TaskStackView.java revision 60a729c8e93461c9446d0c8cd519b40dec01e8d8
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.ComponentName; 20import android.content.Context; 21import android.graphics.Rect; 22import android.view.LayoutInflater; 23import android.view.MotionEvent; 24import android.view.View; 25import android.widget.FrameLayout; 26import com.android.systemui.R; 27import com.android.systemui.recents.Constants; 28import com.android.systemui.recents.RecentsConfiguration; 29import com.android.systemui.recents.misc.DozeTrigger; 30import com.android.systemui.recents.model.RecentsPackageMonitor; 31import com.android.systemui.recents.model.RecentsTaskLoader; 32import com.android.systemui.recents.model.Task; 33import com.android.systemui.recents.model.TaskStack; 34 35import java.util.ArrayList; 36import java.util.HashMap; 37import java.util.HashSet; 38 39 40/* The visual representation of a task stack view */ 41public class TaskStackView extends FrameLayout implements TaskStack.TaskStackCallbacks, 42 TaskView.TaskViewCallbacks, TaskStackViewScroller.TaskStackViewScrollerCallbacks, 43 ViewPool.ViewPoolConsumer<TaskView, Task>, RecentsPackageMonitor.PackageCallbacks { 44 45 /** The TaskView callbacks */ 46 interface TaskStackViewCallbacks { 47 public void onTaskViewClicked(TaskStackView stackView, TaskView tv, TaskStack stack, Task t, 48 boolean lockToTask); 49 public void onTaskViewAppInfoClicked(Task t); 50 public void onTaskViewDismissed(Task t); 51 public void onAllTaskViewsDismissed(); 52 public void onTaskStackFilterTriggered(); 53 public void onTaskStackUnfilterTriggered(); 54 } 55 56 RecentsConfiguration mConfig; 57 58 TaskStack mStack; 59 TaskStackViewLayoutAlgorithm mLayoutAlgorithm; 60 TaskStackViewFilterAlgorithm mFilterAlgorithm; 61 TaskStackViewScroller mStackScroller; 62 TaskStackViewTouchHandler mTouchHandler; 63 TaskStackViewCallbacks mCb; 64 ViewPool<TaskView, Task> mViewPool; 65 ArrayList<TaskViewTransform> mCurrentTaskTransforms = new ArrayList<TaskViewTransform>(); 66 DozeTrigger mUIDozeTrigger; 67 DebugOverlayView mDebugOverlay; 68 Rect mTaskStackBounds = new Rect(); 69 int mFocusedTaskIndex = -1; 70 71 // Optimizations 72 int mStackViewsAnimationDuration; 73 boolean mStackViewsDirty = true; 74 boolean mAwaitingFirstLayout = true; 75 boolean mStartEnterAnimationRequestedAfterLayout; 76 boolean mStartEnterAnimationCompleted; 77 ViewAnimation.TaskViewEnterContext mStartEnterAnimationContext; 78 int[] mTmpVisibleRange = new int[2]; 79 TaskViewTransform mTmpTransform = new TaskViewTransform(); 80 HashMap<Task, TaskView> mTmpTaskViewMap = new HashMap<Task, TaskView>(); 81 LayoutInflater mInflater; 82 83 // A convenience runnable to return all views to the pool 84 Runnable mReturnAllViewsToPoolRunnable = new Runnable() { 85 @Override 86 public void run() { 87 int childCount = getChildCount(); 88 for (int i = childCount - 1; i >= 0; i--) { 89 TaskView tv = (TaskView) getChildAt(i); 90 mViewPool.returnViewToPool(tv); 91 // Also hide the view since we don't need it anymore 92 tv.setVisibility(View.INVISIBLE); 93 } 94 } 95 }; 96 97 public TaskStackView(Context context, TaskStack stack) { 98 super(context); 99 mConfig = RecentsConfiguration.getInstance(); 100 mStack = stack; 101 mStack.setCallbacks(this); 102 mViewPool = new ViewPool<TaskView, Task>(context, this); 103 mInflater = LayoutInflater.from(context); 104 mLayoutAlgorithm = new TaskStackViewLayoutAlgorithm(mConfig); 105 mFilterAlgorithm = new TaskStackViewFilterAlgorithm(mConfig, this, mViewPool); 106 mStackScroller = new TaskStackViewScroller(context, mConfig, mLayoutAlgorithm); 107 mStackScroller.setCallbacks(this); 108 mTouchHandler = new TaskStackViewTouchHandler(context, this, mStackScroller); 109 mUIDozeTrigger = new DozeTrigger(mConfig.taskBarDismissDozeDelaySeconds, new Runnable() { 110 @Override 111 public void run() { 112 // Show the task bar dismiss buttons 113 int childCount = getChildCount(); 114 for (int i = 0; i < childCount; i++) { 115 TaskView tv = (TaskView) getChildAt(i); 116 tv.startNoUserInteractionAnimation(); 