content: /*
   * Copyright (C) 2008 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.launcher3.folder;
  
  import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_EXIT_DELAY;
  import static com.android.launcher3.LauncherState.NORMAL;
  import static com.android.launcher3.compat.AccessibilityManagerCompat.sendCustomAccessibilityEvent;
  
  import android.animation.Animator;
  import android.animation.AnimatorListenerAdapter;
  import android.animation.AnimatorSet;
  import android.annotation.SuppressLint;
  import android.appwidget.AppWidgetHostView;
  import android.content.Context;
  import android.graphics.Canvas;
  import android.graphics.Path;
  import android.graphics.Rect;
  import android.text.InputType;
  import android.text.Selection;
  import android.text.TextUtils;
  import android.util.AttributeSet;
  import android.util.Log;
  import android.util.Pair;
  import android.view.FocusFinder;
  import android.view.KeyEvent;
  import android.view.MotionEvent;
  import android.view.View;
  import android.view.ViewDebug;
  import android.view.accessibility.AccessibilityEvent;
  import android.view.animation.AnimationUtils;
  import android.view.inputmethod.EditorInfo;
  import android.widget.TextView;
  
  import com.android.launcher3.AbstractFloatingView;
  import com.android.launcher3.Alarm;
  import com.android.launcher3.AppInfo;
  import com.android.launcher3.BubbleTextView;
  import com.android.launcher3.CellLayout;
  import com.android.launcher3.DeviceProfile;
  import com.android.launcher3.DragSource;
  import com.android.launcher3.DropTarget;
  import com.android.launcher3.ExtendedEditText;
  import com.android.launcher3.FolderInfo;
  import com.android.launcher3.FolderInfo.FolderListener;
  import com.android.launcher3.ItemInfo;
  import com.android.launcher3.Launcher;
  import com.android.launcher3.LauncherSettings;
  import com.android.launcher3.OnAlarmListener;
  import com.android.launcher3.PagedView;
  import com.android.launcher3.R;
  import com.android.launcher3.ShortcutAndWidgetContainer;
  import com.android.launcher3.Workspace;
  import com.android.launcher3.Workspace.ItemOperator;
  import com.android.launcher3.WorkspaceItemInfo;
  import com.android.launcher3.accessibility.AccessibleDragListenerAdapter;
  import com.android.launcher3.config.FeatureFlags;
  import com.android.launcher3.dragndrop.DragController;
  import com.android.launcher3.dragndrop.DragController.DragListener;
  import com.android.launcher3.dragndrop.DragLayer;
  import com.android.launcher3.dragndrop.DragOptions;
  import com.android.launcher3.logging.LoggerUtils;
  import com.android.launcher3.pageindicators.PageIndicatorDots;
  import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Direction;
  import com.android.launcher3.userevent.nano.LauncherLogProto.Action.Touch;
  import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
  import com.android.launcher3.userevent.nano.LauncherLogProto.ItemType;
  import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
  import com.android.launcher3.util.Thunk;
  import com.android.launcher3.views.ClipPathView;
  import com.android.launcher3.widget.PendingAddShortcutInfo;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.List;
  
  /**
   * Represents a set of icons chosen by the user or generated by the system.
   */
  public class Folder extends AbstractFloatingView implements ClipPathView, DragSource,
          View.OnLongClickListener, DropTarget, FolderListener, TextView.OnEditorActionListener,
          View.OnFocusChangeListener, DragListener, ExtendedEditText.OnBackKeyListener {
      private static final String TAG = "Launcher.Folder";
  
      /**
       * We avoid measuring {@link #mContent} with a 0 width or height, as this
       * results in CellLayout being measured as UNSPECIFIED, which it does not support.
       */
      private static final int MIN_CONTENT_DIMEN = 5;
  
      static final int STATE_NONE = -1;
      static final int STATE_SMALL = 0;
      static final int STATE_ANIMATING = 1;
      static final int STATE_OPEN = 2;
  
      /**
       * Time for which the scroll hint is shown before automatically changing page.
       */
      public static final int SCROLL_HINT_DURATION = 500;
      public static final int RESCROLL_DELAY = PagedView.PAGE_SNAP_ANIMATION_DURATION + 150;
  
      public static final int SCROLL_NONE = -1;
      public static final int SCROLL_LEFT = 0;
      public static final int SCROLL_RIGHT = 1;
  
      /**
       * Fraction of icon width which behave as scroll region.
       */
      private static final float ICON_OVERSCROLL_WIDTH_FACTOR = 0.45f;
  
      private static final int FOLDER_NAME_ANIMATION_DURATION = 633;
  
      private static final int REORDER_DELAY = 250;
      private static final int ON_EXIT_CLOSE_DELAY = 400;
      private static final Rect sTempRect = new Rect();
      private static final int MIN_FOLDERS_FOR_HARDWARE_OPTIMIZATION = 10;
  
      private final Alarm mReorderAlarm = new Alarm();
      private final Alarm mOnExitAlarm = new Alarm();
      private final Alarm mOnScrollHintAlarm = new Alarm();
      @Thunk final Alarm mScrollPauseAlarm = new Alarm();
  
      @Thunk final ArrayList<View> mItemsInReadingOrder = new ArrayList<View>();
  
      private AnimatorSet mCurrentAnimator;
  
      protected final Launcher mLauncher;
      protected DragController mDragController;
      public FolderInfo mInfo;
  
      @Thunk FolderIcon mFolderIcon;
  
      @Thunk FolderPagedView mContent;
      public ExtendedEditText mFolderName;
      private PageIndicatorDots mPageIndicator;
  
      protected View mFooter;
      private int mFooterHeight;
  
      // Cell ranks used for drag and drop
      @Thunk int mTargetRank, mPrevTargetRank, mEmptyCellRank;
  
      private Path mClipPath;
  
      @ViewDebug.ExportedProperty(category = "launcher",
              mapping = {
                      @ViewDebug.IntToString(from = STATE_NONE, to = "STATE_NONE"),
                      @ViewDebug.IntToString(from = STATE_SMALL, to = "STATE_SMALL"),
                      @ViewDebug.IntToString(from = STATE_ANIMATING, to = "STATE_ANIMATING"),
                      @ViewDebug.IntToString(from = STATE_OPEN, to = "STATE_OPEN"),
              })
      @Thunk int mState = STATE_NONE;
      @ViewDebug.ExportedProperty(category = "launcher")
      private boolean mRearrangeOnClose = false;
      boolean mItemsInvalidated = false;
      private View mCurrentDragView;
      private boolean mIsExternalDrag;
      private boolean mDragInProgress = false;
      private boolean mDeleteFolderOnDropCompleted = false;
      private boolean mSuppressFolderDeletion = false;
      private boolean mItemAddedBackToSelfViaIcon = false;
      private boolean mIsEditingName = false;
  
