Workspace.java revision 89f9705077c054b541af7da52be832760e2ae2e8 
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
174    // State variable that indicates whether the pages are small (ie when you're
175    // in all apps or customize mode)
176
177    enum State { NORMAL, SPRING_LOADED, SMALL, OVERVIEW};
178    private State mState = State.NORMAL;
179    private boolean mIsSwitchingState = false;
180
181    boolean mAnimatingViewIntoPlace = false;
182    boolean mIsDragOccuring = false;
183    boolean mChildrenLayersEnabled = true;
184
185    private boolean mStripScreensOnPageStopMoving = false;
186
187    /** Is the user is dragging an item near the edge of a page? */
188    private boolean mInScrollArea = false;
189
190    private HolographicOutlineHelper mOutlineHelper;
191    private Bitmap mDragOutline = null;
192    private final Rect mTempRect = new Rect();
193    private final int[] mTempXY = new int[2];
194    private int[] mTempVisiblePagesRange = new int[2];
195    private boolean mOverscrollTransformsSet;
196    public static final int DRAG_BITMAP_PADDING = 2;
197    private boolean mWorkspaceFadeInAdjacentScreens;
198
199    WallpaperOffsetInterpolator mWallpaperOffset;
200    private Runnable mDelayedResizeRunnable;
201    private Runnable mDelayedSnapToPageRunnable;
202    private Point mDisplaySize = new Point();
203    private int mCameraDistance;
204
205    // Variables relating to the creation of user folders by hovering shortcuts over shortcuts
206    private static final int FOLDER_CREATION_TIMEOUT = 0;
207    private static final int REORDER_TIMEOUT = 250;
208    private final Alarm mFolderCreationAlarm = new Alarm();
209    private final Alarm mReorderAlarm = new Alarm();
210    private FolderRingAnimator mDragFolderRingAnimator = null;
211    private FolderIcon mDragOverFolderIcon = null;
212    private boolean mCreateUserFolderOnDrop = false;
213    private boolean mAddToExistingFolderOnDrop = false;
214    private DropTarget.DragEnforcer mDragEnforcer;
215    private float mMaxDistanceForFolderCreation;
216
217    // Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
218    private float mXDown;
219    private float mYDown;
220    final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
221    final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
222    final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
223
224    // Relating to the animation of items being dropped externally
225    public static final int ANIMATE_INTO_POSITION_AND_DISAPPEAR = 0;
226    public static final int ANIMATE_INTO_POSITION_AND_REMAIN = 1;
227    public static final int ANIMATE_INTO_POSITION_AND_RESIZE = 2;
228    public static final int COMPLETE_TWO_STAGE_WIDGET_DROP_ANIMATION = 3;
229    public static final int CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION = 4;
230
231    // Related to dragging, folder creation and reordering
232    private static final int DRAG_MODE_NONE = 0;
233    private static final int DRAG_MODE_CREATE_FOLDER = 1;
234    private static final int DRAG_MODE_ADD_TO_FOLDER = 2;
235    private static final int DRAG_MODE_REORDER = 3;
236    private int mDragMode = DRAG_MODE_NONE;
237    private int mLastReorderX = -1;
238    private int mLastReorderY = -1;
239
240    private SparseArray<Parcelable> mSavedStates;
241    private final ArrayList<Integer> mRestoredPages = new ArrayList<Integer>();
242
243    // These variables are used for storing the initial and final values during workspace animations
244    private int mSavedScrollX;
245    private float mSavedRotationY;
246    private float mSavedTranslationX;
247
248    private float mCurrentScale;
249    private float mNewScale;
250    private float[] mOldBackgroundAlphas;
251    private float[] mOldAlphas;
252    private float[] mNewBackgroundAlphas;
253    private float[] mNewAlphas;
254    private int mLastChildCount = -1;
255    private float mTransitionProgress;
256
257    private Runnable mDeferredAction;
258    private boolean mDeferDropAfterUninstall;
259    private boolean mUninstallSuccessful;
260
261    private final Runnable mBindPages = new Runnable() {
262        @Override
263        public void run() {
264            mLauncher.getModel().bindRemainingSynchronousPages();
265        }
266    };
267
268    /**
269     * Used to inflate the Workspace from XML.
270     *
271     * @param context The application's context.
272     * @param attrs The attributes set containing the Workspace's customization values.
273     */
274    public Workspace(Context context, AttributeSet attrs) {
275        this(context, attrs, 0);
276    }
277
278    /**
279     * Used to inflate the Workspace from XML.
280     *
281     * @param context The application's context.
282     * @param attrs The attributes set containing the Workspace's customization values.
283     * @param defStyle Unused.
284     */
285    public Workspace(Context context, AttributeSet attrs, int defStyle) {
286        super(context, attrs, defStyle);
287        mContentIsRefreshable = false;
288
289        mOutlineHelper = HolographicOutlineHelper.obtain(context);
290
291        mDragEnforcer = new DropTarget.DragEnforcer(context);
292        // With workspace, data is available straight from the get-go
293        setDataIsReady();
294
295        mLauncher = (Launcher) context;
296        final Resources res = getResources();
297        mWorkspaceFadeInAdjacentScreens = res.getBoolean(R.bool.config_workspaceFadeAdjacentScreens);
298        mFadeInAdjacentScreens = false;
299        mWallpaperManager = WallpaperManager.getInstance(context);
300
301        TypedArray a = context.obtainStyledAttributes(attrs,
302                R.styleable.Workspace, defStyle, 0);
303        mSpringLoadedShrinkFactor =
304            res.getInteger(R.integer.config_workspaceSpringLoadShrinkPercentage) / 100.0f;
305        mOverviewModeShrinkFactor =
306                res.getInteger(R.integer.config_workspaceOverviewShrinkPercentage) / 100.0f;
307        mCameraDistance = res.getInteger(R.integer.config_cameraDistance);
308        mOriginalDefaultPage = mDefaultPage = a.getInt(R.styleable.Workspace_defaultScreen, 1);
309        a.recycle();
310
311        setOnHierarchyChangeListener(this);
312        setHapticFeedbackEnabled(false);
313
314        initWorkspace();
315
316        // Disable multitouch across the workspace/all apps/customize tray
317        setMotionEventSplittingEnabled(true);
318
319        // Unless otherwise specified this view is important for accessibility.
320        if (getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
321            setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
322        }
323    }
324
325    @Override
326    public void setInsets(Rect insets) {
327        mInsets.set(insets);
328    }
329
330    // estimate the size of a widget with spans hSpan, vSpan. return MAX_VALUE for each
331    // dimension if unsuccessful
332    public int[] estimateItemSize(int hSpan, int vSpan,
333            ItemInfo itemInfo, boolean springLoaded) {
334        int[] size = new int[2];
335        if (getChildCount() > 0) {
336            CellLayout cl = (CellLayout) mLauncher.getWorkspace().getChildAt(0);
337            Rect r = estimateItemPosition(cl, itemInfo, 0, 0, hSpan, vSpan);
338            size[0] = r.width();
339            size[1] = r.height();
340            if (springLoaded) {
341                size[0] *= mSpringLoadedShrinkFactor;
342                size[1] *= mSpringLoadedShrinkFactor;
343            }
344            return size;
345        } else {
346            size[0] = Integer.MAX_VALUE;
347            size[1] = Integer.MAX_VALUE;
348            return size;
349        }
350    }
351
352    public Rect estimateItemPosition(CellLayout cl, ItemInfo pendingInfo,
353            int hCell, int vCell, int hSpan, int vSpan) {
354        Rect r = new Rect();
355        cl.cellToRect(hCell, vCell, hSpan, vSpan, r);
356        return r;
357    }
358
359    public void onDragStart(final DragSource source, Object info, int dragAction) {
360        mIsDragOccuring = true;
361        updateChildrenLayersEnabled(false);
362        mLauncher.lockScreenOrientation();
363        mLauncher.onInteractionBegin();
364        setChildrenBackgroundAlphaMultipliers(1f);
365        // Prevent any Un/InstallShortcutReceivers from updating the db while we are dragging
366        InstallShortcutReceiver.enableInstallQueue();
367        UninstallShortcutReceiver.enableUninstallQueue();
368        post(new Runnable() {
369            @Override
370            public void run() {
371                if (mIsDragOccuring) {
372                    addExtraEmptyScreenOnDrag();
373                }
374            }
375        });
376    }
377
378    public void onDragEnd() {
379        mIsDragOccuring = false;
380        updateChildrenLayersEnabled(false);
381        mLauncher.unlockScreenOrientation(false);
382
383        // Re-enable any Un/InstallShortcutReceiver and now process any queued items
384        InstallShortcutReceiver.disableAndFlushInstallQueue(getContext());
385        UninstallShortcutReceiver.disableAndFlushUninstallQueue(getContext());
386
387        removeExtraEmptyScreen();
388        mDragSourceInternal = null;
389        mLauncher.onInteractionEnd();
390    }
391
392    /**
393     * Initializes various states for this workspace.
394     */
395    protected void initWorkspace() {
396        Context context = getContext();
397        mCurrentPage = mDefaultPage;
398        Launcher.setScreen(mCurrentPage);
399        LauncherAppState app = LauncherAppState.getInstance();
400        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
401        mIconCache = app.getIconCache();
402        setWillNotDraw(false);
403        setClipChildren(false);
404        setClipToPadding(false);
405        setChildrenDrawnWithCacheEnabled(true);
406        setMinScale(0.5f);
407        setupLayoutTransition();
408
409        final Resources res = getResources();
410        try {
411            mBackground = res.getDrawable(R.drawable.apps_customize_bg);
412        } catch (Resources.NotFoundException e) {
413            // In this case, we will skip drawing background protection
414        }
415
416        mWallpaperOffset = new WallpaperOffsetInterpolator();
417        Display display = mLauncher.getWindowManager().getDefaultDisplay();
418        display.getSize(mDisplaySize);
419
420        mMaxDistanceForFolderCreation = (0.55f * grid.iconSizePx);
421        mFlingThresholdVelocity = (int) (FLING_THRESHOLD_VELOCITY * mDensity);
422    }
423
424    private void setupLayoutTransition() {
425        // We want to show layout transitions when pages are deleted, to close the gap.
426        mLayoutTransition = new LayoutTransition();
427        mLayoutTransition.enableTransitionType(LayoutTransition.DISAPPEARING);
428        mLayoutTransition.enableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
429        mLayoutTransition.disableTransitionType(LayoutTransition.APPEARING);
430        mLayoutTransition.disableTransitionType(LayoutTransition.CHANGE_APPEARING);
431        setLayoutTransition(mLayoutTransition);
432    }
433
434    @Override
435    protected int getScrollMode() {
436        return SmoothPagedView.X_LARGE_MODE;
437    }
438
439    @Override
440    public void onChildViewAdded(View parent, View child) {
441        if (!(child instanceof CellLayout)) {
442            throw new IllegalArgumentException("A Workspace can only have CellLayout children.");
443        }
444        CellLayout cl = ((CellLayout) child);
445        cl.setOnInterceptTouchListener(this);
446        cl.setClickable(true);
447        cl.setContentDescription(getContext().getString(
448                R.string.workspace_description_format, getChildCount()));
449
450        super.onChildViewAdded(parent, child);
451    }
452
453    protected boolean shouldDrawChild(View child) {
454        final CellLayout cl = (CellLayout) child;
455        return super.shouldDrawChild(child) &&
456            (cl.getShortcutsAndWidgets().getAlpha() > 0 ||
457             cl.getBackgroundAlpha() > 0);
458    }
459
460    /**
461     * @return The open folder on the current screen, or null if there is none
462     */
463    Folder getOpenFolder() {
464        DragLayer dragLayer = mLauncher.getDragLayer();
465        int count = dragLayer.getChildCount();
466        for (int i = 0; i < count; i++) {
467            View child = dragLayer.getChildAt(i);
468            if (child instanceof Folder) {
469                Folder folder = (Folder) child;
470                if (folder.getInfo().opened)
471                    return folder;
472            }
473        }
474        return null;
475    }
476
477    boolean isTouchActive() {
478        return mTouchState != TOUCH_STATE_REST;
479    }
480
481    public void removeAllWorkspaceScreens() {
482        // Remove the pages and clear the screen models
483        removeAllViews();
484        mScreenOrder.clear();
485        mWorkspaceScreens.clear();
486    }
487
488    public long insertNewWorkspaceScreenBeforeEmptyScreen(long screenId) {
489        // Find the index to insert this view into.  If the empty screen exists, then
490        // insert it before that.
491        int insertIndex = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
492        if (insertIndex < 0) {
493            insertIndex = mScreenOrder.size();
494        }
495        return insertNewWorkspaceScreen(screenId, insertIndex);
496    }
497
498    public long insertNewWorkspaceScreen(long screenId) {
499        return insertNewWorkspaceScreen(screenId, getChildCount());
500    }
501
502    public long insertNewWorkspaceScreen(long screenId, int insertIndex) {
503        if (mWorkspaceScreens.containsKey(screenId)) {
504            throw new RuntimeException("Screen id " + screenId + " already exists!");
505        }
506
507        CellLayout newScreen = (CellLayout)
508                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
509
510        newScreen.setOnLongClickListener(mLongClickListener);
511        newScreen.setOnClickListener(mLauncher);
512        newScreen.setSoundEffectsEnabled(false);
513        mWorkspaceScreens.put(screenId, newScreen);
514        mScreenOrder.add(insertIndex, screenId);
515        addView(newScreen, insertIndex);
516        return screenId;
517    }
518
519    public void createCustomContentPage() {
520        CellLayout customScreen = (CellLayout)
521                mLauncher.getLayoutInflater().inflate(R.layout.workspace_screen, null);
522
523        mWorkspaceScreens.put(CUSTOM_CONTENT_SCREEN_ID, customScreen);
524        mScreenOrder.add(0, CUSTOM_CONTENT_SCREEN_ID);
525
526        // We want no padding on the custom content
527        customScreen.setPadding(0, 0, 0, 0);
528
529        addFullScreenPage(customScreen);
530
531        // Ensure that the current page and default page are maintained.
532        mDefaultPage = mOriginalDefaultPage + 1;
533        setCurrentPage(getCurrentPage() + 1);
534    }
535
536    public void removeCustomContentPage() {
537        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
538        if (customScreen == null) {
539            throw new RuntimeException("Expected custom content screen to exist");
540        }
541
542        mWorkspaceScreens.remove(CUSTOM_CONTENT_SCREEN_ID);
543        mScreenOrder.remove(CUSTOM_CONTENT_SCREEN_ID);
544        removeView(customScreen);
545        mCustomContentCallbacks = null;
546
547        // Ensure that the current page and default page are maintained.
548        mDefaultPage = mOriginalDefaultPage - 1;
549        setCurrentPage(getCurrentPage() - 1);
550    }
551
552    public void addToCustomContentPage(View customContent, CustomContentCallbacks callbacks) {
553        if (getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID) < 0) {
554            throw new RuntimeException("Expected custom content screen to exist");
555        }
556
557        // Add the custom content to the full screen custom page
558        CellLayout customScreen = getScreenWithId(CUSTOM_CONTENT_SCREEN_ID);
559        int spanX = customScreen.getCountX();
560        int spanY = customScreen.getCountY();
561        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, spanX, spanY);
562        lp.canReorder  = false;
563        lp.isFullscreen = true;
564        if (customContent instanceof Insettable) {
565            ((Insettable)customContent).setInsets(mInsets);
566        }
567        customScreen.addViewToCellLayout(customContent, 0, 0, lp, true);
568
569        mCustomContentCallbacks = callbacks;
570    }
571
572    public void addExtraEmptyScreenOnDrag() {
573        boolean lastChildOnScreen = false;
574        boolean childOnFinalScreen = false;
575
576        if (mDragSourceInternal != null) {
577            if (mDragSourceInternal.getChildCount() == 1) {
578                lastChildOnScreen = true;
579            }
580            CellLayout cl = (CellLayout) mDragSourceInternal.getParent();
581            if (indexOfChild(cl) == getChildCount() - 1) {
582                childOnFinalScreen = true;
583            }
584        }
585
586        // If this is the last item on the final screen
587        if (lastChildOnScreen && childOnFinalScreen) {
588            return;
589        }
590        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
591            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
592        }
593    }
594
595    public boolean addExtraEmptyScreen() {
596        if (!mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)) {
597            insertNewWorkspaceScreen(EXTRA_EMPTY_SCREEN_ID);
598            return true;
599        }
600        return false;
601    }
602
603    public void removeExtraEmptyScreen() {
604        if (hasExtraEmptyScreen()) {
605            CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
606            mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
607            mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
608            removeView(cl);
609        }
610    }
611
612    public boolean hasExtraEmptyScreen() {
613        int nScreens = getChildCount();
614        nScreens = hasCustomContent() ? nScreens - 1 : nScreens;
615        return mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID) && nScreens > 1;
616    }
617
618    public long commitExtraEmptyScreen() {
619        int index = getPageIndexForScreenId(EXTRA_EMPTY_SCREEN_ID);
620        CellLayout cl = mWorkspaceScreens.get(EXTRA_EMPTY_SCREEN_ID);
621        mWorkspaceScreens.remove(EXTRA_EMPTY_SCREEN_ID);
622        mScreenOrder.remove(EXTRA_EMPTY_SCREEN_ID);
623
624        long newId = LauncherAppState.getLauncherProvider().generateNewScreenId();
625        mWorkspaceScreens.put(newId, cl);
626        mScreenOrder.add(newId);
627
628        // Update the page indicator marker
629        if (getPageIndicator() != null) {
630            getPageIndicator().updateMarker(index, getPageIndicatorMarker(index));
631        }
632
633        // Update the model for the new screen
634        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
635
636        return newId;
637    }
638
639
640    public CellLayout getScreenWithId(long screenId) {
641        CellLayout layout = mWorkspaceScreens.get(screenId);
642        return layout;
643    }
644
645    public long getIdForScreen(CellLayout layout) {
646        Iterator<Long> iter = mWorkspaceScreens.keySet().iterator();
647        while (iter.hasNext()) {
648            long id = iter.next();
649            if (mWorkspaceScreens.get(id) == layout) {
650                return id;
651            }
652        }
653        return -1;
654    }
655
656    public int getPageIndexForScreenId(long screenId) {
657        return indexOfChild(mWorkspaceScreens.get(screenId));
658    }
659
660    public long getScreenIdForPageIndex(int index) {
661        if (0 <= index && index < mScreenOrder.size()) {
662            return mScreenOrder.get(index);
663        }
664        return -1;
665    }
666
667    ArrayList<Long> getScreenOrder() {
668        return mScreenOrder;
669    }
670
671    public void stripEmptyScreens() {
672        if (isPageMoving()) {
673            mStripScreensOnPageStopMoving = true;
674            return;
675        }
676
677        int currentPage = getNextPage();
678        ArrayList<Long> removeScreens = new ArrayList<Long>();
679        for (Long id: mWorkspaceScreens.keySet()) {
680            CellLayout cl = mWorkspaceScreens.get(id);
681            if (id >= 0 && cl.getShortcutsAndWidgets().getChildCount() == 0) {
682                removeScreens.add(id);
683            }
684        }
685
686        // We enforce at least one page to add new items to. In the case that we remove the last
687        // such screen, we convert the last screen to the empty screen
688        int minScreens = hasCustomContent() ? 2 : 1;
689
690        int pageShift = 0;
691        for (Long id: removeScreens) {
692            CellLayout cl = mWorkspaceScreens.get(id);
693            mWorkspaceScreens.remove(id);
694            mScreenOrder.remove(id);
695
696            if (getChildCount() > minScreens) {
697                if (indexOfChild(cl) < currentPage) {
698                    pageShift++;
699                }
700                removeView(cl);
701            } else {
702                // if this is the last non-custom content screen, convert it to the empty screen
703                mWorkspaceScreens.put(EXTRA_EMPTY_SCREEN_ID, cl);
704                mScreenOrder.add(EXTRA_EMPTY_SCREEN_ID);
705            }
706        }
707
708        if (!removeScreens.isEmpty()) {
709            // Update the model if we have changed any screens
710            mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
711        }
712
713        if (pageShift >= 0) {
714            setCurrentPage(currentPage - pageShift);
715        }
716    }
717
718    // See implementation for parameter definition.
719    void addInScreen(View child, long container, long screenId,
720            int x, int y, int spanX, int spanY) {
721        addInScreen(child, container, screenId, x, y, spanX, spanY, false, false);
722    }
723
724    // At bind time, we use the rank (screenId) to compute x and y for hotseat items.
725    // See implementation for parameter definition.
