RecentsView.java revision 479f7446cf489fb99c91b3fc2bf96b1dc184f5ba
1/* 2 * Copyright (C) 2014 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 17package com.android.systemui.recents.views; 18 19import android.content.Context; 20import android.content.res.Resources; 21import android.graphics.Canvas; 22import android.graphics.Rect; 23import android.graphics.drawable.Drawable; 24import android.os.Handler; 25import android.util.ArraySet; 26import android.util.AttributeSet; 27import android.view.LayoutInflater; 28import android.view.MotionEvent; 29import android.view.View; 30import android.view.WindowInsets; 31import android.view.animation.AnimationUtils; 32import android.view.animation.Interpolator; 33import android.widget.FrameLayout; 34import com.android.systemui.R; 35import com.android.systemui.recents.Recents; 36import com.android.systemui.recents.RecentsActivity; 37import com.android.systemui.recents.RecentsActivityLaunchState; 38import com.android.systemui.recents.RecentsAppWidgetHostView; 39import com.android.systemui.recents.RecentsConfiguration; 40import com.android.systemui.recents.RecentsDebugFlags; 41import com.android.systemui.recents.events.EventBus; 42import com.android.systemui.recents.events.activity.CancelEnterRecentsWindowAnimationEvent; 43import com.android.systemui.recents.events.activity.DebugFlagsChangedEvent; 44import com.android.systemui.recents.events.activity.DismissRecentsToHomeAnimationStarted; 45import com.android.systemui.recents.events.activity.HideHistoryButtonEvent; 46import com.android.systemui.recents.events.activity.HideHistoryEvent; 47import com.android.systemui.recents.events.activity.ShowHistoryButtonEvent; 48import com.android.systemui.recents.events.activity.ShowHistoryEvent; 49import com.android.systemui.recents.events.component.RecentsVisibilityChangedEvent; 50import com.android.systemui.recents.events.ui.DraggingInRecentsEndedEvent; 51import com.android.systemui.recents.events.ui.DraggingInRecentsEvent; 52import com.android.systemui.recents.events.ui.dragndrop.DragDropTargetChangedEvent; 53import com.android.systemui.recents.events.ui.dragndrop.DragEndEvent; 54import com.android.systemui.recents.events.ui.dragndrop.DragStartEvent; 55import com.android.systemui.recents.misc.SystemServicesProxy; 56import com.android.systemui.recents.model.Task; 57import com.android.systemui.recents.model.TaskStack; 58 59import java.util.ArrayList; 60import java.util.List; 61 62import static android.app.ActivityManager.StackId.INVALID_STACK_ID; 63 64/** 65 * This view is the the top level layout that contains TaskStacks (which are laid out according 66 * to their SpaceNode bounds. 67 */ 68public class RecentsView extends FrameLayout implements TaskStackView.TaskStackViewCallbacks { 69 70 private static final String TAG = "RecentsView"; 71 private static final boolean DEBUG = false; 72 73 Handler mHandler; 74 75 TaskStack mStack; 76 TaskStackView mTaskStackView; 77 RecentsAppWidgetHostView mSearchBar; 78 View mHistoryButton; 79 boolean mAwaitingFirstLayout = true; 80 boolean mLastTaskLaunchedWasFreeform; 81 82 RecentsTransitionHelper mTransitionHelper; 83 RecentsViewTouchHandler mTouchHandler; 84 TaskStack.DockState[] mVisibleDockStates = { 85 TaskStack.DockState.LEFT, 86 TaskStack.DockState.TOP, 87 TaskStack.DockState.RIGHT, 88 TaskStack.DockState.BOTTOM, 89 }; 90 91 private Interpolator mFastOutSlowInInterpolator; 92 private Interpolator mFastOutLinearInInterpolator; 93 private int mHistoryTransitionDuration; 94 95 Rect mSystemInsets = new Rect(); 96 97 public RecentsView(Context context) { 98 super(context); 99 } 100 101 public RecentsView(Context context, AttributeSet attrs) { 102 this(context, attrs, 0); 103 } 104 105 public RecentsView(Context context, AttributeSet attrs, int defStyleAttr) { 106 this(context, attrs, defStyleAttr, 0); 107 } 108 109 public RecentsView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { 110 super(context, attrs, defStyleAttr, defStyleRes); 111 Resources res = context.getResources(); 112 setWillNotDraw(false); 113 