/*
* Copyright (C) 2014 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.systemui.recents.views;
import android.app.ActivityOptions;
import android.app.TaskStackBuilder;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.net.Uri;
import android.os.UserHandle;
import android.provider.Settings;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowInsets;
import android.widget.FrameLayout;
import com.android.systemui.recents.Constants;
import com.android.systemui.recents.RecentsConfiguration;
import com.android.systemui.recents.misc.SystemServicesProxy;
import com.android.systemui.recents.model.RecentsPackageMonitor;
import com.android.systemui.recents.model.RecentsTaskLoader;
import com.android.systemui.recents.model.Task;
import com.android.systemui.recents.model.TaskStack;
import java.util.ArrayList;
/**
* This view is the the top level layout that contains TaskStacks (which are laid out according
* to their SpaceNode bounds.
*/
public class RecentsView extends FrameLayout implements TaskStackView.TaskStackViewCallbacks,
RecentsPackageMonitor.PackageCallbacks {
/** The RecentsView callbacks */
public interface RecentsViewCallbacks {
public void onTaskViewClicked();
public void onTaskLaunchFailed();
public void onAllTaskViewsDismissed();
public void onExitToHomeAnimationTriggered();
public void onScreenPinningRequest();
}
RecentsConfiguration mConfig;
LayoutInflater mInflater;
DebugOverlayView mDebugOverlay;
ArrayList<TaskStack> mStacks;
View mSearchBar;
RecentsViewCallbacks mCb;
public RecentsView(Context context) {
super(context);
}
public RecentsView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RecentsView(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}
public RecentsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
mConfig = RecentsConfiguration.getInstance();
mInflater = LayoutInflater.from(context);
}
/** Sets the callbacks */
public void setCallbacks(RecentsViewCallbacks cb) {
mCb = cb;
}
/** Sets the debug overlay */
public void setDebugOverlay(DebugOverlayView overlay) {
mDebugOverlay = overlay;
}
/** Set/get the bsp root node */
public void setTaskStacks(ArrayList<TaskStack> stacks) {
int numStacks = stacks.size();
// Make a list of the stack view children only
ArrayList<TaskStackView> stackViews = new ArrayList<TaskStackView>();
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
stackViews.add((TaskStackView) child);
}
}
// Remove all/extra stack views
int numTaskStacksToKeep = 0; // Keep no tasks if we are recreating the layout
if (mConfig.launchedReuseTaskStackViews) {
numTaskStacksToKeep = Math.min(childCount, numStacks);
}
for (int i = stackViews.size() - 1; i >= numTaskStacksToKeep; i--) {
removeView(stackViews.get(i));
stackViews.remove(i);
}
// Update the stack views that we are keeping
for (int i = 0; i < numTaskStacksToKeep; i++) {
TaskStackView tsv = stackViews.get(i);
// If onRecentsHidden is not triggered, we need to the stack view again here
tsv.reset();
tsv.setStack(stacks.get(i));
}
// Add remaining/recreate stack views
mStacks = stacks;
for (int i = stackViews.size(); i < numStacks; i++) {
TaskStack stack = stacks.get(i);
TaskStackView stackView = new TaskStackView(getContext(), stack);
stackView.setCallbacks(this);
addView(stackView);
}
// Enable debug mode drawing on all the stacks if necessary
if (mConfig.debugModeEnabled) {
for (int i = childCount - 1; i >= 0; i--) {
View v = getChildAt(i);
if (v != mSearchBar) {
TaskStackView stackView = (TaskStackView) v;
stackView.setDebugOverlay(mDebugOverlay);
}
}
}