726    void addInScreenFromBind(View child, long container, long screenId, int x, int y,
727            int spanX, int spanY) {
728        addInScreen(child, container, screenId, x, y, spanX, spanY, false, true);
729    }
730
731    // See implementation for parameter definition.
732    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
733            boolean insert) {
734        addInScreen(child, container, screenId, x, y, spanX, spanY, insert, false);
735    }
736
737    /**
738     * Adds the specified child in the specified screen. The position and dimension of
739     * the child are defined by x, y, spanX and spanY.
740     *
741     * @param child The child to add in one of the workspace's screens.
742     * @param screenId The screen in which to add the child.
743     * @param x The X position of the child in the screen's grid.
744     * @param y The Y position of the child in the screen's grid.
745     * @param spanX The number of cells spanned horizontally by the child.
746     * @param spanY The number of cells spanned vertically by the child.
747     * @param insert When true, the child is inserted at the beginning of the children list.
748     * @param computeXYFromRank When true, we use the rank (stored in screenId) to compute
749     *                          the x and y position in which to place hotseat items. Otherwise
750     *                          we use the x and y position to compute the rank.
751     */
752    void addInScreen(View child, long container, long screenId, int x, int y, int spanX, int spanY,
753            boolean insert, boolean computeXYFromRank) {
754        if (container == LauncherSettings.Favorites.CONTAINER_DESKTOP) {
755            if (getScreenWithId(screenId) == null) {
756                Log.e(TAG, "Skipping child, screenId " + screenId + " not found");
757                // DEBUGGING - Print out the stack trace to see where we are adding from
758                new Throwable().printStackTrace();
759                return;
760            }
761        }
762        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
763            // This should never happen
764            throw new RuntimeException("Screen id should not be EXTRA_EMPTY_SCREEN_ID");
765        }
766
767        final CellLayout layout;
768        if (container == LauncherSettings.Favorites.CONTAINER_HOTSEAT) {
769            layout = mLauncher.getHotseat().getLayout();
770            child.setOnKeyListener(null);
771
772            // Hide folder title in the hotseat
773            if (child instanceof FolderIcon) {
774                ((FolderIcon) child).setTextVisible(false);
775            }
776
777            if (computeXYFromRank) {
778                x = mLauncher.getHotseat().getCellXFromOrder((int) screenId);
779                y = mLauncher.getHotseat().getCellYFromOrder((int) screenId);
780            } else {
781                screenId = mLauncher.getHotseat().getOrderInHotseat(x, y);
782            }
783        } else {
784            // Show folder title if not in the hotseat
785            if (child instanceof FolderIcon) {
786                ((FolderIcon) child).setTextVisible(true);
787            }
788            layout = getScreenWithId(screenId);
789            child.setOnKeyListener(new IconKeyEventListener());
790        }
791
792        ViewGroup.LayoutParams genericLp = child.getLayoutParams();
793        CellLayout.LayoutParams lp;
794        if (genericLp == null || !(genericLp instanceof CellLayout.LayoutParams)) {
795            lp = new CellLayout.LayoutParams(x, y, spanX, spanY);
796        } else {
797            lp = (CellLayout.LayoutParams) genericLp;
798            lp.cellX = x;
799            lp.cellY = y;
800            lp.cellHSpan = spanX;
801            lp.cellVSpan = spanY;
802        }
803
804        if (spanX < 0 && spanY < 0) {
805            lp.isLockedToGrid = false;
806        }
807
808        // Get the canonical child id to uniquely represent this view in this screen
809        int childId = LauncherModel.getCellLayoutChildId(container, screenId, x, y, spanX, spanY);
810        boolean markCellsAsOccupied = !(child instanceof Folder);
811        if (!layout.addViewToCellLayout(child, insert ? 0 : -1, childId, lp, markCellsAsOccupied)) {
812            // TODO: This branch occurs when the workspace is adding views
813            // outside of the defined grid
814            // maybe we should be deleting these items from the LauncherModel?
815            Launcher.addDumpLog(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout", true);
816        }
817
818        if (!(child instanceof Folder)) {
819            child.setHapticFeedbackEnabled(false);
820            child.setOnLongClickListener(mLongClickListener);
821        }
822        if (child instanceof DropTarget) {
823            mDragController.addDropTarget((DropTarget) child);
824        }
825    }
826
827    /**
828     * Called directly from a CellLayout (not by the framework), after we've been added as a
829     * listener via setOnInterceptTouchEventListener(). This allows us to tell the CellLayout
830     * that it should intercept touch events, which is not something that is normally supported.
831     */
832    @Override
833    public boolean onTouch(View v, MotionEvent event) {
834        return (isSmall() || !isFinishedSwitchingState())
835                || (!isSmall() && indexOfChild(v) != mCurrentPage);
836    }
837
838    public boolean isSwitchingState() {
839        return mIsSwitchingState;
840    }
841
842    /** This differs from isSwitchingState in that we take into account how far the transition
843     *  has completed. */
844    public boolean isFinishedSwitchingState() {
845        return !mIsSwitchingState || (mTransitionProgress > 0.5f);
846    }
847
848    protected void onWindowVisibilityChanged (int visibility) {
849        mLauncher.onWindowVisibilityChanged(visibility);
850        if (mCustomContentShowing && mCustomContentCallbacks != null) {
851            if (visibility == View.VISIBLE) {
852                mCustomContentCallbacks.onShow();
853            } else if (visibility == View.GONE) {
854                mCustomContentCallbacks.onHide();
855            }
856        }
857    }
858
859    @Override
860    public boolean dispatchUnhandledMove(View focused, int direction) {
861        if (isSmall() || !isFinishedSwitchingState()) {
862            // when the home screens are shrunken, shouldn't allow side-scrolling
863            return false;
864        }
865        return super.dispatchUnhandledMove(focused, direction);
866    }
867
868    @Override
869    public boolean onInterceptTouchEvent(MotionEvent ev) {
870        switch (ev.getAction() & MotionEvent.ACTION_MASK) {
871        case MotionEvent.ACTION_DOWN:
872            mXDown = ev.getX();
873            mYDown = ev.getY();
874            mTouchDownTime = System.currentTimeMillis();
875            break;
876        case MotionEvent.ACTION_POINTER_UP:
877        case MotionEvent.ACTION_UP:
878            if (mTouchState == TOUCH_STATE_REST) {
879                final CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage);
880                if (!currentPage.lastDownOnOccupiedCell()) {
881                    onWallpaperTap(ev);
882                }
883            }
884        }
885        return super.onInterceptTouchEvent(ev);
886    }
887
888    protected void reinflateWidgetsIfNecessary() {
889        final int clCount = getChildCount();
890        for (int i = 0; i < clCount; i++) {
891            CellLayout cl = (CellLayout) getChildAt(i);
892            ShortcutAndWidgetContainer swc = cl.getShortcutsAndWidgets();
893            final int itemCount = swc.getChildCount();
894            for (int j = 0; j < itemCount; j++) {
895                View v = swc.getChildAt(j);
896
897                if (v.getTag() instanceof LauncherAppWidgetInfo) {
898                    LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) v.getTag();
899                    LauncherAppWidgetHostView lahv = (LauncherAppWidgetHostView) info.hostView;
900                    if (lahv != null && lahv.orientationChangedSincedInflation()) {
901                        mLauncher.removeAppWidget(info);
902                        // Remove the current widget which is inflated with the wrong orientation
903                        cl.removeView(lahv);
904                        mLauncher.bindAppWidget(info);
905                    }
906                }
907            }
908        }
909    }
910
911    @Override
912    protected void determineScrollingStart(MotionEvent ev) {
913        if (!isFinishedSwitchingState()) return;
914
915        float deltaX = ev.getX() - mXDown;
916        float absDeltaX = Math.abs(deltaX);
917        float absDeltaY = Math.abs(ev.getY() - mYDown);
918
919        if (Float.compare(absDeltaX, 0f) == 0) return;
920
921        float slope = absDeltaY / absDeltaX;
922        float theta = (float) Math.atan(slope);
923
924        if (absDeltaX > mTouchSlop || absDeltaY > mTouchSlop) {
925            cancelCurrentPageLongPress();
926        }
927
928        boolean passRightSwipesToCustomContent =
929                (mTouchDownTime - mCustomContentShowTime) > CUSTOM_CONTENT_GESTURE_DELAY;
930
931        if (deltaX > 0 && getScreenIdForPageIndex(getCurrentPage()) == CUSTOM_CONTENT_SCREEN_ID
932                && passRightSwipesToCustomContent) {
933            // Pass swipes to the right to the custom content page.
934            return;
935        }
936
937        if (theta > MAX_SWIPE_ANGLE) {
938            // Above MAX_SWIPE_ANGLE, we don't want to ever start scrolling the workspace
939            return;
940        } else if (theta > START_DAMPING_TOUCH_SLOP_ANGLE) {
941            // Above START_DAMPING_TOUCH_SLOP_ANGLE and below MAX_SWIPE_ANGLE, we want to
942            // increase the touch slop to make it harder to begin scrolling the workspace. This
943            // results in vertically scrolling widgets to more easily. The higher the angle, the
944            // more we increase touch slop.
945            theta -= START_DAMPING_TOUCH_SLOP_ANGLE;
946            float extraRatio = (float)
947                    Math.sqrt((theta / (MAX_SWIPE_ANGLE - START_DAMPING_TOUCH_SLOP_ANGLE)));
948            super.determineScrollingStart(ev, 1 + TOUCH_SLOP_DAMPING_FACTOR * extraRatio);
949        } else {
950            // Below START_DAMPING_TOUCH_SLOP_ANGLE, we don't do anything special
951            super.determineScrollingStart(ev);
952        }
953    }
954
955    protected void onPageBeginMoving() {
956        super.onPageBeginMoving();
957
958        if (isHardwareAccelerated()) {
959            updateChildrenLayersEnabled(false);
960        } else {
961            if (mNextPage != INVALID_PAGE) {
962                // we're snapping to a particular screen
963                enableChildrenCache(mCurrentPage, mNextPage);
964            } else {
965                // this is when user is actively dragging a particular screen, they might
966                // swipe it either left or right (but we won't advance by more than one screen)
967                enableChildrenCache(mCurrentPage - 1, mCurrentPage + 1);
968            }
969        }
970
971        // Only show page outlines as we pan if we are on large screen
972        if (LauncherAppState.getInstance().isScreenLarge()) {
973            showOutlines();
974        }
975
976        // If we are not fading in adjacent screens, we still need to restore the alpha in case the
977        // user scrolls while we are transitioning (should not affect dispatchDraw optimizations)
978        if (!mWorkspaceFadeInAdjacentScreens) {
979            for (int i = 0; i < getChildCount(); ++i) {
980                ((CellLayout) getPageAt(i)).setShortcutAndWidgetAlpha(1f);
981            }
982        }
983    }
984
985    protected void onPageEndMoving() {
986        super.onPageEndMoving();
987
988        if (isHardwareAccelerated()) {
989            updateChildrenLayersEnabled(false);
990        } else {
991            clearChildrenCache();
992        }
993
994
995        if (mDragController.isDragging()) {
996            if (isSmall()) {
997                // If we are in springloaded mode, then force an event to check if the current touch
998                // is under a new page (to scroll to)
999                mDragController.forceTouchMove();
1000            }
1001        } else {
1002            // If we are not mid-dragging, hide the page outlines if we are on a large screen
1003            if (LauncherAppState.getInstance().isScreenLarge()) {
1004                hideOutlines();
1005            }
1006        }
1007
1008        if (mDelayedResizeRunnable != null) {
1009            mDelayedResizeRunnable.run();
1010            mDelayedResizeRunnable = null;
1011        }
1012
1013        if (mDelayedSnapToPageRunnable != null) {
1014            mDelayedSnapToPageRunnable.run();
1015            mDelayedSnapToPageRunnable = null;
1016        }
1017        if (mStripScreensOnPageStopMoving) {
1018            stripEmptyScreens();
1019            mStripScreensOnPageStopMoving = false;
1020        }
1021
1022        if (hasCustomContent() && getNextPage() == 0 && !mCustomContentShowing) {
1023            mCustomContentShowing = true;
1024            if (mCustomContentCallbacks != null) {
1025                mCustomContentCallbacks.onShow();
1026                mCustomContentShowTime = System.currentTimeMillis();
1027            }
1028        } else if (hasCustomContent() && getNextPage() != 0 && mCustomContentShowing) {
1029            mCustomContentShowing = false;
1030            if (mCustomContentCallbacks != null) {
1031                mCustomContentCallbacks.onHide();
1032                mLauncher.resetQSBScroll();
1033            }
1034        }
1035    }
1036
1037    @Override
1038    protected void notifyPageSwitchListener() {
1039        super.notifyPageSwitchListener();
1040        Launcher.setScreen(mCurrentPage);
1041    };
1042
1043    protected void setWallpaperDimension() {
1044        String spKey = WallpaperCropActivity.getSharedPreferencesKey();
1045        SharedPreferences sp = mLauncher.getSharedPreferences(spKey, Context.MODE_PRIVATE);
1046        WallpaperPickerActivity.suggestWallpaperDimension(mLauncher.getResources(),
1047                sp, mLauncher.getWindowManager(), mWallpaperManager);
1048    }
1049
1050    protected void snapToPage(int whichPage, Runnable r) {
1051        if (mDelayedSnapToPageRunnable != null) {
1052            mDelayedSnapToPageRunnable.run();
1053        }
1054        mDelayedSnapToPageRunnable = r;
1055        snapToPage(whichPage, SLOW_PAGE_SNAP_ANIMATION_DURATION);
1056    }
1057
1058    protected void snapToScreenId(long screenId, Runnable r) {
1059        snapToPage(getPageIndexForScreenId(screenId), r);
1060    }
1061
1062    class WallpaperOffsetInterpolator implements Choreographer.FrameCallback {
1063        float mFinalOffset = 0.0f;
1064        float mCurrentOffset = 0.5f; // to force an initial update
1065        //long mLastWallpaperOffsetUpdateTime;
1066        boolean mWaitingForUpdate;
1067        Choreographer mChoreographer;
1068        Interpolator mInterpolator;
1069        boolean mAnimating;
1070        long mAnimationStartTime;
1071        float mAnimationStartOffset;
1072        private final int ANIMATION_DURATION = 250;
1073        // Don't use all the wallpaper for parallax until you have at least this many pages
1074        private final int MIN_PARALLAX_PAGE_SPAN = 4;
1075        int mNumScreens;
1076
1077        public WallpaperOffsetInterpolator() {
1078            mChoreographer = Choreographer.getInstance();
1079            mInterpolator = new DecelerateInterpolator(1.5f);
1080        }
1081
1082        @Override
1083        public void doFrame(long frameTimeNanos) {
1084            updateOffset(false);
1085        }
1086
1087        private void updateOffset(boolean force) {
1088            if (mWaitingForUpdate || force) {
1089                mWaitingForUpdate = false;
1090                if (computeScrollOffset() && mWindowToken != null) {
1091                    try {
1092                        mWallpaperManager.setWallpaperOffsets(mWindowToken,
1093                                mWallpaperOffset.getCurrX(), 0.5f);
1094                        setWallpaperOffsetSteps();
1095                    } catch (IllegalArgumentException e) {
1096                        Log.e(TAG, "Error updating wallpaper offset: " + e);
1097                    }
1098                }
1099            }
1100        }
1101
1102        public boolean computeScrollOffset() {
1103            final float oldOffset = mCurrentOffset;
1104            if (mAnimating) {
1105                long durationSinceAnimation = System.currentTimeMillis() - mAnimationStartTime;
1106                float t0 = durationSinceAnimation / (float) ANIMATION_DURATION;
1107                float t1 = mInterpolator.getInterpolation(t0);
1108                mCurrentOffset = mAnimationStartOffset +
1109                        (mFinalOffset - mAnimationStartOffset) * t1;
1110                mAnimating = durationSinceAnimation < ANIMATION_DURATION;
1111            } else {
1112                mCurrentOffset = mFinalOffset;
1113            }
1114
1115            if (Math.abs(mCurrentOffset - mFinalOffset) > 0.0000001f) {
1116                scheduleUpdate();
1117            }
1118            if (Math.abs(oldOffset - mCurrentOffset) > 0.0000001f) {
1119                return true;
1120            }
1121            return false;
1122        }
1123
1124        private float wallpaperOffsetForCurrentScroll() {
1125            if (getChildCount() <= 1) {
1126                return 0;
1127            }
1128
1129            // Exclude the leftmost page
1130            final int firstIndex = isLayoutRtl() ? getChildCount() - 2 : 1;
1131            // Exclude the last extra empty screen (if we have > MIN_PARALLAX_PAGE_SPAN pages)
1132            int extra = numExtraScreensToIgnore();
1133            final int lastIndex = isLayoutRtl() ? 0 + extra : getChildCount() - 1 - extra;
1134
1135            int firstPageScrollX = getScrollForPage(firstIndex);
1136            int scrollRange = getScrollForPage(lastIndex) - firstPageScrollX;
1137            if (scrollRange == 0) {
1138                return 0;
1139            } else {
1140                // TODO: do different behavior if it's  a live wallpaper?
