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      1 /*
      2  * Copyright (C) 2011 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 
     17 package com.android.systemui.statusbar.policy;
     18 
     19 import android.content.Context;
     20 import android.content.res.Configuration;
     21 import android.graphics.Outline;
     22 import android.graphics.Rect;
     23 import android.util.AttributeSet;
     24 import android.util.Log;
     25 import android.view.MotionEvent;
     26 import android.view.View;
     27 import android.view.ViewConfiguration;
     28 import android.view.ViewGroup;
     29 import android.view.ViewOutlineProvider;
     30 import android.view.ViewTreeObserver;
     31 import android.view.accessibility.AccessibilityEvent;
     32 import android.widget.FrameLayout;
     33 
     34 import com.android.systemui.ExpandHelper;
     35 import com.android.systemui.Gefingerpoken;
     36 import com.android.systemui.R;
     37 import com.android.systemui.SwipeHelper;
     38 import com.android.systemui.statusbar.ExpandableView;
     39 import com.android.systemui.statusbar.NotificationData;
     40 import com.android.systemui.statusbar.phone.PhoneStatusBar;
     41 
     42 public class HeadsUpNotificationView extends FrameLayout implements SwipeHelper.Callback, ExpandHelper.Callback,
     43         ViewTreeObserver.OnComputeInternalInsetsListener {
     44     private static final String TAG = "HeadsUpNotificationView";
     45     private static final boolean DEBUG = false;
     46     private static final boolean SPEW = DEBUG;
     47 
     48     Rect mTmpRect = new Rect();
     49     int[] mTmpTwoArray = new int[2];
     50 
     51     private final int mTouchSensitivityDelay;
     52     private final float mMaxAlpha = 1f;
     53     private SwipeHelper mSwipeHelper;
     54     private EdgeSwipeHelper mEdgeSwipeHelper;
     55 
     56     private PhoneStatusBar mBar;
     57     private ExpandHelper mExpandHelper;
     58 
     59     private long mStartTouchTime;
     60     private ViewGroup mContentHolder;
     61 
     62     private NotificationData.Entry mHeadsUp;
     63 
     64     public HeadsUpNotificationView(Context context, AttributeSet attrs) {
     65         this(context, attrs, 0);
     66     }
     67 
     68     public HeadsUpNotificationView(Context context, AttributeSet attrs, int defStyle) {
     69         super(context, attrs, defStyle);
     70         mTouchSensitivityDelay = getResources().getInteger(R.integer.heads_up_sensitivity_delay);
     71         if (DEBUG) Log.v(TAG, "create() " + mTouchSensitivityDelay);
     72     }
     73 
     74     public void updateResources() {
     75         if (mContentHolder != null) {
     76             final LayoutParams lp = (LayoutParams) mContentHolder.getLayoutParams();
     77             lp.width = getResources().getDimensionPixelSize(R.dimen.notification_panel_width);
     78             lp.gravity = getResources().getInteger(R.integer.notification_panel_layout_gravity);
     79             mContentHolder.setLayoutParams(lp);
     80         }
     81     }
     82 
     83     public void setBar(PhoneStatusBar bar) {
     84         mBar = bar;
     85     }
     86 
     87     public ViewGroup getHolder() {
     88         return mContentHolder;
     89     }
     90 
     91     public boolean showNotification(NotificationData.Entry headsUp) {
     92         if (mHeadsUp != null && headsUp != null && !mHeadsUp.key.equals(headsUp.key)) {
     93             // bump any previous heads up back to the shade
     94             release();
     95         }
     96 
     97         mHeadsUp = headsUp;
     98         if (mContentHolder != null) {
     99             mContentHolder.removeAllViews();
    100         }
    101 
    102         if (mHeadsUp != null) {
    103             mHeadsUp.row.setSystemExpanded(true);
    104             mHeadsUp.row.setSensitive(false);
    105             mHeadsUp.row.setHideSensitive(
    106                     false, false /* animated */, 0 /* delay */, 0 /* duration */);
    107             if (mContentHolder == null) {
    108                 // too soon!