      @ViewDebug.ExportedProperty(category = "launcher")
      private boolean mDestroyed;
  
      // Folder scrolling
      private int mScrollAreaOffset;
  
      @Thunk int mScrollHintDir = SCROLL_NONE;
      @Thunk int mCurrentScrollDir = SCROLL_NONE;
  
      /**
       * Used to inflate the Workspace from XML.
       *
       * @param context The application's context.
       * @param attrs The attributes set containing the Workspace's customization values.
       */
      public Folder(Context context, AttributeSet attrs) {
          super(context, attrs);
          setAlwaysDrawnWithCacheEnabled(false);
  
          mLauncher = Launcher.getLauncher(context);
          // We need this view to be focusable in touch mode so that when text editing of the folder
          // name is complete, we have something to focus on, thus hiding the cursor and giving
          // reliable behavior when clicking the text field (since it will always gain focus on click).
          setFocusableInTouchMode(true);
      }
  
      @Override
      protected void onFinishInflate() {
          super.onFinishInflate();
          mContent = findViewById(R.id.folder_content);
          mContent.setFolder(this);
  
          mPageIndicator = findViewById(R.id.folder_page_indicator);
          mFolderName = findViewById(R.id.folder_name);
          mFolderName.setOnBackKeyListener(this);
          mFolderName.setOnFocusChangeListener(this);
          mFolderName.setOnEditorActionListener(this);
          mFolderName.setSelectAllOnFocus(true);
          mFolderName.setInputType(mFolderName.getInputType()
                  & ~InputType.TYPE_TEXT_FLAG_AUTO_CORRECT
                  & ~InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS
                  | InputType.TYPE_TEXT_FLAG_CAP_WORDS);
          mFolderName.forceDisableSuggestions(true);
  
          mFooter = findViewById(R.id.folder_footer);
  
          // We find out how tall footer wants to be (it is set to wrap_content), so that
          // we can allocate the appropriate amount of space for it.
          int measureSpec = MeasureSpec.UNSPECIFIED;
          mFooter.measure(measureSpec, measureSpec);
          mFooterHeight = mFooter.getMeasuredHeight();
      }
  
      public boolean onLongClick(View v) {
          // Return if global dragging is not enabled
          if (!mLauncher.isDraggingEnabled()) return true;
          return startDrag(v, new DragOptions());
      }
  
      public boolean startDrag(View v, DragOptions options) {
          Object tag = v.getTag();
          if (tag instanceof WorkspaceItemInfo) {
              WorkspaceItemInfo item = (WorkspaceItemInfo) tag;
  
              mEmptyCellRank = item.rank;
              mCurrentDragView = v;
  
              mDragController.addDragListener(this);
              if (options.isAccessibleDrag) {
                  mDragController.addDragListener(new AccessibleDragListenerAdapter(
                          mContent, CellLayout.FOLDER_ACCESSIBILITY_DRAG) {
  
                      @Override
                      protected void enableAccessibleDrag(boolean enable) {
                          super.enableAccessibleDrag(enable);
                          mFooter.setImportantForAccessibility(enable
                                  ? IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
                                  : IMPORTANT_FOR_ACCESSIBILITY_AUTO);
                      }
                  });
              }
  
              mLauncher.getWorkspace().beginDragShared(v, this, options);
          }
          return true;
      }
  
      @Override
      public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) {
          if (dragObject.dragSource != this) {
              return;
          }
  
          mContent.removeItem(mCurrentDragView);
          if (dragObject.dragInfo instanceof WorkspaceItemInfo) {
              mItemsInvalidated = true;
  
              // We do not want to get events for the item being removed, as they will get handled
              // when the drop completes
              try (SuppressInfoChanges s = new SuppressInfoChanges()) {
                  mInfo.remove((WorkspaceItemInfo) dragObject.dragInfo, true);
              }
          }
          mDragInProgress = true;
          mItemAddedBackToSelfViaIcon = false;
      }
  
      @Override
      public void onDragEnd() {
          if (mIsExternalDrag && mDragInProgress) {
              completeDragExit();
          }
          mDragInProgress = false;
          mDragController.removeDragListener(this);
      }
  
      public boolean isEditingName() {
          return mIsEditingName;
      }
  
      public void startEditingFolderName() {
          post(new Runnable() {
              @Override
              public void run() {
                  mFolderName.setHint("");
                  mIsEditingName = true;
              }
          });
      }
  
  
      @Override
      public boolean onBackKey() {
          // Convert to a string here to ensure that no other state associated with the text field
          // gets saved.
          String newTitle = mFolderName.getText().toString();
          mInfo.title = newTitle;
          mFolderIcon.onTitleChanged(newTitle);
          mLauncher.getModelWriter().updateItemInDatabase(mInfo);
  
          if (TextUtils.isEmpty(mInfo.title)) {
              mFolderName.setHint(R.string.folder_hint_text);
          } else {
              mFolderName.setHint(null);
          }
  
          sendCustomAccessibilityEvent(
                  this, AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED,
                  getContext().getString(R.string.folder_renamed, newTitle));
  
          // This ensures that focus is gained every time the field is clicked, which selects all
          // the text and brings up the soft keyboard if necessary.
          mFolderName.clearFocus();
  
          Selection.setSelection(mFolderName.getText(), 0, 0);
          mIsEditingName = false;
          return true;
      }
  
      public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
          if (actionId == EditorInfo.IME_ACTION_DONE) {
              mFolderName.dispatchBackKey();
              return true;
          }
          return false;
      }
  
      public FolderIcon getFolderIcon() {
          return mFolderIcon;
      }
  
      public void setDragController(DragController dragController) {
          mDragController = dragController;
      }
  
      public void setFolderIcon(FolderIcon icon) {
          mFolderIcon = icon;
      }
  
      @Override
      protected void onAttachedToWindow() {
          // requestFocus() causes the focus onto the folder itself, which doesn't cause visual
          // effect but the next arrow key can start the keyboard focus inside of the folder, not
          // the folder itself.
          requestFocus();
          super.onAttachedToWindow();
      }
  
      @Override
      public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) {
          // When the folder gets focus, we don't want to announce the list of items.
          return true;
      }
  
      @Override
      public View focusSearch(int direction) {
          // When the folder is focused, further focus search should be within the folder contents.
          return FocusFinder.getInstance().findNextFocus(this, null, direction);
      }
  
      /**
       * @return the FolderInfo object associated with this folder
       */
      public FolderInfo getInfo() {
          return mInfo;
      }
  
      void bind(FolderInfo info) {
          mInfo = info;
          ArrayList<WorkspaceItemInfo> children = info.contents;
          Collections.sort(children, ITEM_POS_COMPARATOR);
          updateItemLocationsInDatabaseBatch();
  
          DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
          if (lp == null) {
              lp = new DragLayer.LayoutParams(0, 0);
              lp.customPosition = true;
              setLayoutParams(lp);
          }
          mItemsInvalidated = true;
          mInfo.addListener(this);
  
          if (!TextUtils.isEmpty(mInfo.title)) {
              mFolderName.setText(mInfo.title);
              mFolderName.setHint(null);
          } else {
              mFolderName.setText("");
              mFolderName.setHint(R.string.folder_hint_text);
          }
          // In case any children didn't come across during loading, clean up the folder accordingly
          mFolderIcon.post(() -> {
              if (getItemCount() <= 1) {
                  replaceFolderWithFinalItem();
              }
          });
      }
  
  
      /**
       * Show suggested folder title.
       */
      public void showSuggestedTitle(CharSequence suggestName) {
          if (FeatureFlags.FOLDER_NAME_SUGGEST.get() && mInfo.contents.size() == 2) {
              if (!TextUtils.isEmpty(suggestName)) {
                  mFolderName.setHint(suggestName);
                  mFolderName.setText(suggestName);
                  mFolderName.showKeyboard();
                  mInfo.title = suggestName;
              }
              animateOpen();
          }
      }
  
      /**
       * Creates a new UserFolder, inflated from R.layout.user_folder.
       *
       * @param launcher The main activity.
       *
       * @return A new UserFolder.
       */
      @SuppressLint("InflateParams")
      static Folder fromXml(Launcher launcher) {
          return (Folder) launcher.getLayoutInflater()
                  .inflate(R.layout.user_folder_icon_normalized, null);
      }
  
      private void startAnimation(final AnimatorSet a) {
          if (mCurrentAnimator != null && mCurrentAnimator.isRunning()) {
              mCurrentAnimator.cancel();
          }
          final Workspace workspace = mLauncher.getWorkspace();
          final CellLayout currentCellLayout =
                  (CellLayout) workspace.getChildAt(workspace.getCurrentPage());
          final boolean useHardware = shouldUseHardwareLayerForAnimation(currentCellLayout);
          final boolean wasHardwareAccelerated = currentCellLayout.isHardwareLayerEnabled();
  
          a.addListener(new AnimatorListenerAdapter() {
              @Override
              public void onAnimationStart(Animator animation) {
                  if (useHardware) {
                      currentCellLayout.enableHardwareLayer(true);
                  }
                  mState = STATE_ANIMATING;
                  mCurrentAnimator = a;
              }
  
              @Override
              public void onAnimationEnd(Animator animation) {
                  if (useHardware) {
                      currentCellLayout.enableHardwareLayer(wasHardwareAccelerated);
                  }
                  mCurrentAnimator = null;
              }
          });
          a.start();
      }
  
      private boolean shouldUseHardwareLayerForAnimation(CellLayout currentCellLayout) {
          int folderCount = 0;
          final ShortcutAndWidgetContainer container = currentCellLayout.getShortcutsAndWidgets();
          for (int i = container.getChildCount() - 1; i >= 0; --i) {
              final View child = container.getChildAt(i);
              if (child instanceof AppWidgetHostView) return false;
              if (child instanceof FolderIcon) ++folderCount;
          }
          return folderCount >= MIN_FOLDERS_FOR_HARDWARE_OPTIMIZATION;
      }
  
      /**
       * Opens the folder as part of a drag operation
       */
      public void beginExternalDrag() {
          mIsExternalDrag = true;
          mDragInProgress = true;
  
          // Since this folder opened by another controller, it might not get onDrop or
          // onDropComplete. Perform cleanup once drag-n-drop ends.
          mDragController.addDragListener(this);
  
          ArrayList<WorkspaceItemInfo> items = new ArrayList<>(mInfo.contents);
          mEmptyCellRank = items.size();
          items.add(null);    // Add an empty spot at the end
  
          animateOpen(items, mEmptyCellRank / mContent.itemsPerPage());
      }
  
      /**
       * Opens the user folder described by the specified tag. The opening of the folder
       * is animated relative to the specified View. If the View is null, no animation
       * is played.
       */
      public void animateOpen() {
          animateOpen(mInfo.contents, 0);
      }
  
      /**
       * Opens the user folder described by the specified tag. The opening of the folder
       * is animated relative to the specified View. If the View is null, no animation
       * is played.
       */
      private void animateOpen(List<WorkspaceItemInfo> items, int pageNo) {
          Folder openFolder = getOpen(mLauncher);
          if (openFolder != null && openFolder != this) {
              // Close any open folder before opening a folder.
              openFolder.close(true);
          }
  
          mContent.bindItems(items);
          centerAboutIcon();
          mItemsInvalidated = true;
          updateTextViewFocus();
  
          mIsOpen = true;
  
          DragLayer dragLayer = mLauncher.getDragLayer();
          // Just verify that the folder hasn't already been added to the DragLayer.
          // There was a one-off crash where the folder had a parent already.
          if (getParent() == null) {
              dragLayer.addView(this);
              mDragController.addDropTarget(this);
          } else {
              if (FeatureFlags.IS_DOGFOOD_BUILD) {
                  Log.e(TAG, "Opening folder (" + this + ") which already has a parent:"
                          + getParent());
              }
          }
  
          mContent.completePendingPageChanges();
          mContent.snapToPageImmediately(pageNo);
  
          // This is set to true in close(), but isn't reset to false until onDropCompleted(). This
          // leads to an inconsistent state if you drag out of the folder and drag back in without
          // dropping. One resulting issue is that replaceFolderWithFinalItem() can be called twice.
          mDeleteFolderOnDropCompleted = false;
  
          AnimatorSet anim = new FolderAnimationManager(this, true /* isOpening */).getAnimator();
          anim.addListener(new AnimatorListenerAdapter() {
              @Override
              public void onAnimationStart(Animator animation) {
                  mFolderIcon.setIconVisible(false);
                  mFolderIcon.drawLeaveBehindIfExists();
              }
              @Override
              public void onAnimationEnd(Animator animation) {
                  mState = STATE_OPEN;
                  announceAccessibilityChanges();
  
                  mLauncher.getUserEventDispatcher().logActionOnItem(
                          Touch.TAP,
                          Direction.NONE,
                          ItemType.FOLDER_ICON, mInfo.cellX, mInfo.cellY);
  
                  mContent.setFocusOnFirstChild();
              }
          });
  
          // Footer animation
          if (mContent.getPageCount() > 1 && !mInfo.hasOption(FolderInfo.FLAG_MULTI_PAGE_ANIMATION)) {
              int footerWidth = mContent.getDesiredWidth()
                      - mFooter.getPaddingLeft() - mFooter.getPaddingRight();
  
              float textWidth =  mFolderName.getPaint().measureText(mFolderName.getText().toString());
              float translation = (footerWidth - textWidth) / 2;
              mFolderName.setTranslationX(mContent.mIsRtl ? -translation : translation);
              mPageIndicator.prepareEntryAnimation();
  