1141                float offset = Math.min(1, (getScrollX() - firstPageScrollX) / (float) scrollRange);
1142                offset = Math.max(0, offset);
1143                // Don't use up all the wallpaper parallax until you have at least
1144                // MIN_PARALLAX_PAGE_SPAN pages
1145                int numScrollingPages = getNumScreensExcludingExtraEmptyScreenAndLeftmost();
1146                int parallaxPageSpan = Math.max(MIN_PARALLAX_PAGE_SPAN, numScrollingPages) - 1;
1147                return offset * (numScrollingPages - 1) / parallaxPageSpan;
1148            }
1149        }
1150
1151        private int numExtraScreensToIgnore() {
1152            int numScrollingPages = getChildCount() - 1;
1153            if (numScrollingPages > MIN_PARALLAX_PAGE_SPAN && hasExtraEmptyScreen()) {
1154                return 1;
1155            } else {
1156                return 0;
1157            }
1158        }
1159
1160        private int getNumScreensExcludingExtraEmptyScreenAndLeftmost() {
1161            int numScrollingPages = getChildCount() - 1 - numExtraScreensToIgnore();
1162            return numScrollingPages;
1163        }
1164
1165        public void syncWithScroll() {
1166            float offset = wallpaperOffsetForCurrentScroll();
1167            mWallpaperOffset.setFinalX(offset);
1168            updateOffset(true);
1169        }
1170
1171        public float getCurrX() {
1172            return mCurrentOffset;
1173        }
1174
1175        public float getFinalX() {
1176            return mFinalOffset;
1177        }
1178
1179        private void animateToFinal() {
1180            mAnimating = true;
1181            mAnimationStartOffset = mCurrentOffset;
1182            mAnimationStartTime = System.currentTimeMillis();
1183        }
1184
1185        private void setWallpaperOffsetSteps() {
1186            // Set wallpaper offset steps (1 / (number of screens - 1))
1187            mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 1.0f);
1188        }
1189
1190        public void setFinalX(float x) {
1191            scheduleUpdate();
1192            mFinalOffset = Math.max(0f, Math.min(x, 1.0f));
1193            if (getNumScreensExcludingExtraEmptyScreenAndLeftmost() != mNumScreens) {
1194                if (mNumScreens > 0) {
1195                    // Don't animate if we're going from 0 screens
1196                    animateToFinal();
1197                }
1198                mNumScreens = getNumScreensExcludingExtraEmptyScreenAndLeftmost();
1199            }
1200        }
1201
1202        private void scheduleUpdate() {
1203            if (!mWaitingForUpdate) {
1204                mChoreographer.postFrameCallback(this);
1205                mWaitingForUpdate = true;
1206            }
1207        }
1208
1209        public void jumpToFinal() {
1210            mCurrentOffset = mFinalOffset;
1211        }
1212    }
1213
1214    @Override
1215    public void computeScroll() {
1216        super.computeScroll();
1217        mWallpaperOffset.syncWithScroll();
1218    }
1219
1220    void showOutlines() {
1221        if (!isSmall() && !mIsSwitchingState) {
1222            if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel();
1223            if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel();
1224            mChildrenOutlineFadeInAnimation = LauncherAnimUtils.ofFloat(this, "childrenOutlineAlpha", 1.0f);
1225            mChildrenOutlineFadeInAnimation.setDuration(CHILDREN_OUTLINE_FADE_IN_DURATION);
1226            mChildrenOutlineFadeInAnimation.start();
1227        }
1228    }
1229
1230    void hideOutlines() {
1231        if (!isSmall() && !mIsSwitchingState) {
1232            if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel();
1233            if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel();
1234            mChildrenOutlineFadeOutAnimation = LauncherAnimUtils.ofFloat(this, "childrenOutlineAlpha", 0.0f);
1235            mChildrenOutlineFadeOutAnimation.setDuration(CHILDREN_OUTLINE_FADE_OUT_DURATION);
1236            mChildrenOutlineFadeOutAnimation.setStartDelay(CHILDREN_OUTLINE_FADE_OUT_DELAY);
1237            mChildrenOutlineFadeOutAnimation.start();
1238        }
1239    }
1240
1241    public void showOutlinesTemporarily() {
1242        if (!mIsPageMoving && !isTouchActive()) {
1243            snapToPage(mCurrentPage);
1244        }
1245    }
1246
1247    public void setChildrenOutlineAlpha(float alpha) {
1248        mChildrenOutlineAlpha = alpha;
1249        for (int i = 0; i < getChildCount(); i++) {
1250            CellLayout cl = (CellLayout) getChildAt(i);
1251            cl.setBackgroundAlpha(alpha);
1252        }
1253    }
1254
1255    public float getChildrenOutlineAlpha() {
1256        return mChildrenOutlineAlpha;
1257    }
1258
1259    void disableBackground() {
1260        mDrawBackground = false;
1261    }
1262    void enableBackground() {
1263        mDrawBackground = true;
1264    }
1265
1266    private void animateBackgroundGradient(float finalAlpha, boolean animated) {
1267        if (mBackground == null) return;
1268        if (mBackgroundFadeInAnimation != null) {
1269            mBackgroundFadeInAnimation.cancel();
1270            mBackgroundFadeInAnimation = null;
1271        }
1272        if (mBackgroundFadeOutAnimation != null) {
1273            mBackgroundFadeOutAnimation.cancel();
1274            mBackgroundFadeOutAnimation = null;
1275        }
1276        float startAlpha = getBackgroundAlpha();
1277        if (finalAlpha != startAlpha) {
1278            if (animated) {
1279                mBackgroundFadeOutAnimation =
1280                        LauncherAnimUtils.ofFloat(this, startAlpha, finalAlpha);
1281                mBackgroundFadeOutAnimation.addUpdateListener(new AnimatorUpdateListener() {
1282                    public void onAnimationUpdate(ValueAnimator animation) {
1283                        setBackgroundAlpha(((Float) animation.getAnimatedValue()).floatValue());
1284                    }
1285                });
1286                mBackgroundFadeOutAnimation.setInterpolator(new DecelerateInterpolator(1.5f));
1287                mBackgroundFadeOutAnimation.setDuration(BACKGROUND_FADE_OUT_DURATION);
1288                mBackgroundFadeOutAnimation.start();
1289            } else {
1290                setBackgroundAlpha(finalAlpha);
1291            }
1292        }
1293    }
1294
1295    public void setBackgroundAlpha(float alpha) {
1296        if (alpha != mBackgroundAlpha) {
1297            mBackgroundAlpha = alpha;
1298            invalidate();
1299        }
1300    }
1301
1302    public float getBackgroundAlpha() {
1303        return mBackgroundAlpha;
1304    }
1305
1306    float backgroundAlphaInterpolator(float r) {
1307        float pivotA = 0.1f;
1308        float pivotB = 0.4f;
1309        if (r < pivotA) {
1310            return 0;
1311        } else if (r > pivotB) {
1312            return 1.0f;
1313        } else {
1314            return (r - pivotA)/(pivotB - pivotA);
1315        }
1316    }
1317
1318    private void updatePageAlphaValues(int screenCenter) {
1319        boolean isInOverscroll = mOverScrollX < 0 || mOverScrollX > mMaxScrollX;
1320        if (mWorkspaceFadeInAdjacentScreens &&
1321                mState == State.NORMAL &&
1322                !mIsSwitchingState &&
1323                !isInOverscroll) {
1324            for (int i = 0; i < getChildCount(); i++) {
1325                CellLayout child = (CellLayout) getChildAt(i);
1326                if (child != null) {
1327                    float scrollProgress = getScrollProgress(screenCenter, child, i);
1328                    float alpha = 1 - Math.abs(scrollProgress);
1329                    child.getShortcutsAndWidgets().setAlpha(alpha);
1330                    if (!mIsDragOccuring) {
1331                        child.setBackgroundAlphaMultiplier(
1332                                backgroundAlphaInterpolator(Math.abs(scrollProgress)));
1333                    } else {
1334                        child.setBackgroundAlphaMultiplier(1f);
1335                    }
1336                }
1337            }
1338        }
1339    }
1340
1341    private void setChildrenBackgroundAlphaMultipliers(float a) {
1342        for (int i = 0; i < getChildCount(); i++) {
1343            CellLayout child = (CellLayout) getChildAt(i);
1344            child.setBackgroundAlphaMultiplier(a);
1345        }
1346    }
1347
1348    public boolean hasCustomContent() {
1349        return (mScreenOrder.size() > 0 && mScreenOrder.get(0) == CUSTOM_CONTENT_SCREEN_ID);
1350    }
1351
1352    public boolean isOnOrMovingToCustomContent() {
1353        return hasCustomContent() && getNextPage() == 0;
1354    }
1355
1356    private void updateStateForCustomContent(int screenCenter) {
1357        float translationX = 0;
1358        float progress = 0;
1359        if (hasCustomContent()) {
1360            int index = mScreenOrder.indexOf(CUSTOM_CONTENT_SCREEN_ID);
1361            int scrollDelta = getScrollForPage(index + 1) - getScrollX();
1362            translationX = Math.max(scrollDelta, 0);
1363            progress = (1.0f * scrollDelta) /
1364                    (getScrollForPage(index + 1) - getScrollForPage(index));
1365            progress = Math.max(0, progress);
1366        }
1367
1368        if (Float.compare(progress, mLastCustomContentScrollProgress) == 0) return;
1369        mLastCustomContentScrollProgress = progress;
1370
1371        setBackgroundAlpha(progress * 0.8f);
1372
1373        if (mLauncher.getHotseat() != null) {
1374            mLauncher.getHotseat().setTranslationX(translationX);
1375        }
1376
1377        if (getPageIndicator() != null) {
1378            getPageIndicator().setTranslationX(translationX);
1379        }
1380
1381        if (mCustomContentCallbacks != null) {
1382            mCustomContentCallbacks.onScrollProgressChanged(progress);
1383        }
1384    }
1385
1386    @Override
1387    protected void screenScrolled(int screenCenter) {
1388        final boolean isRtl = isLayoutRtl();
1389        super.screenScrolled(screenCenter);
1390
1391        updatePageAlphaValues(screenCenter);
1392        updateStateForCustomContent(screenCenter);
1393        enableHwLayersOnVisiblePages();
1394
1395        if ((mOverScrollX < 0 && !hasCustomContent()) || mOverScrollX > mMaxScrollX) {
1396            int index = 0;
1397            float pivotX = 0f;
1398            final float leftBiasedPivot = 0.25f;
1399            final float rightBiasedPivot = 0.75f;
1400            final int lowerIndex = 0;
1401            final int upperIndex = getChildCount() - 1;
1402            if (isRtl) {
1403                index = mOverScrollX < 0 ? upperIndex : lowerIndex;
1404                pivotX = (index == 0 ? leftBiasedPivot : rightBiasedPivot);
1405            } else {
1406                index = mOverScrollX < 0 ? lowerIndex : upperIndex;
1407                pivotX = (index == 0 ? rightBiasedPivot : leftBiasedPivot);
1408            }
1409
1410            CellLayout cl = (CellLayout) getChildAt(index);
1411            float scrollProgress = getScrollProgress(screenCenter, cl, index);
1412            final boolean isLeftPage = (isRtl ? index > 0 : index == 0);
1413            cl.setOverScrollAmount(Math.abs(scrollProgress), isLeftPage);
1414            float rotation = -WORKSPACE_OVERSCROLL_ROTATION * scrollProgress;
1415            cl.setRotationY(rotation);
1416            if (!mOverscrollTransformsSet) {
1417                mOverscrollTransformsSet = true;
1418                cl.setCameraDistance(mDensity * mCameraDistance);
1419                cl.setPivotX(cl.getMeasuredWidth() * pivotX);
1420                cl.setPivotY(cl.getMeasuredHeight() * 0.5f);
1421                cl.setOverscrollTransformsDirty(true);
1422            }
1423        } else {
1424            if (mOverscrollTransformsSet) {
1425                mOverscrollTransformsSet = false;
1426                ((CellLayout) getChildAt(0)).resetOverscrollTransforms();
1427                ((CellLayout) getChildAt(getChildCount() - 1)).resetOverscrollTransforms();
1428            }
1429        }
1430    }
1431
1432    @Override
1433    protected void overScroll(float amount) {
1434        acceleratedOverScroll(amount);
1435    }
1436
1437    protected void onAttachedToWindow() {
1438        super.onAttachedToWindow();
1439        mWindowToken = getWindowToken();
1440        computeScroll();
1441        mDragController.setWindowToken(mWindowToken);
1442    }
1443
1444    protected void onDetachedFromWindow() {
1445        super.onDetachedFromWindow();
1446        mWindowToken = null;
1447    }
1448
1449    @Override
1450    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
1451        if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) {
1452            mWallpaperOffset.syncWithScroll();
1453            mWallpaperOffset.jumpToFinal();
1454        }
1455        super.onLayout(changed, left, top, right, bottom);
1456    }
1457
1458    @Override
1459    protected void onDraw(Canvas canvas) {
1460        // Draw the background gradient if necessary
1461        if (mBackground != null && mBackgroundAlpha > 0.0f && mDrawBackground) {
1462            int alpha = (int) (mBackgroundAlpha * 255);
1463            mBackground.setAlpha(alpha);
1464            mBackground.setBounds(getScrollX(), 0, getScrollX() + getMeasuredWidth(),
1465                    getMeasuredHeight());
1466            mBackground.draw(canvas);
1467        }
1468
1469        super.onDraw(canvas);
1470
1471        // Call back to LauncherModel to finish binding after the first draw
1472        post(mBindPages);
1473    }
1474
1475    boolean isDrawingBackgroundGradient() {
1476        return (mBackground != null && mBackgroundAlpha > 0.0f && mDrawBackground);
1477    }
1478
1479    @Override
1480    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
1481        if (!mLauncher.isAllAppsVisible()) {
1482            final Folder openFolder = getOpenFolder();
1483            if (openFolder != null) {
1484                return openFolder.requestFocus(direction, previouslyFocusedRect);
1485            } else {
1486                return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
1487            }
1488        }
1489        return false;
1490    }
1491
1492    @Override
1493    public int getDescendantFocusability() {
1494        if (isSmall()) {
1495            return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
1496        }
1497        return super.getDescendantFocusability();
1498    }
1499
1500    @Override
1501    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
1502        if (!mLauncher.isAllAppsVisible()) {
1503            final Folder openFolder = getOpenFolder();
1504            if (openFolder != null) {
1505                openFolder.addFocusables(views, direction);
1506            } else {
1507                super.addFocusables(views, direction, focusableMode);
1508            }
1509        }
1510    }
1511
1512    public boolean isSmall() {
1513        return mState == State.SMALL || mState == State.SPRING_LOADED || mState == State.OVERVIEW;
1514    }
1515
1516    void enableChildrenCache(int fromPage, int toPage) {
1517        if (fromPage > toPage) {
1518            final int temp = fromPage;
1519            fromPage = toPage;
1520            toPage = temp;
1521        }
1522
1523        final int screenCount = getChildCount();
1524
1525        fromPage = Math.max(fromPage, 0);
1526        toPage = Math.min(toPage, screenCount - 1);
1527
1528        for (int i = fromPage; i <= toPage; i++) {
1529            final CellLayout layout = (CellLayout) getChildAt(i);
1530            layout.setChildrenDrawnWithCacheEnabled(true);
1531            layout.setChildrenDrawingCacheEnabled(true);
1532        }
1533    }
1534
1535    void clearChildrenCache() {
1536        final int screenCount = getChildCount();
1537        for (int i = 0; i < screenCount; i++) {
1538            final CellLayout layout = (CellLayout) getChildAt(i);
1539            layout.setChildrenDrawnWithCacheEnabled(false);
1540            // In software mode, we don't want the items to continue to be drawn into bitmaps
1541            if (!isHardwareAccelerated()) {
1542                layout.setChildrenDrawingCacheEnabled(false);
1543            }
1544        }
1545    }
1546
1547    private void updateChildrenLayersEnabled(boolean force) {
1548        boolean small = mState == State.SMALL || mState == State.OVERVIEW || mIsSwitchingState;
1549        boolean enableChildrenLayers = force || small || mAnimatingViewIntoPlace || isPageMoving();
1550
1551        if (enableChildrenLayers != mChildrenLayersEnabled) {
1552            mChildrenLayersEnabled = enableChildrenLayers;
1553            if (mChildrenLayersEnabled) {
1554                enableHwLayersOnVisiblePages();
1555            } else {
1556                for (int i = 0; i < getPageCount(); i++) {
1557                    final CellLayout cl = (CellLayout) getChildAt(i);
1558                    cl.disableHardwareLayers();
1559                }
1560            }
1561        }
1562    }
1563
1564    private void enableHwLayersOnVisiblePages() {
1565        if (mChildrenLayersEnabled) {
1566            final int screenCount = getChildCount();
1567            getVisiblePages(mTempVisiblePagesRange);
1568            int leftScreen = mTempVisiblePagesRange[0];
1569            int rightScreen = mTempVisiblePagesRange[1];
1570            if (leftScreen == rightScreen) {
1571                // make sure we're caching at least two pages always
1572                if (rightScreen < screenCount - 1) {
1573                    rightScreen++;
1574                } else if (leftScreen > 0) {
1575                    leftScreen--;
1576                }
1577            }
1578            for (int i = 0; i < screenCount; i++) {
1579                final CellLayout layout = (CellLayout) getPageAt(i);
1580                if (!(leftScreen <= i && i <= rightScreen && shouldDrawChild(layout))) {
1581                    layout.disableHardwareLayers();
1582                }
1583            }
1584            for (int i = 0; i < screenCount; i++) {
1585                final CellLayout layout = (CellLayout) getPageAt(i);
1586                if (leftScreen <= i && i <= rightScreen && shouldDrawChild(layout)) {
1587                    layout.enableHardwareLayers();
1588                }
1589            }
1590        }
1591    }
1592
1593    public void buildPageHardwareLayers() {
1594        // force layers to be enabled just for the call to buildLayer
1595        updateChildrenLayersEnabled(true);
1596        if (getWindowToken() != null) {
1597            final int childCount = getChildCount();
1598            for (int i = 0; i < childCount; i++) {
1599                CellLayout cl = (CellLayout) getChildAt(i);
1600                cl.buildHardwareLayer();
1601            }
1602        }
1603        updateChildrenLayersEnabled(false);
1604    }
1605
1606    protected void onWallpaperTap(MotionEvent ev) {
1607        final int[] position = mTempCell;
1608        getLocationOnScreen(position);
1609
1610        int pointerIndex = ev.getActionIndex();
1611        position[0] += (int) ev.getX(pointerIndex);
1612        position[1] += (int) ev.getY(pointerIndex);
1613
1614        mWallpaperManager.sendWallpaperCommand(getWindowToken(),
1615                ev.getAction() == MotionEvent.ACTION_UP
1616                        ? WallpaperManager.COMMAND_TAP : WallpaperManager.COMMAND_SECONDARY_TAP,
1617                position[0], position[1], 0, null);
1618    }
1619
1620    /*
1621     * This interpolator emulates the rate at which the perceived scale of an object changes
1622     * as its distance from a camera increases. When this interpolator is applied to a scale
1623     * animation on a view, it evokes the sense that the object is shrinking due to moving away
1624     * from the camera.
1625     */
1626    static class ZInterpolator implements TimeInterpolator {
1627        private float focalLength;
1628
1629        public ZInterpolator(float foc) {
1630            focalLength = foc;
1631        }
1632
1633        public float getInterpolation(float input) {
1634            return (1.0f - focalLength / (focalLength + input)) /
1635                (1.0f - focalLength / (focalLength + 1.0f));
1636        }
1637    }
1638
1639    /*
1640     * The exact reverse of ZInterpolator.
1641     */
1642    static class InverseZInterpolator implements TimeInterpolator {
1643        private ZInterpolator zInterpolator;
1644        public InverseZInterpolator(float foc) {
1645            zInterpolator = new ZInterpolator(foc);
1646        }
1647        public float getInterpolation(float input) {
1648            return 1 - zInterpolator.getInterpolation(1 - input);
1649        }
1650    }
1651
1652    /*
1653     * ZInterpolator compounded with an ease-out.
1654     */
1655    static class ZoomOutInterpolator implements TimeInterpolator {
1656        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(0.75f);
1657        private final ZInterpolator zInterpolator = new ZInterpolator(0.13f);
1658
1659        public float getInterpolation(float input) {
1660            return decelerate.getInterpolation(zInterpolator.getInterpolation(input));
1661        }
1662    }
1663
1664    /*
1665     * InvereZInterpolator compounded with an ease-out.
1666     */
1667    static class ZoomInInterpolator implements TimeInterpolator {
1668        private final InverseZInterpolator inverseZInterpolator = new InverseZInterpolator(0.35f);
1669        private final DecelerateInterpolator decelerate = new DecelerateInterpolator(3.0f);
1670
1671        public float getInterpolation(float input) {
1672            return decelerate.getInterpolation(inverseZInterpolator.getInterpolation(input));
1673        }
1674    }
1675
1676    private final ZoomInInterpolator mZoomInInterpolator = new ZoomInInterpolator();
1677
1678    /*
1679    *
1680    * We call these methods (onDragStartedWithItemSpans/onDragStartedWithSize) whenever we
1681    * start a drag in Launcher, regardless of whether the drag has ever entered the Workspace
1682    *
1683    * These methods mark the appropriate pages as accepting drops (which alters their visual
1684    * appearance).
1685    *
1686    */
1687    public void onDragStartedWithItem(View v) {
1688        final Canvas canvas = new Canvas();
1689
1690        // The outline is used to visualize where the item will land if dropped
1691        mDragOutline = createDragOutline(v, canvas, DRAG_BITMAP_PADDING);
1692    }
1693
1694    public void onDragStartedWithItem(PendingAddItemInfo info, Bitmap b, boolean clipAlpha) {
1695        final Canvas canvas = new Canvas();
1696
1697        int[] size = estimateItemSize(info.spanX, info.spanY, info, false);
1698
1699        // The outline is used to visualize where the item will land if dropped
1700        mDragOutline = createDragOutline(b, canvas, DRAG_BITMAP_PADDING, size[0],
1701                size[1], clipAlpha);
1702    }
1703
1704    public void exitWidgetResizeMode() {
1705        DragLayer dragLayer = mLauncher.getDragLayer();
1706        dragLayer.clearAllResizeFrames();
1707    }
1708
1709    private void initAnimationArrays() {
1710        final int childCount = getChildCount();
1711        if (mLastChildCount == childCount) return;
1712
1713        mOldBackgroundAlphas = new float[childCount];
1714        mOldAlphas = new float[childCount];
1715        mNewBackgroundAlphas = new float[childCount];
1716        mNewAlphas = new float[childCount];
1717    }
1718
1719    Animator getChangeStateAnimation(final State state, boolean animated) {
1720        return getChangeStateAnimation(state, animated, 0, -1);
1721    }
1722
1723    @Override
1724    protected void getOverviewModePages(int[] range) {
1725        int count = mScreenOrder.size();
1726
1727        int start = hasCustomContent() ? 1 : 0;
1728        int end = getChildCount() - 1;
1729
1730        range[0] = Math.max(0, Math.min(start, getChildCount() - 1));
1731        range[1] = Math.max(0,  end);
1732     }
1733
1734    protected void onStartReordering() {
1735        super.onStartReordering();
1736        int count = getChildCount();
1737        for (int i = 0; i < count; i++) {
1738            ((CellLayout) getChildAt(i)).setUseActiveGlowBackground(true);
1739        }
1740        showOutlines();
1741
1742        // Reordering handles its own animations, disable the automatic ones.
1743        setLayoutTransition(null);
1744    }
1745
1746    protected void onEndReordering() {
1747        super.onEndReordering();
1748        int count = getChildCount();
1749        for (int i = 0; i < count; i++) {
1750            ((CellLayout) getChildAt(i)).setUseActiveGlowBackground(false);
1751        }
1752        hideOutlines();
1753
1754        mScreenOrder.clear();
1755        for (int i = 0; i < count; i++) {
1756            CellLayout cl = ((CellLayout) getChildAt(i));
1757            mScreenOrder.add(getIdForScreen(cl));
1758        }
1759
1760        mLauncher.getModel().updateWorkspaceScreenOrder(mLauncher, mScreenOrder);
1761
1762        // Re-enable auto layout transitions for page deletion.
