Android13 Launcher3 锁定Hotseat栏，apk无法替换与生成文件夹
1 需求概述
公司业务需要需要固定Hotseat栏的apk列表，使其不能被替换，固定几个apk,可以让用户
快速使用，增加用户使用感。
2 实现功能核心类
代码路径
packages\apps\Launcher3\src\com\android\launcher3\DropTarget.java
packages\apps\Launcher3\src\com\android\launcher3\Workspace.java
3 核心代码分析
3.1 拖拽类DropTarget分析
/*
* 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;
import android.content.Context;
import android.graphics.Rect;
import com.android.launcher3.accessibility.DragViewStateAnnouncer;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.dragndrop.DragOptions;
import com.android.launcher3.dragndrop.DragView;
import com.android.launcher3.dragndrop.DraggableView;
import com.android.launcher3.folder.FolderNameProvider;
import com.android.launcher3.logging.InstanceId;
import com.android.launcher3.logging.InstanceIdSequence;
import com.android.launcher3.model.data.ItemInfo;
import com.android.launcher3.util.Executors;
/**
* Interface defining an object that can receive a drag.
*
*/
public interface DropTarget {
class DragObject {
public int x = -1;
public int y = -1;
/** X offset from the upper-left corner of the cell to where we touched. */
public int xOffset = -1;
/** Y offset from the upper-left corner of the cell to where we touched. */
public int yOffset = -1;
/** This indicates whether a drag is in final stages, either drop or cancel. It
* differentiates onDragExit, since this is called when the drag is ending, above
* the current drag target, or when the drag moves off the current drag object.
*/
public boolean dragComplete = false;
/** The view that moves around while you drag. */
public DragView dragView = null;
/** The data associated with the object, after item is dropped. */
public ItemInfo dragInfo = null;
/** The data associated with the object being dragged */
public ItemInfo originalDragInfo = null;
/** Where the drag originated */
public DragSource dragSource = null;
/** Indicates that the drag operation was cancelled */
public boolean cancelled = false;
/** Defers removing the DragView from the DragLayer until after the drop animation. */
public boolean deferDragViewCleanupPostAnimation = true;
public DragViewStateAnnouncer stateAnnouncer;
public FolderNameProvider folderNameProvider;
/** The source view (ie. icon, widget etc.) that is being dragged and which the
* DragView represents. May be an actual View class or a virtual stand-in */
public DraggableView originalView = null;
/** Used for matching DROP event with its corresponding DRAG event on the server side. */
public final InstanceId logInstanceId = new InstanceIdSequence().newInstanceId();
public DragObject(Context context) {
if (FeatureFlags.FOLDER_NAME_SUGGEST.get()) {
Executors.MODEL_EXECUTOR.post(() -> {
folderNameProvider = FolderNameProvider.newInstance(context);
});
}
}
/**
* This is used to compute the visual center of the dragView. This point is then
* used to visualize drop locations and determine where to drop an item. The idea is that
* the visual center represents the user's interpretation of where the item is, and hence
* is the appropriate point to use when determining drop location.
*/
public final float[] getVisualCenter(float[] recycle) {
final float res[] = (recycle == null) ? new float[2] : recycle;
Rect dragRegion = dragView.getDragRegion();
// These represent the visual top and left of drag view if a dragRect was provided.
// If a dragRect was not provided, then they correspond to the actual view left and
// top, as the dragRect is in that case taken to be the entire dragView.
int left = x - xOffset - dragRegion.left;
int top = y - yOffset - dragRegion.top;
// In order to find the visual center, we shift by half the dragRect
res[0] = left + dragRegion.width() / 2;
res[1] = top + dragRegion.height() / 2;
return res;
}
}
/**
* Used to temporarily disable certain drop targets
*
* @return boolean specifying whether this drop target is currently enabled
*/
boolean isDropEnabled();
/**
* Handle an object being dropped on the DropTarget.
*
* This will be called only if this target previously returned true for {@link #acceptDrop}. It
* is the responsibility of this target to exit out of the spring loaded mode (either
* immediately or after any pending animations).
*
* If the drop was cancelled for some reason, onDrop will never get called, the UI will
* automatically exit out of this mode.
*/
void onDrop(DragObject dragObject, DragOptions options);
void onDragEnter(DragObject dragObject);
void onDragOver(DragObject dragObject);
void onDragExit(DragObject dragObject);
/**
* Check if a drop action can occur at, or near, the requested location.
* This will be called just before onDrop.
* @return True if the drop will be accepted, false otherwise.
*/
boolean acceptDrop(DragObject dragObject);
void prepareAccessibilityDrop();
// These methods are implemented in Views
void getHitRectRelativeToDragLayer(Rect outRect);
}
DropTarget.java是一个抽象类，定义了一些方法并需要被子类实现，以处理拖放时具体的逻 辑。其中包括：
- onDragEnter：当拖动物品进入DropTarget时调用。
- onDragExit：当拖动物品离开DropTarget时调用。
- onDragOver：当拖动物品在DropTarget上移动时调用。
- onDrop：当拖放操作完成后调用。
我们需要在onDrop方法去执行业务逻辑，DropTarget实现方法我们去Workspace.java中。
3.2 WorkSpace.java分析
/*
* 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;
import static com.android.launcher3.LauncherAnimUtils.SPRING_LOADED_EXIT_DELAY;
import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_APPLICATION;
import static com.android.launcher3.LauncherState.ALL_APPS;
import static com.android.launcher3.LauncherState.FLAG_MULTI_PAGE;
import static com.android.launcher3.LauncherState.FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED;
import static com.android.launcher3.LauncherState.FLAG_WORKSPACE_INACCESSIBLE;
import static com.android.launcher3.LauncherState.HINT_STATE;
import static com.android.launcher3.LauncherState.NORMAL;
import static com.android.launcher3.LauncherState.SPRING_LOADED;
import static com.android.launcher3.anim.AnimatorListeners.forSuccessCallback;
import static com.android.launcher3.dragndrop.DragLayer.ALPHA_INDEX_OVERLAY;
import static com.android.launcher3.logging.StatsLogManager.LAUNCHER_STATE_HOME;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPELEFT;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_SWIPERIGHT;
import static com.android.launcher3.testing.TestProtocol.BAD_STATE;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.LayoutTransition;
import android.animation.ValueAnimator;
import android.animation.ValueAnimator.AnimatorUpdateListener;
import android.annotation.SuppressLint;
import android.app.WallpaperManager;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetProviderInfo;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.Log;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.Toast;
import androidx.annotation.Nullable;
import com.android.launcher3.accessibility.AccessibleDragListenerAdapter;
import com.android.launcher3.accessibility.WorkspaceAccessibilityHelper;
import com.android.launcher3.anim.Interpolators;
import com.android.launcher3.anim.PendingAnimation;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.dot.FolderDotInfo;
import com.android.launcher3.dragndrop.DragController;
import com.android.launcher3.dragndrop.DragLayer;
import com.android.launcher3.dragndrop.DragOptions;
import com.android.launcher3.dragndrop.DragView;
import com.android.launcher3.dragndrop.DraggableView;
import com.android.launcher3.dragndrop.SpringLoadedDragController;
import com.android.launcher3.folder.Folder;
import com.android.launcher3.folder.FolderIcon;
import com.android.launcher3.folder.PreviewBackground;
import com.android.launcher3.graphics.DragPreviewProvider;
import com.android.launcher3.icons.BitmapRenderer;
import com.android.launcher3.icons.FastBitmapDrawable;
import com.android.launcher3.logger.LauncherAtom;
import com.android.launcher3.logging.InstanceId;
import com.android.launcher3.logging.StatsLogManager;
import com.android.launcher3.logging.StatsLogManager.LauncherEvent;
import com.android.launcher3.model.data.FolderInfo;
import com.android.launcher3.model.data.ItemInfo;
import com.android.launcher3.model.data.LauncherAppWidgetInfo;
import com.android.launcher3.model.data.WorkspaceItemFactory;
import com.android.launcher3.model.data.WorkspaceItemInfo;
import com.android.launcher3.pageindicators.PageIndicator;
import com.android.launcher3.statemanager.StateManager;
import com.android.launcher3.statemanager.StateManager.StateHandler;
import com.android.launcher3.states.StateAnimationConfig;
import com.android.launcher3.touch.WorkspaceTouchListener;
import com.android.launcher3.util.EdgeEffectCompat;
import com.android.launcher3.util.Executors;
import com.android.launcher3.util.IntArray;
import com.android.launcher3.util.IntSet;
import com.android.launcher3.util.IntSparseArrayMap;
import com.android.launcher3.util.LauncherBindableItemsContainer;
import com.android.launcher3.util.OverlayEdgeEffect;
import com.android.launcher3.util.PackageUserKey;
import com.android.launcher3.util.RunnableList;
import com.android.launcher3.util.Thunk;
import com.android.launcher3.util.WallpaperOffsetInterpolator;
import com.android.launcher3.widget.LauncherAppWidgetHost;
import com.android.launcher3.widget.LauncherAppWidgetHost.ProviderChangedListener;
import com.android.launcher3.widget.LauncherAppWidgetHostView;
import com.android.launcher3.widget.NavigableAppWidgetHostView;
import com.android.launcher3.widget.PendingAddShortcutInfo;
import com.android.launcher3.widget.PendingAddWidgetInfo;
import com.android.launcher3.widget.PendingAppWidgetHostView;
import com.android.launcher3.widget.WidgetManagerHelper;
import com.android.launcher3.widget.dragndrop.AppWidgetHostViewDragListener;
import com.android.launcher3.widget.util.WidgetSizes;
import com.android.systemui.plugins.shared.LauncherOverlayManager.LauncherOverlay;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* The workspace is a wide area with a wallpaper and a finite number of pages.
* Each page contains a number of icons, folders or widgets the user can
* interact with. A workspace is meant to be used with a fixed width only.
*
* @param Class that extends View and PageIndicator
*/
public class Workspace extends PagedView
implements DropTarget, DragSource, View.OnTouchListener,
DragController.DragListener, Insettable, StateHandler,
WorkspaceLayoutManager, LauncherBindableItemsContainer {
/**
* The value that {@link #mTransitionProgress} must be greater than for
* {@link #transitionStateShouldAllowDrop()} to return true.
*/
private static final float ALLOW_DROP_TRANSITION_PROGRESS = 0.25f;
/**
* The value that {@link #mTransitionProgress} must be greater than for
* {@link #isFinishedSwitchingState()} ()} to return true.
*/
private static final float FINISHED_SWITCHING_STATE_TRANSITION_PROGRESS = 0.5f;
private static final float SIGNIFICANT_MOVE_SCREEN_WIDTH_PERCENTAGE = 0.15f;
private static final boolean ENFORCE_DRAG_EVENT_ORDER = false;
private static final int ADJACENT_SCREEN_DROP_DURATION = 300;
public static final int DEFAULT_PAGE = 0;
private static final int DEFAULT_SMARTSPACE_HEIGHT = 1;
private static final int EXPANDED_SMARTSPACE_HEIGHT = 2;
private LayoutTransition mLayoutTransition;
@Thunk
final WallpaperManager mWallpaperManager;
private ShortcutAndWidgetContainer mDragSourceInternal;
@Thunk
final IntSparseArrayMap mWorkspaceScreens = new IntSparseArrayMap<>();
@Thunk
final IntArray mScreenOrder = new IntArray();
@Thunk
boolean mDeferRemoveExtraEmptyScreen = false;
/**
* CellInfo for the cell that is currently being dragged
*/
private CellLayout.CellInfo mDragInfo;
/**
* Target drop area calculated during last acceptDrop call.
*/
@Thunk
int[] mTargetCell = new int[2];
private int mDragOverX = -1;
private int mDragOverY = -1;
/**
* The CellLayout that is currently being dragged over
*/
@Thunk
CellLayout mDragTargetLayout = null;
/**
* The CellLayout that we will show as highlighted
*/
private CellLayout mDragOverlappingLayout = null;
/**
* The CellLayout which will be dropped to
*/
private CellLayout mDropToLayout = null;
@Thunk
final Launcher mLauncher;
@Thunk
DragController mDragController;
private final int[] mTempXY = new int[2];
private final float[] mTempFXY = new float[2];
private final Rect mTempRect = new Rect();
@Thunk
float[] mDragViewVisualCenter = new float[2];
private SpringLoadedDragController mSpringLoadedDragController;
private boolean mIsSwitchingState = false;
boolean mChildrenLayersEnabled = true;
private boolean mStripScreensOnPageStopMoving = false;
private boolean mWorkspaceFadeInAdjacentScreens;
final WallpaperOffsetInterpolator mWallpaperOffset;
private boolean mUnlockWallpaperFromDefaultPageOnLayout;
public static final int REORDER_TIMEOUT = 650;
private final Alarm mReorderAlarm = new Alarm();
private PreviewBackground mFolderCreateBg;
private FolderIcon mDragOverFolderIcon = null;
private boolean mCreateUserFolderOnDrop = false;
private boolean mAddToExistingFolderOnDrop = false;
// Variables relating to touch disambiguation (scrolling workspace vs. scrolling a widget)
private float mXDown;
private float mYDown;
private View mQsb;
private boolean mIsEventOverQsb;
final static float START_DAMPING_TOUCH_SLOP_ANGLE = (float) Math.PI / 6;
final static float MAX_SWIPE_ANGLE = (float) Math.PI / 3;
final static float TOUCH_SLOP_DAMPING_FACTOR = 4;
// Relating to the animation of items being dropped externally
public static final int ANIMATE_INTO_POSITION_AND_DISAPPEAR = 0;
public static final int ANIMATE_INTO_POSITION_AND_REMAIN = 1;
public static final int ANIMATE_INTO_POSITION_AND_RESIZE = 2;
public static final int COMPLETE_TWO_STAGE_WIDGET_DROP_ANIMATION = 3;
public static final int CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION = 4;
// Related to dragging, folder creation and reordering
private static final int DRAG_MODE_NONE = 0;
private static final int DRAG_MODE_CREATE_FOLDER = 1;
private static final int DRAG_MODE_ADD_TO_FOLDER = 2;
private static final int DRAG_MODE_REORDER = 3;
private int mDragMode = DRAG_MODE_NONE;
@Thunk
int mLastReorderX = -1;
@Thunk
int mLastReorderY = -1;
private SparseArray mSavedStates;
private final IntArray mRestoredPages = new IntArray();
private float mCurrentScale;
private float mTransitionProgress;
// State related to Launcher Overlay
private OverlayEdgeEffect mOverlayEdgeEffect;
boolean mOverlayShown = false;
private Runnable mOnOverlayHiddenCallback;
private boolean mForceDrawAdjacentPages = false;
// Total over scrollX in the overlay direction.
private float mOverlayTranslation;
// Handles workspace state transitions
private final WorkspaceStateTransitionAnimation mStateTransitionAnimation;
private final StatsLogManager mStatsLogManager;
/**
* 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 Workspace(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
/**
* Used to inflate the Workspace from XML.