              // Do not update the flag if we are in drag mode. The flag will be updated, when we
              // actually drop the icon.
              final boolean updateAnimationFlag = !mDragInProgress;
              anim.addListener(new AnimatorListenerAdapter() {
  
                  @SuppressLint("InlinedApi")
                  @Override
                  public void onAnimationEnd(Animator animation) {
                      mFolderName.animate().setDuration(FOLDER_NAME_ANIMATION_DURATION)
                          .translationX(0)
                          .setInterpolator(AnimationUtils.loadInterpolator(
                                  mLauncher, android.R.interpolator.fast_out_slow_in));
                      mPageIndicator.playEntryAnimation();
  
                      if (updateAnimationFlag) {
                          mInfo.setOption(FolderInfo.FLAG_MULTI_PAGE_ANIMATION, true,
                                  mLauncher.getModelWriter());
                      }
                  }
              });
          } else {
              mFolderName.setTranslationX(0);
          }
  
          mPageIndicator.stopAllAnimations();
          startAnimation(anim);
  
          // Make sure the folder picks up the last drag move even if the finger doesn't move.
          if (mDragController.isDragging()) {
              mDragController.forceTouchMove();
          }
          mContent.verifyVisibleHighResIcons(mContent.getNextPage());
      }
  
      @Override
      protected boolean isOfType(int type) {
          return (type & TYPE_FOLDER) != 0;
      }
  
      @Override
      protected void handleClose(boolean animate) {
          mIsOpen = false;
  
          if (!animate && mCurrentAnimator != null && mCurrentAnimator.isRunning()) {
              mCurrentAnimator.cancel();
          }
  
          if (isEditingName()) {
              mFolderName.dispatchBackKey();
          }
  
          if (mFolderIcon != null) {
              mFolderIcon.clearLeaveBehindIfExists();
          }
  
          if (animate) {
              animateClosed();
          } else {
              closeComplete(false);
              post(this::announceAccessibilityChanges);
          }
  
          // Notify the accessibility manager that this folder "window" has disappeared and no
          // longer occludes the workspace items
          mLauncher.getDragLayer().sendAccessibilityEvent(
                  AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
      }
  
      private void animateClosed() {
          AnimatorSet a = new FolderAnimationManager(this, false /* isOpening */).getAnimator();
          a.addListener(new AnimatorListenerAdapter() {
              @Override
              public void onAnimationEnd(Animator animation) {
                  closeComplete(true);
                  announceAccessibilityChanges();
              }
          });
          startAnimation(a);
      }
  
      @Override
      protected Pair<View, String> getAccessibilityTarget() {
          return Pair.create(mContent, mIsOpen ? mContent.getAccessibilityDescription()
                  : getContext().getString(R.string.folder_closed));
      }
  
      private void closeComplete(boolean wasAnimated) {
          // TODO: Clear all active animations.
          DragLayer parent = (DragLayer) getParent();
          if (parent != null) {
              parent.removeView(this);
          }
          mDragController.removeDropTarget(this);
          clearFocus();
          if (mFolderIcon != null) {
              mFolderIcon.setVisibility(View.VISIBLE);
              mFolderIcon.setIconVisible(true);
              mFolderIcon.mFolderName.setTextVisibility(true);
              if (wasAnimated) {
                  mFolderIcon.animateBgShadowAndStroke();
                  mFolderIcon.onFolderClose(mContent.getCurrentPage());
                  if (mFolderIcon.hasDot()) {
                      mFolderIcon.animateDotScale(0f, 1f);
                  }
                  mFolderIcon.requestFocus();
              }
          }
  
          if (mRearrangeOnClose) {
              rearrangeChildren();
              mRearrangeOnClose = false;
          }
          if (getItemCount() <= 1) {
              if (!mDragInProgress && !mSuppressFolderDeletion) {
                  replaceFolderWithFinalItem();
              } else if (mDragInProgress) {
                  mDeleteFolderOnDropCompleted = true;
              }
          } else if (!mDragInProgress) {
              mContent.unbindItems();
          }
          mSuppressFolderDeletion = false;
          clearDragInfo();
          mState = STATE_SMALL;
          mContent.setCurrentPage(0);
      }
  
      @Override
      public boolean acceptDrop(DragObject d) {
          final ItemInfo item = d.dragInfo;
          final int itemType = item.itemType;
          return ((itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION ||
                  itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT ||
                  itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT));
      }
  
      public void onDragEnter(DragObject d) {
          mPrevTargetRank = -1;
          mOnExitAlarm.cancelAlarm();
          // Get the area offset such that the folder only closes if half the drag icon width
          // is outside the folder area
          mScrollAreaOffset = d.dragView.getDragRegionWidth() / 2 - d.xOffset;
      }
  
      OnAlarmListener mReorderAlarmListener = new OnAlarmListener() {
          public void onAlarm(Alarm alarm) {
              mContent.realTimeReorder(mEmptyCellRank, mTargetRank);
              mEmptyCellRank = mTargetRank;
          }
      };
  
      public boolean isLayoutRtl() {
          return (getLayoutDirection() == LAYOUT_DIRECTION_RTL);
      }
  
      private int getTargetRank(DragObject d, float[] recycle) {
          recycle = d.getVisualCenter(recycle);
          return mContent.findNearestArea(
                  (int) recycle[0] - getPaddingLeft(), (int) recycle[1] - getPaddingTop());
      }
  
      @Override
      public void onDragOver(DragObject d) {
          if (mScrollPauseAlarm.alarmPending()) {
              return;
          }
          final float[] r = new float[2];
          mTargetRank = getTargetRank(d, r);
  
          if (mTargetRank != mPrevTargetRank) {
              mReorderAlarm.cancelAlarm();
              mReorderAlarm.setOnAlarmListener(mReorderAlarmListener);
              mReorderAlarm.setAlarm(REORDER_DELAY);
              mPrevTargetRank = mTargetRank;
  
              if (d.stateAnnouncer != null) {
                  d.stateAnnouncer.announce(getContext().getString(R.string.move_to_position,
                          mTargetRank + 1));
              }
          }
  
          float x = r[0];
          int currentPage = mContent.getNextPage();
  
          float cellOverlap = mContent.getCurrentCellLayout().getCellWidth()
                  * ICON_OVERSCROLL_WIDTH_FACTOR;
          boolean isOutsideLeftEdge = x < cellOverlap;
          boolean isOutsideRightEdge = x > (getWidth() - cellOverlap);
  
          if (currentPage > 0 && (mContent.mIsRtl ? isOutsideRightEdge : isOutsideLeftEdge)) {
              showScrollHint(SCROLL_LEFT, d);
          } else if (currentPage < (mContent.getPageCount() - 1)
                  && (mContent.mIsRtl ? isOutsideLeftEdge : isOutsideRightEdge)) {
              showScrollHint(SCROLL_RIGHT, d);
          } else {
              mOnScrollHintAlarm.cancelAlarm();
              if (mScrollHintDir != SCROLL_NONE) {
                  mContent.clearScrollHint();
                  mScrollHintDir = SCROLL_NONE;
              }
          }
      }
  
      private void showScrollHint(int direction, DragObject d) {
          // Show scroll hint on the right
          if (mScrollHintDir != direction) {
              mContent.showScrollHint(direction);
              mScrollHintDir = direction;
          }
  
