1/*
2 * Copyright (C) 2012 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.statusbar.phone;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.ObjectAnimator;
22import android.animation.ValueAnimator;
23import android.content.Context;
24import android.content.res.Configuration;
25import android.content.res.Resources;
26import android.os.SystemClock;
27import android.util.AttributeSet;
28import android.util.Log;
29import android.view.InputDevice;
30import android.view.MotionEvent;
31import android.view.ViewConfiguration;
32import android.view.ViewTreeObserver;
33import android.view.animation.Interpolator;
34import android.widget.FrameLayout;
35
36import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
37import com.android.keyguard.LatencyTracker;
38import com.android.systemui.DejankUtils;
39import com.android.systemui.Interpolators;
40import com.android.systemui.R;
41import com.android.systemui.classifier.FalsingManager;
42import com.android.systemui.doze.DozeLog;
43import com.android.systemui.statusbar.FlingAnimationUtils;
44import com.android.systemui.statusbar.StatusBarState;
45import com.android.systemui.statusbar.policy.HeadsUpManager;
46
47import java.io.FileDescriptor;
48import java.io.PrintWriter;
49
50public abstract class PanelView extends FrameLayout {
51    public static final boolean DEBUG = PanelBar.DEBUG;
52    public static final String TAG = PanelView.class.getSimpleName();
53    private static final int INITIAL_OPENING_PEEK_DURATION = 200;
54    private static final int PEEK_ANIMATION_DURATION = 360;
55    private long mDownTime;
56    private float mMinExpandHeight;
57    private LockscreenGestureLogger mLockscreenGestureLogger = new LockscreenGestureLogger();
58    private boolean mPanelUpdateWhenAnimatorEnds;
59
60    private final void logf(String fmt, Object... args) {
61        Log.v(TAG, (mViewName != null ? (mViewName + ": ") : "") + String.format(fmt, args));
62    }
63
64    protected StatusBar mStatusBar;
65    protected HeadsUpManager mHeadsUpManager;
66
67    private float mPeekHeight;
68    private float mHintDistance;
69    private float mInitialOffsetOnTouch;
70    private boolean mCollapsedAndHeadsUpOnDown;
71    private float mExpandedFraction = 0;
72    protected float mExpandedHeight = 0;
73    private boolean mPanelClosedOnDown;
74    private boolean mHasLayoutedSinceDown;
75    private float mUpdateFlingVelocity;
76    private boolean mUpdateFlingOnLayout;
77    private boolean mPeekTouching;
78    private boolean mJustPeeked;
79    private boolean mClosing;
80    protected boolean mTracking;
81    private boolean mTouchSlopExceeded;
82    private int mTrackingPointer;
83    protected int mTouchSlop;
84    protected boolean mHintAnimationRunning;
85    private boolean mOverExpandedBeforeFling;
86    private boolean mTouchAboveFalsingThreshold;
87    private int mUnlockFalsingThreshold;
88    private boolean mTouchStartedInEmptyArea;
89    private boolean mMotionAborted;
90    private boolean mUpwardsWhenTresholdReached;
91    private boolean mAnimatingOnDown;
92
93    private ValueAnimator mHeightAnimator;
94    private ObjectAnimator mPeekAnimator;
95    private VelocityTrackerInterface mVelocityTracker;
96    private FlingAnimationUtils mFlingAnimationUtils;
97    private FlingAnimationUtils mFlingAnimationUtilsClosing;
98    private FlingAnimationUtils mFlingAnimationUtilsDismissing;
99    private FalsingManager mFalsingManager;
100
101    /**
102     * Whether an instant expand request is currently pending and we are just waiting for layout.
103     */
104    private boolean mInstantExpanding;
105    private boolean mAnimateAfterExpanding;
106
107    PanelBar mBar;
108
109    private String mViewName;
110    private float mInitialTouchY;
111    private float mInitialTouchX;
112    private boolean mTouchDisabled;
113
114    /**
115     * Whether or not the PanelView can be expanded or collapsed with a drag.
116     */
117    private boolean mNotificationsDragEnabled;
118
119    private Interpolator mBounceInterpolator;
120    protected KeyguardBottomAreaView mKeyguardBottomArea;
121
122    /**
123     * Speed-up factor to be used when {@link #mFlingCollapseRunnable} runs the next time.
