Workspace.java revision 410f3cdfb4a8c2cf82749a3e73201fb7930540ae 
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.AnimatorSet;
22import android.animation.LayoutTransition;
23import android.animation.ObjectAnimator;
24import android.animation.TimeInterpolator;
25import android.animation.ValueAnimator;
26import android.animation.ValueAnimator.AnimatorUpdateListener;
27import android.app.WallpaperManager;
28import android.appwidget.AppWidgetHostView;
29import android.appwidget.AppWidgetProviderInfo;
30import android.content.ComponentName;
31import android.content.Context;
32import android.content.Intent;
33import android.content.SharedPreferences;
34import android.content.res.Resources;
35import android.content.res.TypedArray;
36import android.graphics.Bitmap;
37import android.graphics.Canvas;
38import android.graphics.Matrix;
39import android.graphics.Point;
40import android.graphics.PointF;
41import android.graphics.Rect;
42import android.graphics.Region.Op;
43import android.graphics.drawable.Drawable;
44import android.net.Uri;
45import android.os.IBinder;
46import android.os.Parcelable;
47import android.util.AttributeSet;
48import android.util.Log;
49import android.util.SparseArray;
50import android.view.Choreographer;
51import android.view.Display;
52import android.view.MotionEvent;
53import android.view.View;
54import android.view.ViewGroup;
55import android.view.animation.DecelerateInterpolator;
56import android.view.animation.Interpolator;
57import android.widget.TextView;
58
59import com.android.launcher3.FolderIcon.FolderRingAnimator;
60import com.android.launcher3.Launcher.CustomContentCallbacks;
61import com.android.launcher3.LauncherSettings.Favorites;
62
63import java.util.ArrayList;
64import java.util.HashMap;
65import java.util.HashSet;
66import java.util.Iterator;
67
68/**
69 * The workspace is a wide area with a wallpaper and a finite number of pages.
70 * Each page contains a number of icons, folders or widgets the user can
71 * interact with. A workspace is meant to be used with a fixed width only.
72 */
73public class Workspace extends SmoothPagedView
74        implements DropTarget, DragSource, DragScroller, View.OnTouchListener,
75        DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener,
76        Insettable {
77    private static final String TAG = "Launcher.Workspace";
78
79    // Y rotation to apply to the workspace screens
80    private static final float WORKSPACE_OVERSCROLL_ROTATION = 24f;
81
82    private static final int CHILDREN_OUTLINE_FADE_OUT_DELAY = 0;
83    private static final int CHILDREN_OUTLINE_FADE_OUT_DURATION = 375;
84    private static final int CHILDREN_OUTLINE_FADE_IN_DURATION = 100;
85
86    private static final int BACKGROUND_FADE_OUT_DURATION = 350;
87    private static final int ADJACENT_SCREEN_DROP_DURATION = 300;
88    private static final int FLING_THRESHOLD_VELOCITY = 500;
89
90    private static final float ALPHA_CUTOFF_THRESHOLD = 0.01f;
91
92    // These animators are used to fade the children's outlines
93    private ObjectAnimator mChildrenOutlineFadeInAnimation;
94    private ObjectAnimator mChildrenOutlineFadeOutAnimation;
95    private float mChildrenOutlineAlpha = 0;
96
97    // These properties refer to the background protection gradient used for AllApps and Customize
98    private ValueAnimator mBackgroundFadeInAnimation;
99    private ValueAnimator mBackgroundFadeOutAnimation;
100    private Drawable mBackground;
101    boolean mDrawBackground = true;
102    private float mBackgroundAlpha = 0;
103
104    private static final long CUSTOM_CONTENT_GESTURE_DELAY = 200;
105    private long mTouchDownTime = -1;
106    private long mCustomContentShowTime = -1;
107
108    private LayoutTransition mLayoutTransition;
109    private final WallpaperManager mWallpaperManager;
110    private IBinder mWindowToken;
111
112    private int mOriginalDefaultPage;
113    private int mDefaultPage;
114
115    private ShortcutAndWidgetContainer mDragSourceInternal;
116
117    // The screen id used for the empty screen always present to the right.
118    private final static long EXTRA_EMPTY_SCREEN_ID = -201;
119    private final static long CUSTOM_CONTENT_SCREEN_ID = -301;
120
121    private HashMap<Long, CellLayout> mWorkspaceScreens = new HashMap<Long, CellLayout>();
122    private ArrayList<Long> mScreenOrder = new ArrayList<Long>();
123
124    /**
125     * CellInfo for the cell that is currently being dragged
126     */
127    private CellLayout.CellInfo mDragInfo;
128
129    /**
130     * Target drop area calculated during last acceptDrop call.
131     */
132    private int[] mTargetCell = new int[2];
133    private int mDragOverX = -1;
134    private int mDragOverY = -1;
135
136    static Rect mLandscapeCellLayoutMetrics = null;
137    static Rect mPortraitCellLayoutMetrics = null;
138
139    CustomContentCallbacks mCustomContentCallbacks;
140    boolean mCustomContentShowing;
141    private float mLastCustomContentScrollProgress = -1f;
142
143    /**
144     * The CellLayout that is currently being dragged over
145     */
146    private CellLayout mDragTargetLayout = null;
147    /**
148     * The CellLayout that we will show as glowing
149     */
150    private CellLayout mDragOverlappingLayout = null;
151
152    /**
153     * The CellLayout which will be dropped to
154     */
155    private CellLayout mDropToLayout = null;
156
157    private Launcher mLauncher;
158    private IconCache mIconCache;
159    private DragController mDragController;
160
161    // These are temporary variables to prevent having to allocate a new object just to
162    // return an (x, y) value from helper functions. Do NOT use them to maintain other state.
163    private int[] mTempCell = new int[2];
164    private int[] mTempPt = new int[2];
165    private int[] mTempEstimate = new int[2];
166    private float[] mDragViewVisualCenter = new float[2];
167    private float[] mTempCellLayoutCenterCoordinates = new float[2];
168    private Matrix mTempInverseMatrix = new Matrix();
169
170    private SpringLoadedDragController mSpringLoadedDragController;
171    private float mSpringLoadedShrinkFactor;
172    private float mOverviewModeShrinkFactor;
173    private int mOverviewModePageOffset;
174
175    // State variable that indicates whether the pages are small (ie when you're
176    // in all apps or customize mode)
177
178    enum State { NORMAL, SPRING_LOADED, SMALL, OVERVIEW};
179    private State mState = State.NORMAL;
180    private boolean mIsSwitchingState = false;
181
182    boolean mAnimatingViewIntoPlace = false;
183    boolean mIsDragOccuring = false;
184    boolean mChildrenLayersEnabled = true;
185
186    private boolean mStripScreensOnPageStopMoving = false;
187
188    /** Is the user is dragging an item near the edge of a page? */
189    private boolean mInScrollArea = false;
190
191    private HolographicOutlineHelper mOutlineHelper;
192    private Bitmap mDragOutline = null;
193    private final Rect mTempRect = new Rect();
194    private final int[] mTempXY = new int[2];
195    private int[] mTempVisiblePagesRange = new int[2];
196    private boolean mOverscrollTransformsSet;
197    public static final int DRAG_BITMAP_PADDING = 2;
198    private boolean mWorkspaceFadeInAdjacentScreens;
199
200    WallpaperOffsetInterpolator mWallpaperOffset;
201    private Runnable mDelayedResizeRunnable;
202    private Runnable mDelayedSnapToPageRunnable;
203    private Point mDisplaySize = new Point();
204    private int mCameraDistance;
205
206    // Variables relating to the creation of user folders by hovering shortcuts over shortcuts
207    private static final int FOLDER_CREATION_TIMEOUT = 0;
208    private static final int REORDER_TIMEOUT = 250;
209    private final Alarm mFolderCreationAlarm = new Alarm();
210    private final Alarm mReorderAlarm = new Alarm();
211    private FolderRingAnimator mDragFolderRingAnimator = null;
212    private FolderIcon mDragOverFolderIcon = null;
213    private boolean mCreateUserFolderOnDrop = false;
214    private boolean mAddToExistingFolderOnDrop = false;
215    private DropTarget.DragEnforcer mDragEnforcer;
216    private float mMaxDistanceForFolderCreation;
217
218    // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
219    private float mXDown;
220    private float mYDown;
221    final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
222    final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
223    final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
224
225    // Relating to the animation of items being dropped externally
226    public static final int ANIMATE_INTO_POSITION_AND_DISAPPEAR = 0;
227    public static final int ANIMATE_INTO_POSITION_AND_REMAIN = 1;
228    public static final int ANIMATE_INTO_POSITION_AND_RESIZE = 2;
229    public static final int COMPLETE_TWO_STAGE_WIDGET_DROP_ANIMATION = 3;
230    public static final int CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION = 4;
231
232    // Related to dragging, folder creation and reordering
233    private static final int DRAG_MODE_NONE = 0;
234    private static final int DRAG_MODE_CREATE_FOLDER = 1;
235    private static final int DRAG_MODE_ADD_TO_FOLDER = 2;
236    private static final int DRAG_MODE_REORDER = 3;
237    private int mDragMode = DRAG_MODE_NONE;
238    private int mLastReorderX = -1;
239    private int mLastReorderY = -1;
240
241    private SparseArray<Parcelable> mSavedStates;
242    private final ArrayList<Integer> mRestoredPages = new ArrayList<Integer>();
243
244    // These variables are used for storing the initial and final values during workspace animations
245    private int mSavedScrollX;
246    private float mSavedRotationY;
247    private float mSavedTranslationX;
248
249    private float mCurrentScale;
250    private float mNewScale;
251    private float[] mOldBackgroundAlphas;
252    private float[] mOldAlphas;
253    private float[] mNewBackgroundAlphas;
254    private float[] mNewAlphas;
255    private int mLastChildCount = -1;
256    private float mTransitionProgress;
257
258    private Runnable mDeferredAction;
259    private boolean mDeferDropAfterUninstall;
260    private boolean mUninstallSuccessful;
261
262    private final Runnable mBindPages = new Runnable() {
263        @Override
264        public void run() {
265            mLauncher.getModel().bindRemainingSynchronousPages();
266        }
267    };
268
269    /**
270     * Used to inflate the Workspace from XML.
271     *
272     * @param context The application's context.
273     * @param attrs The attributes set containing the Workspace's customization values.
274     */
275    public Workspace(Context context, AttributeSet attrs) {
276        this(context, attrs, 0);
277    }
278
279    /**
280     * Used to inflate the Workspace from XML.
281     *
282     * @param context The application's context.
283     * @param attrs The attributes set containing the Workspace's customization values.
284     * @param defStyle Unused.
285     */
286    public Workspace(Context context, AttributeSet attrs, int defStyle) {
287        super(context, attrs, defStyle);
288        mContentIsRefreshable = false;
289
290        mOutlineHelper = HolographicOutlineHelper.obtain(context);
291
292        mDragEnforcer = new DropTarget.DragEnforcer(context);
293        // With workspace, data is available straight from the get-go
294        setDataIsReady();
295
296        mLauncher = (Launcher) context;
297        final Resources res = getResources();
298        mWorkspaceFadeInAdjacentScreens = res.getBoolean(R.bool.config_workspaceFadeAdjacentScreens);
299        mFadeInAdjacentScreens = false;
300        mWallpaperManager = WallpaperManager.getInstance(context);
301
302        TypedArray a = context.obtainStyledAttributes(attrs,
303                R.styleable.Workspace, defStyle, 0);
304        mSpringLoadedShrinkFactor =
305            res.getInteger(R.integer.config_workspaceSpringLoadShrinkPercentage) / 100.0f;
306        mOverviewModeShrinkFactor =
307                res.getInteger(R.integer.config_workspaceOverviewShrinkPercentage) / 100.0f;
308        mOverviewModePageOffset = res.getDimensionPixelSize(R.dimen.overview_mode_page_offset);
309        mCameraDistance = res.getInteger(R.integer.config_cameraDistance);
310        mOriginalDefaultPage = mDefaultPage = a.getInt(R.styleable.Workspace_defaultScreen, 1);
311        a.recycle();
312
313        setOnHierarchyChangeListener(this);
314        setHapticFeedbackEnabled(false);
315
316        initWorkspace();
317
318        // Disable multitouch across the workspace/all apps/customize tray
319        setMotionEventSplittingEnabled(true);
320
321        // Unless otherwise specified this view is important for accessibility.
322        if (getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
323            setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
324        }
325    }
326
327    @Override
328    public void setInsets(Rect insets) {
329        mInsets.set(insets);
330    }
331
332    // estimate the size of a widget with spans hSpan, vSpan. return MAX_VALUE for each
333    // dimension if unsuccessful
334    public int[] estimateItemSize(int hSpan, int vSpan,
335            ItemInfo itemInfo, boolean springLoaded) {
336        int[] size = new int[2];
337        if (getChildCount() > 0) {
338            CellLayout cl = (CellLayout) mLauncher.getWorkspace().getChildAt(0);
339            Rect r = estimateItemPosition(cl, itemInfo, 0, 0, hSpan, vSpan);
340            size[0] = r.width();
341            size[1] = r.height();
342            if (springLoaded) {
343                size[0] *= mSpringLoadedShrinkFactor;
344                size[1] *= mSpringLoadedShrinkFactor;
345            }
346            return size;
347        } else {
348            size[0] = Integer.MAX_VALUE;
349            size[1] = Integer.MAX_VALUE;
350            return size;
351        }
352    }
353
354    public Rect estimateItemPosition(CellLayout cl, ItemInfo pendingInfo,
355            int hCell, int vCell, int hSpan, int vSpan) {
356        Rect r = new Rect();
357        cl.cellToRect(hCell, vCell, hSpan, vSpan, r);
358        return r;
359    }
360
361    public void onDragStart(final DragSource source, Object info, int dragAction) {
362        mIsDragOccuring = true;
363        updateChildrenLayersEnabled(false);
364        mLauncher.lockScreenOrientation();
365        mLauncher.onInteractionBegin();
366        setChildrenBackgroundAlphaMultipliers(1f);
367        // Prevent any Un/InstallShortcutReceivers from updating the db while we are dragging
368        InstallShortcutReceiver.enableInstallQueue();
369        UninstallShortcutReceiver.enableUninstallQueue();
370        post(new Runnable() {
371            @Override
372            public void run() {
373                if (mIsDragOccuring) {
374                    addExtraEmptyScreenOnDrag();
375                }
376            }
377        });
378    }
379
380    public void onDragEnd() {
381        mIsDragOccuring = false;
382        updateChildrenLayersEnabled(false);
383        mLauncher.unlockScreenOrientation(false);
384
385        // Re-enable any Un/InstallShortcutReceiver and now process any queued items
386        InstallShortcutReceiver.disableAndFlushInstallQueue(getContext());
387        UninstallShortcutReceiver.disableAndFlushUninstallQueue(getContext());
388
389        removeExtraEmptyScreen();
390        mDragSourceInternal = null;
391        mLauncher.onInteractionEnd();
392    }
393
394    /**
395     * Initializes various states for this workspace.
396     */
397    protected void initWorkspace() {
398        Context context = getContext();
399        mCurrentPage = mDefaultPage;
400        Launcher.setScreen(mCurrentPage);
401        LauncherAppState app = LauncherAppState.getInstance();
402        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
403        mIconCache = app.getIconCache();
404        setWillNotDraw(false);
405        setClipChildren(false);
406        setClipToPadding(false);
407        setChildrenDrawnWithCacheEnabled(true);
408
409        // This is a bit of a hack to account for the fact that we translate the workspace
410        // up a bit, and still need to draw the background covering the whole screen.
411        setMinScale(mOverviewModeShrinkFactor - 0.2f);
412        setupLayoutTransition();
413
414        final Resources res = getResources();
415        try {
416            mBackground = res.getDrawable(R.drawable.apps_customize_bg);
417        } catch (Resources.NotFoundException e) {
418            // In this case, we will skip drawing background protection
419        }
420
421        mWallpaperOffset = new WallpaperOffsetInterpolator();
422        Display display = mLauncher.getWindowManager().getDefaultDisplay();
423        display.getSize(mDisplaySize);
424
425        mMaxDistanceForFolderCreation = (0.55f * grid.iconSizePx);
426        mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity);
427    }
428
429    private void setupLayoutTransition() {
430        // We want to show layout transitions when pages are deleted, to close the gap.
431        mLayoutTransition = new LayoutTransition();
432        mLayoutTransition.enableTransitionType(LayoutTransition.DISAPPEARING);
433        mLayoutTransition.enableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
434        mLayoutTransition.disableTransitionType(LayoutTransition.APPEARING);
435        mLayoutTransition.disableTransitionType(LayoutTransition.CHANGE_APPEARING);
436        setLayoutTransition(mLayoutTransition);
437    }
438
439    @Override
440    protected int getScrollMode() {
441        return SmoothPagedView.X_LARGE_MODE;
442    }
443
444    @Override
445    public void onChildViewAdded(View parent, View child) {
446        if (!(child instanceof CellLayout)) {
447            throw new IllegalArgumentException("A Workspace can only have CellLayout children.");
448        }
449        CellLayout cl = ((CellLayout) child);
450        cl.setOnInterceptTouchListener(this);
451        cl.setClickable(true);
452        cl.setContentDescription(getContext().getString(
453                R.string.workspace_description_format, getChildCount()));
454
455        super.onChildViewAdded(parent, child);
456    }
457
458    protected boolean shouldDrawChild(View child) {
459        final CellLayout cl = (CellLayout) child;
460        return super.shouldDrawChild(child) &&
461            (cl.getShortcutsAndWidgets().getAlpha() > 0 ||
462             cl.getBackgroundAlpha() > 0);
463    }
464
465    /**
466     * @return The open folder on the current screen, or null if there is none
467     */
468    Folder getOpenFolder() {
469        DragLayer dragLayer = mLauncher.getDragLayer();
470        int count = dragLayer.getChildCount();
471        for (int i = 0; i < count; i++) {
472            View child = dragLayer.getChildAt(i);
473            if (child instanceof Folder) {
474                Folder folder = (Folder) child;
475                if (folder.getInfo().opened)
476                    return folder;
477            }
478        }
479        return null;
480    }
481
482    boolean isTouchActive() {
483        return mTouchState != TOUCH_STATE_REST;
484    }
485
486    public void removeAllWorkspaceScreens() {
487        // Remove the pages and clear the screen models
488        removeAllViews();
489        mScreenOrder.clear();
490        mWorkspaceScreens.clear();
491    }
492
493    public long insertNewWorkspaceScreenBeforeEmptyScreen(long screenId) {
494        // Find the index to insert this view into.  If the empty screen exists, then
495        // insert it before that.
496        int insertIndex = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
497        if (insertIndex < 0) {
498            insertIndex = mScreenOrder.size();
499        }
500        return insertNewWorkspaceScreen(screenId, insertIndex);
501    }
502
503    public long insertNewWorkspaceScreen(long screenId) {
504        return insertNewWorkspaceScreen(screenId, getChildCount());
505    }
506
507    public long insertNewWorkspaceScreen(long screenId, int insertIndex) {
508        if (mWorkspaceScreens.containsKey(screenId)) {
509            throw new RuntimeException("Screen id " + screenId + " already exists!");
510        }
511
512        CellLayout newScreen = (CellLayout)
513                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
514
515        newScreen.setOnLongClickListener(mLongClickListener);
516        newScreen.setOnClickListener(mLauncher);
517        newScreen.setSoundEffectsEnabled(false);
518        mWorkspaceScreens.put(screenId, newScreen);
519        mScreenOrder.add(insertIndex, screenId);
520        addView(newScreen, insertIndex);
521        return screenId;
522    }
523
524    public void createCustomContentPage() {
525        CellLayout customScreen = (CellLayout)
526                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
527
528        mWorkspaceScreens.put(CUSTOM_CONTENT_SCREEN_ID, customScreen);
529        mScreenOrder.add(0, CUSTOM_CONTENT_SCREEN_ID);
530
531        // We want no padding on the custom content
532        customScreen.setPadding(0, 0, 0, 0);
533
534        addFullScreenPage(customScreen);
535
536        // Ensure that the current page and default page are maintained.
537        mDefaultPage = mOriginalDefaultPage + 1;
538        setCurrentPage(getCurrentPage() + 1);
539    }
540
541    public void removeCustomContentPage() {
542        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
543        if (customScreen == null) {
544            throw new RuntimeException("Expected custom content screen to exist");
545        }
546
547        mWorkspaceScreens.remove(CUSTOM_CONTENT_SCREEN_ID);
548        mScreenOrder.remove(CUSTOM_CONTENT_SCREEN_ID);
549        removeView(customScreen);
550        mCustomContentCallbacks = null;
551
552        // Ensure that the current page and default page are maintained.