117 } 118 } 119 }); 120 } 121 122 /** Sets the callbacks */ 123 void setCallbacks(TaskStackViewCallbacks cb) { 124 mCb = cb; 125 } 126 127 /** Sets the debug overlay */ 128 public void setDebugOverlay(DebugOverlayView overlay) { 129 mDebugOverlay = overlay; 130 } 131 132 /** Requests that the views be synchronized with the model */ 133 void requestSynchronizeStackViewsWithModel() { 134 requestSynchronizeStackViewsWithModel(0); 135 } 136 void requestSynchronizeStackViewsWithModel(int duration) { 137 if (!mStackViewsDirty) { 138 invalidate(); 139 mStackViewsDirty = true; 140 } 141 if (mAwaitingFirstLayout) { 142 // Skip the animation if we are awaiting first layout 143 mStackViewsAnimationDuration = 0; 144 } else { 145 mStackViewsAnimationDuration = Math.max(mStackViewsAnimationDuration, duration); 146 } 147 } 148 149 /** Finds the child view given a specific task. */ 150 public TaskView getChildViewForTask(Task t) { 151 int childCount = getChildCount(); 152 for (int i = 0; i < childCount; i++) { 153 TaskView tv = (TaskView) getChildAt(i); 154 if (tv.getTask() == t) { 155 return tv; 156 } 157 } 158 return null; 159 } 160 161 /** Returns the stack algorithm for this task stack. */ 162 public TaskStackViewLayoutAlgorithm getStackAlgorithm() { 163 return mLayoutAlgorithm; 164 } 165 166 /** 167 * Gets the stack transforms of a list of tasks, and returns the visible range of tasks. 168 */ 169 private boolean updateStackTransforms(ArrayList<TaskViewTransform> taskTransforms, 170 ArrayList<Task> tasks, 171 float stackScroll, 172 int[] visibleRangeOut, 173 boolean boundTranslationsToRect) { 174 // XXX: We should be intelligent about where to look for the visible stack range using the 175 // current stack scroll. 176 // XXX: We should log extra cases like the ones below where we don't expect to hit very often 177 // XXX: Print out approximately how many indices we have to go through to find the first visible transform 178 179 int taskTransformCount = taskTransforms.size(); 180 int taskCount = tasks.size(); 181 int frontMostVisibleIndex = -1; 182 int backMostVisibleIndex = -1; 183 184 // We can reuse the task transforms where possible to reduce object allocation 185 if (taskTransformCount < taskCount) { 186 // If there are less transforms than tasks, then add as many transforms as necessary 187 for (int i = taskTransformCount; i < taskCount; i++) { 188 taskTransforms.add(new TaskViewTransform()); 189 } 190 } else if (taskTransformCount > taskCount) { 191 // If there are more transforms than tasks, then just subset the transform list 192 taskTransforms.subList(0, taskCount); 193 } 194 195 // Update the stack transforms 196 TaskViewTransform prevTransform = null; 197 for (int i = taskCount - 1; i >= 0; i--) { 198 TaskViewTransform transform = mLayoutAlgorithm.getStackTransform(tasks.get(i), 199 stackScroll, taskTransforms.get(i), prevTransform); 200 if (transform.visible) { 201 if (frontMostVisibleIndex < 0) { 202 frontMostVisibleIndex = i; 203 } 204 backMostVisibleIndex = i; 205 } else { 206 if (backMostVisibleIndex != -1) { 207 // We've reached the end of the visible range, so going down the rest of the 208 // stack, we can just reset the transforms accordingly 209 while (i >= 0) { 210 taskTransforms.get(i).reset(); 211 i--; 212 } 213 break; 214 } 215 } 216 217 if (boundTranslationsToRect) { 218 transform.translationY = Math.min(transform.translationY, 219 mLayoutAlgorithm.mViewRect.bottom); 220 } 221 prevTransform = transform; 222 } 223 if (visibleRangeOut != null) { 224 visibleRangeOut[0] = frontMostVisibleIndex; 225 visibleRangeOut[1] = backMostVisibleIndex; 226 } 227 return frontMostVisibleIndex != -1 && backMostVisibleIndex != -1; 228 } 229 230 /** 231 * Gets the stack transforms of a list of tasks, and returns the visible range of tasks. This 232 * call is less optimal than calling updateStackTransforms directly. 