Workspace.java revision 3a56edb0eaed7424dba1541908c6c351ae40ca58 
1/*
2 * Copyright (C) 2008 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.launcher3;
18
19import android.animation.Animator;
20import android.animation.AnimatorListenerAdapter;
21import android.animation.LayoutTransition;
22import android.animation.ObjectAnimator;
23import android.animation.PropertyValuesHolder;
24import android.annotation.SuppressLint;
25import android.annotation.TargetApi;
26import android.app.WallpaperManager;
27import android.appwidget.AppWidgetHostView;
28import android.appwidget.AppWidgetProviderInfo;
29import android.content.ComponentName;
30import android.content.Context;
31import android.content.SharedPreferences;
32import android.content.res.Resources;
33import android.content.res.TypedArray;
34import android.graphics.Bitmap;
35import android.graphics.Canvas;
36import android.graphics.Matrix;
37import android.graphics.Paint;
38import android.graphics.Point;
39import android.graphics.PointF;
40import android.graphics.Rect;
41import android.graphics.Region.Op;
42import android.graphics.drawable.Drawable;
43import android.os.AsyncTask;
44import android.os.Build;
45import android.os.Bundle;
46import android.os.Handler;
47import android.os.IBinder;
48import android.os.Parcelable;
49import android.util.AttributeSet;
50import android.util.Log;
51import android.util.SparseArray;
52import android.view.Choreographer;
53import android.view.Display;
54import android.view.MotionEvent;
55import android.view.View;
56import android.view.ViewGroup;
57import android.view.accessibility.AccessibilityManager;
58import android.view.animation.DecelerateInterpolator;
59import android.view.animation.Interpolator;
60import android.widget.TextView;
61
62import com.android.launcher3.FolderIcon.FolderRingAnimator;
63import com.android.launcher3.Launcher.CustomContentCallbacks;
64import com.android.launcher3.Launcher.LauncherOverlay;
65import com.android.launcher3.LauncherSettings.Favorites;
66import com.android.launcher3.UninstallDropTarget.UninstallSource;
67import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
68import com.android.launcher3.accessibility.LauncherAccessibilityDelegate.AccessibilityDragSource;
69import com.android.launcher3.accessibility.OverviewScreenAccessibilityDelegate;
70import com.android.launcher3.compat.UserHandleCompat;
71import com.android.launcher3.util.LongArrayMap;
72import com.android.launcher3.util.Thunk;
73import com.android.launcher3.util.WallpaperUtils;
74import com.android.launcher3.widget.PendingAddShortcutInfo;
75import com.android.launcher3.widget.PendingAddWidgetInfo;
76
77import java.util.ArrayList;
78import java.util.HashMap;
79import java.util.HashSet;
80import java.util.concurrent.atomic.AtomicInteger;
81
82/**
83 * The workspace is a wide area with a wallpaper and a finite number of pages.
84 * Each page contains a number of icons, folders or widgets the user can
85 * interact with. A workspace is meant to be used with a fixed width only.
86 */
87public class Workspace extends PagedView
88        implements DropTarget, DragSource, DragScroller, View.OnTouchListener,
89        DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener,
90        Insettable, UninstallSource, AccessibilityDragSource, Stats.LaunchSourceProvider {
91    private static final String TAG = "Launcher.Workspace";
92
93    private static boolean ENFORCE_DRAG_EVENT_ORDER = false;
94
95    protected static final int SNAP_OFF_EMPTY_SCREEN_DURATION = 400;
96    protected static final int FADE_EMPTY_SCREEN_DURATION = 150;
97
98    private static final int ADJACENT_SCREEN_DROP_DURATION = 300;
99
100    static final boolean MAP_NO_RECURSE = false;
101    static final boolean MAP_RECURSE = true;
102
103    private static final long CUSTOM_CONTENT_GESTURE_DELAY = 200;
104    private long mTouchDownTime = -1;
105    private long mCustomContentShowTime = -1;
106
107    private LayoutTransition mLayoutTransition;
108    @Thunk final WallpaperManager mWallpaperManager;
109    @Thunk IBinder mWindowToken;
110
111    private int mOriginalDefaultPage;
112    private int mDefaultPage;
113
114    private ShortcutAndWidgetContainer mDragSourceInternal;
115
116    // The screen id used for the empty screen always present to the right.
117    final static long EXTRA_EMPTY_SCREEN_ID = -201;
118    private final static long CUSTOM_CONTENT_SCREEN_ID = -301;
119
120    @Thunk LongArrayMap<CellLayout> mWorkspaceScreens = new LongArrayMap<>();
121    @Thunk ArrayList<Long> mScreenOrder = new ArrayList<Long>();
122
123    @Thunk Runnable mRemoveEmptyScreenRunnable;
124    @Thunk boolean mDeferRemoveExtraEmptyScreen = false;
125    @Thunk boolean mAddNewPageOnDrag = true;
126
127    /**
128     * CellInfo for the cell that is currently being dragged
129     */
130    private CellLayout.CellInfo mDragInfo;
131
132    /**
133     * Target drop area calculated during last acceptDrop call.
134     */
135    @Thunk int[] mTargetCell = new int[2];
136    private int mDragOverX = -1;
137    private int mDragOverY = -1;
138
139    static Rect mLandscapeCellLayoutMetrics = null;
140    static Rect mPortraitCellLayoutMetrics = null;
141
142    CustomContentCallbacks mCustomContentCallbacks;
143    boolean mCustomContentShowing;
144    private float mLastCustomContentScrollProgress = -1f;
145    private String mCustomContentDescription = "";
146
147    /**
148     * The CellLayout that is currently being dragged over
149     */
150    @Thunk CellLayout mDragTargetLayout = null;
151    /**
152     * The CellLayout that we will show as glowing
153     */
154    private CellLayout mDragOverlappingLayout = null;
155
156    /**
157     * The CellLayout which will be dropped to
158     */
159    private CellLayout mDropToLayout = null;
160
161    @Thunk Launcher mLauncher;
162    @Thunk IconCache mIconCache;
163    @Thunk DragController mDragController;
164
165    // These are temporary variables to prevent having to allocate a new object just to
166    // return an (x, y) value from helper functions. Do NOT use them to maintain other state.
167    private int[] mTempCell = new int[2];
168    private int[] mTempPt = new int[2];
169    @Thunk float[] mDragViewVisualCenter = new float[2];
170    private float[] mTempCellLayoutCenterCoordinates = new float[2];
171    private Matrix mTempInverseMatrix = new Matrix();
172
173    private SpringLoadedDragController mSpringLoadedDragController;
174    private float mSpringLoadedShrinkFactor;
175    private float mOverviewModeShrinkFactor;
176
177    // State variable that indicates whether the pages are small (ie when you're
178    // in all apps or customize mode)
179
180    enum State { NORMAL, NORMAL_HIDDEN, SPRING_LOADED, OVERVIEW, OVERVIEW_HIDDEN};
181    private State mState = State.NORMAL;
182    private boolean mIsSwitchingState = false;
183
184    boolean mAnimatingViewIntoPlace = false;
185    boolean mIsDragOccuring = false;
186    boolean mChildrenLayersEnabled = true;
187
188    private boolean mStripScreensOnPageStopMoving = false;
189
190    /** Is the user is dragging an item near the edge of a page? */
191    private boolean mInScrollArea = false;
192
193    private HolographicOutlineHelper mOutlineHelper;
194    @Thunk Bitmap mDragOutline = null;
195    private static final Rect sTempRect = new Rect();
196    private final int[] mTempXY = new int[2];
197    private int[] mTempVisiblePagesRange = new int[2];
198    public static final int DRAG_BITMAP_PADDING = 2;
199    private boolean mWorkspaceFadeInAdjacentScreens;
200
201    WallpaperOffsetInterpolator mWallpaperOffset;
202    @Thunk boolean mWallpaperIsLiveWallpaper;
203    @Thunk int mNumPagesForWallpaperParallax;
204    @Thunk float mLastSetWallpaperOffsetSteps = 0;
205
206    @Thunk Runnable mDelayedResizeRunnable;
207    private Runnable mDelayedSnapToPageRunnable;
208    private Point mDisplaySize = new Point();
209
210    // Variables relating to the creation of user folders by hovering shortcuts over shortcuts
211    private static final int FOLDER_CREATION_TIMEOUT = 0;
212    public static final int REORDER_TIMEOUT = 350;
213    private final Alarm mFolderCreationAlarm = new Alarm();
214    private final Alarm mReorderAlarm = new Alarm();
215    @Thunk FolderRingAnimator mDragFolderRingAnimator = null;
216    private FolderIcon mDragOverFolderIcon = null;
217    private boolean mCreateUserFolderOnDrop = false;
218    private boolean mAddToExistingFolderOnDrop = false;
219    private float mMaxDistanceForFolderCreation;
220
221    private final Canvas mCanvas = new Canvas();
222
223    // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
224    private float mXDown;
225    private float mYDown;
226    final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
227    final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
228    final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
229
230    // Relating to the animation of items being dropped externally
231    public static final int ANIMATE_INTO_POSITION_AND_DISAPPEAR = 0;
232    public static final int ANIMATE_INTO_POSITION_AND_REMAIN = 1;
233    public static final int ANIMATE_INTO_POSITION_AND_RESIZE = 2;
234    public static final int COMPLETE_TWO_STAGE_WIDGET_DROP_ANIMATION = 3;
235    public static final int CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION = 4;
236
237    // Related to dragging, folder creation and reordering
238    private static final int DRAG_MODE_NONE = 0;
239    private static final int DRAG_MODE_CREATE_FOLDER = 1;
240    private static final int DRAG_MODE_ADD_TO_FOLDER = 2;
241    private static final int DRAG_MODE_REORDER = 3;
242    private int mDragMode = DRAG_MODE_NONE;
243    @Thunk int mLastReorderX = -1;
244    @Thunk int mLastReorderY = -1;
245
246    private SparseArray<Parcelable> mSavedStates;
247    private final ArrayList<Integer> mRestoredPages = new ArrayList<Integer>();
248
249    // These variables are used for storing the initial and final values during workspace animations
250    private int mSavedScrollX;
251    private float mSavedRotationY;
252    private float mSavedTranslationX;
253
254    private float mCurrentScale;
255    private float mTransitionProgress;
256
257    @Thunk Runnable mDeferredAction;
258    private boolean mDeferDropAfterUninstall;
259    private boolean mUninstallSuccessful;
260
261    // State related to Launcher Overlay
262    LauncherOverlay mLauncherOverlay;
263    boolean mScrollInteractionBegan;
264    boolean mStartedSendingScrollEvents;
265    boolean mShouldSendPageSettled;
266    int mLastOverlaySroll = 0;
267
268    // Handles workspace state transitions
269    private WorkspaceStateTransitionAnimation mStateTransitionAnimation;
270
271    private AccessibilityDelegate mPagesAccessibilityDelegate;
272
273    private final Runnable mBindPages = new Runnable() {
274        @Override
275        public void run() {
276            mLauncher.getModel().bindRemainingSynchronousPages();
277        }
278    };
279
280    /**
281     * Used to inflate the Workspace from XML.
282     *
283     * @param context The application's context.
284     * @param attrs The attributes set containing the Workspace's customization values.
285     */
286    public Workspace(Context context, AttributeSet attrs) {
287        this(context, attrs, 0);
288    }
289
290    /**
291     * Used to inflate the Workspace from XML.
292     *
293     * @param context The application's context.
294     * @param attrs The attributes set containing the Workspace's customization values.
295     * @param defStyle Unused.
296     */
297    public Workspace(Context context, AttributeSet attrs, int defStyle) {
298        super(context, attrs, defStyle);
299
300        mOutlineHelper = HolographicOutlineHelper.obtain(context);
301
302        mLauncher = (Launcher) context;
303        mStateTransitionAnimation = new WorkspaceStateTransitionAnimation(mLauncher, this);
304        final Resources res = getResources();
305        DeviceProfile grid = mLauncher.getDeviceProfile();
306        mWorkspaceFadeInAdjacentScreens = grid.shouldFadeAdjacentWorkspaceScreens();
307        mFadeInAdjacentScreens = false;
308        mWallpaperManager = WallpaperManager.getInstance(context);
309
310        TypedArray a = context.obtainStyledAttributes(attrs,
311                R.styleable.Workspace, defStyle, 0);
312        mSpringLoadedShrinkFactor =
313            res.getInteger(R.integer.config_workspaceSpringLoadShrinkPercentage) / 100.0f;
314        mOverviewModeShrinkFactor = grid.getOverviewModeScale(mIsRtl);
315        mOriginalDefaultPage = mDefaultPage = a.getInt(R.styleable.Workspace_defaultScreen, 1);
316        a.recycle();
317
318        setOnHierarchyChangeListener(this);
319        setHapticFeedbackEnabled(false);
320
321        initWorkspace();
322
323        // Disable multitouch across the workspace/all apps/customize tray
324        setMotionEventSplittingEnabled(true);
325    }
326
327    @Override
328    public void setInsets(Rect insets) {
329        mInsets.set(insets);
330
331        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
332        if (customScreen != null) {
333            View customContent = customScreen.getShortcutsAndWidgets().getChildAt(0);
334            if (customContent instanceof Insettable) {
335                ((Insettable) customContent).setInsets(mInsets);
336            }
337        }
338    }
339
340    // estimate the size of a widget with spans hSpan, vSpan. return MAX_VALUE for each
341    // dimension if unsuccessful
342    public int[] estimateItemSize(ItemInfo itemInfo, boolean springLoaded) {
343        int[] size = new int[2];
344        if (getChildCount() > 0) {
345            // Use the first non-custom page to estimate the child position
346            CellLayout cl = (CellLayout) getChildAt(numCustomPages());
347            Rect r = estimateItemPosition(cl, itemInfo, 0, 0, itemInfo.spanX, itemInfo.spanY);
348            size[0] = r.width();
349            size[1] = r.height();
350            if (springLoaded) {
351                size[0] *= mSpringLoadedShrinkFactor;
352                size[1] *= mSpringLoadedShrinkFactor;
353            }
354            return size;
355        } else {
356            size[0] = Integer.MAX_VALUE;
357            size[1] = Integer.MAX_VALUE;
358            return size;
359        }
360    }
361
362    public Rect estimateItemPosition(CellLayout cl, ItemInfo pendingInfo,
363            int hCell, int vCell, int hSpan, int vSpan) {
364        Rect r = new Rect();
365        cl.cellToRect(hCell, vCell, hSpan, vSpan, r);
366        return r;
367    }
368
369    @Override
370    public void onDragStart(final DragSource source, ItemInfo info, int dragAction) {
371        if (ENFORCE_DRAG_EVENT_ORDER) {
372            enfoceDragParity("onDragStart", 0, 0);
373        }
374
375        mIsDragOccuring = true;
376        updateChildrenLayersEnabled(false);
377        mLauncher.lockScreenOrientation();
378        mLauncher.onInteractionBegin();
379        // Prevent any Un/InstallShortcutReceivers from updating the db while we are dragging
380        InstallShortcutReceiver.enableInstallQueue();
381
382        if (mAddNewPageOnDrag) {
383            mDeferRemoveExtraEmptyScreen = false;
384            addExtraEmptyScreenOnDrag();
385        }
386    }
387
388    public void setAddNewPageOnDrag(boolean addPage) {
389        mAddNewPageOnDrag = addPage;
390    }
391
392    public void deferRemoveExtraEmptyScreen() {
393        mDeferRemoveExtraEmptyScreen = true;
394    }
395
396    @Override
397    public void onDragEnd() {
398        if (ENFORCE_DRAG_EVENT_ORDER) {
399            enfoceDragParity("onDragEnd", 0, 0);
400        }
401
402        if (!mDeferRemoveExtraEmptyScreen) {
403            removeExtraEmptyScreen(true, mDragSourceInternal != null);
404        }
405
406        mIsDragOccuring = false;
407        updateChildrenLayersEnabled(false);
408        mLauncher.unlockScreenOrientation(false);
409
410        // Re-enable any Un/InstallShortcutReceiver and now process any queued items
411        InstallShortcutReceiver.disableAndFlushInstallQueue(getContext());
412
413        mDragSourceInternal = null;
414        mLauncher.onInteractionEnd();
415    }
416
417    /**
418     * Initializes various states for this workspace.
419     */
420    protected void initWorkspace() {
421        mCurrentPage = mDefaultPage;
422        LauncherAppState app = LauncherAppState.getInstance();
423        DeviceProfile grid = mLauncher.getDeviceProfile();
424        mIconCache = app.getIconCache();
425        setWillNotDraw(false);
426        setClipChildren(false);
427        setClipToPadding(false);
428        setChildrenDrawnWithCacheEnabled(true);
429
430        setMinScale(mOverviewModeShrinkFactor);
431        setupLayoutTransition();
432
433        mWallpaperOffset = new WallpaperOffsetInterpolator();
434        Display display = mLauncher.getWindowManager().getDefaultDisplay();
435        display.getSize(mDisplaySize);
436
437        mMaxDistanceForFolderCreation = (0.55f * grid.iconSizePx);
438
439        // Set the wallpaper dimensions when Launcher starts up
440        setWallpaperDimension();
441
442        setEdgeGlowColor(getResources().getColor(R.color.workspace_edge_effect_color));
443    }
444
445    private void setupLayoutTransition() {
446        // We want to show layout transitions when pages are deleted, to close the gap.
447        mLayoutTransition = new LayoutTransition();
448        mLayoutTransition.enableTransitionType(LayoutTransition.DISAPPEARING);
449        mLayoutTransition.enableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
450        mLayoutTransition.disableTransitionType(LayoutTransition.APPEARING);
451        mLayoutTransition.disableTransitionType(LayoutTransition.CHANGE_APPEARING);
452        setLayoutTransition(mLayoutTransition);
453    }
454
455    void enableLayoutTransitions() {
456        setLayoutTransition(mLayoutTransition);
457    }
458    void disableLayoutTransitions() {
459        setLayoutTransition(null);
460    }
461
462    @Override
463    public void onChildViewAdded(View parent, View child) {
464        if (!(child instanceof CellLayout)) {
465            throw new IllegalArgumentException("A Workspace can only have CellLayout children.");
466        }
467        CellLayout cl = ((CellLayout) child);
468        cl.setOnInterceptTouchListener(this);
469        cl.setClickable(true);
470        cl.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
471        super.onChildViewAdded(parent, child);
472    }
473
474    protected boolean shouldDrawChild(View child) {
475        final CellLayout cl = (CellLayout) child;
476        return super.shouldDrawChild(child) &&
477            (mIsSwitchingState ||
478             cl.getShortcutsAndWidgets().getAlpha() > 0 ||
479             cl.getBackgroundAlpha() > 0);
480    }
481
482    /**
483     * @return The open folder on the current screen, or null if there is none
484     */
485    public Folder getOpenFolder() {
486        DragLayer dragLayer = mLauncher.getDragLayer();
487        int count = dragLayer.getChildCount();
488        for (int i = 0; i < count; i++) {
489            View child = dragLayer.getChildAt(i);
490            if (child instanceof Folder) {
491                Folder folder = (Folder) child;
492                if (folder.getInfo().opened)
493                    return folder;
494            }
495        }
496        return null;
497    }
498
499    boolean isTouchActive() {
500        return mTouchState != TOUCH_STATE_REST;
501    }
502
503    public void removeAllWorkspaceScreens() {
504        // Disable all layout transitions before removing all pages to ensure that we don't get the
505        // transition animations competing with us changing the scroll when we add pages or the
506        // custom content screen
507        disableLayoutTransitions();
508
509        // Since we increment the current page when we call addCustomContentPage via bindScreens
510        // (and other places), we need to adjust the current page back when we clear the pages
511        if (hasCustomContent()) {
512            removeCustomContentPage();
513        }
514
515        // Remove the pages and clear the screen models
516        removeAllViews();
517        mScreenOrder.clear();
518        mWorkspaceScreens.clear();
519
520        // Re-enable the layout transitions
521        enableLayoutTransitions();
522    }
523
524    public long insertNewWorkspaceScreenBeforeEmptyScreen(long screenId) {
525        // Find the index to insert this view into.  If the empty screen exists, then
526        // insert it before that.
527        int insertIndex = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
528        if (insertIndex < 0) {
529            insertIndex = mScreenOrder.size();
530        }
531        return insertNewWorkspaceScreen(screenId, insertIndex);
532    }
533
534    public long insertNewWorkspaceScreen(long screenId) {
535        return insertNewWorkspaceScreen(screenId, getChildCount());
536    }
537
538    public long insertNewWorkspaceScreen(long screenId, int insertIndex) {
539        if (mWorkspaceScreens.containsKey(screenId)) {
540            throw new RuntimeException("Screen id " + screenId + " already exists!");
541        }
542
543        // Inflate the cell layout, but do not add it automatically so that we can get the newly
544        // created CellLayout.
545        CellLayout newScreen = (CellLayout) mLauncher.getLayoutInflater().inflate(
546                        R.layout.workspace_screen, this, false /* attachToRoot */);
547
548        newScreen.setOnLongClickListener(mLongClickListener);
549        newScreen.setOnClickListener(mLauncher);
550        newScreen.setSoundEffectsEnabled(false);
551        mWorkspaceScreens.put(screenId, newScreen);
552        mScreenOrder.add(insertIndex, screenId);
553        addView(newScreen, insertIndex);
554
555        LauncherAccessibilityDelegate delegate =
556                LauncherAppState.getInstance().getAccessibilityDelegate();
557        if (delegate != null && delegate.isInAccessibleDrag()) {
558            newScreen.enableAccessibleDrag(true, CellLayout.WORKSPACE_ACCESSIBILITY_DRAG);
559        }
560        return screenId;
561    }
562
563    public void createCustomContentContainer() {
564        CellLayout customScreen = (CellLayout)
565                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, this, false);
566        customScreen.disableDragTarget();
567
568        mWorkspaceScreens.put(CUSTOM_CONTENT_SCREEN_ID, customScreen);
569        mScreenOrder.add(0, CUSTOM_CONTENT_SCREEN_ID);
570
571        // We want no padding on the custom content
572        customScreen.setPadding(0, 0, 0, 0);
573
574        addFullScreenPage(customScreen);
575
576        // Ensure that the current page and default page are maintained.