553        mDefaultPage = mOriginalDefaultPage - 1;
554        setCurrentPage(getCurrentPage() - 1);
555    }
556
557    public void addToCustomContentPage(View customContent, CustomContentCallbacks callbacks) {
558        if (getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID) < 0) {
559            throw new RuntimeException("Expected custom content screen to exist");
560        }
561
562        // Add the custom content to the full screen custom page
563        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
564        int spanX = customScreen.getCountX();
565        int spanY = customScreen.getCountY();
566        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, spanX, spanY);
567        lp.canReorder  = false;
568        lp.isFullscreen = true;
569        if (customContent instanceof Insettable) {
570            ((Insettable)customContent).setInsets(mInsets);
571        }
572        customScreen.addViewToCellLayout(customContent, 0, 0, lp, true);
573
574        mCustomContentCallbacks = callbacks;
575    }
576
577    public void addExtraEmptyScreenOnDrag() {
578        boolean lastChildOnScreen = false;
579        boolean childOnFinalScreen = false;
580
581        if (mDragSourceInternal != null) {
582            if (mDragSourceInternal.getChildCount() == 1) {
583                lastChildOnScreen = true;
584            }
585            CellLayout cl = (CellLayout) mDragSourceInternal.getParent();
586            if (indexOfChild(cl) == getChildCount() - 1) {
587                childOnFinalScreen = true;
588            }
589        }
590
591        // If this is the last item on the final screen
592        if (lastChildOnScreen && childOnFinalScreen) {
593            return;
594        }
595        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
596            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
597        }
598    }
599
600    public boolean addExtraEmptyScreen() {
601        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
602            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
603            return true;
604        }
605        return false;
606    }
607
608    public void removeExtraEmptyScreen() {
609        if (hasExtraEmptyScreen()) {
610            CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
611            mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
612            mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
613            removeView(cl);
614        }
615    }
616
617    public boolean hasExtraEmptyScreen() {
618        int nScreens = getChildCount();
619        nScreens = hasCustomContent() ? nScreens - 1 : nScreens;
620        return mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID) && nScreens > 1;
621    }
622
623    public long commitExtraEmptyScreen() {
624        int index = getPageIndexForScreenId(EXTRA_EMPTY_SCREEN_ID);
625        CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
626        mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
627        mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
628
629        long newId = LauncherAppState.getLauncherProvider().generateNewScreenId();
630        mWorkspaceScreens.put(newId, cl);
631        mScreenOrder.add(newId);
632
633        // Update the page indicator marker
634        if (getPageIndicator() != null) {
635            getPageIndicator().updateMarker(index, getPageIndicatorMarker(index));
636        }
637
638        // Update the model for the new screen
639        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
640
641        return newId;
642    }
643
644
645    public CellLayout getScreenWithId(long screenId) {
646        CellLayout layout = mWorkspaceScreens.get(screenId);
647        return layout;
648    }
649
650    public long getIdForScreen(CellLayout layout) {
651        Iterator<Long> iter = mWorkspaceScreens.keySet().iterator();
652        while (iter.hasNext()) {
653            long id = iter.next();
654            if (mWorkspaceScreens.get(id) == layout) {
655                return id;
656            }
657        }
658        return -1;
659    }
660
661    public int getPageIndexForScreenId(long screenId) {
662        return indexOfChild(mWorkspaceScreens.get(screenId));
663    }
664
665    public long getScreenIdForPageIndex(int index) {
666        if (0 <= index && index < mScreenOrder.size()) {
667            return mScreenOrder.get(index);
668        }
669        return -1;
670    }
671
672    ArrayList<Long> getScreenOrder() {
673        return mScreenOrder;
674    }
675
676    public void stripEmptyScreens() {
677        if (isPageMoving()) {
678            mStripScreensOnPageStopMoving = true;
679            return;
680        }
681
682        int currentPage = getNextPage();
683        ArrayList<Long> removeScreens = new ArrayList<Long>();
684        for (Long id: mWorkspaceScreens.keySet()) {
685            CellLayout cl = mWorkspaceScreens.get(id);
686            if (id >= 0 && cl.getShortcutsAndWidgets().getChildCount() == 0) {
687                removeScreens.add(id);
688            }
689        }
690
691        // We enforce at least one page to add new items to. In the case that we remove the last
692        // such screen, we convert the last screen to the empty screen
693        int minScreens = hasCustomContent() ? 2 : 1;
694
695        int pageShift = 0;
696        for (Long id: removeScreens) {
697            CellLayout cl = mWorkspaceScreens.get(id);
698            mWorkspaceScreens.remove(id);
699            mScreenOrder.remove(id);
700
701            if (getChildCount() > minScreens) {
702                if (indexOfChild(cl) < currentPage) {
703                    pageShift++;
704                }
705                removeView(cl);
706            } else {
707                // if this is the last non-custom content screen, convert it to the empty screen
708                mWorkspaceScreens.put(EXTRA_EMPTY_SCREEN_ID, cl);
709                mScreenOrder.add(EXTRA_EMPTY_SCREEN_ID);
710            }
711        }
712
713        if (!removeScreens.isEmpty()) {
714            // Update the model if we have changed any screens
715            mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
716        }
717
718        if (pageShift >= 0) {
719            setCurrentPage(currentPage - pageShift);
720        }
721    }
722
723    // See implementation for parameter definition.
724    void addInScreen(View child, long container, long screenId,
725            int x, int y, int spanX, int spanY) {
726        addInScreen(child, container, screenId, x, y, spanX, spanY, false, false);
727    }
728
729    // At bind time, we use the rank (screenId) to compute x and y for hotseat items.
730    // See implementation for parameter definition.
731    void addInScreenFromBind(View child, long container, long screenId, int x, int y,
732            int spanX, int spanY) {
733        addInScreen(child, container, screenId, x, y, spanX, spanY, false, true);
734    }
735
736    // See implementation for parameter definition.
737    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
738            boolean insert) {
739        addInScreen(child, container, screenId, x, y, spanX, spanY, insert, false);
740    }
741
742    /**
743     * Adds the specified child in the specified screen. The position and dimension of
744     * the child are defined by x, y, spanX and spanY.
745     *
746     * @param child The child to add in one of the workspace's screens.
747     * @param screenId The screen in which to add the child.
748     * @param x The X position of the child in the screen's grid.
749     * @param y The Y position of the child in the screen's grid.
750     * @param spanX The number of cells spanned horizontally by the child.
751     * @param spanY The number of cells spanned vertically by the child.
752     * @param insert When true, the child is inserted at the beginning of the children list.
753     * @param computeXYFromRank When true, we use the rank (stored in screenId) to compute
754     *                          the x and y position in which to place hotseat items. Otherwise
755     *                          we use the x and y position to compute the rank.
756     */
757    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
758            boolean insert, boolean computeXYFromRank) {
759        if (container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
760            if (getScreenWithId(screenId) == null) {
761                Log.e(TAG, "Skipping child, screenId " + screenId + " not found");
762                // DEBUGGING - Print out the stack trace to see where we are adding from
763                new Throwable().printStackTrace();
764                return;
765            }
766        }
767        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
768            // This should never happen
769            throw new RuntimeException("Screen id should not be EXTRA_EMPTY_SCREEN_ID");
770        }
771
772        final CellLayout layout;
773        if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
774            layout = mLauncher.getHotseat().getLayout();
775            child.setOnKeyListener(null);
776
777            // Hide folder title in the hotseat
778            if (child instanceof FolderIcon) {
779                ((FolderIcon) child).setTextVisible(false);
780            }
781
782            if (computeXYFromRank) {
783                x = mLauncher.getHotseat().getCellXFromOrder((int) screenId);
784                y = mLauncher.getHotseat().getCellYFromOrder((int) screenId);
785            } else {
786                screenId = mLauncher.getHotseat().getOrderInHotseat(x, y);
787            }
788        } else {
789            // Show folder title if not in the hotseat
790            if (child instanceof FolderIcon) {
791                ((FolderIcon) child).setTextVisible(true);
792            }
793            layout = getScreenWithId(screenId);
794            child.setOnKeyListener(new IconKeyEventListener());
795        }
796
797        ViewGroup.LayoutParams genericLp = child.getLayoutParams();
798        CellLayout.LayoutParams lp;
799        if (genericLp == null || !(genericLp instanceof CellLayout.LayoutParams)) {
800            lp = new CellLayout.LayoutParams(x, y, spanX, spanY);
801        } else {
802            lp = (CellLayout.LayoutParams) genericLp;
803            lp.cellX = x;
804            lp.cellY = y;
805            lp.cellHSpan = spanX;
806            lp.cellVSpan = spanY;
807        }
808
809        if (spanX < 0 && spanY < 0) {
810            lp.isLockedToGrid = false;
811        }
812
813        // Get the canonical child id to uniquely represent this view in this screen
814        int childId = LauncherModel.getCellLayoutChildId(container, screenId, x, y, spanX, spanY);
815        boolean markCellsAsOccupied = !(child instanceof Folder);
816        if (!layout.addViewToCellLayout(child, insert ? 0 : -1, childId, lp, markCellsAsOccupied)) {
817            // TODO: This branch occurs when the workspace is adding views
818            // outside of the defined grid
819            // maybe we should be deleting these items from the LauncherModel?
820            Launcher.addDumpLog(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout", true);
821        }
822
823        if (!(child instanceof Folder)) {
824            child.setHapticFeedbackEnabled(false);
825            child.setOnLongClickListener(mLongClickListener);
826        }
827        if (child instanceof DropTarget) {
828            mDragController.addDropTarget((DropTarget) child);
829        }
830    }
831
832    /**
833     * Called directly from a CellLayout (not by the framework), after we've been added as a
834     * listener via setOnInterceptTouchEventListener(). This allows us to tell the CellLayout
835     * that it should intercept touch events, which is not something that is normally supported.
836     */
837    @Override
838    public boolean onTouch(View v, MotionEvent event) {
839        return (isSmall() || !isFinishedSwitchingState())
840                || (!isSmall() && indexOfChild(v) != mCurrentPage);
841    }
842
843    public boolean isSwitchingState() {
844        return mIsSwitchingState;
845    }
846
847    /** This differs from isSwitchingState in that we take into account how far the transition
848     *  has completed. */
849    public boolean isFinishedSwitchingState() {
850        return !mIsSwitchingState || (mTransitionProgress > 0.5f);
851    }
852
853    protected void onWindowVisibilityChanged (int visibility) {
854        mLauncher.onWindowVisibilityChanged(visibility);
855        if (mCustomContentShowing && mCustomContentCallbacks != null) {
856            if (visibility == View.VISIBLE) {
857                mCustomContentCallbacks.onShow();
858            } else if (visibility == View.GONE) {
859                mCustomContentCallbacks.onHide();
860            }
861        }
862    }
863
864    @Override
865    public boolean dispatchUnhandledMove(View focused, int direction) {
866        if (isSmall() || !isFinishedSwitchingState()) {
867            // when the home screens are shrunken, shouldn't allow side-scrolling
868            return false;
869        }
870        return super.dispatchUnhandledMove(focused, direction);
871    }
872
873    @Override
874    public boolean onInterceptTouchEvent(MotionEvent ev) {
875        switch (ev.getAction() & MotionEvent.ACTION_MASK) {
876        case MotionEvent.ACTION_DOWN:
877            mXDown = ev.getX();
878            mYDown = ev.getY();
879            mTouchDownTime = System.currentTimeMillis();
880            break;
881        case MotionEvent.ACTION_POINTER_UP:
882        case MotionEvent.ACTION_UP:
883            if (mTouchState == TOUCH_STATE_REST) {
884                final CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage);
885                if (!currentPage.lastDownOnOccupiedCell()) {
886                    onWallpaperTap(ev);
887                }
888            }
889        }
890        return super.onInterceptTouchEvent(ev);
891    }
892
893    protected void reinflateWidgetsIfNecessary() {
894        final int clCount = getChildCount();
895        for (int i = 0; i < clCount; i++) {
896            CellLayout cl = (CellLayout) getChildAt(i);
897            ShortcutAndWidgetContainer swc = cl.getShortcutsAndWidgets();
898            final int itemCount = swc.getChildCount();
899            for (int j = 0; j < itemCount; j++) {
900                View v = swc.getChildAt(j);
901
902                if (v.getTag() instanceof LauncherAppWidgetInfo) {
903                    LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) v.getTag();
904                    LauncherAppWidgetHostView lahv = (LauncherAppWidgetHostView) info.hostView;
905                    if (lahv != null && lahv.orientationChangedSincedInflation()) {
906                        mLauncher.removeAppWidget(info);
907                        // Remove the current widget which is inflated with the wrong orientation
908                        cl.removeView(lahv);
909                        mLauncher.bindAppWidget(info);
910                    }
911                }
912            }
913        }
914    }
915
916    @Override
917    protected void determineScrollingStart(MotionEvent ev) {
918        if (!isFinishedSwitchingState()) return;
919
920        float deltaX = ev.getX() - mXDown;
921        float absDeltaX = Math.abs(deltaX);
922        float absDeltaY = Math.abs(ev.getY() - mYDown);
923
924        if (Float.compare(absDeltaX, 0f) == 0) return;
925
926        float slope = absDeltaY / absDeltaX;
927        float theta = (float) Math.atan(slope);
928
929        if (absDeltaX > mTouchSlop || absDeltaY > mTouchSlop) {
930            cancelCurrentPageLongPress();
931        }
932
933        boolean passRightSwipesToCustomContent =
934                (mTouchDownTime - mCustomContentShowTime) > CUSTOM_CONTENT_GESTURE_DELAY;
935
936        if (deltaX > 0 && getScreenIdForPageIndex(getCurrentPage()) == CUSTOM_CONTENT_SCREEN_ID
937                && passRightSwipesToCustomContent) {
938            // Pass swipes to the right to the custom content page.
939            return;
940        }
941
942        if (theta > MAX_SWIPE_ANGLE) {
943            // Above MAX_SWIPE_ANGLE, we don't want to ever start scrolling the workspace
944            return;
945        } else if (theta > START_DAMPING_TOUCH_SLOP_ANGLE) {
946            // Above START_DAMPING_TOUCH_SLOP_ANGLE and below MAX_SWIPE_ANGLE, we want to
947            // increase the touch slop to make it harder to begin scrolling the workspace. This
948            // results in vertically scrolling widgets to more easily. The higher the angle, the
949            // more we increase touch slop.
950            theta -= START_DAMPING_TOUCH_SLOP_ANGLE;
951            float extraRatio = (float)
952                    Math.sqrt((theta / (MAX_SWIPE_ANGLE - START_DAMPING_TOUCH_SLOP_ANGLE)));
953            super.determineScrollingStart(ev, 1 + TOUCH_SLOP_DAMPING_FACTOR * extraRatio);
954        } else {
955            // Below START_DAMPING_TOUCH_SLOP_ANGLE, we don't do anything special
956            super.determineScrollingStart(ev);
957        }
958    }
959
960    protected void onPageBeginMoving() {
961        super.onPageBeginMoving();
962
963        if (isHardwareAccelerated()) {
964            updateChildrenLayersEnabled(false);
965        } else {
966            if (mNextPage != INVALID_PAGE) {
967                // we're snapping to a particular screen
968                enableChildrenCache(mCurrentPage, mNextPage);
969            } else {
970                // this is when user is actively dragging a particular screen, they might
971                // swipe it either left or right (but we won't advance by more than one screen)
972                enableChildrenCache(mCurrentPage - 1, mCurrentPage + 1);
973            }
974        }
975
976        // Only show page outlines as we pan if we are on large screen
977        if (LauncherAppState.getInstance().isScreenLarge()) {
978            showOutlines();
979        }
980
981        // If we are not fading in adjacent screens, we still need to restore the alpha in case the
982        // user scrolls while we are transitioning (should not affect dispatchDraw optimizations)
983        if (!mWorkspaceFadeInAdjacentScreens) {
984            for (int i = 0; i < getChildCount(); ++i) {
985                ((CellLayout) getPageAt(i)).setShortcutAndWidgetAlpha(1f);
986            }
987        }
988    }
989
990    protected void onPageEndMoving() {
991        super.onPageEndMoving();
992
993        if (isHardwareAccelerated()) {
994            updateChildrenLayersEnabled(false);
995        } else {
996            clearChildrenCache();
997        }
998
999        if (mDragController.isDragging()) {
1000            if (isSmall()) {
1001                // If we are in springloaded mode, then force an event to check if the current touch
1002                // is under a new page (to scroll to)
1003                mDragController.forceTouchMove();
1004            }
1005        } else {
1006            // If we are not mid-dragging, hide the page outlines if we are on a large screen
1007            if (LauncherAppState.getInstance().isScreenLarge()) {
1008                hideOutlines();
1009            }
1010        }
1011
1012        if (mDelayedResizeRunnable != null) {
1013            mDelayedResizeRunnable.run();
1014            mDelayedResizeRunnable = null;
1015        }
1016
1017        if (mDelayedSnapToPageRunnable != null) {
1018            mDelayedSnapToPageRunnable.run();
1019            mDelayedSnapToPageRunnable = null;
1020        }
1021        if (mStripScreensOnPageStopMoving) {
1022            stripEmptyScreens();
1023            mStripScreensOnPageStopMoving = false;
1024        }
1025
1026        if (hasCustomContent() && getNextPage() == 0 && !mCustomContentShowing) {
1027            mCustomContentShowing = true;
1028            if (mCustomContentCallbacks != null) {
1029                mCustomContentCallbacks.onShow();
1030                mCustomContentShowTime = System.currentTimeMillis();
1031            }
1032        } else if (hasCustomContent() && getNextPage() != 0 && mCustomContentShowing) {
1033            mCustomContentShowing = false;
1034            if (mCustomContentCallbacks != null) {
1035                mCustomContentCallbacks.onHide();
1036                mLauncher.resetQSBScroll();
1037            }
1038        }
1039    }
1040
1041    @Override
1042    protected void notifyPageSwitchListener() {
1043        super.notifyPageSwitchListener();
1044        Launcher.setScreen(mCurrentPage);
1045    };
1046
1047    protected void setWallpaperDimension() {
1048        String spKey = WallpaperCropActivity.getSharedPreferencesKey();
1049        SharedPreferences sp = mLauncher.getSharedPreferences(spKey, Context.MODE_PRIVATE);
1050        WallpaperPickerActivity.suggestWallpaperDimension(mLauncher.getResources(),
1051                sp, mLauncher.getWindowManager(), mWallpaperManager);
1052    }
1053
1054    protected void snapToPage(int whichPage, Runnable r) {
1055        if (mDelayedSnapToPageRunnable != null) {
1056            mDelayedSnapToPageRunnable.run();
1057        }
1058        mDelayedSnapToPageRunnable = r;
1059        snapToPage(whichPage, SLOW_PAGE_SNAP_ANIMATION_DURATION);
1060    }
1061
1062    protected void snapToScreenId(long screenId, Runnable r) {
1063        snapToPage(getPageIndexForScreenId(screenId), r);
1064    }
1065
1066    class WallpaperOffsetInterpolator implements Choreographer.FrameCallback {
1067        float mFinalOffset = 0.0f;
1068        float mCurrentOffset = 0.5f; // to force an initial update
1069        //long mLastWallpaperOffsetUpdateTime;
1070        boolean mWaitingForUpdate;
1071        Choreographer mChoreographer;
1072        Interpolator mInterpolator;
1073        boolean mAnimating;
1074        long mAnimationStartTime;
1075        float mAnimationStartOffset;
1076        private final int ANIMATION_DURATION = 250;
1077        // Don't use all the wallpaper for parallax until you have at least this many pages
1078        private final int MIN_PARALLAX_PAGE_SPAN = 4;
1079        int mNumScreens;
1080
1081        public WallpaperOffsetInterpolator() {
1082            mChoreographer = Choreographer.getInstance();
1083            mInterpolator = new DecelerateInterpolator(1.5f);
1084        }
1085
1086        @Override
1087        public void doFrame(long frameTimeNanos) {
1088            updateOffset(false);
1089        }
1090
1091        private void updateOffset(boolean force) {
1092            if (mWaitingForUpdate || force) {
1093                mWaitingForUpdate = false;
1094                if (computeScrollOffset() && mWindowToken != null) {
1095                    try {
1096                        mWallpaperManager.setWallpaperOffsets(mWindowToken,
1097                                mWallpaperOffset.getCurrX(), 0.5f);
1098                        setWallpaperOffsetSteps();
1099                    } catch (IllegalArgumentException e) {
1100                        Log.e(TAG, "Error updating wallpaper offset: " + e);
1101                    }
1102                }
1103            }
1104        }
1105
1106        public boolean computeScrollOffset() {
1107            final float oldOffset = mCurrentOffset;
1108            if (mAnimating) {
1109                long durationSinceAnimation = System.currentTimeMillis() - mAnimationStartTime;
1110                float t0 = durationSinceAnimation / (float) ANIMATION_DURATION;
1111                float t1 = mInterpolator.getInterpolation(t0);
1112                mCurrentOffset = mAnimationStartOffset +
1113                        (mFinalOffset - mAnimationStartOffset) * t1;
1114                mAnimating = durationSinceAnimation < ANIMATION_DURATION;
1115            } else {
1116                mCurrentOffset = mFinalOffset;
1117            }
1118
1119            if (Math.abs(mCurrentOffset - mFinalOffset) > 0.0000001f) {
1120                scheduleUpdate();
1121            }
1122            if (Math.abs(oldOffset - mCurrentOffset) > 0.0000001f) {
1123                return true;
1124            }
1125            return false;
1126        }
1127
1128        private float wallpaperOffsetForCurrentScroll() {
1129            if (getChildCount() <= 1) {
1130                return 0;
1131            }
1132
1133            // Exclude the leftmost page
1134            final int firstIndex = isLayoutRtl() ? getChildCount() - 2 : 1;
1135            // Exclude the last extra empty screen (if we have > MIN_PARALLAX_PAGE_SPAN pages)
1136            int extra = numExtraScreensToIgnore();
1137            final int lastIndex = isLayoutRtl() ? 0 + extra : getChildCount() - 1 - extra;
1138
1139            int firstPageScrollX = getScrollForPage(firstIndex);
1140            int scrollRange = getScrollForPage(lastIndex) - firstPageScrollX;
1141            if (scrollRange == 0) {
1142                return 0;
1143            } else {
1144                // TODO: do different behavior if it's  a live wallpaper?