mHandler = new Handler(); 114 mTransitionHelper = new RecentsTransitionHelper(getContext(), mHandler); 115 mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context, 116 com.android.internal.R.interpolator.fast_out_slow_in); 117 mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(context, 118 com.android.internal.R.interpolator.fast_out_linear_in); 119 mHistoryTransitionDuration = res.getInteger(R.integer.recents_history_transition_duration); 120 mTouchHandler = new RecentsViewTouchHandler(this); 121 122 LayoutInflater inflater = LayoutInflater.from(context); 123 mHistoryButton = inflater.inflate(R.layout.recents_history_button, this, false); 124 mHistoryButton.setOnClickListener(new View.OnClickListener() { 125 @Override 126 public void onClick(View v) { 127 EventBus.getDefault().send(new ShowHistoryEvent()); 128 } 129 }); 130 } 131 132 /** Set/get the bsp root node */ 133 public void setTaskStack(TaskStack stack) { 134 RecentsConfiguration config = Recents.getConfiguration(); 135 mStack = stack; 136 if (config.getLaunchState().launchedReuseTaskStackViews) { 137 if (mTaskStackView != null) { 138 // If onRecentsHidden is not triggered, we need to the stack view again here 139 mTaskStackView.reset(); 140 mTaskStackView.setStack(stack); 141 } else { 142 mTaskStackView = new TaskStackView(getContext(), stack); 143 mTaskStackView.setCallbacks(this); 144 addView(mTaskStackView); 145 } 146 } else { 147 if (mTaskStackView != null) { 148 removeView(mTaskStackView); 149 } 150 mTaskStackView = new TaskStackView(getContext(), stack); 151 mTaskStackView.setCallbacks(this); 152 addView(mTaskStackView); 153 } 154 if (indexOfChild(mHistoryButton) == -1) { 155 addView(mHistoryButton); 156 } else { 157 mHistoryButton.bringToFront(); 158 } 159 160 // Trigger a new layout 161 requestLayout(); 162 } 163 164 /** 165 * Returns whether the last task launched was in the freeform stack or not. 166 */ 167 public boolean isLastTaskLaunchedFreeform() { 168 return mLastTaskLaunchedWasFreeform; 169 } 170 171 /** 172 * Returns the currently set task stack. 173 */ 174 public TaskStack getTaskStack() { 175 return mStack; 176 } 177 178 /** Gets the next task in the stack - or if the last - the top task */ 179 public Task getNextTaskOrTopTask(Task taskToSearch) { 180 Task returnTask = null; 181 boolean found = false; 182 if (mTaskStackView != null) { 183 TaskStack stack = mTaskStackView.getStack(); 184 ArrayList<Task> taskList = stack.getStackTasks(); 185 // Iterate the stack views and try and find the focused task 186 for (int j = taskList.size() - 1; j >= 0; --j) { 187 Task task = taskList.get(j); 188 // Return the next task in the line. 189 if (found) 190 return task; 191 // Remember the first possible task as the top task. 192 if (returnTask == null) 193 returnTask = task; 194 if (task == taskToSearch) 195 found = true; 196 } 197 } 198 return returnTask; 199 } 200 201 /** Launches the focused task from the first stack if possible */ 202 public boolean launchFocusedTask() { 203 if (mTaskStackView != null) { 204 TaskStack stack = mTaskStackView.getStack(); 205 Task task = mTaskStackView.getFocusedTask(); 206 if (task != null) { 207 TaskView taskView = mTaskStackView.getChildViewForTask(task); 208 onTaskViewClicked(mTaskStackView, taskView, stack, task, false, null, 209 INVALID_STACK_ID); 210 return true; 211 } 212 } 213 return false; 214 } 215 216 /** Launches a given task. */ 217 public boolean launchTask(Task task, Rect taskBounds, int destinationStack) { 218 if (mTaskStackView != null) { 219 TaskStack stack = mTaskStackView.getStack(); 220 // Iterate the stack views and try and find the given task. 221 List<TaskView> taskViews = mTaskStackView.getTaskViews(); 222 int taskViewCount = taskViews.size(); 223 for (int j = 0; j < taskViewCount; j++) { 224 TaskView tv = taskViews.get(j); 225 if (tv.getTask() == task) { 226 onTaskViewClicked(mTaskStackView, tv, stack, task, false, 227 taskBounds, destinationStack); 228 return true; 229 } 230 } 231 } 232 return false; 233 } 234 235 /** Requests all task stacks