124     */
125    private float mNextCollapseSpeedUpFactor = 1.0f;
126
127    protected boolean mExpanding;
128    private boolean mGestureWaitForTouchSlop;
129    private boolean mIgnoreXTouchSlop;
130    private boolean mExpandLatencyTracking;
131
132    protected void onExpandingFinished() {
133        mBar.onExpandingFinished();
134    }
135
136    protected void onExpandingStarted() {
137    }
138
139    private void notifyExpandingStarted() {
140        if (!mExpanding) {
141            mExpanding = true;
142            onExpandingStarted();
143        }
144    }
145
146    protected final void notifyExpandingFinished() {
147        endClosing();
148        if (mExpanding) {
149            mExpanding = false;
150            onExpandingFinished();
151        }
152    }
153
154    private void runPeekAnimation(long duration, float peekHeight, boolean collapseWhenFinished) {
155        mPeekHeight = peekHeight;
156        if (DEBUG) logf("peek to height=%.1f", mPeekHeight);
157        if (mHeightAnimator != null) {
158            return;
159        }
160        if (mPeekAnimator != null) {
161            mPeekAnimator.cancel();
162        }
163        mPeekAnimator = ObjectAnimator.ofFloat(this, "expandedHeight", mPeekHeight)
164                .setDuration(duration);
165        mPeekAnimator.setInterpolator(Interpolators.LINEAR_OUT_SLOW_IN);
166        mPeekAnimator.addListener(new AnimatorListenerAdapter() {
167            private boolean mCancelled;
168
169            @Override
170            public void onAnimationCancel(Animator animation) {
171                mCancelled = true;
172            }
173
174            @Override
175            public void onAnimationEnd(Animator animation) {
176                mPeekAnimator = null;
177                if (!mCancelled && collapseWhenFinished) {
178                    postOnAnimation(mPostCollapseRunnable);
179                }
180
181            }
182        });
183        notifyExpandingStarted();
184        mPeekAnimator.start();
185        mJustPeeked = true;
186    }
187
188    public PanelView(Context context, AttributeSet attrs) {
189        super(context, attrs);
190        mFlingAnimationUtils = new FlingAnimationUtils(context, 0.6f /* maxLengthSeconds */,
191                0.6f /* speedUpFactor */);
192        mFlingAnimationUtilsClosing = new FlingAnimationUtils(context, 0.5f /* maxLengthSeconds */,
193                0.6f /* speedUpFactor */);
194        mFlingAnimationUtilsDismissing = new FlingAnimationUtils(context,
195                0.5f /* maxLengthSeconds */, 0.2f /* speedUpFactor */, 0.6f /* x2 */,
196                0.84f /* y2 */);
197        mBounceInterpolator = new BounceInterpolator();
198        mFalsingManager = FalsingManager.getInstance(context);
199        mNotificationsDragEnabled =
200                getResources().getBoolean(R.bool.config_enableNotificationShadeDrag);
201    }
202
203    protected void loadDimens() {
204        final Resources res = getContext().getResources();
205        final ViewConfiguration configuration = ViewConfiguration.get(getContext());
206        mTouchSlop = configuration.getScaledTouchSlop();
207        mHintDistance = res.getDimension(R.dimen.hint_move_distance);
208        mUnlockFalsingThreshold = res.getDimensionPixelSize(R.dimen.unlock_falsing_threshold);
209    }
210
211    private void trackMovement(MotionEvent event) {
212        // Add movement to velocity tracker using raw screen X and Y coordinates instead
213        // of window coordinates because the window frame may be moving at the same time.
214        float deltaX = event.getRawX() - event.getX();
215        float deltaY = event.getRawY() - event.getY();
216        event.offsetLocation(deltaX, deltaY);
217        if (mVelocityTracker != null) mVelocityTracker.addMovement(event);
218        event.offsetLocation(-deltaX, -deltaY);
219    }
220
221    public void setTouchDisabled(boolean disabled) {
222        mTouchDisabled = disabled;
223        if (mTouchDisabled) {
224            cancelHeightAnimator();
225            if (mTracking) {
226                onTrackingStopped(true /* expanded */);
227            }
228            notifyExpandingFinished();
229        }
230    }
231
232    public void startExpandLatencyTracking() {
233        if (LatencyTracker.isEnabled(mContext)) {
234            LatencyTracker.getInstance(mContext).onActionStart(
235                    LatencyTracker.ACTION_EXPAND_PANEL);
236            mExpandLatencyTracking = true;
237        }
238    }
239
240    @Override
241    public boolean onTouchEvent(MotionEvent event) {
242        if (mInstantExpanding || mTouchDisabled
243                || (mMotionAborted && event.getActionMasked() != MotionEvent.ACTION_DOWN)) {
244            return false;
245        }
246
247        // If dragging should not expand the notifications shade, then return false.
248        if (!mNotificationsDragEnabled) {
249            if (mTracking) {
250                // Turn off tracking if it's on or the shade can get stuck in the down position.
251                onTrackingStopped(true /* expand */);
252            }
253            return false;
254        }
255
256        // On expanding, single mouse click expands the panel instead of dragging.
257        if (isFullyCollapsed() && event.isFromSource(InputDevice.SOURCE_MOUSE)) {
258            if (event.getAction() == MotionEvent.ACTION_UP) {
259                expand(true);
260            }
261            return true;
262        }
263
264        /*
265         * We capture touch events here and update the expand height here in case according to
266         * the users fingers. This also handles multi-touch.
267         *
268         * If the user just clicks shortly, we show a quick peek of the shade.
269         *
270         * Flinging is also enabled in order to open or close the shade.