233 */ 234 private ArrayList<TaskViewTransform> getStackTransforms(ArrayList<Task> tasks, 235 float stackScroll, 236 int[] visibleRangeOut, 237 boolean boundTranslationsToRect) { 238 ArrayList<TaskViewTransform> taskTransforms = new ArrayList<TaskViewTransform>(); 239 updateStackTransforms(taskTransforms, tasks, stackScroll, visibleRangeOut, 240 boundTranslationsToRect); 241 return taskTransforms; 242 } 243 244 /** Synchronizes the views with the model */ 245 boolean synchronizeStackViewsWithModel() { 246 if (mStackViewsDirty) { 247 // Get all the task transforms 248 ArrayList<Task> tasks = mStack.getTasks(); 249 float stackScroll = mStackScroller.getStackScroll(); 250 int[] visibleRange = mTmpVisibleRange; 251 boolean isValidVisibleRange = updateStackTransforms(mCurrentTaskTransforms, tasks, 252 stackScroll, visibleRange, false); 253 if (mDebugOverlay != null) { 254 mDebugOverlay.setText("vis[" + visibleRange[1] + "-" + visibleRange[0] + "]"); 255 } 256 257 // Return all the invisible children to the pool 258 mTmpTaskViewMap.clear(); 259 int childCount = getChildCount(); 260 for (int i = childCount - 1; i >= 0; i--) { 261 TaskView tv = (TaskView) getChildAt(i); 262 Task task = tv.getTask(); 263 int taskIndex = mStack.indexOfTask(task); 264 if (visibleRange[1] <= taskIndex && taskIndex <= visibleRange[0]) { 265 mTmpTaskViewMap.put(task, tv); 266 } else { 267 mViewPool.returnViewToPool(tv); 268 } 269 } 270 271 // Pick up all the newly visible children and update all the existing children 272 for (int i = visibleRange[0]; isValidVisibleRange && i >= visibleRange[1]; i--) { 273 Task task = tasks.get(i); 274 TaskViewTransform transform = mCurrentTaskTransforms.get(i); 275 TaskView tv = mTmpTaskViewMap.get(task); 276 int taskIndex = mStack.indexOfTask(task); 277 278 if (tv == null) { 279 tv = mViewPool.pickUpViewFromPool(task, task); 280 281 if (mStackViewsAnimationDuration > 0) { 282 // For items in the list, put them in start animating them from the 283 // approriate ends of the list where they are expected to appear 284 if (Float.compare(transform.p, 0f) <= 0) { 285 mLayoutAlgorithm.getStackTransform(0f, 0f, mTmpTransform, null); 286 } else { 287 mLayoutAlgorithm.getStackTransform(1f, 0f, mTmpTransform, null); 288 } 289 tv.updateViewPropertiesToTaskTransform(mTmpTransform, 0); 290 } 291 } 292 293 // Animate the task into place 294 tv.updateViewPropertiesToTaskTransform(mCurrentTaskTransforms.get(taskIndex), 295 mStackViewsAnimationDuration); 296 } 297 298 // Reset the request-synchronize params 299 mStackViewsAnimationDuration = 0; 300 mStackViewsDirty = false; 301 return true; 302 } 303 return false; 304 } 305 306 /** Updates the clip for each of the task views. */ 307 void clipTaskViews() { 308 // Update the clip on each task child 309 if (Constants.DebugFlags.App.EnableTaskStackClipping) { 310 int childCount = getChildCount(); 311 for (int i = 0; i < childCount - 1; i++) { 312 TaskView tv = (TaskView) getChildAt(i); 313 TaskView nextTv = null; 314 TaskView tmpTv = null; 315 int clipBottom = 0; 316 if (tv.shouldClipViewInStack()) { 317 // Find the next view to clip against 318 int nextIndex = i; 319 while (nextIndex < getChildCount()) { 320 tmpTv = (TaskView) getChildAt(++nextIndex); 321 if (tmpTv != null && tmpTv.shouldClipViewInStack()) { 322 nextTv = tmpTv; 323 break; 324 } 325 } 326 327 // Clip against the next view, this is just an approximation since we are 328 // stacked and we can make assumptions about the visibility of the this 329 // task relative to the ones in front of it. 330 if (nextTv != null) { 331 // We can reuse the current task transforms to find the task rects 332 TaskViewTransform transform = mCurrentTaskTransforms.get(mStack.indexOfTask(tv.getTask())); 333 TaskViewTransform nextTransform = mCurrentTaskTransforms.get(mStack.indexOfTask(nextTv.getTask())); 334 clipBottom = transform.rect.bottom - nextTransform.rect.top; 335 } 336 } 337 tv.getViewBounds().setClipBottom(clipBottom); 338 } 339 if (getChildCount() > 0) { 340 // The front most task should never be clipped 341 TaskView tv = (TaskView) getChildAt(getChildCount() - 1); 342 tv.getViewBounds().setClipBottom(0); 343 } 344 } 345 } 346 347 /** The stack insets to apply to the stack