1145                float offset = Math.min(1, (getScrollX() - firstPageScrollX) / (float) scrollRange);
1146                offset = Math.max(0, offset);
1147                // Don't use up all the wallpaper parallax until you have at least
1148                // MIN_PARALLAX_PAGE_SPAN pages
1149                int numScrollingPages = getNumScreensExcludingExtraEmptyScreenAndLeftmost();
1150                int parallaxPageSpan = Math.max(MIN_PARALLAX_PAGE_SPAN, numScrollingPages) - 1;
1151                return offset * (numScrollingPages - 1) / parallaxPageSpan;
1152            }
1153        }
1154
1155        private int numExtraScreensToIgnore() {
1156            int numScrollingPages = getChildCount() - 1;
1157            if (numScrollingPages > MIN_PARALLAX_PAGE_SPAN && hasExtraEmptyScreen()) {
1158                return 1;
1159            } else {
1160                return 0;
1161            }
1162        }
1163
1164        private int getNumScreensExcludingExtraEmptyScreenAndLeftmost() {
1165            int numScrollingPages = getChildCount() - 1 - numExtraScreensToIgnore();
1166            return numScrollingPages;
1167        }
1168
1169        public void syncWithScroll() {
1170            float offset = wallpaperOffsetForCurrentScroll();
1171            mWallpaperOffset.setFinalX(offset);
1172            updateOffset(true);
1173        }
1174
1175        public float getCurrX() {
1176            return mCurrentOffset;
1177        }
1178
1179        public float getFinalX() {
1180            return mFinalOffset;
1181        }
1182
1183        private void animateToFinal() {
1184            mAnimating = true;
1185            mAnimationStartOffset = mCurrentOffset;
1186            mAnimationStartTime = System.currentTimeMillis();
1187        }
1188
1189        private void setWallpaperOffsetSteps() {
1190            // Set wallpaper offset steps (1 / (number of screens - 1))
1191            mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 1.0f);
1192        }
1193
1194        public void setFinalX(float x) {
1195            scheduleUpdate();
1196            mFinalOffset = Math.max(0f, Math.min(x, 1.0f));
1197            if (getNumScreensExcludingExtraEmptyScreenAndLeftmost() != mNumScreens) {
1198                if (mNumScreens > 0) {
1199                    // Don't animate if we're going from 0 screens
1200                    animateToFinal();
1201                }
1202                mNumScreens = getNumScreensExcludingExtraEmptyScreenAndLeftmost();
1203            }
1204        }
1205
1206        private void scheduleUpdate() {
1207            if (!mWaitingForUpdate) {
1208                mChoreographer.postFrameCallback(this);
1209                mWaitingForUpdate = true;
1210            }
1211        }
1212
1213        public void jumpToFinal() {
1214            mCurrentOffset = mFinalOffset;
1215        }
1216    }
1217
1218    @Override
1219    public void computeScroll() {
1220        super.computeScroll();
1221        mWallpaperOffset.syncWithScroll();
1222    }
1223
1224    void showOutlines() {
1225        if (!isSmall() && !mIsSwitchingState) {
1226            if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel();
1227            if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel();
1228            mChildrenOutlineFadeInAnimation = LauncherAnimUtils.ofFloat(this, "childrenOutlineAlpha", 1.0f);
1229            mChildrenOutlineFadeInAnimation.setDuration(CHILDREN_OUTLINE_FADE_IN_DURATION);
1230            mChildrenOutlineFadeInAnimation.start();
1231        }
1232    }
1233
1234    void hideOutlines() {
1235        if (!isSmall() && !mIsSwitchingState) {
1236            if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel();
1237            if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel();
1238            mChildrenOutlineFadeOutAnimation = LauncherAnimUtils.ofFloat(this, "childrenOutlineAlpha", 0.0f);
1239            mChildrenOutlineFadeOutAnimation.setDuration(CHILDREN_OUTLINE_FADE_OUT_DURATION);
1240            mChildrenOutlineFadeOutAnimation.setStartDelay(CHILDREN_OUTLINE_FADE_OUT_DELAY);
1241            mChildrenOutlineFadeOutAnimation.start();
1242        }
1243    }
1244
1245    public void showOutlinesTemporarily() {
1246        if (!mIsPageMoving && !isTouchActive()) {
1247            snapToPage(mCurrentPage);
1248        }
1249    }
1250
1251    public void setChildrenOutlineAlpha(float alpha) {
1252        mChildrenOutlineAlpha = alpha;
1253        for (int i = 0; i < getChildCount(); i++) {
1254            CellLayout cl = (CellLayout) getChildAt(i);
1255            cl.setBackgroundAlpha(alpha);
1256        }
1257    }
1258
1259    public float getChildrenOutlineAlpha() {
1260        return mChildrenOutlineAlpha;
1261    }
1262
1263    void disableBackground() {
1264        mDrawBackground = false;
1265    }
1266    void enableBackground() {
1267        mDrawBackground = true;
1268    }
1269
1270    private void animateBackgroundGradient(float finalAlpha, boolean animated) {
1271        if (mBackground == null) return;
1272        if (mBackgroundFadeInAnimation != null) {
1273            mBackgroundFadeInAnimation.cancel();
1274            mBackgroundFadeInAnimation = null;
1275        }
1276        if (mBackgroundFadeOutAnimation != null) {
1277            mBackgroundFadeOutAnimation.cancel();
1278            mBackgroundFadeOutAnimation = null;
1279        }
1280        float startAlpha = getBackgroundAlpha();
1281        if (finalAlpha != startAlpha) {
1282            if (animated) {
1283                mBackgroundFadeOutAnimation =
1284                        LauncherAnimUtils.ofFloat(this, startAlpha, finalAlpha);
1285                mBackgroundFadeOutAnimation.addUpdateListener(new AnimatorUpdateListener() {
1286                    public void onAnimationUpdate(ValueAnimator animation) {
1287                        setBackgroundAlpha(((Float) animation.getAnimatedValue()).floatValue());
1288                    }
1289                });
1290                mBackgroundFadeOutAnimation.setInterpolator(new DecelerateInterpolator(1.5f));
1291                mBackgroundFadeOutAnimation.setDuration(BACKGROUND_FADE_OUT_DURATION);
1292                mBackgroundFadeOutAnimation.start();
1293            } else {
1294                setBackgroundAlpha(finalAlpha);
1295            }
1296        }
1297    }
1298
1299    public void setBackgroundAlpha(float alpha) {
1300        if (alpha != mBackgroundAlpha) {
1301            mBackgroundAlpha = alpha;
1302            invalidate();
1303        }
1304    }
1305
1306    public float getBackgroundAlpha() {
1307        return mBackgroundAlpha;
1308    }
1309
1310    float backgroundAlphaInterpolator(float r) {
1311        float pivotA = 0.1f;
1312        float pivotB = 0.4f;
1313        if (r < pivotA) {
1314            return 0;
1315        } else if (r > pivotB) {
1316            return 1.0f;
1317        } else {
1318            return (r - pivotA)/(pivotB - pivotA);
1319        }
1320    }
1321
1322    private void updatePageAlphaValues(int screenCenter) {
1323        boolean isInOverscroll = mOverScrollX < 0 || mOverScrollX > mMaxScrollX;
1324        if (mWorkspaceFadeInAdjacentScreens &&
1325                mState == State.NORMAL &&
1326                !mIsSwitchingState &&
1327                !isInOverscroll) {
1328            for (int i = 0; i < getChildCount(); i++) {
1329                CellLayout child = (CellLayout) getChildAt(i);
1330                if (child != null) {
1331                    float scrollProgress = getScrollProgress(screenCenter, child, i);
1332                    float alpha = 1 - Math.abs(scrollProgress);
1333                    child.getShortcutsAndWidgets().setAlpha(alpha);
1334                    if (!mIsDragOccuring) {
1335                        child.setBackgroundAlphaMultiplier(
1336                                backgroundAlphaInterpolator(Math.abs(scrollProgress)));
1337                    } else {
1338                        child.setBackgroundAlphaMultiplier(1f);
1339                    }
1340                }
1341            }
1342        }
1343    }
1344
1345    private void setChildrenBackgroundAlphaMultipliers(float a) {
1346        for (int i = 0; i < getChildCount(); i++) {
1347            CellLayout child = (CellLayout) getChildAt(i);
1348            child.setBackgroundAlphaMultiplier(a);
1349        }
1350    }
1351
1352    public boolean hasCustomContent() {
1353        return (mScreenOrder.size() > 0 && mScreenOrder.get(0) == CUSTOM_CONTENT_SCREEN_ID);
1354    }
1355
1356    public boolean isOnOrMovingToCustomContent() {
1357        return hasCustomContent() && getNextPage() == 0;
1358    }
1359
1360    private void updateStateForCustomContent(int screenCenter) {
1361        float translationX = 0;
1362        float progress = 0;
1363        if (hasCustomContent()) {
1364            int index = mScreenOrder.indexOf(CUSTOM_CONTENT_SCREEN_ID);
1365            int scrollDelta = getScrollForPage(index + 1) - getScrollX();
1366            translationX = Math.max(scrollDelta, 0);
1367            progress = (1.0f * scrollDelta) /
1368                    (getScrollForPage(index + 1) - getScrollForPage(index));
1369            progress = Math.max(0, progress);
1370        }
1371
1372        if (Float.compare(progress, mLastCustomContentScrollProgress) == 0) return;
1373        mLastCustomContentScrollProgress = progress;
1374
1375        setBackgroundAlpha(progress * 0.8f);
1376
1377        if (mLauncher.getHotseat() != null) {
1378            mLauncher.getHotseat().setTranslationX(translationX);
1379        }
1380
1381        if (getPageIndicator() != null) {
1382            getPageIndicator().setTranslationX(translationX);
1383        }
1384
1385        if (mCustomContentCallbacks != null) {
1386            mCustomContentCallbacks.onScrollProgressChanged(progress);
1387        }
1388    }
1389
1390    @Override
1391    protected void screenScrolled(int screenCenter) {
1392        final boolean isRtl = isLayoutRtl();
1393        super.screenScrolled(screenCenter);
1394
1395        updatePageAlphaValues(screenCenter);
1396        updateStateForCustomContent(screenCenter);
1397        enableHwLayersOnVisiblePages();
1398
1399        if ((mOverScrollX < 0 && !hasCustomContent()) || mOverScrollX > mMaxScrollX) {
1400            int index = 0;
1401            float pivotX = 0f;
1402            final float leftBiasedPivot = 0.25f;
1403            final float rightBiasedPivot = 0.75f;
1404            final int lowerIndex = 0;
1405            final int upperIndex = getChildCount() - 1;
1406            if (isRtl) {
1407                index = mOverScrollX < 0 ? upperIndex : lowerIndex;
1408                pivotX = (index == 0 ? leftBiasedPivot : rightBiasedPivot);
1409            } else {
1410                index = mOverScrollX < 0 ? lowerIndex : upperIndex;
1411                pivotX = (index == 0 ? rightBiasedPivot : leftBiasedPivot);
1412            }
1413
1414            CellLayout cl = (CellLayout) getChildAt(index);
1415            float scrollProgress = getScrollProgress(screenCenter, cl, index);
1416            final boolean isLeftPage = (isRtl ? index > 0 : index == 0);
1417            cl.setOverScrollAmount(Math.abs(scrollProgress), isLeftPage);
1418            float rotation = -WORKSPACE_OVERSCROLL_ROTATION * scrollProgress;
1419            cl.setRotationY(rotation);
1420            if (!mOverscrollTransformsSet) {
1421                mOverscrollTransformsSet = true;
1422                cl.setCameraDistance(mDensity * mCameraDistance);
1423                cl.setPivotX(cl.getMeasuredWidth() * pivotX);
1424                cl.setPivotY(cl.getMeasuredHeight() * 0.5f);
1425                cl.setOverscrollTransformsDirty(true);
1426            }
1427        } else {
1428            if (mOverscrollTransformsSet) {
1429                mOverscrollTransformsSet = false;
1430                ((CellLayout) getChildAt(0)).resetOverscrollTransforms();
1431                ((CellLayout) getChildAt(getChildCount() - 1)).resetOverscrollTransforms();
1432            }
1433        }
1434    }
1435
1436    @Override
1437    protected void overScroll(float amount) {
1438        acceleratedOverScroll(amount);
1439    }
1440
1441    protected void onAttachedToWindow() {
1442        super.onAttachedToWindow();
1443        mWindowToken = getWindowToken();
1444        computeScroll();
1445        mDragController.setWindowToken(mWindowToken);
1446    }
1447
1448    protected void onDetachedFromWindow() {
1449        super.onDetachedFromWindow();
1450        mWindowToken = null;
1451    }
1452
1453    @Override
1454    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
1455        if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) {
1456            mWallpaperOffset.syncWithScroll();
1457            mWallpaperOffset.jumpToFinal();
1458        }
1459        super.onLayout(changed, left, top, right, bottom);
1460    }
1461
1462    @Override
1463    protected void onDraw(Canvas canvas) {
1464        // Draw the background gradient if necessary
1465        if (mBackground != null && mBackgroundAlpha > 0.0f && mDrawBackground) {
1466            int alpha = (int) (mBackgroundAlpha * 255);
1467            mBackground.setAlpha(alpha);
1468            mBackground.setBounds(getScrollX(), 0, getScrollX() + getMeasuredWidth(),
1469                    getMeasuredHeight());
1470            mBackground.draw(canvas);
1471        }
1472
1473        super.onDraw(canvas);
1474
1475        // Call back to LauncherModel to finish binding after the first draw
1476        post(mBindPages);
1477    }
1478
1479    boolean isDrawingBackgroundGradient() {
1480        return (mBackground != null && mBackgroundAlpha > 0.0f && mDrawBackground);
1481    }
1482
1483    @Override
1484    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
1485        if (!mLauncher.isAllAppsVisible()) {
1486            final Folder openFolder = getOpenFolder();
1487            if (openFolder != null) {
1488                return openFolder.requestFocus(direction, previouslyFocusedRect);
1489            } else {
1490                return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
1491            }
1492        }
1493        return false;
1494    }
1495
1496    @Override
1497    public int getDescendantFocusability() {
1498        if (isSmall()) {
1499            return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
1500        }
1501        return super.getDescendantFocusability();
1502    }
1503
1504    @Override
1505    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
1506        if (!mLauncher.isAllAppsVisible()) {
1507            final Folder openFolder = getOpenFolder();
1508            if (openFolder != null) {
1509                openFolder.addFocusables(views, direction);
1510            } else {
1511                super.addFocusables(views, direction, focusableMode);
1512            }
1513        }
1514    }
1515
1516    public boolean isSmall() {
1517        return mState == State.SMALL || mState == State.SPRING_LOADED || mState == State.OVERVIEW;
1518    }
1519
1520    void enableChildrenCache(int fromPage, int toPage) {
1521        if (fromPage > toPage) {
1522            final int temp = fromPage;
1523            fromPage = toPage;
1524            toPage = temp;
1525        }
1526
1527        final int screenCount = getChildCount();
1528
1529        fromPage = Math.max(fromPage, 0);
1530        toPage = Math.min(toPage, screenCount - 1);
1531
1532        for (int i = fromPage; i <= toPage; i++) {
1533            final CellLayout layout = (CellLayout) getChildAt(i);
1534            layout.setChildrenDrawnWithCacheEnabled(true);
1535            layout.setChildrenDrawingCacheEnabled(true);
1536        }
1537    }
1538
1539    void clearChildrenCache() {
1540        final int screenCount = getChildCount();
1541        for (int i = 0; i < screenCount; i++) {
1542            final CellLayout layout = (CellLayout) getChildAt(i);
1543            layout.setChildrenDrawnWithCacheEnabled(false);
1544            // In software mode, we don't want the items to continue to be drawn into bitmaps
1545            if (!isHardwareAccelerated()) {
1546                layout.setChildrenDrawingCacheEnabled(false);
1547            }
1548        }
1549    }
1550
1551    private void updateChildrenLayersEnabled(boolean force) {
1552        boolean small = mState == State.SMALL || mState == State.OVERVIEW || mIsSwitchingState;
1553        boolean enableChildrenLayers = force || small || mAnimatingViewIntoPlace || isPageMoving();
1554
1555        if (enableChildrenLayers != mChildrenLayersEnabled) {
1556            mChildrenLayersEnabled = enableChildrenLayers;
1557            if (mChildrenLayersEnabled) {
1558                enableHwLayersOnVisiblePages();
1559            } else {
1560                for (int i = 0; i < getPageCount(); i++) {
1561                    final CellLayout cl = (CellLayout) getChildAt(i);
1562                    cl.disableHardwareLayers();
1563                }
1564            }
1565        }
1566    }
1567
1568    private void enableHwLayersOnVisiblePages() {
1569        if (mChildrenLayersEnabled) {
1570            final int screenCount = getChildCount();
1571            getVisiblePages(mTempVisiblePagesRange);
1572            int leftScreen = mTempVisiblePagesRange[0];
1573            int rightScreen = mTempVisiblePagesRange[1];
1574            if (leftScreen == rightScreen) {
1575                // make sure we're caching at least two pages always
1576                if (rightScreen < screenCount - 1) {
1577                    rightScreen++;
1578                } else if (leftScreen > 0) {
1579                    leftScreen--;
1580                }
1581            }
1582            for (int i = 0; i < screenCount; i++) {
1583                final CellLayout layout = (CellLayout) getPageAt(i);
1584                if (!(leftScreen <= i && i <= rightScreen && shouldDrawChild(layout))) {
1585                    layout.disableHardwareLayers();
1586                }
1587            }
1588            for (int i = 0; i < screenCount; i++) {
1589                final CellLayout layout = (CellLayout) getPageAt(i);
1590                if (leftScreen <= i && i <= rightScreen && shouldDrawChild(layout)) {
1591                    layout.enableHardwareLayers();
1592                }
1593            }
1594        }
1595    }
1596
1597    public void buildPageHardwareLayers() {
1598        // force layers to be enabled just for the call to buildLayer
1599        updateChildrenLayersEnabled(true);
1600        if (getWindowToken() != null) {
1601            final int childCount = getChildCount();
1602            for (int i = 0; i < childCount; i++) {
1603                CellLayout cl = (CellLayout) getChildAt(i);
1604                cl.buildHardwareLayer();
1605            }
1606        }
1607        updateChildrenLayersEnabled(false);
1608    }
1609
1610    protected void onWallpaperTap(MotionEvent ev) {
1611        final int[] position = mTempCell;
1612        getLocationOnScreen(position);
1613
1614        int pointerIndex = ev.getActionIndex();
1615        position[0] += (int) ev.getX(pointerIndex);
1616        position[1] += (int) ev.getY(pointerIndex);
1617
1618        mWallpaperManager.sendWallpaperCommand(getWindowToken(),
1619                ev.getAction() == MotionEvent.ACTION_UP
1620                        ? WallpaperManager.COMMAND_TAP : WallpaperManager.COMMAND_SECONDARY_TAP,
1621                position[0], position[1], 0, null);
1622    }
1623
1624    /*
1625     * This interpolator emulates the rate at which the perceived scale of an object changes
1626     * as its distance from a camera increases. When this interpolator is applied to a scale
1627     * animation on a view, it evokes the sense that the object is shrinking due to moving away
1628     * from the camera.
1629     */
1630    static class ZInterpolator implements TimeInterpolator {
1631        private float focalLength;
1632
1633        public ZInterpolator(float foc) {
1634            focalLength = foc;
1635        }
1636
1637        public float getInterpolation(float input) {
1638            return (1.0f - focalLength / (focalLength + input)) /
1639                (1.0f - focalLength / (focalLength + 1.0f));
1640        }
1641    }
1642
1643    /*
1644     * The exact reverse of ZInterpolator.
1645     */
1646    static class InverseZInterpolator implements TimeInterpolator {
1647        private ZInterpolator zInterpolator;
1648        public InverseZInterpolator(float foc) {
1649            zInterpolator = new ZInterpolator(foc);
1650        }
1651        public float getInterpolation(float input) {
1652            return 1 - zInterpolator.getInterpolation(1 - input);
1653        }
1654    }
1655
1656    /*
1657     * ZInterpolator compounded with an ease-out.