271         */
272
273        int pointerIndex = event.findPointerIndex(mTrackingPointer);
274        if (pointerIndex < 0) {
275            pointerIndex = 0;
276            mTrackingPointer = event.getPointerId(pointerIndex);
277        }
278        final float x = event.getX(pointerIndex);
279        final float y = event.getY(pointerIndex);
280
281        if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
282            mGestureWaitForTouchSlop = isFullyCollapsed() || hasConflictingGestures();
283            mIgnoreXTouchSlop = isFullyCollapsed() || shouldGestureIgnoreXTouchSlop(x, y);
284        }
285
286        switch (event.getActionMasked()) {
287            case MotionEvent.ACTION_DOWN:
288                startExpandMotion(x, y, false /* startTracking */, mExpandedHeight);
289                mJustPeeked = false;
290                mMinExpandHeight = 0.0f;
291                mPanelClosedOnDown = isFullyCollapsed();
292                mHasLayoutedSinceDown = false;
293                mUpdateFlingOnLayout = false;
294                mMotionAborted = false;
295                mPeekTouching = mPanelClosedOnDown;
296                mDownTime = SystemClock.uptimeMillis();
297                mTouchAboveFalsingThreshold = false;
298                mCollapsedAndHeadsUpOnDown = isFullyCollapsed()
299                        && mHeadsUpManager.hasPinnedHeadsUp();
300                if (mVelocityTracker == null) {
301                    initVelocityTracker();
302                }
303                trackMovement(event);
304                if (!mGestureWaitForTouchSlop || (mHeightAnimator != null && !mHintAnimationRunning)
305                        || mPeekAnimator != null) {
306                    mTouchSlopExceeded = (mHeightAnimator != null && !mHintAnimationRunning)
307                            || mPeekAnimator != null;
308                    cancelHeightAnimator();
309                    cancelPeek();
310                    onTrackingStarted();
311                }
312                if (isFullyCollapsed() && !mHeadsUpManager.hasPinnedHeadsUp()) {
313                    startOpening();
314                }
315                break;
316
317            case MotionEvent.ACTION_POINTER_UP:
318                final int upPointer = event.getPointerId(event.getActionIndex());
319                if (mTrackingPointer == upPointer) {
320                    // gesture is ongoing, find a new pointer to track
321                    final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1;
322                    final float newY = event.getY(newIndex);
323                    final float newX = event.getX(newIndex);
324                    mTrackingPointer = event.getPointerId(newIndex);
325                    startExpandMotion(newX, newY, true /* startTracking */, mExpandedHeight);
326                }
327                break;
328            case MotionEvent.ACTION_POINTER_DOWN:
329                if (mStatusBar.getBarState() == StatusBarState.KEYGUARD) {
330                    mMotionAborted = true;
331                    endMotionEvent(event, x, y, true /* forceCancel */);
332                    return false;
333                }
334                break;
335            case MotionEvent.ACTION_MOVE:
336                trackMovement(event);
337                float h = y - mInitialTouchY;
338
339                // If the panel was collapsed when touching, we only need to check for the
340                // y-component of the gesture, as we have no conflicting horizontal gesture.
341                if (Math.abs(h) > mTouchSlop
342                        && (Math.abs(h) > Math.abs(x - mInitialTouchX)
343                        || mIgnoreXTouchSlop)) {
344                    mTouchSlopExceeded = true;
345                    if (mGestureWaitForTouchSlop && !mTracking && !mCollapsedAndHeadsUpOnDown) {
346                        if (!mJustPeeked && mInitialOffsetOnTouch != 0f) {
347                            startExpandMotion(x, y, false /* startTracking */, mExpandedHeight);
348                            h = 0;
349                        }
350                        cancelHeightAnimator();
351                        onTrackingStarted();
352                    }
353                }
354                float newHeight = Math.max(0, h + mInitialOffsetOnTouch);
355                if (newHeight > mPeekHeight) {
356                    if (mPeekAnimator != null) {
357                        mPeekAnimator.cancel();
358                    }
359                    mJustPeeked = false;
360                } else if (mPeekAnimator == null && mJustPeeked) {
361                    // The initial peek has finished, but we haven't dragged as far yet, lets
362                    // speed it up by starting at the peek height.
363                    mInitialOffsetOnTouch = mExpandedHeight;
364                    mInitialTouchY = y;
365                    mMinExpandHeight = mExpandedHeight;
366                    mJustPeeked = false;
367                }
368                newHeight = Math.max(newHeight, mMinExpandHeight);
369                if (-h >= getFalsingThreshold()) {
370                    mTouchAboveFalsingThreshold = true;
371                    mUpwardsWhenTresholdReached = isDirectionUpwards(x, y);
372                }
373                if (!mJustPeeked && (!mGestureWaitForTouchSlop || mTracking) &&
374                        !isTrackingBlocked()) {
375                    setExpandedHeightInternal(newHeight);
376                }
377                break;
378
379            case MotionEvent.ACTION_UP:
380            case MotionEvent.ACTION_CANCEL:
381                trackMovement(event);
382                endMotionEvent(event, x, y, false /* forceCancel */);
383                break;
384        }
385        return !mGestureWaitForTouchSlop || mTracking;
386    }
387
388    private void startOpening() {;
389        runPeekAnimation(INITIAL_OPENING_PEEK_DURATION, getOpeningHeight(),
390                false /* collapseWhenFinished */);
391        notifyBarPanelExpansionChanged();
392    }
393
394    protected abstract float getOpeningHeight();
395
396    /**
397     * @return whether the swiping direction is upwards and above a 45 degree angle compared to the
398     * horizontal direction
399     */
400    private boolean isDirectionUpwards(float x, float y) {
401        float xDiff = x - mInitialTouchX;
402        float yDiff = y - mInitialTouchY;
403        if (yDiff >= 0) {
404            return false;
405        }
406        return Math.abs(yDiff) >= Math.abs(xDiff);
407    }
408
409    protected void startExpandingFromPeek() {
410        mStatusBar.handlePeekToExpandTransistion();
411    }
412
413    protected void startExpandMotion(float newX, float newY, boolean startTracking,
414            float expandedHeight) {
415        mInitialOffsetOnTouch = expandedHeight;
416        mInitialTouchY = newY;
417        mInitialTouchX = newX;
418        if (startTracking) {
419            mTouchSlopExceeded = true;
420            setExpandedHeight(mInitialOffsetOnTouch);
421            onTrackingStarted();
422        }
423    }
424
425    private void endMotionEvent(MotionEvent event, float x, float y, boolean forceCancel) {
426        mTrackingPointer = -1;
427        if ((mTracking && mTouchSlopExceeded)
428                || Math.abs(x - mInitialTouchX) > mTouchSlop
429                || Math.abs(y - mInitialTouchY) > mTouchSlop
430                || event.getActionMasked() == MotionEvent.ACTION_CANCEL
431                || forceCancel) {
432            float vel = 0f;
433            float vectorVel = 0f;
434            if (mVelocityTracker != null) {
435                mVelocityTracker.computeCurrentVelocity(1000);
436                vel = mVelocityTracker.getYVelocity();
437                vectorVel = (float) Math.hypot(
438                        mVelocityTracker.getXVelocity(), mVelocityTracker.getYVelocity());
439            }
440            boolean expand = flingExpands(vel, vectorVel, x, y)
441                    || event.getActionMasked() == MotionEvent.ACTION_CANCEL
442                    || forceCancel;
443            DozeLog.traceFling(expand, mTouchAboveFalsingThreshold,
444                    mStatusBar.isFalsingThresholdNeeded(),
445                    mStatusBar.isWakeUpComingFromTouch());
446                    // Log collapse gesture if on lock screen.