577        mDefaultPage = mOriginalDefaultPage + 1;
578
579        // Update the custom content hint
580        if (mRestorePage != INVALID_RESTORE_PAGE) {
581            mRestorePage = mRestorePage + 1;
582        } else {
583            setCurrentPage(getCurrentPage() + 1);
584        }
585    }
586
587    public void removeCustomContentPage() {
588        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
589        if (customScreen == null) {
590            throw new RuntimeException("Expected custom content screen to exist");
591        }
592
593        mWorkspaceScreens.remove(CUSTOM_CONTENT_SCREEN_ID);
594        mScreenOrder.remove(CUSTOM_CONTENT_SCREEN_ID);
595        removeView(customScreen);
596
597        if (mCustomContentCallbacks != null) {
598            mCustomContentCallbacks.onScrollProgressChanged(0);
599            mCustomContentCallbacks.onHide();
600        }
601
602        mCustomContentCallbacks = null;
603
604        // Ensure that the current page and default page are maintained.
605        mDefaultPage = mOriginalDefaultPage - 1;
606
607        // Update the custom content hint
608        if (mRestorePage != INVALID_RESTORE_PAGE) {
609            mRestorePage = mRestorePage - 1;
610        } else {
611            setCurrentPage(getCurrentPage() - 1);
612        }
613    }
614
615    public void addToCustomContentPage(View customContent, CustomContentCallbacks callbacks,
616            String description) {
617        if (getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID) < 0) {
618            throw new RuntimeException("Expected custom content screen to exist");
619        }
620
621        // Add the custom content to the full screen custom page
622        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
623        int spanX = customScreen.getCountX();
624        int spanY = customScreen.getCountY();
625        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, spanX, spanY);
626        lp.canReorder  = false;
627        lp.isFullscreen = true;
628        if (customContent instanceof Insettable) {
629            ((Insettable)customContent).setInsets(mInsets);
630        }
631
632        // Verify that the child is removed from any existing parent.
633        if (customContent.getParent() instanceof ViewGroup) {
634            ViewGroup parent = (ViewGroup) customContent.getParent();
635            parent.removeView(customContent);
636        }
637        customScreen.removeAllViews();
638        customScreen.addViewToCellLayout(customContent, 0, 0, lp, true);
639        mCustomContentDescription = description;
640
641        mCustomContentCallbacks = callbacks;
642    }
643
644    public void addExtraEmptyScreenOnDrag() {
645        boolean lastChildOnScreen = false;
646        boolean childOnFinalScreen = false;
647
648        // Cancel any pending removal of empty screen
649        mRemoveEmptyScreenRunnable = null;
650
651        if (mDragSourceInternal != null) {
652            if (mDragSourceInternal.getChildCount() == 1) {
653                lastChildOnScreen = true;
654            }
655            CellLayout cl = (CellLayout) mDragSourceInternal.getParent();
656            if (indexOfChild(cl) == getChildCount() - 1) {
657                childOnFinalScreen = true;
658            }
659        }
660
661        // If this is the last item on the final screen
662        if (lastChildOnScreen && childOnFinalScreen) {
663            return;
664        }
665        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
666            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
667        }
668    }
669
670    public boolean addExtraEmptyScreen() {
671        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
672            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
673            return true;
674        }
675        return false;
676    }
677
678    private void convertFinalScreenToEmptyScreenIfNecessary() {
679        if (mLauncher.isWorkspaceLoading()) {
680            // Invalid and dangerous operation if workspace is loading
681            Launcher.addDumpLog(TAG, "    - workspace loading, skip", true);
682            return;
683        }
684
685        if (hasExtraEmptyScreen() || mScreenOrder.size() == 0) return;
686        long finalScreenId = mScreenOrder.get(mScreenOrder.size() - 1);
687
688        if (finalScreenId == CUSTOM_CONTENT_SCREEN_ID) return;
689        CellLayout finalScreen = mWorkspaceScreens.get(finalScreenId);
690
691        // If the final screen is empty, convert it to the extra empty screen
692        if (finalScreen.getShortcutsAndWidgets().getChildCount() == 0 &&
693                !finalScreen.isDropPending()) {
694            mWorkspaceScreens.remove(finalScreenId);
695            mScreenOrder.remove(finalScreenId);
696
697            // if this is the last non-custom content screen, convert it to the empty screen
698            mWorkspaceScreens.put(EXTRA_EMPTY_SCREEN_ID, finalScreen);
699            mScreenOrder.add(EXTRA_EMPTY_SCREEN_ID);
700
701            // Update the model if we have changed any screens
702            mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
703        }
704    }
705
706    public void removeExtraEmptyScreen(final boolean animate, boolean stripEmptyScreens) {
707        removeExtraEmptyScreenDelayed(animate, null, 0, stripEmptyScreens);
708    }
709
710    public void removeExtraEmptyScreenDelayed(final boolean animate, final Runnable onComplete,
711            final int delay, final boolean stripEmptyScreens) {
712        if (mLauncher.isWorkspaceLoading()) {
713            // Don't strip empty screens if the workspace is still loading
714            Launcher.addDumpLog(TAG, "    - workspace loading, skip", true);
715            return;
716        }
717
718        if (delay > 0) {
719            postDelayed(new Runnable() {
720                @Override
721                public void run() {
722                    removeExtraEmptyScreenDelayed(animate, onComplete, 0, stripEmptyScreens);
723                }
724            }, delay);
725            return;
726        }
727
728        convertFinalScreenToEmptyScreenIfNecessary();
729        if (hasExtraEmptyScreen()) {
730            int emptyIndex = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
731            if (getNextPage() == emptyIndex) {
732                snapToPage(getNextPage() - 1, SNAP_OFF_EMPTY_SCREEN_DURATION);
733                fadeAndRemoveEmptyScreen(SNAP_OFF_EMPTY_SCREEN_DURATION, FADE_EMPTY_SCREEN_DURATION,
734                        onComplete, stripEmptyScreens);
735            } else {
736                snapToPage(getNextPage(), 0);
737                fadeAndRemoveEmptyScreen(0, FADE_EMPTY_SCREEN_DURATION,
738                        onComplete, stripEmptyScreens);
739            }
740            return;
741        } else if (stripEmptyScreens) {
742            // If we're not going to strip the empty screens after removing
743            // the extra empty screen, do it right away.
744            stripEmptyScreens();
745        }
746
747        if (onComplete != null) {
748            onComplete.run();
749        }
750    }
751
752    private void fadeAndRemoveEmptyScreen(int delay, int duration, final Runnable onComplete,
753            final boolean stripEmptyScreens) {
754        // XXX: Do we need to update LM workspace screens below?
755        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0f);
756        PropertyValuesHolder bgAlpha = PropertyValuesHolder.ofFloat("backgroundAlpha", 0f);
757
758        final CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
759
760        mRemoveEmptyScreenRunnable = new Runnable() {
761            @Override
762            public void run() {
763                if (hasExtraEmptyScreen()) {
764                    mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
765                    mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
766                    removeView(cl);
767                    if (stripEmptyScreens) {
768                        stripEmptyScreens();
769                    }
770                }
771            }
772        };
773
774        ObjectAnimator oa = ObjectAnimator.ofPropertyValuesHolder(cl, alpha, bgAlpha);
775        oa.setDuration(duration);
776        oa.setStartDelay(delay);
777        oa.addListener(new AnimatorListenerAdapter() {
778            @Override
779            public void onAnimationEnd(Animator animation) {
780                if (mRemoveEmptyScreenRunnable != null) {
781                    mRemoveEmptyScreenRunnable.run();
782                }
783                if (onComplete != null) {
784                    onComplete.run();
785                }
786            }
787        });
788        oa.start();
789    }
790
791    public boolean hasExtraEmptyScreen() {
792        int nScreens = getChildCount();
793        nScreens = nScreens - numCustomPages();
794        return mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID) && nScreens > 1;
795    }
796
797    public long commitExtraEmptyScreen() {
798        if (mLauncher.isWorkspaceLoading()) {
799            // Invalid and dangerous operation if workspace is loading
800            Launcher.addDumpLog(TAG, "    - workspace loading, skip", true);
801            return -1;
802        }
803
804        int index = getPageIndexForScreenId(EXTRA_EMPTY_SCREEN_ID);
805        CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
806        mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
807        mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
808
809        long newId = LauncherAppState.getLauncherProvider().generateNewScreenId();
810        mWorkspaceScreens.put(newId, cl);
811        mScreenOrder.add(newId);
812
813        // Update the page indicator marker
814        if (getPageIndicator() != null) {
815            getPageIndicator().updateMarker(index, getPageIndicatorMarker(index));
816        }
817
818        // Update the model for the new screen
819        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
820
821        return newId;
822    }
823
824    public CellLayout getScreenWithId(long screenId) {
825        CellLayout layout = mWorkspaceScreens.get(screenId);
826        return layout;
827    }
828
829    public long getIdForScreen(CellLayout layout) {
830        int index = mWorkspaceScreens.indexOfValue(layout);
831        if (index != -1) {
832            return mWorkspaceScreens.keyAt(index);
833        }
834        return -1;
835    }
836
837    public int getPageIndexForScreenId(long screenId) {
838        return indexOfChild(mWorkspaceScreens.get(screenId));
839    }
840
841    public long getScreenIdForPageIndex(int index) {
842        if (0 <= index && index < mScreenOrder.size()) {
843            return mScreenOrder.get(index);
844        }
845        return -1;
846    }
847
848    public ArrayList<Long> getScreenOrder() {
849        return mScreenOrder;
850    }
851
852    public void stripEmptyScreens() {
853        if (mLauncher.isWorkspaceLoading()) {
854            // Don't strip empty screens if the workspace is still loading.
855            // This is dangerous and can result in data loss.
856            Launcher.addDumpLog(TAG, "    - workspace loading, skip", true);
857            return;
858        }
859
860        if (isPageMoving()) {
861            mStripScreensOnPageStopMoving = true;
862            return;
863        }
864
865        int currentPage = getNextPage();
866        ArrayList<Long> removeScreens = new ArrayList<Long>();
867        int total = mWorkspaceScreens.size();
868        for (int i = 0; i < total; i++) {
869            long id = mWorkspaceScreens.keyAt(i);
870            CellLayout cl = mWorkspaceScreens.valueAt(i);
871            if (id >= 0 && cl.getShortcutsAndWidgets().getChildCount() == 0) {
872                removeScreens.add(id);
873            }
874        }
875
876        // We enforce at least one page to add new items to. In the case that we remove the last
877        // such screen, we convert the last screen to the empty screen
878        int minScreens = 1 + numCustomPages();
879
880        int pageShift = 0;
881        for (Long id: removeScreens) {
882            CellLayout cl = mWorkspaceScreens.get(id);
883            mWorkspaceScreens.remove(id);
884            mScreenOrder.remove(id);
885
886            if (getChildCount() > minScreens) {
887                if (indexOfChild(cl) < currentPage) {
888                    pageShift++;
889                }
890                removeView(cl);
891            } else {
892                // if this is the last non-custom content screen, convert it to the empty screen
893                mRemoveEmptyScreenRunnable = null;
894                mWorkspaceScreens.put(EXTRA_EMPTY_SCREEN_ID, cl);
895                mScreenOrder.add(EXTRA_EMPTY_SCREEN_ID);
896            }
897        }
898
899        if (!removeScreens.isEmpty()) {
900            // Update the model if we have changed any screens
901            mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
902        }
903
904        if (pageShift >= 0) {
905            setCurrentPage(currentPage - pageShift);
906        }
907    }
908
909    // See implementation for parameter definition.
910    void addInScreen(View child, long container, long screenId,
911            int x, int y, int spanX, int spanY) {
912        addInScreen(child, container, screenId, x, y, spanX, spanY, false, false);
913    }
914
915    // At bind time, we use the rank (screenId) to compute x and y for hotseat items.
916    // See implementation for parameter definition.
917    void addInScreenFromBind(View child, long container, long screenId, int x, int y,
918            int spanX, int spanY) {
919        addInScreen(child, container, screenId, x, y, spanX, spanY, false, true);
920    }
921
922    // See implementation for parameter definition.
923    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
924            boolean insert) {
925        addInScreen(child, container, screenId, x, y, spanX, spanY, insert, false);
926    }
927
928    /**
929     * Adds the specified child in the specified screen. The position and dimension of
930     * the child are defined by x, y, spanX and spanY.
931     *
932     * @param child The child to add in one of the workspace's screens.
933     * @param screenId The screen in which to add the child.
934     * @param x The X position of the child in the screen's grid.
935     * @param y The Y position of the child in the screen's grid.
936     * @param spanX The number of cells spanned horizontally by the child.
937     * @param spanY The number of cells spanned vertically by the child.
938     * @param insert When true, the child is inserted at the beginning of the children list.
939     * @param computeXYFromRank When true, we use the rank (stored in screenId) to compute
940     *                          the x and y position in which to place hotseat items. Otherwise
941     *                          we use the x and y position to compute the rank.
942     */
943    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
944            boolean insert, boolean computeXYFromRank) {
945        if (container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
946            if (getScreenWithId(screenId) == null) {
947                Log.e(TAG, "Skipping child, screenId " + screenId + " not found");
948                // DEBUGGING - Print out the stack trace to see where we are adding from
949                new Throwable().printStackTrace();
950                return;
951            }
952        }
953        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
954            // This should never happen
955            throw new RuntimeException("Screen id should not be EXTRA_EMPTY_SCREEN_ID");
956        }
957
958        final CellLayout layout;
959        if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
960            layout = mLauncher.getHotseat().getLayout();
961            child.setOnKeyListener(new HotseatIconKeyEventListener());
962
963            // Hide folder title in the hotseat
964            if (child instanceof FolderIcon) {
965                ((FolderIcon) child).setTextVisible(false);
966            }
967
968            if (computeXYFromRank) {
969                x = mLauncher.getHotseat().getCellXFromOrder((int) screenId);
970                y = mLauncher.getHotseat().getCellYFromOrder((int) screenId);
971            } else {
972                screenId = mLauncher.getHotseat().getOrderInHotseat(x, y);
973            }
974        } else {
975            // Show folder title if not in the hotseat
976            if (child instanceof FolderIcon) {
977                ((FolderIcon) child).setTextVisible(true);
978            }
979            layout = getScreenWithId(screenId);
980            child.setOnKeyListener(new IconKeyEventListener());
981        }
982
983        ViewGroup.LayoutParams genericLp = child.getLayoutParams();
984        CellLayout.LayoutParams lp;
985        if (genericLp == null || !(genericLp instanceof CellLayout.LayoutParams)) {
986            lp = new CellLayout.LayoutParams(x, y, spanX, spanY);
987        } else {
988            lp = (CellLayout.LayoutParams) genericLp;
989            lp.cellX = x;
990            lp.cellY = y;
991            lp.cellHSpan = spanX;
992            lp.cellVSpan = spanY;
993        }
994
995        if (spanX < 0 && spanY < 0) {
996            lp.isLockedToGrid = false;
997        }
998
999        // Get the canonical child id to uniquely represent this view in this screen
1000        ItemInfo info = (ItemInfo) child.getTag();
1001        int childId = mLauncher.getViewIdForItem(info);
1002
1003        boolean markCellsAsOccupied = !(child instanceof Folder);
1004        if (!layout.addViewToCellLayout(child, insert ? 0 : -1, childId, lp, markCellsAsOccupied)) {
1005            // TODO: This branch occurs when the workspace is adding views
1006            // outside of the defined grid
1007            // maybe we should be deleting these items from the LauncherModel?
1008            Launcher.addDumpLog(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout", true);
1009        }
1010
1011        if (!(child instanceof Folder)) {
1012            child.setHapticFeedbackEnabled(false);
1013            child.setOnLongClickListener(mLongClickListener);
1014        }
1015        if (child instanceof DropTarget) {
1016            mDragController.addDropTarget((DropTarget) child);
1017        }
1018    }
1019
1020    /**
1021     * Called directly from a CellLayout (not by the framework), after we've been added as a
1022     * listener via setOnInterceptTouchEventListener(). This allows us to tell the CellLayout
1023     * that it should intercept touch events, which is not something that is normally supported.
1024     */
1025    @SuppressLint("ClickableViewAccessibility")
1026    @Override
1027    public boolean onTouch(View v, MotionEvent event) {
1028        return (workspaceInModalState() || !isFinishedSwitchingState())
1029                || (!workspaceInModalState() && indexOfChild(v) != mCurrentPage);
1030    }
1031
1032    public boolean isSwitchingState() {
1033        return mIsSwitchingState;
1034    }
1035
1036    /** This differs from isSwitchingState in that we take into account how far the transition
1037     *  has completed. */
1038    public boolean isFinishedSwitchingState() {
1039        return !mIsSwitchingState || (mTransitionProgress > 0.5f);
1040    }
1041
1042    protected void onWindowVisibilityChanged (int visibility) {
1043        mLauncher.onWindowVisibilityChanged(visibility);
1044    }
1045
1046    @Override
1047    public boolean dispatchUnhandledMove(View focused, int direction) {
1048        if (workspaceInModalState() || !isFinishedSwitchingState()) {
1049            // when the home screens are shrunken, shouldn't allow side-scrolling
1050            return false;
1051        }
1052        return super.dispatchUnhandledMove(focused, direction);
1053    }
1054
1055    @Override
1056    public boolean onInterceptTouchEvent(MotionEvent ev) {
1057        switch (ev.getAction() & MotionEvent.ACTION_MASK) {
1058        case MotionEvent.ACTION_DOWN:
1059            mXDown = ev.getX();
1060            mYDown = ev.getY();
1061            mTouchDownTime = System.currentTimeMillis();
1062            break;
1063        case MotionEvent.ACTION_POINTER_UP:
1064        case MotionEvent.ACTION_UP:
1065            if (mTouchState == TOUCH_STATE_REST) {
1066                final CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage);
1067                if (currentPage != null) {
1068                    onWallpaperTap(ev);
1069                }
1070            }
1071        }
1072        return super.onInterceptTouchEvent(ev);
1073    }
1074
1075    @Override
1076    public boolean onGenericMotionEvent(MotionEvent event) {
1077        // Ignore pointer scroll events if the custom content doesn't allow scrolling.
1078        if ((getScreenIdForPageIndex(getCurrentPage()) == CUSTOM_CONTENT_SCREEN_ID)
1079                && (mCustomContentCallbacks != null)
1080                && !mCustomContentCallbacks.isScrollingAllowed()) {
1081            return false;
1082        }
1083        return super.onGenericMotionEvent(event);
1084    }
1085
1086    protected void reinflateWidgetsIfNecessary() {
1087        final int clCount = getChildCount();
1088        for (int i = 0; i < clCount; i++) {
1089            CellLayout cl = (CellLayout) getChildAt(i);
1090            ShortcutAndWidgetContainer swc = cl.getShortcutsAndWidgets();
1091            final int itemCount = swc.getChildCount();
1092            for (int j = 0; j < itemCount; j++) {
1093                View v = swc.getChildAt(j);
1094
1095                if (v != null  && v.getTag() instanceof LauncherAppWidgetInfo) {
1096                    LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) v.getTag();
1097                    LauncherAppWidgetHostView lahv = (LauncherAppWidgetHostView) info.hostView;
1098                    if (lahv != null && lahv.isReinflateRequired()) {
1099                        mLauncher.removeAppWidget(info);
1100                        // Remove the current widget which is inflated with the wrong orientation
1101                        cl.removeView(lahv);
1102                        mLauncher.bindAppWidget(info);
1103                    }
1104                }
1105            }
1106        }
1107    }
1108
1109    @Override
1110    protected void determineScrollingStart(MotionEvent ev) {
1111        if (!isFinishedSwitchingState()) return;
1112
1113        float deltaX = ev.getX() - mXDown;
1114        float absDeltaX = Math.abs(deltaX);
1115        float absDeltaY = Math.abs(ev.getY() - mYDown);
1116
1117        if (Float.compare(absDeltaX, 0f) == 0) return;
1118
1119        float slope = absDeltaY / absDeltaX;
1120        float theta = (float) Math.atan(slope);
1121
1122        if (absDeltaX > mTouchSlop || absDeltaY > mTouchSlop) {
1123            cancelCurrentPageLongPress();
1124        }
1125
1126        boolean passRightSwipesToCustomContent =
1127                (mTouchDownTime - mCustomContentShowTime) > CUSTOM_CONTENT_GESTURE_DELAY;
1128
1129        boolean swipeInIgnoreDirection = mIsRtl ? deltaX < 0 : deltaX > 0;
1130        boolean onCustomContentScreen =
1131                getScreenIdForPageIndex(getCurrentPage()) == CUSTOM_CONTENT_SCREEN_ID;
1132        if (swipeInIgnoreDirection && onCustomContentScreen && passRightSwipesToCustomContent) {
1133            // Pass swipes to the right to the custom content page.
1134            return;
1135        }
1136
1137        if (onCustomContentScreen && (mCustomContentCallbacks != null)
1138                && !mCustomContentCallbacks.isScrollingAllowed()) {
1139            // Don't allow workspace scrolling if the current custom content screen doesn't allow
1140            // scrolling.