          // Set alarm for when the hint is complete
          if (!mOnScrollHintAlarm.alarmPending() || mCurrentScrollDir != direction) {
              mCurrentScrollDir = direction;
              mOnScrollHintAlarm.cancelAlarm();
              mOnScrollHintAlarm.setOnAlarmListener(new OnScrollHintListener(d));
              mOnScrollHintAlarm.setAlarm(SCROLL_HINT_DURATION);
  
              mReorderAlarm.cancelAlarm();
              mTargetRank = mEmptyCellRank;
          }
      }
  
      OnAlarmListener mOnExitAlarmListener = new OnAlarmListener() {
          public void onAlarm(Alarm alarm) {
              completeDragExit();
          }
      };
  
      public void completeDragExit() {
          if (mIsOpen) {
              close(true);
              mRearrangeOnClose = true;
          } else if (mState == STATE_ANIMATING) {
              mRearrangeOnClose = true;
          } else {
              rearrangeChildren();
              clearDragInfo();
          }
      }
  
      private void clearDragInfo() {
          mCurrentDragView = null;
          mIsExternalDrag = false;
      }
  
      public void onDragExit(DragObject d) {
          // We only close the folder if this is a true drag exit, ie. not because
          // a drop has occurred above the folder.
          if (!d.dragComplete) {
              mOnExitAlarm.setOnAlarmListener(mOnExitAlarmListener);
              mOnExitAlarm.setAlarm(ON_EXIT_CLOSE_DELAY);
          }
          mReorderAlarm.cancelAlarm();
  
          mOnScrollHintAlarm.cancelAlarm();
          mScrollPauseAlarm.cancelAlarm();
          if (mScrollHintDir != SCROLL_NONE) {
              mContent.clearScrollHint();
              mScrollHintDir = SCROLL_NONE;
          }
      }
  
      /**
       * When performing an accessibility drop, onDrop is sent immediately after onDragEnter. So we
       * need to complete all transient states based on timers.
       */
      @Override
      public void prepareAccessibilityDrop() {
          if (mReorderAlarm.alarmPending()) {
              mReorderAlarm.cancelAlarm();
              mReorderAlarmListener.onAlarm(mReorderAlarm);
          }
      }
  
      @Override
      public void onDropCompleted(final View target, final DragObject d,
              final boolean success) {
          if (success) {
              if (mDeleteFolderOnDropCompleted && !mItemAddedBackToSelfViaIcon && target != this) {
                  replaceFolderWithFinalItem();
              }
          } else {
              // The drag failed, we need to return the item to the folder
              WorkspaceItemInfo info = (WorkspaceItemInfo) d.dragInfo;
              View icon = (mCurrentDragView != null && mCurrentDragView.getTag() == info)
                      ? mCurrentDragView : mContent.createNewView(info);
              ArrayList<View> views = getIconsInReadingOrder();
              views.add(info.rank, icon);
              mContent.arrangeChildren(views);
              mItemsInvalidated = true;
  
              try (SuppressInfoChanges s = new SuppressInfoChanges()) {
                  mFolderIcon.onDrop(d, true /* itemReturnedOnFailedDrop */);
              }
          }
  
          if (target != this) {
              if (mOnExitAlarm.alarmPending()) {
                  mOnExitAlarm.cancelAlarm();
                  if (!success) {
                      mSuppressFolderDeletion = true;
                  }
                  mScrollPauseAlarm.cancelAlarm();
                  completeDragExit();
              }
          }
  
          mDeleteFolderOnDropCompleted = false;
          mDragInProgress = false;
          mItemAddedBackToSelfViaIcon = false;
          mCurrentDragView = null;
  
          // Reordering may have occured, and we need to save the new item locations. We do this once
          // at the end to prevent unnecessary database operations.
          updateItemLocationsInDatabaseBatch();
          // Use the item count to check for multi-page as the folder UI may not have
          // been refreshed yet.
          if (getItemCount() <= mContent.itemsPerPage()) {
              // Show the animation, next time something is added to the folder.
              mInfo.setOption(FolderInfo.FLAG_MULTI_PAGE_ANIMATION, false,
                      mLauncher.getModelWriter());
          }
      }
  
      private void updateItemLocationsInDatabaseBatch() {
          FolderGridOrganizer verifier = new FolderGridOrganizer(
                  mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
  
          ArrayList<ItemInfo> items = new ArrayList<>();
          int total = mInfo.contents.size();
          for (int i = 0; i < total; i++) {
              WorkspaceItemInfo itemInfo = mInfo.contents.get(i);
              if (verifier.updateRankAndPos(itemInfo, i)) {
                  items.add(itemInfo);
              }
          }
  
          if (!items.isEmpty()) {
              mLauncher.getModelWriter().moveItemsInDatabase(items, mInfo.id, 0);
          }
      }
  
      public void notifyDrop() {
          if (mDragInProgress) {
              mItemAddedBackToSelfViaIcon = true;
          }
      }
  
      public boolean isDropEnabled() {
          return mState != STATE_ANIMATING;
      }
  
      private void centerAboutIcon() {
          DeviceProfile grid = mLauncher.getDeviceProfile();
  
          DragLayer.LayoutParams lp = (DragLayer.LayoutParams) getLayoutParams();
          DragLayer parent = mLauncher.getDragLayer();
          int width = getFolderWidth();
          int height = getFolderHeight();
  
          parent.getDescendantRectRelativeToSelf(mFolderIcon, sTempRect);
          int centerX = sTempRect.centerX();
          int centerY = sTempRect.centerY();
          int centeredLeft = centerX - width / 2;
          int centeredTop = centerY - height / 2;
  