// Trigger a new layout
requestLayout();
}
/** Launches the focused task from the first stack if possible */
public boolean launchFocusedTask() {
// 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;
// Iterate the stack views and try and find the focused task
int taskCount = stackView.getChildCount();
for (int j = 0; j < taskCount; j++) {
TaskView tv = (TaskView) stackView.getChildAt(j);
Task task = tv.getTask();
if (tv.isFocusedTask()) {
onTaskViewClicked(stackView, tv, stack, task, false);
return true;
}
}
}
}
return false;
}
/** 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;
}
/** Requests all task stacks to start their enter-recents animation */
public void startEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx) {
// We have to increment/decrement the post animation trigger in case there are no children
// to ensure that it runs
ctx.postAnimationTrigger.increment();
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.startEnterRecentsAnimation(ctx);
}
}
ctx.postAnimationTrigger.decrement();
}
/** Requests all task stacks to start their exit-recents animation */
public void startExitToHomeAnimation(ViewAnimation.TaskViewExitContext ctx) {
// We have to increment/decrement the post animation trigger in case there are no children
// to ensure that it runs
ctx.postAnimationTrigger.increment();
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.startExitToHomeAnimation(ctx);
}
}
ctx.postAnimationTrigger.decrement();
// Notify of the exit animation
mCb.onExitToHomeAnimationTriggered();
}
/** Adds the search bar */
public void setSearchBar(View searchBar) {
// Create the search bar (and hide it if we have no recent tasks)
if (Constants.DebugFlags.App.EnableSearchLayout) {
// Remove the previous search bar if one exists
if (mSearchBar != null && indexOfChild(mSearchBar) > -1) {
removeView(mSearchBar);
}
// Add the new search bar
if (searchBar != null) {
mSearchBar = searchBar;
addView(mSearchBar);
}
}
}
/** Returns whether there is currently a search bar */
public boolean hasSearchBar() {
return mSearchBar != null;
}
/** Sets the visibility of the search bar */
public void setSearchBarVisibility(int visibility) {
if (mSearchBar != null) {
mSearchBar.setVisibility(visibility);
// Always bring the search bar to the top
mSearchBar.bringToFront();
}
}
/**
* This is called with the full size of the window since we are handling our own insets.
*/
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
// Get the search bar bounds and measure the search bar layout
if (mSearchBar != null) {
Rect searchBarSpaceBounds = new Rect();
mConfig.getSearchBarBounds(width, height, mConfig.systemInsets.top, searchBarSpaceBounds);
mSearchBar.measure(
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.width(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.height(), MeasureSpec.EXACTLY));
}
Rect taskStackBounds = new Rect();
mConfig.getTaskStackBounds(width, height, mConfig.systemInsets.top,
mConfig.systemInsets.right, taskStackBounds);
// Measure each TaskStackView with the full width and height of the window since the
// transition view is a child of that stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar && child.getVisibility() != GONE) {
TaskStackView tsv = (TaskStackView) child;
// Set the insets to be the top/left inset + search bounds
tsv.setStackInsetRect(taskStackBounds);
tsv.measure(widthMeasureSpec, heightMeasureSpec);
}
}
setMeasuredDimension(width, height);
}
/**
* This is called with the full size of the window since we are handling our own insets.