*
* @param context The application's context.
* @param attrs The attributes set containing the Workspace's customization values.
* @param defStyle Unused.
*/
public Workspace(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mLauncher = Launcher.getLauncher(context);
mStateTransitionAnimation = new WorkspaceStateTransitionAnimation(mLauncher, this);
mWallpaperManager = WallpaperManager.getInstance(context);
mWallpaperOffset = new WallpaperOffsetInterpolator(this);
setHapticFeedbackEnabled(false);
initWorkspace();
// Disable multitouch across the workspace/all apps/customize tray
setMotionEventSplittingEnabled(true);
setOnTouchListener(new WorkspaceTouchListener(mLauncher, this));
mStatsLogManager = StatsLogManager.newInstance(context);
}
@Override
public void setInsets(Rect insets) {
DeviceProfile grid = mLauncher.getDeviceProfile();
mWorkspaceFadeInAdjacentScreens = grid.shouldFadeAdjacentWorkspaceScreens();
Rect padding = grid.workspacePadding;
setPadding(padding.left, padding.top, padding.right, padding.bottom);
mInsets.set(insets);
if (mWorkspaceFadeInAdjacentScreens) {
// In landscape mode the page spacing is set to the default.
setPageSpacing(grid.edgeMarginPx);
} else {
// In portrait, we want the pages spaced such that there is no
// overhang of the previous / next page into the current page viewport.
// We assume symmetrical padding in portrait mode.
int maxInsets = Math.max(insets.left, insets.right);
int maxPadding = Math.max(grid.edgeMarginPx, padding.left + 1);
setPageSpacing(Math.max(maxInsets, maxPadding));
}
updateCellLayoutPadding();
updateWorkspaceWidgetsSizes();
}
private void updateCellLayoutPadding() {
Rect padding = mLauncher.getDeviceProfile().cellLayoutPaddingPx;
mWorkspaceScreens.forEach(
s -> s.setPadding(padding.left, padding.top, padding.right, padding.bottom));
}
private void updateWorkspaceWidgetsSizes() {
int numberOfScreens = mScreenOrder.size();
for (int i = 0; i < numberOfScreens; i++) {
ShortcutAndWidgetContainer shortcutAndWidgetContainer =
mWorkspaceScreens.get(mScreenOrder.get(i)).getShortcutsAndWidgets();
int shortcutsAndWidgetCount = shortcutAndWidgetContainer.getChildCount();
for (int j = 0; j < shortcutsAndWidgetCount; j++) {
View view = shortcutAndWidgetContainer.getChildAt(j);
if (view instanceof LauncherAppWidgetHostView
&& view.getTag() instanceof LauncherAppWidgetInfo) {
LauncherAppWidgetInfo launcherAppWidgetInfo =
(LauncherAppWidgetInfo) view.getTag();
WidgetSizes.updateWidgetSizeRanges((LauncherAppWidgetHostView) view,
mLauncher, launcherAppWidgetInfo.spanX, launcherAppWidgetInfo.spanY);
}
}
}
}
/**
* Estimates the size of an item using spans: hSpan, vSpan.
*
* @return MAX_VALUE for each dimension if unsuccessful.
*/
public int[] estimateItemSize(ItemInfo itemInfo) {
int[] size = new int[2];
if (getChildCount() > 0) {
// Use the first page to estimate the child position
CellLayout cl = (CellLayout) getChildAt(0);
boolean isWidget = itemInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET;
Rect r = estimateItemPosition(cl, 0, 0, itemInfo.spanX, itemInfo.spanY);
float scale = 1;
if (isWidget) {
DeviceProfile profile = mLauncher.getDeviceProfile();
scale = Utilities.shrinkRect(r, profile.appWidgetScale.x, profile.appWidgetScale.y);
}
size[0] = r.width();
size[1] = r.height();
if (isWidget) {
size[0] /= scale;
size[1] /= scale;
}
return size;
} else {
size[0] = Integer.MAX_VALUE;
size[1] = Integer.MAX_VALUE;
return size;
}
}
public float getWallpaperOffsetForCenterPage() {
return getWallpaperOffsetForPage(getPageNearestToCenterOfScreen());
}
private float getWallpaperOffsetForPage(int page) {
int pageScroll = getScrollForPage(page);
return mWallpaperOffset.wallpaperOffsetForScroll(pageScroll);
}
/**
* Returns the number of pages used for the wallpaper parallax.
*/
public int getNumPagesForWallpaperParallax() {
return mWallpaperOffset.getNumPagesForWallpaperParallax();
}
public Rect estimateItemPosition(CellLayout cl, int hCell, int vCell, int hSpan, int vSpan) {
Rect r = new Rect();
cl.cellToRect(hCell, vCell, hSpan, vSpan, r);
return r;
}
@Override
public void onDragStart(DragObject dragObject, DragOptions options) {
if (ENFORCE_DRAG_EVENT_ORDER) {
enforceDragParity("onDragStart", 0, 0);
}
if (mDragInfo != null && mDragInfo.cell != null) {
CellLayout layout = (CellLayout) (mDragInfo.cell instanceof LauncherAppWidgetHostView
? dragObject.dragView.getContentViewParent().getParent()
: mDragInfo.cell.getParent().getParent());
layout.markCellsAsUnoccupiedForView(mDragInfo.cell);
}
updateChildrenLayersEnabled();
// Do not add a new page if it is a accessible drag which was not started by the workspace.
// We do not support accessibility drag from other sources and instead provide a direct
// action for move/add to homescreen.
// When a accessible drag is started by the folder, we only allow rearranging withing the
// folder.
boolean addNewPage = !(options.isAccessibleDrag && dragObject.dragSource != this);
if (addNewPage) {
mDeferRemoveExtraEmptyScreen = false;
addExtraEmptyScreenOnDrag(dragObject);
if (dragObject.dragInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
&& dragObject.dragSource != this) {
// When dragging a widget from different source, move to a page which has
// enough space to place this widget (after rearranging/resizing). We special case
// widgets as they cannot be placed inside a folder.
// Start at the current page and search right (on LTR) until finding a page with
// enough space. Since an empty screen is the furthest right, a page must be found.
int currentPage = getDestinationPage();
for (int pageIndex = currentPage; pageIndex < getPageCount(); pageIndex++) {
CellLayout page = (CellLayout) getPageAt(pageIndex);
if (page.hasReorderSolution(dragObject.dragInfo)) {
setCurrentPage(pageIndex);
break;
}
}
}
}
// Always enter the spring loaded mode
mLauncher.getStateManager().goToState(SPRING_LOADED);
mStatsLogManager.logger().withItemInfo(dragObject.dragInfo)
.withInstanceId(dragObject.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DRAG_STARTED);
}
private boolean isTwoPanelEnabled() {
return mLauncher.mDeviceProfile.isTwoPanels;
}
@Override
public int getPanelCount() {
return isTwoPanelEnabled() ? 2 : super.getPanelCount();
}
public void deferRemoveExtraEmptyScreen() {
mDeferRemoveExtraEmptyScreen = true;
}
@Override
public void onDragEnd() {
if (ENFORCE_DRAG_EVENT_ORDER) {
enforceDragParity("onDragEnd", 0, 0);
}
updateChildrenLayersEnabled();
StateManager stateManager = mLauncher.getStateManager();
stateManager.addStateListener(new StateManager.StateListener() {
@Override
public void onStateTransitionComplete(LauncherState finalState) {
if (finalState == NORMAL) {
if (!mDeferRemoveExtraEmptyScreen) {
removeExtraEmptyScreen(true /* stripEmptyScreens */);
}
stateManager.removeStateListener(this);
}
}
});
mDragInfo = null;
mDragSourceInternal = null;
}
/**
* Initializes various states for this workspace.
*/
protected void initWorkspace() {
mCurrentPage = DEFAULT_PAGE;
setClipToPadding(false);
setupLayoutTransition();
// Set the wallpaper dimensions when Launcher starts up
setWallpaperDimension();
}
private void setupLayoutTransition() {
// We want to show layout transitions when pages are deleted, to close the gap.
mLayoutTransition = new LayoutTransition();
mLayoutTransition.enableTransitionType(LayoutTransition.DISAPPEARING);
mLayoutTransition.enableTransitionType(LayoutTransition.CHANGE_DISAPPEARING);
// Change the interpolators such that the fade animation plays before the move animation.
// This prevents empty adjacent pages to overlay during animation
mLayoutTransition.setInterpolator(LayoutTransition.DISAPPEARING,
Interpolators.clampToProgress(Interpolators.ACCEL_DEACCEL, 0, 0.5f));
mLayoutTransition.setInterpolator(LayoutTransition.CHANGE_DISAPPEARING,
Interpolators.clampToProgress(Interpolators.ACCEL_DEACCEL, 0.5f, 1));
mLayoutTransition.disableTransitionType(LayoutTransition.APPEARING);
mLayoutTransition.disableTransitionType(LayoutTransition.CHANGE_APPEARING);
setLayoutTransition(mLayoutTransition);
}
void enableLayoutTransitions() {
setLayoutTransition(mLayoutTransition);
}
void disableLayoutTransitions() {
setLayoutTransition(null);
}
@Override
public void onViewAdded(View child) {
if (!(child instanceof CellLayout)) {
throw new IllegalArgumentException("A Workspace can only have CellLayout children.");
}
CellLayout cl = ((CellLayout) child);
cl.setOnInterceptTouchListener(this);
cl.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
super.onViewAdded(child);
}
/**
* Initializes and binds the first page
*/
public void bindAndInitFirstWorkspaceScreen() {
if (!FeatureFlags.QSB_ON_FIRST_SCREEN) {
return;
}
// Add the first page
CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, getChildCount());
// Always add a QSB on the first screen.
if (mQsb == null) {
// In transposed layout, we add the QSB in the Grid. As workspace does not touch the
// edges, we do not need a full width QSB.
mQsb = LayoutInflater.from(getContext())
.inflate(R.layout.search_container_workspace, firstPage, false);
}
int cellVSpan = FeatureFlags.EXPANDED_SMARTSPACE.get()
? EXPANDED_SMARTSPACE_HEIGHT : DEFAULT_SMARTSPACE_HEIGHT;
int cellHSpan = mLauncher.getDeviceProfile().inv.numSearchContainerColumns;
CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, cellHSpan, cellVSpan);
lp.canReorder = false;
if (!firstPage.addViewToCellLayout(mQsb, 0, R.id.search_container_workspace, lp, true)) {
Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");
mQsb = null;
}
}
public void removeAllWorkspaceScreens() {
// Disable all layout transitions before removing all pages to ensure that we don't get the
// transition animations competing with us changing the scroll when we add pages
disableLayoutTransitions();
// Recycle the QSB widget
if (mQsb != null) {
((ViewGroup) mQsb.getParent()).removeView(mQsb);
}
// Remove the pages and clear the screen models
removeFolderListeners();
removeAllViews();
mScreenOrder.clear();
mWorkspaceScreens.clear();
// Remove any deferred refresh callbacks
mLauncher.mHandler.removeCallbacksAndMessages(DeferredWidgetRefresh.class);
// Ensure that the first page is always present
bindAndInitFirstWorkspaceScreen();
// Re-enable the layout transitions
enableLayoutTransitions();
}
public void insertNewWorkspaceScreenBeforeEmptyScreen(int screenId) {
// Find the index to insert this view into. If the empty screen exists, then
// insert it before that.
int insertIndex = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
if (insertIndex < 0) {
insertIndex = mScreenOrder.size();
}
insertNewWorkspaceScreen(screenId, insertIndex);
}
public void insertNewWorkspaceScreen(int screenId) {
insertNewWorkspaceScreen(screenId, getChildCount());
}
public CellLayout insertNewWorkspaceScreen(int screenId, int insertIndex) {
if (mWorkspaceScreens.containsKey(screenId)) {
throw new RuntimeException("Screen id " + screenId + " already exists!");
}
// Inflate the cell layout, but do not add it automatically so that we can get the newly
// created CellLayout.