447                    if (!expand && mStatusBar.getBarState() == StatusBarState.KEYGUARD) {
448                        float displayDensity = mStatusBar.getDisplayDensity();
449                        int heightDp = (int) Math.abs((y - mInitialTouchY) / displayDensity);
450                        int velocityDp = (int) Math.abs(vel / displayDensity);
451                        mLockscreenGestureLogger.write(
452                                MetricsEvent.ACTION_LS_UNLOCK,
453                                heightDp, velocityDp);
454                    }
455            fling(vel, expand, isFalseTouch(x, y));
456            onTrackingStopped(expand);
457            mUpdateFlingOnLayout = expand && mPanelClosedOnDown && !mHasLayoutedSinceDown;
458            if (mUpdateFlingOnLayout) {
459                mUpdateFlingVelocity = vel;
460            }
461        } else if (mPanelClosedOnDown && !mHeadsUpManager.hasPinnedHeadsUp() && !mTracking) {
462            long timePassed = SystemClock.uptimeMillis() - mDownTime;
463            if (timePassed < ViewConfiguration.getLongPressTimeout()) {
464                // Lets show the user that he can actually expand the panel
465                runPeekAnimation(PEEK_ANIMATION_DURATION, getPeekHeight(), true /* collapseWhenFinished */);
466            } else {
467                // We need to collapse the panel since we peeked to the small height.
468                postOnAnimation(mPostCollapseRunnable);
469            }
470        } else {
471            boolean expands = onEmptySpaceClick(mInitialTouchX);
472            onTrackingStopped(expands);
473        }
474
475        if (mVelocityTracker != null) {
476            mVelocityTracker.recycle();
477            mVelocityTracker = null;
478        }
479        mPeekTouching = false;
480    }
481
482    protected float getCurrentExpandVelocity() {
483        if (mVelocityTracker == null) {
484            return 0;
485        }
486        mVelocityTracker.computeCurrentVelocity(1000);
487        return mVelocityTracker.getYVelocity();
488    }
489
490    private int getFalsingThreshold() {
491        float factor = mStatusBar.isWakeUpComingFromTouch() ? 1.5f : 1.0f;
492        return (int) (mUnlockFalsingThreshold * factor);
493    }
494
495    protected abstract boolean hasConflictingGestures();
496
497    protected abstract boolean shouldGestureIgnoreXTouchSlop(float x, float y);
498
499    protected void onTrackingStopped(boolean expand) {
500        mTracking = false;
501        mBar.onTrackingStopped(expand);
502        notifyBarPanelExpansionChanged();
503    }
504
505    protected void onTrackingStarted() {
506        endClosing();
507        mTracking = true;
508        mBar.onTrackingStarted();
509        notifyExpandingStarted();
510        notifyBarPanelExpansionChanged();
511    }
512
513    @Override
514    public boolean onInterceptTouchEvent(MotionEvent event) {
515        if (mInstantExpanding || !mNotificationsDragEnabled || mTouchDisabled
516                || (mMotionAborted && event.getActionMasked() != MotionEvent.ACTION_DOWN)) {
517            return false;
518        }
519
520        /*
521         * If the user drags anywhere inside the panel we intercept it if the movement is
522         * upwards. This allows closing the shade from anywhere inside the panel.
523         *
524         * We only do this if the current content is scrolled to the bottom,
525         * i.e isScrolledToBottom() is true and therefore there is no conflicting scrolling gesture
526         * possible.
527         */
528        int pointerIndex = event.findPointerIndex(mTrackingPointer);
529        if (pointerIndex < 0) {
530            pointerIndex = 0;
531            mTrackingPointer = event.getPointerId(pointerIndex);
532        }
533        final float x = event.getX(pointerIndex);
534        final float y = event.getY(pointerIndex);
535        boolean scrolledToBottom = isScrolledToBottom();
536
537        switch (event.getActionMasked()) {
538            case MotionEvent.ACTION_DOWN:
539                mStatusBar.userActivity();
540                mAnimatingOnDown = mHeightAnimator != null;
541                mMinExpandHeight = 0.0f;
542                mDownTime = SystemClock.uptimeMillis();
543                if (mAnimatingOnDown && mClosing && !mHintAnimationRunning
544                        || mPeekAnimator != null) {
545                    cancelHeightAnimator();
546                    cancelPeek();
547                    mTouchSlopExceeded = true;
548                    return true;
549                }
550                mInitialTouchY = y;
551                mInitialTouchX = x;
552                mTouchStartedInEmptyArea = !isInContentBounds(x, y);
553                mTouchSlopExceeded = false;
554                mJustPeeked = false;
555                mMotionAborted = false;
556                mPanelClosedOnDown = isFullyCollapsed();
557                mCollapsedAndHeadsUpOnDown = false;
558                mHasLayoutedSinceDown = false;
559                mUpdateFlingOnLayout = false;
560                mTouchAboveFalsingThreshold = false;
561                initVelocityTracker();
562                trackMovement(event);
563                break;
564            case MotionEvent.ACTION_POINTER_UP:
565                final int upPointer = event.getPointerId(event.getActionIndex());
566                if (mTrackingPointer == upPointer) {
567                    // gesture is ongoing, find a new pointer to track
568                    final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1;
569                    mTrackingPointer = event.getPointerId(newIndex);
570                    mInitialTouchX = event.getX(newIndex);
571                    mInitialTouchY = event.getY(newIndex);
572                }
573                break;
574            case MotionEvent.ACTION_POINTER_DOWN:
575                if (mStatusBar.getBarState() == StatusBarState.KEYGUARD) {
576                    mMotionAborted = true;
577                    if (mVelocityTracker != null) {
578                        mVelocityTracker.recycle();
579                        mVelocityTracker = null;
580                    }
581                }
582                break;
583            case MotionEvent.ACTION_MOVE:
584                final float h = y - mInitialTouchY;
585                trackMovement(event);
586                if (scrolledToBottom || mTouchStartedInEmptyArea || mAnimatingOnDown) {
587                    float hAbs = Math.abs(h);
588                    if ((h < -mTouchSlop || (mAnimatingOnDown && hAbs > mTouchSlop))
589                            && hAbs > Math.abs(x - mInitialTouchX)) {
590                        cancelHeightAnimator();
591                        startExpandMotion(x, y, true /* startTracking */, mExpandedHeight);
592                        return true;
593                    }
594                }
595                break;
596            case MotionEvent.ACTION_CANCEL:
597            case MotionEvent.ACTION_UP:
598                if (mVelocityTracker != null) {
599                    mVelocityTracker.recycle();
600                    mVelocityTracker = null;
601                }
602                break;
603        }
604        return false;
605    }
606
607    /**
608     * @return Whether a pair of coordinates are inside the visible view content bounds.