1141            return;
1142        }
1143
1144        if (theta > MAX_SWIPE_ANGLE) {
1145            // Above MAX_SWIPE_ANGLE, we don't want to ever start scrolling the workspace
1146            return;
1147        } else if (theta > START_DAMPING_TOUCH_SLOP_ANGLE) {
1148            // Above START_DAMPING_TOUCH_SLOP_ANGLE and below MAX_SWIPE_ANGLE, we want to
1149            // increase the touch slop to make it harder to begin scrolling the workspace. This
1150            // results in vertically scrolling widgets to more easily. The higher the angle, the
1151            // more we increase touch slop.
1152            theta -= START_DAMPING_TOUCH_SLOP_ANGLE;
1153            float extraRatio = (float)
1154                    Math.sqrt((theta / (MAX_SWIPE_ANGLE - START_DAMPING_TOUCH_SLOP_ANGLE)));
1155            super.determineScrollingStart(ev, 1 + TOUCH_SLOP_DAMPING_FACTOR * extraRatio);
1156        } else {
1157            // Below START_DAMPING_TOUCH_SLOP_ANGLE, we don't do anything special
1158            super.determineScrollingStart(ev);
1159        }
1160    }
1161
1162    protected void onPageBeginMoving() {
1163        super.onPageBeginMoving();
1164
1165        if (isHardwareAccelerated()) {
1166            updateChildrenLayersEnabled(false);
1167        } else {
1168            if (mNextPage != INVALID_PAGE) {
1169                // we're snapping to a particular screen
1170                enableChildrenCache(mCurrentPage, mNextPage);
1171            } else {
1172                // this is when user is actively dragging a particular screen, they might
1173                // swipe it either left or right (but we won't advance by more than one screen)
1174                enableChildrenCache(mCurrentPage - 1, mCurrentPage + 1);
1175            }
1176        }
1177    }
1178
1179    protected void onPageEndMoving() {
1180        super.onPageEndMoving();
1181
1182        if (isHardwareAccelerated()) {
1183            updateChildrenLayersEnabled(false);
1184        } else {
1185            clearChildrenCache();
1186        }
1187
1188        if (mDragController.isDragging()) {
1189            if (workspaceInModalState()) {
1190                // If we are in springloaded mode, then force an event to check if the current touch
1191                // is under a new page (to scroll to)
1192                mDragController.forceTouchMove();
1193            }
1194        }
1195
1196        if (mDelayedResizeRunnable != null) {
1197            mDelayedResizeRunnable.run();
1198            mDelayedResizeRunnable = null;
1199        }
1200
1201        if (mDelayedSnapToPageRunnable != null) {
1202            mDelayedSnapToPageRunnable.run();
1203            mDelayedSnapToPageRunnable = null;
1204        }
1205        if (mStripScreensOnPageStopMoving) {
1206            stripEmptyScreens();
1207            mStripScreensOnPageStopMoving = false;
1208        }
1209
1210        if (mShouldSendPageSettled) {
1211            mLauncherOverlay.onScrollSettled();
1212            mShouldSendPageSettled = false;
1213        }
1214    }
1215
1216    protected void onScrollInteractionBegin() {
1217        super.onScrollInteractionEnd();
1218        mScrollInteractionBegan = true;
1219    }
1220
1221    protected void onScrollInteractionEnd() {
1222        super.onScrollInteractionEnd();
1223        mScrollInteractionBegan = false;
1224        if (mStartedSendingScrollEvents) {
1225            mStartedSendingScrollEvents = false;
1226            mLauncherOverlay.onScrollInteractionEnd();
1227        }
1228    }
1229
1230    public void setLauncherOverlay(LauncherOverlay overlay) {
1231        mLauncherOverlay = overlay;
1232    }
1233
1234    @Override
1235    protected void overScroll(float amount) {
1236        boolean shouldOverScroll = (amount <= 0 && (!hasCustomContent() || mIsRtl)) ||
1237                (amount >= 0 && (!hasCustomContent() || !mIsRtl));
1238
1239        boolean shouldScrollOverlay = mLauncherOverlay != null &&
1240                ((amount <= 0 && !mIsRtl) || (amount >= 0 && mIsRtl));
1241
1242        boolean shouldZeroOverlay = mLauncherOverlay != null && mLastOverlaySroll != 0 &&
1243                ((amount >= 0 && !mIsRtl) || (amount <= 0 && mIsRtl));
1244
1245        if (shouldScrollOverlay) {
1246            if (!mStartedSendingScrollEvents && mScrollInteractionBegan) {
1247                mStartedSendingScrollEvents = true;
1248                mLauncherOverlay.onScrollInteractionBegin();
1249                mShouldSendPageSettled = true;
1250            }
1251            int screenSize = getViewportWidth();
1252            float f = (amount / screenSize);
1253
1254            int progress = (int) Math.abs((f * 100));
1255
1256            mLastOverlaySroll = progress;
1257            mLauncherOverlay.onScrollChange(progress, mIsRtl);
1258        } else if (shouldOverScroll) {
1259            dampedOverScroll(amount);
1260        }
1261
1262        if (shouldZeroOverlay) {
1263            mLauncherOverlay.onScrollChange(0, mIsRtl);
1264        }
1265    }
1266
1267    @Override
1268    protected void getEdgeVerticalPostion(int[] pos) {
1269        View child = getChildAt(getPageCount() - 1);
1270        pos[0] = child.getTop();
1271        pos[1] = child.getBottom();
1272    }
1273
1274    @Override
1275    protected void notifyPageSwitchListener() {
1276        super.notifyPageSwitchListener();
1277
1278        if (hasCustomContent() && getNextPage() == 0 && !mCustomContentShowing) {
1279            mCustomContentShowing = true;
1280            if (mCustomContentCallbacks != null) {
1281                mCustomContentCallbacks.onShow(false);
1282                mCustomContentShowTime = System.currentTimeMillis();
1283            }
1284        } else if (hasCustomContent() && getNextPage() != 0 && mCustomContentShowing) {
1285            mCustomContentShowing = false;
1286            if (mCustomContentCallbacks != null) {
1287                mCustomContentCallbacks.onHide();
1288            }
1289        }
1290    }
1291
1292    protected CustomContentCallbacks getCustomContentCallbacks() {
1293        return mCustomContentCallbacks;
1294    }
1295
1296    protected void setWallpaperDimension() {
1297        new AsyncTask<Void, Void, Void>() {
1298            public Void doInBackground(Void ... args) {
1299                String spKey = LauncherFiles.WALLPAPER_CROP_PREFERENCES_KEY;
1300                SharedPreferences sp =
1301                        mLauncher.getSharedPreferences(spKey, Context.MODE_MULTI_PROCESS);
1302                WallpaperUtils.suggestWallpaperDimension(mLauncher.getResources(),
1303                        sp, mLauncher.getWindowManager(), mWallpaperManager,
1304                        mLauncher.overrideWallpaperDimensions());
1305                return null;
1306            }
1307        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void) null);
1308    }
1309
1310    protected void snapToPage(int whichPage, Runnable r) {
1311        snapToPage(whichPage, SLOW_PAGE_SNAP_ANIMATION_DURATION, r);
1312    }
1313
1314    protected void snapToPage(int whichPage, int duration, Runnable r) {
1315        if (mDelayedSnapToPageRunnable != null) {
1316            mDelayedSnapToPageRunnable.run();
1317        }
1318        mDelayedSnapToPageRunnable = r;
1319        snapToPage(whichPage, duration);
1320    }
1321
1322    public void snapToScreenId(long screenId) {
1323        snapToScreenId(screenId, null);
1324    }
1325
1326    protected void snapToScreenId(long screenId, Runnable r) {
1327        snapToPage(getPageIndexForScreenId(screenId), r);
1328    }
1329
1330    class WallpaperOffsetInterpolator implements Choreographer.FrameCallback {
1331        float mFinalOffset = 0.0f;
1332        float mCurrentOffset = 0.5f; // to force an initial update
1333        boolean mWaitingForUpdate;
1334        Choreographer mChoreographer;
1335        Interpolator mInterpolator;
1336        boolean mAnimating;
1337        long mAnimationStartTime;
1338        float mAnimationStartOffset;
1339        private final int ANIMATION_DURATION = 250;
1340        // Don't use all the wallpaper for parallax until you have at least this many pages
1341        private final int MIN_PARALLAX_PAGE_SPAN = 3;
1342        int mNumScreens;
1343
1344        public WallpaperOffsetInterpolator() {
1345            mChoreographer = Choreographer.getInstance();
1346            mInterpolator = new DecelerateInterpolator(1.5f);
1347        }
1348
1349        @Override
1350        public void doFrame(long frameTimeNanos) {
1351            updateOffset(false);
1352        }
1353
1354        private void updateOffset(boolean force) {
1355            if (mWaitingForUpdate || force) {
1356                mWaitingForUpdate = false;
1357                if (computeScrollOffset() && mWindowToken != null) {
1358                    try {
1359                        mWallpaperManager.setWallpaperOffsets(mWindowToken,
1360                                mWallpaperOffset.getCurrX(), 0.5f);
1361                        setWallpaperOffsetSteps();
1362                    } catch (IllegalArgumentException e) {
1363                        Log.e(TAG, "Error updating wallpaper offset: " + e);
1364                    }
1365                }
1366            }
1367        }
1368
1369        public boolean computeScrollOffset() {
1370            final float oldOffset = mCurrentOffset;
1371            if (mAnimating) {
1372                long durationSinceAnimation = System.currentTimeMillis() - mAnimationStartTime;
1373                float t0 = durationSinceAnimation / (float) ANIMATION_DURATION;
1374                float t1 = mInterpolator.getInterpolation(t0);
1375                mCurrentOffset = mAnimationStartOffset +
1376                        (mFinalOffset - mAnimationStartOffset) * t1;
1377                mAnimating = durationSinceAnimation < ANIMATION_DURATION;
1378            } else {
1379                mCurrentOffset = mFinalOffset;
1380            }
1381
1382            if (Math.abs(mCurrentOffset - mFinalOffset) > 0.0000001f) {
1383                scheduleUpdate();
1384            }
1385            if (Math.abs(oldOffset - mCurrentOffset) > 0.0000001f) {
1386                return true;
1387            }
1388            return false;
1389        }
1390
1391        private float wallpaperOffsetForCurrentScroll() {
1392            // TODO: do different behavior if it's  a live wallpaper?
1393            // Don't use up all the wallpaper parallax until you have at least
1394            // MIN_PARALLAX_PAGE_SPAN pages
1395            int numScrollingPages = getNumScreensExcludingEmptyAndCustom();
1396            int parallaxPageSpan;
1397            if (mWallpaperIsLiveWallpaper) {
1398                parallaxPageSpan = numScrollingPages - 1;
1399            } else {
1400                parallaxPageSpan = Math.max(MIN_PARALLAX_PAGE_SPAN, numScrollingPages - 1);
1401            }
1402            mNumPagesForWallpaperParallax = parallaxPageSpan;
1403
1404            if (getChildCount() <= 1) {
1405                if (mIsRtl) {
1406                    return 1 - 1.0f/mNumPagesForWallpaperParallax;
1407                }
1408                return 0;
1409            }
1410
1411            // Exclude the leftmost page
1412            int emptyExtraPages = numEmptyScreensToIgnore();
1413            int firstIndex = numCustomPages();
1414            // Exclude the last extra empty screen (if we have > MIN_PARALLAX_PAGE_SPAN pages)
1415            int lastIndex = getChildCount() - 1 - emptyExtraPages;
1416            if (mIsRtl) {
1417                int temp = firstIndex;
1418                firstIndex = lastIndex;
1419                lastIndex = temp;
1420            }
1421
1422            int firstPageScrollX = getScrollForPage(firstIndex);
1423            int scrollRange = getScrollForPage(lastIndex) - firstPageScrollX;
1424            if (scrollRange == 0) {
1425                return 0;
1426            } else {
1427                // Sometimes the left parameter of the pages is animated during a layout transition;
1428                // this parameter offsets it to keep the wallpaper from animating as well
1429                int adjustedScroll =
1430                        getScrollX() - firstPageScrollX - getLayoutTransitionOffsetForPage(0);
1431                float offset = Math.min(1, adjustedScroll / (float) scrollRange);
1432                offset = Math.max(0, offset);
1433
1434                // On RTL devices, push the wallpaper offset to the right if we don't have enough
1435                // pages (ie if numScrollingPages < MIN_PARALLAX_PAGE_SPAN)
1436                if (!mWallpaperIsLiveWallpaper && numScrollingPages < MIN_PARALLAX_PAGE_SPAN
1437                        && mIsRtl) {
1438                    return offset * (parallaxPageSpan - numScrollingPages + 1) / parallaxPageSpan;
1439                }
1440                return offset * (numScrollingPages - 1) / parallaxPageSpan;
1441            }
1442        }
1443
1444        private int numEmptyScreensToIgnore() {
1445            int numScrollingPages = getChildCount() - numCustomPages();
1446            if (numScrollingPages >= MIN_PARALLAX_PAGE_SPAN && hasExtraEmptyScreen()) {
1447                return 1;
1448            } else {
1449                return 0;
1450            }
1451        }
1452
1453        private int getNumScreensExcludingEmptyAndCustom() {
1454            int numScrollingPages = getChildCount() - numEmptyScreensToIgnore() - numCustomPages();
1455            return numScrollingPages;
1456        }
1457
1458        public void syncWithScroll() {
1459            float offset = wallpaperOffsetForCurrentScroll();
1460            mWallpaperOffset.setFinalX(offset);
1461            updateOffset(true);
1462        }
1463
1464        public float getCurrX() {
1465            return mCurrentOffset;
1466        }
1467
1468        public float getFinalX() {
1469            return mFinalOffset;
1470        }
1471
1472        private void animateToFinal() {
1473            mAnimating = true;
1474            mAnimationStartOffset = mCurrentOffset;
1475            mAnimationStartTime = System.currentTimeMillis();
1476        }
1477
1478        private void setWallpaperOffsetSteps() {
1479            // Set wallpaper offset steps (1 / (number of screens - 1))
1480            float xOffset = 1.0f / mNumPagesForWallpaperParallax;
1481            if (xOffset != mLastSetWallpaperOffsetSteps) {
1482                mWallpaperManager.setWallpaperOffsetSteps(xOffset, 1.0f);
1483                mLastSetWallpaperOffsetSteps = xOffset;
1484            }
1485        }
1486
1487        public void setFinalX(float x) {
1488            scheduleUpdate();
1489            mFinalOffset = Math.max(0f, Math.min(x, 1.0f));
1490            if (getNumScreensExcludingEmptyAndCustom() != mNumScreens) {
1491                if (mNumScreens > 0) {
1492                    // Don't animate if we're going from 0 screens
1493                    animateToFinal();
1494                }
1495                mNumScreens = getNumScreensExcludingEmptyAndCustom();
1496            }
1497        }
1498
1499        private void scheduleUpdate() {
1500            if (!mWaitingForUpdate) {
1501                mChoreographer.postFrameCallback(this);
1502                mWaitingForUpdate = true;
1503            }
1504        }
1505
1506        public void jumpToFinal() {
1507            mCurrentOffset = mFinalOffset;
1508        }
1509    }
1510
1511    @Override
1512    public void computeScroll() {
1513        super.computeScroll();
1514        mWallpaperOffset.syncWithScroll();
1515    }
1516
1517    @Override
1518    public void announceForAccessibility(CharSequence text) {
1519        // Don't announce if apps is on top of us.
1520        if (!mLauncher.isAppsViewVisible()) {
1521            super.announceForAccessibility(text);
1522        }
1523    }
1524
1525    public void showOutlinesTemporarily() {
1526        if (!mIsPageMoving && !isTouchActive()) {
1527            snapToPage(mCurrentPage);
1528        }
1529    }
1530
1531    float backgroundAlphaInterpolator(float r) {
1532        float pivotA = 0.1f;
1533        float pivotB = 0.4f;
1534        if (r < pivotA) {
1535            return 0;
1536        } else if (r > pivotB) {
1537            return 1.0f;
1538        } else {
1539            return (r - pivotA)/(pivotB - pivotA);
1540        }
1541    }
1542
1543    private void updatePageAlphaValues(int screenCenter) {
1544        if (mWorkspaceFadeInAdjacentScreens &&
1545                !workspaceInModalState() &&
1546                !mIsSwitchingState) {
1547            for (int i = numCustomPages(); i < getChildCount(); i++) {
1548                CellLayout child = (CellLayout) getChildAt(i);
1549                if (child != null) {
1550                    float scrollProgress = getScrollProgress(screenCenter, child, i);
1551                    float alpha = 1 - Math.abs(scrollProgress);
1552                    child.getShortcutsAndWidgets().setAlpha(alpha);
1553                }
1554            }
1555        }
1556    }
1557
1558    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
1559    @Override
1560    public void enableAccessibleDrag(boolean enable) {
1561        for (int i = 0; i < getChildCount(); i++) {
1562            CellLayout child = (CellLayout) getChildAt(i);
1563            child.enableAccessibleDrag(enable, CellLayout.WORKSPACE_ACCESSIBILITY_DRAG);
1564        }
1565
1566        if (enable) {
1567            // We need to allow our individual children to become click handlers in this case
1568            setOnClickListener(null);
1569        } else {
1570            // Reset our click listener
1571            setOnClickListener(mLauncher);
1572        }
1573        mLauncher.getSearchBar().enableAccessibleDrag(enable);
1574        mLauncher.getHotseat().getLayout()
1575            .enableAccessibleDrag(enable, CellLayout.WORKSPACE_ACCESSIBILITY_DRAG);
1576    }
1577
1578    public boolean hasCustomContent() {
1579        return (mScreenOrder.size() > 0 && mScreenOrder.get(0) == CUSTOM_CONTENT_SCREEN_ID);
1580    }
1581
1582    public int numCustomPages() {
1583        return hasCustomContent() ? 1 : 0;
1584    }
1585
1586    public boolean isOnOrMovingToCustomContent() {
1587        return hasCustomContent() && getNextPage() == 0;
1588    }
1589
1590    private void updateStateForCustomContent(int screenCenter) {
1591        float translationX = 0;
1592        float progress = 0;
1593        if (hasCustomContent()) {
1594            int index = mScreenOrder.indexOf(CUSTOM_CONTENT_SCREEN_ID);
1595
1596            int scrollDelta = getScrollX() - getScrollForPage(index) -
1597                    getLayoutTransitionOffsetForPage(index);
1598            float scrollRange = getScrollForPage(index + 1) - getScrollForPage(index);
1599            translationX = scrollRange - scrollDelta;
1600            progress = (scrollRange - scrollDelta) / scrollRange;
1601
1602            if (mIsRtl) {
1603                translationX = Math.min(0, translationX);
1604            } else {
1605                translationX = Math.max(0, translationX);
1606            }
1607            progress = Math.max(0, progress);
1608        }
1609
1610        if (Float.compare(progress, mLastCustomContentScrollProgress) == 0) return;
1611
1612        CellLayout cc = mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID);
1613        if (progress > 0 && cc.getVisibility() != VISIBLE && !workspaceInModalState()) {
1614            cc.setVisibility(VISIBLE);
1615        }
1616
1617        mLastCustomContentScrollProgress = progress;
1618
1619        // We should only update the drag layer background alpha if we are not in all apps or the
1620        // widgets tray
1621        if (mState == State.NORMAL) {
1622            mLauncher.getDragLayer().setBackgroundAlpha(progress == 1 ? 0 : progress * 0.8f);
1623        }
1624
1625        if (mLauncher.getHotseat() != null) {
1626            mLauncher.getHotseat().setTranslationX(translationX);
1627        }
1628
1629        if (getPageIndicator() != null) {
1630            getPageIndicator().setTranslationX(translationX);
1631        }
1632
1633        if (mCustomContentCallbacks != null) {
1634            mCustomContentCallbacks.onScrollProgressChanged(progress);
1635        }
1636    }
1637
1638    @Override
1639    protected OnClickListener getPageIndicatorClickListener() {
1640        AccessibilityManager am = (AccessibilityManager)
1641                getContext().getSystemService(Context.ACCESSIBILITY_SERVICE);
1642        if (!am.isTouchExplorationEnabled()) {
1643            return null;
1644        }
1645        OnClickListener listener = new OnClickListener() {
1646            @Override
1647            public void onClick(View arg0) {
1648                mLauncher.showOverviewMode(true);
1649            }
1650        };
1651        return listener;
1652    }
1653
1654    @Override
1655    protected void screenScrolled(int screenCenter) {
1656        updatePageAlphaValues(screenCenter);
1657        updateStateForCustomContent(screenCenter);
1658        enableHwLayersOnVisiblePages();
1659    }
1660
1661    protected void onAttachedToWindow() {
1662        super.onAttachedToWindow();
1663        mWindowToken = getWindowToken();
1664        computeScroll();
1665        mDragController.setWindowToken(mWindowToken);
1666    }
1667
1668    protected void onDetachedFromWindow() {
1669        super.onDetachedFromWindow();
1670        mWindowToken = null;
1671    }
1672
1673    protected void onResume() {
1674        if (getPageIndicator() != null) {
1675            // In case accessibility state has changed, we need to perform this on every
1676            // attach to window
1677            OnClickListener listener = getPageIndicatorClickListener();
1678            if (listener != null) {
1679                getPageIndicator().setOnClickListener(listener);
1680            }
1681        }
1682
1683        // Update wallpaper dimensions if they were changed since last onResume
1684        // (we also always set the wallpaper dimensions in the constructor)
1685        if (LauncherAppState.getInstance().hasWallpaperChangedSinceLastCheck()) {
1686            setWallpaperDimension();
1687        }
1688        mWallpaperIsLiveWallpaper = mWallpaperManager.getWallpaperInfo() != null;
1689        // Force the wallpaper offset steps to be set again, because another app might have changed
1690        // them
1691        mLastSetWallpaperOffsetSteps = 0f;
1692    }
1693
1694    @Override
1695    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
1696        if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) {
1697            mWallpaperOffset.syncWithScroll();
1698            mWallpaperOffset.jumpToFinal();
1699        }
1700        super.onLayout(changed, left, top, right, bottom);
1701    }
1702
1703    @Override
1704    protected void onDraw(Canvas canvas) {
1705        super.onDraw(canvas);
1706
1707        // Call back to LauncherModel to finish binding after the first draw
1708        post(mBindPages);
1709    }
1710
1711    @Override
1712    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
1713        if (!mLauncher.isAppsViewVisible()) {
1714            final Folder openFolder = getOpenFolder();
1715            if (openFolder != null) {
1716                return openFolder.requestFocus(direction, previouslyFocusedRect);
1717            } else {
1718                return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
1719            }
1720        }
1721        return false;
1722    }
1723
1724    @Override
1725    public int getDescendantFocusability() {
1726        if (workspaceInModalState()) {
1727            return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
1728        }
1729        return super.getDescendantFocusability();
1730    }
1731
1732    @Override
1733    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
1734        if (!mLauncher.isAppsViewVisible()) {
1735            final Folder openFolder = getOpenFolder();
1736            if (openFolder != null) {
1737                openFolder.addFocusables(views, direction);
1738            } else {
1739                super.addFocusables(views, direction, focusableMode);
1740            }
1741        }
1742    }
1743
1744    public boolean workspaceInModalState() {
1745        return mState != State.NORMAL;
1746    }
1747
1748    void enableChildrenCache(int fromPage, int toPage) {
1749        if (fromPage > toPage) {
1750            final int temp = fromPage;
1751            fromPage = toPage;
1752            toPage = temp;
1753        }
1754
1755        final int screenCount = getChildCount();
1756
1757        fromPage = Math.max(fromPage, 0);
1758        toPage = Math.min(toPage, screenCount - 1);
1759
1760        for (int i = fromPage; i <= toPage; i++) {
1761            final CellLayout layout = (CellLayout) getChildAt(i);
1762            layout.setChildrenDrawnWithCacheEnabled(true);
1763            layout.setChildrenDrawingCacheEnabled(true);
1764        }
1765    }
1766
1767    void clearChildrenCache() {
1768        final int screenCount = getChildCount();
1769        for (int i = 0; i < screenCount; i++) {
1770            final CellLayout layout = (CellLayout) getChildAt(i);
1771            layout.setChildrenDrawnWithCacheEnabled(false);
1772            // In software mode, we don't want the items to continue to be drawn into bitmaps
1773            if (!isHardwareAccelerated()) {
1774                layout.setChildrenDrawingCacheEnabled(false);
1775            }
1776        }
1777    }
1778
1779    @Thunk void updateChildrenLayersEnabled(boolean force) {
1780        boolean small = mState == State.OVERVIEW || mIsSwitchingState;
1781        boolean enableChildrenLayers = force || small || mAnimatingViewIntoPlace || isPageMoving();
1782
1783        if (enableChildrenLayers != mChildrenLayersEnabled) {
1784            mChildrenLayersEnabled = enableChildrenLayers;
1785            if (mChildrenLayersEnabled) {
1786                enableHwLayersOnVisiblePages();
1787            } else {
1788                for (int i = 0; i < getPageCount(); i++) {
1789                    final CellLayout cl = (CellLayout) getChildAt(i);
1790                    cl.enableHardwareLayer(false);
1791                }
1792            }
1793        }
1794    }
1795
1796    private void enableHwLayersOnVisiblePages() {
1797        if (mChildrenLayersEnabled) {
1798            final int screenCount = getChildCount();
1799            getVisiblePages(mTempVisiblePagesRange);
1800            int leftScreen = mTempVisiblePagesRange[0];
1801            int rightScreen = mTempVisiblePagesRange[1];
1802            if (leftScreen == rightScreen) {
1803                // make sure we're caching at least two pages always
1804                if (rightScreen < screenCount - 1) {
1805                    rightScreen++;
1806                } else if (leftScreen > 0) {
1807                    leftScreen--;
1808                }
1809            }
1810
1811            final CellLayout customScreen = mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID);
1812            for (int i = 0; i < screenCount; i++) {
1813                final CellLayout layout = (CellLayout) getPageAt(i);
1814
1815                // enable layers between left and right screen inclusive, except for the
1816                // customScreen, which may animate its content during transitions.