CellLayout newScreen = (CellLayout) LayoutInflater.from(getContext()).inflate(
R.layout.workspace_screen, this, false /* attachToRoot */);
mWorkspaceScreens.put(screenId, newScreen);
mScreenOrder.add(insertIndex, screenId);
addView(newScreen, insertIndex);
mStateTransitionAnimation.applyChildState(
mLauncher.getStateManager().getState(), newScreen, insertIndex);
updatePageScrollValues();
updateCellLayoutPadding();
return newScreen;
}
private void addExtraEmptyScreenOnDrag(DragObject dragObject) {
boolean lastChildOnScreen = false;
boolean childOnFinalScreen = false;
if (mDragSourceInternal != null) {
int dragSourceChildCount = mDragSourceInternal.getChildCount();
// If the icon was dragged from Hotseat, there is no page pair
if (isTwoPanelEnabled() && !(mDragSourceInternal.getParent() instanceof Hotseat)) {
int pagePairScreenId = getScreenPair(dragObject.dragInfo.screenId);
CellLayout pagePair = mWorkspaceScreens.get(pagePairScreenId);
dragSourceChildCount += pagePair.getShortcutsAndWidgets().getChildCount();
}
// When the drag view content is a LauncherAppWidgetHostView, we should increment the
// drag source child count by 1 because the widget in drag has been detached from its
// original parent, ShortcutAndWidgetContainer, and reattached to the DragView.
if (dragObject.dragView.getContentView() instanceof LauncherAppWidgetHostView) {
dragSourceChildCount++;
}
if (dragSourceChildCount == 1) {
lastChildOnScreen = true;
}
CellLayout cl = (CellLayout) mDragSourceInternal.getParent();
if (getLeftmostVisiblePageForIndex(indexOfChild(cl))
== getLeftmostVisiblePageForIndex(getPageCount() - 1)) {
childOnFinalScreen = true;
}
}
// If this is the last item on the final screen
if (lastChildOnScreen && childOnFinalScreen) {
return;
}
forEachExtraEmptyPageId(extraEmptyPageId -> {
if (!mWorkspaceScreens.containsKey(extraEmptyPageId)) {
insertNewWorkspaceScreen(extraEmptyPageId);
}
});
}
/**
* Inserts extra empty pages to the end of the existing workspaces.
* Usually we add one extra empty screen, but when two panel home is enabled we add
* two extra screens.
**/
public void addExtraEmptyScreens() {
forEachExtraEmptyPageId(extraEmptyPageId -> {
if (!mWorkspaceScreens.containsKey(extraEmptyPageId)) {
insertNewWorkspaceScreen(extraEmptyPageId);
}
});
}
/**
* Calls the consumer with all the necessary extra empty page IDs.
* On a normal one panel Workspace that means only EXTRA_EMPTY_SCREEN_ID,
* but in a two panel scenario this also includes EXTRA_EMPTY_SCREEN_SECOND_ID.
*/
private void forEachExtraEmptyPageId(Consumer callback) {
callback.accept(EXTRA_EMPTY_SCREEN_ID);
if (isTwoPanelEnabled()) {
callback.accept(EXTRA_EMPTY_SCREEN_SECOND_ID);
}
}
/**
* If two panel home is enabled we convert the last two screens that are visible at the same
* time. In other cases we only convert the last page.
*/
private void convertFinalScreenToEmptyScreenIfNecessary() {
if (mLauncher.isWorkspaceLoading()) {
// Invalid and dangerous operation if workspace is loading
return;
}
int panelCount = getPanelCount();
if (hasExtraEmptyScreens() || mScreenOrder.size() < panelCount) {
return;
}
SparseArray finalScreens = new SparseArray<>();
int pageCount = mScreenOrder.size();
// First we add the last page(s) to the finalScreens collection. The number of final pages
// depends on the panel count.
for (int pageIndex = pageCount - panelCount; pageIndex < pageCount; pageIndex++) {
int screenId = mScreenOrder.get(pageIndex);
CellLayout screen = mWorkspaceScreens.get(screenId);
if (screen == null || screen.getShortcutsAndWidgets().getChildCount() != 0
|| screen.isDropPending()) {
// Final screen doesn't exist or it isn't empty or there's a pending drop
return;
}
finalScreens.append(screenId, screen);
}
// Then we remove the final screens from the collections (but not from the view hierarchy)
// and we store them as extra empty screens.
for (int i = 0; i < finalScreens.size(); i++) {
int screenId = finalScreens.keyAt(i);
CellLayout screen = finalScreens.get(screenId);
mWorkspaceScreens.remove(screenId);
mScreenOrder.removeValue(screenId);
int newScreenId = mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)
? EXTRA_EMPTY_SCREEN_SECOND_ID : EXTRA_EMPTY_SCREEN_ID;
mWorkspaceScreens.put(newScreenId, screen);
mScreenOrder.add(newScreenId);
}
}
public void removeExtraEmptyScreen(boolean stripEmptyScreens) {
removeExtraEmptyScreenDelayed(0, stripEmptyScreens, null);
}
/**
* The purpose of this method is to remove empty pages from Workspace.
* Empty page(s) from the end of mWorkspaceScreens will always be removed. The pages with
* ID = Workspace.EXTRA_EMPTY_SCREEN_IDS will be removed if there are other non-empty pages.
* If there are no more non-empty pages left, extra empty page(s) will either stay or get added.
*
* If stripEmptyScreens is true, all empty pages (not just the ones on the end) will be removed
* from the Workspace, and if there are no more pages left then extra empty page(s) will be
* added.
*
* The number of extra empty pages is equal to what getPanelCount() returns.
*
* After the method returns the possible pages are:
* stripEmptyScreens = true : [non-empty pages, extra empty page(s) alone]
* stripEmptyScreens = false : [non-empty pages, empty pages (not in the end),
* extra empty page(s) alone]
*/
public void removeExtraEmptyScreenDelayed(
int delay, boolean stripEmptyScreens, Runnable onComplete) {
if (mLauncher.isWorkspaceLoading()) {
// Don't strip empty screens if the workspace is still loading
return;
}
if (delay > 0) {
postDelayed(
() -> removeExtraEmptyScreenDelayed(0, stripEmptyScreens, onComplete), delay);
return;
}
// First we convert the last page to an extra page if the last page is empty
// and we don't already have an extra page.
convertFinalScreenToEmptyScreenIfNecessary();
// Then we remove the extra page(s) if they are not the only pages left in Workspace.
if (hasExtraEmptyScreens()) {
forEachExtraEmptyPageId(extraEmptyPageId -> {
removeView(mWorkspaceScreens.get(extraEmptyPageId));
mWorkspaceScreens.remove(extraEmptyPageId);
mScreenOrder.removeValue(extraEmptyPageId);
});
setCurrentPage(getNextPage());
// Update the page indicator to reflect the removed page.
showPageIndicatorAtCurrentScroll();
}
if (stripEmptyScreens) {
// This will remove all empty pages from the Workspace. If there are no more pages left,
// it will add extra page(s) so that users can put items on at least one page.
stripEmptyScreens();
}
if (onComplete != null) {
onComplete.run();
}
}
public boolean hasExtraEmptyScreens() {
return mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_ID)
&& getChildCount() > getPanelCount()
&& (!isTwoPanelEnabled()
|| mWorkspaceScreens.containsKey(EXTRA_EMPTY_SCREEN_SECOND_ID));
}
/**
* Commits the extra empty pages then returns the screen ids of those new screens.
* Usually there's only one extra empty screen, but when two panel home is enabled we commit
* two extra screens.
*
* Returns an empty IntSet in case we cannot commit any new screens.
*/
public IntSet commitExtraEmptyScreens() {
if (mLauncher.isWorkspaceLoading()) {
// Invalid and dangerous operation if workspace is loading
return new IntSet();
}
IntSet extraEmptyPageIds = new IntSet();
forEachExtraEmptyPageId(extraEmptyPageId ->
extraEmptyPageIds.add(commitExtraEmptyScreen(extraEmptyPageId)));
return extraEmptyPageIds;
}
private int commitExtraEmptyScreen(int emptyScreenId) {
CellLayout cl = mWorkspaceScreens.get(emptyScreenId);
mWorkspaceScreens.remove(emptyScreenId);
mScreenOrder.removeValue(emptyScreenId);
int newScreenId = LauncherSettings.Settings.call(getContext().getContentResolver(),
LauncherSettings.Settings.METHOD_NEW_SCREEN_ID)
.getInt(LauncherSettings.Settings.EXTRA_VALUE);
// Launcher database isn't aware of empty pages that are already bound, so we need to
// skip those IDs manually.
while (mWorkspaceScreens.containsKey(newScreenId)) {
newScreenId++;
}
mWorkspaceScreens.put(newScreenId, cl);
mScreenOrder.add(newScreenId);
return newScreenId;
}
@Override
public Hotseat getHotseat() {
return mLauncher.getHotseat();
}
@Override
public void onAddDropTarget(DropTarget target) {
mDragController.addDropTarget(target);
}
@Override
public CellLayout getScreenWithId(int screenId) {
return mWorkspaceScreens.get(screenId);
}
public int getIdForScreen(CellLayout layout) {
int index = mWorkspaceScreens.indexOfValue(layout);
if (index != -1) {
return mWorkspaceScreens.keyAt(index);
}
return -1;
}
public int getPageIndexForScreenId(int screenId) {
return indexOfChild(mWorkspaceScreens.get(screenId));
}
public IntSet getCurrentPageScreenIds() {
return IntSet.wrap(getScreenIdForPageIndex(getCurrentPage()));
}
public int getScreenIdForPageIndex(int index) {
if (0 <= index && index < mScreenOrder.size()) {
return mScreenOrder.get(index);
}
return -1;
}
public IntArray getScreenOrder() {
return mScreenOrder;
}
/**
* Returns the screen ID of a page that is shown together with the given page screen ID when the
* two panel UI is enabled.
*/
public int getScreenPair(int screenId) {
if (screenId == EXTRA_EMPTY_SCREEN_ID) {
return EXTRA_EMPTY_SCREEN_SECOND_ID;
} else if (screenId == EXTRA_EMPTY_SCREEN_SECOND_ID) {
return EXTRA_EMPTY_SCREEN_ID;
} else if (screenId % 2 == 0) {
return screenId + 1;
} else {
return screenId - 1;
}
}
/**
* Returns {@link CellLayout} that is shown together with the given {@link CellLayout} when the
* two panel UI is enabled.
*/
@Nullable
public CellLayout getScreenPair(CellLayout cellLayout) {
if (!isTwoPanelEnabled()) {
return null;
}
int screenId = getIdForScreen(cellLayout);
if (screenId == -1) {
return null;
}
return getScreenWithId(getScreenPair(screenId));
}
public void stripEmptyScreens() {
if (mLauncher.isWorkspaceLoading()) {
// Don't strip empty screens if the workspace is still loading.
// This is dangerous and can result in data loss.
return;
}
if (isPageInTransition()) {
mStripScreensOnPageStopMoving = true;
return;
}
int currentPage = getNextPage();
IntArray removeScreens = new IntArray();
int total = mWorkspaceScreens.size();
for (int i = 0; i < total; i++) {
int id = mWorkspaceScreens.keyAt(i);
CellLayout cl = mWorkspaceScreens.valueAt(i);
// FIRST_SCREEN_ID can never be removed.
if ((!FeatureFlags.QSB_ON_FIRST_SCREEN || id > FIRST_SCREEN_ID)
&& cl.getShortcutsAndWidgets().getChildCount() == 0) {
removeScreens.add(id);
}
}
// When two panel home is enabled we only remove an empty page if both visible pages are
// empty.
if (isTwoPanelEnabled()) {
// We go through all the pages that were marked as removable and check their page pair
Iterator removeScreensIterator = removeScreens.iterator();
while (removeScreensIterator.hasNext()) {
int pageToRemove = removeScreensIterator.next();
int pagePair = getScreenPair(pageToRemove);
if (!removeScreens.contains(pagePair)) {
// The page pair isn't empty so we want to remove the current page from the
// removable pages' collection
removeScreensIterator.remove();
}
}
}
// We enforce at least one page (two pages on two panel home) to add new items to.
// In the case that we remove the last such screen(s), we convert the last screen(s)
// to the empty screen(s)
int minScreens = getPanelCount();
int pageShift = 0;
for (int i = 0; i < removeScreens.size(); i++) {
int id = removeScreens.get(i);
CellLayout cl = mWorkspaceScreens.get(id);
mWorkspaceScreens.remove(id);
mScreenOrder.removeValue(id);
if (getChildCount() > minScreens) {
// If this isn't the last page, just remove it
if (indexOfChild(cl) < currentPage) {
pageShift++;
}
removeView(cl);
} else {
// The last page(s) should be converted into extra empty page(s)
int extraScreenId = isTwoPanelEnabled() && id % 2 == 1
// This is the right panel in a two panel scenario
? EXTRA_EMPTY_SCREEN_SECOND_ID
// This is either the last screen in a one panel scenario, or the left panel
// in a two panel scenario when there are only two empty pages left
: EXTRA_EMPTY_SCREEN_ID;
mWorkspaceScreens.put(extraScreenId, cl);
mScreenOrder.add(extraScreenId);
}
}
if (pageShift >= 0) {
setCurrentPage(currentPage - pageShift);
}
}
/**
* Called directly from a CellLayout (not by the framework), after we've been added as a
* listener via setOnInterceptTouchEventListener(). This allows us to tell the CellLayout
* that it should intercept touch events, which is not something that is normally supported.