1763        setLayoutTransition(mLayoutTransition);
1764    }
1765
1766    public boolean isInOverviewMode() {
1767        return mState == State.OVERVIEW;
1768    }
1769
1770    public void enterOverviewMode() {
1771        mLauncher.onInteractionBegin();
1772        enableOverviewMode(true, -1, true);
1773    }
1774
1775    public void exitOverviewMode(boolean animated) {
1776        exitOverviewMode(-1, animated);
1777        mLauncher.onInteractionEnd();
1778    }
1779
1780    public void exitOverviewMode(int snapPage, boolean animated) {
1781        enableOverviewMode(false, snapPage, animated);
1782        mLauncher.onInteractionEnd();
1783    }
1784
1785    private void enableOverviewMode(boolean enable, int snapPage, boolean animated) {
1786        State finalState = Workspace.State.OVERVIEW;
1787        if (!enable) {
1788            finalState = Workspace.State.NORMAL;
1789        }
1790
1791        Animator workspaceAnim = getChangeStateAnimation(finalState, animated, 0, snapPage);
1792        if (workspaceAnim != null) {
1793            onTransitionPrepare();
1794            workspaceAnim.addListener(new AnimatorListenerAdapter() {
1795                @Override
1796                public void onAnimationEnd(Animator arg0) {
1797                    onTransitionEnd();
1798                }
1799            });
1800            workspaceAnim.start();
1801        }
1802    }
1803
1804    Animator getChangeStateAnimation(final State state, boolean animated, int delay, int snapPage) {
1805        if (mState == state) {
1806            return null;
1807        }
1808
1809        // Initialize animation arrays for the first time if necessary
1810        initAnimationArrays();
1811
1812        AnimatorSet anim = animated ? LauncherAnimUtils.createAnimatorSet() : null;
1813
1814        final State oldState = mState;
1815        final boolean oldStateIsNormal = (oldState == State.NORMAL);
1816        final boolean oldStateIsSpringLoaded = (oldState == State.SPRING_LOADED);
1817        final boolean oldStateIsSmall = (oldState == State.SMALL);
1818        final boolean oldStateIsOverview = (oldState == State.OVERVIEW);
1819        mState = state;
1820        final boolean stateIsNormal = (state == State.NORMAL);
1821        final boolean stateIsSpringLoaded = (state == State.SPRING_LOADED);
1822        final boolean stateIsSmall = (state == State.SMALL);
1823        final boolean stateIsOverview = (state == State.OVERVIEW);
1824        float finalBackgroundAlpha = stateIsSpringLoaded ? 1.0f : 0f;
1825        float finalHotseatAndPageIndicatorAlpha = (stateIsOverview || stateIsSmall) ? 0f : 1f;
1826        float finalOverviewPanelAlpha = stateIsOverview ? 1f : 0f;
1827        float finalSearchBarAlpha = stateIsOverview ? 0f : 1f;
1828
1829        boolean zoomIn = true;
1830        mNewScale = 1.0f;
1831
1832        if (oldStateIsOverview) {
1833            disableFreeScroll(snapPage);
1834        } else if (stateIsOverview) {
1835            enableFreeScroll();
1836        }
1837
1838        if (state != State.NORMAL) {
1839            if (stateIsSpringLoaded) {
1840                mNewScale = mSpringLoadedShrinkFactor;
1841            } else if (stateIsOverview) {
1842                mNewScale = mOverviewModeShrinkFactor;
1843            } else if (stateIsSmall){
1844                mNewScale = mOverviewModeShrinkFactor - 0.1f;
1845            }
1846            if (oldStateIsNormal && stateIsSmall) {
1847                zoomIn = false;
1848                updateChildrenLayersEnabled(false);
1849            } else {
1850                finalBackgroundAlpha = 1.0f;
1851            }
1852        }
1853        final int duration = zoomIn ?
1854                getResources().getInteger(R.integer.config_workspaceUnshrinkTime) :
1855                getResources().getInteger(R.integer.config_appsCustomizeWorkspaceShrinkTime);
1856        for (int i = 0; i < getChildCount(); i++) {
1857            final CellLayout cl = (CellLayout) getChildAt(i);
1858            float finalAlpha = (!mWorkspaceFadeInAdjacentScreens || stateIsSpringLoaded ||
1859                    (i == mCurrentPage)) ? 1f : 0f;
1860            float currentAlpha = cl.getShortcutsAndWidgets().getAlpha();
1861            float initialAlpha = currentAlpha;
1862
1863            // Determine the pages alpha during the state transition
1864            if ((oldStateIsSmall && stateIsNormal) ||
1865                (oldStateIsNormal && stateIsSmall)) {
1866                // To/from workspace - only show the current page unless the transition is not
1867                //                     animated and the animation end callback below doesn't run;
1868                //                     or, if we're in spring-loaded mode
1869                if (i == mCurrentPage || !animated || oldStateIsSpringLoaded) {
1870                    finalAlpha = 1f;
1871                } else {
1872                    initialAlpha = 0f;
1873                    finalAlpha = 0f;
1874                }
1875            }
1876
1877            mOldAlphas[i] = initialAlpha;
1878            mNewAlphas[i] = finalAlpha;
1879            if (animated) {
1880                mOldBackgroundAlphas[i] = cl.getBackgroundAlpha();
1881                mNewBackgroundAlphas[i] = finalBackgroundAlpha;
1882            } else {
1883                setScaleX(mNewScale);
1884                setScaleY(mNewScale);
1885                cl.setBackgroundAlpha(finalBackgroundAlpha);
1886                cl.setShortcutAndWidgetAlpha(finalAlpha);
1887            }
1888        }
1889
1890        View searchBar = mLauncher.getQsbBar();
1891        if (animated) {
1892            LauncherViewPropertyAnimator scale = new LauncherViewPropertyAnimator(this);
1893            scale.scaleX(mNewScale)
1894                .scaleY(mNewScale)
1895                .setInterpolator(mZoomInInterpolator);
1896            anim.play(scale);
1897            for (int index = 0; index < getChildCount(); index++) {
1898                final int i = index;
1899                final CellLayout cl = (CellLayout) getChildAt(i);
1900                float currentAlpha = cl.getShortcutsAndWidgets().getAlpha();
1901                if (mOldAlphas[i] == 0 && mNewAlphas[i] == 0) {
1902                    cl.setBackgroundAlpha(mNewBackgroundAlphas[i]);
1903                    cl.setShortcutAndWidgetAlpha(mNewAlphas[i]);
1904                } else {
1905
1906                    if (mOldAlphas[i] != mNewAlphas[i] || currentAlpha != mNewAlphas[i]) {
1907                        LauncherViewPropertyAnimator alphaAnim =
1908                            new LauncherViewPropertyAnimator(cl.getShortcutsAndWidgets());
1909                        alphaAnim.alpha(mNewAlphas[i])
1910                            .setDuration(duration)
1911                            .setInterpolator(mZoomInInterpolator);
1912                        anim.play(alphaAnim);
1913                    }
1914                    if (mOldBackgroundAlphas[i] != 0 ||
1915                        mNewBackgroundAlphas[i] != 0) {
1916                        ValueAnimator bgAnim =
1917                                LauncherAnimUtils.ofFloat(cl, 0f, 1f).setDuration(duration);
1918                        bgAnim.setInterpolator(mZoomInInterpolator);
1919                        bgAnim.addUpdateListener(new LauncherAnimatorUpdateListener() {
1920                                public void onAnimationUpdate(float a, float b) {
1921                                    cl.setBackgroundAlpha(
1922                                            a * mOldBackgroundAlphas[i] +
1923                                            b * mNewBackgroundAlphas[i]);
1924                                }
1925                            });
1926                        anim.play(bgAnim);
1927                    }
1928                }
1929            }
1930            ObjectAnimator pageIndicatorAlpha = null;
1931            if (getPageIndicator() != null) {
1932                pageIndicatorAlpha = ObjectAnimator.ofFloat(getPageIndicator(), "alpha",
1933                        finalHotseatAndPageIndicatorAlpha);
1934            }
1935            ObjectAnimator hotseatAlpha = ObjectAnimator.ofFloat(mLauncher.getHotseat(), "alpha",
1936                    finalHotseatAndPageIndicatorAlpha);
1937            ObjectAnimator searchBarAlpha = ObjectAnimator.ofFloat(searchBar,
1938                    "alpha", finalSearchBarAlpha);
1939            ObjectAnimator overviewPanelAlpha = ObjectAnimator.ofFloat(mLauncher.getOverviewPanel(),
1940                    "alpha", finalOverviewPanelAlpha);
1941            overviewPanelAlpha.addUpdateListener(new AlphaUpdateListener(
1942                    mLauncher.getOverviewPanel()));
1943            hotseatAlpha.addUpdateListener(new AlphaUpdateListener(mLauncher.getHotseat()));
1944            searchBarAlpha.addUpdateListener(new AlphaUpdateListener(searchBar));
1945            if (getPageIndicator() != null) {
1946                pageIndicatorAlpha.addUpdateListener(new AlphaUpdateListener(getPageIndicator()));
1947            }
1948            anim.play(overviewPanelAlpha);
1949            anim.play(hotseatAlpha);
1950            anim.play(searchBarAlpha);
1951            anim.play(pageIndicatorAlpha);
1952            anim.setStartDelay(delay);
1953        } else {
1954            mLauncher.getOverviewPanel().setAlpha(finalOverviewPanelAlpha);
1955            AlphaUpdateListener.updateVisibility(mLauncher.getOverviewPanel());
1956            mLauncher.getHotseat().setAlpha(finalHotseatAndPageIndicatorAlpha);
1957            AlphaUpdateListener.updateVisibility(mLauncher.getHotseat());
1958            if (getPageIndicator() != null) {
1959                getPageIndicator().setAlpha(finalHotseatAndPageIndicatorAlpha);
1960                AlphaUpdateListener.updateVisibility(getPageIndicator());
1961            }
1962            searchBar.setAlpha(finalSearchBarAlpha);
1963            AlphaUpdateListener.updateVisibility(searchBar);
1964            updateCustomContentVisibility();
1965        }
1966        if (finalSearchBarAlpha == 0) {
1967            mLauncher.setVoiceButtonProxyVisible(false);
1968        } else {
1969            mLauncher.setVoiceButtonProxyVisible(true);
1970        }
1971
1972        if (stateIsSpringLoaded) {
1973            // Right now we're covered by Apps Customize
1974            // Show the background gradient immediately, so the gradient will
1975            // be showing once AppsCustomize disappears
1976            animateBackgroundGradient(getResources().getInteger(
1977                    R.integer.config_appsCustomizeSpringLoadedBgAlpha) / 100f, false);
1978        } else if (stateIsOverview) {
1979            animateBackgroundGradient(getResources().getInteger(
1980                    R.integer.config_appsCustomizeSpringLoadedBgAlpha) / 100f, true);
1981        } else {
1982            // Fade the background gradient away
1983            animateBackgroundGradient(0f, true);
1984        }
1985        return anim;
1986    }
1987
1988    static class AlphaUpdateListener implements AnimatorUpdateListener {
1989        View view;
1990        public AlphaUpdateListener(View v) {
1991            view = v;
1992        }
1993
1994        @Override
1995        public void onAnimationUpdate(ValueAnimator arg0) {
1996            updateVisibility(view);
1997        }
1998
1999        public static void updateVisibility(View view) {
2000            if (view.getAlpha() < ALPHA_CUTOFF_THRESHOLD && view.getVisibility() != INVISIBLE) {
2001                view.setVisibility(INVISIBLE);
2002            } else if (view.getAlpha() > ALPHA_CUTOFF_THRESHOLD
2003                    && view.getVisibility() != VISIBLE) {
2004                view.setVisibility(VISIBLE);
2005            }
2006        }
2007    }
2008
2009    @Override
2010    public void onLauncherTransitionPrepare(Launcher l, boolean animated, boolean toWorkspace) {
2011        onTransitionPrepare();
2012    }
2013
2014    @Override
2015    public void onLauncherTransitionStart(Launcher l, boolean animated, boolean toWorkspace) {
2016    }
2017
2018    @Override
2019    public void onLauncherTransitionStep(Launcher l, float t) {
2020        mTransitionProgress = t;
2021    }
2022
2023    @Override
2024    public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
2025        onTransitionEnd();
2026    }
2027
2028    private void onTransitionPrepare() {
2029        mIsSwitchingState = true;
2030        updateChildrenLayersEnabled(false);
2031        hideCustomContentIfNecessary();
2032    }
2033
2034    void updateCustomContentVisibility() {
2035        int visibility = mState == Workspace.State.NORMAL ? VISIBLE : INVISIBLE;
2036        if (hasCustomContent()) {
2037            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(visibility);
2038        }
2039    }
2040
2041    void showCustomContentIfNecessary() {
2042        boolean show  = mState == Workspace.State.NORMAL;
2043        if (show && hasCustomContent()) {
2044            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(VISIBLE);
2045        }
2046    }
2047
2048    void hideCustomContentIfNecessary() {
2049        boolean hide  = mState != Workspace.State.NORMAL;
2050        if (hide && hasCustomContent()) {
2051            mWorkspaceScreens.get(CUSTOM_CONTENT_SCREEN_ID).setVisibility(INVISIBLE);
2052        }
2053    }
2054
2055    private void onTransitionEnd() {
2056        mIsSwitchingState = false;
2057        updateChildrenLayersEnabled(false);
2058        // The code in getChangeStateAnimation to determine initialAlpha and finalAlpha will ensure
2059        // ensure that only the current page is visible during (and subsequently, after) the
2060        // transition animation.  If fade adjacent pages is disabled, then re-enable the page
2061        // visibility after the transition animation.
2062        if (!mWorkspaceFadeInAdjacentScreens) {
2063            for (int i = 0; i < getChildCount(); i++) {
2064                final CellLayout cl = (CellLayout) getChildAt(i);
2065                cl.setShortcutAndWidgetAlpha(1f);
2066            }
2067        }
2068        showCustomContentIfNecessary();
2069    }
2070
2071    @Override
2072    public View getContent() {
2073        return this;
2074    }
2075
2076    /**
2077     * Draw the View v into the given Canvas.
2078     *
2079     * @param v the view to draw
2080     * @param destCanvas the canvas to draw on
2081     * @param padding the horizontal and vertical padding to use when drawing
2082     */
2083    private void drawDragView(View v, Canvas destCanvas, int padding, boolean pruneToDrawable) {
2084        final Rect clipRect = mTempRect;
2085        v.getDrawingRect(clipRect);
2086
2087        boolean textVisible = false;
2088
2089        destCanvas.save();
2090        if (v instanceof TextView && pruneToDrawable) {
2091            Drawable d = ((TextView) v).getCompoundDrawables()[1];
2092            clipRect.set(0, 0, d.getIntrinsicWidth() + padding, d.getIntrinsicHeight() + padding);
2093            destCanvas.translate(padding / 2, padding / 2);
2094            d.draw(destCanvas);
2095        } else {
2096            if (v instanceof FolderIcon) {
2097                // For FolderIcons the text can bleed into the icon area, and so we need to
2098                // hide the text completely (which can't be achieved by clipping).
2099                if (((FolderIcon) v).getTextVisible()) {
2100                    ((FolderIcon) v).setTextVisible(false);
2101                    textVisible = true;
2102                }
2103            } else if (v instanceof BubbleTextView) {
2104                final BubbleTextView tv = (BubbleTextView) v;
2105                clipRect.bottom = tv.getExtendedPaddingTop() - (int) BubbleTextView.PADDING_V +
2106                        tv.getLayout().getLineTop(0);
2107            } else if (v instanceof TextView) {
2108                final TextView tv = (TextView) v;
2109                clipRect.bottom = tv.getExtendedPaddingTop() - tv.getCompoundDrawablePadding() +
2110                        tv.getLayout().getLineTop(0);
2111            }
2112            destCanvas.translate(-v.getScrollX() + padding / 2, -v.getScrollY() + padding / 2);
2113            destCanvas.clipRect(clipRect, Op.REPLACE);
2114            v.draw(destCanvas);
2115
2116            // Restore text visibility of FolderIcon if necessary
2117            if (textVisible) {
2118                ((FolderIcon) v).setTextVisible(true);
2119            }
2120        }
2121        destCanvas.restore();
2122    }
2123
2124    /**
2125     * Returns a new bitmap to show when the given View is being dragged around.
2126     * Responsibility for the bitmap is transferred to the caller.
2127     */
2128    public Bitmap createDragBitmap(View v, Canvas canvas, int padding) {
2129        Bitmap b;
2130
2131        if (v instanceof TextView) {
2132            Drawable d = ((TextView) v).getCompoundDrawables()[1];
2133            b = Bitmap.createBitmap(d.getIntrinsicWidth() + padding,
2134                    d.getIntrinsicHeight() + padding, Bitmap.Config.ARGB_8888);
2135        } else {
2136            b = Bitmap.createBitmap(
2137                    v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2138        }
2139
2140        canvas.setBitmap(b);
2141        drawDragView(v, canvas, padding, true);
2142        canvas.setBitmap(null);
2143
2144        return b;
2145    }
2146
2147    /**
2148     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2149     * Responsibility for the bitmap is transferred to the caller.
2150     */
2151    private Bitmap createDragOutline(View v, Canvas canvas, int padding) {
2152        final int outlineColor = getResources().getColor(android.R.color.holo_blue_light);
2153        final Bitmap b = Bitmap.createBitmap(
2154                v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888);
2155
2156        canvas.setBitmap(b);
2157        drawDragView(v, canvas, padding, true);
2158        mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor);
2159        canvas.setBitmap(null);
2160        return b;
2161    }
2162
2163    /**
2164     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
2165     * Responsibility for the bitmap is transferred to the caller.
2166     */
2167    private Bitmap createDragOutline(Bitmap orig, Canvas canvas, int padding, int w, int h,
2168            boolean clipAlpha) {
2169        final int outlineColor = getResources().getColor(android.R.color.holo_blue_light);
2170        final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
2171        canvas.setBitmap(b);
2172
2173        Rect src = new Rect(0, 0, orig.getWidth(), orig.getHeight());
2174        float scaleFactor = Math.min((w - padding) / (float) orig.getWidth(),
2175                (h - padding) / (float) orig.getHeight());
2176        int scaledWidth = (int) (scaleFactor * orig.getWidth());
2177        int scaledHeight = (int) (scaleFactor * orig.getHeight());
2178        Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);
2179
2180        // center the image
2181        dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);
2182
2183        canvas.drawBitmap(orig, src, dst, null);
2184        mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor,
2185                clipAlpha);
2186        canvas.setBitmap(null);
2187
2188        return b;
2189    }
2190
2191    void startDrag(CellLayout.CellInfo cellInfo) {
2192        View child = cellInfo.cell;
2193
2194        // Make sure the drag was started by a long press as opposed to a long click.
2195        if (!child.isInTouchMode()) {
2196            return;
2197        }
2198
2199        mDragInfo = cellInfo;
2200        child.setVisibility(INVISIBLE);
2201        CellLayout layout = (CellLayout) child.getParent().getParent();
2202        layout.prepareChildForDrag(child);
2203
2204        child.clearFocus();
2205        child.setPressed(false);
2206
2207        final Canvas canvas = new Canvas();
2208
2209        // The outline is used to visualize where the item will land if dropped
2210        mDragOutline = createDragOutline(child, canvas, DRAG_BITMAP_PADDING);
2211        beginDragShared(child, this);
2212    }
2213
2214    public void beginDragShared(View child, DragSource source) {
2215        // The drag bitmap follows the touch point around on the screen
2216        final Bitmap b = createDragBitmap(child, new Canvas(), DRAG_BITMAP_PADDING);
2217
2218        final int bmpWidth = b.getWidth();
2219        final int bmpHeight = b.getHeight();
2220
2221        float scale = mLauncher.getDragLayer().getLocationInDragLayer(child, mTempXY);
2222        int dragLayerX =
2223                Math.round(mTempXY[0] - (bmpWidth - scale * child.getWidth()) / 2);
2224        int dragLayerY =
2225                Math.round(mTempXY[1] - (bmpHeight - scale * bmpHeight) / 2
2226                        - DRAG_BITMAP_PADDING / 2);
2227
2228        LauncherAppState app = LauncherAppState.getInstance();
2229        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
2230        Point dragVisualizeOffset = null;
2231        Rect dragRect = null;
2232        if (child instanceof BubbleTextView || child instanceof PagedViewIcon) {
2233            int iconSize = grid.iconSizePx;
2234            int top = child.getPaddingTop();
2235            int left = (bmpWidth - iconSize) / 2;
2236            int right = left + iconSize;
2237            int bottom = top + iconSize;
2238            dragLayerY += top;
2239            // Note: The drag region is used to calculate drag layer offsets, but the
2240            // dragVisualizeOffset in addition to the dragRect (the size) to position the outline.