1817                boolean enableLayer = layout != customScreen &&
1818                        leftScreen <= i && i <= rightScreen && shouldDrawChild(layout);
1819                layout.enableHardwareLayer(enableLayer);
1820            }
1821        }
1822    }
1823
1824    public void buildPageHardwareLayers() {
1825        // force layers to be enabled just for the call to buildLayer
1826        updateChildrenLayersEnabled(true);
1827        if (getWindowToken() != null) {
1828            final int childCount = getChildCount();
1829            for (int i = 0; i < childCount; i++) {
1830                CellLayout cl = (CellLayout) getChildAt(i);
1831                cl.buildHardwareLayer();
1832            }
1833        }
1834        updateChildrenLayersEnabled(false);
1835    }
1836
1837    protected void onWallpaperTap(MotionEvent ev) {
1838        final int[] position = mTempCell;
1839        getLocationOnScreen(position);
1840
1841        int pointerIndex = ev.getActionIndex();
1842        position[0] += (int) ev.getX(pointerIndex);
1843        position[1] += (int) ev.getY(pointerIndex);
1844
1845        mWallpaperManager.sendWallpaperCommand(getWindowToken(),
1846                ev.getAction() == MotionEvent.ACTION_UP
1847                        ? WallpaperManager.COMMAND_TAP : WallpaperManager.COMMAND_SECONDARY_TAP,
1848                position[0], position[1], 0, null);
1849    }
1850
1851    /*
1852    *
1853    * We call these methods (onDragStartedWithItemSpans/onDragStartedWithSize) whenever we
1854    * start a drag in Launcher, regardless of whether the drag has ever entered the Workspace
1855    *
1856    * These methods mark the appropriate pages as accepting drops (which alters their visual
1857    * appearance).
1858    *
1859    */
1860    private static Rect getDrawableBounds(Drawable d) {
1861        Rect bounds = new Rect();
1862        d.copyBounds(bounds);
1863        if (bounds.width() == 0 || bounds.height() == 0) {
1864            bounds.set(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
1865        } else {
1866            bounds.offsetTo(0, 0);
1867        }
1868        if (d instanceof PreloadIconDrawable) {
1869            int inset = -((PreloadIconDrawable) d).getOutset();
1870            bounds.inset(inset, inset);
1871        }
1872        return bounds;
1873    }
1874
1875    public void onExternalDragStartedWithItem(View v) {
1876        // Compose a drag bitmap with the view scaled to the icon size
1877        DeviceProfile grid = mLauncher.getDeviceProfile();
1878        int iconSize = grid.iconSizePx;
1879        int bmpWidth = v.getMeasuredWidth();
1880        int bmpHeight = v.getMeasuredHeight();
1881
1882        // If this is a text view, use its drawable instead
1883        if (v instanceof TextView) {
1884            Drawable d = getTextViewIcon((TextView) v);
1885            Rect bounds = getDrawableBounds(d);
1886            bmpWidth = bounds.width();
1887            bmpHeight = bounds.height();
1888        }
1889
1890        // Compose the bitmap to create the icon from
1891        Bitmap b = Bitmap.createBitmap(bmpWidth, bmpHeight,
1892                Bitmap.Config.ARGB_8888);
1893        mCanvas.setBitmap(b);
1894        drawDragView(v, mCanvas, 0);
1895        mCanvas.setBitmap(null);
1896
1897        // The outline is used to visualize where the item will land if dropped
1898        mDragOutline = createDragOutline(b, DRAG_BITMAP_PADDING, iconSize, iconSize, true);
1899    }
1900
1901    public void onDragStartedWithItem(PendingAddItemInfo info, Bitmap b, boolean clipAlpha) {
1902        int[] size = estimateItemSize(info, false);
1903
1904        // The outline is used to visualize where the item will land if dropped
1905        mDragOutline = createDragOutline(b, DRAG_BITMAP_PADDING, size[0], size[1], clipAlpha);
1906    }
1907
1908    public void exitWidgetResizeMode() {
1909        DragLayer dragLayer = mLauncher.getDragLayer();
1910        dragLayer.clearAllResizeFrames();
1911    }
1912
1913    @Override
1914    protected void getFreeScrollPageRange(int[] range) {
1915        getOverviewModePages(range);
1916    }
1917
1918    private void getOverviewModePages(int[] range) {
1919        int start = numCustomPages();
1920        int end = getChildCount() - 1;
1921
1922        range[0] = Math.max(0, Math.min(start, getChildCount() - 1));
1923        range[1] = Math.max(0,  end);
1924    }
1925
1926    public void onStartReordering() {
1927        super.onStartReordering();
1928        // Reordering handles its own animations, disable the automatic ones.
1929        disableLayoutTransitions();
1930    }
1931
1932    public void onEndReordering() {
1933        super.onEndReordering();
1934
1935        if (mLauncher.isWorkspaceLoading()) {
1936            // Invalid and dangerous operation if workspace is loading
1937            return;
1938        }
1939
1940        mScreenOrder.clear();
1941        int count = getChildCount();
1942        for (int i = 0; i < count; i++) {
1943            CellLayout cl = ((CellLayout) getChildAt(i));
1944            mScreenOrder.add(getIdForScreen(cl));
1945        }
1946
1947        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
1948
1949        // Re-enable auto layout transitions for page deletion.
1950        enableLayoutTransitions();
1951    }
1952
1953    public boolean isInOverviewMode() {
1954        return mState == State.OVERVIEW;
1955    }
1956
1957    int getOverviewModeTranslationY() {
1958        DeviceProfile grid = mLauncher.getDeviceProfile();
1959        Rect overviewBar = grid.getOverviewModeButtonBarRect();
1960
1961        int availableHeight = getViewportHeight();
1962        int scaledHeight = (int) (mOverviewModeShrinkFactor * getNormalChildHeight());
1963        int offsetFromTopEdge = (availableHeight - scaledHeight) / 2;
1964        int offsetToCenterInOverview = (availableHeight - mInsets.top - overviewBar.height()
1965                - scaledHeight) / 2;
1966
1967        return -offsetFromTopEdge + mInsets.top + offsetToCenterInOverview;
1968    }
1969
1970    /**
1971     * Sets the current workspace {@link State}, returning an animation transitioning the workspace
1972     * to that new state.
1973     */
1974    public Animator setStateWithAnimation(State toState, int toPage, boolean animated,
1975            boolean hasOverlaySearchBar, HashMap<View, Integer> layerViews) {
1976        // Create the animation to the new state
1977        Animator workspaceAnim =  mStateTransitionAnimation.getAnimationToState(mState,
1978                toState, toPage, animated, hasOverlaySearchBar, layerViews);
1979
1980        // Update the current state
1981        mState = toState;
1982        updateAccessibilityFlags();
1983
1984        return workspaceAnim;
1985    }
1986
1987    State getState() {
1988        return mState;
1989    }
1990
1991    public void updateAccessibilityFlags() {
1992        if (Utilities.isLmpOrAbove()) {
1993            int total = getPageCount();
1994            for (int i = numCustomPages(); i < total; i++) {
1995                updateAccessibilityFlags((CellLayout) getPageAt(i), i);
1996            }
1997            setImportantForAccessibility((mState == State.NORMAL || mState == State.OVERVIEW)
1998                    ? IMPORTANT_FOR_ACCESSIBILITY_AUTO
1999                            : IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
2000        } else {
2001            int accessible = mState == State.NORMAL ?
2002                    IMPORTANT_FOR_ACCESSIBILITY_AUTO :
2003                        IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS;
2004            setImportantForAccessibility(accessible);
2005        }
2006    }
2007
2008    private void updateAccessibilityFlags(CellLayout page, int pageNo) {
2009        if (mState == State.OVERVIEW) {
2010            page.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_YES);
2011            page.getShortcutsAndWidgets().setImportantForAccessibility(
2012                    IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
2013            page.setContentDescription(getPageDescription(pageNo));
2014
2015            if (mPagesAccessibilityDelegate == null) {
2016                mPagesAccessibilityDelegate = new OverviewScreenAccessibilityDelegate(this);
2017            }
2018            page.setAccessibilityDelegate(mPagesAccessibilityDelegate);
2019        } else {
2020            int accessible = mState == State.NORMAL ?
2021                    IMPORTANT_FOR_ACCESSIBILITY_AUTO :
2022                        IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS;
2023            page.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
2024            page.getShortcutsAndWidgets().setImportantForAccessibility(accessible);
2025            page.setContentDescription(null);
2026            page.setAccessibilityDelegate(null);
2027        }
2028    }
2029
2030    @Override
2031    public void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace) {
2032        mIsSwitchingState = true;
2033
2034        // Invalidate here to ensure that the pages are rendered during the state change transition.
2035        invalidate();
2036
2037        updateChildrenLayersEnabled(false);
2038        hideCustomContentIfNecessary();
2039    }
2040
2041    @Override
2042    public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) {
2043    }
2044
2045    @Override
2046    public void onLauncherTransitionStep(Launcher l, float t) {
2047        mTransitionProgress = t;
2048    }
2049
2050    @Override
2051    public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
2052        mIsSwitchingState = false;
2053        updateChildrenLayersEnabled(false);
2054        showCustomContentIfNecessary();
2055    }
2056
2057    void updateCustomContentVisibility() {
2058        int visibility = mState == Workspace.State.NORMAL ? VISIBLE : INVISIBLE;
2059        if (hasCustomContent()) {
2060            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(visibility);
2061        }
2062    }
2063
2064    void showCustomContentIfNecessary() {
2065        boolean show  = mState == Workspace.State.NORMAL;
2066        if (show && hasCustomContent()) {
2067            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(VISIBLE);
2068        }
2069    }
2070
2071    void hideCustomContentIfNecessary() {
2072        boolean hide  = mState != Workspace.State.NORMAL;
2073        if (hide && hasCustomContent()) {
2074            disableLayoutTransitions();
2075            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(INVISIBLE);
2076            enableLayoutTransitions();
2077        }
2078    }
2079
2080    /**
2081     * Returns the drawable for the given text view.
2082     */
2083    public static Drawable getTextViewIcon(TextView tv) {
2084        final Drawable[] drawables = tv.getCompoundDrawables();
2085        for (int i = 0; i < drawables.length; i++) {
2086            if (drawables[i] != null) {
2087                return drawables[i];
2088            }
2089        }
2090        return null;
2091    }
2092
2093    /**
2094     * Draw the View v into the given Canvas.
2095     *
2096     * @param v the view to draw
2097     * @param destCanvas the canvas to draw on
2098     * @param padding the horizontal and vertical padding to use when drawing
2099     */
2100    private static void drawDragView(View v, Canvas destCanvas, int padding) {
2101        final Rect clipRect = sTempRect;
2102        v.getDrawingRect(clipRect);
2103
2104        boolean textVisible = false;
2105
2106        destCanvas.save();
2107        if (v instanceof TextView) {
2108            Drawable d = getTextViewIcon((TextView) v);
2109            Rect bounds = getDrawableBounds(d);
2110            clipRect.set(0, 0, bounds.width() + padding, bounds.height() + padding);
2111            destCanvas.translate(padding / 2 - bounds.left, padding / 2 - bounds.top);
2112            d.draw(destCanvas);
2113        } else {
2114            if (v instanceof FolderIcon) {
2115                // For FolderIcons the text can bleed into the icon area, and so we need to
2116                // hide the text completely (which can't be achieved by clipping).
2117                if (((FolderIcon) v).getTextVisible()) {
2118                    ((FolderIcon) v).setTextVisible(false);
2119                    textVisible = true;
2120                }
2121            }
2122            destCanvas.translate(-v.getScrollX() + padding / 2, -v.getScrollY() + padding / 2);
2123            destCanvas.clipRect(clipRect, Op.REPLACE);
2124            v.draw(destCanvas);
2125
2126            // Restore text visibility of FolderIcon if necessary
2127            if (textVisible) {
2128                ((FolderIcon) v).setTextVisible(true);
2129            }
2130        }
2131        destCanvas.restore();
2132    }
2133
2134    /**
2135     * Returns a new bitmap to show when the given View is being dragged around.
2136     * Responsibility for the bitmap is transferred to the caller.
2137     * @param expectedPadding padding to add to the drag view. If a different padding was used
2138     * its value will be changed
2139     */
2140    public Bitmap createDragBitmap(View v, AtomicInteger expectedPadding) {
2141        Bitmap b;
2142
2143        int padding = expectedPadding.get();
2144        if (v instanceof TextView) {
2145            Drawable d = getTextViewIcon((TextView) v);
2146            Rect bounds = getDrawableBounds(d);
2147            b = Bitmap.createBitmap(bounds.width() + padding,
2148                    bounds.height() + padding, Bitmap.Config.ARGB_8888);
2149            expectedPadding.set(padding - bounds.left - bounds.top);
2150        } else {
2151            b = Bitmap.createBitmap(
2152                    v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2153        }
2154
2155        mCanvas.setBitmap(b);
2156        drawDragView(v, mCanvas, padding);
2157        mCanvas.setBitmap(null);
2158
2159        return b;
2160    }
2161
2162    /**
2163     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2164     * Responsibility for the bitmap is transferred to the caller.
2165     */
2166    private Bitmap createDragOutline(View v, int padding) {
2167        final int outlineColor = getResources().getColor(R.color.outline_color);
2168        final Bitmap b = Bitmap.createBitmap(
2169                v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2170
2171        mCanvas.setBitmap(b);
2172        drawDragView(v, mCanvas, padding);
2173        mOutlineHelper.applyExpensiveOutlineWithBlur(b, mCanvas, outlineColor, outlineColor);
2174        mCanvas.setBitmap(null);
2175        return b;
2176    }
2177
2178    /**
2179     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2180     * Responsibility for the bitmap is transferred to the caller.
2181     */
2182    private Bitmap createDragOutline(Bitmap orig, int padding, int w, int h,
2183            boolean clipAlpha) {
2184        final int outlineColor = getResources().getColor(R.color.outline_color);
2185        final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
2186        mCanvas.setBitmap(b);
2187
2188        Rect src = new Rect(0, 0, orig.getWidth(), orig.getHeight());
2189        float scaleFactor = Math.min((w - padding) / (float) orig.getWidth(),
2190                (h - padding) / (float) orig.getHeight());
2191        int scaledWidth = (int) (scaleFactor * orig.getWidth());
2192        int scaledHeight = (int) (scaleFactor * orig.getHeight());
2193        Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);
2194
2195        // center the image
2196        dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);
2197
2198        mCanvas.drawBitmap(orig, src, dst, null);
2199        mOutlineHelper.applyExpensiveOutlineWithBlur(b, mCanvas, outlineColor, outlineColor,
2200                clipAlpha);
2201        mCanvas.setBitmap(null);
2202
2203        return b;
2204    }
2205
2206    public void startDrag(CellLayout.CellInfo cellInfo) {
2207        startDrag(cellInfo, false);
2208    }
2209
2210    @Override
2211    public void startDrag(CellLayout.CellInfo cellInfo, boolean accessible) {
2212        View child = cellInfo.cell;
2213
2214        // Make sure the drag was started by a long press as opposed to a long click.
2215        if (!child.isInTouchMode()) {
2216            return;
2217        }
2218
2219        mDragInfo = cellInfo;
2220        child.setVisibility(INVISIBLE);
2221        CellLayout layout = (CellLayout) child.getParent().getParent();
2222        layout.prepareChildForDrag(child);
2223
2224        beginDragShared(child, this, accessible);
2225    }
2226
2227    public void beginDragShared(View child, DragSource source, boolean accessible) {
2228        beginDragShared(child, new Point(), source, accessible);
2229    }
2230
2231    public void beginDragShared(View child, Point relativeTouchPos, DragSource source,
2232            boolean accessible) {
2233        child.clearFocus();
2234        child.setPressed(false);
2235
2236        // The outline is used to visualize where the item will land if dropped
2237        mDragOutline = createDragOutline(child, DRAG_BITMAP_PADDING);
2238
2239        mLauncher.onDragStarted(child);
2240        // The drag bitmap follows the touch point around on the screen
2241        AtomicInteger padding = new AtomicInteger(DRAG_BITMAP_PADDING);
2242        final Bitmap b = createDragBitmap(child, padding);
2243
2244        final int bmpWidth = b.getWidth();
2245        final int bmpHeight = b.getHeight();
2246
2247        float scale = mLauncher.getDragLayer().getLocationInDragLayer(child, mTempXY);
2248        int dragLayerX = Math.round(mTempXY[0] - (bmpWidth - scale * child.getWidth()) / 2);
2249        int dragLayerY = Math.round(mTempXY[1] - (bmpHeight - scale * bmpHeight) / 2
2250                        - padding.get() / 2);
2251
2252        DeviceProfile grid = mLauncher.getDeviceProfile();
2253        Point dragVisualizeOffset = null;
2254        Rect dragRect = null;
2255        if (child instanceof BubbleTextView) {
2256            BubbleTextView icon = (BubbleTextView) child;
2257            int iconSize = grid.iconSizePx;
2258            int top = child.getPaddingTop();
2259            int left = (bmpWidth - iconSize) / 2;
2260            int right = left + iconSize;
2261            int bottom = top + iconSize;
2262            if (icon.isLayoutHorizontal()) {
2263                // If the layout is horizontal, then if we are just picking up the icon, then just
2264                // use the child position since the icon is top-left aligned.  Otherwise, offset
2265                // the drag layer position horizontally so that the icon is under the current
2266                // touch position.
2267                if (icon.getIcon().getBounds().contains(relativeTouchPos.x, relativeTouchPos.y)) {
2268                    dragLayerX = Math.round(mTempXY[0]);
2269                } else {
2270                    dragLayerX = Math.round(mTempXY[0] + relativeTouchPos.x - (bmpWidth / 2));
2271                }
2272            }
2273            dragLayerY += top;
2274            // Note: The drag region is used to calculate drag layer offsets, but the
2275            // dragVisualizeOffset in addition to the dragRect (the size) to position the outline.