609     */
610    protected abstract boolean isInContentBounds(float x, float y);
611
612    protected void cancelHeightAnimator() {
613        if (mHeightAnimator != null) {
614            if (mHeightAnimator.isRunning()) {
615                mPanelUpdateWhenAnimatorEnds = false;
616            }
617            mHeightAnimator.cancel();
618        }
619        endClosing();
620    }
621
622    private void endClosing() {
623        if (mClosing) {
624            mClosing = false;
625            onClosingFinished();
626        }
627    }
628
629    private void initVelocityTracker() {
630        if (mVelocityTracker != null) {
631            mVelocityTracker.recycle();
632        }
633        mVelocityTracker = VelocityTrackerFactory.obtain(getContext());
634    }
635
636    protected boolean isScrolledToBottom() {
637        return true;
638    }
639
640    protected float getContentHeight() {
641        return mExpandedHeight;
642    }
643
644    @Override
645    protected void onFinishInflate() {
646        super.onFinishInflate();
647        loadDimens();
648    }
649
650    @Override
651    protected void onConfigurationChanged(Configuration newConfig) {
652        super.onConfigurationChanged(newConfig);
653        loadDimens();
654    }
655
656    /**
657     * @param vel the current vertical velocity of the motion
658     * @param vectorVel the length of the vectorial velocity
659     * @return whether a fling should expands the panel; contracts otherwise
660     */
661    protected boolean flingExpands(float vel, float vectorVel, float x, float y) {
662        if (isFalseTouch(x, y)) {
663            return true;
664        }
665        if (Math.abs(vectorVel) < mFlingAnimationUtils.getMinVelocityPxPerSecond()) {
666            return getExpandedFraction() > 0.5f;
667        } else {
668            return vel > 0;
669        }
670    }
671
672    /**
673     * @param x the final x-coordinate when the finger was lifted
674     * @param y the final y-coordinate when the finger was lifted
675     * @return whether this motion should be regarded as a false touch
676     */
677    private boolean isFalseTouch(float x, float y) {
678        if (!mStatusBar.isFalsingThresholdNeeded()) {
679            return false;
680        }
681        if (mFalsingManager.isClassiferEnabled()) {
682            return mFalsingManager.isFalseTouch();
683        }
684        if (!mTouchAboveFalsingThreshold) {
685            return true;
686        }
687        if (mUpwardsWhenTresholdReached) {
688            return false;
689        }
690        return !isDirectionUpwards(x, y);
691    }
692
693    protected void fling(float vel, boolean expand) {
694        fling(vel, expand, 1.0f /* collapseSpeedUpFactor */, false);
695    }
696
697    protected void fling(float vel, boolean expand, boolean expandBecauseOfFalsing) {
698        fling(vel, expand, 1.0f /* collapseSpeedUpFactor */, expandBecauseOfFalsing);
699    }
700
701    protected void fling(float vel, boolean expand, float collapseSpeedUpFactor,
702            boolean expandBecauseOfFalsing) {
703        cancelPeek();
704        float target = expand ? getMaxPanelHeight() : 0;
705        if (!expand) {
706            mClosing = true;
707        }
708        flingToHeight(vel, expand, target, collapseSpeedUpFactor, expandBecauseOfFalsing);
709    }
710
711    protected void flingToHeight(float vel, boolean expand, float target,
712            float collapseSpeedUpFactor, boolean expandBecauseOfFalsing) {
713        // Hack to make the expand transition look nice when clear all button is visible - we make
714        // the animation only to the last notification, and then jump to the maximum panel height so
715        // clear all just fades in and the decelerating motion is towards the last notification.
