = getChildViewForTask(t);
if (tv != null) {
tv.setFocusedTask();
}
}
};
}
// Scroll the view into position (just center it in the curve)
if (scrollToNewPosition) {
float newScroll = mLayoutAlgorithm.getStackScrollForTask(t) - 0.5f;
newScroll = mStackScroller.getBoundedStackScroll(newScroll);
mStackScroller.animateScroll(
mStackScroller.getStackScroll(), newScroll, postScrollRunnable);
} else {
if (postScrollRunnable != null) {
postScrollRunnable.run();
}
}
}
}
@Override
public void onTaskViewDismissed(TaskView tv) {
Task task = tv.getTask();
int taskIndex = mStack.indexOfTask(task);
boolean taskWasFocused = tv.isFocusedTask();
// Announce for accessibility
tv.announceForAccessibility(
getContext()
.getString(R.string.accessibility_recents_item_dismissed, tv.getTask().activityLabel));
// Remove the task from the view
mStack.removeTask(task);
// If the dismissed task was focused, then we should focus the next task in front
if (taskWasFocused) {
ArrayList<Task> tasks = mStack.getTasks();
int nextTaskIndex = Math.min(tasks.size() - 1, taskIndex);
if (nextTaskIndex >= 0) {
Task nextTask = tasks.get(nextTaskIndex);
TaskView nextTv = getChildViewForTask(nextTask);
nextTv.setFocusedTask();
}
}
}
/** ** RecentsPackageMonitor.PackageCallbacks Implementation *** */
@Override
public void onComponentRemoved(HashSet<ComponentName> cns) {
// For other tasks, just remove them directly if they no longer exist
ArrayList<Task> tasks = mStack.getTasks();
for (int i = tasks.size() - 1; i >= 0; i--) {
final Task t = tasks.get(i);
if (cns.contains(t.key.baseIntent.getComponent())) {
TaskView tv = getChildViewForTask(t);
if (tv != null) {
// For visible children, defer removing the task until after the animation
tv.startDeleteTaskAnimation(
new Runnable() {
@Override
public void run() {
mStack.removeTask(t);
}
});
} else {
// Otherwise, remove the task from the stack immediately
mStack.removeTask(t);
}
}
}
}
/** Synchronizes the views with the model */
boolean synchronizeStackViewsWithModel() {
if (mStackViewsDirty) {
RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
SystemServicesProxy ssp = loader.getSystemServicesProxy();
// Get all the task transforms
ArrayList<Task> tasks = mStack.getTasks();
float stackScroll = mStackScroller.getStackScroll();
int[] visibleRange = mTmpVisibleRange;
boolean isValidVisibleRange =
updateStackTransforms(mCurrentTaskTransforms, tasks, stackScroll, visibleRange, false);
if (mDebugOverlay != null) {
mDebugOverlay.setText("vis[" + visibleRange[1] + "-" + visibleRange[0] + "]");
}
// Return all the invisible children to the pool
mTmpTaskViewMap.clear();
int childCount = getChildCount();
for (int i = childCount - 1; i >= 0; i--) {
TaskView tv = (TaskView) getChildAt(i);
Task task = tv.getTask();
int taskIndex = mStack.indexOfTask(task);
if (visibleRange[1] <= taskIndex && taskIndex <= visibleRange[0]) {
mTmpTaskViewMap.put(task, tv);
} else {
mViewPool.returnViewToPool(tv);
}
}
// Pick up all the newly visible children and update all the existing children
for (int i = visibleRange[0]; isValidVisibleRange && i >= visibleRange[1]; i--) {
Task task = tasks.get(i);
TaskViewTransform transform = mCurrentTaskTransforms.get(i);
TaskView tv = mTmpTaskViewMap.get(task);
int taskIndex = mStack.indexOfTask(task);
if (tv == null) {
tv = mViewPool.pickUpViewFromPool(task, task);
if (mStackViewsAnimationDuration > 0) {
// For items in the list, put them in start animating them from the
// approriate ends of the list where they are expected to appear
if (Float.compare(transform.p, 0f) <= 0) {
mLayoutAlgorithm.getStackTransform(0f, 0f, mTmpTransform, null);
} else {