2276            dragVisualizeOffset = new Point(-padding.get() / 2, padding.get() / 2);
2277            dragRect = new Rect(left, top, right, bottom);
2278        } else if (child instanceof FolderIcon) {
2279            int previewSize = grid.folderIconSizePx;
2280            dragRect = new Rect(0, child.getPaddingTop(), child.getWidth(), previewSize);
2281        }
2282
2283        // Clear the pressed state if necessary
2284        if (child instanceof BubbleTextView) {
2285            BubbleTextView icon = (BubbleTextView) child;
2286            icon.clearPressedBackground();
2287        }
2288
2289        Object dragObject = child.getTag();
2290        if (!(dragObject instanceof ItemInfo)) {
2291            String msg = "Drag started with a view that has no tag set. This "
2292                    + "will cause a crash (issue 11627249) down the line. "
2293                    + "View: " + child + "  tag: " + child.getTag();
2294            throw new IllegalStateException(msg);
2295        }
2296
2297        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source,
2298                (ItemInfo) dragObject, DragController.DRAG_ACTION_MOVE, dragVisualizeOffset,
2299                dragRect, scale, accessible);
2300        dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
2301
2302        if (child.getParent() instanceof ShortcutAndWidgetContainer) {
2303            mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent();
2304        }
2305
2306        b.recycle();
2307    }
2308
2309    public void beginExternalDragShared(View child, DragSource source) {
2310        DeviceProfile grid = mLauncher.getDeviceProfile();
2311        int iconSize = grid.iconSizePx;
2312
2313        // Notify launcher of drag start
2314        mLauncher.onDragStarted(child);
2315
2316        // Compose a new drag bitmap that is of the icon size
2317        AtomicInteger padding = new AtomicInteger(DRAG_BITMAP_PADDING);
2318        final Bitmap tmpB = createDragBitmap(child, padding);
2319        Bitmap b = Bitmap.createBitmap(iconSize, iconSize, Bitmap.Config.ARGB_8888);
2320        Paint p = new Paint();
2321        p.setFilterBitmap(true);
2322        mCanvas.setBitmap(b);
2323        mCanvas.drawBitmap(tmpB, new Rect(0, 0, tmpB.getWidth(), tmpB.getHeight()),
2324                new Rect(0, 0, iconSize, iconSize), p);
2325        mCanvas.setBitmap(null);
2326
2327        // Find the child's location on the screen
2328        int bmpWidth = tmpB.getWidth();
2329        float iconScale = (float) bmpWidth / iconSize;
2330        float scale = mLauncher.getDragLayer().getLocationInDragLayer(child, mTempXY) * iconScale;
2331        int dragLayerX = Math.round(mTempXY[0] - (bmpWidth - scale * child.getWidth()) / 2);
2332        int dragLayerY = Math.round(mTempXY[1]);
2333
2334        // Note: The drag region is used to calculate drag layer offsets, but the
2335        // dragVisualizeOffset in addition to the dragRect (the size) to position the outline.
2336        Point dragVisualizeOffset = new Point(-padding.get() / 2, padding.get() / 2);
2337        Rect dragRect = new Rect(0, 0, iconSize, iconSize);
2338
2339        Object dragObject = child.getTag();
2340        if (!(dragObject instanceof ItemInfo)) {
2341            String msg = "Drag started with a view that has no tag set. This "
2342                    + "will cause a crash (issue 11627249) down the line. "
2343                    + "View: " + child + "  tag: " + child.getTag();
2344            throw new IllegalStateException(msg);
2345        }
2346
2347        // Start the drag
2348        DragView dv = mDragController.startDrag(b, dragLayerX, dragLayerY, source,
2349                (ItemInfo) dragObject, DragController.DRAG_ACTION_MOVE, dragVisualizeOffset,
2350                dragRect, scale, false);
2351        dv.setIntrinsicIconScaleFactor(source.getIntrinsicIconScaleFactor());
2352
2353        // Recycle temporary bitmaps
2354        tmpB.recycle();
2355    }
2356
2357    public boolean transitionStateShouldAllowDrop() {
2358        return ((!isSwitchingState() || mTransitionProgress > 0.5f) &&
2359                (mState == State.NORMAL || mState == State.SPRING_LOADED));
2360    }
2361
2362    /**
2363     * {@inheritDoc}
2364     */
2365    public boolean acceptDrop(DragObject d) {
2366        // If it's an external drop (e.g. from All Apps), check if it should be accepted
2367        CellLayout dropTargetLayout = mDropToLayout;
2368        if (d.dragSource != this) {
2369            // Don't accept the drop if we're not over a screen at time of drop
2370            if (dropTargetLayout == null) {
2371                return false;
2372            }
2373            if (!transitionStateShouldAllowDrop()) return false;
2374
2375            mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
2376
2377            // We want the point to be mapped to the dragTarget.
2378            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2379                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2380            } else {
2381                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2382            }
2383
2384            int spanX = 1;
2385            int spanY = 1;
2386            if (mDragInfo != null) {
2387                final CellLayout.CellInfo dragCellInfo = mDragInfo;
2388                spanX = dragCellInfo.spanX;
2389                spanY = dragCellInfo.spanY;
2390            } else {
2391                spanX = d.dragInfo.spanX;
2392                spanY = d.dragInfo.spanY;
2393            }
2394
2395            int minSpanX = spanX;
2396            int minSpanY = spanY;
2397            if (d.dragInfo instanceof PendingAddWidgetInfo) {
2398                minSpanX = ((PendingAddWidgetInfo) d.dragInfo).minSpanX;
2399                minSpanY = ((PendingAddWidgetInfo) d.dragInfo).minSpanY;
2400            }
2401
2402            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
2403                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, dropTargetLayout,
2404                    mTargetCell);
2405            float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2406                    mDragViewVisualCenter[1], mTargetCell);
2407            if (mCreateUserFolderOnDrop && willCreateUserFolder(d.dragInfo,
2408                    dropTargetLayout, mTargetCell, distance, true)) {
2409                return true;
2410            }
2411
2412            if (mAddToExistingFolderOnDrop && willAddToExistingUserFolder(d.dragInfo,
2413                    dropTargetLayout, mTargetCell, distance)) {
2414                return true;
2415            }
2416
2417            int[] resultSpan = new int[2];
2418            mTargetCell = dropTargetLayout.performReorder((int) mDragViewVisualCenter[0],
2419                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
2420                    null, mTargetCell, resultSpan, CellLayout.MODE_ACCEPT_DROP);
2421            boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2422
2423            // Don't accept the drop if there's no room for the item
2424            if (!foundCell) {
2425                // Don't show the message if we are dropping on the AllApps button and the hotseat
2426                // is full
2427                boolean isHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2428                if (mTargetCell != null && isHotseat) {
2429                    Hotseat hotseat = mLauncher.getHotseat();
2430                    if (hotseat.isAllAppsButtonRank(
2431                            hotseat.getOrderInHotseat(mTargetCell[0], mTargetCell[1]))) {
2432                        return false;
2433                    }
2434                }
2435
2436                mLauncher.showOutOfSpaceMessage(isHotseat);
2437                return false;
2438            }
2439        }
2440
2441        long screenId = getIdForScreen(dropTargetLayout);
2442        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
2443            commitExtraEmptyScreen();
2444        }
2445
2446        return true;
2447    }
2448
2449    boolean willCreateUserFolder(ItemInfo info, CellLayout target, int[] targetCell, float
2450            distance, boolean considerTimeout) {
2451        if (distance > mMaxDistanceForFolderCreation) return false;
2452        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2453
2454        if (dropOverView != null) {
2455            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2456            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2457                return false;
2458            }
2459        }
2460
2461        boolean hasntMoved = false;
2462        if (mDragInfo != null) {
2463            hasntMoved = dropOverView == mDragInfo.cell;
2464        }
2465
2466        if (dropOverView == null || hasntMoved || (considerTimeout && !mCreateUserFolderOnDrop)) {
2467            return false;
2468        }
2469
2470        boolean aboveShortcut = (dropOverView.getTag() instanceof ShortcutInfo);
2471        boolean willBecomeShortcut =
2472                (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
2473                info.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT);
2474
2475        return (aboveShortcut && willBecomeShortcut);
2476    }
2477
2478    boolean willAddToExistingUserFolder(ItemInfo dragInfo, CellLayout target, int[] targetCell,
2479            float distance) {
2480        if (distance > mMaxDistanceForFolderCreation) return false;
2481        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2482
2483        if (dropOverView != null) {
2484            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2485            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2486                return false;
2487            }
2488        }
2489
2490        if (dropOverView instanceof FolderIcon) {
2491            FolderIcon fi = (FolderIcon) dropOverView;
2492            if (fi.acceptDrop(dragInfo)) {
2493                return true;
2494            }
2495        }
2496        return false;
2497    }
2498
2499    boolean createUserFolderIfNecessary(View newView, long container, CellLayout target,
2500            int[] targetCell, float distance, boolean external, DragView dragView,
2501            Runnable postAnimationRunnable) {
2502        if (distance > mMaxDistanceForFolderCreation) return false;
2503        View v = target.getChildAt(targetCell[0], targetCell[1]);
2504
2505        boolean hasntMoved = false;
2506        if (mDragInfo != null) {
2507            CellLayout cellParent = getParentCellLayoutForView(mDragInfo.cell);
2508            hasntMoved = (mDragInfo.cellX == targetCell[0] &&
2509                    mDragInfo.cellY == targetCell[1]) && (cellParent == target);
2510        }
2511
2512        if (v == null || hasntMoved || !mCreateUserFolderOnDrop) return false;
2513        mCreateUserFolderOnDrop = false;
2514        final long screenId = (targetCell == null) ? mDragInfo.screenId : getIdForScreen(target);
2515
2516        boolean aboveShortcut = (v.getTag() instanceof ShortcutInfo);
2517        boolean willBecomeShortcut = (newView.getTag() instanceof ShortcutInfo);
2518
2519        if (aboveShortcut && willBecomeShortcut) {
2520            ShortcutInfo sourceInfo = (ShortcutInfo) newView.getTag();
2521            ShortcutInfo destInfo = (ShortcutInfo) v.getTag();
2522            // if the drag started here, we need to remove it from the workspace
2523            if (!external) {
2524                getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2525            }
2526
2527            Rect folderLocation = new Rect();
2528            float scale = mLauncher.getDragLayer().getDescendantRectRelativeToSelf(v, folderLocation);
2529            target.removeView(v);
2530
2531            FolderIcon fi =
2532                mLauncher.addFolder(target, container, screenId, targetCell[0], targetCell[1]);
2533            destInfo.cellX = -1;
2534            destInfo.cellY = -1;
2535            sourceInfo.cellX = -1;
2536            sourceInfo.cellY = -1;
2537
2538            // If the dragView is null, we can't animate
2539            boolean animate = dragView != null;
2540            if (animate) {
2541                fi.performCreateAnimation(destInfo, v, sourceInfo, dragView, folderLocation, scale,
2542                        postAnimationRunnable);
2543            } else {
2544                fi.addItem(destInfo);
2545                fi.addItem(sourceInfo);
2546            }
2547            return true;
2548        }
2549        return false;
2550    }
2551
2552    boolean addToExistingFolderIfNecessary(View newView, CellLayout target, int[] targetCell,
2553            float distance, DragObject d, boolean external) {
2554        if (distance > mMaxDistanceForFolderCreation) return false;
2555
2556        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2557        if (!mAddToExistingFolderOnDrop) return false;
2558        mAddToExistingFolderOnDrop = false;
2559
2560        if (dropOverView instanceof FolderIcon) {
2561            FolderIcon fi = (FolderIcon) dropOverView;
2562            if (fi.acceptDrop(d.dragInfo)) {
2563                fi.onDrop(d);
2564
2565                // if the drag started here, we need to remove it from the workspace
2566                if (!external) {
2567                    getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2568                }
2569                return true;
2570            }
2571        }
2572        return false;
2573    }
2574
2575    @Override
2576    public void prepareAccessibilityDrop() { }
2577
2578    public void onDrop(final DragObject d) {
2579        mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
2580        CellLayout dropTargetLayout = mDropToLayout;
2581
2582        // We want the point to be mapped to the dragTarget.
2583        if (dropTargetLayout != null) {
2584            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2585                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2586            } else {
2587                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2588            }
2589        }
2590
2591        int snapScreen = WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE;
2592        boolean resizeOnDrop = false;
2593        if (d.dragSource != this) {
2594            final int[] touchXY = new int[] { (int) mDragViewVisualCenter[0],
2595                    (int) mDragViewVisualCenter[1] };
2596            onDropExternal(touchXY, d.dragInfo, dropTargetLayout, false, d);
2597        } else if (mDragInfo != null) {
2598            final View cell = mDragInfo.cell;
2599
2600            Runnable resizeRunnable = null;
2601            if (dropTargetLayout != null && !d.cancelled) {
2602                // Move internally
2603                boolean hasMovedLayouts = (getParentCellLayoutForView(cell) != dropTargetLayout);
2604                boolean hasMovedIntoHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2605                long container = hasMovedIntoHotseat ?
2606                        LauncherSettings.Favorites.CONTAINER_HOTSEAT :
2607                        LauncherSettings.Favorites.CONTAINER_DESKTOP;
2608                long screenId = (mTargetCell[0] < 0) ?
2609                        mDragInfo.screenId : getIdForScreen(dropTargetLayout);
2610                int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
2611                int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
2612                // First we find the cell nearest to point at which the item is
2613                // dropped, without any consideration to whether there is an item there.
2614
2615                mTargetCell = findNearestArea((int) mDragViewVisualCenter[0], (int)
2616                        mDragViewVisualCenter[1], spanX, spanY, dropTargetLayout, mTargetCell);
2617                float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2618                        mDragViewVisualCenter[1], mTargetCell);
2619
2620                // If the item being dropped is a shortcut and the nearest drop
2621                // cell also contains a shortcut, then create a folder with the two shortcuts.
2622                if (!mInScrollArea && createUserFolderIfNecessary(cell, container,
2623                        dropTargetLayout, mTargetCell, distance, false, d.dragView, null)) {
2624                    return;
2625                }
2626
2627                if (addToExistingFolderIfNecessary(cell, dropTargetLayout, mTargetCell,
2628                        distance, d, false)) {
2629                    return;
2630                }
2631
2632                // Aside from the special case where we're dropping a shortcut onto a shortcut,
2633                // we need to find the nearest cell location that is vacant
2634                ItemInfo item = d.dragInfo;
2635                int minSpanX = item.spanX;
2636                int minSpanY = item.spanY;
2637                if (item.minSpanX > 0 && item.minSpanY > 0) {
2638                    minSpanX = item.minSpanX;
2639                    minSpanY = item.minSpanY;
2640                }
2641
2642                int[] resultSpan = new int[2];
2643                mTargetCell = dropTargetLayout.performReorder((int) mDragViewVisualCenter[0],
2644                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY, cell,
2645                        mTargetCell, resultSpan, CellLayout.MODE_ON_DROP);
2646
2647                boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2648
2649                // if the widget resizes on drop
2650                if (foundCell && (cell instanceof AppWidgetHostView) &&
2651                        (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY)) {
2652                    resizeOnDrop = true;
2653                    item.spanX = resultSpan[0];
2654                    item.spanY = resultSpan[1];
2655                    AppWidgetHostView awhv = (AppWidgetHostView) cell;
2656                    AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, resultSpan[0],
2657                            resultSpan[1]);
2658                }
2659
2660                if (getScreenIdForPageIndex(mCurrentPage) != screenId && !hasMovedIntoHotseat) {
2661                    snapScreen = getPageIndexForScreenId(screenId);
2662                    snapToPage(snapScreen);
2663                }
2664
2665                if (foundCell) {
2666                    final ItemInfo info = (ItemInfo) cell.getTag();
2667                    if (hasMovedLayouts) {
2668                        // Reparent the view
2669                        CellLayout parentCell = getParentCellLayoutForView(cell);
2670                        if (parentCell != null) {
2671                            parentCell.removeView(cell);
2672                        } else if (LauncherAppState.isDogfoodBuild()) {
2673                            throw new NullPointerException("mDragInfo.cell has null parent");
2674                        }
2675                        addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
2676                                info.spanX, info.spanY);
2677                    }
2678
2679                    // update the item's position after drop
2680                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2681                    lp.cellX = lp.tmpCellX = mTargetCell[0];
2682                    lp.cellY = lp.tmpCellY = mTargetCell[1];
2683                    lp.cellHSpan = item.spanX;
2684                    lp.cellVSpan = item.spanY;
2685                    lp.isLockedToGrid = true;
2686
2687                    if (container != LauncherSettings.Favorites.CONTAINER_HOTSEAT &&
2688                            cell instanceof LauncherAppWidgetHostView) {
2689                        final CellLayout cellLayout = dropTargetLayout;
2690                        // We post this call so that the widget has a chance to be placed
2691                        // in its final location
2692
2693                        final LauncherAppWidgetHostView hostView = (LauncherAppWidgetHostView) cell;
2694                        AppWidgetProviderInfo pInfo = hostView.getAppWidgetInfo();
2695                        if (pInfo != null && pInfo.resizeMode != AppWidgetProviderInfo.RESIZE_NONE
2696                                && !d.accessibleDrag) {
2697                            final Runnable addResizeFrame = new Runnable() {
2698                                public void run() {
2699                                    DragLayer dragLayer = mLauncher.getDragLayer();
2700                                    dragLayer.addResizeFrame(info, hostView, cellLayout);
2701                                }
2702                            };
2703                            resizeRunnable = (new Runnable() {
2704                                public void run() {
2705                                    if (!isPageMoving()) {
2706                                        addResizeFrame.run();
2707                                    } else {
2708                                        mDelayedResizeRunnable = addResizeFrame;
2709                                    }
2710                                }
2711                            });
2712                        }
2713                    }
2714
2715                    LauncherModel.modifyItemInDatabase(mLauncher, info, container, screenId, lp.cellX,
2716                            lp.cellY, item.spanX, item.spanY);
2717                } else {
2718                    // If we can't find a drop location, we return the item to its original position
2719                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2720                    mTargetCell[0] = lp.cellX;
2721                    mTargetCell[1] = lp.cellY;
2722                    CellLayout layout = (CellLayout) cell.getParent().getParent();
2723                    layout.markCellsAsOccupiedForView(cell);
2724                }
2725            }
2726
2727            final CellLayout parent = (CellLayout) cell.getParent().getParent();
2728            final Runnable finalResizeRunnable = resizeRunnable;
2729            // Prepare it to be animated into its new position
2730            // This must be called after the view has been re-parented
2731            final Runnable onCompleteRunnable = new Runnable() {
2732                @Override
2733                public void run() {
2734                    mAnimatingViewIntoPlace = false;
2735                    updateChildrenLayersEnabled(false);
2736                    if (finalResizeRunnable != null) {
2737                        finalResizeRunnable.run();
2738                    }
2739                }
2740            };
2741            mAnimatingViewIntoPlace = true;
2742            if (d.dragView.hasDrawn()) {
2743                final ItemInfo info = (ItemInfo) cell.getTag();
2744                boolean isWidget = info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
2745                        || info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
2746                if (isWidget) {
2747                    int animationType = resizeOnDrop ? ANIMATE_INTO_POSITION_AND_RESIZE :
2748                            ANIMATE_INTO_POSITION_AND_DISAPPEAR;
2749                    animateWidgetDrop(info, parent, d.dragView,
2750                            onCompleteRunnable, animationType, cell, false);
2751                } else {
2752                    int duration = snapScreen < 0 ?