2241            dragVisualizeOffset = new Point(-DRAG_BITMAP_PADDING / 2, DRAG_BITMAP_PADDING / 2);
2242            dragRect = new Rect(left, top, right, bottom);
2243        } else if (child instanceof FolderIcon) {
2244            int previewSize = grid.folderIconSizePx;
2245            dragRect = new Rect(0, child.getPaddingTop(), child.getWidth(), previewSize);
2246        }
2247
2248        // Clear the pressed state if necessary
2249        if (child instanceof BubbleTextView) {
2250            BubbleTextView icon = (BubbleTextView) child;
2251            icon.clearPressedOrFocusedBackground();
2252        }
2253
2254        mDragController.startDrag(b, dragLayerX, dragLayerY, source, child.getTag(),
2255                DragController.DRAG_ACTION_MOVE, dragVisualizeOffset, dragRect, scale);
2256
2257        if (child.getParent() instanceof ShortcutAndWidgetContainer) {
2258            mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent();
2259        }
2260
2261        b.recycle();
2262    }
2263
2264    void addApplicationShortcut(ShortcutInfo info, CellLayout target, long container, long screenId,
2265            int cellX, int cellY, boolean insertAtFirst, int intersectX, int intersectY) {
2266        View view = mLauncher.createShortcut(R.layout.application, target, (ShortcutInfo) info);
2267
2268        final int[] cellXY = new int[2];
2269        target.findCellForSpanThatIntersects(cellXY, 1, 1, intersectX, intersectY);
2270        addInScreen(view, container, screenId, cellXY[0], cellXY[1], 1, 1, insertAtFirst);
2271
2272        LauncherModel.addOrMoveItemInDatabase(mLauncher, info, container, screenId, cellXY[0],
2273                cellXY[1]);
2274    }
2275
2276    public boolean transitionStateShouldAllowDrop() {
2277        return ((!isSwitchingState() || mTransitionProgress > 0.5f) && mState != State.SMALL);
2278    }
2279
2280    /**
2281     * {@inheritDoc}
2282     */
2283    public boolean acceptDrop(DragObject d) {
2284        // If it's an external drop (e.g. from All Apps), check if it should be accepted
2285        CellLayout dropTargetLayout = mDropToLayout;
2286        if (d.dragSource != this) {
2287            // Don't accept the drop if we're not over a screen at time of drop
2288            if (dropTargetLayout == null) {
2289                return false;
2290            }
2291            if (!transitionStateShouldAllowDrop()) return false;
2292
2293            mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset,
2294                    d.dragView, mDragViewVisualCenter);
2295
2296            // We want the point to be mapped to the dragTarget.
2297            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2298                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2299            } else {
2300                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2301            }
2302
2303            int spanX = 1;
2304            int spanY = 1;
2305            if (mDragInfo != null) {
2306                final CellLayout.CellInfo dragCellInfo = mDragInfo;
2307                spanX = dragCellInfo.spanX;
2308                spanY = dragCellInfo.spanY;
2309            } else {
2310                final ItemInfo dragInfo = (ItemInfo) d.dragInfo;
2311                spanX = dragInfo.spanX;
2312                spanY = dragInfo.spanY;
2313            }
2314
2315            int minSpanX = spanX;
2316            int minSpanY = spanY;
2317            if (d.dragInfo instanceof PendingAddWidgetInfo) {
2318                minSpanX = ((PendingAddWidgetInfo) d.dragInfo).minSpanX;
2319                minSpanY = ((PendingAddWidgetInfo) d.dragInfo).minSpanY;
2320            }
2321
2322            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
2323                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, dropTargetLayout,
2324                    mTargetCell);
2325            float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2326                    mDragViewVisualCenter[1], mTargetCell);
2327            if (willCreateUserFolder((ItemInfo) d.dragInfo, dropTargetLayout,
2328                    mTargetCell, distance, true)) {
2329                return true;
2330            }
2331            if (willAddToExistingUserFolder((ItemInfo) d.dragInfo, dropTargetLayout,
2332                    mTargetCell, distance)) {
2333                return true;
2334            }
2335
2336            int[] resultSpan = new int[2];
2337            mTargetCell = dropTargetLayout.createArea((int) mDragViewVisualCenter[0],
2338                    (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
2339                    null, mTargetCell, resultSpan, CellLayout.MODE_ACCEPT_DROP);
2340            boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2341
2342            // Don't accept the drop if there's no room for the item
2343            if (!foundCell) {
2344                // Don't show the message if we are dropping on the AllApps button and the hotseat
2345                // is full
2346                boolean isHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2347                if (mTargetCell != null && isHotseat) {
2348                    Hotseat hotseat = mLauncher.getHotseat();
2349                    if (hotseat.isAllAppsButtonRank(
2350                            hotseat.getOrderInHotseat(mTargetCell[0], mTargetCell[1]))) {
2351                        return false;
2352                    }
2353                }
2354
2355                mLauncher.showOutOfSpaceMessage(isHotseat);
2356                return false;
2357            }
2358        }
2359
2360        long screenId = getIdForScreen(dropTargetLayout);
2361        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
2362            commitExtraEmptyScreen();
2363        }
2364
2365        return true;
2366    }
2367
2368    boolean willCreateUserFolder(ItemInfo info, CellLayout target, int[] targetCell, float
2369            distance, boolean considerTimeout) {
2370        if (distance > mMaxDistanceForFolderCreation) return false;
2371        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2372
2373        if (dropOverView != null) {
2374            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2375            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2376                return false;
2377            }
2378        }
2379
2380        boolean hasntMoved = false;
2381        if (mDragInfo != null) {
2382            hasntMoved = dropOverView == mDragInfo.cell;
2383        }
2384
2385        if (dropOverView == null || hasntMoved || (considerTimeout && !mCreateUserFolderOnDrop)) {
2386            return false;
2387        }
2388
2389        boolean aboveShortcut = (dropOverView.getTag() instanceof ShortcutInfo);
2390        boolean willBecomeShortcut =
2391                (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
2392                info.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT);
2393
2394        return (aboveShortcut && willBecomeShortcut);
2395    }
2396
2397    boolean willAddToExistingUserFolder(Object dragInfo, CellLayout target, int[] targetCell,
2398            float distance) {
2399        if (distance > mMaxDistanceForFolderCreation) return false;
2400        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2401
2402        if (dropOverView != null) {
2403            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
2404            if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.tmpCellY)) {
2405                return false;
2406            }
2407        }
2408
2409        if (dropOverView instanceof FolderIcon) {
2410            FolderIcon fi = (FolderIcon) dropOverView;
2411            if (fi.acceptDrop(dragInfo)) {
2412                return true;
2413            }
2414        }
2415        return false;
2416    }
2417
2418    boolean createUserFolderIfNecessary(View newView, long container, CellLayout target,
2419            int[] targetCell, float distance, boolean external, DragView dragView,
2420            Runnable postAnimationRunnable) {
2421        if (distance > mMaxDistanceForFolderCreation) return false;
2422        View v = target.getChildAt(targetCell[0], targetCell[1]);
2423
2424        boolean hasntMoved = false;
2425        if (mDragInfo != null) {
2426            CellLayout cellParent = getParentCellLayoutForView(mDragInfo.cell);
2427            hasntMoved = (mDragInfo.cellX == targetCell[0] &&
2428                    mDragInfo.cellY == targetCell[1]) && (cellParent == target);
2429        }
2430
2431        if (v == null || hasntMoved || !mCreateUserFolderOnDrop) return false;
2432        mCreateUserFolderOnDrop = false;
2433        final long screenId = (targetCell == null) ? mDragInfo.screenId : getIdForScreen(target);
2434
2435        boolean aboveShortcut = (v.getTag() instanceof ShortcutInfo);
2436        boolean willBecomeShortcut = (newView.getTag() instanceof ShortcutInfo);
2437
2438        if (aboveShortcut && willBecomeShortcut) {
2439            ShortcutInfo sourceInfo = (ShortcutInfo) newView.getTag();
2440            ShortcutInfo destInfo = (ShortcutInfo) v.getTag();
2441            // if the drag started here, we need to remove it from the workspace
2442            if (!external) {
2443                getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2444            }
2445
2446            Rect folderLocation = new Rect();
2447            float scale = mLauncher.getDragLayer().getDescendantRectRelativeToSelf(v, folderLocation);
2448            target.removeView(v);
2449
2450            FolderIcon fi =
2451                mLauncher.addFolder(target, container, screenId, targetCell[0], targetCell[1]);
2452            destInfo.cellX = -1;
2453            destInfo.cellY = -1;
2454            sourceInfo.cellX = -1;
2455            sourceInfo.cellY = -1;
2456
2457            // If the dragView is null, we can't animate
2458            boolean animate = dragView != null;
2459            if (animate) {
2460                fi.performCreateAnimation(destInfo, v, sourceInfo, dragView, folderLocation, scale,
2461                        postAnimationRunnable);
2462            } else {
2463                fi.addItem(destInfo);
2464                fi.addItem(sourceInfo);
2465            }
2466            return true;
2467        }
2468        return false;
2469    }
2470
2471    boolean addToExistingFolderIfNecessary(View newView, CellLayout target, int[] targetCell,
2472            float distance, DragObject d, boolean external) {
2473        if (distance > mMaxDistanceForFolderCreation) return false;
2474
2475        View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
2476        if (!mAddToExistingFolderOnDrop) return false;
2477        mAddToExistingFolderOnDrop = false;
2478
2479        if (dropOverView instanceof FolderIcon) {
2480            FolderIcon fi = (FolderIcon) dropOverView;
2481            if (fi.acceptDrop(d.dragInfo)) {
2482                fi.onDrop(d);
2483
2484                // if the drag started here, we need to remove it from the workspace
2485                if (!external) {
2486                    getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
2487                }
2488                return true;
2489            }
2490        }
2491        return false;
2492    }
2493
2494    public void onDrop(final DragObject d) {
2495        mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset, d.dragView,
2496                mDragViewVisualCenter);
2497
2498        CellLayout dropTargetLayout = mDropToLayout;
2499
2500        // We want the point to be mapped to the dragTarget.
2501        if (dropTargetLayout != null) {
2502            if (mLauncher.isHotseatLayout(dropTargetLayout)) {
2503                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
2504            } else {
2505                mapPointFromSelfToChild(dropTargetLayout, mDragViewVisualCenter, null);
2506            }
2507        }
2508
2509        int snapScreen = -1;
2510        boolean resizeOnDrop = false;
2511        if (d.dragSource != this) {
2512            final int[] touchXY = new int[] { (int) mDragViewVisualCenter[0],
2513                    (int) mDragViewVisualCenter[1] };
2514            onDropExternal(touchXY, d.dragInfo, dropTargetLayout, false, d);
2515        } else if (mDragInfo != null) {
2516            final View cell = mDragInfo.cell;
2517
2518            Runnable resizeRunnable = null;
2519            if (dropTargetLayout != null && !d.cancelled) {
2520                // Move internally
2521                boolean hasMovedLayouts = (getParentCellLayoutForView(cell) != dropTargetLayout);
2522                boolean hasMovedIntoHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
2523                long container = hasMovedIntoHotseat ?
2524                        LauncherSettings.Favorites.CONTAINER_HOTSEAT :
2525                        LauncherSettings.Favorites.CONTAINER_DESKTOP;
2526                long screenId = (mTargetCell[0] < 0) ?
2527                        mDragInfo.screenId : getIdForScreen(dropTargetLayout);
2528                int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
2529                int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
2530                // First we find the cell nearest to point at which the item is
2531                // dropped, without any consideration to whether there is an item there.
2532
2533                mTargetCell = findNearestArea((int) mDragViewVisualCenter[0], (int)
2534                        mDragViewVisualCenter[1], spanX, spanY, dropTargetLayout, mTargetCell);
2535                float distance = dropTargetLayout.getDistanceFromCell(mDragViewVisualCenter[0],
2536                        mDragViewVisualCenter[1], mTargetCell);
2537
2538                // If the item being dropped is a shortcut and the nearest drop
2539                // cell also contains a shortcut, then create a folder with the two shortcuts.
2540                if (!mInScrollArea && createUserFolderIfNecessary(cell, container,
2541                        dropTargetLayout, mTargetCell, distance, false, d.dragView, null)) {
2542                    stripEmptyScreens();
2543                    return;
2544                }
2545
2546                if (addToExistingFolderIfNecessary(cell, dropTargetLayout, mTargetCell,
2547                        distance, d, false)) {
2548                    stripEmptyScreens();
2549                    return;
2550                }
2551
2552                // Aside from the special case where we're dropping a shortcut onto a shortcut,
2553                // we need to find the nearest cell location that is vacant
2554                ItemInfo item = (ItemInfo) d.dragInfo;
2555                int minSpanX = item.spanX;
2556                int minSpanY = item.spanY;
2557                if (item.minSpanX > 0 && item.minSpanY > 0) {
2558                    minSpanX = item.minSpanX;
2559                    minSpanY = item.minSpanY;
2560                }
2561
2562                int[] resultSpan = new int[2];
2563                mTargetCell = dropTargetLayout.createArea((int) mDragViewVisualCenter[0],
2564                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY, cell,
2565                        mTargetCell, resultSpan, CellLayout.MODE_ON_DROP);
2566
2567                boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
2568
2569                // if the widget resizes on drop
2570                if (foundCell && (cell instanceof AppWidgetHostView) &&
2571                        (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY)) {
2572                    resizeOnDrop = true;
2573                    item.spanX = resultSpan[0];
2574                    item.spanY = resultSpan[1];
2575                    AppWidgetHostView awhv = (AppWidgetHostView) cell;
2576                    AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, resultSpan[0],
2577                            resultSpan[1]);
2578                }
2579
2580                if (getScreenIdForPageIndex(mCurrentPage) != screenId && !hasMovedIntoHotseat) {
2581                    snapScreen = getPageIndexForScreenId(screenId);
2582                    snapToPage(snapScreen);
2583                }
2584
2585                if (foundCell) {
2586                    final ItemInfo info = (ItemInfo) cell.getTag();
2587                    if (hasMovedLayouts) {
2588                        // Reparent the view
2589                        getParentCellLayoutForView(cell).removeView(cell);
2590                        addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
2591                                info.spanX, info.spanY);
2592                    }
2593
2594                    // update the item's position after drop
2595                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2596                    lp.cellX = lp.tmpCellX = mTargetCell[0];
2597                    lp.cellY = lp.tmpCellY = mTargetCell[1];
2598                    lp.cellHSpan = item.spanX;
2599                    lp.cellVSpan = item.spanY;
2600                    lp.isLockedToGrid = true;
2601                    cell.setId(LauncherModel.getCellLayoutChildId(container, mDragInfo.screenId,
2602                            mTargetCell[0], mTargetCell[1], mDragInfo.spanX, mDragInfo.spanY));
2603
2604                    if (container != LauncherSettings.Favorites.CONTAINER_HOTSEAT &&
2605                            cell instanceof LauncherAppWidgetHostView) {
2606                        final CellLayout cellLayout = dropTargetLayout;
2607                        // We post this call so that the widget has a chance to be placed
2608                        // in its final location
2609
2610                        final LauncherAppWidgetHostView hostView = (LauncherAppWidgetHostView) cell;
2611                        AppWidgetProviderInfo pinfo = hostView.getAppWidgetInfo();
2612                        if (pinfo != null &&
2613                                pinfo.resizeMode != AppWidgetProviderInfo.RESIZE_NONE) {
2614                            final Runnable addResizeFrame = new Runnable() {
2615                                public void run() {
2616                                    DragLayer dragLayer = mLauncher.getDragLayer();
2617                                    dragLayer.addResizeFrame(info, hostView, cellLayout);
2618                                }
2619                            };
2620                            resizeRunnable = (new Runnable() {
2621                                public void run() {
2622                                    if (!isPageMoving()) {
2623                                        addResizeFrame.run();
2624                                    } else {
2625                                        mDelayedResizeRunnable = addResizeFrame;
2626                                    }
2627                                }
2628                            });
2629                        }
2630                    }
2631
2632                    LauncherModel.moveItemInDatabase(mLauncher, info, container, screenId, lp.cellX,
2633                            lp.cellY);
2634                } else {
2635                    // If we can't find a drop location, we return the item to its original position
2636                    CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
2637                    mTargetCell[0] = lp.cellX;
2638                    mTargetCell[1] = lp.cellY;
2639                    CellLayout layout = (CellLayout) cell.getParent().getParent();
2640                    layout.markCellsAsOccupiedForView(cell);
2641                }
2642            }
2643
2644            final CellLayout parent = (CellLayout) cell.getParent().getParent();
2645            final Runnable finalResizeRunnable = resizeRunnable;
2646            // Prepare it to be animated into its new position
2647            // This must be called after the view has been re-parented
2648            final Runnable onCompleteRunnable = new Runnable() {
2649                @Override
2650                public void run() {
2651                    mAnimatingViewIntoPlace = false;
2652                    updateChildrenLayersEnabled(false);
2653                    if (finalResizeRunnable != null) {
2654                        finalResizeRunnable.run();
2655                    }
2656                    stripEmptyScreens();
2657                }
2658            };
2659            mAnimatingViewIntoPlace = true;
2660            if (d.dragView.hasDrawn()) {
2661                final ItemInfo info = (ItemInfo) cell.getTag();
2662                if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET) {
2663                    int animationType = resizeOnDrop ? ANIMATE_INTO_POSITION_AND_RESIZE :
2664                            ANIMATE_INTO_POSITION_AND_DISAPPEAR;
2665                    animateWidgetDrop(info, parent, d.dragView,
2666                            onCompleteRunnable, animationType, cell, false);
2667                } else {
2668                    int duration = snapScreen < 0 ? -1 : ADJACENT_SCREEN_DROP_DURATION;
2669                    mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
2670                            onCompleteRunnable, this);
2671                }
2672            } else {
2673                d.deferDragViewCleanupPostAnimation = false;
2674                cell.setVisibility(VISIBLE);
2675            }
2676            parent.onDropChild(cell);
2677        }
2678    }
2679
2680    public void setFinalScrollForPageChange(int pageIndex) {
2681        CellLayout cl = (CellLayout) getChildAt(pageIndex);
2682        if (cl != null) {
2683            mSavedScrollX = getScrollX();
2684            mSavedTranslationX = cl.getTranslationX();
2685            mSavedRotationY = cl.getRotationY();
2686            final int newX = getScrollForPage(pageIndex);
2687            setScrollX(newX);
2688            cl.setTranslationX(0f);
2689            cl.setRotationY(0f);
2690        }
2691    }
2692
2693    public void resetFinalScrollForPageChange(int pageIndex) {
2694        if (pageIndex >= 0) {
2695            CellLayout cl = (CellLayout) getChildAt(pageIndex);
2696            setScrollX(mSavedScrollX);
2697            cl.setTranslationX(mSavedTranslationX);
2698            cl.setRotationY(mSavedRotationY);
2699        }
2700    }
2701
2702    public void getViewLocationRelativeToSelf(View v, int[] location) {
2703        getLocationInWindow(location);
2704        int x = location[0];
2705        int y = location[1];
2706
2707        v.getLocationInWindow(location);
2708        int vX = location[0];
2709        int vY = location[1];
2710
2711        location[0] = vX - x;
2712        location[1] = vY - y;
2713    }
2714
2715    public void onDragEnter(DragObject d) {
2716        mDragEnforcer.onDragEnter();
2717        mCreateUserFolderOnDrop = false;
2718        mAddToExistingFolderOnDrop = false;
2719
2720        mDropToLayout = null;
2721        CellLayout layout = getCurrentDropLayout();
2722        setCurrentDropLayout(layout);
2723        setCurrentDragOverlappingLayout(layout);
2724
2725        // Because we don't have space in the Phone UI (the CellLayouts run to the edge) we
2726        // don't need to show the outlines
2727        if (LauncherAppState.getInstance().isScreenLarge()) {
2728            showOutlines();
2729        }
2730    }
2731
2732    static Rect getCellLayoutMetrics(Launcher launcher, int orientation) {
2733        LauncherAppState app = LauncherAppState.getInstance();
2734        DeviceProfile grid = app.getDynamicGrid().getDeviceProfile();
2735
2736        Resources res = launcher.getResources();
2737        Display display = launcher.getWindowManager().getDefaultDisplay();
2738        Point smallestSize = new Point();
2739        Point largestSize = new Point();
2740        display.getCurrentSizeRange(smallestSize, largestSize);
2741        int countX = (int) grid.numColumns;
2742        int countY = (int) grid.numRows;
2743        if (orientation == CellLayout.LANDSCAPE) {
2744            if (mLandscapeCellLayoutMetrics == null) {
2745                Rect padding = grid.getWorkspacePadding(CellLayout.LANDSCAPE);
2746                int width = largestSize.x - padding.left - padding.right;
2747                int height = smallestSize.y - padding.top - padding.bottom;
2748                mLandscapeCellLayoutMetrics = new Rect();
2749                CellLayout.getMetrics(mLandscapeCellLayoutMetrics, width, height,
2750                        countX, countY);
2751            }
2752            return mLandscapeCellLayoutMetrics;
2753        } else if (orientation == CellLayout.PORTRAIT) {
2754            if (mPortraitCellLayoutMetrics == null) {
2755                Rect padding = grid.getWorkspacePadding(CellLayout.PORTRAIT);
2756                int width = smallestSize.x - padding.left - padding.right;
2757                int height = largestSize.y - padding.top - padding.bottom;
2758                mPortraitCellLayoutMetrics = new Rect();
2759                CellLayout.getMetrics(mPortraitCellLayoutMetrics, width, height,
2760                        countX, countY);
2761            }
2762            return mPortraitCellLayoutMetrics;
2763        }
2764        return null;
2765    }
2766
2767    public void onDragExit(DragObject d) {
2768        mDragEnforcer.onDragExit();
2769
2770        // Here we store the final page that will be dropped to, if the workspace in fact
2771        // receives the drop
2772        if (mInScrollArea) {
2773            if (isPageMoving()) {
2774                // If the user drops while the page is scrolling, we should use that page as the
2775                // destination instead of the page that is being hovered over.