mLayoutAlgorithm.getStackTransform(1f, 0f, mTmpTransform, null);
}
tv.updateViewPropertiesToTaskTransform(mTmpTransform, 0);
}
}
// Animate the task into place
tv.updateViewPropertiesToTaskTransform(
mCurrentTaskTransforms.get(taskIndex),
mStackViewsAnimationDuration,
mRequestUpdateClippingListener);
// Request accessibility focus on the next view if we removed the task
// that previously held accessibility focus
childCount = getChildCount();
if (childCount > 0 && ssp.isTouchExplorationEnabled()) {
TaskView atv = (TaskView) getChildAt(childCount - 1);
int indexOfTask = mStack.indexOfTask(atv.getTask());
if (mPrevAccessibilityFocusedIndex != indexOfTask) {
tv.requestAccessibilityFocus();
mPrevAccessibilityFocusedIndex = indexOfTask;
}
}
}
// Reset the request-synchronize params
mStackViewsAnimationDuration = 0;
mStackViewsDirty = false;
mStackViewsClipDirty = true;
return true;
}
return false;
}
void showRelativeAffiliatedTask(boolean showNextTask) {
// Return early if there is no focused stack
int focusedStackId = mSystemServicesProxy.getFocusedStack();
TaskStack focusedStack = null;
RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext);
loader.preloadTasks(plan, true /* isTopTaskHome */);
if (mConfig.multiStackEnabled) {
if (focusedStackId < 0) return;
focusedStack = plan.getTaskStack(focusedStackId);
} else {
focusedStack = plan.getAllTaskStacks().get(0);
}
// Return early if there are no tasks in the focused stack
if (focusedStack == null || focusedStack.getTaskCount() == 0) return;
ActivityManager.RunningTaskInfo runningTask = mSystemServicesProxy.getTopMostTask();
// Return early if there is no running task (can't determine affiliated tasks in this case)
if (runningTask == null) return;
// Return early if the running task is in the home stack (optimization)
if (mSystemServicesProxy.isInHomeStack(runningTask.id)) return;
// Find the task in the recents list
ArrayList<Task> tasks = focusedStack.getTasks();
Task toTask = null;
ActivityOptions launchOpts = null;
int taskCount = tasks.size();
int numAffiliatedTasks = 0;
for (int i = 0; i < taskCount; i++) {
Task task = tasks.get(i);
if (task.key.id == runningTask.id) {
TaskGrouping group = task.group;
Task.TaskKey toTaskKey;
if (showNextTask) {
toTaskKey = group.getNextTaskInGroup(task);
launchOpts =
ActivityOptions.makeCustomAnimation(
mContext,
R.anim.recents_launch_next_affiliated_task_target,
R.anim.recents_launch_next_affiliated_task_source);
} else {
toTaskKey = group.getPrevTaskInGroup(task);
launchOpts =
ActivityOptions.makeCustomAnimation(
mContext,
R.anim.recents_launch_prev_affiliated_task_target,
R.anim.recents_launch_prev_affiliated_task_source);
}
if (toTaskKey != null) {
toTask = focusedStack.findTaskWithId(toTaskKey.id);
}
numAffiliatedTasks = group.getTaskCount();
break;
}
}
// Return early if there is no next task
if (toTask == null) {
if (numAffiliatedTasks > 1) {
if (showNextTask) {
mSystemServicesProxy.startInPlaceAnimationOnFrontMostApplication(
ActivityOptions.makeCustomInPlaceAnimation(
mContext, R.anim.recents_launch_next_affiliated_task_bounce));
} else {
mSystemServicesProxy.startInPlaceAnimationOnFrontMostApplication(
ActivityOptions.makeCustomInPlaceAnimation(
mContext, R.anim.recents_launch_prev_affiliated_task_bounce));
}
}
return;
}
// Keep track of actually launched affiliated tasks
MetricsLogger.count(mContext, "overview_affiliated_task_launch", 1);
// Launch the task
if (toTask.isActive) {
// Bring an active task to the foreground
mSystemServicesProxy.moveTaskToFront(toTask.key.id, launchOpts);
} else {
mSystemServicesProxy.startActivityFromRecents(
mContext, toTask.key.id, toTask.activityLabel, launchOpts);
}
}