contents */ 348 public void setStackInsetRect(Rect r) { 349 mTaskStackBounds.set(r); 350 } 351 352 /** Updates the min and max virtual scroll bounds */ 353 void updateMinMaxScroll(boolean boundScrollToNewMinMax, boolean launchedWithAltTab, 354 boolean launchedFromHome) { 355 // Compute the min and max scroll values 356 mLayoutAlgorithm.computeMinMaxScroll(mStack.getTasks(), launchedWithAltTab, launchedFromHome); 357 358 // Debug logging 359 if (boundScrollToNewMinMax) { 360 mStackScroller.boundScroll(); 361 } 362 } 363 364 /** Returns the scroller. */ 365 public TaskStackViewScroller getScroller() { 366 return mStackScroller; 367 } 368 369 /** Focuses the task at the specified index in the stack */ 370 void focusTask(int taskIndex, boolean scrollToNewPosition) { 371 // Return early if the task is already focused 372 if (taskIndex == mFocusedTaskIndex) return; 373 374 if (0 <= taskIndex && taskIndex < mStack.getTaskCount()) { 375 mFocusedTaskIndex = taskIndex; 376 377 // Focus the view if possible, otherwise, focus the view after we scroll into position 378 Task t = mStack.getTasks().get(taskIndex); 379 TaskView tv = getChildViewForTask(t); 380 Runnable postScrollRunnable = null; 381 if (tv != null) { 382 tv.setFocusedTask(); 383 } else { 384 postScrollRunnable = new Runnable() { 385 @Override 386 public void run() { 387 Task t = mStack.getTasks().get(mFocusedTaskIndex); 388 TaskView tv = getChildViewForTask(t); 389 if (tv != null) { 390 tv.setFocusedTask(); 391 } 392 } 393 }; 394 } 395 396 // Scroll the view into position (just center it in the curve) 397 if (scrollToNewPosition) { 398 float newScroll = mLayoutAlgorithm.getStackScrollForTaskIndex(t) - 0.5f; 399 newScroll = mStackScroller.getBoundedStackScroll(newScroll); 400 mStackScroller.animateScroll(mStackScroller.getStackScroll(), newScroll, postScrollRunnable); 401 } else { 402 if (postScrollRunnable != null) { 403 postScrollRunnable.run(); 404 } 405 } 406 407 } 408 } 409 410 /** Focuses the next task in the stack */ 411 void focusNextTask(boolean forward) { 412 // Find the next index to focus 413 int numTasks = mStack.getTaskCount(); 414 if (numTasks == 0) return; 415 416 int nextFocusIndex = numTasks - 1; 417 if (0 <= mFocusedTaskIndex && mFocusedTaskIndex < numTasks) { 418 nextFocusIndex = Math.max(0, Math.min(numTasks - 1, 419 mFocusedTaskIndex + (forward ? -1 : 1))); 420 } 421 focusTask(nextFocusIndex, true); 422 } 423 424 /** Dismisses the focused task. */ 425 public void dismissFocusedTask() { 426 // Return early if there is no focused task index 427 if (mFocusedTaskIndex < 0) return; 428 429 Task t = mStack.getTasks().get(mFocusedTaskIndex); 430 TaskView tv = getChildViewForTask(t); 431 tv.dismissTask(); 432 } 433 434 @Override 435 public boolean onInterceptTouchEvent(MotionEvent ev) { 436 return mTouchHandler.onInterceptTouchEvent(ev); 437 } 438 439 @Override 440 public boolean onTouchEvent(MotionEvent ev) { 441 return mTouchHandler.onTouchEvent(ev); 442 } 443 444 @Override 445 public void computeScroll() { 446 mStackScroller.computeScroll(); 447 // Synchronize the views 448 synchronizeStackViewsWithModel(); 449 clipTaskViews(); 450 } 451 452 /** Computes the stack and task rects */ 453 public void computeRects(int windowWidth, int windowHeight, Rect taskStackBounds, 454 boolean launchedWithAltTab, boolean launchedFromHome) { 455 // Compute the rects in the stack algorithm 456 mLayoutAlgorithm.computeRects(windowWidth, windowHeight, taskStackBounds); 457 458 // Update the scroll bounds 459 updateMinMaxScroll(false, launchedWithAltTab, launchedFromHome); 460 } 461 462 /** 463 * This is called with the full window width and height to allow stack view children to 464 * perform the full screen transition down. 465 */ 466 @Override 467 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 468 int width = MeasureSpec.getSize(widthMeasureSpec); 469 int height = MeasureSpec.getSize(heightMeasureSpec); 470 471 // Compute our stack/task rects 472 Rect taskStackBounds = new Rect(mTaskStackBounds); 473 taskStackBounds.bottom -= mConfig.systemInsets.bottom; 474 computeRects(width, height, taskStackBounds, mConfig.launchedWithAltTab, 475 mConfig.launchedFromHome); 476 477 // If this is the first layout, then scroll to the front of the stack and synchronize the 478 // stack views immediately to load all the views 479 if (mAwaitingFirstLayout) { 480 mStackScroller.setStackScrollToInitialState(); 481 requestSynchronizeStackViewsWithModel(); 482 synchronizeStackViewsWithModel(); 483 } 484 485 // Measure each of the TaskViews 486 int childCount = getChildCount(); 487 for (int i = 0; i < childCount; i++) { 488 TaskView tv = (TaskView) getChildAt(i); 489 if (tv.isFullScreenView()) { 490 tv.measure(widthMeasureSpec, heightMeasureSpec); 491 } else { 492 tv.measure( 493 MeasureSpec.makeMeasureSpec(mLayoutAlgorithm.mTaskRect.width(), 494 MeasureSpec.EXACTLY), 495 MeasureSpec.makeMeasureSpec(mLayoutAlgorithm.mTaskRect.height() + 496 tv.getMaxFooterHeight(), MeasureSpec.EXACTLY)); 497 } 498 } 499 500 setMeasuredDimension(width, height); 501 } 502 503 /** 504 * This is called with the size of the space not including the top or right insets, or the 505 * search bar height in portrait (but including the search bar width in landscape, since we want 506 * to draw under it. 507 */ 508 @Override 509 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 510 // Layout each of the children 511 int childCount = getChildCount(); 512 for (int i = 0; i < childCount; i++) { 513 TaskView tv = (TaskView) getChildAt(i); 514 if (tv.isFullScreenView()) { 515 tv.layout(left, top, left + tv.getMeasuredWidth(), top + tv.getMeasuredHeight()); 516 } else { 517 tv.layout(mLayoutAlgorithm.mTaskRect.left, mLayoutAlgorithm.mTaskRect.top, 518 mLayoutAlgorithm.mTaskRect.right, mLayoutAlgorithm.mTaskRect.bottom + 519 tv.getMaxFooterHeight()); 520 } 521 } 522 523 if (mAwaitingFirstLayout) { 524 mAwaitingFirstLayout = false; 525 onFirstLayout(); 526 } 527 } 528 529 /** Handler for the first layout. */ 530 void onFirstLayout() { 531 int offscreenY = mLayoutAlgorithm.mViewRect.bottom - 532 (mLayoutAlgorithm.mTaskRect.top - mLayoutAlgorithm.mViewRect.top); 533 534 // Find the launch target task 535 Task launchTargetTask = null; 536 int childCount = getChildCount(); 537 for (int i = childCount - 1; i >= 0; i--) { 538 TaskView tv = (TaskView) getChildAt(i); 539 Task task = tv.getTask(); 540 if (task.isLaunchTarget) { 541 launchTargetTask = task; 542 break; 543 } 544 } 545 546 // Prepare the first view for its enter animation 547 for (int i = childCount - 1; i >= 0; i--) { 548 TaskView tv = (TaskView) getChildAt(i); 549 Task task = tv.getTask(); 550 boolean occludesLaunchTarget = (launchTargetTask != null) && 551 launchTargetTask.group.isTaskAboveTask(task, launchTargetTask); 552 tv.prepareEnterRecentsAnimation(task.isLaunchTarget, occludesLaunchTarget, offscreenY); 553 } 554 555 // If the enter animation started already and we haven't completed a layout yet, do the 556 // enter animation now 557 if (mStartEnterAnimationRequestedAfterLayout) { 558 startEnterRecentsAnimation(mStartEnterAnimationContext); 559 mStartEnterAnimationRequestedAfterLayout = false; 560 mStartEnterAnimationContext = null; 561 } 562 563 // When Alt-Tabbing, we scroll to and focus the previous task 564 if (mConfig.launchedWithAltTab) { 565 if (mConfig.launchedFromHome) { 566 focusTask(Math.max(0, mStack.getTaskCount() - 1), false); 567 } else { 568 focusTask(Math.max(0, mStack.getTaskCount() - 2), false); 569 } 570 } 571 } 572 573 /** Requests this task stacks to start it's enter-recents animation */ 574 public void startEnterRecentsAnimation(ViewAnimation.TaskViewEnterContext ctx) { 575 // If we are still waiting to layout, then just defer until then 576 if (mAwaitingFirstLayout) { 577 mStartEnterAnimationRequestedAfterLayout = true; 578 mStartEnterAnimationContext = ctx; 579 return; 580 } 581 582 if (mStack.getTaskCount() > 0) { 583 // Find the launch target task 584 Task launchTargetTask = null; 585 int childCount = getChildCount(); 586 for (int i = childCount - 1; i >= 0; i--) { 587 TaskView tv = (TaskView) getChildAt(i); 588 Task task = tv.getTask(); 589 if (task.isLaunchTarget) { 590 launchTargetTask = task; 591 break; 592 } 593 } 594 595 // Animate all the task views into view 596 for (int i = childCount - 1; i >= 0; i--) { 597 TaskView tv = (TaskView) getChildAt(i); 598 Task task = tv.getTask(); 599 ctx.currentTaskTransform = new TaskViewTransform(); 600 ctx.currentStackViewIndex = i; 601 ctx.currentStackViewCount = childCount; 602 ctx.currentTaskRect = mLayoutAlgorithm.mTaskRect; 603 ctx.currentTaskOccludesLaunchTarget = (launchTargetTask != null) && 604 launchTargetTask.group.isTaskAboveTask(task, launchTargetTask); 605 mLayoutAlgorithm.getStackTransform(task, mStackScroller.getStackScroll(), ctx.currentTaskTransform, null); 606 tv.startEnterRecentsAnimation(ctx); 607 } 608 609 // Add a runnable to the post animation ref counter to clear all the views 610 ctx.postAnimationTrigger.addLastDecrementRunnable(new Runnable() { 611 @Override 612 public void run() { 613 mStartEnterAnimationCompleted = true; 614 // Start dozing 615 mUIDozeTrigger.startDozing(); 616 } 617 }); 618 } 619 } 620 621 /** Requests this task stacks to start it's exit-recents animation. */ 622 public void startExitToHomeAnimation(ViewAnimation.TaskViewExitContext ctx) { 623 // Stop any scrolling 624 mStackScroller.stopScroller(); 625 mStackScroller.stopBoundScrollAnimation(); 626 // Animate all the task views out of view 627 ctx.offscreenTranslationY = mLayoutAlgorithm.mViewRect.bottom - 628 (mLayoutAlgorithm.mTaskRect.top - mLayoutAlgorithm.mViewRect.top); 629 int childCount = getChildCount(); 630 for (int i = 0; i < childCount; i++) { 631 TaskView tv = (TaskView) getChildAt(i); 632 tv.startExitToHomeAnimation(ctx); 633 } 634 635 // Add a runnable to the post animation ref counter to clear all the views 636 ctx.postAnimationTrigger.addLastDecrementRunnable(mReturnAllViewsToPoolRunnable); 637 } 638 639 /** Animates a task view in this stack as it launches. */ 640 public void startLaunchTaskAnimation(TaskView tv, final Runnable r) { 641 Task launchTargetTask = tv.getTask(); 642 int childCount = getChildCount(); 643 for (int i = 0; i < childCount; i++) { 644 TaskView t = (TaskView) getChildAt(i); 645 if (t == tv) { 646 t.startLaunchTaskAnimation(r, true, true); 647 } else { 648 boolean occludesLaunchTarget = launchTargetTask.group.isTaskAboveTask(t.getTask(), 649 launchTargetTask); 650 t.startLaunchTaskAnimation(null, false, occludesLaunchTarget); 651 } 652 } 653 } 654 655 public boolean isTransformedTouchPointInView(float x, float y, View child) { 656 return isTransformedTouchPointInView(x, y, child, null); 657 } 658 659 /** Pokes the dozer on user interaction. */ 660 void onUserInteraction() { 661 // Poke the doze trigger if it is dozing 662 mUIDozeTrigger.poke(); 663 } 664 665 /**** TaskStackCallbacks Implementation ****/ 666 667 @Override 668 public void onStackTaskAdded(TaskStack stack, Task t) { 669 requestSynchronizeStackViewsWithModel(); 670 } 671 672 @Override 673 public void onStackTaskRemoved(TaskStack stack, Task removedTask, Task newFrontMostTask) { 674 // Remove the view associated with this task, we can't rely on updateTransforms 675 // to work here because the task is no longer in the list 676 TaskView tv = getChildViewForTask(removedTask); 677 if (tv != null) { 678 mViewPool.returnViewToPool(tv); 679 } 680 681 // Notify the callback that we've removed the task and it can clean up after it 682 mCb.onTaskViewDismissed(removedTask); 683 684 // Update the min/max scroll and animate other task views into their new positions 685 updateMinMaxScroll(true, mConfig.launchedWithAltTab, mConfig.launchedFromHome); 686 requestSynchronizeStackViewsWithModel(200); 687 688 // Update the new front most task 689 if (newFrontMostTask != null) { 690 TaskView frontTv = getChildViewForTask(newFrontMostTask); 691 if (frontTv != null) { 692 frontTv.onTaskBound(newFrontMostTask); 693 } 694 } 695 696 // If there are no remaining tasks, then either unfilter the current stack, or just close 697 // the activity if there are no filtered