2776                mDropToLayout = (CellLayout) getPageAt(getNextPage());
2777            } else {
2778                mDropToLayout = mDragOverlappingLayout;
2779            }
2780        } else {
2781            mDropToLayout = mDragTargetLayout;
2782        }
2783
2784        if (mDragMode == DRAG_MODE_CREATE_FOLDER) {
2785            mCreateUserFolderOnDrop = true;
2786        } else if (mDragMode == DRAG_MODE_ADD_TO_FOLDER) {
2787            mAddToExistingFolderOnDrop = true;
2788        }
2789
2790        // Reset the scroll area and previous drag target
2791        onResetScrollArea();
2792        setCurrentDropLayout(null);
2793        setCurrentDragOverlappingLayout(null);
2794
2795        mSpringLoadedDragController.cancel();
2796
2797        if (!mIsPageMoving) {
2798            hideOutlines();
2799        }
2800    }
2801
2802    void setCurrentDropLayout(CellLayout layout) {
2803        if (mDragTargetLayout != null) {
2804            mDragTargetLayout.revertTempState();
2805            mDragTargetLayout.onDragExit();
2806        }
2807        mDragTargetLayout = layout;
2808        if (mDragTargetLayout != null) {
2809            mDragTargetLayout.onDragEnter();
2810        }
2811        cleanupReorder(true);
2812        cleanupFolderCreation();
2813        setCurrentDropOverCell(-1, -1);
2814    }
2815
2816    void setCurrentDragOverlappingLayout(CellLayout layout) {
2817        if (mDragOverlappingLayout != null) {
2818            mDragOverlappingLayout.setIsDragOverlapping(false);
2819        }
2820        mDragOverlappingLayout = layout;
2821        if (mDragOverlappingLayout != null) {
2822            mDragOverlappingLayout.setIsDragOverlapping(true);
2823        }
2824        invalidate();
2825    }
2826
2827    void setCurrentDropOverCell(int x, int y) {
2828        if (x != mDragOverX || y != mDragOverY) {
2829            mDragOverX = x;
2830            mDragOverY = y;
2831            setDragMode(DRAG_MODE_NONE);
2832        }
2833    }
2834
2835    void setDragMode(int dragMode) {
2836        if (dragMode != mDragMode) {
2837            if (dragMode == DRAG_MODE_NONE) {
2838                cleanupAddToFolder();
2839                // We don't want to cancel the re-order alarm every time the target cell changes
2840                // as this feels to slow / unresponsive.
2841                cleanupReorder(false);
2842                cleanupFolderCreation();
2843            } else if (dragMode == DRAG_MODE_ADD_TO_FOLDER) {
2844                cleanupReorder(true);
2845                cleanupFolderCreation();
2846            } else if (dragMode == DRAG_MODE_CREATE_FOLDER) {
2847                cleanupAddToFolder();
2848                cleanupReorder(true);
2849            } else if (dragMode == DRAG_MODE_REORDER) {
2850                cleanupAddToFolder();
2851                cleanupFolderCreation();
2852            }
2853            mDragMode = dragMode;
2854        }
2855    }
2856
2857    private void cleanupFolderCreation() {
2858        if (mDragFolderRingAnimator != null) {
2859            mDragFolderRingAnimator.animateToNaturalState();
2860        }
2861        mFolderCreationAlarm.cancelAlarm();
2862    }
2863
2864    private void cleanupAddToFolder() {
2865        if (mDragOverFolderIcon != null) {
2866            mDragOverFolderIcon.onDragExit(null);
2867            mDragOverFolderIcon = null;
2868        }
2869    }
2870
2871    private void cleanupReorder(boolean cancelAlarm) {
2872        // Any pending reorders are canceled
2873        if (cancelAlarm) {
2874            mReorderAlarm.cancelAlarm();
2875        }
2876        mLastReorderX = -1;
2877        mLastReorderY = -1;
2878    }
2879
2880   /*
2881    *
2882    * Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's
2883    * coordinate space. The argument xy is modified with the return result.
2884    *
2885    * if cachedInverseMatrix is not null, this method will just use that matrix instead of
2886    * computing it itself; we use this to avoid redundant matrix inversions in
2887    * findMatchingPageForDragOver
2888    *
2889    */
2890   void mapPointFromSelfToChild(View v, float[] xy, Matrix cachedInverseMatrix) {
2891       xy[0] = xy[0] - v.getLeft();
2892       xy[1] = xy[1] - v.getTop();
2893   }
2894
2895   boolean isPointInSelfOverHotseat(int x, int y, Rect r) {
2896       if (r == null) {
2897           r = new Rect();
2898       }
2899       mTempPt[0] = x;
2900       mTempPt[1] = y;
2901       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
2902       mLauncher.getHotseat().getHitRect(r);
2903       if (r.contains(mTempPt[0], mTempPt[1])) {
2904           return true;
2905       }
2906       return false;
2907   }
2908
2909   void mapPointFromSelfToHotseatLayout(Hotseat hotseat, float[] xy) {
2910       mTempPt[0] = (int) xy[0];
2911       mTempPt[1] = (int) xy[1];
2912       mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, mTempPt, true);
2913       mLauncher.getDragLayer().mapCoordInSelfToDescendent(hotseat.getLayout(), mTempPt);
2914
2915       xy[0] = mTempPt[0];
2916       xy[1] = mTempPt[1];
2917   }
2918
2919   /*
2920    *
2921    * Convert the 2D coordinate xy from this CellLayout's coordinate space to
2922    * the parent View's coordinate space. The argument xy is modified with the return result.
2923    *
2924    */
2925   void mapPointFromChildToSelf(View v, float[] xy) {
2926       xy[0] += v.getLeft();
2927       xy[1] += v.getTop();
2928   }
2929
2930   static private float squaredDistance(float[] point1, float[] point2) {
2931        float distanceX = point1[0] - point2[0];
2932        float distanceY = point2[1] - point2[1];
2933        return distanceX * distanceX + distanceY * distanceY;
2934   }
2935
2936    /*
2937     *
2938     * This method returns the CellLayout that is currently being dragged to. In order to drag
2939     * to a CellLayout, either the touch point must be directly over the CellLayout, or as a second
2940     * strategy, we see if the dragView is overlapping any CellLayout and choose the closest one
2941     *
2942     * Return null if no CellLayout is currently being dragged over
2943     *
2944     */
2945    private CellLayout findMatchingPageForDragOver(
2946            DragView dragView, float originX, float originY, boolean exact) {
2947        // We loop through all the screens (ie CellLayouts) and see which ones overlap
2948        // with the item being dragged and then choose the one that's closest to the touch point
2949        final int screenCount = getChildCount();
2950        CellLayout bestMatchingScreen = null;
2951        float smallestDistSoFar = Float.MAX_VALUE;
2952
2953        for (int i = 0; i < screenCount; i++) {
2954            CellLayout cl = (CellLayout) getChildAt(i);
2955
2956            final float[] touchXy = {originX, originY};
2957            // Transform the touch coordinates to the CellLayout's local coordinates
2958            // If the touch point is within the bounds of the cell layout, we can return immediately
2959            cl.getMatrix().invert(mTempInverseMatrix);
2960            mapPointFromSelfToChild(cl, touchXy, mTempInverseMatrix);
2961
2962            if (touchXy[0] >= 0 && touchXy[0] <= cl.getWidth() &&
2963                    touchXy[1] >= 0 && touchXy[1] <= cl.getHeight()) {
2964                return cl;
2965            }
2966
2967            if (!exact) {
2968                // Get the center of the cell layout in screen coordinates
2969                final float[] cellLayoutCenter = mTempCellLayoutCenterCoordinates;
2970                cellLayoutCenter[0] = cl.getWidth()/2;
2971                cellLayoutCenter[1] = cl.getHeight()/2;
2972                mapPointFromChildToSelf(cl, cellLayoutCenter);
2973
2974                touchXy[0] = originX;
2975                touchXy[1] = originY;
2976
2977                // Calculate the distance between the center of the CellLayout
2978                // and the touch point
2979                float dist = squaredDistance(touchXy, cellLayoutCenter);
2980
2981                if (dist < smallestDistSoFar) {
2982                    smallestDistSoFar = dist;
2983                    bestMatchingScreen = cl;
2984                }
2985            }
2986        }
2987        return bestMatchingScreen;
2988    }
2989
2990    // This is used to compute the visual center of the dragView. This point is then
2991    // used to visualize drop locations and determine where to drop an item. The idea is that
2992    // the visual center represents the user's interpretation of where the item is, and hence
2993    // is the appropriate point to use when determining drop location.
2994    private float[] getDragViewVisualCenter(int x, int y, int xOffset, int yOffset,
2995            DragView dragView, float[] recycle) {
2996        float res[];
2997        if (recycle == null) {
2998            res = new float[2];
2999        } else {
3000            res = recycle;
3001        }
3002
3003        // First off, the drag view has been shifted in a way that is not represented in the
3004        // x and y values or the x/yOffsets. Here we account for that shift.
3005        x += getResources().getDimensionPixelSize(R.dimen.dragViewOffsetX);
3006        y += getResources().getDimensionPixelSize(R.dimen.dragViewOffsetY);
3007
3008        // These represent the visual top and left of drag view if a dragRect was provided.
3009        // If a dragRect was not provided, then they correspond to the actual view left and
3010        // top, as the dragRect is in that case taken to be the entire dragView.
3011        // R.dimen.dragViewOffsetY.
3012        int left = x - xOffset;
3013        int top = y - yOffset;
3014
3015        // In order to find the visual center, we shift by half the dragRect
3016        res[0] = left + dragView.getDragRegion().width() / 2;
3017        res[1] = top + dragView.getDragRegion().height() / 2;
3018
3019        return res;
3020    }
3021
3022    private boolean isDragWidget(DragObject d) {
3023        return (d.dragInfo instanceof LauncherAppWidgetInfo ||
3024                d.dragInfo instanceof PendingAddWidgetInfo);
3025    }
3026    private boolean isExternalDragWidget(DragObject d) {
3027        return d.dragSource != this && isDragWidget(d);
3028    }
3029
3030    public void onDragOver(DragObject d) {
3031        // Skip drag over events while we are dragging over side pages
3032        if (mInScrollArea || mIsSwitchingState || mState == State.SMALL) return;
3033
3034        Rect r = new Rect();
3035        CellLayout layout = null;
3036        ItemInfo item = (ItemInfo) d.dragInfo;
3037
3038        // Ensure that we have proper spans for the item that we are dropping
3039        if (item.spanX < 0 || item.spanY < 0) throw new RuntimeException("Improper spans found");
3040        mDragViewVisualCenter = getDragViewVisualCenter(d.x, d.y, d.xOffset, d.yOffset,
3041            d.dragView, mDragViewVisualCenter);
3042
3043        final View child = (mDragInfo == null) ? null : mDragInfo.cell;
3044        // Identify whether we have dragged over a side page
3045        if (isSmall()) {
3046            if (mLauncher.getHotseat() != null && !isExternalDragWidget(d)) {
3047                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3048                    layout = mLauncher.getHotseat().getLayout();
3049                }
3050            }
3051            if (layout == null) {
3052                layout = findMatchingPageForDragOver(d.dragView, d.x, d.y, false);
3053            }
3054            if (layout != mDragTargetLayout) {
3055                setCurrentDropLayout(layout);
3056                setCurrentDragOverlappingLayout(layout);
3057
3058                boolean isInSpringLoadedMode = (mState == State.SPRING_LOADED);
3059                if (isInSpringLoadedMode) {
3060                    if (mLauncher.isHotseatLayout(layout)) {
3061                        mSpringLoadedDragController.cancel();
3062                    } else {
3063                        mSpringLoadedDragController.setAlarm(mDragTargetLayout);
3064                    }
3065                }
3066            }
3067        } else {
3068            // Test to see if we are over the hotseat otherwise just use the current page
3069            if (mLauncher.getHotseat() != null && !isDragWidget(d)) {
3070                if (isPointInSelfOverHotseat(d.x, d.y, r)) {
3071                    layout = mLauncher.getHotseat().getLayout();
3072                }
3073            }
3074            if (layout == null) {
3075                layout = getCurrentDropLayout();
3076            }
3077            if (layout != mDragTargetLayout) {
3078                setCurrentDropLayout(layout);
3079                setCurrentDragOverlappingLayout(layout);
3080            }
3081        }
3082
3083        // Handle the drag over
3084        if (mDragTargetLayout != null) {
3085            // We want the point to be mapped to the dragTarget.
3086            if (mLauncher.isHotseatLayout(mDragTargetLayout)) {
3087                mapPointFromSelfToHotseatLayout(mLauncher.getHotseat(), mDragViewVisualCenter);
3088            } else {
3089                mapPointFromSelfToChild(mDragTargetLayout, mDragViewVisualCenter, null);
3090            }
3091
3092            ItemInfo info = (ItemInfo) d.dragInfo;
3093
3094            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3095                    (int) mDragViewVisualCenter[1], item.spanX, item.spanY,
3096                    mDragTargetLayout, mTargetCell);
3097
3098            setCurrentDropOverCell(mTargetCell[0], mTargetCell[1]);
3099
3100            float targetCellDistance = mDragTargetLayout.getDistanceFromCell(
3101                    mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
3102
3103            final View dragOverView = mDragTargetLayout.getChildAt(mTargetCell[0],
3104                    mTargetCell[1]);
3105
3106            manageFolderFeedback(info, mDragTargetLayout, mTargetCell,
3107                    targetCellDistance, dragOverView);
3108
3109            int minSpanX = item.spanX;
3110            int minSpanY = item.spanY;
3111            if (item.minSpanX > 0 && item.minSpanY > 0) {
3112                minSpanX = item.minSpanX;
3113                minSpanY = item.minSpanY;
3114            }
3115
3116            boolean nearestDropOccupied = mDragTargetLayout.isNearestDropLocationOccupied((int)
3117                    mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1], item.spanX,
3118                    item.spanY, child, mTargetCell);
3119
3120            if (!nearestDropOccupied) {
3121                mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3122                        (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3123                        mTargetCell[0], mTargetCell[1], item.spanX, item.spanY, false,
3124                        d.dragView.getDragVisualizeOffset(), d.dragView.getDragRegion());
3125            } else if ((mDragMode == DRAG_MODE_NONE || mDragMode == DRAG_MODE_REORDER)
3126                    && !mReorderAlarm.alarmPending() && (mLastReorderX != mTargetCell[0] ||
3127                    mLastReorderY != mTargetCell[1])) {
3128
3129                // Otherwise, if we aren't adding to or creating a folder and there's no pending
3130                // reorder, then we schedule a reorder
3131                ReorderAlarmListener listener = new ReorderAlarmListener(mDragViewVisualCenter,
3132                        minSpanX, minSpanY, item.spanX, item.spanY, d.dragView, child);
3133                mReorderAlarm.setOnAlarmListener(listener);
3134                mReorderAlarm.setAlarm(REORDER_TIMEOUT);
3135            }
3136
3137            if (mDragMode == DRAG_MODE_CREATE_FOLDER || mDragMode == DRAG_MODE_ADD_TO_FOLDER ||
3138                    !nearestDropOccupied) {
3139                if (mDragTargetLayout != null) {
3140                    mDragTargetLayout.revertTempState();
3141                }
3142            }
3143        }
3144    }
3145
3146    private void manageFolderFeedback(ItemInfo info, CellLayout targetLayout,
3147            int[] targetCell, float distance, View dragOverView) {
3148        boolean userFolderPending = willCreateUserFolder(info, targetLayout, targetCell, distance,
3149                false);
3150
3151        if (mDragMode == DRAG_MODE_NONE && userFolderPending &&
3152                !mFolderCreationAlarm.alarmPending()) {
3153            mFolderCreationAlarm.setOnAlarmListener(new
3154                    FolderCreationAlarmListener(targetLayout, targetCell[0], targetCell[1]));
3155            mFolderCreationAlarm.setAlarm(FOLDER_CREATION_TIMEOUT);
3156            return;
3157        }
3158
3159        boolean willAddToFolder =
3160                willAddToExistingUserFolder(info, targetLayout, targetCell, distance);
3161
3162        if (willAddToFolder && mDragMode == DRAG_MODE_NONE) {
3163            mDragOverFolderIcon = ((FolderIcon) dragOverView);
3164            mDragOverFolderIcon.onDragEnter(info);
3165            if (targetLayout != null) {
3166                targetLayout.clearDragOutlines();
3167            }
3168            setDragMode(DRAG_MODE_ADD_TO_FOLDER);
3169            return;
3170        }
3171
3172        if (mDragMode == DRAG_MODE_ADD_TO_FOLDER && !willAddToFolder) {
3173            setDragMode(DRAG_MODE_NONE);
3174        }
3175        if (mDragMode == DRAG_MODE_CREATE_FOLDER && !userFolderPending) {
3176            setDragMode(DRAG_MODE_NONE);
3177        }
3178
3179        return;
3180    }
3181
3182    class FolderCreationAlarmListener implements OnAlarmListener {
3183        CellLayout layout;
3184        int cellX;
3185        int cellY;
3186
3187        public FolderCreationAlarmListener(CellLayout layout, int cellX, int cellY) {
3188            this.layout = layout;
3189            this.cellX = cellX;
3190            this.cellY = cellY;
3191        }
3192
3193        public void onAlarm(Alarm alarm) {
3194            if (mDragFolderRingAnimator == null) {
3195                mDragFolderRingAnimator = new FolderRingAnimator(mLauncher, null);
3196            }
3197            mDragFolderRingAnimator.setCell(cellX, cellY);
3198            mDragFolderRingAnimator.setCellLayout(layout);
3199            mDragFolderRingAnimator.animateToAcceptState();
3200            layout.showFolderAccept(mDragFolderRingAnimator);
3201            layout.clearDragOutlines();
3202            setDragMode(DRAG_MODE_CREATE_FOLDER);
3203        }
3204    }
3205
3206    class ReorderAlarmListener implements OnAlarmListener {
3207        float[] dragViewCenter;
3208        int minSpanX, minSpanY, spanX, spanY;
3209        DragView dragView;
3210        View child;
3211
3212        public ReorderAlarmListener(float[] dragViewCenter, int minSpanX, int minSpanY, int spanX,
3213                int spanY, DragView dragView, View child) {
3214            this.dragViewCenter = dragViewCenter;
3215            this.minSpanX = minSpanX;
3216            this.minSpanY = minSpanY;
3217            this.spanX = spanX;
3218            this.spanY = spanY;
3219            this.child = child;
3220            this.dragView = dragView;
3221        }
3222
3223        public void onAlarm(Alarm alarm) {
3224            int[] resultSpan = new int[2];
3225            mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
3226                    (int) mDragViewVisualCenter[1], spanX, spanY, mDragTargetLayout, mTargetCell);
3227            mLastReorderX = mTargetCell[0];
3228            mLastReorderY = mTargetCell[1];
3229
3230            mTargetCell = mDragTargetLayout.createArea((int) mDragViewVisualCenter[0],
3231                (int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
3232                child, mTargetCell, resultSpan, CellLayout.MODE_DRAG_OVER);
3233
3234            if (mTargetCell[0] < 0 || mTargetCell[1] < 0) {
3235                mDragTargetLayout.revertTempState();
3236            } else {
3237                setDragMode(DRAG_MODE_REORDER);
3238            }
3239
3240            boolean resize = resultSpan[0] != spanX || resultSpan[1] != spanY;
3241            mDragTargetLayout.visualizeDropLocation(child, mDragOutline,
3242                (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1],
3243                mTargetCell[0], mTargetCell[1], resultSpan[0], resultSpan[1], resize,
3244                dragView.getDragVisualizeOffset(), dragView.getDragRegion());
3245        }
3246    }
3247
3248    @Override
3249    public void getHitRectRelativeToDragLayer(Rect outRect) {
3250        // We want the workspace to have the whole area of the display (it will find the correct
3251        // cell layout to drop to in the existing drag/drop logic.