*/
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {
return shouldConsumeTouch(v);
}
private boolean shouldConsumeTouch(View v) {
return !workspaceIconsCanBeDragged()
|| (!workspaceInModalState() && !isVisible(v));
}
public boolean isSwitchingState() {
return mIsSwitchingState;
}
/**
* This differs from isSwitchingState in that we take into account how far the transition
* has completed.
*/
public boolean isFinishedSwitchingState() {
return !mIsSwitchingState
|| (mTransitionProgress > FINISHED_SWITCHING_STATE_TRANSITION_PROGRESS);
}
@Override
public boolean dispatchUnhandledMove(View focused, int direction) {
if (workspaceInModalState() || !isFinishedSwitchingState()) {
// when the home screens are shrunken, shouldn't allow side-scrolling
return false;
}
return super.dispatchUnhandledMove(focused, direction);
}
@Override
protected void updateIsBeingDraggedOnTouchDown(MotionEvent ev) {
super.updateIsBeingDraggedOnTouchDown(ev);
mXDown = ev.getX();
mYDown = ev.getY();
if (mQsb != null) {
mTempFXY[0] = mXDown + getScrollX();
mTempFXY[1] = mYDown + getScrollY();
Utilities.mapCoordInSelfToDescendant(mQsb, this, mTempFXY);
mIsEventOverQsb = mQsb.getLeft() <= mTempFXY[0] && mQsb.getRight() >= mTempFXY[0]
&& mQsb.getTop() <= mTempFXY[1] && mQsb.getBottom() >= mTempFXY[1];
} else {
mIsEventOverQsb = false;
}
}
@Override
protected void determineScrollingStart(MotionEvent ev) {
if (!isFinishedSwitchingState() || mIsEventOverQsb) return;
float deltaX = ev.getX() - mXDown;
float absDeltaX = Math.abs(deltaX);
float absDeltaY = Math.abs(ev.getY() - mYDown);
if (Float.compare(absDeltaX, 0f) == 0) return;
float slope = absDeltaY / absDeltaX;
float theta = (float) Math.atan(slope);
if (absDeltaX > mTouchSlop || absDeltaY > mTouchSlop) {
cancelCurrentPageLongPress();
}
if (theta > MAX_SWIPE_ANGLE) {
// Above MAX_SWIPE_ANGLE, we don't want to ever start scrolling the workspace
return;
} else if (theta > START_DAMPING_TOUCH_SLOP_ANGLE) {
// Above START_DAMPING_TOUCH_SLOP_ANGLE and below MAX_SWIPE_ANGLE, we want to
// increase the touch slop to make it harder to begin scrolling the workspace. This
// results in vertically scrolling widgets to more easily. The higher the angle, the
// more we increase touch slop.
theta -= START_DAMPING_TOUCH_SLOP_ANGLE;
float extraRatio = (float)
Math.sqrt((theta / (MAX_SWIPE_ANGLE - START_DAMPING_TOUCH_SLOP_ANGLE)));
super.determineScrollingStart(ev, 1 + TOUCH_SLOP_DAMPING_FACTOR * extraRatio);
} else {
// Below START_DAMPING_TOUCH_SLOP_ANGLE, we don't do anything special
super.determineScrollingStart(ev);
}
}
protected void onPageBeginTransition() {
super.onPageBeginTransition();
updateChildrenLayersEnabled();
}
protected void onPageEndTransition() {
super.onPageEndTransition();
updateChildrenLayersEnabled();
if (mDragController.isDragging()) {
if (workspaceInModalState()) {
// If we are in springloaded mode, then force an event to check if the current touch
// is under a new page (to scroll to)
mDragController.forceTouchMove();
}
}
if (mStripScreensOnPageStopMoving) {
stripEmptyScreens();
mStripScreensOnPageStopMoving = false;
}
// Inform the Launcher activity that the page transition ended so that it can react to the
// newly visible page if it wants to.
mLauncher.onPageEndTransition();
}
public void setLauncherOverlay(LauncherOverlay overlay) {
mOverlayEdgeEffect = overlay == null ? null : new OverlayEdgeEffect(getContext(), overlay);
EdgeEffectCompat newEffect = overlay == null
? new EdgeEffectCompat(getContext()) : mOverlayEdgeEffect;
if (mIsRtl) {
mEdgeGlowRight = newEffect;
} else {
mEdgeGlowLeft = newEffect;
}
onOverlayScrollChanged(0);
}
public boolean hasOverlay() {
return mOverlayEdgeEffect != null;
}
@Override
protected void snapToDestination() {
if (mOverlayEdgeEffect != null && !mOverlayEdgeEffect.isFinished()) {
snapToPageImmediately(0);
} else {
super.snapToDestination();
}
}
@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
super.onScrollChanged(l, t, oldl, oldt);
// Update the page indicator progress.
// Unlike from other states, we show the page indicator when transitioning from HINT_STATE.
boolean isSwitchingState = mIsSwitchingState
&& mLauncher.getStateManager().getCurrentStableState() != HINT_STATE;
boolean isTransitioning = isSwitchingState
|| (getLayoutTransition() != null && getLayoutTransition().isRunning());
if (!isTransitioning) {
showPageIndicatorAtCurrentScroll();
}
updatePageAlphaValues();
updatePageScrollValues();
enableHwLayersOnVisiblePages();
}
public void showPageIndicatorAtCurrentScroll() {
if (mPageIndicator != null) {
mPageIndicator.setScroll(getScrollX(), computeMaxScroll());
}
}
@Override
protected boolean shouldFlingForVelocity(int velocityX) {
// When the overlay is moving, the fling or settle transition is controlled by the overlay.
return Float.compare(Math.abs(mOverlayTranslation), 0) == 0 &&
super.shouldFlingForVelocity(velocityX);
}
/**
* The overlay scroll is being controlled locally, just update our overlay effect
*/
public void onOverlayScrollChanged(float scroll) {
if (Float.compare(scroll, 1f) == 0) {
if (!mOverlayShown) {
mLauncher.getStatsLogManager().logger()
.withSrcState(LAUNCHER_STATE_HOME)
.withDstState(LAUNCHER_STATE_HOME)
.withContainerInfo(LauncherAtom.ContainerInfo.newBuilder()
.setWorkspace(
LauncherAtom.WorkspaceContainer.newBuilder()
.setPageIndex(0))
.build())
.log(LAUNCHER_SWIPELEFT);
}
mOverlayShown = true;
// Let the Launcher activity know that the overlay is now visible.
mLauncher.onOverlayVisibilityChanged(mOverlayShown);
// Not announcing the overlay page for accessibility since it announces itself.
} else if (Float.compare(scroll, 0f) == 0) {
if (mOverlayShown) {
// TODO: this is logged unnecessarily on home gesture.
mLauncher.getStatsLogManager().logger()
.withSrcState(LAUNCHER_STATE_HOME)
.withDstState(LAUNCHER_STATE_HOME)
.withContainerInfo(LauncherAtom.ContainerInfo.newBuilder()
.setWorkspace(
LauncherAtom.WorkspaceContainer.newBuilder()
.setPageIndex(-1))
.build())
.log(LAUNCHER_SWIPERIGHT);
} else if (Float.compare(mOverlayTranslation, 0f) != 0) {
// When arriving to 0 overscroll from non-zero overscroll, announce page for
// accessibility since default announcements were disabled while in overscroll
// state.
// Not doing this if mOverlayShown because in that case the accessibility service
// will announce the launcher window description upon regaining focus after
// switching from the overlay screen.
announcePageForAccessibility();
}
mOverlayShown = false;
// Let the Launcher activity know that the overlay is no longer visible.
mLauncher.onOverlayVisibilityChanged(mOverlayShown);
tryRunOverlayCallback();
}
float offset = 0f;
scroll = Math.max(scroll - offset, 0);
scroll = Math.min(1, scroll / (1 - offset));
float alpha = 1 - Interpolators.DEACCEL_3.getInterpolation(scroll);
float transX = mLauncher.getDragLayer().getMeasuredWidth() * scroll;
if (mIsRtl) {
transX = -transX;
}
mOverlayTranslation = transX;
// TODO(adamcohen): figure out a final effect here. We may need to recommend
// different effects based on device performance. On at least one relatively high-end
// device I've tried, translating the launcher causes things to get quite laggy.
mLauncher.getDragLayer().setTranslationX(transX);
Log.d(BAD_STATE, "Workspace onOverlayScrollChanged DragLayer ALPHA_INDEX_OVERLAY=" + alpha);
mLauncher.getDragLayer().getAlphaProperty(ALPHA_INDEX_OVERLAY).setValue(alpha);
}
/**
* @return false if the callback is still pending
*/
private boolean tryRunOverlayCallback() {
if (mOnOverlayHiddenCallback == null) {
// Return true as no callback is pending. This is used by OnWindowFocusChangeListener
// to remove itself if multiple focus handles were added.
return true;
}
if (mOverlayShown || !hasWindowFocus()) {
return false;
}
mOnOverlayHiddenCallback.run();
mOnOverlayHiddenCallback = null;
return true;
}
/**
* Runs the given callback when the minus one overlay is hidden. Specifically, it is run
* when launcher's window has focus and the overlay is no longer being shown. If a callback
* is already present, the new callback will chain off it so both are run.
*
* @return Whether the callback was deferred.
*/
public boolean runOnOverlayHidden(Runnable callback) {
if (mOnOverlayHiddenCallback == null) {
mOnOverlayHiddenCallback = callback;
} else {
// Chain the new callback onto the previous callback(s).
Runnable oldCallback = mOnOverlayHiddenCallback;
mOnOverlayHiddenCallback = () -> {
oldCallback.run();
callback.run();
};
}
if (!tryRunOverlayCallback()) {
ViewTreeObserver observer = getViewTreeObserver();
if (observer != null && observer.isAlive()) {
observer.addOnWindowFocusChangeListener(
new ViewTreeObserver.OnWindowFocusChangeListener() {
@Override
public void onWindowFocusChanged(boolean hasFocus) {
if (tryRunOverlayCallback() && observer.isAlive()) {
observer.removeOnWindowFocusChangeListener(this);
}
}
});
}
return true;
}
return false;
}
@Override
protected void notifyPageSwitchListener(int prevPage) {
super.notifyPageSwitchListener(prevPage);
if (prevPage != mCurrentPage) {
StatsLogManager.EventEnum event = (prevPage < mCurrentPage)
? LAUNCHER_SWIPERIGHT : LAUNCHER_SWIPELEFT;
mLauncher.getStatsLogManager().logger()
.withSrcState(LAUNCHER_STATE_HOME)
.withDstState(LAUNCHER_STATE_HOME)
.withContainerInfo(LauncherAtom.ContainerInfo.newBuilder()
.setWorkspace(
LauncherAtom.WorkspaceContainer.newBuilder()
.setPageIndex(prevPage)).build())
.log(event);
}
}
protected void setWallpaperDimension() {
Executors.THREAD_POOL_EXECUTOR.execute(new Runnable() {
@Override
public void run() {
final Point size = LauncherAppState.getIDP(getContext()).defaultWallpaperSize;
if (size.x != mWallpaperManager.getDesiredMinimumWidth()
|| size.y != mWallpaperManager.getDesiredMinimumHeight()) {
mWallpaperManager.suggestDesiredDimensions(size.x, size.y);
}
}
});
}
public void lockWallpaperToDefaultPage() {
mWallpaperOffset.setLockToDefaultPage(true);
}
public void unlockWallpaperFromDefaultPageOnNextLayout() {
if (mWallpaperOffset.isLockedToDefaultPage()) {
mUnlockWallpaperFromDefaultPageOnLayout = true;
requestLayout();
}
}
@Override
public void computeScroll() {
super.computeScroll();
mWallpaperOffset.syncWithScroll();
}
@Override
public void announceForAccessibility(CharSequence text) {
// Don't announce if apps is on top of us.
if (!mLauncher.isInState(ALL_APPS)) {
super.announceForAccessibility(text);
}
}
private void updatePageAlphaValues() {
// We need to check the isDragging case because updatePageAlphaValues is called between
// goToState(SPRING_LOADED) and onStartStateTransition.
if (!workspaceInModalState() && !mIsSwitchingState && !mDragController.isDragging()) {
int screenCenter = getScrollX() + getMeasuredWidth() / 2;
for (int i = 0; i < getChildCount(); i++) {
CellLayout child = (CellLayout) getChildAt(i);
if (child != null) {
float scrollProgress = getScrollProgress(screenCenter, child, i);
float alpha = 1 - Math.abs(scrollProgress);
if (mWorkspaceFadeInAdjacentScreens) {
child.getShortcutsAndWidgets().setAlpha(alpha);
} else {
// Pages that are off-screen aren't important for accessibility.
child.getShortcutsAndWidgets().setImportantForAccessibility(
alpha > 0 ? IMPORTANT_FOR_ACCESSIBILITY_AUTO
: IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS);
}
}
}
}
}
private void updatePageScrollValues() {
int screenCenter = getScrollX() + getMeasuredWidth() / 2;
for (int i = 0; i < getChildCount(); i++) {
CellLayout child = (CellLayout) getChildAt(i);
if (child != null) {
float scrollProgress = getScrollProgress(screenCenter, child, i);
child.setScrollProgress(scrollProgress);
}
}
}
protected void onAttachedToWindow() {
super.onAttachedToWindow();
mWallpaperOffset.setWindowToken(getWindowToken());
computeScroll();
}
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
mWallpaperOffset.setWindowToken(null);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (mUnlockWallpaperFromDefaultPageOnLayout) {
mWallpaperOffset.setLockToDefaultPage(false);
mUnlockWallpaperFromDefaultPageOnLayout = false;
}
if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) {
mWallpaperOffset.syncWithScroll();
mWallpaperOffset.jumpToFinal();
}
super.onLayout(changed, left, top, right, bottom);
updatePageAlphaValues();
}
@Override
public int getDescendantFocusability() {
if (workspaceInModalState()) {
return ViewGroup.FOCUS_BLOCK_DESCENDANTS;
}
return super.getDescendantFocusability();
}
private boolean workspaceInModalState() {
return !mLauncher.isInState(NORMAL);
}
private boolean workspaceInScrollableState() {
return mLauncher.isInState(SPRING_LOADED) || !workspaceInModalState();
}
/**
* Returns whether a drag should be allowed to be started from the current workspace state.