1658     */
1659    static class ZoomOutInterpolator implements TimeInterpolator {
1660        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(0.75f);
1661        private final ZInterpolator zInterpolator = new ZInterpolator(0.13f);
1662
1663        public float getInterpolation(float input) {
1664            return decelerate.getInterpolation(zInterpolator.getInterpolation(input));
1665        }
1666    }
1667
1668    /*
1669     * InvereZInterpolator compounded with an ease-out.
1670     */
1671    static class ZoomInInterpolator implements TimeInterpolator {
1672        private final InverseZInterpolator inverseZInterpolator = new InverseZInterpolator(0.35f);
1673        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(3.0f);
1674
1675        public float getInterpolation(float input) {
1676            return decelerate.getInterpolation(inverseZInterpolator.getInterpolation(input));
1677        }
1678    }
1679
1680    private final ZoomInInterpolator mZoomInInterpolator = new ZoomInInterpolator();
1681
1682    /*
1683    *
1684    * We call these methods (onDragStartedWithItemSpans/onDragStartedWithSize) whenever we
1685    * start a drag in Launcher, regardless of whether the drag has ever entered the Workspace
1686    *
1687    * These methods mark the appropriate pages as accepting drops (which alters their visual
1688    * appearance).
1689    *
1690    */
1691    public void onDragStartedWithItem(View v) {
1692        final Canvas canvas = new Canvas();
1693
1694        // The outline is used to visualize where the item will land if dropped
1695        mDragOutline = createDragOutline(v, canvas, DRAG_BITMAP_PADDING);
1696    }
1697
1698    public void onDragStartedWithItem(PendingAddItemInfo info, Bitmap b, boolean clipAlpha) {
1699        final Canvas canvas = new Canvas();
1700
1701        int[] size = estimateItemSize(info.spanX, info.spanY, info, false);
1702
1703        // The outline is used to visualize where the item will land if dropped
1704        mDragOutline = createDragOutline(b, canvas, DRAG_BITMAP_PADDING, size[0],
1705                size[1], clipAlpha);
1706    }
1707
1708    public void exitWidgetResizeMode() {
1709        DragLayer dragLayer = mLauncher.getDragLayer();
1710        dragLayer.clearAllResizeFrames();
1711    }
1712
1713    private void initAnimationArrays() {
1714        final int childCount = getChildCount();
1715        if (mLastChildCount == childCount) return;
1716
1717        mOldBackgroundAlphas = new float[childCount];
1718        mOldAlphas = new float[childCount];
1719        mNewBackgroundAlphas = new float[childCount];
1720        mNewAlphas = new float[childCount];
1721    }
1722
1723    Animator getChangeStateAnimation(final State state, boolean animated) {
1724        return getChangeStateAnimation(state, animated, 0, -1);
1725    }
1726
1727    @Override
1728    protected void getOverviewModePages(int[] range) {
1729        int count = mScreenOrder.size();
1730
1731        int start = hasCustomContent() ? 1 : 0;
1732        int end = getChildCount() - 1;
1733
1734        range[0] = Math.max(0, Math.min(start, getChildCount() - 1));
1735        range[1] = Math.max(0,  end);
1736     }
1737
1738    protected void onStartReordering() {
1739        super.onStartReordering();
1740        int count = getChildCount();
1741        for (int i = 0; i < count; i++) {
1742            ((CellLayout) getChildAt(i)).setUseActiveGlowBackground(true);
1743        }
1744        showOutlines();
1745
1746        // Reordering handles its own animations, disable the automatic ones.
1747        setLayoutTransition(null);
1748    }
1749
1750    protected void onEndReordering() {
1751        super.onEndReordering();
1752        int count = getChildCount();
1753        for (int i = 0; i < count; i++) {
1754            ((CellLayout) getChildAt(i)).setUseActiveGlowBackground(false);
1755        }
1756        hideOutlines();
1757
1758        mScreenOrder.clear();
1759        for (int i = 0; i < count; i++) {
1760            CellLayout cl = ((CellLayout) getChildAt(i));
1761            mScreenOrder.add(getIdForScreen(cl));
1762        }
1763
1764        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
1765
1766        // Re-enable auto layout transitions for page deletion.
1767        setLayoutTransition(mLayoutTransition);
1768    }
1769
1770    public boolean isInOverviewMode() {
1771        return mState == State.OVERVIEW;
1772    }
1773
1774    public void enterOverviewMode() {
1775        mLauncher.onInteractionBegin();
1776        enableOverviewMode(true, -1, true);
1777    }
1778
1779    public void exitOverviewMode(boolean animated) {
1780        exitOverviewMode(-1, animated);
1781        mLauncher.onInteractionEnd();
1782    }
1783
1784    public void exitOverviewMode(int snapPage, boolean animated) {
1785        enableOverviewMode(false, snapPage, animated);
1786        mLauncher.onInteractionEnd();
1787    }
1788
1789    private void enableOverviewMode(boolean enable, int snapPage, boolean animated) {
1790        State finalState = Workspace.State.OVERVIEW;
1791        if (!enable) {
1792            finalState = Workspace.State.NORMAL;
1793        }
1794
1795        Animator workspaceAnim = getChangeStateAnimation(finalState, animated, 0, snapPage);
1796        if (workspaceAnim != null) {
1797            onTransitionPrepare();
1798            workspaceAnim.addListener(new AnimatorListenerAdapter() {
1799                @Override
1800                public void onAnimationEnd(Animator arg0) {
1801                    onTransitionEnd();
1802                }
1803            });
1804            workspaceAnim.start();
1805        }
1806    }
1807
1808    int getOverviewModeTranslationY() {
1809        int childHeight = getNormalChildHeight();
1810        int viewPortHeight = getViewportHeight();
1811        int scaledChildHeight = (int) (mOverviewModeShrinkFactor * childHeight);
1812
1813        int offset = (viewPortHeight - scaledChildHeight) / 2;
1814        int offsetDelta = mOverviewModePageOffset - offset + mInsets.top;
1815
1816        return offsetDelta;
1817    }
1818
1819    Animator getChangeStateAnimation(final State state, boolean animated, int delay, int snapPage) {
1820        if (mState == state) {
1821            return null;
1822        }
1823
1824        // Initialize animation arrays for the first time if necessary
1825        initAnimationArrays();
1826
1827        AnimatorSet anim = animated ? LauncherAnimUtils.createAnimatorSet() : null;
1828
1829        final State oldState = mState;
1830        final boolean oldStateIsNormal = (oldState == State.NORMAL);
1831        final boolean oldStateIsSpringLoaded = (oldState == State.SPRING_LOADED);
1832        final boolean oldStateIsSmall = (oldState == State.SMALL);
1833        final boolean oldStateIsOverview = (oldState == State.OVERVIEW);
1834        mState = state;
1835        final boolean stateIsNormal = (state == State.NORMAL);
1836        final boolean stateIsSpringLoaded = (state == State.SPRING_LOADED);
1837        final boolean stateIsSmall = (state == State.SMALL);
1838        final boolean stateIsOverview = (state == State.OVERVIEW);
1839        float finalBackgroundAlpha = stateIsSpringLoaded ? 1.0f : 0f;
1840        float finalHotseatAndPageIndicatorAlpha = (stateIsOverview || stateIsSmall) ? 0f : 1f;
1841        float finalOverviewPanelAlpha = stateIsOverview ? 1f : 0f;
1842        float finalSearchBarAlpha = stateIsOverview ? 0f : 1f;
1843        float finalWorkspaceTranslationY = stateIsOverview ? getOverviewModeTranslationY() : 0;
1844
1845        boolean zoomIn = true;
1846        mNewScale = 1.0f;
1847
1848        if (oldStateIsOverview) {
1849            disableFreeScroll(snapPage);
1850        } else if (stateIsOverview) {
1851            enableFreeScroll();
1852        }
1853
1854        if (state != State.NORMAL) {
1855            if (stateIsSpringLoaded) {
1856                mNewScale = mSpringLoadedShrinkFactor;
1857            } else if (stateIsOverview) {
1858                mNewScale = mOverviewModeShrinkFactor;
1859            } else if (stateIsSmall){
1860                mNewScale = mOverviewModeShrinkFactor - 0.1f;
1861            }
1862            if (oldStateIsNormal && stateIsSmall) {
1863                zoomIn = false;
1864                updateChildrenLayersEnabled(false);
1865            } else {
1866                finalBackgroundAlpha = 1.0f;
1867            }
1868        }
1869        final int duration = zoomIn ?
1870                getResources().getInteger(R.integer.config_workspaceUnshrinkTime) :
1871                getResources().getInteger(R.integer.config_appsCustomizeWorkspaceShrinkTime);
1872        for (int i = 0; i < getChildCount(); i++) {
1873            final CellLayout cl = (CellLayout) getChildAt(i);
1874            float finalAlpha = (!mWorkspaceFadeInAdjacentScreens || stateIsSpringLoaded ||
1875                    (i == mCurrentPage)) ? 1f : 0f;
1876            float currentAlpha = cl.getShortcutsAndWidgets().getAlpha();
1877            float initialAlpha = currentAlpha;
1878
1879            // Determine the pages alpha during the state transition
1880            if ((oldStateIsSmall && stateIsNormal) ||
1881                (oldStateIsNormal && stateIsSmall)) {
1882                // To/from workspace - only show the current page unless the transition is not
1883                //                     animated and the animation end callback below doesn't run;
1884                //                     or, if we're in spring-loaded mode
1885                if (i == mCurrentPage || !animated || oldStateIsSpringLoaded) {
1886                    finalAlpha = 1f;
1887                } else {
1888                    initialAlpha = 0f;
1889                    finalAlpha = 0f;
1890                }
1891            }
1892
1893            mOldAlphas[i] = initialAlpha;
1894            mNewAlphas[i] = finalAlpha;
1895            if (animated) {
1896                mOldBackgroundAlphas[i] = cl.getBackgroundAlpha();
1897                mNewBackgroundAlphas[i] = finalBackgroundAlpha;
1898            } else {
1899                cl.setBackgroundAlpha(finalBackgroundAlpha);
1900                cl.setShortcutAndWidgetAlpha(finalAlpha);
1901            }
1902        }
1903
1904        View searchBar = mLauncher.getQsbBar();
1905        if (animated) {
1906            LauncherViewPropertyAnimator scale = new LauncherViewPropertyAnimator(this);
1907            scale.scaleX(mNewScale)
1908                .scaleY(mNewScale)
1909                .translationY(finalWorkspaceTranslationY)
1910                .setInterpolator(mZoomInInterpolator);
1911            anim.play(scale);
1912            for (int index = 0; index < getChildCount(); index++) {
1913                final int i = index;
1914                final CellLayout cl = (CellLayout) getChildAt(i);
1915                float currentAlpha = cl.getShortcutsAndWidgets().getAlpha();
1916                if (mOldAlphas[i] == 0 && mNewAlphas[i] == 0) {
1917                    cl.setBackgroundAlpha(mNewBackgroundAlphas[i]);
1918                    cl.setShortcutAndWidgetAlpha(mNewAlphas[i]);
1919                } else {
1920
1921                    if (mOldAlphas[i] != mNewAlphas[i] || currentAlpha != mNewAlphas[i]) {
1922                        LauncherViewPropertyAnimator alphaAnim =
1923                            new LauncherViewPropertyAnimator(cl.getShortcutsAndWidgets());
1924                        alphaAnim.alpha(mNewAlphas[i])
1925                            .setDuration(duration)
1926                            .setInterpolator(mZoomInInterpolator);
1927                        anim.play(alphaAnim);
1928                    }
1929                    if (mOldBackgroundAlphas[i] != 0 ||
1930                        mNewBackgroundAlphas[i] != 0) {
1931                        ValueAnimator bgAnim =
1932                                LauncherAnimUtils.ofFloat(cl, 0f, 1f).setDuration(duration);
1933                        bgAnim.setInterpolator(mZoomInInterpolator);
1934                        bgAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
1935                                public void onAnimationUpdate(float a, float b) {
1936                                    cl.setBackgroundAlpha(
1937                                            a * mOldBackgroundAlphas[i] +
1938                                            b * mNewBackgroundAlphas[i]);
1939                                }
1940                            });
1941                        anim.play(bgAnim);
1942                    }
1943                }
1944            }
1945            ObjectAnimator pageIndicatorAlpha = null;
1946            if (getPageIndicator() != null) {
1947                pageIndicatorAlpha = ObjectAnimator.ofFloat(getPageIndicator(), "alpha",
1948                        finalHotseatAndPageIndicatorAlpha);
1949            }
1950            ObjectAnimator hotseatAlpha = ObjectAnimator.ofFloat(mLauncher.getHotseat(), "alpha",
1951                    finalHotseatAndPageIndicatorAlpha);
1952            ObjectAnimator searchBarAlpha = ObjectAnimator.ofFloat(searchBar,
1953                    "alpha", finalSearchBarAlpha);
1954            ObjectAnimator overviewPanelAlpha = ObjectAnimator.ofFloat(mLauncher.getOverviewPanel(),
1955                    "alpha", finalOverviewPanelAlpha);
1956            overviewPanelAlpha.addUpdateListener(new AlphaUpdateListener(
1957                    mLauncher.getOverviewPanel()));
1958            hotseatAlpha.addUpdateListener(new AlphaUpdateListener(mLauncher.getHotseat()));
1959            searchBarAlpha.addUpdateListener(new AlphaUpdateListener(searchBar));
1960            if (getPageIndicator() != null) {
1961                pageIndicatorAlpha.addUpdateListener(new AlphaUpdateListener(getPageIndicator()));
1962            }
1963            anim.play(overviewPanelAlpha);
1964            anim.play(hotseatAlpha);
1965            anim.play(searchBarAlpha);
1966            anim.play(pageIndicatorAlpha);
1967            anim.setStartDelay(delay);
1968        } else {
1969            mLauncher.getOverviewPanel().setAlpha(finalOverviewPanelAlpha);
1970            AlphaUpdateListener.updateVisibility(mLauncher.getOverviewPanel());
1971            mLauncher.getHotseat().setAlpha(finalHotseatAndPageIndicatorAlpha);
1972            AlphaUpdateListener.updateVisibility(mLauncher.getHotseat());
1973            if (getPageIndicator() != null) {
1974                getPageIndicator().setAlpha(finalHotseatAndPageIndicatorAlpha);
1975                AlphaUpdateListener.updateVisibility(getPageIndicator());
1976            }
1977            searchBar.setAlpha(finalSearchBarAlpha);
1978            AlphaUpdateListener.updateVisibility(searchBar);
1979            updateCustomContentVisibility();
1980            setScaleX(mNewScale);
1981            setScaleY(mNewScale);
1982            setTranslationY(finalWorkspaceTranslationY);
1983        }
1984        if (finalSearchBarAlpha == 0) {
1985            mLauncher.setVoiceButtonProxyVisible(false);
1986        } else {
1987            mLauncher.setVoiceButtonProxyVisible(true);
1988        }
1989
1990        if (stateIsSpringLoaded) {
1991            // Right now we're covered by Apps Customize
1992            // Show the background gradient immediately, so the gradient will
1993            // be showing once AppsCustomize disappears
1994            animateBackgroundGradient(getResources().getInteger(
1995                    R.integer.config_appsCustomizeSpringLoadedBgAlpha) / 100f, false);
1996        } else if (stateIsOverview) {
1997            animateBackgroundGradient(getResources().getInteger(
1998                    R.integer.config_appsCustomizeSpringLoadedBgAlpha) / 100f, true);
1999        } else {
2000            // Fade the background gradient away
2001            animateBackgroundGradient(0f, true);
2002        }
2003        return anim;
2004    }
2005
2006    static class AlphaUpdateListener implements AnimatorUpdateListener {
2007        View view;
2008        public AlphaUpdateListener(View v) {
2009            view = v;
2010        }
2011
2012        @Override
2013        public void onAnimationUpdate(ValueAnimator arg0) {
2014            updateVisibility(view);
2015        }
2016
2017        public static void updateVisibility(View view) {
2018            if (view.getAlpha() < ALPHA_CUTOFF_THRESHOLD && view.getVisibility() != INVISIBLE) {
2019                view.setVisibility(INVISIBLE);
2020            } else if (view.getAlpha() > ALPHA_CUTOFF_THRESHOLD
2021                    && view.getVisibility() != VISIBLE) {
2022                view.setVisibility(VISIBLE);
2023            }
2024        }
2025    }
2026
2027    @Override
2028    public void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace) {
2029        onTransitionPrepare();
2030    }
2031
2032    @Override
2033    public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) {
2034    }
2035
2036    @Override
2037    public void onLauncherTransitionStep(Launcher l, float t) {
2038        mTransitionProgress = t;
2039    }
2040
2041    @Override
2042    public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
2043        onTransitionEnd();
2044    }
2045
2046    private void onTransitionPrepare() {
2047        mIsSwitchingState = true;
2048        updateChildrenLayersEnabled(false);
2049        hideCustomContentIfNecessary();
2050    }
2051
2052    void updateCustomContentVisibility() {
2053        int visibility = mState == Workspace.State.NORMAL ? VISIBLE : INVISIBLE;
2054        if (hasCustomContent()) {
2055            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(visibility);
2056        }
2057    }
2058
2059    void showCustomContentIfNecessary() {
2060        boolean show  = mState == Workspace.State.NORMAL;
2061        if (show && hasCustomContent()) {
2062            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(VISIBLE);
2063        }
2064    }
2065
2066    void hideCustomContentIfNecessary() {
2067        boolean hide  = mState != Workspace.State.NORMAL;
2068        if (hide && hasCustomContent()) {
2069            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(INVISIBLE);
2070        }
2071    }
2072
2073    private void onTransitionEnd() {
2074        mIsSwitchingState = false;
2075        updateChildrenLayersEnabled(false);
2076        // The code in getChangeStateAnimation to determine initialAlpha and finalAlpha will ensure
2077        // ensure that only the current page is visible during (and subsequently, after) the
2078        // transition animation.  If fade adjacent pages is disabled, then re-enable the page
2079        // visibility after the transition animation.
2080        if (!mWorkspaceFadeInAdjacentScreens) {
2081            for (int i = 0; i < getChildCount(); i++) {
2082                final CellLayout cl = (CellLayout) getChildAt(i);
2083                cl.setShortcutAndWidgetAlpha(1f);
2084            }
2085        }
2086        showCustomContentIfNecessary();
2087    }
2088
2089    @Override
2090    public View getContent() {
2091        return this;
2092    }
2093
2094    /**
2095     * Draw the View v into the given Canvas.
2096     *
2097     * @param v the view to draw
2098     * @param destCanvas the canvas to draw on
2099     * @param padding the horizontal and vertical padding to use when drawing
2100     */
2101    private void drawDragView(View v, Canvas destCanvas, int padding, boolean pruneToDrawable) {
2102        final Rect clipRect = mTempRect;
2103        v.getDrawingRect(clipRect);
2104
2105        boolean textVisible = false;
2106
2107        destCanvas.save();
2108        if (v instanceof TextView && pruneToDrawable) {
2109            Drawable d = ((TextView) v).getCompoundDrawables()[1];
2110            clipRect.set(0, 0, d.getIntrinsicWidth() + padding, d.getIntrinsicHeight() + padding);
2111            destCanvas.translate(padding / 2, padding / 2);
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            } else if (v instanceof BubbleTextView) {
2122                final BubbleTextView tv = (BubbleTextView) v;
2123                clipRect.bottom = tv.getExtendedPaddingTop() - (int) BubbleTextView.PADDING_V +
2124                        tv.getLayout().getLineTop(0);
2125            } else if (v instanceof TextView) {
2126                final TextView tv = (TextView) v;
2127                clipRect.bottom = tv.getExtendedPaddingTop() - tv.getCompoundDrawablePadding() +
2128                        tv.getLayout().getLineTop(0);
2129            }
2130            destCanvas.translate(-v.getScrollX() + padding / 2, -v.getScrollY() + padding / 2);
2131            destCanvas.clipRect(clipRect, Op.REPLACE);
2132            v.draw(destCanvas);
2133
2134            // Restore text visibility of FolderIcon if necessary
2135            if (textVisible) {
2136                ((FolderIcon) v).setTextVisible(true);
2137            }
2138        }
2139        destCanvas.restore();
2140    }
2141
2142    /**
2143     * Returns a new bitmap to show when the given View is being dragged around.
2144     * Responsibility for the bitmap is transferred to the caller.
2145     */
2146    public Bitmap createDragBitmap(View v, Canvas canvas, int padding) {
2147        Bitmap b;
2148
2149        if (v instanceof TextView) {
2150            Drawable d = ((TextView) v).getCompoundDrawables()[1];
2151            b = Bitmap.createBitmap(d.getIntrinsicWidth() + padding,
2152                    d.getIntrinsicHeight() + padding, Bitmap.Config.ARGB_8888);
2153        } else {
2154            b = Bitmap.createBitmap(
2155                    v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2156        }
2157
2158        canvas.setBitmap(b);
2159        drawDragView(v, canvas, padding, true);
2160        canvas.setBitmap(null);
2161
2162        return b;
2163    }
2164
2165    /**
2166     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2167     * Responsibility for the bitmap is transferred to the caller.