3252        mLauncher.getDragLayer().getDescendantRectRelativeToSelf(this, outRect);
3253    }
3254
3255    /**
3256     * Add the item specified by dragInfo to the given layout.
3257     * @return true if successful
3258     */
3259    public boolean addExternalItemToScreen(ItemInfo dragInfo, CellLayout layout) {
3260        if (layout.findCellForSpan(mTempEstimate, dragInfo.spanX, dragInfo.spanY)) {
3261            onDropExternal(dragInfo.dropPos, (ItemInfo) dragInfo, (CellLayout) layout, false);
3262            return true;
3263        }
3264        mLauncher.showOutOfSpaceMessage(mLauncher.isHotseatLayout(layout));
3265        return false;
3266    }
3267
3268    private void onDropExternal(int[] touchXY, Object dragInfo,
3269            CellLayout cellLayout, boolean insertAtFirst) {
3270        onDropExternal(touchXY, dragInfo, cellLayout, insertAtFirst, null);
3271    }
3272
3273    /**
3274     * Drop an item that didn't originate on one of the workspace screens.
3275     * It may have come from Launcher (e.g. from all apps or customize), or it may have
3276     * come from another app altogether.
3277     *
3278     * NOTE: This can also be called when we are outside of a drag event, when we want
3279     * to add an item to one of the workspace screens.
3280     */
3281    private void onDropExternal(final int[] touchXY, final Object dragInfo,
3282            final CellLayout cellLayout, boolean insertAtFirst, DragObject d) {
3283        final Runnable exitSpringLoadedRunnable = new Runnable() {
3284            @Override
3285            public void run() {
3286                mLauncher.exitSpringLoadedDragModeDelayed(true, false, null);
3287            }
3288        };
3289
3290        ItemInfo info = (ItemInfo) dragInfo;
3291        int spanX = info.spanX;
3292        int spanY = info.spanY;
3293        if (mDragInfo != null) {
3294            spanX = mDragInfo.spanX;
3295            spanY = mDragInfo.spanY;
3296        }
3297
3298        final long container = mLauncher.isHotseatLayout(cellLayout) ?
3299                LauncherSettings.Favorites.CONTAINER_HOTSEAT :
3300                    LauncherSettings.Favorites.CONTAINER_DESKTOP;
3301        final long screenId = getIdForScreen(cellLayout);
3302        if (!mLauncher.isHotseatLayout(cellLayout)
3303                && screenId != getScreenIdForPageIndex(mCurrentPage)
3304                && mState != State.SPRING_LOADED) {
3305            snapToScreenId(screenId, null);
3306        }
3307
3308        if (info instanceof PendingAddItemInfo) {
3309            final PendingAddItemInfo pendingInfo = (PendingAddItemInfo) dragInfo;
3310
3311            boolean findNearestVacantCell = true;
3312            if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
3313                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3314                        cellLayout, mTargetCell);
3315                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3316                        mDragViewVisualCenter[1], mTargetCell);
3317                if (willCreateUserFolder((ItemInfo) d.dragInfo, cellLayout, mTargetCell,
3318                        distance, true) || willAddToExistingUserFolder((ItemInfo) d.dragInfo,
3319                                cellLayout, mTargetCell, distance)) {
3320                    findNearestVacantCell = false;
3321                }
3322            }
3323
3324            final ItemInfo item = (ItemInfo) d.dragInfo;
3325            boolean updateWidgetSize = false;
3326            if (findNearestVacantCell) {
3327                int minSpanX = item.spanX;
3328                int minSpanY = item.spanY;
3329                if (item.minSpanX > 0 && item.minSpanY > 0) {
3330                    minSpanX = item.minSpanX;
3331                    minSpanY = item.minSpanY;
3332                }
3333                int[] resultSpan = new int[2];
3334                mTargetCell = cellLayout.createArea((int) mDragViewVisualCenter[0],
3335                        (int) mDragViewVisualCenter[1], minSpanX, minSpanY, info.spanX, info.spanY,
3336                        null, mTargetCell, resultSpan, CellLayout.MODE_ON_DROP_EXTERNAL);
3337
3338                if (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY) {
3339                    updateWidgetSize = true;
3340                }
3341                item.spanX = resultSpan[0];
3342                item.spanY = resultSpan[1];
3343            }
3344
3345            Runnable onAnimationCompleteRunnable = new Runnable() {
3346                @Override
3347                public void run() {
3348                    // When dragging and dropping from customization tray, we deal with creating
3349                    // widgets/shortcuts/folders in a slightly different way
3350                    switch (pendingInfo.itemType) {
3351                    case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
3352                        int span[] = new int[2];
3353                        span[0] = item.spanX;
3354                        span[1] = item.spanY;
3355                        mLauncher.addAppWidgetFromDrop((PendingAddWidgetInfo) pendingInfo,
3356                                container, screenId, mTargetCell, span, null);
3357                        break;
3358                    case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
3359                        mLauncher.processShortcutFromDrop(pendingInfo.componentName,
3360                                container, screenId, mTargetCell, null);
3361                        break;
3362                    default:
3363                        throw new IllegalStateException("Unknown item type: " +
3364                                pendingInfo.itemType);
3365                    }
3366                }
3367            };
3368            View finalView = pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
3369                    ? ((PendingAddWidgetInfo) pendingInfo).boundWidget : null;
3370
3371            if (finalView instanceof AppWidgetHostView && updateWidgetSize) {
3372                AppWidgetHostView awhv = (AppWidgetHostView) finalView;
3373                AppWidgetResizeFrame.updateWidgetSizeRanges(awhv, mLauncher, item.spanX,
3374                        item.spanY);
3375            }
3376
3377            int animationStyle = ANIMATE_INTO_POSITION_AND_DISAPPEAR;
3378            if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET &&
3379                    ((PendingAddWidgetInfo) pendingInfo).info.configure != null) {
3380                animationStyle = ANIMATE_INTO_POSITION_AND_REMAIN;
3381            }
3382            animateWidgetDrop(info, cellLayout, d.dragView, onAnimationCompleteRunnable,
3383                    animationStyle, finalView, true);
3384        } else {
3385            // This is for other drag/drop cases, like dragging from All Apps
3386            View view = null;
3387
3388            switch (info.itemType) {
3389            case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION:
3390            case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
3391                if (info.container == NO_ID && info instanceof AppInfo) {
3392                    // Came from all apps -- make a copy
3393                    info = new ShortcutInfo((AppInfo) info);
3394                }
3395                view = mLauncher.createShortcut(R.layout.application, cellLayout,
3396                        (ShortcutInfo) info);
3397                break;
3398            case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
3399                view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, cellLayout,
3400                        (FolderInfo) info, mIconCache);
3401                break;
3402            default:
3403                throw new IllegalStateException("Unknown item type: " + info.itemType);
3404            }
3405
3406            // First we find the cell nearest to point at which the item is
3407            // dropped, without any consideration to whether there is an item there.
3408            if (touchXY != null) {
3409                mTargetCell = findNearestArea((int) touchXY[0], (int) touchXY[1], spanX, spanY,
3410                        cellLayout, mTargetCell);
3411                float distance = cellLayout.getDistanceFromCell(mDragViewVisualCenter[0],
3412                        mDragViewVisualCenter[1], mTargetCell);
3413                d.postAnimationRunnable = exitSpringLoadedRunnable;
3414                if (createUserFolderIfNecessary(view, container, cellLayout, mTargetCell, distance,
3415                        true, d.dragView, d.postAnimationRunnable)) {
3416                    return;
3417                }
3418                if (addToExistingFolderIfNecessary(view, cellLayout, mTargetCell, distance, d,
3419                        true)) {
3420                    return;
3421                }
3422            }
3423
3424            if (touchXY != null) {
3425                // when dragging and dropping, just find the closest free spot
3426                mTargetCell = cellLayout.createArea((int) mDragViewVisualCenter[0],
3427                        (int) mDragViewVisualCenter[1], 1, 1, 1, 1,
3428                        null, mTargetCell, null, CellLayout.MODE_ON_DROP_EXTERNAL);
3429            } else {
3430                cellLayout.findCellForSpan(mTargetCell, 1, 1);
3431            }
3432            addInScreen(view, container, screenId, mTargetCell[0], mTargetCell[1], info.spanX,
3433                    info.spanY, insertAtFirst);
3434            cellLayout.onDropChild(view);
3435            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams();
3436            cellLayout.getShortcutsAndWidgets().measureChild(view);
3437
3438            LauncherModel.addOrMoveItemInDatabase(mLauncher, info, container, screenId,
3439                    lp.cellX, lp.cellY);
3440
3441            if (d.dragView != null) {
3442                // We wrap the animation call in the temporary set and reset of the current
3443                // cellLayout to its final transform -- this means we animate the drag view to
3444                // the correct final location.
3445                setFinalTransitionTransform(cellLayout);
3446                mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, view,
3447                        exitSpringLoadedRunnable);
3448                resetTransitionTransform(cellLayout);
3449            }
3450        }
3451    }
3452
3453    public Bitmap createWidgetBitmap(ItemInfo widgetInfo, View layout) {
3454        int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(widgetInfo.spanX,
3455                widgetInfo.spanY, widgetInfo, false);
3456        int visibility = layout.getVisibility();
3457        layout.setVisibility(VISIBLE);
3458
3459        int width = MeasureSpec.makeMeasureSpec(unScaledSize[0], MeasureSpec.EXACTLY);
3460        int height = MeasureSpec.makeMeasureSpec(unScaledSize[1], MeasureSpec.EXACTLY);
3461        Bitmap b = Bitmap.createBitmap(unScaledSize[0], unScaledSize[1],
3462                Bitmap.Config.ARGB_8888);
3463        Canvas c = new Canvas(b);
3464
3465        layout.measure(width, height);
3466        layout.layout(0, 0, unScaledSize[0], unScaledSize[1]);
3467        layout.draw(c);
3468        c.setBitmap(null);
3469        layout.setVisibility(visibility);
3470        return b;
3471    }
3472
3473    private void getFinalPositionForDropAnimation(int[] loc, float[] scaleXY,
3474            DragView dragView, CellLayout layout, ItemInfo info, int[] targetCell,
3475            boolean external, boolean scale) {
3476        // Now we animate the dragView, (ie. the widget or shortcut preview) into its final
3477        // location and size on the home screen.
3478        int spanX = info.spanX;
3479        int spanY = info.spanY;
3480
3481        Rect r = estimateItemPosition(layout, info, targetCell[0], targetCell[1], spanX, spanY);
3482        loc[0] = r.left;
3483        loc[1] = r.top;
3484
3485        setFinalTransitionTransform(layout);
3486        float cellLayoutScale =
3487                mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(layout, loc, true);
3488        resetTransitionTransform(layout);
3489
3490        float dragViewScaleX;
3491        float dragViewScaleY;
3492        if (scale) {
3493            dragViewScaleX = (1.0f * r.width()) / dragView.getMeasuredWidth();
3494            dragViewScaleY = (1.0f * r.height()) / dragView.getMeasuredHeight();
3495        } else {
3496            dragViewScaleX = 1f;
3497            dragViewScaleY = 1f;
3498        }
3499
3500        // The animation will scale the dragView about its center, so we need to center about
3501        // the final location.
3502        loc[0] -= (dragView.getMeasuredWidth() - cellLayoutScale * r.width()) / 2;
3503        loc[1] -= (dragView.getMeasuredHeight() - cellLayoutScale * r.height()) / 2;
3504
3505        scaleXY[0] = dragViewScaleX * cellLayoutScale;
3506        scaleXY[1] = dragViewScaleY * cellLayoutScale;
3507    }
3508
3509    public void animateWidgetDrop(ItemInfo info, CellLayout cellLayout, DragView dragView,
3510            final Runnable onCompleteRunnable, int animationType, final View finalView,
3511            boolean external) {
3512        Rect from = new Rect();
3513        mLauncher.getDragLayer().getViewRectRelativeToSelf(dragView, from);
3514
3515        int[] finalPos = new int[2];
3516        float scaleXY[] = new float[2];
3517        boolean scalePreview = !(info instanceof PendingAddShortcutInfo);
3518        getFinalPositionForDropAnimation(finalPos, scaleXY, dragView, cellLayout, info, mTargetCell,
3519                external, scalePreview);
3520
3521        Resources res = mLauncher.getResources();
3522        int duration = res.getInteger(R.integer.config_dropAnimMaxDuration) - 200;
3523
3524        // In the case where we've prebound the widget, we remove it from the DragLayer
3525        if (finalView instanceof AppWidgetHostView && external) {
3526            Log.d(TAG, "6557954 Animate widget drop, final view is appWidgetHostView");
3527            mLauncher.getDragLayer().removeView(finalView);
3528        }
3529        if ((animationType == ANIMATE_INTO_POSITION_AND_RESIZE || external) && finalView != null) {
3530            Bitmap crossFadeBitmap = createWidgetBitmap(info, finalView);
3531            dragView.setCrossFadeBitmap(crossFadeBitmap);
3532            dragView.crossFade((int) (duration * 0.8f));
3533        } else if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET && external) {
3534            scaleXY[0] = scaleXY[1] = Math.min(scaleXY[0],  scaleXY[1]);
3535        }
3536
3537        DragLayer dragLayer = mLauncher.getDragLayer();
3538        if (animationType == CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION) {
3539            mLauncher.getDragLayer().animateViewIntoPosition(dragView, finalPos, 0f, 0.1f, 0.1f,
3540                    DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
3541        } else {
3542            int endStyle;
3543            if (animationType == ANIMATE_INTO_POSITION_AND_REMAIN) {
3544                endStyle = DragLayer.ANIMATION_END_REMAIN_VISIBLE;
3545            } else {
3546                endStyle = DragLayer.ANIMATION_END_DISAPPEAR;;
3547            }
3548
3549            Runnable onComplete = new Runnable() {
3550                @Override
3551                public void run() {
3552                    if (finalView != null) {
3553                        finalView.setVisibility(VISIBLE);
3554                    }
3555                    if (onCompleteRunnable != null) {
3556                        onCompleteRunnable.run();
3557                    }
3558                }
3559            };
3560            dragLayer.animateViewIntoPosition(dragView, from.left, from.top, finalPos[0],
3561                    finalPos[1], 1, 1, 1, scaleXY[0], scaleXY[1], onComplete, endStyle,
3562                    duration, this);
3563        }
3564    }
3565
3566    public void setFinalTransitionTransform(CellLayout layout) {
3567        if (isSwitchingState()) {
3568            mCurrentScale = getScaleX();
3569            setScaleX(mNewScale);
3570            setScaleY(mNewScale);
3571        }
3572    }
3573    public void resetTransitionTransform(CellLayout layout) {
3574        if (isSwitchingState()) {
3575            setScaleX(mCurrentScale);
3576            setScaleY(mCurrentScale);
3577        }
3578    }
3579
3580    /**
3581     * Return the current {@link CellLayout}, correctly picking the destination
3582     * screen while a scroll is in progress.
3583     */
3584    public CellLayout getCurrentDropLayout() {
3585        return (CellLayout) getChildAt(getNextPage());
3586    }
3587
3588    /**
3589     * Return the current CellInfo describing our current drag; this method exists
3590     * so that Launcher can sync this object with the correct info when the activity is created/
3591     * destroyed
3592     *
3593     */
3594    public CellLayout.CellInfo getDragInfo() {
3595        return mDragInfo;
3596    }
3597
3598    /**
3599     * Calculate the nearest cell where the given object would be dropped.
3600     *
3601     * pixelX and pixelY should be in the coordinate system of layout
3602     */
3603    private int[] findNearestArea(int pixelX, int pixelY,
3604            int spanX, int spanY, CellLayout layout, int[] recycle) {
3605        return layout.findNearestArea(
3606                pixelX, pixelY, spanX, spanY, recycle);
3607    }
3608
3609    void setup(DragController dragController) {
3610        mSpringLoadedDragController = new SpringLoadedDragController(mLauncher);
3611        mDragController = dragController;
3612
3613        // hardware layers on children are enabled on startup, but should be disabled until
3614        // needed
3615        updateChildrenLayersEnabled(false);
3616        setWallpaperDimension();
3617    }
3618
3619    /**
3620     * Called at the end of a drag which originated on the workspace.
3621     */
3622    public void onDropCompleted(final View target, final DragObject d,
3623            final boolean isFlingToDelete, final boolean success) {
3624        if (mDeferDropAfterUninstall) {
3625            mDeferredAction = new Runnable() {
3626                    public void run() {
3627                        onDropCompleted(target, d, isFlingToDelete, success);
3628                        mDeferredAction = null;
3629                    }
3630                };
3631            return;
3632        }
3633
3634        boolean beingCalledAfterUninstall = mDeferredAction != null;
3635
3636        if (success && !(beingCalledAfterUninstall && !mUninstallSuccessful)) {
3637            if (target != this && mDragInfo != null) {
3638                CellLayout parentCell = getParentCellLayoutForView(mDragInfo.cell);
3639                if (parentCell != null) {
3640                    parentCell.removeView(mDragInfo.cell);
3641                }
3642                if (mDragInfo.cell instanceof DropTarget) {
3643                    mDragController.removeDropTarget((DropTarget) mDragInfo.cell);
3644                }
3645                // If we move the item to anything not on the Workspace, check if any empty
3646                // screens need to be removed. If we dropped back on the workspace, this will
3647                // be done post drop animation.
3648                stripEmptyScreens();
3649            }
3650        } else if (mDragInfo != null) {
3651            CellLayout cellLayout;
3652            if (mLauncher.isHotseatLayout(target)) {
3653                cellLayout = mLauncher.getHotseat().getLayout();
3654            } else {
3655                cellLayout = getScreenWithId(mDragInfo.screenId);
3656            }
3657            cellLayout.onDropChild(mDragInfo.cell);
3658        }
3659        if ((d.cancelled || (beingCalledAfterUninstall && !mUninstallSuccessful))
3660                && mDragInfo.cell != null) {
3661            mDragInfo.cell.setVisibility(VISIBLE);
3662        }
3663        mDragOutline = null;
3664        mDragInfo = null;
3665    }
3666
3667    public void deferCompleteDropAfterUninstallActivity() {
3668        mDeferDropAfterUninstall = true;
3669    }
3670
3671    /// maybe move this into a smaller part
3672    public void onUninstallActivityReturned(boolean success) {
3673        mDeferDropAfterUninstall = false;
3674        mUninstallSuccessful = success;
3675        if (mDeferredAction != null) {
3676            mDeferredAction.run();
3677        }
3678    }
3679
3680    void updateItemLocationsInDatabase(CellLayout cl) {
3681        int count = cl.getShortcutsAndWidgets().getChildCount();
3682
3683        long screenId = getIdForScreen(cl);
3684        int container = Favorites.CONTAINER_DESKTOP;
3685
3686        if (mLauncher.isHotseatLayout(cl)) {
3687            screenId = -1;
3688            container = Favorites.CONTAINER_HOTSEAT;
3689        }
3690
3691        for (int i = 0; i < count; i++) {
3692            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3693            ItemInfo info = (ItemInfo) v.getTag();
3694            // Null check required as the AllApps button doesn't have an item info
3695            if (info != null && info.requiresDbUpdate) {
3696                info.requiresDbUpdate = false;
3697                LauncherModel.modifyItemInDatabase(mLauncher, info, container, screenId, info.cellX,
3698                        info.cellY, info.spanX, info.spanY);
3699            }
3700        }
3701    }
3702
3703    ArrayList<ComponentName> getUniqueComponents(boolean stripDuplicates, ArrayList<ComponentName> duplicates) {
3704        ArrayList<ComponentName> uniqueIntents = new ArrayList<ComponentName>();
3705        getUniqueIntents((CellLayout) mLauncher.getHotseat().getLayout(), uniqueIntents, duplicates, false);
3706        int count = getChildCount();
3707        for (int i = 0; i < count; i++) {
3708            CellLayout cl = (CellLayout) getChildAt(i);
3709            getUniqueIntents(cl, uniqueIntents, duplicates, false);
3710        }
3711        return uniqueIntents;
3712    }
3713
3714    void getUniqueIntents(CellLayout cl, ArrayList<ComponentName> uniqueIntents,
3715            ArrayList<ComponentName> duplicates, boolean stripDuplicates) {
3716        int count = cl.getShortcutsAndWidgets().getChildCount();
3717
3718        ArrayList<View> children = new ArrayList<View>();
3719        for (int i = 0; i < count; i++) {
3720            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3721            children.add(v);
3722        }
3723
3724        for (int i = 0; i < count; i++) {
3725            View v = children.get(i);
3726            ItemInfo info = (ItemInfo) v.getTag();
3727            // Null check required as the AllApps button doesn't have an item info
3728            if (info instanceof ShortcutInfo) {
3729                ShortcutInfo si = (ShortcutInfo) info;
3730                ComponentName cn = si.intent.getComponent();
3731
3732                Uri dataUri = si.intent.getData();
3733                // If dataUri is not null / empty or if this component isn't one that would
3734                // have previously showed up in the AllApps list, then this is a widget-type
3735                // shortcut, so ignore it.