          // We need to bound the folder to the currently visible workspace area
          if (mLauncher.getStateManager().getState().overviewUi) {
              parent.getDescendantRectRelativeToSelf(mLauncher.getOverviewPanel(), sTempRect);
          } else {
              mLauncher.getWorkspace().getPageAreaRelativeToDragLayer(sTempRect);
          }
          int left = Math.min(Math.max(sTempRect.left, centeredLeft),
                  sTempRect.right- width);
          int top = Math.min(Math.max(sTempRect.top, centeredTop),
                  sTempRect.bottom - height);
  
          int distFromEdgeOfScreen = mLauncher.getWorkspace().getPaddingLeft() + getPaddingLeft();
  
          if (grid.isPhone && (grid.availableWidthPx - width) < 4 * distFromEdgeOfScreen) {
              // Center the folder if it is very close to being centered anyway, by virtue of
              // filling the majority of the viewport. ie. remove it from the uncanny valley
              // of centeredness.
              left = (grid.availableWidthPx - width) / 2;
          } else if (width >= sTempRect.width()) {
              // If the folder doesn't fit within the bounds, center it about the desired bounds
              left = sTempRect.left + (sTempRect.width() - width) / 2;
          }
          if (height >= sTempRect.height()) {
              // Folder height is greater than page height, center on page
              top = sTempRect.top + (sTempRect.height() - height) / 2;
          } else {
              // Folder height is less than page height, so bound it to the absolute open folder
              // bounds if necessary
              Rect folderBounds = grid.getAbsoluteOpenFolderBounds();
              left = Math.max(folderBounds.left, Math.min(left, folderBounds.right - width));
              top = Math.max(folderBounds.top, Math.min(top, folderBounds.bottom - height));
          }
  
          int folderPivotX = width / 2 + (centeredLeft - left);
          int folderPivotY = height / 2 + (centeredTop - top);
          setPivotX(folderPivotX);
          setPivotY(folderPivotY);
  
          lp.width = width;
          lp.height = height;
          lp.x = left;
          lp.y = top;
      }
  
      protected int getContentAreaHeight() {
          DeviceProfile grid = mLauncher.getDeviceProfile();
          int maxContentAreaHeight = grid.availableHeightPx - grid.getTotalWorkspacePadding().y
                  - mFooterHeight;
          int height = Math.min(maxContentAreaHeight,
                  mContent.getDesiredHeight());
          return Math.max(height, MIN_CONTENT_DIMEN);
      }
  
      private int getContentAreaWidth() {
          return Math.max(mContent.getDesiredWidth(), MIN_CONTENT_DIMEN);
      }
  
      private int getFolderWidth() {
          return getPaddingLeft() + getPaddingRight() + mContent.getDesiredWidth();
      }
  
      private int getFolderHeight() {
          return getFolderHeight(getContentAreaHeight());
      }
  
      private int getFolderHeight(int contentAreaHeight) {
          return getPaddingTop() + getPaddingBottom() + contentAreaHeight + mFooterHeight;
      }
  
      protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
          int contentWidth = getContentAreaWidth();
          int contentHeight = getContentAreaHeight();
  
          int contentAreaWidthSpec = MeasureSpec.makeMeasureSpec(contentWidth, MeasureSpec.EXACTLY);
          int contentAreaHeightSpec = MeasureSpec.makeMeasureSpec(contentHeight, MeasureSpec.EXACTLY);
  
          mContent.setFixedSize(contentWidth, contentHeight);
          mContent.measure(contentAreaWidthSpec, contentAreaHeightSpec);
  
          if (mContent.getChildCount() > 0) {
              int cellIconGap = (mContent.getPageAt(0).getCellWidth()
                      - mLauncher.getDeviceProfile().iconSizePx) / 2;
              mFooter.setPadding(mContent.getPaddingLeft() + cellIconGap,
                      mFooter.getPaddingTop(),
                      mContent.getPaddingRight() + cellIconGap,
                      mFooter.getPaddingBottom());
          }
          mFooter.measure(contentAreaWidthSpec,
                  MeasureSpec.makeMeasureSpec(mFooterHeight, MeasureSpec.EXACTLY));
  
          int folderWidth = getPaddingLeft() + getPaddingRight() + contentWidth;
          int folderHeight = getFolderHeight(contentHeight);
          setMeasuredDimension(folderWidth, folderHeight);
      }
  
      /**
       * Rearranges the children based on their rank.
       */
      public void rearrangeChildren() {
          mContent.arrangeChildren(getIconsInReadingOrder());
          mItemsInvalidated = true;
      }
  
      public int getItemCount() {
          return mInfo.contents.size();
      }
  
      @Thunk void replaceFolderWithFinalItem() {
          // Add the last remaining child to the workspace in place of the folder
          Runnable onCompleteRunnable = new Runnable() {
              @Override
              public void run() {
                  int itemCount = getItemCount();
                  if (itemCount <= 1) {
                      View newIcon = null;
  
                      if (itemCount == 1) {
                          // Move the item from the folder to the workspace, in the position of the
                          // folder
                          CellLayout cellLayout = mLauncher.getCellLayout(mInfo.container,
                                  mInfo.screenId);
                          WorkspaceItemInfo finalItem = mInfo.contents.remove(0);
                          newIcon = mLauncher.createShortcut(cellLayout, finalItem);
                          mLauncher.getModelWriter().addOrMoveItemInDatabase(finalItem,
                                  mInfo.container, mInfo.screenId, mInfo.cellX, mInfo.cellY);
                      }
  
                      // Remove the folder
                      mLauncher.removeItem(mFolderIcon, mInfo, true /* deleteFromDb */);
                      if (mFolderIcon instanceof DropTarget) {
                          mDragController.removeDropTarget((DropTarget) mFolderIcon);
                      }
  
                      if (newIcon != null) {
                          // We add the child after removing the folder to prevent both from existing
                          // at the same time in the CellLayout.  We need to add the new item with
                          // addInScreenFromBind() to ensure that hotseat items are placed correctly.
                          mLauncher.getWorkspace().addInScreenFromBind(newIcon, mInfo);
  
                          // Focus the newly created child
                          newIcon.requestFocus();
                      }
                  }
              }
          };
          View finalChild = mContent.getLastItem();
          if (finalChild != null) {
              mFolderIcon.performDestroyAnimation(onCompleteRunnable);
          } else {
              onCompleteRunnable.run();
          }
          mDestroyed = true;
      }
  