stacks 698 if (mStack.getTaskCount() == 0) { 699 boolean shouldFinishActivity = true; 700 if (mStack.hasFilteredTasks()) { 701 mStack.unfilterTasks(); 702 shouldFinishActivity = (mStack.getTaskCount() == 0); 703 } 704 if (shouldFinishActivity) { 705 mCb.onAllTaskViewsDismissed(); 706 } 707 } 708 } 709 710 @Override 711 public void onStackFiltered(TaskStack newStack, final ArrayList<Task> curTasks, 712 Task filteredTask) { 713 /* 714 // Stash the scroll and filtered task for us to restore to when we unfilter 715 mStashedScroll = getStackScroll(); 716 717 // Calculate the current task transforms 718 ArrayList<TaskViewTransform> curTaskTransforms = 719 getStackTransforms(curTasks, getStackScroll(), null, true); 720 721 // Update the task offsets 722 mLayoutAlgorithm.updateTaskOffsets(mStack.getTasks()); 723 724 // Scroll the item to the top of the stack (sans-peek) rect so that we can see it better 725 updateMinMaxScroll(false); 726 float overlapHeight = mLayoutAlgorithm.getTaskOverlapHeight(); 727 setStackScrollRaw((int) (newStack.indexOfTask(filteredTask) * overlapHeight)); 728 boundScrollRaw(); 729 730 // Compute the transforms of the items in the new stack after setting the new scroll 731 final ArrayList<Task> tasks = mStack.getTasks(); 732 final ArrayList<TaskViewTransform> taskTransforms = 733 getStackTransforms(mStack.getTasks(), getStackScroll(), null, true); 734 735 // Animate 736 mFilterAlgorithm.startFilteringAnimation(curTasks, curTaskTransforms, tasks, taskTransforms); 737 738 // Notify any callbacks 739 mCb.onTaskStackFilterTriggered(); 740 */ 741 } 742 743 @Override 744 public void onStackUnfiltered(TaskStack newStack, final ArrayList<Task> curTasks) { 745 /* 746 // Calculate the current task transforms 747 final ArrayList<TaskViewTransform> curTaskTransforms = 748 getStackTransforms(curTasks, getStackScroll(), null, true); 749 750 // Update the task offsets 751 mLayoutAlgorithm.updateTaskOffsets(mStack.getTasks()); 752 753 // Restore the stashed scroll 754 updateMinMaxScroll(false); 755 setStackScrollRaw(mStashedScroll); 756 boundScrollRaw(); 757 758 // Compute the transforms of the items in the new stack after restoring the stashed scroll 759 final ArrayList<Task> tasks = mStack.getTasks(); 760 final ArrayList<TaskViewTransform> taskTransforms = 761 getStackTransforms(tasks, getStackScroll(), null, true); 762 763 // Animate 764 mFilterAlgorithm.startFilteringAnimation(curTasks, curTaskTransforms, tasks, taskTransforms); 765 766 // Clear the saved vars 767 mStashedScroll = 0; 768 769 // Notify any callbacks 770 mCb.onTaskStackUnfilterTriggered(); 771 */ 772 } 773 774 /**** ViewPoolConsumer Implementation ****/ 775 776 @Override 777 public TaskView createView(Context context) { 778 return (TaskView) mInflater.inflate(R.layout.recents_task_view, this, false); 779 } 780 781 @Override 782 public void prepareViewToEnterPool(TaskView tv) { 783 Task task = tv.getTask(); 784 785 // Report that this tasks's data is no longer being used 786 RecentsTaskLoader.getInstance().unloadTaskData(task); 787 788 // Detach the view from the hierarchy 789 detachViewFromParent(tv); 790 791 // Reset the view properties 792 tv.resetViewProperties(); 793 } 794 795 @Override 796 public void prepareViewToLeavePool(TaskView tv, Task task, boolean isNewView) { 797 // Rebind the task and request that this task's data be filled into the TaskView 798 tv.onTaskBound(task); 799 800 // Mark the launch task as fullscreen 801 if (Constants.DebugFlags.App.EnableScreenshotAppTransition && mAwaitingFirstLayout) { 802 if (task.isLaunchTarget) { 803 tv.setIsFullScreen(true); 804 } 805 } 806 807 // Load the task data 808 RecentsTaskLoader.getInstance().loadTaskData(task); 809 810 // Sanity check, the task view should always be clipping against the stack at this point, 811 // but just in case, re-enable it here 812 tv.setClipViewInStack(true); 813 814 // If the doze trigger has already fired, then update the state for this task view 815 if (mUIDozeTrigger.hasTriggered()) { 816 tv.setNoUserInteractionState(); 817 } 818 