to start their enter-recents animation */ 236 public void startEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx) { 237 // We have to increment/decrement the post animation trigger in case there are no children 238 // to ensure that it runs 239 ctx.postAnimationTrigger.increment(); 240 if (mTaskStackView != null) { 241 mTaskStackView.startEnterRecentsAnimation(ctx); 242 } 243 ctx.postAnimationTrigger.decrement(); 244 } 245 246 /** Requests all task stacks to start their exit-recents animation */ 247 public void startExitToHomeAnimation(ViewAnimation.TaskViewExitContext ctx) { 248 // We have to increment/decrement the post animation trigger in case there are no children 249 // to ensure that it runs 250 ctx.postAnimationTrigger.increment(); 251 if (mTaskStackView != null) { 252 mTaskStackView.startExitToHomeAnimation(ctx); 253 } 254 ctx.postAnimationTrigger.decrement(); 255 256 // Hide the history button 257 int taskViewExitToHomeDuration = getResources().getInteger( 258 R.integer.recents_task_exit_to_home_duration); 259 hideHistoryButton(taskViewExitToHomeDuration); 260 261 // If we are going home, cancel the previous task's window transition 262 EventBus.getDefault().send(new CancelEnterRecentsWindowAnimationEvent(null)); 263 264 // Notify sof the exit animation 265 EventBus.getDefault().send(new DismissRecentsToHomeAnimationStarted()); 266 } 267 268 /** Adds the search bar */ 269 public void setSearchBar(RecentsAppWidgetHostView searchBar) { 270 // Remove the previous search bar if one exists 271 if (mSearchBar != null && indexOfChild(mSearchBar) > -1) { 272 removeView(mSearchBar); 273 } 274 // Add the new search bar 275 if (searchBar != null) { 276 mSearchBar = searchBar; 277 addView(mSearchBar); 278 } 279 } 280 281 /** Returns whether there is currently a search bar */ 282 public boolean hasValidSearchBar() { 283 return mSearchBar != null && !mSearchBar.isReinflateRequired(); 284 } 285 286 /** Sets the visibility of the search bar */ 287 public void setSearchBarVisibility(int visibility) { 288 if (mSearchBar != null) { 289 mSearchBar.setVisibility(visibility); 290 // Always bring the search bar to the top 291 mSearchBar.bringToFront(); 292 } 293 } 294 295 /** 296 * Returns the last known system insets. 297 */ 298 public Rect getSystemInsets() { 299 return mSystemInsets; 300 } 301 302 @Override 303 protected void onAttachedToWindow() { 304 EventBus.getDefault().register(this, RecentsActivity.EVENT_BUS_PRIORITY + 1); 305 EventBus.getDefault().register(mTouchHandler, RecentsActivity.EVENT_BUS_PRIORITY + 1); 306 super.onAttachedToWindow(); 307 } 308 309 @Override 310 protected void onDetachedFromWindow() { 311 super.onDetachedFromWindow(); 312 EventBus.getDefault().unregister(this); 313 EventBus.getDefault().unregister(mTouchHandler); 314 } 315 316 /** 317 * This is called with the full size of the window since we are handling our own insets. 318 */ 319 @Override 320 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 321 RecentsConfiguration config = Recents.getConfiguration(); 322 int width = MeasureSpec.getSize(widthMeasureSpec); 323 int height = MeasureSpec.getSize(heightMeasureSpec); 324 325 // Get the search bar bounds and measure the search bar layout 326 Rect searchBarSpaceBounds = new Rect(); 327 if (mSearchBar != null) { 328 config.getSearchBarBounds(new Rect(0, 0, width, height), mSystemInsets.top, 329 searchBarSpaceBounds); 330 mSearchBar.measure( 331 MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.width(), MeasureSpec.EXACTLY), 332 MeasureSpec.makeMeasureSpec(searchBarSpaceBounds.height(), MeasureSpec.EXACTLY)); 333 } 334 335 Rect taskStackBounds = new Rect(); 336 config.getTaskStackBounds(new Rect(0, 0, width, height), mSystemInsets.top, 337 mSystemInsets.right, searchBarSpaceBounds, taskStackBounds); 338 if (mTaskStackView != null && mTaskStackView.getVisibility() != GONE) { 339 mTaskStackView.setTaskStackBounds(taskStackBounds, mSystemInsets); 340 mTaskStackView.measure(widthMeasureSpec, heightMeasureSpec); 341 } 342 343 // Measure the history button with the full space above the stack, but width-constrained 344 // to the stack 345 Rect historyButtonRect = mTaskStackView.mLayoutAlgorithm.mHistoryButtonRect; 346 measureChild(mHistoryButton, 347 MeasureSpec.makeMeasureSpec(historyButtonRect.width(), MeasureSpec.EXACTLY), 348 MeasureSpec.makeMeasureSpec(historyButtonRect.height(), 349 MeasureSpec.EXACTLY)); 350 setMeasuredDimension(width, height); 351 } 352 353 /** 354 * This is called with the full size of the window since we are handling our own insets. 