716        final boolean clearAllExpandHack = expand && fullyExpandedClearAllVisible()
717                && mExpandedHeight < getMaxPanelHeight() - getClearAllHeight()
718                && !isClearAllVisible();
719        if (clearAllExpandHack) {
720            target = getMaxPanelHeight() - getClearAllHeight();
721        }
722        if (target == mExpandedHeight || getOverExpansionAmount() > 0f && expand) {
723            notifyExpandingFinished();
724            return;
725        }
726        mOverExpandedBeforeFling = getOverExpansionAmount() > 0f;
727        ValueAnimator animator = createHeightAnimator(target);
728        if (expand) {
729            if (expandBecauseOfFalsing && vel < 0) {
730                vel = 0;
731            }
732            mFlingAnimationUtils.apply(animator, mExpandedHeight, target, vel, getHeight());
733            if (vel == 0) {
734                animator.setDuration(350);
735            }
736        } else {
737            if (shouldUseDismissingAnimation()) {
738                if (vel == 0) {
739                    animator.setInterpolator(Interpolators.PANEL_CLOSE_ACCELERATED);
740                    long duration = (long) (200 + mExpandedHeight / getHeight() * 100);
741                    animator.setDuration(duration);
742                } else {
743                    mFlingAnimationUtilsDismissing.apply(animator, mExpandedHeight, target, vel,
744                            getHeight());
745                }
746            } else {
747                mFlingAnimationUtilsClosing
748                        .apply(animator, mExpandedHeight, target, vel, getHeight());
749            }
750
751            // Make it shorter if we run a canned animation
752            if (vel == 0) {
753                animator.setDuration((long) (animator.getDuration() / collapseSpeedUpFactor));
754            }
755        }
756        animator.addListener(new AnimatorListenerAdapter() {
757            private boolean mCancelled;
758
759            @Override
760            public void onAnimationCancel(Animator animation) {
761                mCancelled = true;
762            }
763
764            @Override
765            public void onAnimationEnd(Animator animation) {
766                if (clearAllExpandHack && !mCancelled) {
767                    setExpandedHeightInternal(getMaxPanelHeight());
768                }
769                setAnimator(null);
770                if (!mCancelled) {
771                    notifyExpandingFinished();
772                }
773                notifyBarPanelExpansionChanged();
774            }
775        });
776        setAnimator(animator);
777        animator.start();
778    }
779
780    protected abstract boolean shouldUseDismissingAnimation();
781
782    @Override
783    protected void onAttachedToWindow() {
784        super.onAttachedToWindow();
785        mViewName = getResources().getResourceName(getId());
786    }
787
788    public String getName() {
789        return mViewName;
790    }
791
792    public void setExpandedHeight(float height) {
793        if (DEBUG) logf("setExpandedHeight(%.1f)", height);
794        setExpandedHeightInternal(height + getOverExpansionPixels());
795    }
796
797    @Override
798    protected void onLayout (boolean changed, int left, int top, int right, int bottom) {
799        super.onLayout(changed, left, top, right, bottom);
800        mStatusBar.onPanelLaidOut();
801        requestPanelHeightUpdate();
802        mHasLayoutedSinceDown = true;
803        if (mUpdateFlingOnLayout) {
804            abortAnimations();
805            fling(mUpdateFlingVelocity, true /* expands */);
806            mUpdateFlingOnLayout = false;
807        }
808    }
809
810    protected void requestPanelHeightUpdate() {
811        float currentMaxPanelHeight = getMaxPanelHeight();
812
813        if (isFullyCollapsed()) {
814            return;
815        }
816
817        if (currentMaxPanelHeight == mExpandedHeight) {
818            return;
819        }
820
821        if (mPeekAnimator != null || mPeekTouching) {
822            return;
823        }
824
825        if (mTracking && !isTrackingBlocked()) {
826            return;
827        }
828
829        if (mHeightAnimator != null) {
830            mPanelUpdateWhenAnimatorEnds = true;
831            return;
832        }
833
834        setExpandedHeight(currentMaxPanelHeight);
835    }
836
837    public void setExpandedHeightInternal(float h) {
838        if (mExpandLatencyTracking && h != 0f) {
839            DejankUtils.postAfterTraversal(() -> LatencyTracker.getInstance(mContext).onActionEnd(
840                    LatencyTracker.ACTION_EXPAND_PANEL));
841            mExpandLatencyTracking = false;
842        }
843        float fhWithoutOverExpansion = getMaxPanelHeight() - getOverExpansionAmount();
844        if (mHeightAnimator == null) {
845            float overExpansionPixels = Math.max(0, h - fhWithoutOverExpansion);
846            if (getOverExpansionPixels() != overExpansionPixels && mTracking) {
847                setOverExpansion(overExpansionPixels, true /* isPixels */);
848            }
849            mExpandedHeight = Math.min(h, fhWithoutOverExpansion) + getOverExpansionAmount();
850        } else {
851            mExpandedHeight = h;
852            if (mOverExpandedBeforeFling) {
853                setOverExpansion(Math.max(0, h - fhWithoutOverExpansion), false /* isPixels */);
854            }
855        }
856
857        // If we are closing the panel and we are almost there due to a slow decelerating
858        // interpolator, abort the animation.
859        if (mExpandedHeight < 1f && mExpandedHeight != 0f && mClosing) {
860            mExpandedHeight = 0f;
861            if (mHeightAnimator != null) {
862                mHeightAnimator.end();
863            }
864        }
865        mExpandedFraction = Math.min(1f,
866                fhWithoutOverExpansion == 0 ? 0 : mExpandedHeight / fhWithoutOverExpansion);
867        onHeightUpdated(mExpandedHeight);
868        notifyBarPanelExpansionChanged();
869    }
870
871    /**
872     * @return true if the panel tracking should be temporarily blocked; this is used when a
873     *         conflicting gesture (opening QS) is happening
874     */
875    protected abstract boolean isTrackingBlocked();
876
877    protected abstract void setOverExpansion(float overExpansion, boolean isPixels);
878
879    protected abstract void onHeightUpdated(float expandedHeight);
880
881    protected abstract float getOverExpansionAmount();
882
883    protected abstract float getOverExpansionPixels();
884
885    /**
886     * This returns the maximum height of the panel. Children should override this if their
887     * desired height is not the full height.