*/
public boolean workspaceIconsCanBeDragged() {
return mLauncher.getStateManager().getState().hasFlag(FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED);
}
private void updateChildrenLayersEnabled() {
boolean enableChildrenLayers = mIsSwitchingState || isPageInTransition();
if (enableChildrenLayers != mChildrenLayersEnabled) {
mChildrenLayersEnabled = enableChildrenLayers;
if (mChildrenLayersEnabled) {
enableHwLayersOnVisiblePages();
} else {
for (int i = 0; i < getPageCount(); i++) {
final CellLayout cl = (CellLayout) getChildAt(i);
cl.enableHardwareLayer(false);
}
}
}
}
private void enableHwLayersOnVisiblePages() {
if (mChildrenLayersEnabled) {
final int screenCount = getChildCount();
final int[] visibleScreens = getVisibleChildrenRange();
int leftScreen = visibleScreens[0];
int rightScreen = visibleScreens[1];
if (mForceDrawAdjacentPages) {
// In overview mode, make sure that the two side pages are visible.
leftScreen = Utilities.boundToRange(getCurrentPage() - 1, 0, rightScreen);
rightScreen = Utilities.boundToRange(getCurrentPage() + 1,
leftScreen, getPageCount() - 1);
}
if (leftScreen == rightScreen) {
// make sure we're caching at least two pages always
if (rightScreen < screenCount - 1) {
rightScreen++;
} else if (leftScreen > 0) {
leftScreen--;
}
}
for (int i = 0; i < screenCount; i++) {
final CellLayout layout = (CellLayout) getPageAt(i);
// enable layers between left and right screen inclusive.
boolean enableLayer = leftScreen <= i && i <= rightScreen;
layout.enableHardwareLayer(enableLayer);
}
}
}
public void onWallpaperTap(MotionEvent ev) {
final int[] position = mTempXY;
getLocationOnScreen(position);
int pointerIndex = ev.getActionIndex();
position[0] += (int) ev.getX(pointerIndex);
position[1] += (int) ev.getY(pointerIndex);
mWallpaperManager.sendWallpaperCommand(getWindowToken(),
ev.getAction() == MotionEvent.ACTION_UP
? WallpaperManager.COMMAND_TAP : WallpaperManager.COMMAND_SECONDARY_TAP,
position[0], position[1], 0, null);
}
private void onStartStateTransition() {
mIsSwitchingState = true;
mTransitionProgress = 0;
updateChildrenLayersEnabled();
}
private void onEndStateTransition() {
mIsSwitchingState = false;
mForceDrawAdjacentPages = false;
mTransitionProgress = 1;
updateChildrenLayersEnabled();
updateAccessibilityFlags();
}
/**
* Sets the current workspace {@link LauncherState} and updates the UI without any animations
*/
@Override
public void setState(LauncherState toState) {
onStartStateTransition();
mStateTransitionAnimation.setState(toState);
onEndStateTransition();
}
/**
* Sets the current workspace {@link LauncherState}, then animates the UI
*/
@Override
public void setStateWithAnimation(
LauncherState toState, StateAnimationConfig config, PendingAnimation animation) {
StateTransitionListener listener = new StateTransitionListener();
mStateTransitionAnimation.setStateWithAnimation(toState, config, animation);
// Invalidate the pages now, so that we have the visible pages before the
// animation is started
if (toState.hasFlag(FLAG_MULTI_PAGE)) {
mForceDrawAdjacentPages = true;
}
invalidate(); // This will call dispatchDraw(), which calls getVisiblePages().
ValueAnimator stepAnimator = ValueAnimator.ofFloat(0, 1);
stepAnimator.addUpdateListener(listener);
stepAnimator.addListener(listener);
animation.add(stepAnimator);
}
public WorkspaceStateTransitionAnimation getStateTransitionAnimation() {
return mStateTransitionAnimation;
}
public void updateAccessibilityFlags() {
// TODO: Update the accessibility flags appropriately when dragging.
int accessibilityFlag =
mLauncher.getStateManager().getState().hasFlag(FLAG_WORKSPACE_INACCESSIBLE)
? IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS
: IMPORTANT_FOR_ACCESSIBILITY_AUTO;
if (!mLauncher.getAccessibilityDelegate().isInAccessibleDrag()) {
int total = getPageCount();
for (int i = 0; i < total; i++) {
updateAccessibilityFlags(accessibilityFlag, (CellLayout) getPageAt(i));
}
setImportantForAccessibility(accessibilityFlag);
}
}
@Override
public AccessibilityNodeInfo createAccessibilityNodeInfo() {
if (getImportantForAccessibility() == IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS) {
// TAPL tests verify that workspace is not present in Overview and AllApps states.
// TAPL can work only if UIDevice is set up as setCompressedLayoutHeirarchy(false).
// Hiding workspace from the tests when it's
// IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS.
return AccessibilityNodeInfo.obtain();
}
return super.createAccessibilityNodeInfo();
}
private void updateAccessibilityFlags(int accessibilityFlag, CellLayout page) {
page.setImportantForAccessibility(IMPORTANT_FOR_ACCESSIBILITY_NO);
page.getShortcutsAndWidgets().setImportantForAccessibility(accessibilityFlag);
page.setContentDescription(null);
page.setAccessibilityDelegate(null);
}
public void startDrag(CellLayout.CellInfo cellInfo, DragOptions options) {
View child = cellInfo.cell;
mDragInfo = cellInfo;
child.setVisibility(INVISIBLE);
if (options.isAccessibleDrag) {
mDragController.addDragListener(
new AccessibleDragListenerAdapter(this, WorkspaceAccessibilityHelper::new) {
@Override
protected void enableAccessibleDrag(boolean enable) {
super.enableAccessibleDrag(enable);
setEnableForLayout(mLauncher.getHotseat(), enable);
}
});
}
beginDragShared(child, this, options);
}
public void beginDragShared(View child, DragSource source, DragOptions options) {
Object dragObject = child.getTag();
if (!(dragObject instanceof ItemInfo)) {
String msg = "Drag started with a view that has no tag set. This "
+ "will cause a crash (issue 11627249) down the line. "
+ "View: " + child + " tag: " + child.getTag();
throw new IllegalStateException(msg);
}
beginDragShared(child, null, source, (ItemInfo) dragObject,
new DragPreviewProvider(child), options);
}
/**
* Core functionality for beginning a drag operation for an item that will be dropped within
* the workspace
*/
public DragView beginDragShared(View child, DraggableView draggableView, DragSource source,
ItemInfo dragObject, DragPreviewProvider previewProvider, DragOptions dragOptions) {
float iconScale = 1f;
if (child instanceof BubbleTextView) {
Drawable icon = ((BubbleTextView) child).getIcon();
if (icon instanceof FastBitmapDrawable) {
iconScale = ((FastBitmapDrawable) icon).getAnimatedScale();
}
}
// Clear the pressed state if necessary
child.clearFocus();
child.setPressed(false);
if (child instanceof BubbleTextView) {
BubbleTextView icon = (BubbleTextView) child;
icon.clearPressedBackground();
}
if (draggableView == null && child instanceof DraggableView) {
draggableView = (DraggableView) child;
}
final View contentView = previewProvider.getContentView();
final float scale;
// The draggable drawable follows the touch point around on the screen
final Drawable drawable;
if (contentView == null) {
drawable = previewProvider.createDrawable();
scale = previewProvider.getScaleAndPosition(drawable, mTempXY);
} else {
drawable = null;
scale = previewProvider.getScaleAndPosition(contentView, mTempXY);
}
int halfPadding = previewProvider.previewPadding / 2;
int dragLayerX = mTempXY[0];
int dragLayerY = mTempXY[1];
Point dragVisualizeOffset = null;
Rect dragRect = new Rect();
if (draggableView != null) {
draggableView.getSourceVisualDragBounds(dragRect);
dragLayerY += dragRect.top;
dragVisualizeOffset = new Point(-halfPadding, halfPadding);
}
if (child.getParent() instanceof ShortcutAndWidgetContainer) {
mDragSourceInternal = (ShortcutAndWidgetContainer) child.getParent();
}
if (child instanceof BubbleTextView && !dragOptions.isAccessibleDrag) {
dragOptions.preDragCondition = ((BubbleTextView) child).startLongPressAction();
}
final DragView dv;
if (contentView instanceof View) {
if (contentView instanceof LauncherAppWidgetHostView) {
mDragController.addDragListener(new AppWidgetHostViewDragListener(mLauncher));
}
dv = mDragController.startDrag(
contentView,
draggableView,
dragLayerX,
dragLayerY,
source,
dragObject,
dragVisualizeOffset,
dragRect,
scale * iconScale,
scale,
dragOptions);
} else {
dv = mDragController.startDrag(
drawable,
draggableView,
dragLayerX,
dragLayerY,
source,
dragObject,
dragVisualizeOffset,
dragRect,
scale * iconScale,
scale,
dragOptions);
}
return dv;
}
private boolean transitionStateShouldAllowDrop() {
return (!isSwitchingState() || mTransitionProgress > ALLOW_DROP_TRANSITION_PROGRESS) &&
workspaceIconsCanBeDragged();
}
/**
* {@inheritDoc}
*/
@Override
public boolean acceptDrop(DragObject d) {
// If it's an external drop (e.g. from All Apps), check if it should be accepted
CellLayout dropTargetLayout = mDropToLayout;
if (d.dragSource != this) {
// Don't accept the drop if we're not over a valid drop target at time of drop
if (dropTargetLayout == null) {
return false;
}
if (!transitionStateShouldAllowDrop()) return false;
mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
// We want the point to be mapped to the dragTarget.