2168     */
2169    private Bitmap createDragOutline(View v, Canvas canvas, int padding) {
2170        final int outlineColor = getResources().getColor(R.color.outline_color);
2171        final Bitmap b = Bitmap.createBitmap(
2172                v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2173
2174        canvas.setBitmap(b);
2175        drawDragView(v, canvas, padding, true);
2176        mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor);
2177        canvas.setBitmap(null);
2178        return b;
2179    }
2180
2181    /**
2182     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2183     * Responsibility for the bitmap is transferred to the caller.
2184     */
2185    private Bitmap createDragOutline(Bitmap orig, Canvas canvas, int padding, int w, int h,
2186            boolean clipAlpha) {
2187        final int outlineColor = getResources().getColor(R.color.outline_color);
2188        final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
2189        canvas.setBitmap(b);
2190
2191        Rect src = new Rect(0, 0, orig.getWidth(), orig.getHeight());
2192        float scaleFactor = Math.min((w - padding) / (float) orig.getWidth(),
2193                (h - padding) / (float) orig.getHeight());
2194        int scaledWidth = (int) (scaleFactor * orig.getWidth());
2195        int scaledHeight = (int) (scaleFactor * orig.getHeight());
2196        Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);
2197
2198        // center the image
2199        dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);
2200
2201        canvas.drawBitmap(orig, src, dst, null);
2202        mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor,
2203                clipAlpha);
2204        canvas.setBitmap(null);
2205
2206        return b;
2207    }
2208
2209    void startDrag(CellLayout.CellInfo cellInfo) {
2210        View child = cellInfo.cell;
2211
2212        // Make sure the drag was started by a long press as opposed to a long click.
2213        if (!child.isInTouchMode()) {
2214            return;
2215        }
2216
2217        mDragInfo = cellInfo;
2218        child.setVisibility(INVISIBLE);
2219        CellLayout layout = (CellLayout) child.getParent().getParent();
2220        layout.prepareChildForDrag(child);
2221
2222        child.clearFocus();
2223        child.setPressed(false);
2224
2225        final Canvas canvas = new Canvas();
2226
2227        // The outline is used to visualize where the item will land if dropped
2228        mDragOutline = createDragOutline(child, canvas, DRAG_BITMAP_PADDING);
2229        beginDragShared(child, this);
2230    }
2231
2232    public void beginDragShared(View child, DragSource source) {
2233        // The drag bitmap follows the touch point around on the screen
2234        final Bitmap b = createDragBitmap(child, new Canvas(), DRAG_BITMAP_PADDING);
2235
2236        final int bmpWidth = b.getWidth();
2237        final int bmpHeight = b.getHeight();
2238
2239        float scale = mLauncher.getDragLayer().getLocationInDragLayer(child, mTempXY);
2240        int dragLayerX =
2241                Math.round(mTempXY[0] - (bmpWidth - scale * child.getWidth()) / 2);
2242        int dragLayerY =
2243                Math.round(mTempXY[1] - (bmpHeight - scale * bmpHeight) / 2
2244                        - DRAG_BITMAP_PADDING / 2);
2245
2246        LauncherAppState app = LauncherAppState.getInstance();
2247        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
2248        Point dragVisualizeOffset = null;
2249        Rect dragRect = null;
2250        if (child instanceof BubbleTextView || child instanceof PagedViewIcon) {
2251            int iconSize = grid.iconSizePx;
2252            int top = child.getPaddingTop();
2253            int left = (bmpWidth - iconSize) / 2;
2254            int right = left + iconSize;
2255            int bottom = top + iconSize;
2256            dragLayerY += top;
2257            // Note: The drag region is used to calculate drag layer offsets, but the
2258            // dragVisualizeOffset in addition to the dragRect (the size) to position the outline.
2259            dragVisualizeOffset = new Point(-DRAG_BITMAP_PADDING / 2, DRAG_BITMAP_PADDING / 2);
2260            dragRect = new Rect(left, top, right, bottom);
2261        } else if (child instanceof FolderIcon) {
2262            int previewSize = grid.folderIconSizePx;
2263            dragRect = new Rect(0, child.getPaddingTop(), child.getWidth(), previewSize);
2264        }
2265
2266        // Clear the pressed state if necessary
2267        if (child instanceof BubbleTextView) {
2268            BubbleTextView icon = (BubbleTextView) child;
2269            icon.clearPressedOrFocusedBackground();
2270        }
2271
2272        mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
2273                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale);
2274
2275        if (child.getParent() instanceof ShortcutAndWidgetContainer) {
2276            mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent();
2277        }
2278
2279        b.recycle();
2280    }
2281
2282    void addApplicationShortcut(ShortcutInfo info, CellLayout target, long container, long screenId,
2283            int cellX, int cellY, boolean insertAtFirst, int intersectX, int intersectY) {
2284        View view = mLauncher.createShortcut(R.layout.application, target, (ShortcutInfo) info);
2285
2286        final int[] cellXY = new int[2];
2287        target.findCellForSpanThatIntersects(cellXY, 1, 1, intersectX, intersectY);
2288        addInScreen(view, container, screenId, cellXY[0], cellXY[1], 1, 1, insertAtFirst);
2289
2290        LauncherModel.addOrMoveItemInDatabase(mLauncher, info, container, screenId, cellXY[0],
2291                cellXY[1]);
2292    }
2293
2294    public boolean transitionStateShouldAllowDrop() {
2295        return ((!isSwitchingState() || mTransitionProgress > 0.5f) && mState != State.SMALL);
2296    }
2297
2298    /**
2299     * {@inheritDoc}
2300     */
2301    public boolean acceptDrop(DragObject d) {
2302        // If it's an external drop (e.g. from All Apps), check if it should be accepted
2303        CellLayout dropTargetLayout = mDropToLayout;
2304        if (d.dragSource != this) {
2305            // Don't accept the drop if we're not over a screen at time of drop
2306            if (dropTargetLayout == null) {
2307                return false;
2308            }
2309            if (!transitionStateShouldAllowDrop()) return false;
2310
2311            mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset,
2312                    d.dragView, mDragViewVisualCenter);
2313
2314            // We want the point to be mapped to the dragTarget.
2315            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2316                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2317            } else {
2318                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2319            }
2320
2321            int spanX = 1;
2322            int spanY = 1;
2323            if (mDragInfo != null) {
2324                final CellLayout.CellInfo dragCellInfo = mDragInfo;
2325                spanX = dragCellInfo.spanX;
2326                spanY = dragCellInfo.spanY;
2327            } else {
2328                final ItemInfo dragInfo = (ItemInfo) d.dragInfo;
2329                spanX = dragInfo.spanX;
2330                spanY = dragInfo.spanY;
2331            }
2332
2333            int minSpanX = spanX;
2334            int minSpanY = spanY;
2335            if (d.dragInfo instanceof PendingAddWidgetInfo) {
2336                minSpanX = ((PendingAddWidgetInfo) d.dragInfo).minSpanX;
2337                minSpanY = ((PendingAddWidgetInfo) d.dragInfo).minSpanY;
2338            }
2339
2340            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
2341                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, dropTargetLayout,
2342                    mTargetCell);
2343            float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2344                    mDragViewVisualCenter[1], mTargetCell);
2345            if (willCreateUserFolder((ItemInfo) d.dragInfo, dropTargetLayout,
2346                    mTargetCell, distance, true)) {
2347                return true;
2348            }
2349            if (willAddToExistingUserFolder((ItemInfo) d.dragInfo, dropTargetLayout,
2350                    mTargetCell, distance)) {
2351                return true;
2352            }
2353
2354            int[] resultSpan = new int[2];
2355            mTargetCell = dropTargetLayout.createArea((int) mDragViewVisualCenter[0],
2356                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
2357                    null, mTargetCell, resultSpan, CellLayout.MODE_ACCEPT_DROP);
2358            boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2359
2360            // Don't accept the drop if there's no room for the item
2361            if (!foundCell) {
2362                // Don't show the message if we are dropping on the AllApps button and the hotseat
2363                // is full
2364                boolean isHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2365                if (mTargetCell != null && isHotseat) {
2366                    Hotseat hotseat = mLauncher.getHotseat();
2367                    if (hotseat.isAllAppsButtonRank(
2368                            hotseat.getOrderInHotseat(mTargetCell[0], mTargetCell[1]))) {
2369                        return false;
2370                    }
2371                }
2372
2373                mLauncher.showOutOfSpaceMessage(isHotseat);
2374                return false;
2375            }
2376        }
2377
2378        long screenId = getIdForScreen(dropTargetLayout);
2379        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
2380            commitExtraEmptyScreen();
2381        }
2382
2383        return true;
2384    }
2385
2386    boolean willCreateUserFolder(ItemInfo info, CellLayout target, int[] targetCell, float
2387            distance, boolean considerTimeout) {
2388        if (distance > mMaxDistanceForFolderCreation) return false;
2389        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2390
2391        if (dropOverView != null) {
2392            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2393            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2394                return false;
2395            }
2396        }
2397
2398        boolean hasntMoved = false;
2399        if (mDragInfo != null) {
2400            hasntMoved = dropOverView == mDragInfo.cell;
2401        }
2402
2403        if (dropOverView == null || hasntMoved || (considerTimeout && !mCreateUserFolderOnDrop)) {
2404            return false;
2405        }
2406
2407        boolean aboveShortcut = (dropOverView.getTag() instanceof ShortcutInfo);
2408        boolean willBecomeShortcut =
2409                (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
2410                info.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT);
2411
2412        return (aboveShortcut && willBecomeShortcut);
2413    }
2414
2415    boolean willAddToExistingUserFolder(Object dragInfo, CellLayout target, int[] targetCell,
2416            float distance) {
2417        if (distance > mMaxDistanceForFolderCreation) return false;
2418        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2419
2420        if (dropOverView != null) {
2421            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2422            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2423                return false;
2424            }
2425        }
2426
2427        if (dropOverView instanceof FolderIcon) {
2428            FolderIcon fi = (FolderIcon) dropOverView;
2429            if (fi.acceptDrop(dragInfo)) {
2430                return true;
2431            }
2432        }
2433        return false;
2434    }
2435
2436    boolean createUserFolderIfNecessary(View newView, long container, CellLayout target,
2437            int[] targetCell, float distance, boolean external, DragView dragView,
2438            Runnable postAnimationRunnable) {
2439        if (distance > mMaxDistanceForFolderCreation) return false;
2440        View v = target.getChildAt(targetCell[0], targetCell[1]);
2441
2442        boolean hasntMoved = false;
2443        if (mDragInfo != null) {
2444            CellLayout cellParent = getParentCellLayoutForView(mDragInfo.cell);
2445            hasntMoved = (mDragInfo.cellX == targetCell[0] &&
2446                    mDragInfo.cellY == targetCell[1]) && (cellParent == target);
2447        }
2448
2449        if (v == null || hasntMoved || !mCreateUserFolderOnDrop) return false;
2450        mCreateUserFolderOnDrop = false;
2451        final long screenId = (targetCell == null) ? mDragInfo.screenId : getIdForScreen(target);
2452
2453        boolean aboveShortcut = (v.getTag() instanceof ShortcutInfo);
2454        boolean willBecomeShortcut = (newView.getTag() instanceof ShortcutInfo);
2455
2456        if (aboveShortcut && willBecomeShortcut) {
2457            ShortcutInfo sourceInfo = (ShortcutInfo) newView.getTag();
2458            ShortcutInfo destInfo = (ShortcutInfo) v.getTag();
2459            // if the drag started here, we need to remove it from the workspace
2460            if (!external) {
2461                getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2462            }
2463
2464            Rect folderLocation = new Rect();
2465            float scale = mLauncher.getDragLayer().getDescendantRectRelativeToSelf(v, folderLocation);
2466            target.removeView(v);
2467
2468            FolderIcon fi =
2469                mLauncher.addFolder(target, container, screenId, targetCell[0], targetCell[1]);
2470            destInfo.cellX = -1;
2471            destInfo.cellY = -1;
2472            sourceInfo.cellX = -1;
2473            sourceInfo.cellY = -1;
2474
2475            // If the dragView is null, we can't animate
2476            boolean animate = dragView != null;
2477            if (animate) {
2478                fi.performCreateAnimation(destInfo, v, sourceInfo, dragView, folderLocation, scale,
2479                        postAnimationRunnable);
2480            } else {
2481                fi.addItem(destInfo);
2482                fi.addItem(sourceInfo);
2483            }
2484            return true;
2485        }
2486        return false;
2487    }
2488
2489    boolean addToExistingFolderIfNecessary(View newView, CellLayout target, int[] targetCell,
2490            float distance, DragObject d, boolean external) {
2491        if (distance > mMaxDistanceForFolderCreation) return false;
2492
2493        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2494        if (!mAddToExistingFolderOnDrop) return false;
2495        mAddToExistingFolderOnDrop = false;
2496
2497        if (dropOverView instanceof FolderIcon) {
2498            FolderIcon fi = (FolderIcon) dropOverView;
2499            if (fi.acceptDrop(d.dragInfo)) {
2500                fi.onDrop(d);
2501
2502                // if the drag started here, we need to remove it from the workspace
2503                if (!external) {
2504                    getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2505                }
2506                return true;
2507            }
2508        }
2509        return false;
2510    }
2511
2512    public void onDrop(final DragObject d) {
2513        mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset, d.dragView,
2514                mDragViewVisualCenter);
2515
2516        CellLayout dropTargetLayout = mDropToLayout;
2517
2518        // We want the point to be mapped to the dragTarget.
2519        if (dropTargetLayout != null) {
2520            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2521                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2522            } else {
2523                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2524            }
2525        }
2526
2527        int snapScreen = -1;
2528        boolean resizeOnDrop = false;
2529        if (d.dragSource != this) {
2530            final int[] touchXY = new int[] { (int) mDragViewVisualCenter[0],
2531                    (int) mDragViewVisualCenter[1] };
2532            onDropExternal(touchXY, d.dragInfo, dropTargetLayout, false, d);
2533        } else if (mDragInfo != null) {
2534            final View cell = mDragInfo.cell;
2535
2536            Runnable resizeRunnable = null;
2537            if (dropTargetLayout != null && !d.cancelled) {
2538                // Move internally
2539                boolean hasMovedLayouts = (getParentCellLayoutForView(cell) != dropTargetLayout);
2540                boolean hasMovedIntoHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2541                long container = hasMovedIntoHotseat ?
2542                        LauncherSettings.Favorites.CONTAINER_HOTSEAT :
2543                        LauncherSettings.Favorites.CONTAINER_DESKTOP;
2544                long screenId = (mTargetCell[0] < 0) ?
2545                        mDragInfo.screenId : getIdForScreen(dropTargetLayout);
2546                int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
2547                int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
2548                // First we find the cell nearest to point at which the item is
2549                // dropped, without any consideration to whether there is an item there.
2550
2551                mTargetCell = findNearestArea((int) mDragViewVisualCenter[0], (int)
2552                        mDragViewVisualCenter[1], spanX, spanY, dropTargetLayout, mTargetCell);
2553                float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2554                        mDragViewVisualCenter[1], mTargetCell);
2555
2556                // If the item being dropped is a shortcut and the nearest drop
2557                // cell also contains a shortcut, then create a folder with the two shortcuts.
2558                if (!mInScrollArea && createUserFolderIfNecessary(cell, container,
2559                        dropTargetLayout, mTargetCell, distance, false, d.dragView, null)) {
2560                    stripEmptyScreens();
2561                    return;
2562                }
2563
2564                if (addToExistingFolderIfNecessary(cell, dropTargetLayout, mTargetCell,
2565                        distance, d, false)) {
2566                    stripEmptyScreens();
2567                    return;
2568                }
2569
2570                // Aside from the special case where we're dropping a shortcut onto a shortcut,
2571                // we need to find the nearest cell location that is vacant
2572                ItemInfo item = (ItemInfo) d.dragInfo;
2573                int minSpanX = item.spanX;
2574                int minSpanY = item.spanY;
2575                if (item.minSpanX > 0 && item.minSpanY > 0) {
2576                    minSpanX = item.minSpanX;
2577                    minSpanY = item.minSpanY;
2578                }
2579
2580                int[] resultSpan = new int[2];
2581                mTargetCell = dropTargetLayout.createArea((int) mDragViewVisualCenter[0],
2582                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY, cell,
2583                        mTargetCell, resultSpan, CellLayout.MODE_ON_DROP);
2584
2585                boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2586
2587                // if the widget resizes on drop
2588                if (foundCell && (cell instanceof AppWidgetHostView) &&
2589                        (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY)) {
2590                    resizeOnDrop = true;
2591                    item.spanX = resultSpan[0];
2592                    item.spanY = resultSpan[1];
2593                    AppWidgetHostView awhv = (AppWidgetHostView) cell;
2594                    AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, resultSpan[0],
2595                            resultSpan[1]);
2596                }
2597
2598                if (getScreenIdForPageIndex(mCurrentPage) != screenId && !hasMovedIntoHotseat) {
2599                    snapScreen = getPageIndexForScreenId(screenId);
2600                    snapToPage(snapScreen);
2601                }
2602
2603                if (foundCell) {
2604                    final ItemInfo info = (ItemInfo) cell.getTag();
2605                    if (hasMovedLayouts) {
2606                        // Reparent the view
2607                        getParentCellLayoutForView(cell).removeView(cell);
2608                        addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
2609                                info.spanX, info.spanY);
2610                    }
2611
2612                    // update the item's position after drop
2613                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2614                    lp.cellX = lp.tmpCellX = mTargetCell[0];
2615                    lp.cellY = lp.tmpCellY = mTargetCell[1];
2616                    lp.cellHSpan = item.spanX;
2617                    lp.cellVSpan = item.spanY;
2618                    lp.isLockedToGrid = true;
2619                    cell.setId(LauncherModel.getCellLayoutChildId(container, mDragInfo.screenId,
2620                            mTargetCell[0], mTargetCell[1], mDragInfo.spanX, mDragInfo.spanY));
2621
2622                    if (container != LauncherSettings.Favorites.CONTAINER_HOTSEAT &&
2623                            cell instanceof LauncherAppWidgetHostView) {
2624                        final CellLayout cellLayout = dropTargetLayout;
2625                        // We post this call so that the widget has a chance to be placed
2626                        // in its final location
2627
2628                        final LauncherAppWidgetHostView hostView = (LauncherAppWidgetHostView) cell;
2629                        AppWidgetProviderInfo pinfo = hostView.getAppWidgetInfo();
2630                        if (pinfo != null &&
2631                                pinfo.resizeMode != AppWidgetProviderInfo.RESIZE_NONE) {
2632                            final Runnable addResizeFrame = new Runnable() {
2633                                public void run() {
2634                                    DragLayer dragLayer = mLauncher.getDragLayer();
2635                                    dragLayer.addResizeFrame(info, hostView, cellLayout);
2636                                }
2637                            };
2638                            resizeRunnable = (new Runnable() {
2639                                public void run() {
2640                                    if (!isPageMoving()) {
2641                                        addResizeFrame.run();
2642                                    } else {
2643                                        mDelayedResizeRunnable = addResizeFrame;
2644                                    }
2645                                }
2646                            });
2647                        }
2648                    }
2649
2650                    LauncherModel.moveItemInDatabase(mLauncher, info, container, screenId, lp.cellX,
2651                            lp.cellY);
2652                } else {
2653                    // If we can't find a drop location, we return the item to its original position
2654                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2655                    mTargetCell[0] = lp.cellX;
2656                    mTargetCell[1] = lp.cellY;
2657                    CellLayout layout = (CellLayout) cell.getParent().getParent();
2658                    layout.markCellsAsOccupiedForView(cell);
2659                }
2660            }
2661
2662            final CellLayout parent = (CellLayout) cell.getParent().getParent();
2663            final Runnable finalResizeRunnable = resizeRunnable;
2664            // Prepare it to be animated into its new position
2665            // This must be called after the view has been re-parented
2666            final Runnable onCompleteRunnable = new Runnable() {
2667                @Override
2668                public void run() {
2669                    mAnimatingViewIntoPlace = false;
2670                    updateChildrenLayersEnabled(false);
2671                    if (finalResizeRunnable != null) {
2672                        finalResizeRunnable.run();
2673                    }
2674                    stripEmptyScreens();
2675                }
2676            };
2677            mAnimatingViewIntoPlace = true;
2678            if (d.dragView.hasDrawn()) {
2679                final ItemInfo info = (ItemInfo) cell.getTag();
2680                if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET) {
2681                    int animationType = resizeOnDrop ? ANIMATE_INTO_POSITION_AND_RESIZE :
2682                            ANIMATE_INTO_POSITION_AND_DISAPPEAR;
2683                    animateWidgetDrop(info, parent, d.dragView,
2684                            onCompleteRunnable, animationType, cell, false);
2685                } else {
2686                    int duration = snapScreen < 0 ? -1 : ADJACENT_SCREEN_DROP_DURATION;
2687                    mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
2688                            onCompleteRunnable, this);
2689                }
2690            } else {
2691                d.deferDragViewCleanupPostAnimation = false;
2692                cell.setVisibility(VISIBLE);
2693            }
2694            parent.onDropChild(cell);
2695        }
2696    }
2697
2698    public void setFinalScrollForPageChange(int pageIndex) {
2699        CellLayout cl = (CellLayout) getChildAt(pageIndex);
2700        if (cl != null) {
2701            mSavedScrollX = getScrollX();
2702            mSavedTranslationX = cl.getTranslationX();
2703            mSavedRotationY = cl.getRotationY();
2704            final int newX = getScrollForPage(pageIndex);
2705            setScrollX(newX);
2706            cl.setTranslationX(0f);
2707            cl.setRotationY(0f);
2708        }
2709    }
2710
2711    public void resetFinalScrollForPageChange(int pageIndex) {
2712        if (pageIndex >= 0) {
2713            CellLayout cl = (CellLayout) getChildAt(pageIndex);
2714            setScrollX(mSavedScrollX);
2715            cl.setTranslationX(mSavedTranslationX);
2716            cl.setRotationY(mSavedRotationY);
2717        }
2718    }
2719
2720    public void getViewLocationRelativeToSelf(View v, int[] location) {
2721        getLocationInWindow(location);
2722        int x = location[0];
2723        int y = location[1];
2724
2725        v.getLocationInWindow(location);
2726        int vX = location[0];
2727        int vY = location[1];
2728
2729        location[0] = vX - x;
2730        location[1] = vY - y;
2731    }
2732
2733    public void onDragEnter(DragObject d) {
2734        mDragEnforcer.onDragEnter();
2735        mCreateUserFolderOnDrop = false;
2736        mAddToExistingFolderOnDrop = false;
2737
2738        mDropToLayout = null;
2739        CellLayout layout = getCurrentDropLayout();
2740        setCurrentDropLayout(layout);
2741        setCurrentDragOverlappingLayout(layout);
2742
2743        // Because we don't have space in the Phone UI (the CellLayouts run to the edge) we
2744        // don't need to show the outlines
2745        if (LauncherAppState.getInstance().isScreenLarge()) {
2746            showOutlines();
2747        }
2748    }
2749
2750    static Rect getCellLayoutMetrics(Launcher launcher, int orientation) {
2751        LauncherAppState app = LauncherAppState.getInstance();
2752        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
2753
2754        Resources res = launcher.getResources();
2755        Display display = launcher.getWindowManager().getDefaultDisplay();
2756        Point smallestSize = new Point();
2757        Point largestSize = new Point();
2758        display.getCurrentSizeRange(smallestSize, largestSize);
2759        int countX = (int) grid.numColumns;
2760        int countY = (int) grid.numRows;
2761        if (orientation == CellLayout.LANDSCAPE) {
2762            if (mLandscapeCellLayoutMetrics == null) {
2763                Rect padding = grid.getWorkspacePadding(CellLayout.LANDSCAPE);
2764                int width = largestSize.x - padding.left - padding.right;
2765                int height = smallestSize.y - padding.top - padding.bottom;
2766                mLandscapeCellLayoutMetrics = new Rect();
2767                CellLayout.getMetrics(mLandscapeCellLayoutMetrics, width, height,
2768                        countX, countY);
2769            }
2770            return mLandscapeCellLayoutMetrics;
2771        } else if (orientation == CellLayout.PORTRAIT) {
2772            if (mPortraitCellLayoutMetrics == null) {
2773                Rect padding = grid.getWorkspacePadding(CellLayout.PORTRAIT);
2774                int width = smallestSize.x - padding.left - padding.right;
2775                int height = largestSize.y - padding.top - padding.bottom;
2776                mPortraitCellLayoutMetrics = new Rect();
2777                CellLayout.getMetrics(mPortraitCellLayoutMetrics, width, height,
2778                        countX, countY);
2779            }
2780            return mPortraitCellLayoutMetrics;
2781        }
2782        return null;
2783    }
2784
2785    public void onDragExit(DragObject d) {
2786        mDragEnforcer.onDragExit();
2787
2788        // Here we store the final page that will be dropped to, if the workspace in fact
2789        // receives the drop
2790        if (mInScrollArea) {
2791            if (isPageMoving()) {
2792                // If the user drops while the page is scrolling, we should use that page as the
2793                // destination instead of the page that is being hovered over.