888     *
889     * @return the default implementation simply returns the maximum height.
890     */
891    protected abstract int getMaxPanelHeight();
892
893    public void setExpandedFraction(float frac) {
894        setExpandedHeight(getMaxPanelHeight() * frac);
895    }
896
897    public float getExpandedHeight() {
898        return mExpandedHeight;
899    }
900
901    public float getExpandedFraction() {
902        return mExpandedFraction;
903    }
904
905    public boolean isFullyExpanded() {
906        return mExpandedHeight >= getMaxPanelHeight();
907    }
908
909    public boolean isFullyCollapsed() {
910        return mExpandedFraction <= 0.0f;
911    }
912
913    public boolean isCollapsing() {
914        return mClosing;
915    }
916
917    public boolean isTracking() {
918        return mTracking;
919    }
920
921    public void setBar(PanelBar panelBar) {
922        mBar = panelBar;
923    }
924
925    public void collapse(boolean delayed, float speedUpFactor) {
926        if (DEBUG) logf("collapse: " + this);
927        if (canPanelBeCollapsed()) {
928            cancelHeightAnimator();
929            notifyExpandingStarted();
930
931            // Set after notifyExpandingStarted, as notifyExpandingStarted resets the closing state.
932            mClosing = true;
933            if (delayed) {
934                mNextCollapseSpeedUpFactor = speedUpFactor;
935                postDelayed(mFlingCollapseRunnable, 120);
936            } else {
937                fling(0, false /* expand */, speedUpFactor, false /* expandBecauseOfFalsing */);
938            }
939        }
940    }
941
942    public boolean canPanelBeCollapsed() {
943        return !isFullyCollapsed() && !mTracking && !mClosing;
944    }
945
946    private final Runnable mFlingCollapseRunnable = new Runnable() {
947        @Override
948        public void run() {
949            fling(0, false /* expand */, mNextCollapseSpeedUpFactor,
950                    false /* expandBecauseOfFalsing */);
951        }
952    };
953
954    public void cancelPeek() {
955        boolean cancelled = false;
956        if (mPeekAnimator != null) {
957            cancelled = true;
958            mPeekAnimator.cancel();
959        }
960
961        if (cancelled) {
962            // When peeking, we already tell mBar that we expanded ourselves. Make sure that we also
963            // notify mBar that we might have closed ourselves.
964            notifyBarPanelExpansionChanged();
965        }
966    }
967
968    public void expand(final boolean animate) {
969        if (!isFullyCollapsed() && !isCollapsing()) {
970            return;
971        }
972
973        mInstantExpanding = true;
974        mAnimateAfterExpanding = animate;
975        mUpdateFlingOnLayout = false;
976        abortAnimations();
977        cancelPeek();
978        if (mTracking) {
979            onTrackingStopped(true /* expands */); // The panel is expanded after this call.
980        }
981        if (mExpanding) {
982            notifyExpandingFinished();
983        }
984        notifyBarPanelExpansionChanged();
985
986        // Wait for window manager to pickup the change, so we know the maximum height of the panel
987        // then.
988        getViewTreeObserver().addOnGlobalLayoutListener(
989                new ViewTreeObserver.OnGlobalLayoutListener() {
990                    @Override
991                    public void onGlobalLayout() {
992                        if (!mInstantExpanding) {
993                            getViewTreeObserver().removeOnGlobalLayoutListener(this);
994                            return;
995                        }
996                        if (mStatusBar.getStatusBarWindow().getHeight()
997                                != mStatusBar.getStatusBarHeight()) {
998                            getViewTreeObserver().removeOnGlobalLayoutListener(this);
999                            if (mAnimateAfterExpanding) {
1000                                notifyExpandingStarted();
1001                                fling(0, true /* expand */);
1002                            } else {
1003                                setExpandedFraction(1f);
1004                            }
1005                            mInstantExpanding = false;
1006                        }
1007                    }
1008                });
1009
1010        // Make sure a layout really happens.
1011        requestLayout();
1012    }
1013
1014    public void instantCollapse() {
1015        abortAnimations();
1016        setExpandedFraction(0f);
1017        if (mExpanding) {
1018            notifyExpandingFinished();
1019        }
1020        if (mInstantExpanding) {
1021            mInstantExpanding = false;
1022            notifyBarPanelExpansionChanged();
1023        }
1024    }
1025
1026    private void abortAnimations() {
1027        cancelPeek();
1028        cancelHeightAnimator();
1029        removeCallbacks(mPostCollapseRunnable);
1030        removeCallbacks(mFlingCollapseRunnable);
1031    }
1032
1033    protected void onClosingFinished() {
1034        mBar.onClosingFinished();
1035    }
1036
1037
1038    protected void startUnlockHintAnimation() {
1039
1040        // We don't need to hint the user if an animation is already running or the user is changing
1041        // the expansion.
1042        if (mHeightAnimator != null || mTracking) {
1043            return;
1044        }
1045        cancelPeek();
1046        notifyExpandingStarted();
1047        startUnlockHintAnimationPhase1(new Runnable() {
1048            @Override
1049            public void run() {
1050                notifyExpandingFinished();
1051                onUnlockHintFinished();
1052                mHintAnimationRunning = false;
1053            }
1054        });
1055        onUnlockHintStarted();
1056        mHintAnimationRunning = true;
1057    }
1058
1059    protected void onUnlockHintFinished() {
1060        mStatusBar.onHintFinished();
1061    }
1062
1063    protected void onUnlockHintStarted() {
1064        mStatusBar.onUnlockHintStarted();
1065    }
1066
1067    /**
1068     * Phase 1: Move everything upwards.