mapPointFromDropLayout(dropTargetLayout, mDragViewVisualCenter);
int spanX;
int spanY;
if (mDragInfo != null) {
final CellLayout.CellInfo dragCellInfo = mDragInfo;
spanX = dragCellInfo.spanX;
spanY = dragCellInfo.spanY;
} else {
spanX = d.dragInfo.spanX;
spanY = d.dragInfo.spanY;
}
int minSpanX = spanX;
int minSpanY = spanY;
if (d.dragInfo instanceof PendingAddWidgetInfo) {
minSpanX = ((PendingAddWidgetInfo) d.dragInfo).minSpanX;
minSpanY = ((PendingAddWidgetInfo) d.dragInfo).minSpanY;
}
mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, dropTargetLayout,
mTargetCell);
float distance = dropTargetLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
if (mCreateUserFolderOnDrop && willCreateUserFolder(d.dragInfo,
dropTargetLayout, mTargetCell, distance, true)) {
return true;
}
if (mAddToExistingFolderOnDrop && willAddToExistingUserFolder(d.dragInfo,
dropTargetLayout, mTargetCell, distance)) {
return true;
}
int[] resultSpan = new int[2];
mTargetCell = dropTargetLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
null, mTargetCell, resultSpan, CellLayout.MODE_ACCEPT_DROP);
boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
// Don't accept the drop if there's no room for the item
if (!foundCell) {
onNoCellFound(dropTargetLayout, d.dragInfo, d.logInstanceId);
return false;
}
}
int screenId = getIdForScreen(dropTargetLayout);
if (Workspace.EXTRA_EMPTY_SCREEN_IDS.contains(screenId)) {
commitExtraEmptyScreens();
}
return true;
}
boolean willCreateUserFolder(ItemInfo info, CellLayout target, int[] targetCell,
float distance, boolean considerTimeout) {
if (distance > target.getFolderCreationRadius(targetCell)) return false;
View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
return willCreateUserFolder(info, dropOverView, considerTimeout);
}
boolean willCreateUserFolder(ItemInfo info, View dropOverView, boolean considerTimeout) {
if (dropOverView != null) {
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.cellY)) {
return false;
}
}
boolean hasntMoved = false;
if (mDragInfo != null) {
hasntMoved = dropOverView == mDragInfo.cell;
}
if (dropOverView == null || hasntMoved || (considerTimeout && !mCreateUserFolderOnDrop)) {
return false;
}
boolean aboveShortcut = (dropOverView.getTag() instanceof WorkspaceItemInfo
&& ((WorkspaceItemInfo) dropOverView.getTag()).container
!= LauncherSettings.Favorites.CONTAINER_HOTSEAT_PREDICTION);
boolean willBecomeShortcut =
(info.itemType == ITEM_TYPE_APPLICATION ||
info.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT ||
info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT);
return (aboveShortcut && willBecomeShortcut);
}
boolean willAddToExistingUserFolder(ItemInfo dragInfo, CellLayout target, int[] targetCell,
float distance) {
if (distance > target.getFolderCreationRadius(targetCell)) return false;
View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
return willAddToExistingUserFolder(dragInfo, dropOverView);
}
boolean willAddToExistingUserFolder(ItemInfo dragInfo, View dropOverView) {
if (dropOverView != null) {
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) dropOverView.getLayoutParams();
if (lp.useTmpCoords && (lp.tmpCellX != lp.cellX || lp.tmpCellY != lp.cellY)) {
return false;
}
}
if (dropOverView instanceof FolderIcon) {
FolderIcon fi = (FolderIcon) dropOverView;
if (fi.acceptDrop(dragInfo)) {
return true;
}
}
return false;
}
boolean createUserFolderIfNecessary(View newView, int container, CellLayout target,
int[] targetCell, float distance, boolean external, DragObject d) {
if (distance > target.getFolderCreationRadius(targetCell)) return false;
View v = target.getChildAt(targetCell[0], targetCell[1]);
boolean hasntMoved = false;
if (mDragInfo != null) {
CellLayout cellParent = getParentCellLayoutForView(mDragInfo.cell);
hasntMoved = (mDragInfo.cellX == targetCell[0] &&
mDragInfo.cellY == targetCell[1]) && (cellParent == target);
}
if (v == null || hasntMoved || !mCreateUserFolderOnDrop) return false;
mCreateUserFolderOnDrop = false;
final int screenId = getIdForScreen(target);
boolean aboveShortcut = (v.getTag() instanceof WorkspaceItemInfo);
boolean willBecomeShortcut = (newView.getTag() instanceof WorkspaceItemInfo);
if (aboveShortcut && willBecomeShortcut) {
WorkspaceItemInfo sourceInfo = (WorkspaceItemInfo) newView.getTag();
WorkspaceItemInfo destInfo = (WorkspaceItemInfo) v.getTag();
// if the drag started here, we need to remove it from the workspace
if (!external) {
getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
}
Rect folderLocation = new Rect();
float scale = mLauncher.getDragLayer().getDescendantRectRelativeToSelf(v, folderLocation);
target.removeView(v);
mStatsLogManager.logger().withItemInfo(destInfo).withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_FOLDER_CREATED);
FolderIcon fi = mLauncher.addFolder(target, container, screenId, targetCell[0],
targetCell[1]);
destInfo.cellX = -1;
destInfo.cellY = -1;
sourceInfo.cellX = -1;
sourceInfo.cellY = -1;
// If the dragView is null, we can't animate
boolean animate = d != null;
if (animate) {
// In order to keep everything continuous, we hand off the currently rendered
// folder background to the newly created icon. This preserves animation state.
fi.setFolderBackground(mFolderCreateBg);
mFolderCreateBg = new PreviewBackground();
fi.performCreateAnimation(destInfo, v, sourceInfo, d, folderLocation, scale);
} else {
fi.prepareCreateAnimation(v);
fi.addItem(destInfo);
fi.addItem(sourceInfo);
}
return true;
}
return false;
}
boolean addToExistingFolderIfNecessary(View newView, CellLayout target, int[] targetCell,
float distance, DragObject d, boolean external) {
if (distance > target.getFolderCreationRadius(targetCell)) return false;
View dropOverView = target.getChildAt(targetCell[0], targetCell[1]);
if (!mAddToExistingFolderOnDrop) return false;
mAddToExistingFolderOnDrop = false;
if (dropOverView instanceof FolderIcon) {
FolderIcon fi = (FolderIcon) dropOverView;
if (fi.acceptDrop(d.dragInfo)) {
mStatsLogManager.logger().withItemInfo(fi.mInfo).withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED_ON_FOLDER_ICON);
fi.onDrop(d, false /* itemReturnedOnFailedDrop */);
// if the drag started here, we need to remove it from the workspace
if (!external) {
getParentCellLayoutForView(mDragInfo.cell).removeView(mDragInfo.cell);
}
return true;
}
}
return false;
}
@Override
public void prepareAccessibilityDrop() {
}
@Override
public void onDrop(final DragObject d, DragOptions options) {
mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
CellLayout dropTargetLayout = mDropToLayout;
// We want the point to be mapped to the dragTarget.
if (dropTargetLayout != null) {
mapPointFromDropLayout(dropTargetLayout, mDragViewVisualCenter);
}
boolean droppedOnOriginalCell = false;
boolean snappedToNewPage = false;
boolean resizeOnDrop = false;
Runnable onCompleteRunnable = null;
if (d.dragSource != this || mDragInfo == null) {
final int[] touchXY = new int[]{(int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1]};
onDropExternal(touchXY, dropTargetLayout, d);
} else {
final View cell = mDragInfo.cell;
boolean droppedOnOriginalCellDuringTransition = false;
// by Hogan 实现hotset栏 apk图标固定，不能被替换---start
int drag_container = mDragInfo.container;
if (dropTargetLayout != null && !d.cancelled
&& !mLauncher.isHotseatLayout(dropTargetLayout) && drag_container != -101) {
//if (dropTargetLayout != null && !d.cancelled) {
// by Hogan 实现hotset栏 apk图标固定，不能被替换---end
// Move internally
boolean hasMovedLayouts = (getParentCellLayoutForView(cell) != dropTargetLayout);
boolean hasMovedIntoHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
int container = hasMovedIntoHotseat ?
LauncherSettings.Favorites.CONTAINER_HOTSEAT :
LauncherSettings.Favorites.CONTAINER_DESKTOP;
int screenId = (mTargetCell[0] < 0) ?
mDragInfo.screenId : getIdForScreen(dropTargetLayout);
int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
// First we find the cell nearest to point at which the item is
// dropped, without any consideration to whether there is an item there.
mTargetCell = findNearestArea((int) mDragViewVisualCenter[0], (int)
mDragViewVisualCenter[1], spanX, spanY, dropTargetLayout, mTargetCell);
float distance = dropTargetLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
// If the item being dropped is a shortcut and the nearest drop
// cell also contains a shortcut, then create a folder with the two shortcuts.
if (createUserFolderIfNecessary(cell, container,
dropTargetLayout, mTargetCell, distance, false, d)
|| addToExistingFolderIfNecessary(cell, dropTargetLayout, mTargetCell,
distance, d, false)) {
mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY);
return;
}
// Aside from the special case where we're dropping a shortcut onto a shortcut,
// we need to find the nearest cell location that is vacant
ItemInfo item = d.dragInfo;
int minSpanX = item.spanX;
int minSpanY = item.spanY;
if (item.minSpanX > 0 && item.minSpanY > 0) {
minSpanX = item.minSpanX;
minSpanY = item.minSpanY;
}
droppedOnOriginalCell = item.screenId == screenId && item.container == container
&& item.cellX == mTargetCell[0] && item.cellY == mTargetCell[1];
droppedOnOriginalCellDuringTransition = droppedOnOriginalCell && mIsSwitchingState;
// When quickly moving an item, a user may accidentally rearrange their
// workspace. So instead we move the icon back safely to its original position.
boolean returnToOriginalCellToPreventShuffling = !isFinishedSwitchingState()
&& !droppedOnOriginalCellDuringTransition && !dropTargetLayout
.isRegionVacant(mTargetCell[0], mTargetCell[1], spanX, spanY);
int[] resultSpan = new int[2];
if (returnToOriginalCellToPreventShuffling) {
mTargetCell[0] = mTargetCell[1] = -1;
} else {
mTargetCell = dropTargetLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY, cell,
mTargetCell, resultSpan, CellLayout.MODE_ON_DROP);
}
boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
// if the widget resizes on drop
if (foundCell && (cell instanceof AppWidgetHostView) &&
(resultSpan[0] != item.spanX || resultSpan[1] != item.spanY)) {
resizeOnDrop = true;
item.spanX = resultSpan[0];
item.spanY = resultSpan[1];
AppWidgetHostView awhv = (AppWidgetHostView) cell;
WidgetSizes.updateWidgetSizeRanges(awhv, mLauncher, resultSpan[0],
resultSpan[1]);
}
if (foundCell) {
int targetScreenIndex = getPageIndexForScreenId(screenId);
int snapScreen = getLeftmostVisiblePageForIndex(targetScreenIndex);
// On large screen devices two pages can be shown at the same time, and snap
// isn't needed if the source and target screens appear at the same time
if (snapScreen != mCurrentPage && !hasMovedIntoHotseat) {
snapToPage(snapScreen);
snappedToNewPage = true;
}
final ItemInfo info = (ItemInfo) cell.getTag();
if (hasMovedLayouts) {
// Reparent the view
CellLayout parentCell = getParentCellLayoutForView(cell);
if (parentCell != null) {
parentCell.removeView(cell);
} else if (mDragInfo.cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ false);
} else if (FeatureFlags.IS_STUDIO_BUILD) {
throw new NullPointerException("mDragInfo.cell has null parent");
}
addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
info.spanX, info.spanY);
}
// update the item's position after drop
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
lp.cellX = lp.tmpCellX = mTargetCell[0];
lp.cellY = lp.tmpCellY = mTargetCell[1];
lp.cellHSpan = item.spanX;
lp.cellVSpan = item.spanY;
lp.isLockedToGrid = true;
if (container != LauncherSettings.Favorites.CONTAINER_HOTSEAT &&
cell instanceof LauncherAppWidgetHostView) {
// We post this call so that the widget has a chance to be placed
// in its final location
onCompleteRunnable = getWidgetResizeFrameRunnable(options,
(LauncherAppWidgetHostView) cell, dropTargetLayout);
}
mLauncher.getModelWriter().modifyItemInDatabase(info, container, screenId,
lp.cellX, lp.cellY, item.spanX, item.spanY);
} else {
if (!returnToOriginalCellToPreventShuffling) {
onNoCellFound(dropTargetLayout, d.dragInfo, d.logInstanceId);
}
if (mDragInfo.cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ true);
}
// If we can't find a drop location, we return the item to its original position
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
mTargetCell[0] = lp.cellX;
mTargetCell[1] = lp.cellY;
CellLayout layout = (CellLayout) cell.getParent().getParent();
layout.markCellsAsOccupiedForView(cell);
}
} else {
// When drag is cancelled, reattach content view back to its original parent.
if (cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ true);
final CellLayout cellLayout = getParentCellLayoutForView(cell);
boolean pageIsVisible = isVisible(cellLayout);
if (pageIsVisible) {
onCompleteRunnable = getWidgetResizeFrameRunnable(options,
(LauncherAppWidgetHostView) cell, cellLayout);
}
}
}
final CellLayout parent = (CellLayout) cell.getParent().getParent();
if (d.dragView.hasDrawn()) {
if (droppedOnOriginalCellDuringTransition) {
// Animate the item to its original position, while simultaneously exiting
// spring-loaded mode so the page meets the icon where it was picked up.
final RunnableList callbackList = new RunnableList();
final Runnable onCompleteCallback = onCompleteRunnable;
mLauncher.getDragController().animateDragViewToOriginalPosition(
/* onComplete= */ callbackList::executeAllAndDestroy, cell,
SPRING_LOADED.getTransitionDuration(mLauncher, true /* isToState */));
mLauncher.getStateManager().goToState(NORMAL, /* delay= */ 0,
onCompleteCallback == null
? null
: forSuccessCallback(
() -> callbackList.add(onCompleteCallback)));
mLauncher.getDropTargetBar().onDragEnd();
parent.onDropChild(cell);
return;
}
final ItemInfo info = (ItemInfo) cell.getTag();
boolean isWidget = info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
|| info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
if (isWidget) {
int animationType = resizeOnDrop ? ANIMATE_INTO_POSITION_AND_RESIZE :
ANIMATE_INTO_POSITION_AND_DISAPPEAR;
animateWidgetDrop(info, parent, d.dragView, null, animationType, cell, false);
} else {
int duration = snappedToNewPage ? ADJACENT_SCREEN_DROP_DURATION : -1;
mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
this);
}
} else {
d.deferDragViewCleanupPostAnimation = false;
cell.setVisibility(VISIBLE);
}
parent.onDropChild(cell);
mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY,
onCompleteRunnable == null ? null : forSuccessCallback(onCompleteRunnable));
mStatsLogManager.logger().withItemInfo(d.dragInfo).withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED);
}
if (d.stateAnnouncer != null && !droppedOnOriginalCell) {
d.stateAnnouncer.completeAction(R.string.item_moved);
}
}
@Nullable
private Runnable getWidgetResizeFrameRunnable(DragOptions options,
LauncherAppWidgetHostView hostView, CellLayout cellLayout) {
AppWidgetProviderInfo pInfo = hostView.getAppWidgetInfo();
if (pInfo != null && pInfo.resizeMode != AppWidgetProviderInfo.RESIZE_NONE
&& !options.isAccessibleDrag) {
return () -> {
if (!isPageInTransition()) {
AppWidgetResizeFrame.showForWidget(hostView, cellLayout);
}
};
}
return null;
}
public void onNoCellFound(
View dropTargetLayout, ItemInfo itemInfo, @Nullable InstanceId logInstanceId) {
int strId = mLauncher.isHotseatLayout(dropTargetLayout)
? R.string.hotseat_out_of_space : R.string.out_of_space;
Toast.makeText(mLauncher, mLauncher.getString(strId), Toast.LENGTH_SHORT).show();
StatsLogManager.StatsLogger logger = mStatsLogManager.logger().withItemInfo(itemInfo);
if (logInstanceId != null) {
logger = logger.withInstanceId(logInstanceId);
}
logger.log(LauncherEvent.LAUNCHER_ITEM_DROP_FAILED_INSUFFICIENT_SPACE);
}
/**
* Computes and returns the area relative to dragLayer which is used to display a page.