2794                mDropToLayout = (CellLayout) getPageAt(getNextPage());
2795            } else {
2796                mDropToLayout = mDragOverlappingLayout;
2797            }
2798        } else {
2799            mDropToLayout = mDragTargetLayout;
2800        }
2801
2802        if (mDragMode == DRAG_MODE_CREATE_FOLDER) {
2803            mCreateUserFolderOnDrop = true;
2804        } else if (mDragMode == DRAG_MODE_ADD_TO_FOLDER) {
2805            mAddToExistingFolderOnDrop = true;
2806        }
2807
2808        // Reset the scroll area and previous drag target
2809        onResetScrollArea();
2810        setCurrentDropLayout(null);
2811        setCurrentDragOverlappingLayout(null);
2812
2813        mSpringLoadedDragController.cancel();
2814
2815        if (!mIsPageMoving) {
2816            hideOutlines();
2817        }
2818    }
2819
2820    void setCurrentDropLayout(CellLayout layout) {
2821        if (mDragTargetLayout != null) {
2822            mDragTargetLayout.revertTempState();
2823            mDragTargetLayout.onDragExit();
2824        }
2825        mDragTargetLayout = layout;
2826        if (mDragTargetLayout != null) {
2827            mDragTargetLayout.onDragEnter();
2828        }
2829        cleanupReorder(true);
2830        cleanupFolderCreation();
2831        setCurrentDropOverCell(-1, -1);
2832    }
2833
2834    void setCurrentDragOverlappingLayout(CellLayout layout) {
2835        if (mDragOverlappingLayout != null) {
2836            mDragOverlappingLayout.setIsDragOverlapping(false);
2837        }
2838        mDragOverlappingLayout = layout;
2839        if (mDragOverlappingLayout != null) {
2840            mDragOverlappingLayout.setIsDragOverlapping(true);
2841        }
2842        invalidate();
2843    }
2844
2845    void setCurrentDropOverCell(int x, int y) {
2846        if (x != mDragOverX || y != mDragOverY) {
2847            mDragOverX = x;
2848            mDragOverY = y;
2849            setDragMode(DRAG_MODE_NONE);
2850        }
2851    }
2852
2853    void setDragMode(int dragMode) {
2854        if (dragMode != mDragMode) {
2855            if (dragMode == DRAG_MODE_NONE) {
2856                cleanupAddToFolder();
2857                // We don't want to cancel the re-order alarm every time the target cell changes
2858                // as this feels to slow / unresponsive.
2859                cleanupReorder(false);
2860                cleanupFolderCreation();
2861            } else if (dragMode == DRAG_MODE_ADD_TO_FOLDER) {
2862                cleanupReorder(true);
2863                cleanupFolderCreation();
2864            } else if (dragMode == DRAG_MODE_CREATE_FOLDER) {
2865                cleanupAddToFolder();
2866                cleanupReorder(true);
2867            } else if (dragMode == DRAG_MODE_REORDER) {
2868                cleanupAddToFolder();
2869                cleanupFolderCreation();
2870            }
2871            mDragMode = dragMode;
2872        }
2873    }
2874
2875    private void cleanupFolderCreation() {
2876        if (mDragFolderRingAnimator != null) {
2877            mDragFolderRingAnimator.animateToNaturalState();
2878        }
2879        mFolderCreationAlarm.cancelAlarm();
2880    }
2881
2882    private void cleanupAddToFolder() {
2883        if (mDragOverFolderIcon != null) {
2884            mDragOverFolderIcon.onDragExit(null);
2885            mDragOverFolderIcon = null;
2886        }
2887    }
2888
2889    private void cleanupReorder(boolean cancelAlarm) {
2890        // Any pending reorders are canceled
2891        if (cancelAlarm) {
2892            mReorderAlarm.cancelAlarm();
2893        }
2894        mLastReorderX = -1;
2895        mLastReorderY = -1;
2896    }
2897
2898   /*
2899    *
2900    * Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's
2901    * coordinate space. The argument xy is modified with the return result.
2902    *
2903    * if cachedInverseMatrix is not null, this method will just use that matrix instead of
2904    * computing it itself; we use this to avoid redundant matrix inversions in
2905    * findMatchingPageForDragOver
2906    *
2907    */
2908   void mapPointFromSelfToChild(View v, float[] xy, Matrix cachedInverseMatrix) {
2909       xy[0] = xy[0] - v.getLeft();
2910       xy[1] = xy[1] - v.getTop();
2911   }
2912
2913   boolean isPointInSelfOverHotseat(int x, int y, Rect r) {
2914       if (r == null) {
2915           r = new Rect();
2916       }
2917       mTempPt[0] = x;
2918       mTempPt[1] = y;
2919       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
2920       mLauncher.getHotseat().getHitRect(r);
2921       if (r.contains(mTempPt[0], mTempPt[1])) {
2922           return true;
2923       }
2924       return false;
2925   }
2926
2927   void mapPointFromSelfToHotseatLayout(Hotseat hotseat, float[] xy) {
2928       mTempPt[0] = (int) xy[0];
2929       mTempPt[1] = (int) xy[1];
2930       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
2931       mLauncher.getDragLayer().mapCoordInSelfToDescendent(hotseat.getLayout(), mTempPt);
2932
2933       xy[0] = mTempPt[0];
2934       xy[1] = mTempPt[1];
2935   }
2936
2937   /*
2938    *
2939    * Convert the 2D coordinate xy from this CellLayout's coordinate space to
2940    * the parent View's coordinate space. The argument xy is modified with the return result.
2941    *
2942    */
2943   void mapPointFromChildToSelf(View v, float[] xy) {
2944       xy[0] += v.getLeft();
2945       xy[1] += v.getTop();
2946   }
2947
2948   static private float squaredDistance(float[] point1, float[] point2) {
2949        float distanceX = point1[0] - point2[0];
2950        float distanceY = point2[1] - point2[1];
2951        return distanceX * distanceX + distanceY * distanceY;
2952   }
2953
2954    /*
2955     *
2956     * This method returns the CellLayout that is currently being dragged to. In order to drag
2957     * to a CellLayout, either the touch point must be directly over the CellLayout, or as a second
2958     * strategy, we see if the dragView is overlapping any CellLayout and choose the closest one
2959     *
2960     * Return null if no CellLayout is currently being dragged over
2961     *
2962     */
2963    private CellLayout findMatchingPageForDragOver(
2964            DragView dragView, float originX, float originY, boolean exact) {
2965        // We loop through all the screens (ie CellLayouts) and see which ones overlap
2966        // with the item being dragged and then choose the one that's closest to the touch point
2967        final int screenCount = getChildCount();
2968        CellLayout bestMatchingScreen = null;
2969        float smallestDistSoFar = Float.MAX_VALUE;
2970
2971        for (int i = 0; i < screenCount; i++) {
2972            // The custom content screen is not a valid drag over option
2973            if (mScreenOrder.get(i) == CUSTOM_CONTENT_SCREEN_ID) {
2974                continue;
2975            }
2976
2977            CellLayout cl = (CellLayout) getChildAt(i);
2978
2979            final float[] touchXy = {originX, originY};
2980            // Transform the touch coordinates to the CellLayout's local coordinates
2981            // If the touch point is within the bounds of the cell layout, we can return immediately
2982            cl.getMatrix().invert(mTempInverseMatrix);
2983            mapPointFromSelfToChild(cl, touchXy, mTempInverseMatrix);
2984
2985            if (touchXy[0] >= 0 && touchXy[0] <= cl.getWidth() &&
2986                    touchXy[1] >= 0 && touchXy[1] <= cl.getHeight()) {
2987                return cl;
2988            }
2989
2990            if (!exact) {
2991                // Get the center of the cell layout in screen coordinates
2992                final float[] cellLayoutCenter = mTempCellLayoutCenterCoordinates;
2993                cellLayoutCenter[0] = cl.getWidth()/2;
2994                cellLayoutCenter[1] = cl.getHeight()/2;
2995                mapPointFromChildToSelf(cl, cellLayoutCenter);
2996
2997                touchXy[0] = originX;
2998                touchXy[1] = originY;
2999
3000                // Calculate the distance between the center of the CellLayout
3001                // and the touch point
3002                float dist = squaredDistance(touchXy, cellLayoutCenter);
3003
3004                if (dist < smallestDistSoFar) {
3005                    smallestDistSoFar = dist;
3006                    bestMatchingScreen = cl;
3007                }
3008            }
3009        }
3010        return bestMatchingScreen;
3011    }
3012
3013    // This is used to compute the visual center of the dragView. This point is then
3014    // used to visualize drop locations and determine where to drop an item. The idea is that
3015    // the visual center represents the user's interpretation of where the item is, and hence
3016    // is the appropriate point to use when determining drop location.
3017    private float[] getDragViewVisualCenter(int x, int y, int xOffset, int yOffset,
3018            DragView dragView, float[] recycle) {
3019        float res[];
3020        if (recycle == null) {
3021            res = new float[2];
3022        } else {
3023            res = recycle;
3024        }
3025
3026        // First off, the drag view has been shifted in a way that is not represented in the
3027        // x and y values or the x/yOffsets. Here we account for that shift.
3028        x += getResources().getDimensionPixelSize(R.dimen.dragViewOffsetX);
3029        y += getResources().getDimensionPixelSize(R.dimen.dragViewOffsetY);
3030
3031        // These represent the visual top and left of drag view if a dragRect was provided.
3032        // If a dragRect was not provided, then they correspond to the actual view left and
3033        // top, as the dragRect is in that case taken to be the entire dragView.
3034        // R.dimen.dragViewOffsetY.
3035        int left = x - xOffset;
3036        int top = y - yOffset;
3037
3038        // In order to find the visual center, we shift by half the dragRect
3039        res[0] = left + dragView.getDragRegion().width() / 2;
3040        res[1] = top + dragView.getDragRegion().height() / 2;
3041
3042        return res;
3043    }
3044
3045    private boolean isDragWidget(DragObject d) {
3046        return (d.dragInfo instanceof LauncherAppWidgetInfo ||
3047                d.dragInfo instanceof PendingAddWidgetInfo);
3048    }
3049    private boolean isExternalDragWidget(DragObject d) {
3050        return d.dragSource != this && isDragWidget(d);
3051    }
3052
3053    public void onDragOver(DragObject d) {
3054        // Skip drag over events while we are dragging over side pages
3055        if (mInScrollArea || mIsSwitchingState || mState == State.SMALL) return;
3056
3057        Rect r = new Rect();
3058        CellLayout layout = null;
3059        ItemInfo item = (ItemInfo) d.dragInfo;
3060
3061        // Ensure that we have proper spans for the item that we are dropping
3062        if (item.spanX < 0 || item.spanY < 0) throw new RuntimeException("Improper spans found");
3063        mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset,
3064            d.dragView, mDragViewVisualCenter);
3065
3066        final View child = (mDragInfo == null) ? null : mDragInfo.cell;
3067        // Identify whether we have dragged over a side page
3068        if (isSmall()) {
3069            if (mLauncher.getHotseat() != null && !isExternalDragWidget(d)) {
3070                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3071                    layout = mLauncher.getHotseat().getLayout();
3072                }
3073            }
3074            if (layout == null) {
3075                layout = findMatchingPageForDragOver(d.dragView, d.x, d.y, false);
3076            }
3077            if (layout != mDragTargetLayout) {
3078                setCurrentDropLayout(layout);
3079                setCurrentDragOverlappingLayout(layout);
3080
3081                boolean isInSpringLoadedMode = (mState == State.SPRING_LOADED);
3082                if (isInSpringLoadedMode) {
3083                    if (mLauncher.isHotseatLayout(layout)) {
3084                        mSpringLoadedDragController.cancel();
3085                    } else {
3086                        mSpringLoadedDragController.setAlarm(mDragTargetLayout);
3087                    }
3088                }
3089            }
3090        } else {
3091            // Test to see if we are over the hotseat otherwise just use the current page
3092            if (mLauncher.getHotseat() != null && !isDragWidget(d)) {
3093                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3094                    layout = mLauncher.getHotseat().getLayout();
3095                }
3096            }
3097            if (layout == null) {
3098                layout = getCurrentDropLayout();
3099            }
3100            if (layout != mDragTargetLayout) {
3101                setCurrentDropLayout(layout);
3102                setCurrentDragOverlappingLayout(layout);
3103            }
3104        }
3105
3106        // Handle the drag over
3107        if (mDragTargetLayout != null) {
3108            // We want the point to be mapped to the dragTarget.
3109            if (mLauncher.isHotseatLayout(mDragTargetLayout)) {
3110                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
3111            } else {
3112                mapPointFromSelfToChild(mDragTargetLayout, mDragViewVisualCenter, null);
3113            }
3114
3115            ItemInfo info = (ItemInfo) d.dragInfo;
3116
3117            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3118                    (int) mDragViewVisualCenter[1], item.spanX, item.spanY,
3119                    mDragTargetLayout, mTargetCell);
3120
3121            setCurrentDropOverCell(mTargetCell[0], mTargetCell[1]);
3122
3123            float targetCellDistance = mDragTargetLayout.getDistanceFromCell(
3124                    mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
3125
3126            final View dragOverView = mDragTargetLayout.getChildAt(mTargetCell[0],
3127                    mTargetCell[1]);
3128
3129            manageFolderFeedback(info, mDragTargetLayout, mTargetCell,
3130                    targetCellDistance, dragOverView);
3131
3132            int minSpanX = item.spanX;
3133            int minSpanY = item.spanY;
3134            if (item.minSpanX > 0 && item.minSpanY > 0) {
3135                minSpanX = item.minSpanX;
3136                minSpanY = item.minSpanY;
3137            }
3138
3139            boolean nearestDropOccupied = mDragTargetLayout.isNearestDropLocationOccupied((int)
3140                    mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1], item.spanX,
3141                    item.spanY, child, mTargetCell);
3142
3143            if (!nearestDropOccupied) {
3144                mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3145                        (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3146                        mTargetCell[0], mTargetCell[1], item.spanX, item.spanY, false,
3147                        d.dragView.getDragVisualizeOffset(), d.dragView.getDragRegion());
3148            } else if ((mDragMode == DRAG_MODE_NONE || mDragMode == DRAG_MODE_REORDER)
3149                    && !mReorderAlarm.alarmPending() && (mLastReorderX != mTargetCell[0] ||
3150                    mLastReorderY != mTargetCell[1])) {
3151
3152                // Otherwise, if we aren't adding to or creating a folder and there's no pending
3153                // reorder, then we schedule a reorder
3154                ReorderAlarmListener listener = new ReorderAlarmListener(mDragViewVisualCenter,
3155                        minSpanX, minSpanY, item.spanX, item.spanY, d.dragView, child);
3156                mReorderAlarm.setOnAlarmListener(listener);
3157                mReorderAlarm.setAlarm(REORDER_TIMEOUT);
3158            }
3159
3160            if (mDragMode == DRAG_MODE_CREATE_FOLDER || mDragMode == DRAG_MODE_ADD_TO_FOLDER ||
3161                    !nearestDropOccupied) {
3162                if (mDragTargetLayout != null) {
3163                    mDragTargetLayout.revertTempState();
3164                }
3165            }
3166        }
3167    }
3168
3169    private void manageFolderFeedback(ItemInfo info, CellLayout targetLayout,
3170            int[] targetCell, float distance, View dragOverView) {
3171        boolean userFolderPending = willCreateUserFolder(info, targetLayout, targetCell, distance,
3172                false);
3173
3174        if (mDragMode == DRAG_MODE_NONE && userFolderPending &&
3175                !mFolderCreationAlarm.alarmPending()) {
3176            mFolderCreationAlarm.setOnAlarmListener(new
3177                    FolderCreationAlarmListener(targetLayout, targetCell[0], targetCell[1]));
3178            mFolderCreationAlarm.setAlarm(FOLDER_CREATION_TIMEOUT);
3179            return;
3180        }
3181
3182        boolean willAddToFolder =
3183                willAddToExistingUserFolder(info, targetLayout, targetCell, distance);
3184
3185        if (willAddToFolder && mDragMode == DRAG_MODE_NONE) {
3186            mDragOverFolderIcon = ((FolderIcon) dragOverView);
3187            mDragOverFolderIcon.onDragEnter(info);
3188            if (targetLayout != null) {
3189                targetLayout.clearDragOutlines();
3190            }
3191            setDragMode(DRAG_MODE_ADD_TO_FOLDER);
3192            return;
3193        }
3194
3195        if (mDragMode == DRAG_MODE_ADD_TO_FOLDER && !willAddToFolder) {
3196            setDragMode(DRAG_MODE_NONE);
3197        }
3198        if (mDragMode == DRAG_MODE_CREATE_FOLDER && !userFolderPending) {
3199            setDragMode(DRAG_MODE_NONE);
3200        }
3201
3202        return;
3203    }
3204
3205    class FolderCreationAlarmListener implements OnAlarmListener {
3206        CellLayout layout;
3207        int cellX;
3208        int cellY;
3209
3210        public FolderCreationAlarmListener(CellLayout layout, int cellX, int cellY) {
3211            this.layout = layout;
3212            this.cellX = cellX;
3213            this.cellY = cellY;
3214        }
3215
3216        public void onAlarm(Alarm alarm) {
3217            if (mDragFolderRingAnimator == null) {
3218                mDragFolderRingAnimator = new FolderRingAnimator(mLauncher, null);
3219            }
3220            mDragFolderRingAnimator.setCell(cellX, cellY);
3221            mDragFolderRingAnimator.setCellLayout(layout);
3222            mDragFolderRingAnimator.animateToAcceptState();
3223            layout.showFolderAccept(mDragFolderRingAnimator);
3224            layout.clearDragOutlines();
3225            setDragMode(DRAG_MODE_CREATE_FOLDER);
3226        }
3227    }
3228
3229    class ReorderAlarmListener implements OnAlarmListener {
3230        float[] dragViewCenter;
3231        int minSpanX, minSpanY, spanX, spanY;
3232        DragView dragView;
3233        View child;
3234
3235        public ReorderAlarmListener(float[] dragViewCenter, int minSpanX, int minSpanY, int spanX,
3236                int spanY, DragView dragView, View child) {
3237            this.dragViewCenter = dragViewCenter;
3238            this.minSpanX = minSpanX;
3239            this.minSpanY = minSpanY;
3240            this.spanX = spanX;
3241            this.spanY = spanY;
3242            this.child = child;
3243            this.dragView = dragView;
3244        }
3245
3246        public void onAlarm(Alarm alarm) {
3247            int[] resultSpan = new int[2];
3248            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3249                    (int) mDragViewVisualCenter[1], spanX, spanY, mDragTargetLayout, mTargetCell);
3250            mLastReorderX = mTargetCell[0];
3251            mLastReorderY = mTargetCell[1];
3252
3253            mTargetCell = mDragTargetLayout.createArea((int) mDragViewVisualCenter[0],
3254                (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
3255                child, mTargetCell, resultSpan, CellLayout.MODE_DRAG_OVER);
3256
3257            if (mTargetCell[0] < 0 || mTargetCell[1] < 0) {
3258                mDragTargetLayout.revertTempState();
3259            } else {
3260                setDragMode(DRAG_MODE_REORDER);
3261            }
3262
3263            boolean resize = resultSpan[0] != spanX || resultSpan[1] != spanY;
3264            mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3265                (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3266                mTargetCell[0], mTargetCell[1], resultSpan[0], resultSpan[1], resize,
3267                dragView.getDragVisualizeOffset(), dragView.getDragRegion());
3268        }
3269    }
3270
3271    @Override
3272    public void getHitRectRelativeToDragLayer(Rect outRect) {
3273        // We want the workspace to have the whole area of the display (it will find the correct
3274        // cell layout to drop to in the existing drag/drop logic.