2753                            WorkspaceStateTransitionAnimation.SCROLL_TO_CURRENT_PAGE :
2754                                    ADJACENT_SCREEN_DROP_DURATION;
2755                    mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
2756                            onCompleteRunnable, this);
2757                }
2758            } else {
2759                d.deferDragViewCleanupPostAnimation = false;
2760                cell.setVisibility(VISIBLE);
2761            }
2762            parent.onDropChild(cell);
2763        }
2764    }
2765
2766    public void setFinalScrollForPageChange(int pageIndex) {
2767        CellLayout cl = (CellLayout) getChildAt(pageIndex);
2768        if (cl != null) {
2769            mSavedScrollX = getScrollX();
2770            mSavedTranslationX = cl.getTranslationX();
2771            mSavedRotationY = cl.getRotationY();
2772            final int newX = getScrollForPage(pageIndex);
2773            setScrollX(newX);
2774            cl.setTranslationX(0f);
2775            cl.setRotationY(0f);
2776        }
2777    }
2778
2779    public void resetFinalScrollForPageChange(int pageIndex) {
2780        if (pageIndex >= 0) {
2781            CellLayout cl = (CellLayout) getChildAt(pageIndex);
2782            setScrollX(mSavedScrollX);
2783            cl.setTranslationX(mSavedTranslationX);
2784            cl.setRotationY(mSavedRotationY);
2785        }
2786    }
2787
2788    public void getViewLocationRelativeToSelf(View v, int[] location) {
2789        getLocationInWindow(location);
2790        int x = location[0];
2791        int y = location[1];
2792
2793        v.getLocationInWindow(location);
2794        int vX = location[0];
2795        int vY = location[1];
2796
2797        location[0] = vX - x;
2798        location[1] = vY - y;
2799    }
2800
2801    @Override
2802    public void onDragEnter(DragObject d) {
2803        if (ENFORCE_DRAG_EVENT_ORDER) {
2804            enfoceDragParity("onDragEnter", 1, 1);
2805        }
2806
2807        mCreateUserFolderOnDrop = false;
2808        mAddToExistingFolderOnDrop = false;
2809
2810        mDropToLayout = null;
2811        CellLayout layout = getCurrentDropLayout();
2812        setCurrentDropLayout(layout);
2813        setCurrentDragOverlappingLayout(layout);
2814
2815        if (!workspaceInModalState()) {
2816            mLauncher.getDragLayer().showPageHints();
2817        }
2818    }
2819
2820    /** Return a rect that has the cellWidth/cellHeight (left, top), and
2821     * widthGap/heightGap (right, bottom) */
2822    static Rect getCellLayoutMetrics(Launcher launcher, int orientation) {
2823        LauncherAppState app = LauncherAppState.getInstance();
2824        InvariantDeviceProfile inv = app.getInvariantDeviceProfile();
2825
2826        Display display = launcher.getWindowManager().getDefaultDisplay();
2827        Point smallestSize = new Point();
2828        Point largestSize = new Point();
2829        display.getCurrentSizeRange(smallestSize, largestSize);
2830        int countX = (int) inv.numColumns;
2831        int countY = (int) inv.numRows;
2832        boolean isLayoutRtl = Utilities.isRtl(launcher.getResources());
2833        if (orientation == CellLayout.LANDSCAPE) {
2834            if (mLandscapeCellLayoutMetrics == null) {
2835                Rect padding = inv.landscapeProfile.getWorkspacePadding(isLayoutRtl);
2836                int width = largestSize.x - padding.left - padding.right;
2837                int height = smallestSize.y - padding.top - padding.bottom;
2838                mLandscapeCellLayoutMetrics = new Rect();
2839                mLandscapeCellLayoutMetrics.set(
2840                        DeviceProfile.calculateCellWidth(width, countX),
2841                        DeviceProfile.calculateCellHeight(height, countY), 0, 0);
2842            }
2843            return mLandscapeCellLayoutMetrics;
2844        } else if (orientation == CellLayout.PORTRAIT) {
2845            if (mPortraitCellLayoutMetrics == null) {
2846                Rect padding = inv.portraitProfile.getWorkspacePadding(isLayoutRtl);
2847                int width = smallestSize.x - padding.left - padding.right;
2848                int height = largestSize.y - padding.top - padding.bottom;
2849                mPortraitCellLayoutMetrics = new Rect();
2850                mPortraitCellLayoutMetrics.set(
2851                        DeviceProfile.calculateCellWidth(width, countX),
2852                        DeviceProfile.calculateCellHeight(height, countY), 0, 0);
2853            }
2854            return mPortraitCellLayoutMetrics;
2855        }
2856        return null;
2857    }
2858
2859    @Override
2860    public void onDragExit(DragObject d) {
2861        if (ENFORCE_DRAG_EVENT_ORDER) {
2862            enfoceDragParity("onDragExit", -1, 0);
2863        }
2864
2865        // Here we store the final page that will be dropped to, if the workspace in fact
2866        // receives the drop
2867        if (mInScrollArea) {
2868            if (isPageMoving()) {
2869                // If the user drops while the page is scrolling, we should use that page as the
2870                // destination instead of the page that is being hovered over.
2871                mDropToLayout = (CellLayout) getPageAt(getNextPage());
2872            } else {
2873                mDropToLayout = mDragOverlappingLayout;
2874            }
2875        } else {
2876            mDropToLayout = mDragTargetLayout;
2877        }
2878
2879        if (mDragMode == DRAG_MODE_CREATE_FOLDER) {
2880            mCreateUserFolderOnDrop = true;
2881        } else if (mDragMode == DRAG_MODE_ADD_TO_FOLDER) {
2882            mAddToExistingFolderOnDrop = true;
2883        }
2884
2885        // Reset the scroll area and previous drag target
2886        onResetScrollArea();
2887        setCurrentDropLayout(null);
2888        setCurrentDragOverlappingLayout(null);
2889
2890        mSpringLoadedDragController.cancel();
2891
2892        mLauncher.getDragLayer().hidePageHints();
2893    }
2894
2895    private void enfoceDragParity(String event, int update, int expectedValue) {
2896        enfoceDragParity(this, event, update, expectedValue);
2897        for (int i = 0; i < getChildCount(); i++) {
2898            enfoceDragParity(getChildAt(i), event, update, expectedValue);
2899        }
2900    }
2901
2902    private void enfoceDragParity(View v, String event, int update, int expectedValue) {
2903        Object tag = v.getTag(R.id.drag_event_parity);
2904        int value = tag == null ? 0 : (Integer) tag;
2905        value += update;
2906        v.setTag(R.id.drag_event_parity, value);
2907
2908        if (value != expectedValue) {
2909            Log.e(TAG, event + ": Drag contract violated: " + value);
2910        }
2911    }
2912
2913    void setCurrentDropLayout(CellLayout layout) {
2914        if (mDragTargetLayout != null) {
2915            mDragTargetLayout.revertTempState();
2916            mDragTargetLayout.onDragExit();
2917        }
2918        mDragTargetLayout = layout;
2919        if (mDragTargetLayout != null) {
2920            mDragTargetLayout.onDragEnter();
2921        }
2922        cleanupReorder(true);
2923        cleanupFolderCreation();
2924        setCurrentDropOverCell(-1, -1);
2925    }
2926
2927    void setCurrentDragOverlappingLayout(CellLayout layout) {
2928        if (mDragOverlappingLayout != null) {
2929            mDragOverlappingLayout.setIsDragOverlapping(false);
2930        }
2931        mDragOverlappingLayout = layout;
2932        if (mDragOverlappingLayout != null) {
2933            mDragOverlappingLayout.setIsDragOverlapping(true);
2934        }
2935        invalidate();
2936    }
2937
2938    void setCurrentDropOverCell(int x, int y) {
2939        if (x != mDragOverX || y != mDragOverY) {
2940            mDragOverX = x;
2941            mDragOverY = y;
2942            setDragMode(DRAG_MODE_NONE);
2943        }
2944    }
2945
2946    void setDragMode(int dragMode) {
2947        if (dragMode != mDragMode) {
2948            if (dragMode == DRAG_MODE_NONE) {
2949                cleanupAddToFolder();
2950                // We don't want to cancel the re-order alarm every time the target cell changes
2951                // as this feels to slow / unresponsive.
2952                cleanupReorder(false);
2953                cleanupFolderCreation();
2954            } else if (dragMode == DRAG_MODE_ADD_TO_FOLDER) {
2955                cleanupReorder(true);
2956                cleanupFolderCreation();
2957            } else if (dragMode == DRAG_MODE_CREATE_FOLDER) {
2958                cleanupAddToFolder();
2959                cleanupReorder(true);
2960            } else if (dragMode == DRAG_MODE_REORDER) {
2961                cleanupAddToFolder();
2962                cleanupFolderCreation();
2963            }
2964            mDragMode = dragMode;
2965        }
2966    }
2967
2968    private void cleanupFolderCreation() {
2969        if (mDragFolderRingAnimator != null) {
2970            mDragFolderRingAnimator.animateToNaturalState();
2971            mDragFolderRingAnimator = null;
2972        }
2973        mFolderCreationAlarm.setOnAlarmListener(null);
2974        mFolderCreationAlarm.cancelAlarm();
2975    }
2976
2977    private void cleanupAddToFolder() {
2978        if (mDragOverFolderIcon != null) {
2979            mDragOverFolderIcon.onDragExit(null);
2980            mDragOverFolderIcon = null;
2981        }
2982    }
2983
2984    private void cleanupReorder(boolean cancelAlarm) {
2985        // Any pending reorders are canceled
2986        if (cancelAlarm) {
2987            mReorderAlarm.cancelAlarm();
2988        }
2989        mLastReorderX = -1;
2990        mLastReorderY = -1;
2991    }
2992
2993   /*
2994    *
2995    * Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's
2996    * coordinate space. The argument xy is modified with the return result.
2997    *
2998    * if cachedInverseMatrix is not null, this method will just use that matrix instead of
2999    * computing it itself; we use this to avoid redundant matrix inversions in
3000    * findMatchingPageForDragOver
3001    *
3002    */
3003   void mapPointFromSelfToChild(View v, float[] xy, Matrix cachedInverseMatrix) {
3004       xy[0] = xy[0] - v.getLeft();
3005       xy[1] = xy[1] - v.getTop();
3006   }
3007
3008   boolean isPointInSelfOverHotseat(int x, int y, Rect r) {
3009       if (r == null) {
3010           r = new Rect();
3011       }
3012       mTempPt[0] = x;
3013       mTempPt[1] = y;
3014       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
3015
3016       DeviceProfile grid = mLauncher.getDeviceProfile();
3017       r = grid.getHotseatRect();
3018       if (r.contains(mTempPt[0], mTempPt[1])) {
3019           return true;
3020       }
3021       return false;
3022   }
3023
3024   void mapPointFromSelfToHotseatLayout(Hotseat hotseat, float[] xy) {
3025       mTempPt[0] = (int) xy[0];
3026       mTempPt[1] = (int) xy[1];
3027       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
3028       mLauncher.getDragLayer().mapCoordInSelfToDescendent(hotseat.getLayout(), mTempPt);
3029
3030       xy[0] = mTempPt[0];
3031       xy[1] = mTempPt[1];
3032   }
3033
3034   /*
3035    *
3036    * Convert the 2D coordinate xy from this CellLayout's coordinate space to
3037    * the parent View's coordinate space. The argument xy is modified with the return result.
3038    *
3039    */
3040   void mapPointFromChildToSelf(View v, float[] xy) {
3041       xy[0] += v.getLeft();
3042       xy[1] += v.getTop();
3043   }
3044
3045   static private float squaredDistance(float[] point1, float[] point2) {
3046        float distanceX = point1[0] - point2[0];
3047        float distanceY = point2[1] - point2[1];
3048        return distanceX * distanceX + distanceY * distanceY;
3049   }
3050
3051    /*
3052     *
3053     * This method returns the CellLayout that is currently being dragged to. In order to drag
3054     * to a CellLayout, either the touch point must be directly over the CellLayout, or as a second
3055     * strategy, we see if the dragView is overlapping any CellLayout and choose the closest one
3056     *
3057     * Return null if no CellLayout is currently being dragged over
3058     *
3059     */
3060    private CellLayout findMatchingPageForDragOver(
3061            DragView dragView, float originX, float originY, boolean exact) {
3062        // We loop through all the screens (ie CellLayouts) and see which ones overlap
3063        // with the item being dragged and then choose the one that's closest to the touch point
3064        final int screenCount = getChildCount();
3065        CellLayout bestMatchingScreen = null;
3066        float smallestDistSoFar = Float.MAX_VALUE;
3067
3068        for (int i = 0; i < screenCount; i++) {
3069            // The custom content screen is not a valid drag over option
3070            if (mScreenOrder.get(i) == CUSTOM_CONTENT_SCREEN_ID) {
3071                continue;
3072            }
3073
3074            CellLayout cl = (CellLayout) getChildAt(i);
3075
3076            final float[] touchXy = {originX, originY};
3077            // Transform the touch coordinates to the CellLayout's local coordinates
3078            // If the touch point is within the bounds of the cell layout, we can return immediately
3079            cl.getMatrix().invert(mTempInverseMatrix);
3080            mapPointFromSelfToChild(cl, touchXy, mTempInverseMatrix);
3081
3082            if (touchXy[0] >= 0 && touchXy[0] <= cl.getWidth() &&
3083                    touchXy[1] >= 0 && touchXy[1] <= cl.getHeight()) {
3084                return cl;
3085            }
3086
3087            if (!exact) {
3088                // Get the center of the cell layout in screen coordinates
3089                final float[] cellLayoutCenter = mTempCellLayoutCenterCoordinates;
3090                cellLayoutCenter[0] = cl.getWidth()/2;
3091                cellLayoutCenter[1] = cl.getHeight()/2;
3092                mapPointFromChildToSelf(cl, cellLayoutCenter);
3093
3094                touchXy[0] = originX;
3095                touchXy[1] = originY;
3096
3097                // Calculate the distance between the center of the CellLayout
3098                // and the touch point
3099                float dist = squaredDistance(touchXy, cellLayoutCenter);
3100
3101                if (dist < smallestDistSoFar) {
3102                    smallestDistSoFar = dist;
3103                    bestMatchingScreen = cl;
3104                }
3105            }
3106        }
3107        return bestMatchingScreen;
3108    }
3109
3110    private boolean isDragWidget(DragObject d) {
3111        return (d.dragInfo instanceof LauncherAppWidgetInfo ||
3112                d.dragInfo instanceof PendingAddWidgetInfo);
3113    }
3114    private boolean isExternalDragWidget(DragObject d) {
3115        return d.dragSource != this && isDragWidget(d);
3116    }
3117
3118    public void onDragOver(DragObject d) {
3119        // Skip drag over events while we are dragging over side pages
3120        if (mInScrollArea || !transitionStateShouldAllowDrop()) return;
3121
3122        Rect r = new Rect();
3123        CellLayout layout = null;
3124        ItemInfo item = d.dragInfo;
3125        if (item == null) {
3126            if (LauncherAppState.isDogfoodBuild()) {
3127                throw new NullPointerException("DragObject has null info");
3128            }
3129            return;
3130        }
3131
3132        // Ensure that we have proper spans for the item that we are dropping
3133        if (item.spanX < 0 || item.spanY < 0) throw new RuntimeException("Improper spans found");
3134        mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
3135
3136        final View child = (mDragInfo == null) ? null : mDragInfo.cell;
3137        // Identify whether we have dragged over a side page
3138        if (workspaceInModalState()) {
3139            if (mLauncher.getHotseat() != null && !isExternalDragWidget(d)) {
3140                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3141                    layout = mLauncher.getHotseat().getLayout();
3142                }
3143            }
3144            if (layout == null) {
3145                layout = findMatchingPageForDragOver(d.dragView, d.x, d.y, false);
3146            }
3147            if (layout != mDragTargetLayout) {
3148                setCurrentDropLayout(layout);
3149                setCurrentDragOverlappingLayout(layout);
3150
3151                boolean isInSpringLoadedMode = (mState == State.SPRING_LOADED);
3152                if (isInSpringLoadedMode) {
3153                    if (mLauncher.isHotseatLayout(layout)) {
3154                        mSpringLoadedDragController.cancel();
3155                    } else {
3156                        mSpringLoadedDragController.setAlarm(mDragTargetLayout);
3157                    }
3158                }
3159            }
3160        } else {
3161            // Test to see if we are over the hotseat otherwise just use the current page
3162            if (mLauncher.getHotseat() != null && !isDragWidget(d)) {
3163                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3164                    layout = mLauncher.getHotseat().getLayout();
3165                }
3166            }
3167            if (layout == null) {
3168                layout = getCurrentDropLayout();
3169            }
3170            if (layout != mDragTargetLayout) {
3171                setCurrentDropLayout(layout);
3172                setCurrentDragOverlappingLayout(layout);
3173            }
3174        }
3175
3176        // Handle the drag over
3177        if (mDragTargetLayout != null) {
3178            // We want the point to be mapped to the dragTarget.
3179            if (mLauncher.isHotseatLayout(mDragTargetLayout)) {
3180                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
3181            } else {
3182                mapPointFromSelfToChild(mDragTargetLayout, mDragViewVisualCenter, null);
3183            }
3184
3185            ItemInfo info = d.dragInfo;
3186
3187            int minSpanX = item.spanX;
3188            int minSpanY = item.spanY;
3189            if (item.minSpanX > 0 && item.minSpanY > 0) {
3190                minSpanX = item.minSpanX;
3191                minSpanY = item.minSpanY;
3192            }
3193
3194            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3195                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY,
3196                    mDragTargetLayout, mTargetCell);
3197            int reorderX = mTargetCell[0];
3198            int reorderY = mTargetCell[1];
3199
3200            setCurrentDropOverCell(mTargetCell[0], mTargetCell[1]);
3201
3202            float targetCellDistance = mDragTargetLayout.getDistanceFromCell(
3203                    mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
3204
3205            final View dragOverView = mDragTargetLayout.getChildAt(mTargetCell[0],
3206                    mTargetCell[1]);
3207
3208            manageFolderFeedback(info, mDragTargetLayout, mTargetCell,
3209                    targetCellDistance, dragOverView, d.accessibleDrag);
3210
3211            boolean nearestDropOccupied = mDragTargetLayout.isNearestDropLocationOccupied((int)
3212                    mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1], item.spanX,
3213                    item.spanY, child, mTargetCell);
3214
3215            if (!nearestDropOccupied) {
3216                mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3217                        (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3218                        mTargetCell[0], mTargetCell[1], item.spanX, item.spanY, false,
3219                        d.dragView.getDragVisualizeOffset(), d.dragView.getDragRegion());
3220            } else if ((mDragMode == DRAG_MODE_NONE || mDragMode == DRAG_MODE_REORDER)
3221                    && !mReorderAlarm.alarmPending() && (mLastReorderX != reorderX ||
3222                    mLastReorderY != reorderY)) {
3223
3224                int[] resultSpan = new int[2];
3225                mDragTargetLayout.performReorder((int) mDragViewVisualCenter[0],
3226                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, item.spanX, item.spanY,
3227                        child, mTargetCell, resultSpan, CellLayout.MODE_SHOW_REORDER_HINT);
3228
3229                // Otherwise, if we aren't adding to or creating a folder and there's no pending
3230                // reorder, then we schedule a reorder
3231                ReorderAlarmListener listener = new ReorderAlarmListener(mDragViewVisualCenter,
3232                        minSpanX, minSpanY, item.spanX, item.spanY, d.dragView, child);
3233                mReorderAlarm.setOnAlarmListener(listener);
3234                mReorderAlarm.setAlarm(REORDER_TIMEOUT);
3235            }
3236
3237            if (mDragMode == DRAG_MODE_CREATE_FOLDER || mDragMode == DRAG_MODE_ADD_TO_FOLDER ||
3238                    !nearestDropOccupied) {
3239                if (mDragTargetLayout != null) {
3240                    mDragTargetLayout.revertTempState();
3241                }
3242            }
3243        }
3244    }
3245
3246    private void manageFolderFeedback(ItemInfo info, CellLayout targetLayout,
3247            int[] targetCell, float distance, View dragOverView, boolean accessibleDrag) {
3248        boolean userFolderPending = willCreateUserFolder(info, targetLayout, targetCell, distance,
3249                false);
3250        if (mDragMode == DRAG_MODE_NONE && userFolderPending &&
3251                !mFolderCreationAlarm.alarmPending()) {
3252
3253            FolderCreationAlarmListener listener = new
3254                    FolderCreationAlarmListener(targetLayout, targetCell[0], targetCell[1]);
3255
3256            if (!accessibleDrag) {
3257                mFolderCreationAlarm.setOnAlarmListener(listener);
3258                mFolderCreationAlarm.setAlarm(FOLDER_CREATION_TIMEOUT);
3259            } else {
3260                listener.onAlarm(mFolderCreationAlarm);
3261            }
3262            return;
3263        }
3264
3265        boolean willAddToFolder =
3266                willAddToExistingUserFolder(info, targetLayout, targetCell, distance);
3267
3268        if (willAddToFolder && mDragMode == DRAG_MODE_NONE) {
3269            mDragOverFolderIcon = ((FolderIcon) dragOverView);
3270            mDragOverFolderIcon.onDragEnter(info);
3271            if (targetLayout != null) {
3272                targetLayout.clearDragOutlines();
3273            }
3274            setDragMode(DRAG_MODE_ADD_TO_FOLDER);
3275            return;
3276        }
3277
3278        if (mDragMode == DRAG_MODE_ADD_TO_FOLDER && !willAddToFolder) {
3279            setDragMode(DRAG_MODE_NONE);
3280        }
3281        if (mDragMode == DRAG_MODE_CREATE_FOLDER && !userFolderPending) {
3282            setDragMode(DRAG_MODE_NONE);
3283        }
3284
3285        return;
3286    }
3287
3288    class FolderCreationAlarmListener implements OnAlarmListener {
3289        CellLayout layout;
3290        int cellX;
3291        int cellY;
3292
3293        public FolderCreationAlarmListener(CellLayout layout, int cellX, int cellY) {
3294            this.layout = layout;
3295            this.cellX = cellX;
3296            this.cellY = cellY;
3297        }
3298
3299        public void onAlarm(Alarm alarm) {
3300            if (mDragFolderRingAnimator != null) {
3301                // This shouldn't happen ever, but just in case, make sure we clean up the mess.
3302                mDragFolderRingAnimator.animateToNaturalState();
3303            }
3304            mDragFolderRingAnimator = new FolderRingAnimator(mLauncher, null);
3305            mDragFolderRingAnimator.setCell(cellX, cellY);
3306            mDragFolderRingAnimator.setCellLayout(layout);
3307            mDragFolderRingAnimator.animateToAcceptState();
3308            layout.showFolderAccept(mDragFolderRingAnimator);
3309            layout.clearDragOutlines();
3310            setDragMode(DRAG_MODE_CREATE_FOLDER);
3311        }
3312    }
3313
3314    class ReorderAlarmListener implements OnAlarmListener {
3315        float[] dragViewCenter;
3316        int minSpanX, minSpanY, spanX, spanY;
3317        DragView dragView;
3318        View child;
3319
3320        public ReorderAlarmListener(float[] dragViewCenter, int minSpanX, int minSpanY, int spanX,
3321                int spanY, DragView dragView, View child) {
3322            this.dragViewCenter = dragViewCenter;
3323            this.minSpanX = minSpanX;
3324            this.minSpanY = minSpanY;
3325            this.spanX = spanX;
3326            this.spanY = spanY;
3327            this.child = child;
3328            this.dragView = dragView;
3329        }
3330
3331        public void onAlarm(Alarm alarm) {
3332            int[] resultSpan = new int[2];
3333            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3334                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, mDragTargetLayout,
3335                    mTargetCell);
3336            mLastReorderX = mTargetCell[0];
3337            mLastReorderY = mTargetCell[1];
3338
3339            mTargetCell = mDragTargetLayout.performReorder((int) mDragViewVisualCenter[0],
3340                (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
3341                child, mTargetCell, resultSpan, CellLayout.MODE_DRAG_OVER);
3342
3343            if (mTargetCell[0] < 0 || mTargetCell[1] < 0) {
3344                mDragTargetLayout.revertTempState();
3345            } else {
3346                setDragMode(DRAG_MODE_REORDER);
3347            }
3348
3349            boolean resize = resultSpan[0] != spanX || resultSpan[1] != spanY;
3350            mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3351                (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3352                mTargetCell[0], mTargetCell[1], resultSpan[0], resultSpan[1], resize,
3353                dragView.getDragVisualizeOffset(), dragView.getDragRegion());
3354        }
3355    }
3356
3357    @Override
3358    public void getHitRectRelativeToDragLayer(Rect outRect) {
3359        // We want the workspace to have the whole area of the display (it will find the correct
3360        // cell layout to drop to in the existing drag/drop logic.