    109                 return false;
    110             }
    111             mContentHolder.setX(0);
    112             mContentHolder.setVisibility(View.VISIBLE);
    113             mContentHolder.setAlpha(mMaxAlpha);
    114             mContentHolder.addView(mHeadsUp.row);
    115             sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
    116 
    117             mSwipeHelper.snapChild(mContentHolder, 1f);
    118             mStartTouchTime = System.currentTimeMillis() + mTouchSensitivityDelay;
    119 
    120             mHeadsUp.setInterruption();
    121 
    122             // 2. Animate mHeadsUpNotificationView in
    123             mBar.scheduleHeadsUpOpen();
    124 
    125             // 3. Set alarm to age the notification off
    126             mBar.resetHeadsUpDecayTimer();
    127         }
    128         return true;
    129     }
    130 
    131     @Override
    132     protected void onVisibilityChanged(View changedView, int visibility) {
    133         super.onVisibilityChanged(changedView, visibility);
    134         if (changedView.getVisibility() == VISIBLE) {
    135             sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
    136         }
    137     }
    138 
    139     public boolean isShowing(String key) {
    140         return mHeadsUp != null && mHeadsUp.key.equals(key);
    141     }
    142 
    143     /** Discard the Heads Up notification. */
    144     public void clear() {
    145         mHeadsUp = null;
    146         mBar.scheduleHeadsUpClose();
    147     }
    148 
    149     /** Respond to dismissal of the Heads Up window. */
    150     public void dismiss() {
    151         if (mHeadsUp == null) return;
    152         if (mHeadsUp.notification.isClearable()) {
    153             mBar.onNotificationClear(mHeadsUp.notification);
    154         } else {
    155             release();
    156         }
    157         mHeadsUp = null;
    158         mBar.scheduleHeadsUpClose();
    159     }
    160 
    161     /** Push any current Heads Up notification down into the shade. */
    162     public void release() {
    163         if (mHeadsUp != null) {
    164             mBar.displayNotificationFromHeadsUp(mHeadsUp.notification);
    165         }
    166         mHeadsUp = null;
    167     }
    168 
    169     public void releaseAndClose() {
    170         release();
    171         mBar.scheduleHeadsUpClose();
    172     }
    173 
    174     public NotificationData.Entry getEntry() {
    175         return mHeadsUp;
    176     }
    177 
    178     public boolean isClearable() {
    179         return mHeadsUp == null || mHeadsUp.notification.isClearable();
    180     }
    181 
    182     // ViewGroup methods
    183 
    184     private static final ViewOutlineProvider CONTENT_HOLDER_OUTLINE_PROVIDER =
    185             new ViewOutlineProvider() {
    186         @Override
    187         public void getOutline(View view, Outline outline) {
    188             int outlineLeft = view.getPaddingLeft();
    189             int outlineTop = view.getPaddingTop();
    190 
    191             // Apply padding to shadow.
    192             outline.setRect(outlineLeft, outlineTop,
    193                     view.getWidth() - outlineLeft - view.getPaddingRight(),
    194                     view.getHeight() - outlineTop - view.getPaddingBottom());
    195         }
    196     };
    197 
    198     @Override
    199     public void onAttachedToWindow() {
    200         final ViewConfiguration viewConfiguration = ViewConfiguration.get(getContext());
    201         float touchSlop = viewConfiguration.getScaledTouchSlop();
    202         mSwipeHelper = new SwipeHelper(SwipeHelper.X, this, getContext());
    203         mSwipeHelper.setMaxSwipeProgress(mMaxAlpha);
    204         mEdgeSwipeHelper = new EdgeSwipeHelper(touchSlop);
    205 
    206         int minHeight = getResources().getDimensionPixelSize(R.dimen.notification_min_height);
    207         int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_max_height);
    208         mExpandHelper = new ExpandHelper(getContext(), this, minHeight, maxHeight);
    209 
    210         mContentHolder = (ViewGroup) findViewById(R.id.content_holder);
    211         mContentHolder.setOutlineProvider(CONTENT_HOLDER_OUTLINE_PROVIDER);
    212 
    213         if (mHeadsUp != null) {
    214             // whoops, we're on already!