*/
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
// Get the search bar bounds so that we lay it out
if (mSearchBar != null) {
Rect searchBarSpaceBounds = new Rect();
mConfig.getSearchBarBounds(getMeasuredWidth(), getMeasuredHeight(),
mConfig.systemInsets.top, searchBarSpaceBounds);
mSearchBar.layout(searchBarSpaceBounds.left, searchBarSpaceBounds.top,
searchBarSpaceBounds.right, searchBarSpaceBounds.bottom);
}
// Layout each TaskStackView with the full width and height of the window since the
// transition view is a child of that stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar && child.getVisibility() != GONE) {
child.layout(left, top, left + child.getMeasuredWidth(),
top + child.getMeasuredHeight());
}
}
}
@Override
public WindowInsets onApplyWindowInsets(WindowInsets insets) {
// Update the configuration with the latest system insets and trigger a relayout
mConfig.updateSystemInsets(insets.getSystemWindowInsets());
requestLayout();
return insets.consumeSystemWindowInsets();
}
/** Notifies each task view of the user interaction. */
public void onUserInteraction() {
// 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;
stackView.onUserInteraction();
}
}
}
/** Focuses the next task in the first stack view */
public void focusNextTask(boolean forward) {
// 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;
stackView.focusNextTask(forward, true);
break;
}
}
}
/** Dismisses the focused task. */
public void dismissFocusedTask() {
// 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;
stackView.dismissFocusedTask();
break;
}
}
}
/** Unfilters any filtered stacks */
public boolean unfilterFilteredStacks() {
if (mStacks != null) {
// Check if there are any filtered stacks and unfilter them before we back out of Recents
boolean stacksUnfiltered = false;
int numStacks = mStacks.size();
for (int i = 0; i < numStacks; i++) {
TaskStack stack = mStacks.get(i);
if (stack.hasFilteredTasks()) {
stack.unfilterTasks();
stacksUnfiltered = true;
}
}
return stacksUnfiltered;
}
return false;
}
/**** TaskStackView.TaskStackCallbacks Implementation ****/
@Override
public void onTaskViewClicked(final TaskStackView stackView, final TaskView tv,
final TaskStack stack, final Task task, final boolean lockToTask) {
// Notify any callbacks of the launching of a new task
if (mCb != null) {
mCb.onTaskViewClicked();
}
// Upfront the processing of the thumbnail
TaskViewTransform transform = new TaskViewTransform();
View sourceView;
int offsetX = 0;
int offsetY = 0;
float stackScroll = stackView.getScroller().getStackScroll();
if (tv == null) {
// If there is no actual task view, then use the stack view as the source view
// and then offset to the expected transform rect, but bound this to just
// outside the display rect (to ensure we don't animate from too far away)
sourceView = stackView;
transform = stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
offsetX = transform.rect.left;
offsetY = mConfig.displayRect.height();
} else {
sourceView = tv.mThumbnailView;
transform = stackView.getStackAlgorithm().getStackTransform(task, stackScroll, transform, null);
}
// Compute the thumbnail to scale up from
final SystemServicesProxy ssp =
RecentsTaskLoader.getInstance().getSystemServicesProxy();
ActivityOptions opts = null;
if (task.thumbnail != null && task.thumbnail.getWidth() > 0 &&
task.thumbnail.getHeight() > 0) {
Bitmap b;
if (tv != null) {
// Disable any focused state before we draw the header
if (tv.isFocusedTask()) {
tv.unsetFocusedTask();
}
float scale = tv.getScaleX();
int fromHeaderWidth = (int) (tv.mHeaderView.getMeasuredWidth() * scale);
int fromHeaderHeight = (int) (tv.mHeaderView.getMeasuredHeight() * scale);
b = Bitmap.createBitmap(fromHeaderWidth, fromHeaderHeight,
Bitmap.Config.ARGB_8888);
if (Constants.DebugFlags.App.EnableTransitionThumbnailDebugMode) {
b.eraseColor(0xFFff0000);
} else {
Canvas c = new Canvas(b);
c.scale(tv.getScaleX(), tv.getScaleY());
tv.mHeaderView.draw(c);
c.setBitmap(null);
}
} else {
// Notify the system to skip the thumbnail layer by using an ALPHA_8 bitmap