3361        mLauncher.getDragLayer().getDescendantRectRelativeToSelf(this, outRect);
3362    }
3363
3364    /**
3365     * Drop an item that didn't originate on one of the workspace screens.
3366     * It may have come from Launcher (e.g. from all apps or customize), or it may have
3367     * come from another app altogether.
3368     *
3369     * NOTE: This can also be called when we are outside of a drag event, when we want
3370     * to add an item to one of the workspace screens.
3371     */
3372    private void onDropExternal(final int[] touchXY, final ItemInfo dragInfo,
3373            final CellLayout cellLayout, boolean insertAtFirst, DragObject d) {
3374        final Runnable exitSpringLoadedRunnable = new Runnable() {
3375            @Override
3376            public void run() {
3377                mLauncher.exitSpringLoadedDragModeDelayed(true,
3378                        Launcher.EXIT_SPRINGLOADED_MODE_SHORT_TIMEOUT, null);
3379            }
3380        };
3381
3382        ItemInfo info = dragInfo;
3383        int spanX = info.spanX;
3384        int spanY = info.spanY;
3385        if (mDragInfo != null) {
3386            spanX = mDragInfo.spanX;
3387            spanY = mDragInfo.spanY;
3388        }
3389
3390        final long container = mLauncher.isHotseatLayout(cellLayout) ?
3391                LauncherSettings.Favorites.CONTAINER_HOTSEAT :
3392                    LauncherSettings.Favorites.CONTAINER_DESKTOP;
3393        final long screenId = getIdForScreen(cellLayout);
3394        if (!mLauncher.isHotseatLayout(cellLayout)
3395                && screenId != getScreenIdForPageIndex(mCurrentPage)
3396                && mState != State.SPRING_LOADED) {
3397            snapToScreenId(screenId, null);
3398        }
3399
3400        if (info instanceof PendingAddItemInfo) {
3401            final PendingAddItemInfo pendingInfo = (PendingAddItemInfo) dragInfo;
3402
3403            boolean findNearestVacantCell = true;
3404            if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
3405                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3406                        cellLayout, mTargetCell);
3407                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3408                        mDragViewVisualCenter[1], mTargetCell);
3409                if (willCreateUserFolder(d.dragInfo, cellLayout, mTargetCell, distance, true)
3410                        || willAddToExistingUserFolder(
3411                                d.dragInfo, cellLayout, mTargetCell, distance)) {
3412                    findNearestVacantCell = false;
3413                }
3414            }
3415
3416            final ItemInfo item = d.dragInfo;
3417            boolean updateWidgetSize = false;
3418            if (findNearestVacantCell) {
3419                int minSpanX = item.spanX;
3420                int minSpanY = item.spanY;
3421                if (item.minSpanX > 0 && item.minSpanY > 0) {
3422                    minSpanX = item.minSpanX;
3423                    minSpanY = item.minSpanY;
3424                }
3425                int[] resultSpan = new int[2];
3426                mTargetCell = cellLayout.performReorder((int) mDragViewVisualCenter[0],
3427                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, info.spanX, info.spanY,
3428                        null, mTargetCell, resultSpan, CellLayout.MODE_ON_DROP_EXTERNAL);
3429
3430                if (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY) {
3431                    updateWidgetSize = true;
3432                }
3433                item.spanX = resultSpan[0];
3434                item.spanY = resultSpan[1];
3435            }
3436
3437            Runnable onAnimationCompleteRunnable = new Runnable() {
3438                @Override
3439                public void run() {
3440                    // Normally removeExtraEmptyScreen is called in Workspace#onDragEnd, but when
3441                    // adding an item that may not be dropped right away (due to a config activity)
3442                    // we defer the removal until the activity returns.
3443                    deferRemoveExtraEmptyScreen();
3444
3445                    // When dragging and dropping from customization tray, we deal with creating
3446                    // widgets/shortcuts/folders in a slightly different way
3447                    mLauncher.addPendingItem(pendingInfo, container, screenId, mTargetCell,
3448                            item.spanX, item.spanY);
3449                }
3450            };
3451            boolean isWidget = pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
3452                    || pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
3453
3454            View finalView = isWidget ? ((PendingAddWidgetInfo) pendingInfo).boundWidget : null;
3455
3456            if (finalView instanceof AppWidgetHostView && updateWidgetSize) {
3457                AppWidgetHostView awhv = (AppWidgetHostView) finalView;
3458                AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, item.spanX,
3459                        item.spanY);
3460            }
3461
3462            int animationStyle = ANIMATE_INTO_POSITION_AND_DISAPPEAR;
3463            if (isWidget && ((PendingAddWidgetInfo) pendingInfo).info != null &&
3464                    ((PendingAddWidgetInfo) pendingInfo).info.configure != null) {
3465                animationStyle = ANIMATE_INTO_POSITION_AND_REMAIN;
3466            }
3467            animateWidgetDrop(info, cellLayout, d.dragView, onAnimationCompleteRunnable,
3468                    animationStyle, finalView, true);
3469        } else {
3470            // This is for other drag/drop cases, like dragging from All Apps
3471            View view = null;
3472
3473            switch (info.itemType) {
3474            case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
3475            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
3476                if (info.container == NO_ID && info instanceof AppInfo) {
3477                    // Came from all apps -- make a copy
3478                    info = ((AppInfo) info).makeShortcut();
3479                }
3480                view = mLauncher.createShortcut(cellLayout, (ShortcutInfo) info);
3481                break;
3482            case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
3483                view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, cellLayout,
3484                        (FolderInfo) info, mIconCache);
3485                break;
3486            default:
3487                throw new IllegalStateException("Unknown item type: " + info.itemType);
3488            }
3489
3490            // First we find the cell nearest to point at which the item is
3491            // dropped, without any consideration to whether there is an item there.
3492            if (touchXY != null) {
3493                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3494                        cellLayout, mTargetCell);
3495                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3496                        mDragViewVisualCenter[1], mTargetCell);
3497                d.postAnimationRunnable = exitSpringLoadedRunnable;
3498                if (createUserFolderIfNecessary(view, container, cellLayout, mTargetCell, distance,
3499                        true, d.dragView, d.postAnimationRunnable)) {
3500                    return;
3501                }
3502                if (addToExistingFolderIfNecessary(view, cellLayout, mTargetCell, distance, d,
3503                        true)) {
3504                    return;
3505                }
3506            }
3507
3508            if (touchXY != null) {
3509                // when dragging and dropping, just find the closest free spot
3510                mTargetCell = cellLayout.performReorder((int) mDragViewVisualCenter[0],
3511                        (int) mDragViewVisualCenter[1], 1, 1, 1, 1,
3512                        null, mTargetCell, null, CellLayout.MODE_ON_DROP_EXTERNAL);
3513            } else {
3514                cellLayout.findCellForSpan(mTargetCell, 1, 1);
3515            }
3516            // Add the item to DB before adding to screen ensures that the container and other
3517            // values of the info is properly updated.
3518            LauncherModel.addOrMoveItemInDatabase(mLauncher, info, container, screenId,
3519                    mTargetCell[0], mTargetCell[1]);
3520
3521            addInScreen(view, container, screenId, mTargetCell[0], mTargetCell[1], info.spanX,
3522                    info.spanY, insertAtFirst);
3523            cellLayout.onDropChild(view);
3524            cellLayout.getShortcutsAndWidgets().measureChild(view);
3525
3526            if (d.dragView != null) {
3527                // We wrap the animation call in the temporary set and reset of the current
3528                // cellLayout to its final transform -- this means we animate the drag view to
3529                // the correct final location.
3530                setFinalTransitionTransform(cellLayout);
3531                mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, view,
3532                        exitSpringLoadedRunnable, this);
3533                resetTransitionTransform(cellLayout);
3534            }
3535        }
3536    }
3537
3538    public Bitmap createWidgetBitmap(ItemInfo widgetInfo, View layout) {
3539        int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(widgetInfo, false);
3540        int visibility = layout.getVisibility();
3541        layout.setVisibility(VISIBLE);
3542
3543        int width = MeasureSpec.makeMeasureSpec(unScaledSize[0], MeasureSpec.EXACTLY);
3544        int height = MeasureSpec.makeMeasureSpec(unScaledSize[1], MeasureSpec.EXACTLY);
3545        Bitmap b = Bitmap.createBitmap(unScaledSize[0], unScaledSize[1],
3546                Bitmap.Config.ARGB_8888);
3547        mCanvas.setBitmap(b);
3548
3549        layout.measure(width, height);
3550        layout.layout(0, 0, unScaledSize[0], unScaledSize[1]);
3551        layout.draw(mCanvas);
3552        mCanvas.setBitmap(null);
3553        layout.setVisibility(visibility);
3554        return b;
3555    }
3556
3557    private void getFinalPositionForDropAnimation(int[] loc, float[] scaleXY,
3558            DragView dragView, CellLayout layout, ItemInfo info, int[] targetCell,
3559            boolean external, boolean scale) {
3560        // Now we animate the dragView, (ie. the widget or shortcut preview) into its final
3561        // location and size on the home screen.
3562        int spanX = info.spanX;
3563        int spanY = info.spanY;
3564
3565        Rect r = estimateItemPosition(layout, info, targetCell[0], targetCell[1], spanX, spanY);
3566        loc[0] = r.left;
3567        loc[1] = r.top;
3568
3569        setFinalTransitionTransform(layout);
3570        float cellLayoutScale =
3571                mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(layout, loc, true);
3572        resetTransitionTransform(layout);
3573
3574        float dragViewScaleX;
3575        float dragViewScaleY;
3576        if (scale) {
3577            dragViewScaleX = (1.0f * r.width()) / dragView.getMeasuredWidth();
3578            dragViewScaleY = (1.0f * r.height()) / dragView.getMeasuredHeight();
3579        } else {
3580            dragViewScaleX = 1f;
3581            dragViewScaleY = 1f;
3582        }
3583
3584        // The animation will scale the dragView about its center, so we need to center about
3585        // the final location.
3586        loc[0] -= (dragView.getMeasuredWidth() - cellLayoutScale * r.width()) / 2;
3587        loc[1] -= (dragView.getMeasuredHeight() - cellLayoutScale * r.height()) / 2;
3588
3589        scaleXY[0] = dragViewScaleX * cellLayoutScale;
3590        scaleXY[1] = dragViewScaleY * cellLayoutScale;
3591    }
3592
3593    public void animateWidgetDrop(ItemInfo info, CellLayout cellLayout, DragView dragView,
3594            final Runnable onCompleteRunnable, int animationType, final View finalView,
3595            boolean external) {
3596        Rect from = new Rect();
3597        mLauncher.getDragLayer().getViewRectRelativeToSelf(dragView, from);
3598
3599        int[] finalPos = new int[2];
3600        float scaleXY[] = new float[2];
3601        boolean scalePreview = !(info instanceof PendingAddShortcutInfo);
3602        getFinalPositionForDropAnimation(finalPos, scaleXY, dragView, cellLayout, info, mTargetCell,
3603                external, scalePreview);
3604
3605        Resources res = mLauncher.getResources();
3606        final int duration = res.getInteger(R.integer.config_dropAnimMaxDuration) - 200;
3607
3608        // In the case where we've prebound the widget, we remove it from the DragLayer
3609        if (finalView instanceof AppWidgetHostView && external) {
3610            mLauncher.getDragLayer().removeView(finalView);
3611        }
3612
3613        boolean isWidget = info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET ||
3614                info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
3615        if ((animationType == ANIMATE_INTO_POSITION_AND_RESIZE || external) && finalView != null) {
3616            Bitmap crossFadeBitmap = createWidgetBitmap(info, finalView);
3617            dragView.setCrossFadeBitmap(crossFadeBitmap);
3618            dragView.crossFade((int) (duration * 0.8f));
3619        } else if (isWidget && external) {
3620            scaleXY[0] = scaleXY[1] = Math.min(scaleXY[0],  scaleXY[1]);
3621        }
3622
3623        DragLayer dragLayer = mLauncher.getDragLayer();
3624        if (animationType == CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION) {
3625            mLauncher.getDragLayer().animateViewIntoPosition(dragView, finalPos, 0f, 0.1f, 0.1f,
3626                    DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
3627        } else {
3628            int endStyle;
3629            if (animationType == ANIMATE_INTO_POSITION_AND_REMAIN) {
3630                endStyle = DragLayer.ANIMATION_END_REMAIN_VISIBLE;
3631            } else {
3632                endStyle = DragLayer.ANIMATION_END_DISAPPEAR;;
3633            }
3634
3635            Runnable onComplete = new Runnable() {
3636                @Override
3637                public void run() {
3638                    if (finalView != null) {
3639                        finalView.setVisibility(VISIBLE);
3640                    }
3641                    if (onCompleteRunnable != null) {
3642                        onCompleteRunnable.run();
3643                    }
3644                }
3645            };
3646            dragLayer.animateViewIntoPosition(dragView, from.left, from.top, finalPos[0],
3647                    finalPos[1], 1, 1, 1, scaleXY[0], scaleXY[1], onComplete, endStyle,
3648                    duration, this);
3649        }
3650    }
3651
3652    public void setFinalTransitionTransform(CellLayout layout) {
3653        if (isSwitchingState()) {
3654            mCurrentScale = getScaleX();
3655            setScaleX(mStateTransitionAnimation.getFinalScale());
3656            setScaleY(mStateTransitionAnimation.getFinalScale());
3657        }
3658    }
3659    public void resetTransitionTransform(CellLayout layout) {
3660        if (isSwitchingState()) {
3661            setScaleX(mCurrentScale);
3662            setScaleY(mCurrentScale);
3663        }
3664    }
3665
3666    /**
3667     * Return the current {@link CellLayout}, correctly picking the destination
3668     * screen while a scroll is in progress.
3669     */
3670    public CellLayout getCurrentDropLayout() {
3671        return (CellLayout) getChildAt(getNextPage());
3672    }
3673
3674    /**
3675     * Return the current CellInfo describing our current drag; this method exists
3676     * so that Launcher can sync this object with the correct info when the activity is created/
3677     * destroyed
3678     *
3679     */
3680    public CellLayout.CellInfo getDragInfo() {
3681        return mDragInfo;
3682    }
3683
3684    public int getCurrentPageOffsetFromCustomContent() {
3685        return getNextPage() - numCustomPages();
3686    }
3687
3688    /**
3689     * Calculate the nearest cell where the given object would be dropped.
3690     *
3691     * pixelX and pixelY should be in the coordinate system of layout
3692     */
3693    @Thunk int[] findNearestArea(int pixelX, int pixelY,
3694            int spanX, int spanY, CellLayout layout, int[] recycle) {
3695        return layout.findNearestArea(
3696                pixelX, pixelY, spanX, spanY, recycle);
3697    }
3698
3699    void setup(DragController dragController) {
3700        mSpringLoadedDragController = new SpringLoadedDragController(mLauncher);
3701        mDragController = dragController;
3702
3703        // hardware layers on children are enabled on startup, but should be disabled until
3704        // needed
3705        updateChildrenLayersEnabled(false);
3706    }
3707
3708    /**
3709     * Called at the end of a drag which originated on the workspace.
3710     */
3711    public void onDropCompleted(final View target, final DragObject d,
3712            final boolean isFlingToDelete, final boolean success) {
3713        if (mDeferDropAfterUninstall) {
3714            mDeferredAction = new Runnable() {
3715                public void run() {
3716                    onDropCompleted(target, d, isFlingToDelete, success);
3717                    mDeferredAction = null;
3718                }
3719            };
3720            return;
3721        }
3722
3723        boolean beingCalledAfterUninstall = mDeferredAction != null;
3724
3725        if (success && !(beingCalledAfterUninstall && !mUninstallSuccessful)) {
3726            if (target != this && mDragInfo != null) {
3727                removeWorkspaceItem(mDragInfo.cell);
3728            }
3729        } else if (mDragInfo != null) {
3730            final CellLayout cellLayout = mLauncher.getCellLayout(
3731                    mDragInfo.container, mDragInfo.screenId);
3732            if (cellLayout != null) {
3733                cellLayout.onDropChild(mDragInfo.cell);
3734            } else if (LauncherAppState.isDogfoodBuild()) {
3735                throw new RuntimeException("Invalid state: cellLayout == null in "
3736                        + "Workspace#onDropCompleted. Please file a bug. ");
3737            };
3738        }
3739        if ((d.cancelled || (beingCalledAfterUninstall && !mUninstallSuccessful))
3740                && mDragInfo.cell != null) {
3741            mDragInfo.cell.setVisibility(VISIBLE);
3742        }
3743        mDragOutline = null;
3744        mDragInfo = null;
3745    }
3746
3747    /**
3748     * For opposite operation. See {@link #addInScreen}.
3749     */
3750    public void removeWorkspaceItem(View v) {
3751        CellLayout parentCell = getParentCellLayoutForView(v);
3752        if (parentCell != null) {
3753            parentCell.removeView(v);
3754        } else if (LauncherAppState.isDogfoodBuild()) {
3755            throw new NullPointerException("mDragInfo.cell has null parent");
3756        }
3757        if (v instanceof DropTarget) {
3758            mDragController.removeDropTarget((DropTarget) v);
3759        }
3760    }
3761
3762    @Override
3763    public void deferCompleteDropAfterUninstallActivity() {
3764        mDeferDropAfterUninstall = true;
3765    }
3766
3767    /// maybe move this into a smaller part
3768    @Override
3769    public void onUninstallActivityReturned(boolean success) {
3770        mDeferDropAfterUninstall = false;
3771        mUninstallSuccessful = success;
3772        if (mDeferredAction != null) {
3773            mDeferredAction.run();
3774        }
3775    }
3776
3777    void saveWorkspaceToDb() {
3778        saveWorkspaceScreenToDb((CellLayout) mLauncher.getHotseat().getLayout());
3779        int count = getChildCount();
3780        for (int i = 0; i < count; i++) {
3781            CellLayout cl = (CellLayout) getChildAt(i);
3782            saveWorkspaceScreenToDb(cl);
3783        }
3784    }
3785
3786    void saveWorkspaceScreenToDb(CellLayout cl) {
3787        int count = cl.getShortcutsAndWidgets().getChildCount();
3788
3789        long screenId = getIdForScreen(cl);
3790        int container = Favorites.CONTAINER_DESKTOP;
3791
3792        Hotseat hotseat = mLauncher.getHotseat();
3793        if (mLauncher.isHotseatLayout(cl)) {
3794            screenId = -1;
3795            container = Favorites.CONTAINER_HOTSEAT;
3796        }
3797
3798        for (int i = 0; i < count; i++) {
3799            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3800            ItemInfo info = (ItemInfo) v.getTag();
3801            // Null check required as the AllApps button doesn't have an item info
3802            if (info != null) {
3803                int cellX = info.cellX;
3804                int cellY = info.cellY;
3805                if (container == Favorites.CONTAINER_HOTSEAT) {
3806                    cellX = hotseat.getCellXFromOrder((int) info.screenId);
3807                    cellY = hotseat.getCellYFromOrder((int) info.screenId);
3808                }
3809                LauncherModel.addItemToDatabase(mLauncher, info, container, screenId, cellX, cellY);
3810            }
3811            if (v instanceof FolderIcon) {
3812                FolderIcon fi = (FolderIcon) v;
3813                fi.getFolder().addItemLocationsInDatabase();
3814            }
3815        }
3816    }
3817
3818    @Override
3819    public float getIntrinsicIconScaleFactor() {
3820        return 1f;
3821    }
3822
3823    @Override
3824    public boolean supportsFlingToDelete() {
3825        return true;
3826    }
3827
3828    @Override
3829    public boolean supportsAppInfoDropTarget() {
3830        return false;
3831    }
3832
3833    @Override
3834    public boolean supportsDeleteDropTarget() {
3835        return true;
3836    }
3837
3838    @Override
3839    public void onFlingToDelete(DragObject d, PointF vec) {
3840        // Do nothing
3841    }
3842
3843    @Override
3844    public void onFlingToDeleteCompleted() {
3845        // Do nothing
3846    }
3847
3848    public boolean isDropEnabled() {
3849        return true;
3850    }
3851
3852    @Override
3853    protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
3854        // We don't dispatch restoreInstanceState to our children using this code path.
3855        // Some pages will be restored immediately as their items are bound immediately, and
3856        // others we will need to wait until after their items are bound.