3275        mLauncher.getDragLayer().getDescendantRectRelativeToSelf(this, outRect);
3276    }
3277
3278    /**
3279     * Add the item specified by dragInfo to the given layout.
3280     * @return true if successful
3281     */
3282    public boolean addExternalItemToScreen(ItemInfo dragInfo, CellLayout layout) {
3283        if (layout.findCellForSpan(mTempEstimate, dragInfo.spanX, dragInfo.spanY)) {
3284            onDropExternal(dragInfo.dropPos, (ItemInfo) dragInfo, (CellLayout) layout, false);
3285            return true;
3286        }
3287        mLauncher.showOutOfSpaceMessage(mLauncher.isHotseatLayout(layout));
3288        return false;
3289    }
3290
3291    private void onDropExternal(int[] touchXY, Object dragInfo,
3292            CellLayout cellLayout, boolean insertAtFirst) {
3293        onDropExternal(touchXY, dragInfo, cellLayout, insertAtFirst, null);
3294    }
3295
3296    /**
3297     * Drop an item that didn't originate on one of the workspace screens.
3298     * It may have come from Launcher (e.g. from all apps or customize), or it may have
3299     * come from another app altogether.
3300     *
3301     * NOTE: This can also be called when we are outside of a drag event, when we want
3302     * to add an item to one of the workspace screens.
3303     */
3304    private void onDropExternal(final int[] touchXY, final Object dragInfo,
3305            final CellLayout cellLayout, boolean insertAtFirst, DragObject d) {
3306        final Runnable exitSpringLoadedRunnable = new Runnable() {
3307            @Override
3308            public void run() {
3309                mLauncher.exitSpringLoadedDragModeDelayed(true, false, null);
3310            }
3311        };
3312
3313        ItemInfo info = (ItemInfo) dragInfo;
3314        int spanX = info.spanX;
3315        int spanY = info.spanY;
3316        if (mDragInfo != null) {
3317            spanX = mDragInfo.spanX;
3318            spanY = mDragInfo.spanY;
3319        }
3320
3321        final long container = mLauncher.isHotseatLayout(cellLayout) ?
3322                LauncherSettings.Favorites.CONTAINER_HOTSEAT :
3323                    LauncherSettings.Favorites.CONTAINER_DESKTOP;
3324        final long screenId = getIdForScreen(cellLayout);
3325        if (!mLauncher.isHotseatLayout(cellLayout)
3326                && screenId != getScreenIdForPageIndex(mCurrentPage)
3327                && mState != State.SPRING_LOADED) {
3328            snapToScreenId(screenId, null);
3329        }
3330
3331        if (info instanceof PendingAddItemInfo) {
3332            final PendingAddItemInfo pendingInfo = (PendingAddItemInfo) dragInfo;
3333
3334            boolean findNearestVacantCell = true;
3335            if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
3336                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3337                        cellLayout, mTargetCell);
3338                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3339                        mDragViewVisualCenter[1], mTargetCell);
3340                if (willCreateUserFolder((ItemInfo) d.dragInfo, cellLayout, mTargetCell,
3341                        distance, true) || willAddToExistingUserFolder((ItemInfo) d.dragInfo,
3342                                cellLayout, mTargetCell, distance)) {
3343                    findNearestVacantCell = false;
3344                }
3345            }
3346
3347            final ItemInfo item = (ItemInfo) d.dragInfo;
3348            boolean updateWidgetSize = false;
3349            if (findNearestVacantCell) {
3350                int minSpanX = item.spanX;
3351                int minSpanY = item.spanY;
3352                if (item.minSpanX > 0 && item.minSpanY > 0) {
3353                    minSpanX = item.minSpanX;
3354                    minSpanY = item.minSpanY;
3355                }
3356                int[] resultSpan = new int[2];
3357                mTargetCell = cellLayout.createArea((int) mDragViewVisualCenter[0],
3358                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, info.spanX, info.spanY,
3359                        null, mTargetCell, resultSpan, CellLayout.MODE_ON_DROP_EXTERNAL);
3360
3361                if (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY) {
3362                    updateWidgetSize = true;
3363                }
3364                item.spanX = resultSpan[0];
3365                item.spanY = resultSpan[1];
3366            }
3367
3368            Runnable onAnimationCompleteRunnable = new Runnable() {
3369                @Override
3370                public void run() {
3371                    // When dragging and dropping from customization tray, we deal with creating
3372                    // widgets/shortcuts/folders in a slightly different way
3373                    switch (pendingInfo.itemType) {
3374                    case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
3375                        int span[] = new int[2];
3376                        span[0] = item.spanX;
3377                        span[1] = item.spanY;
3378                        mLauncher.addAppWidgetFromDrop((PendingAddWidgetInfo) pendingInfo,
3379                                container, screenId, mTargetCell, span, null);
3380                        break;
3381                    case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
3382                        mLauncher.processShortcutFromDrop(pendingInfo.componentName,
3383                                container, screenId, mTargetCell, null);
3384                        break;
3385                    default:
3386                        throw new IllegalStateException("Unknown item type: " +
3387                                pendingInfo.itemType);
3388                    }
3389                }
3390            };
3391            View finalView = pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
3392                    ? ((PendingAddWidgetInfo) pendingInfo).boundWidget : null;
3393
3394            if (finalView instanceof AppWidgetHostView && updateWidgetSize) {
3395                AppWidgetHostView awhv = (AppWidgetHostView) finalView;
3396                AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, item.spanX,
3397                        item.spanY);
3398            }
3399
3400            int animationStyle = ANIMATE_INTO_POSITION_AND_DISAPPEAR;
3401            if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET &&
3402                    ((PendingAddWidgetInfo) pendingInfo).info.configure != null) {
3403                animationStyle = ANIMATE_INTO_POSITION_AND_REMAIN;
3404            }
3405            animateWidgetDrop(info, cellLayout, d.dragView, onAnimationCompleteRunnable,
3406                    animationStyle, finalView, true);
3407        } else {
3408            // This is for other drag/drop cases, like dragging from All Apps
3409            View view = null;
3410
3411            switch (info.itemType) {
3412            case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
3413            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
3414                if (info.container == NO_ID && info instanceof AppInfo) {
3415                    // Came from all apps -- make a copy
3416                    info = new ShortcutInfo((AppInfo) info);
3417                }
3418                view = mLauncher.createShortcut(R.layout.application, cellLayout,
3419                        (ShortcutInfo) info);
3420                break;
3421            case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
3422                view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, cellLayout,
3423                        (FolderInfo) info, mIconCache);
3424                break;
3425            default:
3426                throw new IllegalStateException("Unknown item type: " + info.itemType);
3427            }
3428
3429            // First we find the cell nearest to point at which the item is
3430            // dropped, without any consideration to whether there is an item there.
3431            if (touchXY != null) {
3432                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3433                        cellLayout, mTargetCell);
3434                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3435                        mDragViewVisualCenter[1], mTargetCell);
3436                d.postAnimationRunnable = exitSpringLoadedRunnable;
3437                if (createUserFolderIfNecessary(view, container, cellLayout, mTargetCell, distance,
3438                        true, d.dragView, d.postAnimationRunnable)) {
3439                    return;
3440                }
3441                if (addToExistingFolderIfNecessary(view, cellLayout, mTargetCell, distance, d,
3442                        true)) {
3443                    return;
3444                }
3445            }
3446
3447            if (touchXY != null) {
3448                // when dragging and dropping, just find the closest free spot
3449                mTargetCell = cellLayout.createArea((int) mDragViewVisualCenter[0],
3450                        (int) mDragViewVisualCenter[1], 1, 1, 1, 1,
3451                        null, mTargetCell, null, CellLayout.MODE_ON_DROP_EXTERNAL);
3452            } else {
3453                cellLayout.findCellForSpan(mTargetCell, 1, 1);
3454            }
3455            addInScreen(view, container, screenId, mTargetCell[0], mTargetCell[1], info.spanX,
3456                    info.spanY, insertAtFirst);
3457            cellLayout.onDropChild(view);
3458            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams();
3459            cellLayout.getShortcutsAndWidgets().measureChild(view);
3460
3461            LauncherModel.addOrMoveItemInDatabase(mLauncher, info, container, screenId,
3462                    lp.cellX, lp.cellY);
3463
3464            if (d.dragView != null) {
3465                // We wrap the animation call in the temporary set and reset of the current
3466                // cellLayout to its final transform -- this means we animate the drag view to
3467                // the correct final location.
3468                setFinalTransitionTransform(cellLayout);
3469                mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, view,
3470                        exitSpringLoadedRunnable);
3471                resetTransitionTransform(cellLayout);
3472            }
3473        }
3474    }
3475
3476    public Bitmap createWidgetBitmap(ItemInfo widgetInfo, View layout) {
3477        int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(widgetInfo.spanX,
3478                widgetInfo.spanY, widgetInfo, false);
3479        int visibility = layout.getVisibility();
3480        layout.setVisibility(VISIBLE);
3481
3482        int width = MeasureSpec.makeMeasureSpec(unScaledSize[0], MeasureSpec.EXACTLY);
3483        int height = MeasureSpec.makeMeasureSpec(unScaledSize[1], MeasureSpec.EXACTLY);
3484        Bitmap b = Bitmap.createBitmap(unScaledSize[0], unScaledSize[1],
3485                Bitmap.Config.ARGB_8888);
3486        Canvas c = new Canvas(b);
3487
3488        layout.measure(width, height);
3489        layout.layout(0, 0, unScaledSize[0], unScaledSize[1]);
3490        layout.draw(c);
3491        c.setBitmap(null);
3492        layout.setVisibility(visibility);
3493        return b;
3494    }
3495
3496    private void getFinalPositionForDropAnimation(int[] loc, float[] scaleXY,
3497            DragView dragView, CellLayout layout, ItemInfo info, int[] targetCell,
3498            boolean external, boolean scale) {
3499        // Now we animate the dragView, (ie. the widget or shortcut preview) into its final
3500        // location and size on the home screen.
3501        int spanX = info.spanX;
3502        int spanY = info.spanY;
3503
3504        Rect r = estimateItemPosition(layout, info, targetCell[0], targetCell[1], spanX, spanY);
3505        loc[0] = r.left;
3506        loc[1] = r.top;
3507
3508        setFinalTransitionTransform(layout);
3509        float cellLayoutScale =
3510                mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(layout, loc, true);
3511        resetTransitionTransform(layout);
3512
3513        float dragViewScaleX;
3514        float dragViewScaleY;
3515        if (scale) {
3516            dragViewScaleX = (1.0f * r.width()) / dragView.getMeasuredWidth();
3517            dragViewScaleY = (1.0f * r.height()) / dragView.getMeasuredHeight();
3518        } else {
3519            dragViewScaleX = 1f;
3520            dragViewScaleY = 1f;
3521        }
3522
3523        // The animation will scale the dragView about its center, so we need to center about
3524        // the final location.
3525        loc[0] -= (dragView.getMeasuredWidth() - cellLayoutScale * r.width()) / 2;
3526        loc[1] -= (dragView.getMeasuredHeight() - cellLayoutScale * r.height()) / 2;
3527
3528        scaleXY[0] = dragViewScaleX * cellLayoutScale;
3529        scaleXY[1] = dragViewScaleY * cellLayoutScale;
3530    }
3531
3532    public void animateWidgetDrop(ItemInfo info, CellLayout cellLayout, DragView dragView,
3533            final Runnable onCompleteRunnable, int animationType, final View finalView,
3534            boolean external) {
3535        Rect from = new Rect();
3536        mLauncher.getDragLayer().getViewRectRelativeToSelf(dragView, from);
3537
3538        int[] finalPos = new int[2];
3539        float scaleXY[] = new float[2];
3540        boolean scalePreview = !(info instanceof PendingAddShortcutInfo);
3541        getFinalPositionForDropAnimation(finalPos, scaleXY, dragView, cellLayout, info, mTargetCell,
3542                external, scalePreview);
3543
3544        Resources res = mLauncher.getResources();
3545        int duration = res.getInteger(R.integer.config_dropAnimMaxDuration) - 200;
3546
3547        // In the case where we've prebound the widget, we remove it from the DragLayer
3548        if (finalView instanceof AppWidgetHostView && external) {
3549            Log.d(TAG, "6557954 Animate widget drop, final view is appWidgetHostView");
3550            mLauncher.getDragLayer().removeView(finalView);
3551        }
3552        if ((animationType == ANIMATE_INTO_POSITION_AND_RESIZE || external) && finalView != null) {
3553            Bitmap crossFadeBitmap = createWidgetBitmap(info, finalView);
3554            dragView.setCrossFadeBitmap(crossFadeBitmap);
3555            dragView.crossFade((int) (duration * 0.8f));
3556        } else if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET && external) {
3557            scaleXY[0] = scaleXY[1] = Math.min(scaleXY[0],  scaleXY[1]);
3558        }
3559
3560        DragLayer dragLayer = mLauncher.getDragLayer();
3561        if (animationType == CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION) {
3562            mLauncher.getDragLayer().animateViewIntoPosition(dragView, finalPos, 0f, 0.1f, 0.1f,
3563                    DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
3564        } else {
3565            int endStyle;
3566            if (animationType == ANIMATE_INTO_POSITION_AND_REMAIN) {
3567                endStyle = DragLayer.ANIMATION_END_REMAIN_VISIBLE;
3568            } else {
3569                endStyle = DragLayer.ANIMATION_END_DISAPPEAR;;
3570            }
3571
3572            Runnable onComplete = new Runnable() {
3573                @Override
3574                public void run() {
3575                    if (finalView != null) {
3576                        finalView.setVisibility(VISIBLE);
3577                    }
3578                    if (onCompleteRunnable != null) {
3579                        onCompleteRunnable.run();
3580                    }
3581                }
3582            };
3583            dragLayer.animateViewIntoPosition(dragView, from.left, from.top, finalPos[0],
3584                    finalPos[1], 1, 1, 1, scaleXY[0], scaleXY[1], onComplete, endStyle,
3585                    duration, this);
3586        }
3587    }
3588
3589    public void setFinalTransitionTransform(CellLayout layout) {
3590        if (isSwitchingState()) {
3591            mCurrentScale = getScaleX();
3592            setScaleX(mNewScale);
3593            setScaleY(mNewScale);
3594        }
3595    }
3596    public void resetTransitionTransform(CellLayout layout) {
3597        if (isSwitchingState()) {
3598            setScaleX(mCurrentScale);
3599            setScaleY(mCurrentScale);
3600        }
3601    }
3602
3603    /**
3604     * Return the current {@link CellLayout}, correctly picking the destination
3605     * screen while a scroll is in progress.
3606     */
3607    public CellLayout getCurrentDropLayout() {
3608        return (CellLayout) getChildAt(getNextPage());
3609    }
3610
3611    /**
3612     * Return the current CellInfo describing our current drag; this method exists
3613     * so that Launcher can sync this object with the correct info when the activity is created/
3614     * destroyed
3615     *
3616     */
3617    public CellLayout.CellInfo getDragInfo() {
3618        return mDragInfo;
3619    }
3620
3621    /**
3622     * Calculate the nearest cell where the given object would be dropped.
3623     *
3624     * pixelX and pixelY should be in the coordinate system of layout
3625     */
3626    private int[] findNearestArea(int pixelX, int pixelY,
3627            int spanX, int spanY, CellLayout layout, int[] recycle) {
3628        return layout.findNearestArea(
3629                pixelX, pixelY, spanX, spanY, recycle);
3630    }
3631
3632    void setup(DragController dragController) {
3633        mSpringLoadedDragController = new SpringLoadedDragController(mLauncher);
3634        mDragController = dragController;
3635
3636        // hardware layers on children are enabled on startup, but should be disabled until
3637        // needed
3638        updateChildrenLayersEnabled(false);
3639        setWallpaperDimension();
3640    }
3641
3642    /**
3643     * Called at the end of a drag which originated on the workspace.
3644     */
3645    public void onDropCompleted(final View target, final DragObject d,
3646            final boolean isFlingToDelete, final boolean success) {
3647        if (mDeferDropAfterUninstall) {
3648            mDeferredAction = new Runnable() {
3649                    public void run() {
3650                        onDropCompleted(target, d, isFlingToDelete, success);
3651                        mDeferredAction = null;
3652                    }
3653                };
3654            return;
3655        }
3656
3657        boolean beingCalledAfterUninstall = mDeferredAction != null;
3658
3659        if (success && !(beingCalledAfterUninstall && !mUninstallSuccessful)) {
3660            if (target != this && mDragInfo != null) {
3661                CellLayout parentCell = getParentCellLayoutForView(mDragInfo.cell);
3662                if (parentCell != null) {
3663                    parentCell.removeView(mDragInfo.cell);
3664                }
3665                if (mDragInfo.cell instanceof DropTarget) {
3666                    mDragController.removeDropTarget((DropTarget) mDragInfo.cell);
3667                }
3668                // If we move the item to anything not on the Workspace, check if any empty
3669                // screens need to be removed. If we dropped back on the workspace, this will
3670                // be done post drop animation.