819 // If we've finished the start animation, then ensure we always enable the focus animations 820 if (mStartEnterAnimationCompleted) { 821 tv.enableFocusAnimations(); 822 } 823 824 // Find the index where this task should be placed in the stack 825 int insertIndex = -1; 826 int taskIndex = mStack.indexOfTask(task); 827 if (taskIndex != -1) { 828 int childCount = getChildCount(); 829 for (int i = 0; i < childCount; i++) { 830 Task tvTask = ((TaskView) getChildAt(i)).getTask(); 831 if (taskIndex < mStack.indexOfTask(tvTask)) { 832 insertIndex = i; 833 break; 834 } 835 } 836 } 837 838 // Add/attach the view to the hierarchy 839 if (isNewView) { 840 addView(tv, insertIndex); 841 842 // Set the callbacks and listeners for this new view 843 tv.setTouchEnabled(true); 844 tv.setCallbacks(this); 845 } else { 846 attachViewToParent(tv, insertIndex, tv.getLayoutParams()); 847 } 848 } 849 850 @Override 851 public boolean hasPreferredData(TaskView tv, Task preferredData) { 852 return (tv.getTask() == preferredData); 853 } 854 855 /**** TaskViewCallbacks Implementation ****/ 856 857 @Override 858 public void onTaskViewAppIconClicked(TaskView tv) { 859 if (Constants.DebugFlags.App.EnableTaskFiltering) { 860 if (mStack.hasFilteredTasks()) { 861 mStack.unfilterTasks(); 862 } else { 863 mStack.filterTasks(tv.getTask()); 864 } 865 } 866 } 867 868 @Override 869 public void onTaskViewAppInfoClicked(TaskView tv) { 870 if (mCb != null) { 871 mCb.onTaskViewAppInfoClicked(tv.getTask()); 872 } 873 } 874 875 @Override 876 public void onTaskViewClicked(TaskView tv, Task task, boolean lockToTask) { 877 // Cancel any doze triggers 878 mUIDozeTrigger.stopDozing(); 879 880 if (mCb != null) { 881 mCb.onTaskViewClicked(this, tv, mStack, task, lockToTask); 882 } 883 } 884 885 @Override 886 public void onTaskViewDismissed(TaskView tv) { 887 Task task = tv.getTask(); 888 int taskIndex = mStack.indexOfTask(task); 889 boolean taskWasFocused = tv.isFocusedTask(); 890 // Announce for accessibility 891 tv.announceForAccessibility(getContext().getString(R.string.accessibility_recents_item_dismissed, 892 tv.getTask().activityLabel)); 893 // Remove the task from the view 894 mStack.removeTask(task); 895 // If the dismissed task was focused, then we should focus the next task in front 896 if (taskWasFocused) { 897 ArrayList<Task> tasks = mStack.getTasks(); 898 int nextTaskIndex = Math.min(tasks.size() - 1, taskIndex); 899 if (nextTaskIndex >= 0) { 900 Task nextTask = tasks.get(nextTaskIndex); 901 TaskView nextTv = getChildViewForTask(nextTask); 902 nextTv.setFocusedTask(); 903 } 904 } 905 } 906 907 @Override 908 public void onTaskViewClipStateChanged(TaskView tv) { 909 invalidate(); 910 } 911 912 @Override 913 public void onTaskViewFullScreenTransitionCompleted() { 914 requestSynchronizeStackViewsWithModel(); 915 } 916 917 @Override 918 public void onTaskViewFocusChanged(TaskView tv, boolean focused) { 919 if (focused) { 920 mFocusedTaskIndex = mStack.indexOfTask(tv.getTask()); 921 } 922 } 923 924 /**** TaskStackViewScroller.TaskStackViewScrollerCallbacks ****/ 925 926 @Override 927 public void onScrollChanged(float p) { 928 mUIDozeTrigger.poke(); 929 requestSynchronizeStackViewsWithModel(); 930 postInvalidateOnAnimation(); 931 } 932 933 /**** RecentsPackageMonitor.PackageCallbacks Implementation ****/ 934 935 @Override 936 public void onComponentRemoved(HashSet<ComponentName> cns) { 937 // For other tasks, just remove them directly if they no longer exist 938 ArrayList<Task> tasks = mStack.getTasks(); 939 for (int i = tasks.size() - 1; i >= 0; i--) { 940 final Task t = tasks.get(i); 941 if (cns.contains(t.key.baseIntent.getComponent())) { 942 TaskView tv = getChildViewForTask(t); 943 if (tv != null) { 944 // For visible children, defer removing the task until after the animation 945 tv.startDeleteTaskAnimation(new Runnable() { 946 @Override 947 public void run() { 948 mStack.removeTask(t); 949 } 950 }); 951 } else { 952 // Otherwise, remove the task from the stack immediately 953 mStack.removeTask(t); 954 } 955 } 956 } 957 } 958} 959