* In case we have multiple pages displayed at the same time, we return the union of the areas.
*/
public Rect getPageAreaRelativeToDragLayer() {
Rect area = new Rect();
int nextPage = getNextPage();
int panelCount = getPanelCount();
for (int page = nextPage; page < nextPage + panelCount; page++) {
CellLayout child = (CellLayout) getChildAt(page);
if (child == null) {
break;
}
ShortcutAndWidgetContainer boundingLayout = child.getShortcutsAndWidgets();
Rect tmpRect = new Rect();
mLauncher.getDragLayer().getDescendantRectRelativeToSelf(boundingLayout, tmpRect);
area.union(tmpRect);
}
return area;
}
@Override
public void onDragEnter(DragObject d) {
if (ENFORCE_DRAG_EVENT_ORDER) {
enforceDragParity("onDragEnter", 1, 1);
}
mCreateUserFolderOnDrop = false;
mAddToExistingFolderOnDrop = false;
mDropToLayout = null;
mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
setDropLayoutForDragObject(d, mDragViewVisualCenter[0], mDragViewVisualCenter[1]);
}
@Override
public void onDragExit(DragObject d) {
if (ENFORCE_DRAG_EVENT_ORDER) {
enforceDragParity("onDragExit", -1, 0);
}
// Here we store the final page that will be dropped to, if the workspace in fact
// receives the drop
mDropToLayout = mDragTargetLayout;
if (mDragMode == DRAG_MODE_CREATE_FOLDER) {
mCreateUserFolderOnDrop = true;
} else if (mDragMode == DRAG_MODE_ADD_TO_FOLDER) {
mAddToExistingFolderOnDrop = true;
}
// Reset the previous drag target
setCurrentDropLayout(null);
setCurrentDragOverlappingLayout(null);
mSpringLoadedDragController.cancel();
}
private void enforceDragParity(String event, int update, int expectedValue) {
enforceDragParity(this, event, update, expectedValue);
for (int i = 0; i < getChildCount(); i++) {
enforceDragParity(getChildAt(i), event, update, expectedValue);
}
}
private void enforceDragParity(View v, String event, int update, int expectedValue) {
Object tag = v.getTag(R.id.drag_event_parity);
int value = tag == null ? 0 : (Integer) tag;
value += update;
v.setTag(R.id.drag_event_parity, value);
if (value != expectedValue) {
Log.e(TAG, event + ": Drag contract violated: " + value);
}
}
void setCurrentDropLayout(CellLayout layout) {
if (mDragTargetLayout != null) {
mDragTargetLayout.revertTempState();
mDragTargetLayout.onDragExit();
}
mDragTargetLayout = layout;
if (mDragTargetLayout != null) {
mDragTargetLayout.onDragEnter();
}
cleanupReorder(true);
cleanupFolderCreation();
setCurrentDropOverCell(-1, -1);
}
void setCurrentDragOverlappingLayout(CellLayout layout) {
if (mDragOverlappingLayout != null) {
mDragOverlappingLayout.setIsDragOverlapping(false);
}
mDragOverlappingLayout = layout;
if (mDragOverlappingLayout != null) {
mDragOverlappingLayout.setIsDragOverlapping(true);
}
}
public CellLayout getCurrentDragOverlappingLayout() {
return mDragOverlappingLayout;
}
void setCurrentDropOverCell(int x, int y) {
if (x != mDragOverX || y != mDragOverY) {
mDragOverX = x;
mDragOverY = y;
setDragMode(DRAG_MODE_NONE);
}
}
void setDragMode(int dragMode) {
if (dragMode != mDragMode) {
if (dragMode == DRAG_MODE_NONE) {
cleanupAddToFolder();
// We don't want to cancel the re-order alarm every time the target cell changes
// as this feels to slow / unresponsive.
cleanupReorder(false);
cleanupFolderCreation();
} else if (dragMode == DRAG_MODE_ADD_TO_FOLDER) {
cleanupReorder(true);
cleanupFolderCreation();
} else if (dragMode == DRAG_MODE_CREATE_FOLDER) {
cleanupAddToFolder();
cleanupReorder(true);
} else if (dragMode == DRAG_MODE_REORDER) {
cleanupAddToFolder();
cleanupFolderCreation();
}
mDragMode = dragMode;
}
}
private void cleanupFolderCreation() {
if (mFolderCreateBg != null) {
mFolderCreateBg.animateToRest();
}
}
private void cleanupAddToFolder() {
if (mDragOverFolderIcon != null) {
mDragOverFolderIcon.onDragExit();
mDragOverFolderIcon = null;
}
}
private void cleanupReorder(boolean cancelAlarm) {
// Any pending reorders are canceled
if (cancelAlarm) {
mReorderAlarm.cancelAlarm();
}
mLastReorderX = -1;
mLastReorderY = -1;
}
/*
*
* Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's
* coordinate space. The argument xy is modified with the return result.
*/
private void mapPointFromSelfToChild(View v, float[] xy) {
xy[0] = xy[0] - v.getLeft();
xy[1] = xy[1] - v.getTop();
}
/**
* Updates the point in {@param xy} to point to the co-ordinate space of {@param layout}
*
* @param layout either hotseat of a page in workspace
* @param xy the point location in workspace co-ordinate space
*/
private void mapPointFromDropLayout(CellLayout layout, float[] xy) {
if (mLauncher.isHotseatLayout(layout)) {
mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(this, xy, true);
mLauncher.getDragLayer().mapCoordInSelfToDescendant(layout, xy);
} else {
mapPointFromSelfToChild(layout, xy);
}
}
private boolean isDragWidget(DragObject d) {
return (d.dragInfo instanceof LauncherAppWidgetInfo ||
d.dragInfo instanceof PendingAddWidgetInfo);
}
public void onDragOver(DragObject d) {
// Skip drag over events while we are dragging over side pages
if (!transitionStateShouldAllowDrop()) return;
ItemInfo item = d.dragInfo;
if (item == null) {
if (FeatureFlags.IS_STUDIO_BUILD) {
throw new NullPointerException("DragObject has null info");
}
return;
}
// Ensure that we have proper spans for the item that we are dropping
if (item.spanX < 0 || item.spanY < 0) throw new RuntimeException("Improper spans found");
mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
final View child = (mDragInfo == null) ? null : mDragInfo.cell;
if (setDropLayoutForDragObject(d, mDragViewVisualCenter[0], mDragViewVisualCenter[1])) {
if (mDragTargetLayout == null || mLauncher.isHotseatLayout(mDragTargetLayout)) {
mSpringLoadedDragController.cancel();
} else {
mSpringLoadedDragController.setAlarm(mDragTargetLayout);
}
}
// Handle the drag over
if (mDragTargetLayout != null) {
// We want the point to be mapped to the dragTarget.
mapPointFromDropLayout(mDragTargetLayout, mDragViewVisualCenter);
int minSpanX = item.spanX;
int minSpanY = item.spanY;
if (item.minSpanX > 0 && item.minSpanY > 0) {
minSpanX = item.minSpanX;
minSpanY = item.minSpanY;
}
mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY,
mDragTargetLayout, mTargetCell);
int reorderX = mTargetCell[0];
int reorderY = mTargetCell[1];
setCurrentDropOverCell(mTargetCell[0], mTargetCell[1]);
float targetCellDistance = mDragTargetLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
manageFolderFeedback(targetCellDistance, d);
boolean nearestDropOccupied = mDragTargetLayout.isNearestDropLocationOccupied((int)
mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1], item.spanX,
item.spanY, child, mTargetCell);
if (!nearestDropOccupied) {
mDragTargetLayout.visualizeDropLocation(mTargetCell[0], mTargetCell[1],
item.spanX, item.spanY, d);
} else if ((mDragMode == DRAG_MODE_NONE || mDragMode == DRAG_MODE_REORDER)
&& !mReorderAlarm.alarmPending()
&& (mLastReorderX != reorderX || mLastReorderY != reorderY)
&& targetCellDistance < mDragTargetLayout.getReorderRadius(mTargetCell)) {
int[] resultSpan = new int[2];
mDragTargetLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, item.spanX, item.spanY,
child, mTargetCell, resultSpan, CellLayout.MODE_SHOW_REORDER_HINT);
// Otherwise, if we aren't adding to or creating a folder and there's no pending
// reorder, then we schedule a reorder
ReorderAlarmListener listener = new ReorderAlarmListener(mDragViewVisualCenter,
minSpanX, minSpanY, item.spanX, item.spanY, d, child);
mReorderAlarm.setOnAlarmListener(listener);
mReorderAlarm.setAlarm(REORDER_TIMEOUT);
}
if (mDragMode == DRAG_MODE_CREATE_FOLDER || mDragMode == DRAG_MODE_ADD_TO_FOLDER ||
!nearestDropOccupied) {
if (mDragTargetLayout != null) {
mDragTargetLayout.revertTempState();
}
}
}
}
/**
* Updates {@link #mDragTargetLayout} and {@link #mDragOverlappingLayout}
* based on the DragObject's position.
*
* The layout will be:
* - The Hotseat if the drag object is over it
* - A side page if we are in spring-loaded mode and the drag object is over it
* - The current page otherwise
*
* @return whether the layout is different from the current {@link #mDragTargetLayout}.
*/
private boolean setDropLayoutForDragObject(DragObject d, float centerX, float centerY) {
CellLayout layout = null;
if (shouldUseHotseatAsDropLayout(d)) {
layout = mLauncher.getHotseat();
} else if (!isDragObjectOverSmartSpace(d)) {
// If the object is over qsb/smartspace, we don't want to highlight anything.
// Check neighbour pages
layout = checkDragObjectIsOverNeighbourPages(d, centerX);
if (layout == null) {
// Check visible pages
IntSet visiblePageIndices = getVisiblePageIndices();
for (int visiblePageIndex : visiblePageIndices) {
layout = verifyInsidePage(visiblePageIndex, d.x, d.y);
if (layout != null) break;
}
}
}
// Update the current drop layout if the target changed
if (layout != mDragTargetLayout) {
setCurrentDropLayout(layout);
setCurrentDragOverlappingLayout(layout);
return true;
}
return false;
}
private boolean shouldUseHotseatAsDropLayout(DragObject dragObject) {
if (mLauncher.getHotseat() == null
|| mLauncher.getHotseat().getShortcutsAndWidgets() == null
|| isDragWidget(dragObject)) {
return false;
}
View hotseatShortcuts = mLauncher.getHotseat().getShortcutsAndWidgets();
getViewBoundsRelativeToWorkspace(hotseatShortcuts, mTempRect);
return mTempRect.contains(dragObject.x, dragObject.y);
}
private boolean isDragObjectOverSmartSpace(DragObject dragObject) {
if (mQsb == null) {
return false;
}
getViewBoundsRelativeToWorkspace(mQsb, mTempRect);
return mTempRect.contains(dragObject.x, dragObject.y);
}
private CellLayout checkDragObjectIsOverNeighbourPages(DragObject d, float centerX) {
if (isPageInTransition()) {
return null;
}
// Check the workspace pages whether the object is over any of them
// Note, centerX represents the center of the object that is being dragged, visually.
// d.x represents the location of the finger within the dragged item.
float touchX;
float touchY = d.y;
// Go through the pages and check if the dragged item is inside one of them. This block
// is responsible for determining whether we need to snap to a different screen.
int nextPage = getNextPage();
IntSet pageIndexesToVerify = IntSet.wrap(nextPage - 1,
nextPage + (isTwoPanelEnabled() ? 2 : 1));
for (int pageIndex : pageIndexesToVerify) {
// When deciding whether to perform a page switch, we need to consider the most
// extreme X coordinate between the finger location and the center of the object
// being dragged. This is either the max or the min of the two depending on whether
// dragging to the left / right, respectively.
touchX = (((pageIndex < nextPage) && !mIsRtl) || (pageIndex > nextPage && mIsRtl))
? Math.min(d.x, centerX) : Math.max(d.x, centerX);
CellLayout layout = verifyInsidePage(pageIndex, touchX, touchY);
if (layout != null) {
return layout;
}
}
return null;
}
/**
* Gets the given view's bounds relative to Workspace
*/
private void getViewBoundsRelativeToWorkspace(View view, Rect outRect) {
mLauncher.getDragLayer()
.getDescendantRectRelativeToSelf(view, mTempRect);
// map draglayer relative bounds to workspace
mLauncher.getDragLayer().mapRectInSelfToDescendant(this, mTempRect);
outRect.set(mTempRect);
}
/**
* Returns the child CellLayout if the point is inside the page coordinates, null otherwise.