b = Bitmap.createBitmap(1, 1, Bitmap.Config.ALPHA_8);
}
ActivityOptions.OnAnimationStartedListener animStartedListener = null;
if (lockToTask) {
animStartedListener = new ActivityOptions.OnAnimationStartedListener() {
boolean mTriggered = false;
@Override
public void onAnimationStarted() {
if (!mTriggered) {
postDelayed(new Runnable() {
@Override
public void run() {
mCb.onScreenPinningRequest();
}
}, 350);
mTriggered = true;
}
}
};
}
opts = ActivityOptions.makeThumbnailAspectScaleUpAnimation(sourceView,
b, offsetX, offsetY, transform.rect.width(), transform.rect.height(),
sourceView.getHandler(), animStartedListener);
}
final ActivityOptions launchOpts = opts;
final Runnable launchRunnable = new Runnable() {
@Override
public void run() {
if (task.isActive) {
// Bring an active task to the foreground
ssp.moveTaskToFront(task.key.id, launchOpts);
} else {
if (ssp.startActivityFromRecents(getContext(), task.key.id,
task.activityLabel, launchOpts)) {
if (launchOpts == null && lockToTask) {
mCb.onScreenPinningRequest();
}
} else {
// Dismiss the task and return the user to home if we fail to
// launch the task
onTaskViewDismissed(task);
if (mCb != null) {
mCb.onTaskLaunchFailed();
}
}
}
}
};
// Launch the app right away if there is no task view, otherwise, animate the icon out first
if (tv == null) {
launchRunnable.run();
} else {
if (!task.group.isFrontMostTask(task)) {
// For affiliated tasks that are behind other tasks, we must animate the front cards
// out of view before starting the task transition
stackView.startLaunchTaskAnimation(tv, launchRunnable, lockToTask);
} else {
// Otherwise, we can start the task transition immediately
stackView.startLaunchTaskAnimation(tv, null, lockToTask);
launchRunnable.run();
}
}
}
@Override
public void onTaskViewAppInfoClicked(Task t) {
// Create a new task stack with the application info details activity
Intent baseIntent = t.key.baseIntent;
Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
Uri.fromParts("package", baseIntent.getComponent().getPackageName(), null));
intent.setComponent(intent.resolveActivity(getContext().getPackageManager()));
TaskStackBuilder.create(getContext())
.addNextIntentWithParentStack(intent).startActivities(null,
new UserHandle(t.key.userId));
}
@Override
public void onTaskViewDismissed(Task t) {
// Remove any stored data from the loader. We currently don't bother notifying the views
// that the data has been unloaded because at the point we call onTaskViewDismissed(), the views
// either don't need to be updated, or have already been removed.
RecentsTaskLoader loader = RecentsTaskLoader.getInstance();
loader.deleteTaskData(t, false);
// Remove the old task from activity manager
loader.getSystemServicesProxy().removeTask(t.key.id);
}
@Override
public void onAllTaskViewsDismissed() {
mCb.onAllTaskViewsDismissed();
}
/** Final callback after Recents is finally hidden. */
public void onRecentsHidden() {
// Notify each task stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.onRecentsHidden();
}
}
}
@Override
public void onTaskStackFilterTriggered() {
// Hide the search bar
if (mSearchBar != null) {
mSearchBar.animate()
.alpha(0f)
.setStartDelay(0)
.setInterpolator(mConfig.fastOutSlowInInterpolator)
.setDuration(mConfig.filteringCurrentViewsAnimDuration)
.withLayer()
.start();
}
}
@Override
public void onTaskStackUnfilterTriggered() {
// Show the search bar
if (mSearchBar != null) {
mSearchBar.animate()
.alpha(1f)
.setStartDelay(0)
.setInterpolator(mConfig.fastOutSlowInInterpolator)
.setDuration(mConfig.filteringNewViewsAnimDuration)
.withLayer()
.start();
}
}
/**** RecentsPackageMonitor.PackageCallbacks Implementation ****/
@Override
public void onPackagesChanged(RecentsPackageMonitor monitor, String packageName, int userId) {
// Propagate this event down to each task stack view
int childCount = getChildCount();
for (int i = 0; i < childCount; i++) {
View child = getChildAt(i);
if (child != mSearchBar) {
TaskStackView stackView = (TaskStackView) child;
stackView.onPackagesChanged(monitor, packageName, userId);
}
}
}
}
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