3857        mSavedStates = container;
3858    }
3859
3860    public void restoreInstanceStateForChild(int child) {
3861        if (mSavedStates != null) {
3862            mRestoredPages.add(child);
3863            CellLayout cl = (CellLayout) getChildAt(child);
3864            if (cl != null) {
3865                cl.restoreInstanceState(mSavedStates);
3866            }
3867        }
3868    }
3869
3870    public void restoreInstanceStateForRemainingPages() {
3871        int count = getChildCount();
3872        for (int i = 0; i < count; i++) {
3873            if (!mRestoredPages.contains(i)) {
3874                restoreInstanceStateForChild(i);
3875            }
3876        }
3877        mRestoredPages.clear();
3878        mSavedStates = null;
3879    }
3880
3881    @Override
3882    public void scrollLeft() {
3883        if (!workspaceInModalState() && !mIsSwitchingState) {
3884            super.scrollLeft();
3885        }
3886        Folder openFolder = getOpenFolder();
3887        if (openFolder != null) {
3888            openFolder.completeDragExit();
3889        }
3890    }
3891
3892    @Override
3893    public void scrollRight() {
3894        if (!workspaceInModalState() && !mIsSwitchingState) {
3895            super.scrollRight();
3896        }
3897        Folder openFolder = getOpenFolder();
3898        if (openFolder != null) {
3899            openFolder.completeDragExit();
3900        }
3901    }
3902
3903    @Override
3904    public boolean onEnterScrollArea(int x, int y, int direction) {
3905        // Ignore the scroll area if we are dragging over the hot seat
3906        boolean isPortrait = !mLauncher.getDeviceProfile().isLandscape;
3907        if (mLauncher.getHotseat() != null && isPortrait) {
3908            Rect r = new Rect();
3909            mLauncher.getHotseat().getHitRect(r);
3910            if (r.contains(x, y)) {
3911                return false;
3912            }
3913        }
3914
3915        boolean result = false;
3916        if (!workspaceInModalState() && !mIsSwitchingState && getOpenFolder() == null) {
3917            mInScrollArea = true;
3918
3919            final int page = getNextPage() +
3920                       (direction == DragController.SCROLL_LEFT ? -1 : 1);
3921            // We always want to exit the current layout to ensure parity of enter / exit
3922            setCurrentDropLayout(null);
3923
3924            if (0 <= page && page < getChildCount()) {
3925                // Ensure that we are not dragging over to the custom content screen
3926                if (getScreenIdForPageIndex(page) == CUSTOM_CONTENT_SCREEN_ID) {
3927                    return false;
3928                }
3929
3930                CellLayout layout = (CellLayout) getChildAt(page);
3931                setCurrentDragOverlappingLayout(layout);
3932
3933                // Workspace is responsible for drawing the edge glow on adjacent pages,
3934                // so we need to redraw the workspace when this may have changed.
3935                invalidate();
3936                result = true;
3937            }
3938        }
3939        return result;
3940    }
3941
3942    @Override
3943    public boolean onExitScrollArea() {
3944        boolean result = false;
3945        if (mInScrollArea) {
3946            invalidate();
3947            CellLayout layout = getCurrentDropLayout();
3948            setCurrentDropLayout(layout);
3949            setCurrentDragOverlappingLayout(layout);
3950
3951            result = true;
3952            mInScrollArea = false;
3953        }
3954        return result;
3955    }
3956
3957    private void onResetScrollArea() {
3958        setCurrentDragOverlappingLayout(null);
3959        mInScrollArea = false;
3960    }
3961
3962    /**
3963     * Returns a specific CellLayout
3964     */
3965    CellLayout getParentCellLayoutForView(View v) {
3966        ArrayList<CellLayout> layouts = getWorkspaceAndHotseatCellLayouts();
3967        for (CellLayout layout : layouts) {
3968            if (layout.getShortcutsAndWidgets().indexOfChild(v) > -1) {
3969                return layout;
3970            }
3971        }
3972        return null;
3973    }
3974
3975    /**
3976     * Returns a list of all the CellLayouts in the workspace.
3977     */
3978    ArrayList<CellLayout> getWorkspaceAndHotseatCellLayouts() {
3979        ArrayList<CellLayout> layouts = new ArrayList<CellLayout>();
3980        int screenCount = getChildCount();
3981        for (int screen = 0; screen < screenCount; screen++) {
3982            layouts.add(((CellLayout) getChildAt(screen)));
3983        }
3984        if (mLauncher.getHotseat() != null) {
3985            layouts.add(mLauncher.getHotseat().getLayout());
3986        }
3987        return layouts;
3988    }
3989
3990    /**
3991     * We should only use this to search for specific children.  Do not use this method to modify
3992     * ShortcutsAndWidgetsContainer directly. Includes ShortcutAndWidgetContainers from
3993     * the hotseat and workspace pages
3994     */
3995    ArrayList<ShortcutAndWidgetContainer> getAllShortcutAndWidgetContainers() {
3996        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
3997                new ArrayList<ShortcutAndWidgetContainer>();
3998        int screenCount = getChildCount();
3999        for (int screen = 0; screen < screenCount; screen++) {
4000            childrenLayouts.add(((CellLayout) getChildAt(screen)).getShortcutsAndWidgets());
4001        }
4002        if (mLauncher.getHotseat() != null) {
4003            childrenLayouts.add(mLauncher.getHotseat().getLayout().getShortcutsAndWidgets());
4004        }
4005        return childrenLayouts;
4006    }
4007
4008    public Folder getFolderForTag(final Object tag) {
4009        return (Folder) getFirstMatch(new ItemOperator() {
4010
4011            @Override
4012            public boolean evaluate(ItemInfo info, View v, View parent) {
4013                return (v instanceof Folder) && (((Folder) v).getInfo() == tag)
4014                        && ((Folder) v).getInfo().opened;
4015            }
4016        });
4017    }
4018
4019    public View getViewForTag(final Object tag) {
4020        return getFirstMatch(new ItemOperator() {
4021
4022            @Override
4023            public boolean evaluate(ItemInfo info, View v, View parent) {
4024                return info == tag;
4025            }
4026        });
4027    }
4028
4029    public LauncherAppWidgetHostView getWidgetForAppWidgetId(final int appWidgetId) {
4030        return (LauncherAppWidgetHostView) getFirstMatch(new ItemOperator() {
4031
4032            @Override
4033            public boolean evaluate(ItemInfo info, View v, View parent) {
4034                return (info instanceof LauncherAppWidgetInfo) &&
4035                        ((LauncherAppWidgetInfo) info).appWidgetId == appWidgetId;
4036            }
4037        });
4038    }
4039
4040    private View getFirstMatch(final ItemOperator operator) {
4041        final View[] value = new View[1];
4042        mapOverItems(MAP_NO_RECURSE, new ItemOperator() {
4043            @Override
4044            public boolean evaluate(ItemInfo info, View v, View parent) {
4045                if (operator.evaluate(info, v, parent)) {
4046                    value[0] = v;
4047                    return true;
4048                }
4049                return false;
4050            }
4051        });
4052        return value[0];
4053    }
4054
4055    void clearDropTargets() {
4056        mapOverItems(MAP_NO_RECURSE, new ItemOperator() {
4057            @Override
4058            public boolean evaluate(ItemInfo info, View v, View parent) {
4059                if (v instanceof DropTarget) {
4060                    mDragController.removeDropTarget((DropTarget) v);
4061                }
4062                // not done, process all the shortcuts
4063                return false;
4064            }
4065        });
4066    }
4067
4068    public void disableShortcutsByPackageName(final ArrayList<String> packages,
4069            final UserHandleCompat user, final int reason) {
4070        final HashSet<String> packageNames = new HashSet<String>();
4071        packageNames.addAll(packages);
4072
4073        mapOverItems(MAP_RECURSE, new ItemOperator() {
4074            @Override
4075            public boolean evaluate(ItemInfo info, View v, View parent) {
4076                if (info instanceof ShortcutInfo && v instanceof BubbleTextView) {
4077                    ShortcutInfo shortcutInfo = (ShortcutInfo) info;
4078                    ComponentName cn = shortcutInfo.getTargetComponent();
4079                    if (user.equals(shortcutInfo.user) && cn != null
4080                            && packageNames.contains(cn.getPackageName())) {
4081                        shortcutInfo.isDisabled |= reason;
4082                        BubbleTextView shortcut = (BubbleTextView) v;
4083                        shortcut.applyFromShortcutInfo(shortcutInfo, mIconCache);
4084
4085                        if (parent != null) {
4086                            parent.invalidate();
4087                        }
4088                    }
4089                }
4090                // process all the shortcuts
4091                return false;
4092            }
4093        });
4094    }
4095
4096    // Removes ALL items that match a given package name, this is usually called when a package
4097    // has been removed and we want to remove all components (widgets, shortcuts, apps) that
4098    // belong to that package.
4099    void removeItemsByPackageName(final ArrayList<String> packages, final UserHandleCompat user) {
4100        final HashSet<String> packageNames = new HashSet<String>();
4101        packageNames.addAll(packages);
4102
4103        // Filter out all the ItemInfos that this is going to affect
4104        final HashSet<ItemInfo> infos = new HashSet<ItemInfo>();
4105        final HashSet<ComponentName> cns = new HashSet<ComponentName>();
4106        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4107        for (CellLayout layoutParent : cellLayouts) {
4108            ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4109            int childCount = layout.getChildCount();
4110            for (int i = 0; i < childCount; ++i) {
4111                View view = layout.getChildAt(i);
4112                infos.add((ItemInfo) view.getTag());
4113            }
4114        }
4115        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4116            @Override
4117            public boolean filterItem(ItemInfo parent, ItemInfo info,
4118                                      ComponentName cn) {
4119                if (packageNames.contains(cn.getPackageName())
4120                        && info.user.equals(user)) {
4121                    cns.add(cn);
4122                    return true;
4123                }
4124                return false;
4125            }
4126        };
4127        LauncherModel.filterItemInfos(infos, filter);
4128
4129        // Remove the affected components
4130        removeItemsByComponentName(cns, user);
4131    }
4132
4133    /**
4134     * Removes items that match the item info specified. When applications are removed
4135     * as a part of an update, this is called to ensure that other widgets and application
4136     * shortcuts are not removed.
4137     */
4138    void removeItemsByComponentName(final HashSet<ComponentName> componentNames,
4139            final UserHandleCompat user) {
4140        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4141        for (final CellLayout layoutParent: cellLayouts) {
4142            final ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4143
4144            final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
4145            for (int j = 0; j < layout.getChildCount(); j++) {
4146                final View view = layout.getChildAt(j);
4147                children.put((ItemInfo) view.getTag(), view);
4148            }
4149
4150            final ArrayList<View> childrenToRemove = new ArrayList<View>();
4151            final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove =
4152                    new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
4153            LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4154                @Override
4155                public boolean filterItem(ItemInfo parent, ItemInfo info,
4156                                          ComponentName cn) {
4157                    if (parent instanceof FolderInfo) {
4158                        if (componentNames.contains(cn) && info.user.equals(user)) {
4159                            FolderInfo folder = (FolderInfo) parent;
4160                            ArrayList<ShortcutInfo> appsToRemove;
4161                            if (folderAppsToRemove.containsKey(folder)) {
4162                                appsToRemove = folderAppsToRemove.get(folder);
4163                            } else {
4164                                appsToRemove = new ArrayList<ShortcutInfo>();
4165                                folderAppsToRemove.put(folder, appsToRemove);
4166                            }
4167                            appsToRemove.add((ShortcutInfo) info);
4168                            return true;
4169                        }
4170                    } else {
4171                        if (componentNames.contains(cn) && info.user.equals(user)) {
4172                            childrenToRemove.add(children.get(info));
4173                            return true;
4174                        }
4175                    }
4176                    return false;
4177                }
4178            };
4179            LauncherModel.filterItemInfos(children.keySet(), filter);
4180
4181            // Remove all the apps from their folders
4182            for (FolderInfo folder : folderAppsToRemove.keySet()) {
4183                ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
4184                for (ShortcutInfo info : appsToRemove) {
4185                    folder.remove(info);
4186                }
4187            }
4188
4189            // Remove all the other children
4190            for (View child : childrenToRemove) {
4191                // Note: We can not remove the view directly from CellLayoutChildren as this
4192                // does not re-mark the spaces as unoccupied.
4193                layoutParent.removeViewInLayout(child);
4194                if (child instanceof DropTarget) {
4195                    mDragController.removeDropTarget((DropTarget) child);
4196                }
4197            }
4198
4199            if (childrenToRemove.size() > 0) {
4200                layout.requestLayout();
4201                layout.invalidate();
4202            }
4203        }
4204
4205        // Strip all the empty screens
4206        stripEmptyScreens();
4207    }
4208
4209    interface ItemOperator {
4210        /**
4211         * Process the next itemInfo, possibly with side-effect on {@link ItemOperator#value}.
4212         *
4213         * @param info info for the shortcut
4214         * @param view view for the shortcut
4215         * @param parent containing folder, or null
4216         * @return true if done, false to continue the map
4217         */
4218        public boolean evaluate(ItemInfo info, View view, View parent);
4219    }
4220
4221    /**
4222     * Map the operator over the shortcuts and widgets, return the first-non-null value.
4223     *
4224     * @param recurse true: iterate over folder children. false: op get the folders themselves.
4225     * @param op the operator to map over the shortcuts
4226     */
4227    void mapOverItems(boolean recurse, ItemOperator op) {
4228        ArrayList<ShortcutAndWidgetContainer> containers = getAllShortcutAndWidgetContainers();
4229        final int containerCount = containers.size();
4230        for (int containerIdx = 0; containerIdx < containerCount; containerIdx++) {
4231            ShortcutAndWidgetContainer container = containers.get(containerIdx);
4232            // map over all the shortcuts on the workspace
4233            final int itemCount = container.getChildCount();
4234            for (int itemIdx = 0; itemIdx < itemCount; itemIdx++) {
4235                View item = container.getChildAt(itemIdx);
4236                ItemInfo info = (ItemInfo) item.getTag();
4237                if (recurse && info instanceof FolderInfo && item instanceof FolderIcon) {
4238                    FolderIcon folder = (FolderIcon) item;
4239                    ArrayList<View> folderChildren = folder.getFolder().getItemsInReadingOrder();
4240                    // map over all the children in the folder
4241                    final int childCount = folderChildren.size();
4242                    for (int childIdx = 0; childIdx < childCount; childIdx++) {
4243                        View child = folderChildren.get(childIdx);
4244                        info = (ItemInfo) child.getTag();
4245                        if (op.evaluate(info, child, folder)) {
4246                            return;
4247                        }
4248                    }
4249                } else {
4250                    if (op.evaluate(info, item, null)) {
4251                        return;
4252                    }
4253                }
4254            }
4255        }
4256    }
4257
4258    void updateShortcuts(ArrayList<ShortcutInfo> shortcuts) {
4259        final HashSet<ShortcutInfo> updates = new HashSet<ShortcutInfo>(shortcuts);
4260        mapOverItems(MAP_RECURSE, new ItemOperator() {
4261            @Override
4262            public boolean evaluate(ItemInfo info, View v, View parent) {
4263                if (info instanceof ShortcutInfo && v instanceof BubbleTextView &&
4264                        updates.contains(info)) {
4265                    ShortcutInfo si = (ShortcutInfo) info;
4266                    BubbleTextView shortcut = (BubbleTextView) v;
4267                    boolean oldPromiseState = getTextViewIcon(shortcut)
4268                            instanceof PreloadIconDrawable;
4269                    shortcut.applyFromShortcutInfo(si, mIconCache,
4270                            si.isPromise() != oldPromiseState);
4271
4272                    if (parent != null) {
4273                        parent.invalidate();
4274                    }
4275                }
4276                // process all the shortcuts
4277                return false;
4278            }
4279        });
4280    }
4281
4282    public void removeAbandonedPromise(String packageName, UserHandleCompat user) {
4283        ArrayList<String> packages = new ArrayList<String>(1);
4284        packages.add(packageName);
4285        LauncherModel.deletePackageFromDatabase(mLauncher, packageName, user);
4286        removeItemsByPackageName(packages, user);
4287    }
4288
4289    public void updateRestoreItems(final HashSet<ItemInfo> updates) {
4290        mapOverItems(MAP_RECURSE, new ItemOperator() {
4291            @Override
4292            public boolean evaluate(ItemInfo info, View v, View parent) {
4293                if (info instanceof ShortcutInfo && v instanceof BubbleTextView
4294                        && updates.contains(info)) {
4295                    ((BubbleTextView) v).applyState(false);
4296                } else if (v instanceof PendingAppWidgetHostView
4297                        && info instanceof LauncherAppWidgetInfo
4298                        && updates.contains(info)) {
4299                    ((PendingAppWidgetHostView) v).applyState();
4300                }
4301                // process all the shortcuts
4302                return false;
4303            }
4304        });
4305    }
4306
4307    void widgetsRestored(ArrayList<LauncherAppWidgetInfo> changedInfo) {
4308        if (!changedInfo.isEmpty()) {
4309            DeferredWidgetRefresh widgetRefresh = new DeferredWidgetRefresh(changedInfo,
4310                    mLauncher.getAppWidgetHost());
4311            if (LauncherModel.getProviderInfo(getContext(),
4312                    changedInfo.get(0).providerName,
4313                    changedInfo.get(0).user) != null) {
4314                // Re-inflate the widgets which have changed status
4315                widgetRefresh.run();
4316            } else {
4317                // widgetRefresh will automatically run when the packages are updated.
4318                // For now just update the progress bars
4319                for (LauncherAppWidgetInfo info : changedInfo) {
4320                    if (info.hostView instanceof PendingAppWidgetHostView) {
4321                        info.installProgress = 100;
4322                        ((PendingAppWidgetHostView) info.hostView).applyState();
4323                    }
4324                }
4325            }
4326        }
4327    }
4328
4329    private void moveToScreen(int page, boolean animate) {
4330        if (!workspaceInModalState()) {
4331            if (animate) {
4332                snapToPage(page);
4333            } else {
4334                setCurrentPage(page);
4335            }
4336        }
4337        View child = getChildAt(page);
4338        if (child != null) {
4339            child.requestFocus();
4340        }
4341    }
4342
4343    void moveToDefaultScreen(boolean animate) {
4344        moveToScreen(mDefaultPage, animate);
4345    }
4346
4347    void moveToCustomContentScreen(boolean animate) {
4348        if (hasCustomContent()) {
4349            int ccIndex = getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID);
4350            if (animate) {
4351                snapToPage(ccIndex);
4352            } else {
4353                setCurrentPage(ccIndex);
4354            }
4355            View child = getChildAt(ccIndex);
4356            if (child != null) {
4357                child.requestFocus();
4358            }
4359         }
4360        exitWidgetResizeMode();
4361    }
4362
4363    @Override
4364    protected PageIndicator.PageMarkerResources getPageIndicatorMarker(int pageIndex) {
4365        long screenId = getScreenIdForPageIndex(pageIndex);
4366        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
4367            int count = mScreenOrder.size() - numCustomPages();
4368            if (count > 1) {
4369                return new PageIndicator.PageMarkerResources(R.drawable.ic_pageindicator_current,
4370                        R.drawable.ic_pageindicator_add);
4371            }
4372        }
4373
4374        return super.getPageIndicatorMarker(pageIndex);
4375    }
4376
4377    protected String getPageIndicatorDescription() {
4378        String settings = getResources().getString(R.string.settings_button_text);
4379        return getCurrentPageDescription() + ", " + settings;
4380    }
4381
4382    protected String getCurrentPageDescription() {
4383        if (hasCustomContent() && getNextPage() == 0) {
4384            return mCustomContentDescription;
4385        }
4386        int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
4387        return getPageDescription(page);
4388    }
4389
4390    private String getPageDescription(int page) {
4391        int delta = numCustomPages();
4392        return String.format(getContext().getString(R.string.workspace_scroll_format),
4393                page + 1 - delta, getChildCount() - delta);
4394    }
4395
4396    public void getLocationInDragLayer(int[] loc) {
4397        mLauncher.getDragLayer().getLocationInDragLayer(this, loc);
4398    }
4399
4400    @Override
4401    public void fillInLaunchSourceData(Bundle sourceData) {
4402        sourceData.putString(Stats.SOURCE_EXTRA_CONTAINER, Stats.CONTAINER_HOMESCREEN);
4403        sourceData.putInt(Stats.SOURCE_EXTRA_CONTAINER_PAGE, getCurrentPage());
4404    }
4405
4406    /**
4407     * Used as a workaround to ensure that the AppWidgetService receives the
4408     * PACKAGE_ADDED broadcast before updating widgets.
4409     */
4410    private class DeferredWidgetRefresh implements Runnable {
4411        private final ArrayList<LauncherAppWidgetInfo> mInfos;
4412        private final LauncherAppWidgetHost mHost;
4413        private final Handler mHandler;
4414
4415        private boolean mRefreshPending;
4416
4417        public DeferredWidgetRefresh(ArrayList<LauncherAppWidgetInfo> infos,
4418                LauncherAppWidgetHost host) {
4419            mInfos = infos;
4420            mHost = host;
4421            mHandler = new Handler();
4422            mRefreshPending = true;
4423
4424            mHost.addProviderChangeListener(this);
4425            // Force refresh after 10 seconds, if we don't get the provider changed event.
4426            // This could happen when the provider is no longer available in the app.
4427            mHandler.postDelayed(this, 10000);
4428        }
4429
4430        @Override
4431        public void run() {
4432            mHost.removeProviderChangeListener(this);
4433            mHandler.removeCallbacks(this);
4434
4435            if (!mRefreshPending) {
4436                return;
4437            }
4438
4439            mRefreshPending = false;
4440
4441            for (LauncherAppWidgetInfo info : mInfos) {
4442                if (info.hostView instanceof PendingAppWidgetHostView) {
4443                    PendingAppWidgetHostView view = (PendingAppWidgetHostView) info.hostView;
4444                    mLauncher.removeAppWidget(info);
4445
4446                    CellLayout cl = (CellLayout) view.getParent().getParent();
4447                    // Remove the current widget
4448                    cl.removeView(view);
4449                    mLauncher.bindAppWidget(info);
4450                }
4451            }
4452        }
4453    }
4454}
4455