    215             showNotification(mHeadsUp);
    216         }
    217 
    218         getViewTreeObserver().addOnComputeInternalInsetsListener(this);
    219     }
    220 
    221     @Override
    222     public boolean onInterceptTouchEvent(MotionEvent ev) {
    223         if (DEBUG) Log.v(TAG, "onInterceptTouchEvent()");
    224         if (System.currentTimeMillis() < mStartTouchTime) {
    225             return true;
    226         }
    227         return mEdgeSwipeHelper.onInterceptTouchEvent(ev)
    228                 || mSwipeHelper.onInterceptTouchEvent(ev)
    229                 || mExpandHelper.onInterceptTouchEvent(ev)
    230                 || super.onInterceptTouchEvent(ev);
    231     }
    232 
    233     // View methods
    234 
    235     @Override
    236     public void onDraw(android.graphics.Canvas c) {
    237         super.onDraw(c);
    238         if (DEBUG) {
    239             //Log.d(TAG, "onDraw: canvas height: " + c.getHeight() + "px; measured height: "
    240             //        + getMeasuredHeight() + "px");
    241             c.save();
    242             c.clipRect(6, 6, c.getWidth() - 6, getMeasuredHeight() - 6,
    243                     android.graphics.Region.Op.DIFFERENCE);
    244             c.drawColor(0xFFcc00cc);
    245             c.restore();
    246         }
    247     }
    248 
    249     @Override
    250     public boolean onTouchEvent(MotionEvent ev) {
    251         if (System.currentTimeMillis() < mStartTouchTime) {
    252             return false;
    253         }
    254         mBar.resetHeadsUpDecayTimer();
    255         return mEdgeSwipeHelper.onTouchEvent(ev)
    256                 || mSwipeHelper.onTouchEvent(ev)
    257                 || mExpandHelper.onTouchEvent(ev)
    258                 || super.onTouchEvent(ev);
    259     }
    260 
    261     @Override
    262     protected void onConfigurationChanged(Configuration newConfig) {
    263         super.onConfigurationChanged(newConfig);
    264         float densityScale = getResources().getDisplayMetrics().density;
    265         mSwipeHelper.setDensityScale(densityScale);
    266         float pagingTouchSlop = ViewConfiguration.get(getContext()).getScaledPagingTouchSlop();
    267         mSwipeHelper.setPagingTouchSlop(pagingTouchSlop);
    268     }
    269 
    270     // ExpandHelper.Callback methods
    271 
    272     @Override
    273     public ExpandableView getChildAtRawPosition(float x, float y) {
    274         return getChildAtPosition(x, y);
    275     }
    276 
    277     @Override
    278     public ExpandableView getChildAtPosition(float x, float y) {
    279         return mHeadsUp == null ? null : mHeadsUp.row;
    280     }
    281 
    282     @Override
    283     public boolean canChildBeExpanded(View v) {
    284         return mHeadsUp != null && mHeadsUp.row == v && mHeadsUp.row.isExpandable();
    285     }
    286 
    287     @Override
    288     public void setUserExpandedChild(View v, boolean userExpanded) {
    289         if (mHeadsUp != null && mHeadsUp.row == v) {
    290             mHeadsUp.row.setUserExpanded(userExpanded);
    291         }
    292     }
    293 
    294     @Override
    295     public void setUserLockedChild(View v, boolean userLocked) {
    296         if (mHeadsUp != null && mHeadsUp.row == v) {
    297             mHeadsUp.row.setUserLocked(userLocked);
    298         }
    299     }
    300 
    301     @Override
    302     public void expansionStateChanged(boolean isExpanding) {
    303 
    304     }
    305 
    306     // SwipeHelper.Callback methods
    307 
    308     @Override
    309     public boolean canChildBeDismissed(View v) {
    310         return true;
    311     }
    312 
    313     @Override
    314     public boolean isAntiFalsingNeeded() {
    315         return false;
    316     }
    317 
    318     @Override
    319     public float getFalsingThresholdFactor() {
    320         return 1.0f;
    321     }
    322 
    323     @Override
    324     public void onChildDismissed(View v) {
    325         Log.v(TAG, "User swiped heads up to dismiss");
    326         mBar.onHeadsUpDismissed();
    327     }
    328 