355 */ 356 @Override 357 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 358 RecentsConfiguration config = Recents.getConfiguration(); 359 360 // Get the search bar bounds so that we lay it out 361 Rect measuredRect = new Rect(0, 0, getMeasuredWidth(), getMeasuredHeight()); 362 Rect searchBarSpaceBounds = new Rect(); 363 if (mSearchBar != null) { 364 config.getSearchBarBounds(measuredRect, 365 mSystemInsets.top, searchBarSpaceBounds); 366 mSearchBar.layout(searchBarSpaceBounds.left, searchBarSpaceBounds.top, 367 searchBarSpaceBounds.right, searchBarSpaceBounds.bottom); 368 } 369 370 if (mTaskStackView != null && mTaskStackView.getVisibility() != GONE) { 371 mTaskStackView.layout(left, top, left + getMeasuredWidth(), top + getMeasuredHeight()); 372 } 373 374 // Layout the history button left-aligned with the stack, but offset from the top of the 375 // view 376 Rect historyButtonRect = mTaskStackView.mLayoutAlgorithm.mHistoryButtonRect; 377 mHistoryButton.layout(historyButtonRect.left, historyButtonRect.top, 378 historyButtonRect.right, historyButtonRect.bottom); 379 380 if (mAwaitingFirstLayout) { 381 mAwaitingFirstLayout = false; 382 383 // If launched via dragging from the nav bar, then we should translate the whole view 384 // down offscreen 385 RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState(); 386 if (launchState.launchedViaDragGesture) { 387 setTranslationY(getMeasuredHeight()); 388 } 389 } 390 } 391 392 @Override 393 public WindowInsets onApplyWindowInsets(WindowInsets insets) { 394 mSystemInsets.set(insets.getSystemWindowInsets()); 395 requestLayout(); 396 return insets; 397 } 398 399 @Override 400 public boolean onInterceptTouchEvent(MotionEvent ev) { 401 return mTouchHandler.onInterceptTouchEvent(ev); 402 } 403 404 @Override 405 public boolean onTouchEvent(MotionEvent ev) { 406 return mTouchHandler.onTouchEvent(ev); 407 } 408 409 @Override 410 protected void dispatchDraw(Canvas canvas) { 411 super.dispatchDraw(canvas); 412 for (int i = mVisibleDockStates.length - 1; i >= 0; i--) { 413 Drawable d = mVisibleDockStates[i].viewState.dockAreaOverlay; 414 if (d.getAlpha() > 0) { 415 d.draw(canvas); 416 } 417 } 418 } 419 420 @Override 421 protected boolean verifyDrawable(Drawable who) { 422 for (int i = mVisibleDockStates.length - 1; i >= 0; i--) { 423 Drawable d = mVisibleDockStates[i].viewState.dockAreaOverlay; 424 if (d == who) { 425 return true; 426 } 427 } 428 return super.verifyDrawable(who); 429 } 430 431 public void disableLayersForOneFrame() { 432 if (mTaskStackView != null) { 433 mTaskStackView.disableLayersForOneFrame(); 434 } 435 } 436 437 /**** TaskStackView.TaskStackCallbacks Implementation ****/ 438 439 @Override 440 public void onTaskViewClicked(final TaskStackView stackView, final TaskView tv, 441 final TaskStack stack, final Task task, final boolean lockToTask, 442 final Rect bounds, int destinationStack) { 443 mLastTaskLaunchedWasFreeform = task.isFreeformTask(); 444 mTransitionHelper.launchTaskFromRecents(stack, task, stackView, tv, lockToTask, bounds, 445 destinationStack); 446 } 447 448 /**** EventBus Events ****/ 449 450 public final void onBusEvent(DragStartEvent event) { 451 updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(), 452 TaskStack.DockState.NONE.viewState.dockAreaAlpha); 453 } 454 455 public final void onBusEvent(DragDropTargetChangedEvent event) { 456 if (event.dropTarget == null || !