      public boolean isDestroyed() {
          return mDestroyed;
      }
  
      // This method keeps track of the first and last item in the folder for the purposes
      // of keyboard focus
      public void updateTextViewFocus() {
          final View firstChild = mContent.getFirstItem();
          final View lastChild = mContent.getLastItem();
          if (firstChild != null && lastChild != null) {
              mFolderName.setNextFocusDownId(lastChild.getId());
              mFolderName.setNextFocusRightId(lastChild.getId());
              mFolderName.setNextFocusLeftId(lastChild.getId());
              mFolderName.setNextFocusUpId(lastChild.getId());
              // Hitting TAB from the folder name wraps around to the first item on the current
              // folder page, and hitting SHIFT+TAB from that item wraps back to the folder name.
              mFolderName.setNextFocusForwardId(firstChild.getId());
              // When clicking off the folder when editing the name, this Folder gains focus. When
              // pressing an arrow key from that state, give the focus to the first item.
              this.setNextFocusDownId(firstChild.getId());
              this.setNextFocusRightId(firstChild.getId());
              this.setNextFocusLeftId(firstChild.getId());
              this.setNextFocusUpId(firstChild.getId());
              // When pressing shift+tab in the above state, give the focus to the last item.
              setOnKeyListener(new OnKeyListener() {
                  @Override
                  public boolean onKey(View v, int keyCode, KeyEvent event) {
                      boolean isShiftPlusTab = keyCode == KeyEvent.KEYCODE_TAB &&
                              event.hasModifiers(KeyEvent.META_SHIFT_ON);
                      if (isShiftPlusTab && Folder.this.isFocused()) {
                          return lastChild.requestFocus();
                      }
                      return false;
                  }
              });
          } else {
              setOnKeyListener(null);
          }
      }
  
      @Override
      public void onDrop(DragObject d, DragOptions options) {
          // If the icon was dropped while the page was being scrolled, we need to compute
          // the target location again such that the icon is placed of the final page.
          if (!mContent.rankOnCurrentPage(mEmptyCellRank)) {
              // Reorder again.
              mTargetRank = getTargetRank(d, null);
  
              // Rearrange items immediately.
              mReorderAlarmListener.onAlarm(mReorderAlarm);
  
              mOnScrollHintAlarm.cancelAlarm();
              mScrollPauseAlarm.cancelAlarm();
          }
          mContent.completePendingPageChanges();
  
          PendingAddShortcutInfo pasi = d.dragInfo instanceof PendingAddShortcutInfo
                  ? (PendingAddShortcutInfo) d.dragInfo : null;
          WorkspaceItemInfo pasiSi = pasi != null ? pasi.activityInfo.createWorkspaceItemInfo() : null;
          if (pasi != null && pasiSi == null) {
              // There is no WorkspaceItemInfo, so we have to go through a configuration activity.
              pasi.container = mInfo.id;
              pasi.rank = mEmptyCellRank;
  
              mLauncher.addPendingItem(pasi, pasi.container, pasi.screenId, null, pasi.spanX,
                      pasi.spanY);
              d.deferDragViewCleanupPostAnimation = false;
              mRearrangeOnClose = true;
          } else {
              final WorkspaceItemInfo si;
              if (pasiSi != null) {
                  si = pasiSi;
              } else if (d.dragInfo instanceof AppInfo) {
                  // Came from all apps -- make a copy.
                  si = ((AppInfo) d.dragInfo).makeWorkspaceItem();
              } else {
                  // WorkspaceItemInfo
                  si = (WorkspaceItemInfo) d.dragInfo;
              }
  
              View currentDragView;
              if (mIsExternalDrag) {
                  currentDragView = mContent.createAndAddViewForRank(si, mEmptyCellRank);
  
                  // Actually move the item in the database if it was an external drag. Call this
                  // before creating the view, so that WorkspaceItemInfo is updated appropriately.
                  mLauncher.getModelWriter().addOrMoveItemInDatabase(
                          si, mInfo.id, 0, si.cellX, si.cellY);
                  mIsExternalDrag = false;
              } else {
                  currentDragView = mCurrentDragView;
                  mContent.addViewForRank(currentDragView, si, mEmptyCellRank);
              }
  
              if (d.dragView.hasDrawn()) {
                  // Temporarily reset the scale such that the animation target gets calculated
                  // correctly.
                  float scaleX = getScaleX();
                  float scaleY = getScaleY();
                  setScaleX(1.0f);
                  setScaleY(1.0f);
                  mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, currentDragView, null);
                  setScaleX(scaleX);
                  setScaleY(scaleY);
              } else {
                  d.deferDragViewCleanupPostAnimation = false;
                  currentDragView.setVisibility(VISIBLE);
              }
  
              mItemsInvalidated = true;
              rearrangeChildren();
  
              // Temporarily suppress the listener, as we did all the work already here.
              try (SuppressInfoChanges s = new SuppressInfoChanges()) {
                  mInfo.add(si, mEmptyCellRank, false);
              }
  
              // We only need to update the locations if it doesn't get handled in
              // #onDropCompleted.
              if (d.dragSource != this) {
                  updateItemLocationsInDatabaseBatch();
              }
          }
  
          // Clear the drag info, as it is no longer being dragged.
          mDragInProgress = false;
  
          if (mContent.getPageCount() > 1) {
              // The animation has already been shown while opening the folder.
              mInfo.setOption(FolderInfo.FLAG_MULTI_PAGE_ANIMATION, true, mLauncher.getModelWriter());
          }
  
          mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY);
          if (d.stateAnnouncer != null) {
              d.stateAnnouncer.completeAction(R.string.item_moved);
          }
      }
  
      // This is used so the item doesn't immediately appear in the folder when added. In one case
      // we need to create the illusion that the item isn't added back to the folder yet, to
      // to correspond to the animation of the icon back into the folder. This is
      public void hideItem(WorkspaceItemInfo info) {
          View v = getViewForInfo(info);
          if (v != null) {
              v.setVisibility(INVISIBLE);
          }
      }
      public void showItem(WorkspaceItemInfo info) {
          View v = getViewForInfo(info);
          if (v != null) {
              v.setVisibility(VISIBLE);
          }
      }
  
      @Override
      public void onAdd(WorkspaceItemInfo item, int rank) {
          FolderGridOrganizer verifier = new FolderGridOrganizer(
                  mLauncher.getDeviceProfile().inv).setFolderInfo(mInfo);
          verifier.updateRankAndPos(item, rank);
          mLauncher.getModelWriter().addOrMoveItemInDatabase(item, mInfo.id, 0, item.cellX,
                  item.cellY);
          updateItemLocationsInDatabaseBatch();
  
          if (mContent.areViewsBound()) {
              mContent.createAndAddViewForRank(item, rank);
          }
          mItemsInvalidated = true;
      }
  
      public void onRemove(WorkspaceItemInfo item) {
          mItemsInvalidated = true;
          View v = getViewForInfo(item);
          mContent.removeItem(v);
          if (mState == STATE_ANIMATING) {
              mRearrangeOnClose = true;
          } else {
              rearrangeChildren();
          }
          if (getItemCount() <= 1) {
              if (mIsOpen) {
                  close(true);
              } else {
                  replaceFolderWithFinalItem();
              }
          }
      }
  
      private View getViewForInfo(final WorkspaceItemInfo item) {
          return mContent.iterateOverItems((info, view) -> info == item);
      }
  