1069     */
1070    private void startUnlockHintAnimationPhase1(final Runnable onAnimationFinished) {
1071        float target = Math.max(0, getMaxPanelHeight() - mHintDistance);
1072        ValueAnimator animator = createHeightAnimator(target);
1073        animator.setDuration(250);
1074        animator.setInterpolator(Interpolators.FAST_OUT_SLOW_IN);
1075        animator.addListener(new AnimatorListenerAdapter() {
1076            private boolean mCancelled;
1077
1078            @Override
1079            public void onAnimationCancel(Animator animation) {
1080                mCancelled = true;
1081            }
1082
1083            @Override
1084            public void onAnimationEnd(Animator animation) {
1085                if (mCancelled) {
1086                    setAnimator(null);
1087                    onAnimationFinished.run();
1088                } else {
1089                    startUnlockHintAnimationPhase2(onAnimationFinished);
1090                }
1091            }
1092        });
1093        animator.start();
1094        setAnimator(animator);
1095        mKeyguardBottomArea.getIndicationArea().animate()
1096                .translationY(-mHintDistance)
1097                .setDuration(250)
1098                .setInterpolator(Interpolators.FAST_OUT_SLOW_IN)
1099                .withEndAction(new Runnable() {
1100                    @Override
1101                    public void run() {
1102                        mKeyguardBottomArea.getIndicationArea().animate()
1103                                .translationY(0)
1104                                .setDuration(450)
1105                                .setInterpolator(mBounceInterpolator)
1106                                .start();
1107                    }
1108                })
1109                .start();
1110    }
1111
1112    private void setAnimator(ValueAnimator animator) {
1113        mHeightAnimator = animator;
1114        if (animator == null && mPanelUpdateWhenAnimatorEnds) {
1115            mPanelUpdateWhenAnimatorEnds = false;
1116            requestPanelHeightUpdate();
1117        }
1118    }
1119
1120    /**
1121     * Phase 2: Bounce down.
1122     */
1123    private void startUnlockHintAnimationPhase2(final Runnable onAnimationFinished) {
1124        ValueAnimator animator = createHeightAnimator(getMaxPanelHeight());
1125        animator.setDuration(450);
1126        animator.setInterpolator(mBounceInterpolator);
1127        animator.addListener(new AnimatorListenerAdapter() {
1128            @Override
1129            public void onAnimationEnd(Animator animation) {
1130                setAnimator(null);
1131                onAnimationFinished.run();
1132                notifyBarPanelExpansionChanged();
1133            }
1134        });
1135        animator.start();
1136        setAnimator(animator);
1137    }
1138
1139    private ValueAnimator createHeightAnimator(float targetHeight) {
1140        ValueAnimator animator = ValueAnimator.ofFloat(mExpandedHeight, targetHeight);
1141        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
1142            @Override
1143            public void onAnimationUpdate(ValueAnimator animation) {
1144                setExpandedHeightInternal((Float) animation.getAnimatedValue());
1145            }
1146        });
1147        return animator;
1148    }
1149
1150    protected void notifyBarPanelExpansionChanged() {
1151        mBar.panelExpansionChanged(mExpandedFraction, mExpandedFraction > 0f
1152                || mPeekAnimator != null || mInstantExpanding || isPanelVisibleBecauseOfHeadsUp()
1153                || mTracking || mHeightAnimator != null);
1154    }
1155
1156    protected abstract boolean isPanelVisibleBecauseOfHeadsUp();
1157
1158    /**
1159     * Gets called when the user performs a click anywhere in the empty area of the panel.
1160     *
1161     * @return whether the panel will be expanded after the action performed by this method
1162     */
1163    protected boolean onEmptySpaceClick(float x) {
1164        if (mHintAnimationRunning) {
1165            return true;
1166        }
1167        return onMiddleClicked();
1168    }
1169
1170    protected final Runnable mPostCollapseRunnable = new Runnable() {
1171        @Override
1172        public void run() {
1173            collapse(false /* delayed */, 1.0f /* speedUpFactor */);
1174        }
1175    };
1176
1177    protected abstract boolean onMiddleClicked();
1178
1179    protected abstract boolean isDozing();
1180
1181    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
1182        pw.println(String.format("[PanelView(%s): expandedHeight=%f maxPanelHeight=%d closing=%s"
1183                + " tracking=%s justPeeked=%s peekAnim=%s%s timeAnim=%s%s touchDisabled=%s"
1184                + "]",
1185                this.getClass().getSimpleName(),
1186                getExpandedHeight(),
1187                getMaxPanelHeight(),
1188                mClosing?"T":"f",
1189                mTracking?"T":"f",
1190                mJustPeeked?"T":"f",
1191                mPeekAnimator, ((mPeekAnimator!=null && mPeekAnimator.isStarted())?" (started)":""),
1192                mHeightAnimator, ((mHeightAnimator !=null && mHeightAnimator.isStarted())?" (started)":""),
1193                mTouchDisabled?"T":"f"
1194        ));
1195    }
1196
1197    public abstract void resetViews();
1198
1199    protected abstract float getPeekHeight();
1200    /**
1201     * @return whether "Clear all" button will be visible when the panel is fully expanded
1202     */
1203    protected abstract boolean fullyExpandedClearAllVisible();
1204
1205    protected abstract boolean isClearAllVisible();
1206
1207    /**
1208     * @return the height of the clear all button, in pixels
1209     */
1210    protected abstract int getClearAllHeight();
1211
1212    public void setHeadsUpManager(HeadsUpManager headsUpManager) {
1213        mHeadsUpManager = headsUpManager;
1214    }
1215}
1216