(event.dropTarget instanceof TaskStack.DockState)) { 457 updateVisibleDockRegions(mTouchHandler.getDockStatesForCurrentOrientation(), 458 TaskStack.DockState.NONE.viewState.dockAreaAlpha); 459 } else { 460 final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget; 461 updateVisibleDockRegions(new TaskStack.DockState[] {dockState}, -1); 462 } 463 } 464 465 public final void onBusEvent(final DragEndEvent event) { 466 // Animate the overlay alpha back to 0 467 updateVisibleDockRegions(null, -1); 468 469 // Handle the case where we drop onto a dock region 470 if (event.dropTarget instanceof TaskStack.DockState) { 471 final TaskStack.DockState dockState = (TaskStack.DockState) event.dropTarget; 472 473 // Dock the task and launch it 474 SystemServicesProxy ssp = Recents.getSystemServices(); 475 ssp.startTaskInDockedMode(event.task.key.id, dockState.createMode); 476 launchTask(event.task, null, INVALID_STACK_ID); 477 } 478 } 479 480 public final void onBusEvent(DraggingInRecentsEvent event) { 481 if (mTaskStackView.getTaskViews().size() > 0) { 482 setTranslationY(event.distanceFromTop - mTaskStackView.getTaskViews().get(0).getY()); 483 } 484 } 485 486 public final void onBusEvent(DraggingInRecentsEndedEvent event) { 487 animate().translationY(0f); 488 } 489 490 public final void onBusEvent(ShowHistoryEvent event) { 491 // Hide the history button when the history view is shown 492 hideHistoryButton(mHistoryTransitionDuration); 493 } 494 495 public final void onBusEvent(HideHistoryEvent event) { 496 // Show the history button when the history view is hidden 497 showHistoryButton(mHistoryTransitionDuration); 498 } 499 500 public final void onBusEvent(ShowHistoryButtonEvent event) { 501 showHistoryButton(150); 502 } 503 504 public final void onBusEvent(HideHistoryButtonEvent event) { 505 hideHistoryButton(100); 506 } 507 508 public final void onBusEvent(DebugFlagsChangedEvent event) { 509 RecentsDebugFlags debugFlags = Recents.getDebugFlags(); 510 if (!debugFlags.isHistoryEnabled()) { 511 hideHistoryButton(100); 512 } 513 } 514 515 /** 516 * Shows the history button. 517 */ 518 private void showHistoryButton(int duration) { 519 RecentsDebugFlags debugFlags = Recents.getDebugFlags(); 520 if (!debugFlags.isHistoryEnabled()) { 521 return; 522 } 523 524 mHistoryButton.setVisibility(View.VISIBLE); 525 mHistoryButton.animate() 526 .alpha(1f) 527 .setDuration(duration) 528 .setInterpolator(mFastOutSlowInInterpolator) 529 .withLayer() 530 .start(); 531 } 532 533 /** 534 * Hides the history button. 535 */ 536 private void hideHistoryButton(int duration) { 537 mHistoryButton.animate() 538 .alpha(0f) 539 .setDuration(duration) 540 .setInterpolator(mFastOutLinearInInterpolator) 541 .withEndAction(new Runnable() { 542 @Override 543 public void run() { 544 mHistoryButton.setVisibility(View.INVISIBLE); 545 } 546 }) 547 .withLayer() 548 .start(); 549 } 550 551 /** 552 * Updates the dock region to match the specified dock state. 553 */ 554 private void updateVisibleDockRegions(TaskStack.DockState[] newDockStates, int overrideAlpha) { 555 ArraySet<TaskStack.DockState> newDockStatesSet = new ArraySet<>(); 556 if (newDockStates != null) { 557 for (TaskStack.DockState dockState : newDockStates) { 558 newDockStatesSet.add(dockState); 559 } 560 } 561 for (TaskStack.DockState dockState : mVisibleDockStates) { 562 TaskStack.DockState.ViewState viewState = dockState.viewState; 563 if (newDockStates == null || !newDockStatesSet.contains(dockState)) { 564 // This is no longer visible, so hide it 565 viewState.startAlphaAnimation(0, 150); 566 } else { 567 // This state is now visible, update the bounds and show it 568 int alpha = (overrideAlpha != -1 ? overrideAlpha : viewState.dockAreaAlpha); 569 viewState.dockAreaOverlay.setBounds( 570 dockState.getDockedBounds(getMeasuredWidth(), getMeasuredHeight())); 571 viewState.dockAreaOverlay.setCallback(this); 572 viewState.startAlphaAnimation(alpha, 150); 573 } 574 } 575 } 576 577 public final void onBusEvent(RecentsVisibilityChangedEvent event) { 578 if (!event.visible) { 579 // Reset the view state 580 mAwaitingFirstLayout = true; 581 mLastTaskLaunchedWasFreeform = false; 582 } 583 } 584} 585