      @Override
      public void onItemsChanged(boolean animate) {
          updateTextViewFocus();
      }
  
      /**
       * Utility methods to iterate over items of the view
       */
      public void iterateOverItems(ItemOperator op) {
          mContent.iterateOverItems(op);
      }
  
      /**
       * Returns the sorted list of all the icons in the folder
       */
      public ArrayList<View> getIconsInReadingOrder() {
          if (mItemsInvalidated) {
              mItemsInReadingOrder.clear();
              mContent.iterateOverItems((i, v) -> !mItemsInReadingOrder.add(v));
              mItemsInvalidated = false;
          }
          return mItemsInReadingOrder;
      }
  
      public List<BubbleTextView> getItemsOnPage(int page) {
          ArrayList<View> allItems = getIconsInReadingOrder();
          int lastPage = mContent.getPageCount() - 1;
          int totalItemsInFolder = allItems.size();
          int itemsPerPage = mContent.itemsPerPage();
          int numItemsOnCurrentPage = page == lastPage
                  ? totalItemsInFolder - (itemsPerPage * page)
                  : itemsPerPage;
  
          int startIndex = page * itemsPerPage;
          int endIndex = Math.min(startIndex + numItemsOnCurrentPage, allItems.size());
  
          List<BubbleTextView> itemsOnCurrentPage = new ArrayList<>(numItemsOnCurrentPage);
          for (int i = startIndex; i < endIndex; ++i) {
              itemsOnCurrentPage.add((BubbleTextView) allItems.get(i));
          }
          return itemsOnCurrentPage;
      }
  
      public void onFocusChange(View v, boolean hasFocus) {
          if (v == mFolderName) {
              if (hasFocus) {
                  startEditingFolderName();
              } else {
                  mFolderName.dispatchBackKey();
              }
          }
      }
  
      @Override
      public void getHitRectRelativeToDragLayer(Rect outRect) {
          getHitRect(outRect);
          outRect.left -= mScrollAreaOffset;
          outRect.right += mScrollAreaOffset;
      }
  
      @Override
      public void fillInLogContainerData(View v, ItemInfo info, Target target, Target targetParent) {
          target.gridX = info.cellX;
          target.gridY = info.cellY;
          target.pageIndex = mContent.getCurrentPage();
          targetParent.containerType = ContainerType.FOLDER;
      }
  
      private class OnScrollHintListener implements OnAlarmListener {
  
          private final DragObject mDragObject;
  
          OnScrollHintListener(DragObject object) {
              mDragObject = object;
          }
  
          /**
           * Scroll hint has been shown long enough. Now scroll to appropriate page.
           */
          @Override
          public void onAlarm(Alarm alarm) {
              if (mCurrentScrollDir == SCROLL_LEFT) {
                  mContent.scrollLeft();
                  mScrollHintDir = SCROLL_NONE;
              } else if (mCurrentScrollDir == SCROLL_RIGHT) {
                  mContent.scrollRight();
                  mScrollHintDir = SCROLL_NONE;
              } else {
                  // This should not happen
                  return;
              }
              mCurrentScrollDir = SCROLL_NONE;
  
              // Pause drag event until the scrolling is finished
              mScrollPauseAlarm.setOnAlarmListener(new OnScrollFinishedListener(mDragObject));
              mScrollPauseAlarm.setAlarm(RESCROLL_DELAY);
          }
      }
  
      private class OnScrollFinishedListener implements OnAlarmListener {
  
          private final DragObject mDragObject;
  
          OnScrollFinishedListener(DragObject object) {
              mDragObject = object;
          }
  
          /**
           * Page scroll is complete.
           */
          @Override
          public void onAlarm(Alarm alarm) {
              // Reorder immediately on page change.
              onDragOver(mDragObject);
          }
      }
  
      // Compares item position based on rank and position giving priority to the rank.
      public static final Comparator<ItemInfo> ITEM_POS_COMPARATOR = new Comparator<ItemInfo>() {
  
          @Override
          public int compare(ItemInfo lhs, ItemInfo rhs) {
              if (lhs.rank != rhs.rank) {
                  return lhs.rank - rhs.rank;
              } else if (lhs.cellY != rhs.cellY) {
                  return lhs.cellY - rhs.cellY;
              } else {
                  return lhs.cellX - rhs.cellX;
              }
          }
      };
  
      /**
       * Temporary resource held while we don't want to handle info changes
       */
      private class SuppressInfoChanges implements AutoCloseable {
  
          SuppressInfoChanges() {
              mInfo.removeListener(Folder.this);
          }
  
          @Override
          public void close() {
              mInfo.addListener(Folder.this);
              updateTextViewFocus();
          }
      }
  
      /**
       * Returns a folder which is already open or null
       */
      public static Folder getOpen(Launcher launcher) {
          return getOpenView(launcher, TYPE_FOLDER);
      }
  
      @Override
      public void logActionCommand(int command) {
          mLauncher.getUserEventDispatcher().logActionCommand(
                  command, getFolderIcon(), getLogContainerType());
      }
  
      @Override
      public int getLogContainerType() {
          return ContainerType.FOLDER;
      }
  
      @Override
      public boolean onBackPressed() {
          if (isEditingName()) {
              mFolderName.dispatchBackKey();
          } else {
              super.onBackPressed();
          }
          return true;
      }
  
      @Override
      public boolean onControllerInterceptTouchEvent(MotionEvent ev) {
          if (ev.getAction() == MotionEvent.ACTION_DOWN) {
              DragLayer dl = mLauncher.getDragLayer();
  
              if (isEditingName()) {
                  if (!dl.isEventOverView(mFolderName, ev)) {
                      mFolderName.dispatchBackKey();
                      return true;
                  }
                  return false;
              } else if (!dl.isEventOverView(this, ev)) {
                  if (mLauncher.getAccessibilityDelegate().isInAccessibleDrag()) {
                      // Do not close the container if in drag and drop.
                      if (!dl.isEventOverView(mLauncher.getDropTargetBar(), ev)) {
                          return true;
                      }
                  } else {
                      mLauncher.getUserEventDispatcher().logActionTapOutside(
                              LoggerUtils.newContainerTarget(ContainerType.FOLDER));
                      close(true);
                      return true;
                  }
              }
          }
          return false;
      }
  
      /**
       * Alternative to using {@link #getClipToOutline()} as it only works with derivatives of
       * rounded rect.
       */
      @Override
      public void setClipPath(Path clipPath) {
          mClipPath = clipPath;
          invalidate();
      }
  
      @Override
      public void draw(Canvas canvas) {
          if (mClipPath != null) {
              int count = canvas.save();
              canvas.clipPath(mClipPath);
              super.draw(canvas);
              canvas.restoreToCount(count);
          } else {
              super.draw(canvas);
          }
      }
  }
  