    329     @Override
    330     public void onBeginDrag(View v) {
    331     }
    332 
    333     @Override
    334     public void onDragCancelled(View v) {
    335         mContentHolder.setAlpha(mMaxAlpha); // sometimes this isn't quite reset
    336     }
    337 
    338     @Override
    339     public void onChildSnappedBack(View animView) {
    340     }
    341 
    342     @Override
    343     public boolean updateSwipeProgress(View animView, boolean dismissable, float swipeProgress) {
    344         getBackground().setAlpha((int) (255 * swipeProgress));
    345         return false;
    346     }
    347 
    348     @Override
    349     public View getChildAtPosition(MotionEvent ev) {
    350         return mContentHolder;
    351     }
    352 
    353     @Override
    354     public View getChildContentView(View v) {
    355         return mContentHolder;
    356     }
    357 
    358     @Override
    359     public void onComputeInternalInsets(ViewTreeObserver.InternalInsetsInfo info) {
    360         mContentHolder.getLocationOnScreen(mTmpTwoArray);
    361 
    362         info.setTouchableInsets(ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION);
    363         info.touchableRegion.set(mTmpTwoArray[0], mTmpTwoArray[1],
    364                 mTmpTwoArray[0] + mContentHolder.getWidth(),
    365                 mTmpTwoArray[1] + mContentHolder.getHeight());
    366     }
    367 
    368     public void escalate() {
    369         mBar.scheduleHeadsUpEscalation();
    370     }
    371 
    372     public String getKey() {
    373         return mHeadsUp == null ? null : mHeadsUp.notification.getKey();
    374     }
    375 
    376     private class EdgeSwipeHelper implements Gefingerpoken {
    377         private static final boolean DEBUG_EDGE_SWIPE = false;
    378         private final float mTouchSlop;
    379         private boolean mConsuming;
    380         private float mFirstY;
    381         private float mFirstX;
    382 
    383         public EdgeSwipeHelper(float touchSlop) {
    384             mTouchSlop = touchSlop;
    385         }
    386 
    387         @Override
    388         public boolean onInterceptTouchEvent(MotionEvent ev) {
    389             switch (ev.getActionMasked()) {
    390                 case MotionEvent.ACTION_DOWN:
    391                     if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action down " + ev.getY());
    392                     mFirstX = ev.getX();
    393                     mFirstY = ev.getY();
    394                     mConsuming = false;
    395                     break;
    396 
    397                 case MotionEvent.ACTION_MOVE:
    398                     if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action move " + ev.getY());
    399                     final float dY = ev.getY() - mFirstY;
    400                     final float daX = Math.abs(ev.getX() - mFirstX);
    401                     final float daY = Math.abs(dY);
    402                     if (!mConsuming && (4f * daX) < daY && daY > mTouchSlop) {
    403                         if (dY > 0) {
    404                             if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found an open");
    405                             mBar.animateExpandNotificationsPanel();
    406                         }
    407                         if (dY < 0) {
    408                             if (DEBUG_EDGE_SWIPE) Log.d(TAG, "found a close");
    409                             mBar.onHeadsUpDismissed();
    410                         }
    411                         mConsuming = true;
    412                     }
    413                     break;
    414 
    415                 case MotionEvent.ACTION_UP:
    416                 case MotionEvent.ACTION_CANCEL:
    417                     if (DEBUG_EDGE_SWIPE) Log.d(TAG, "action done" );
    418                     mConsuming = false;
    419                     break;
    420             }
    421             return mConsuming;
    422         }
    423 
    424         @Override
    425         public boolean onTouchEvent(MotionEvent ev) {
    426             return mConsuming;
    427         }
    428     }
    429 }
    430