3671                stripEmptyScreens();
3672            }
3673        } else if (mDragInfo != null) {
3674            CellLayout cellLayout;
3675            if (mLauncher.isHotseatLayout(target)) {
3676                cellLayout = mLauncher.getHotseat().getLayout();
3677            } else {
3678                cellLayout = getScreenWithId(mDragInfo.screenId);
3679            }
3680            cellLayout.onDropChild(mDragInfo.cell);
3681        }
3682        if ((d.cancelled || (beingCalledAfterUninstall && !mUninstallSuccessful))
3683                && mDragInfo.cell != null) {
3684            mDragInfo.cell.setVisibility(VISIBLE);
3685        }
3686        mDragOutline = null;
3687        mDragInfo = null;
3688    }
3689
3690    public void deferCompleteDropAfterUninstallActivity() {
3691        mDeferDropAfterUninstall = true;
3692    }
3693
3694    /// maybe move this into a smaller part
3695    public void onUninstallActivityReturned(boolean success) {
3696        mDeferDropAfterUninstall = false;
3697        mUninstallSuccessful = success;
3698        if (mDeferredAction != null) {
3699            mDeferredAction.run();
3700        }
3701    }
3702
3703    void updateItemLocationsInDatabase(CellLayout cl) {
3704        int count = cl.getShortcutsAndWidgets().getChildCount();
3705
3706        long screenId = getIdForScreen(cl);
3707        int container = Favorites.CONTAINER_DESKTOP;
3708
3709        if (mLauncher.isHotseatLayout(cl)) {
3710            screenId = -1;
3711            container = Favorites.CONTAINER_HOTSEAT;
3712        }
3713
3714        for (int i = 0; i < count; i++) {
3715            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3716            ItemInfo info = (ItemInfo) v.getTag();
3717            // Null check required as the AllApps button doesn't have an item info
3718            if (info != null && info.requiresDbUpdate) {
3719                info.requiresDbUpdate = false;
3720                LauncherModel.modifyItemInDatabase(mLauncher, info, container, screenId, info.cellX,
3721                        info.cellY, info.spanX, info.spanY);
3722            }
3723        }
3724    }
3725
3726    ArrayList<ComponentName> getUniqueComponents(boolean stripDuplicates, ArrayList<ComponentName> duplicates) {
3727        ArrayList<ComponentName> uniqueIntents = new ArrayList<ComponentName>();
3728        getUniqueIntents((CellLayout) mLauncher.getHotseat().getLayout(), uniqueIntents, duplicates, false);
3729        int count = getChildCount();
3730        for (int i = 0; i < count; i++) {
3731            CellLayout cl = (CellLayout) getChildAt(i);
3732            getUniqueIntents(cl, uniqueIntents, duplicates, false);
3733        }
3734        return uniqueIntents;
3735    }
3736
3737    void getUniqueIntents(CellLayout cl, ArrayList<ComponentName> uniqueIntents,
3738            ArrayList<ComponentName> duplicates, boolean stripDuplicates) {
3739        int count = cl.getShortcutsAndWidgets().getChildCount();
3740
3741        ArrayList<View> children = new ArrayList<View>();
3742        for (int i = 0; i < count; i++) {
3743            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3744            children.add(v);
3745        }
3746
3747        for (int i = 0; i < count; i++) {
3748            View v = children.get(i);
3749            ItemInfo info = (ItemInfo) v.getTag();
3750            // Null check required as the AllApps button doesn't have an item info
3751            if (info instanceof ShortcutInfo) {
3752                ShortcutInfo si = (ShortcutInfo) info;
3753                ComponentName cn = si.intent.getComponent();
3754
3755                Uri dataUri = si.intent.getData();
3756                // If dataUri is not null / empty or if this component isn't one that would
3757                // have previously showed up in the AllApps list, then this is a widget-type
3758                // shortcut, so ignore it.
3759                if (dataUri != null && !dataUri.equals(Uri.EMPTY)) {
3760                    continue;
3761                }
3762
3763                if (!uniqueIntents.contains(cn)) {
3764                    uniqueIntents.add(cn);
3765                } else {
3766                    if (stripDuplicates) {
3767                        cl.removeViewInLayout(v);
3768                        LauncherModel.deleteItemFromDatabase(mLauncher, si);
3769                    }
3770                    if (duplicates != null) {
3771                        duplicates.add(cn);
3772                    }
3773                }
3774            }
3775            if (v instanceof FolderIcon) {
3776                FolderIcon fi = (FolderIcon) v;
3777                ArrayList<View> items = fi.getFolder().getItemsInReadingOrder();
3778                for (int j = 0; j < items.size(); j++) {
3779                    if (items.get(j).getTag() instanceof ShortcutInfo) {
3780                        ShortcutInfo si = (ShortcutInfo) items.get(j).getTag();
3781                        ComponentName cn = si.intent.getComponent();
3782
3783                        Uri dataUri = si.intent.getData();
3784                        // If dataUri is not null / empty or if this component isn't one that would
3785                        // have previously showed up in the AllApps list, then this is a widget-type
3786                        // shortcut, so ignore it.
3787                        if (dataUri != null && !dataUri.equals(Uri.EMPTY)) {
3788                            continue;
3789                        }
3790
3791                        if (!uniqueIntents.contains(cn)) {
3792                            uniqueIntents.add(cn);
3793                        }  else {
3794                            if (stripDuplicates) {
3795                                fi.getFolderInfo().remove(si);
3796                                LauncherModel.deleteItemFromDatabase(mLauncher, si);
3797                            }
3798                            if (duplicates != null) {
3799                                duplicates.add(cn);
3800                            }
3801                        }
3802                    }
3803                }
3804            }
3805        }
3806    }
3807
3808    void saveWorkspaceToDb() {
3809        saveWorkspaceScreenToDb((CellLayout) mLauncher.getHotseat().getLayout());
3810        int count = getChildCount();
3811        for (int i = 0; i < count; i++) {
3812            CellLayout cl = (CellLayout) getChildAt(i);
3813            saveWorkspaceScreenToDb(cl);
3814        }
3815    }
3816
3817    void saveWorkspaceScreenToDb(CellLayout cl) {
3818        int count = cl.getShortcutsAndWidgets().getChildCount();
3819
3820        long screenId = getIdForScreen(cl);
3821        int container = Favorites.CONTAINER_DESKTOP;
3822
3823        Hotseat hotseat = mLauncher.getHotseat();
3824        if (mLauncher.isHotseatLayout(cl)) {
3825            screenId = -1;
3826            container = Favorites.CONTAINER_HOTSEAT;
3827        }
3828
3829        for (int i = 0; i < count; i++) {
3830            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3831            ItemInfo info = (ItemInfo) v.getTag();
3832            // Null check required as the AllApps button doesn't have an item info
3833            if (info != null) {
3834                int cellX = info.cellX;
3835                int cellY = info.cellY;
3836                if (container == Favorites.CONTAINER_HOTSEAT) {
3837                    cellX = hotseat.getCellXFromOrder((int) info.screenId);
3838                    cellY = hotseat.getCellYFromOrder((int) info.screenId);
3839                }
3840                LauncherModel.addItemToDatabase(mLauncher, info, container, screenId, cellX,
3841                        cellY, false);
3842            }
3843            if (v instanceof FolderIcon) {
3844                FolderIcon fi = (FolderIcon) v;
3845                fi.getFolder().addItemLocationsInDatabase();
3846            }
3847        }
3848    }
3849
3850    @Override
3851    public boolean supportsFlingToDelete() {
3852        return true;
3853    }
3854
3855    @Override
3856    public void onFlingToDelete(DragObject d, int x, int y, PointF vec) {
3857        // Do nothing
3858    }
3859
3860    @Override
3861    public void onFlingToDeleteCompleted() {
3862        // Do nothing
3863    }
3864
3865    public boolean isDropEnabled() {
3866        return true;
3867    }
3868
3869    @Override
3870    protected void onRestoreInstanceState(Parcelable state) {
3871        super.onRestoreInstanceState(state);
3872        Launcher.setScreen(mCurrentPage);
3873    }
3874
3875    @Override
3876    protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
3877        // We don't dispatch restoreInstanceState to our children using this code path.
3878        // Some pages will be restored immediately as their items are bound immediately, and
3879        // others we will need to wait until after their items are bound.
3880        mSavedStates = container;
3881    }
3882
3883    public void restoreInstanceStateForChild(int child) {
3884        if (mSavedStates != null) {
3885            mRestoredPages.add(child);
3886            CellLayout cl = (CellLayout) getChildAt(child);
3887            cl.restoreInstanceState(mSavedStates);
3888        }
3889    }
3890
3891    public void restoreInstanceStateForRemainingPages() {
3892        int count = getChildCount();
3893        for (int i = 0; i < count; i++) {
3894            if (!mRestoredPages.contains(i)) {
3895                restoreInstanceStateForChild(i);
3896            }
3897        }
3898        mRestoredPages.clear();
3899    }
3900
3901    @Override
3902    public void scrollLeft() {
3903        if (!isSmall() && !mIsSwitchingState) {
3904            super.scrollLeft();
3905        }
3906        Folder openFolder = getOpenFolder();
3907        if (openFolder != null) {
3908            openFolder.completeDragExit();
3909        }
3910    }
3911
3912    @Override
3913    public void scrollRight() {
3914        if (!isSmall() && !mIsSwitchingState) {
3915            super.scrollRight();
3916        }
3917        Folder openFolder = getOpenFolder();
3918        if (openFolder != null) {
3919            openFolder.completeDragExit();
3920        }
3921    }
3922
3923    @Override
3924    public boolean onEnterScrollArea(int x, int y, int direction) {
3925        // Ignore the scroll area if we are dragging over the hot seat
3926        boolean isPortrait = !LauncherAppState.isScreenLandscape(getContext());
3927        if (mLauncher.getHotseat() != null && isPortrait) {
3928            Rect r = new Rect();
3929            mLauncher.getHotseat().getHitRect(r);
3930            if (r.contains(x, y)) {
3931                return false;
3932            }
3933        }
3934
3935        boolean result = false;
3936        if (!isSmall() && !mIsSwitchingState && getOpenFolder() == null) {
3937            mInScrollArea = true;
3938
3939            final int page = getNextPage() +
3940                       (direction == DragController.SCROLL_LEFT ? -1 : 1);
3941            // We always want to exit the current layout to ensure parity of enter / exit
3942            setCurrentDropLayout(null);
3943
3944            if (0 <= page && page < getChildCount()) {
3945                // Ensure that we are not dragging over to the custom content screen
3946                if (getScreenIdForPageIndex(page) == CUSTOM_CONTENT_SCREEN_ID) {
3947                    return false;
3948                }
3949
3950                CellLayout layout = (CellLayout) getChildAt(page);
3951                setCurrentDragOverlappingLayout(layout);
3952
3953                // Workspace is responsible for drawing the edge glow on adjacent pages,
3954                // so we need to redraw the workspace when this may have changed.
3955                invalidate();
3956                result = true;
3957            }
3958        }
3959        return result;
3960    }
3961
3962    @Override
3963    public boolean onExitScrollArea() {
3964        boolean result = false;
3965        if (mInScrollArea) {
3966            invalidate();
3967            CellLayout layout = getCurrentDropLayout();
3968            setCurrentDropLayout(layout);
3969            setCurrentDragOverlappingLayout(layout);
3970
3971            result = true;
3972            mInScrollArea = false;
3973        }
3974        return result;
3975    }
3976
3977    private void onResetScrollArea() {
3978        setCurrentDragOverlappingLayout(null);
3979        mInScrollArea = false;
3980    }
3981
3982    /**
3983     * Returns a specific CellLayout
3984     */
3985    CellLayout getParentCellLayoutForView(View v) {
3986        ArrayList<CellLayout> layouts = getWorkspaceAndHotseatCellLayouts();
3987        for (CellLayout layout : layouts) {
3988            if (layout.getShortcutsAndWidgets().indexOfChild(v) > -1) {
3989                return layout;
3990            }
3991        }
3992        return null;
3993    }
3994
3995    /**
3996     * Returns a list of all the CellLayouts in the workspace.
3997     */
3998    ArrayList<CellLayout> getWorkspaceAndHotseatCellLayouts() {
3999        ArrayList<CellLayout> layouts = new ArrayList<CellLayout>();
4000        int screenCount = getChildCount();
4001        for (int screen = 0; screen < screenCount; screen++) {
4002            layouts.add(((CellLayout) getChildAt(screen)));
4003        }
4004        if (mLauncher.getHotseat() != null) {
4005            layouts.add(mLauncher.getHotseat().getLayout());
4006        }
4007        return layouts;
4008    }
4009
4010    /**
4011     * We should only use this to search for specific children.  Do not use this method to modify
4012     * ShortcutsAndWidgetsContainer directly. Includes ShortcutAndWidgetContainers from
4013     * the hotseat and workspace pages
4014     */
4015    ArrayList<ShortcutAndWidgetContainer> getAllShortcutAndWidgetContainers() {
4016        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4017                new ArrayList<ShortcutAndWidgetContainer>();
4018        int screenCount = getChildCount();
4019        for (int screen = 0; screen < screenCount; screen++) {
4020            childrenLayouts.add(((CellLayout) getChildAt(screen)).getShortcutsAndWidgets());
4021        }
4022        if (mLauncher.getHotseat() != null) {
4023            childrenLayouts.add(mLauncher.getHotseat().getLayout().getShortcutsAndWidgets());
4024        }
4025        return childrenLayouts;
4026    }
4027
4028    public Folder getFolderForTag(Object tag) {
4029        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4030                getAllShortcutAndWidgetContainers();
4031        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4032            int count = layout.getChildCount();
4033            for (int i = 0; i < count; i++) {
4034                View child = layout.getChildAt(i);
4035                if (child instanceof Folder) {
4036                    Folder f = (Folder) child;
4037                    if (f.getInfo() == tag && f.getInfo().opened) {
4038                        return f;
4039                    }
4040                }
4041            }
4042        }
4043        return null;
4044    }
4045
4046    public View getViewForTag(Object tag) {
4047        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4048                getAllShortcutAndWidgetContainers();
4049        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4050            int count = layout.getChildCount();
4051            for (int i = 0; i < count; i++) {
4052                View child = layout.getChildAt(i);
4053                if (child.getTag() == tag) {
4054                    return child;
4055                }
4056            }
4057        }
4058        return null;
4059    }
4060
4061    void clearDropTargets() {
4062        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4063                getAllShortcutAndWidgetContainers();
4064        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4065            int childCount = layout.getChildCount();
4066            for (int j = 0; j < childCount; j++) {
4067                View v = layout.getChildAt(j);
4068                if (v instanceof DropTarget) {
4069                    mDragController.removeDropTarget((DropTarget) v);
4070                }
4071            }
4072        }
4073    }
4074
4075    // Removes ALL items that match a given package name, this is usually called when a package
4076    // has been removed and we want to remove all components (widgets, shortcuts, apps) that
4077    // belong to that package.
4078    void removeItemsByPackageName(final ArrayList<String> packages) {
4079        final HashSet<String> packageNames = new HashSet<String>();
4080        packageNames.addAll(packages);
4081
4082        // Filter out all the ItemInfos that this is going to affect
4083        final HashSet<ItemInfo> infos = new HashSet<ItemInfo>();
4084        final HashSet<ComponentName> cns = new HashSet<ComponentName>();
4085        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4086        for (CellLayout layoutParent : cellLayouts) {
4087            ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4088            int childCount = layout.getChildCount();
4089            for (int i = 0; i < childCount; ++i) {
4090                View view = layout.getChildAt(i);
4091                infos.add((ItemInfo) view.getTag());
4092            }
4093        }
4094        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4095            @Override
4096            public boolean filterItem(ItemInfo parent, ItemInfo info,
4097                                      ComponentName cn) {
4098                if (packageNames.contains(cn.getPackageName())) {
4099                    cns.add(cn);
4100                    return true;
4101                }
4102                return false;
4103            }
4104        };
4105        LauncherModel.filterItemInfos(infos, filter);
4106
4107        // Remove the affected components
4108        removeItemsByComponentName(cns);
4109    }
4110
4111    // Removes items that match the application info specified, when applications are removed
4112    // as a part of an update, this is called to ensure that other widgets and application
4113    // shortcuts are not removed.
4114    void removeItemsByApplicationInfo(final ArrayList<AppInfo> appInfos) {
4115        // Just create a hash table of all the specific components that this will affect
4116        HashSet<ComponentName> cns = new HashSet<ComponentName>();
4117        for (AppInfo info : appInfos) {
4118            cns.add(info.componentName);
4119        }
4120
4121        // Remove all the things
4122        removeItemsByComponentName(cns);
4123    }
4124
4125    void removeItemsByComponentName(final HashSet<ComponentName> componentNames) {
4126        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4127        for (final CellLayout layoutParent: cellLayouts) {
4128            final ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4129
4130            final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
4131            for (int j = 0; j < layout.getChildCount(); j++) {
4132                final View view = layout.getChildAt(j);
4133                children.put((ItemInfo) view.getTag(), view);
4134            }
4135
4136            final ArrayList<View> childrenToRemove = new ArrayList<View>();
4137            final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove =
4138                    new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
4139            LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4140                @Override
4141                public boolean filterItem(ItemInfo parent, ItemInfo info,
4142                                          ComponentName cn) {
4143                    if (parent instanceof FolderInfo) {
4144                        if (componentNames.contains(cn)) {
4145                            FolderInfo folder = (FolderInfo) parent;
4146                            ArrayList<ShortcutInfo> appsToRemove;
4147                            if (folderAppsToRemove.containsKey(folder)) {
4148                                appsToRemove = folderAppsToRemove.get(folder);
4149                            } else {
4150                                appsToRemove = new ArrayList<ShortcutInfo>();
4151                                folderAppsToRemove.put(folder, appsToRemove);
4152                            }
4153                            appsToRemove.add((ShortcutInfo) info);
4154                            return true;
4155                        }
4156                    } else {
4157                        if (componentNames.contains(cn)) {
4158                            childrenToRemove.add(children.get(info));
4159                            return true;
4160                        }
4161                    }
4162                    return false;
4163                }
4164            };
4165            LauncherModel.filterItemInfos(children.keySet(), filter);
4166
4167            // Remove all the apps from their folders
4168            for (FolderInfo folder : folderAppsToRemove.keySet()) {
4169                ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
4170                for (ShortcutInfo info : appsToRemove) {
4171                    folder.remove(info);
4172                }
4173            }
4174
4175            // Remove all the other children
4176            for (View child : childrenToRemove) {
4177                // Note: We can not remove the view directly from CellLayoutChildren as this
4178                // does not re-mark the spaces as unoccupied.
4179                layoutParent.removeViewInLayout(child);
4180                if (child instanceof DropTarget) {
4181                    mDragController.removeDropTarget((DropTarget) child);
4182                }
4183            }
4184
4185            if (childrenToRemove.size() > 0) {
4186                layout.requestLayout();
4187                layout.invalidate();
4188            }
4189        }
4190
4191        // Strip all the empty screens
4192        stripEmptyScreens();
4193    }
4194
4195    void updateShortcuts(ArrayList<AppInfo> apps) {
4196        ArrayList<ShortcutAndWidgetContainer> childrenLayouts = getAllShortcutAndWidgetContainers();
4197        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4198            int childCount = layout.getChildCount();
4199            for (int j = 0; j < childCount; j++) {
4200                final View view = layout.getChildAt(j);
4201                Object tag = view.getTag();
4202
4203                if (LauncherModel.isShortcutInfoUpdateable((ItemInfo) tag)) {
4204                    ShortcutInfo info = (ShortcutInfo) tag;
4205
4206                    final Intent intent = info.intent;
4207                    final ComponentName name = intent.getComponent();
4208                    final int appCount = apps.size();
4209                    for (int k = 0; k < appCount; k++) {
4210                        AppInfo app = apps.get(k);
4211                        if (app.componentName.equals(name)) {
4212                            BubbleTextView shortcut = (BubbleTextView) view;
4213                            info.updateIcon(mIconCache);
4214                            info.title = app.title.toString();
4215                            shortcut.applyFromShortcutInfo(info, mIconCache);
4216                        }
4217                    }
4218                }
4219            }
4220        }
4221    }
4222
4223    private void moveToScreen(int page, boolean animate) {
4224        if (!isSmall()) {
4225            if (animate) {
4226                snapToPage(page);
4227            } else {
4228                setCurrentPage(page);
4229            }
4230        }
4231        View child = getChildAt(page);
4232        if (child != null) {
4233            child.requestFocus();
4234        }
4235    }
4236
4237    void moveToDefaultScreen(boolean animate) {
4238        moveToScreen(mDefaultPage, animate);
4239    }
4240
4241    void moveToCustomContentScreen(boolean animate) {
4242        if (hasCustomContent()) {
4243            int ccIndex = getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID);
4244            if (animate) {
4245                snapToPage(ccIndex);
4246            } else {
4247                setCurrentPage(ccIndex);
4248            }
4249            View child = getChildAt(ccIndex);
4250            if (child != null) {
4251                child.requestFocus();
4252            }
4253         }
4254    }
4255
4256    @Override
4257    protected PageIndicator.PageMarkerResources getPageIndicatorMarker(int pageIndex) {
4258        long screenId = getScreenIdForPageIndex(pageIndex);
4259        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
4260            int count = mScreenOrder.size() - (hasCustomContent() ? 1 : 0);
4261            if (count > 1) {
4262                return new PageIndicator.PageMarkerResources(R.drawable.ic_pageindicator_add,
4263                        R.drawable.ic_pageindicator_add);
4264            }
4265        }
4266
4267        return super.getPageIndicatorMarker(pageIndex);
4268    }
4269
4270    @Override
4271    public void syncPages() {
4272    }
4273
4274    @Override
4275    public void syncPageItems(int page, boolean immediate) {
4276    }
4277
4278    protected String getCurrentPageDescription() {
4279        int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
4280        return String.format(getContext().getString(R.string.workspace_scroll_format),
4281                page + 1, getChildCount());
4282    }
4283
4284    public void getLocationInDragLayer(int[] loc) {
4285        mLauncher.getDragLayer().getLocationInDragLayer(this, loc);
4286    }
4287}
4288