3736                if (dataUri != null && !dataUri.equals(Uri.EMPTY)) {
3737                    continue;
3738                }
3739
3740                if (!uniqueIntents.contains(cn)) {
3741                    uniqueIntents.add(cn);
3742                } else {
3743                    if (stripDuplicates) {
3744                        cl.removeViewInLayout(v);
3745                        LauncherModel.deleteItemFromDatabase(mLauncher, si);
3746                    }
3747                    if (duplicates != null) {
3748                        duplicates.add(cn);
3749                    }
3750                }
3751            }
3752            if (v instanceof FolderIcon) {
3753                FolderIcon fi = (FolderIcon) v;
3754                ArrayList<View> items = fi.getFolder().getItemsInReadingOrder();
3755                for (int j = 0; j < items.size(); j++) {
3756                    if (items.get(j).getTag() instanceof ShortcutInfo) {
3757                        ShortcutInfo si = (ShortcutInfo) items.get(j).getTag();
3758                        ComponentName cn = si.intent.getComponent();
3759
3760                        Uri dataUri = si.intent.getData();
3761                        // If dataUri is not null / empty or if this component isn't one that would
3762                        // have previously showed up in the AllApps list, then this is a widget-type
3763                        // shortcut, so ignore it.
3764                        if (dataUri != null && !dataUri.equals(Uri.EMPTY)) {
3765                            continue;
3766                        }
3767
3768                        if (!uniqueIntents.contains(cn)) {
3769                            uniqueIntents.add(cn);
3770                        }  else {
3771                            if (stripDuplicates) {
3772                                fi.getFolderInfo().remove(si);
3773                                LauncherModel.deleteItemFromDatabase(mLauncher, si);
3774                            }
3775                            if (duplicates != null) {
3776                                duplicates.add(cn);
3777                            }
3778                        }
3779                    }
3780                }
3781            }
3782        }
3783    }
3784
3785    void saveWorkspaceToDb() {
3786        saveWorkspaceScreenToDb((CellLayout) mLauncher.getHotseat().getLayout());
3787        int count = getChildCount();
3788        for (int i = 0; i < count; i++) {
3789            CellLayout cl = (CellLayout) getChildAt(i);
3790            saveWorkspaceScreenToDb(cl);
3791        }
3792    }
3793
3794    void saveWorkspaceScreenToDb(CellLayout cl) {
3795        int count = cl.getShortcutsAndWidgets().getChildCount();
3796
3797        long screenId = getIdForScreen(cl);
3798        int container = Favorites.CONTAINER_DESKTOP;
3799
3800        Hotseat hotseat = mLauncher.getHotseat();
3801        if (mLauncher.isHotseatLayout(cl)) {
3802            screenId = -1;
3803            container = Favorites.CONTAINER_HOTSEAT;
3804        }
3805
3806        for (int i = 0; i < count; i++) {
3807            View v = cl.getShortcutsAndWidgets().getChildAt(i);
3808            ItemInfo info = (ItemInfo) v.getTag();
3809            // Null check required as the AllApps button doesn't have an item info
3810            if (info != null) {
3811                int cellX = info.cellX;
3812                int cellY = info.cellY;
3813                if (container == Favorites.CONTAINER_HOTSEAT) {
3814                    cellX = hotseat.getCellXFromOrder((int) info.screenId);
3815                    cellY = hotseat.getCellYFromOrder((int) info.screenId);
3816                }
3817                LauncherModel.addItemToDatabase(mLauncher, info, container, screenId, cellX,
3818                        cellY, false);
3819            }
3820            if (v instanceof FolderIcon) {
3821                FolderIcon fi = (FolderIcon) v;
3822                fi.getFolder().addItemLocationsInDatabase();
3823            }
3824        }
3825    }
3826
3827    @Override
3828    public boolean supportsFlingToDelete() {
3829        return true;
3830    }
3831
3832    @Override
3833    public void onFlingToDelete(DragObject d, int x, int y, PointF vec) {
3834        // Do nothing
3835    }
3836
3837    @Override
3838    public void onFlingToDeleteCompleted() {
3839        // Do nothing
3840    }
3841
3842    public boolean isDropEnabled() {
3843        return true;
3844    }
3845
3846    @Override
3847    protected void onRestoreInstanceState(Parcelable state) {
3848        super.onRestoreInstanceState(state);
3849        Launcher.setScreen(mCurrentPage);
3850    }
3851
3852    @Override
3853    protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) {
3854        // We don't dispatch restoreInstanceState to our children using this code path.
3855        // Some pages will be restored immediately as their items are bound immediately, and
3856        // others we will need to wait until after their items are bound.
3857        mSavedStates = container;
3858    }
3859
3860    public void restoreInstanceStateForChild(int child) {
3861        if (mSavedStates != null) {
3862            mRestoredPages.add(child);
3863            CellLayout cl = (CellLayout) getChildAt(child);
3864            cl.restoreInstanceState(mSavedStates);
3865        }
3866    }
3867
3868    public void restoreInstanceStateForRemainingPages() {
3869        int count = getChildCount();
3870        for (int i = 0; i < count; i++) {
3871            if (!mRestoredPages.contains(i)) {
3872                restoreInstanceStateForChild(i);
3873            }
3874        }
3875        mRestoredPages.clear();
3876    }
3877
3878    @Override
3879    public void scrollLeft() {
3880        if (!isSmall() && !mIsSwitchingState) {
3881            super.scrollLeft();
3882        }
3883        Folder openFolder = getOpenFolder();
3884        if (openFolder != null) {
3885            openFolder.completeDragExit();
3886        }
3887    }
3888
3889    @Override
3890    public void scrollRight() {
3891        if (!isSmall() && !mIsSwitchingState) {
3892            super.scrollRight();
3893        }
3894        Folder openFolder = getOpenFolder();
3895        if (openFolder != null) {
3896            openFolder.completeDragExit();
3897        }
3898    }
3899
3900    @Override
3901    public boolean onEnterScrollArea(int x, int y, int direction) {
3902        // Ignore the scroll area if we are dragging over the hot seat
3903        boolean isPortrait = !LauncherAppState.isScreenLandscape(getContext());
3904        if (mLauncher.getHotseat() != null && isPortrait) {
3905            Rect r = new Rect();
3906            mLauncher.getHotseat().getHitRect(r);
3907            if (r.contains(x, y)) {
3908                return false;
3909            }
3910        }
3911
3912        boolean result = false;
3913        if (!isSmall() && !mIsSwitchingState && getOpenFolder() == null) {
3914            mInScrollArea = true;
3915
3916            final int page = getNextPage() +
3917                       (direction == DragController.SCROLL_LEFT ? -1 : 1);
3918            // We always want to exit the current layout to ensure parity of enter / exit
3919            setCurrentDropLayout(null);
3920
3921            if (0 <= page && page < getChildCount()) {
3922                // Ensure that we are not dragging over to the custom content screen
3923                if (getScreenIdForPageIndex(page) == CUSTOM_CONTENT_SCREEN_ID) {
3924                    return false;
3925                }
3926
3927                CellLayout layout = (CellLayout) getChildAt(page);
3928                setCurrentDragOverlappingLayout(layout);
3929
3930                // Workspace is responsible for drawing the edge glow on adjacent pages,
3931                // so we need to redraw the workspace when this may have changed.
3932                invalidate();
3933                result = true;
3934            }
3935        }
3936        return result;
3937    }
3938
3939    @Override
3940    public boolean onExitScrollArea() {
3941        boolean result = false;
3942        if (mInScrollArea) {
3943            invalidate();
3944            CellLayout layout = getCurrentDropLayout();
3945            setCurrentDropLayout(layout);
3946            setCurrentDragOverlappingLayout(layout);
3947
3948            result = true;
3949            mInScrollArea = false;
3950        }
3951        return result;
3952    }
3953
3954    private void onResetScrollArea() {
3955        setCurrentDragOverlappingLayout(null);
3956        mInScrollArea = false;
3957    }
3958
3959    /**
3960     * Returns a specific CellLayout
3961     */
3962    CellLayout getParentCellLayoutForView(View v) {
3963        ArrayList<CellLayout> layouts = getWorkspaceAndHotseatCellLayouts();
3964        for (CellLayout layout : layouts) {
3965            if (layout.getShortcutsAndWidgets().indexOfChild(v) > -1) {
3966                return layout;
3967            }
3968        }
3969        return null;
3970    }
3971
3972    /**
3973     * Returns a list of all the CellLayouts in the workspace.
3974     */
3975    ArrayList<CellLayout> getWorkspaceAndHotseatCellLayouts() {
3976        ArrayList<CellLayout> layouts = new ArrayList<CellLayout>();
3977        int screenCount = getChildCount();
3978        for (int screen = 0; screen < screenCount; screen++) {
3979            layouts.add(((CellLayout) getChildAt(screen)));
3980        }
3981        if (mLauncher.getHotseat() != null) {
3982            layouts.add(mLauncher.getHotseat().getLayout());
3983        }
3984        return layouts;
3985    }
3986
3987    /**
3988     * We should only use this to search for specific children.  Do not use this method to modify
3989     * ShortcutsAndWidgetsContainer directly. Includes ShortcutAndWidgetContainers from
3990     * the hotseat and workspace pages
3991     */
3992    ArrayList<ShortcutAndWidgetContainer> getAllShortcutAndWidgetContainers() {
3993        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
3994                new ArrayList<ShortcutAndWidgetContainer>();
3995        int screenCount = getChildCount();
3996        for (int screen = 0; screen < screenCount; screen++) {
3997            childrenLayouts.add(((CellLayout) getChildAt(screen)).getShortcutsAndWidgets());
3998        }
3999        if (mLauncher.getHotseat() != null) {
4000            childrenLayouts.add(mLauncher.getHotseat().getLayout().getShortcutsAndWidgets());
4001        }
4002        return childrenLayouts;
4003    }
4004
4005    public Folder getFolderForTag(Object tag) {
4006        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4007                getAllShortcutAndWidgetContainers();
4008        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4009            int count = layout.getChildCount();
4010            for (int i = 0; i < count; i++) {
4011                View child = layout.getChildAt(i);
4012                if (child instanceof Folder) {
4013                    Folder f = (Folder) child;
4014                    if (f.getInfo() == tag && f.getInfo().opened) {
4015                        return f;
4016                    }
4017                }
4018            }
4019        }
4020        return null;
4021    }
4022
4023    public View getViewForTag(Object tag) {
4024        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4025                getAllShortcutAndWidgetContainers();
4026        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4027            int count = layout.getChildCount();
4028            for (int i = 0; i < count; i++) {
4029                View child = layout.getChildAt(i);
4030                if (child.getTag() == tag) {
4031                    return child;
4032                }
4033            }
4034        }
4035        return null;
4036    }
4037
4038    void clearDropTargets() {
4039        ArrayList<ShortcutAndWidgetContainer> childrenLayouts =
4040                getAllShortcutAndWidgetContainers();
4041        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4042            int childCount = layout.getChildCount();
4043            for (int j = 0; j < childCount; j++) {
4044                View v = layout.getChildAt(j);
4045                if (v instanceof DropTarget) {
4046                    mDragController.removeDropTarget((DropTarget) v);
4047                }
4048            }
4049        }
4050    }
4051
4052    // Removes ALL items that match a given package name, this is usually called when a package
4053    // has been removed and we want to remove all components (widgets, shortcuts, apps) that
4054    // belong to that package.
4055    void removeItemsByPackageName(final ArrayList<String> packages) {
4056        final HashSet<String> packageNames = new HashSet<String>();
4057        packageNames.addAll(packages);
4058
4059        // Filter out all the ItemInfos that this is going to affect
4060        final HashSet<ItemInfo> infos = new HashSet<ItemInfo>();
4061        final HashSet<ComponentName> cns = new HashSet<ComponentName>();
4062        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4063        for (CellLayout layoutParent : cellLayouts) {
4064            ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4065            int childCount = layout.getChildCount();
4066            for (int i = 0; i < childCount; ++i) {
4067                View view = layout.getChildAt(i);
4068                infos.add((ItemInfo) view.getTag());
4069            }
4070        }
4071        LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4072            @Override
4073            public boolean filterItem(ItemInfo parent, ItemInfo info,
4074                                      ComponentName cn) {
4075                if (packageNames.contains(cn.getPackageName())) {
4076                    cns.add(cn);
4077                    return true;
4078                }
4079                return false;
4080            }
4081        };
4082        LauncherModel.filterItemInfos(infos, filter);
4083
4084        // Remove the affected components
4085        removeItemsByComponentName(cns);
4086    }
4087
4088    // Removes items that match the application info specified, when applications are removed
4089    // as a part of an update, this is called to ensure that other widgets and application
4090    // shortcuts are not removed.
4091    void removeItemsByApplicationInfo(final ArrayList<AppInfo> appInfos) {
4092        // Just create a hash table of all the specific components that this will affect
4093        HashSet<ComponentName> cns = new HashSet<ComponentName>();
4094        for (AppInfo info : appInfos) {
4095            cns.add(info.componentName);
4096        }
4097
4098        // Remove all the things
4099        removeItemsByComponentName(cns);
4100    }
4101
4102    void removeItemsByComponentName(final HashSet<ComponentName> componentNames) {
4103        ArrayList<CellLayout> cellLayouts = getWorkspaceAndHotseatCellLayouts();
4104        for (final CellLayout layoutParent: cellLayouts) {
4105            final ViewGroup layout = layoutParent.getShortcutsAndWidgets();
4106
4107            final HashMap<ItemInfo, View> children = new HashMap<ItemInfo, View>();
4108            for (int j = 0; j < layout.getChildCount(); j++) {
4109                final View view = layout.getChildAt(j);
4110                children.put((ItemInfo) view.getTag(), view);
4111            }
4112
4113            final ArrayList<View> childrenToRemove = new ArrayList<View>();
4114            final HashMap<FolderInfo, ArrayList<ShortcutInfo>> folderAppsToRemove =
4115                    new HashMap<FolderInfo, ArrayList<ShortcutInfo>>();
4116            LauncherModel.ItemInfoFilter filter = new LauncherModel.ItemInfoFilter() {
4117                @Override
4118                public boolean filterItem(ItemInfo parent, ItemInfo info,
4119                                          ComponentName cn) {
4120                    if (parent instanceof FolderInfo) {
4121                        if (componentNames.contains(cn)) {
4122                            FolderInfo folder = (FolderInfo) parent;
4123                            ArrayList<ShortcutInfo> appsToRemove;
4124                            if (folderAppsToRemove.containsKey(folder)) {
4125                                appsToRemove = folderAppsToRemove.get(folder);
4126                            } else {
4127                                appsToRemove = new ArrayList<ShortcutInfo>();
4128                                folderAppsToRemove.put(folder, appsToRemove);
4129                            }
4130                            appsToRemove.add((ShortcutInfo) info);
4131                            return true;
4132                        }
4133                    } else {
4134                        if (componentNames.contains(cn)) {
4135                            childrenToRemove.add(children.get(info));
4136                            return true;
4137                        }
4138                    }
4139                    return false;
4140                }
4141            };
4142            LauncherModel.filterItemInfos(children.keySet(), filter);
4143
4144            // Remove all the apps from their folders
4145            for (FolderInfo folder : folderAppsToRemove.keySet()) {
4146                ArrayList<ShortcutInfo> appsToRemove = folderAppsToRemove.get(folder);
4147                for (ShortcutInfo info : appsToRemove) {
4148                    folder.remove(info);
4149                }
4150            }
4151
4152            // Remove all the other children
4153            for (View child : childrenToRemove) {
4154                // Note: We can not remove the view directly from CellLayoutChildren as this
4155                // does not re-mark the spaces as unoccupied.
4156                layoutParent.removeViewInLayout(child);
4157                if (child instanceof DropTarget) {
4158                    mDragController.removeDropTarget((DropTarget) child);
4159                }
4160            }
4161
4162            if (childrenToRemove.size() > 0) {
4163                layout.requestLayout();
4164                layout.invalidate();
4165            }
4166        }
4167
4168        // Strip all the empty screens
4169        stripEmptyScreens();
4170    }
4171
4172    void updateShortcuts(ArrayList<AppInfo> apps) {
4173        ArrayList<ShortcutAndWidgetContainer> childrenLayouts = getAllShortcutAndWidgetContainers();
4174        for (ShortcutAndWidgetContainer layout: childrenLayouts) {
4175            int childCount = layout.getChildCount();
4176            for (int j = 0; j < childCount; j++) {
4177                final View view = layout.getChildAt(j);
4178                Object tag = view.getTag();
4179
4180                if (LauncherModel.isShortcutInfoUpdateable((ItemInfo) tag)) {
4181                    ShortcutInfo info = (ShortcutInfo) tag;
4182
4183                    final Intent intent = info.intent;
4184                    final ComponentName name = intent.getComponent();
4185                    final int appCount = apps.size();
4186                    for (int k = 0; k < appCount; k++) {
4187                        AppInfo app = apps.get(k);
4188                        if (app.componentName.equals(name)) {
4189                            BubbleTextView shortcut = (BubbleTextView) view;
4190                            info.updateIcon(mIconCache);
4191                            info.title = app.title.toString();
4192                            shortcut.applyFromShortcutInfo(info, mIconCache);
4193                        }
4194                    }
4195                }
4196            }
4197        }
4198    }
4199
4200    private void moveToScreen(int page, boolean animate) {
4201        if (!isSmall()) {
4202            if (animate) {
4203                snapToPage(page);
4204            } else {
4205                setCurrentPage(page);
4206            }
4207        }
4208        View child = getChildAt(page);
4209        if (child != null) {
4210            child.requestFocus();
4211        }
4212    }
4213
4214    void moveToDefaultScreen(boolean animate) {
4215        moveToScreen(mDefaultPage, animate);
4216    }
4217
4218    void moveToCustomContentScreen(boolean animate) {
4219        if (hasCustomContent()) {
4220            int ccIndex = getPageIndexForScreenId(CUSTOM_CONTENT_SCREEN_ID);
4221            if (animate) {
4222                snapToPage(ccIndex);
4223            } else {
4224                setCurrentPage(ccIndex);
4225            }
4226            View child = getChildAt(ccIndex);
4227            if (child != null) {
4228                child.requestFocus();
4229            }
4230         }
4231    }
4232
4233    @Override
4234    protected PageIndicator.PageMarkerResources getPageIndicatorMarker(int pageIndex) {
4235        long screenId = getScreenIdForPageIndex(pageIndex);
4236        if (screenId == EXTRA_EMPTY_SCREEN_ID) {
4237            int count = mScreenOrder.size() - (hasCustomContent() ? 1 : 0);
4238            if (count > 1) {
4239                return new PageIndicator.PageMarkerResources(R.drawable.ic_pageindicator_add,
4240                        R.drawable.ic_pageindicator_add);
4241            }
4242        }
4243
4244        return super.getPageIndicatorMarker(pageIndex);
4245    }
4246
4247    @Override
4248    public void syncPages() {
4249    }
4250
4251    @Override
4252    public void syncPageItems(int page, boolean immediate) {
4253    }
4254
4255    protected String getCurrentPageDescription() {
4256        int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
4257        return String.format(getContext().getString(R.string.workspace_scroll_format),
4258                page + 1, getChildCount());
4259    }
4260
4261    public void getLocationInDragLayer(int[] loc) {
4262        mLauncher.getDragLayer().getLocationInDragLayer(this, loc);
4263    }
4264}
4265