*/
private CellLayout verifyInsidePage(int pageNo, float x, float y) {
if (pageNo >= 0 && pageNo < getPageCount()) {
CellLayout cl = (CellLayout) getChildAt(pageNo);
if (x >= cl.getLeft() && x <= cl.getRight()
&& y >= cl.getTop() && y <= cl.getBottom()) {
// This point is inside the cell layout
return cl;
}
}
return null;
}
private void manageFolderFeedback(float distance, DragObject dragObject) {
if (distance > mDragTargetLayout.getFolderCreationRadius(mTargetCell)) {
if ((mDragMode == DRAG_MODE_ADD_TO_FOLDER
|| mDragMode == DRAG_MODE_CREATE_FOLDER)) {
setDragMode(DRAG_MODE_NONE);
}
return;
}
final View dragOverView = mDragTargetLayout.getChildAt(mTargetCell[0], mTargetCell[1]);
ItemInfo info = dragObject.dragInfo;
boolean userFolderPending = willCreateUserFolder(info, dragOverView, false);
if (mDragMode == DRAG_MODE_NONE && userFolderPending) {
mFolderCreateBg = new PreviewBackground();
mFolderCreateBg.setup(mLauncher, mLauncher, null,
dragOverView.getMeasuredWidth(), dragOverView.getPaddingTop());
// The full preview background should appear behind the icon
mFolderCreateBg.isClipping = false;
mFolderCreateBg.animateToAccept(mDragTargetLayout, mTargetCell[0], mTargetCell[1]);
mDragTargetLayout.clearDragOutlines();
setDragMode(DRAG_MODE_CREATE_FOLDER);
if (dragObject.stateAnnouncer != null) {
dragObject.stateAnnouncer.announce(WorkspaceAccessibilityHelper
.getDescriptionForDropOver(dragOverView, getContext()));
}
return;
}
boolean willAddToFolder = willAddToExistingUserFolder(info, dragOverView);
if (willAddToFolder && mDragMode == DRAG_MODE_NONE) {
mDragOverFolderIcon = ((FolderIcon) dragOverView);
mDragOverFolderIcon.onDragEnter(info);
if (mDragTargetLayout != null) {
mDragTargetLayout.clearDragOutlines();
}
setDragMode(DRAG_MODE_ADD_TO_FOLDER);
if (dragObject.stateAnnouncer != null) {
dragObject.stateAnnouncer.announce(WorkspaceAccessibilityHelper
.getDescriptionForDropOver(dragOverView, getContext()));
}
return;
}
if (mDragMode == DRAG_MODE_ADD_TO_FOLDER && !willAddToFolder) {
setDragMode(DRAG_MODE_NONE);
}
if (mDragMode == DRAG_MODE_CREATE_FOLDER && !userFolderPending) {
setDragMode(DRAG_MODE_NONE);
}
}
class ReorderAlarmListener implements OnAlarmListener {
final float[] dragViewCenter;
final int minSpanX, minSpanY, spanX, spanY;
final DragObject dragObject;
final View child;
public ReorderAlarmListener(float[] dragViewCenter, int minSpanX, int minSpanY, int spanX,
int spanY, DragObject dragObject, View child) {
this.dragViewCenter = dragViewCenter;
this.minSpanX = minSpanX;
this.minSpanY = minSpanY;
this.spanX = spanX;
this.spanY = spanY;
this.child = child;
this.dragObject = dragObject;
}
public void onAlarm(Alarm alarm) {
int[] resultSpan = new int[2];
mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, mDragTargetLayout,
mTargetCell);
mLastReorderX = mTargetCell[0];
mLastReorderY = mTargetCell[1];
mTargetCell = mDragTargetLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY,
child, mTargetCell, resultSpan, CellLayout.MODE_DRAG_OVER);
if (mTargetCell[0] < 0 || mTargetCell[1] < 0) {
mDragTargetLayout.revertTempState();
} else {
setDragMode(DRAG_MODE_REORDER);
}
boolean resize = resultSpan[0] != spanX || resultSpan[1] != spanY;
mDragTargetLayout.visualizeDropLocation(mTargetCell[0], mTargetCell[1],
resultSpan[0], resultSpan[1], dragObject);
}
}
@Override
public void getHitRectRelativeToDragLayer(Rect outRect) {
// We want the workspace to have the whole area of the display (it will find the correct
// cell layout to drop to in the existing drag/drop logic.
mLauncher.getDragLayer().getDescendantRectRelativeToSelf(this, outRect);
}
/**
* Drop an item that didn't originate on one of the workspace screens.
* It may have come from Launcher (e.g. from all apps or customize), or it may have
* come from another app altogether.
*
* NOTE: This can also be called when we are outside of a drag event, when we want
* to add an item to one of the workspace screens.
*/
private void onDropExternal(final int[] touchXY, final CellLayout cellLayout, DragObject d) {
if (d.dragInfo instanceof PendingAddShortcutInfo) {
WorkspaceItemInfo si = ((PendingAddShortcutInfo) d.dragInfo)
.activityInfo.createWorkspaceItemInfo();
if (si != null) {
d.dragInfo = si;
}
}
ItemInfo info = d.dragInfo;
int spanX = info.spanX;
int spanY = info.spanY;
if (mDragInfo != null) {
spanX = mDragInfo.spanX;
spanY = mDragInfo.spanY;
}
final int container = mLauncher.isHotseatLayout(cellLayout)
? LauncherSettings.Favorites.CONTAINER_HOTSEAT
: LauncherSettings.Favorites.CONTAINER_DESKTOP;
final int screenId = getIdForScreen(cellLayout);
if (!mLauncher.isHotseatLayout(cellLayout)
&& screenId != getScreenIdForPageIndex(mCurrentPage)
&& !mLauncher.isInState(SPRING_LOADED)) {
snapToPage(getPageIndexForScreenId(screenId));
}
if (info instanceof PendingAddItemInfo) {
final PendingAddItemInfo pendingInfo = (PendingAddItemInfo) info;
boolean findNearestVacantCell = true;
if (pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
mTargetCell = findNearestArea(touchXY[0], touchXY[1], spanX, spanY,
cellLayout, mTargetCell);
float distance = cellLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
if (willCreateUserFolder(d.dragInfo, cellLayout, mTargetCell, distance, true)
|| willAddToExistingUserFolder(
d.dragInfo, cellLayout, mTargetCell, distance)) {
findNearestVacantCell = false;
}
}
final ItemInfo item = d.dragInfo;
boolean updateWidgetSize = false;
if (findNearestVacantCell) {
int minSpanX = item.spanX;
int minSpanY = item.spanY;
if (item.minSpanX > 0 && item.minSpanY > 0) {
minSpanX = item.minSpanX;
minSpanY = item.minSpanY;
}
int[] resultSpan = new int[2];
mTargetCell = cellLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, info.spanX, info.spanY,
null, mTargetCell, resultSpan, CellLayout.MODE_ON_DROP_EXTERNAL);
if (resultSpan[0] != item.spanX || resultSpan[1] != item.spanY) {
updateWidgetSize = true;
}
item.spanX = resultSpan[0];
item.spanY = resultSpan[1];
}
Runnable onAnimationCompleteRunnable = new Runnable() {
@Override
public void run() {
// Normally removeExtraEmptyScreen is called in Workspace#onDrop, but when
// adding an item that may not be dropped right away (due to a config activity)
// we defer the removal until the activity returns.
deferRemoveExtraEmptyScreen();
// When dragging and dropping from customization tray, we deal with creating
// widgets/shortcuts/folders in a slightly different way
mLauncher.addPendingItem(pendingInfo, container, screenId, mTargetCell,
item.spanX, item.spanY);
mStatsLogManager.logger().withItemInfo(d.dragInfo)
.withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED);
}
};
boolean isWidget = pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
|| pendingInfo.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
AppWidgetHostView finalView = isWidget ?
((PendingAddWidgetInfo) pendingInfo).boundWidget : null;
if (finalView != null && updateWidgetSize) {
WidgetSizes.updateWidgetSizeRanges(finalView, mLauncher, item.spanX, item.spanY);
}
int animationStyle = ANIMATE_INTO_POSITION_AND_DISAPPEAR;
if (isWidget && ((PendingAddWidgetInfo) pendingInfo).info != null &&
((PendingAddWidgetInfo) pendingInfo).getHandler().needsConfigure()) {
animationStyle = ANIMATE_INTO_POSITION_AND_REMAIN;
}
animateWidgetDrop(info, cellLayout, d.dragView, onAnimationCompleteRunnable,
animationStyle, finalView, true);
} else {
// This is for other drag/drop cases, like dragging from All Apps
mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY);
View view;
switch (info.itemType) {
case ITEM_TYPE_APPLICATION:
case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT:
case LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT:
case LauncherSettings.Favorites.ITEM_TYPE_SEARCH_ACTION:
if (info instanceof WorkspaceItemFactory) {
// Came from all apps -- make a copy
info = ((WorkspaceItemFactory) info).makeWorkspaceItem(mLauncher);
d.dragInfo = info;
}
if (info instanceof WorkspaceItemInfo
&& info.container == LauncherSettings.Favorites.CONTAINER_PREDICTION) {
// Came from all apps prediction row -- make a copy
info = new WorkspaceItemInfo((WorkspaceItemInfo) info);
d.dragInfo = info;
}
view = mLauncher.createShortcut(cellLayout, (WorkspaceItemInfo) info);
break;
case LauncherSettings.Favorites.ITEM_TYPE_FOLDER:
view = FolderIcon.inflateFolderAndIcon(R.layout.folder_icon, mLauncher, cellLayout,
(FolderInfo) info);
break;
default:
throw new IllegalStateException("Unknown item type: " + info.itemType);
}
// First we find the cell nearest to point at which the item is
// dropped, without any consideration to whether there is an item there.
if (touchXY != null) {
mTargetCell = findNearestArea(touchXY[0], touchXY[1], spanX, spanY,
cellLayout, mTargetCell);
float distance = cellLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
if (createUserFolderIfNecessary(view, container, cellLayout, mTargetCell, distance,
true, d)) {
return;
}
if (addToExistingFolderIfNecessary(view, cellLayout, mTargetCell, distance, d,
true)) {
return;
}
}
if (touchXY != null) {
// when dragging and dropping, just find the closest free spot
mTargetCell = cellLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], 1, 1, 1, 1,
null, mTargetCell, null, CellLayout.MODE_ON_DROP_EXTERNAL);
} else {
cellLayout.findCellForSpan(mTargetCell, 1, 1);
}
// Add the item to DB before adding to screen ensures that the container and other
// values of the info is properly updated.
mLauncher.getModelWriter().addOrMoveItemInDatabase(info, container, screenId,
mTargetCell[0], mTargetCell[1]);
addInScreen(view, container, screenId, mTargetCell[0], mTargetCell[1],
info.spanX, info.spanY);
cellLayout.onDropChild(view);
cellLayout.getShortcutsAndWidgets().measureChild(view);
if (d.dragView != null) {
// We wrap the animation call in the temporary set and reset of the current
// cellLayout to its final transform -- this means we animate the drag view to
// the correct final location.
setFinalTransitionTransform();
mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, view, this);
resetTransitionTransform();
}
mStatsLogManager.logger().withItemInfo(d.dragInfo).withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED);
}
}
private Drawable createWidgetDrawable(ItemInfo widgetInfo, View layout) {
int[] unScaledSize = estimateItemSize(widgetInfo);
int visibility = layout.getVisibility();
layout.setVisibility(VISIBLE);
int width = MeasureSpec.makeMeasureSpec(unScaledSize[0], MeasureSpec.EXACTLY);
int height = MeasureSpec.makeMeasureSpec(unScaledSize[1], MeasureSpec.EXACTLY);
layout.measure(width, height);
layout.layout(0, 0, unScaledSize[0], unScaledSize[1]);
Bitmap b = BitmapRenderer.createHardwareBitmap(
unScaledSize[0], unScaledSize[1], layout::draw);
layout.setVisibility(visibility);
return new FastBitmapDrawable(b);
}
private void getFinalPositionForDropAnimation(int[] loc, float[] scaleXY,
DragView dragView, CellLayout layout, ItemInfo info, int[] targetCell, boolean scale,
final View finalView) {
// Now we animate the dragView, (ie. the widget or shortcut preview) into its final
// location and size on the home screen.
int spanX = info.spanX;
int spanY = info.spanY;
Rect r = estimateItemPosition(layout, targetCell[0], targetCell[1], spanX, spanY);
if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET) {
DeviceProfile profile = mLauncher.getDeviceProfile();
if (profile.shouldInsetWidgets() && finalView instanceof NavigableAppWidgetHostView) {
Rect widgetPadding = new Rect();
((NavigableAppWidgetHostView) finalView).getWidgetInset(profile, widgetPadding);
r.left -= widgetPadding.left;
r.right += widgetPadding.right;
r.top -= widgetPadding.top;
r.bottom += widgetPadding.bottom;
}
Utilities.shrinkRect(r, profile.appWidgetScale.x, profile.appWidgetScale.y);
}
mTempFXY[0] = r.left;
mTempFXY[1] = r.top;
setFinalTransitionTransform();
float cellLayoutScale =
mLauncher.getDragLayer().getDescendantCoordRelativeToSelf(layout, mTempFXY, true);
resetTransitionTransform();
Utilities.roundArray(mTempFXY, loc);
if (scale) {
float dragViewScaleX = (1.0f * r.width()) / dragView.getMeasuredWidth();
float dragViewScaleY = (1.0f * r.height()) / dragView.getMeasuredHeight();
// The animation will scale the dragView about its center, so we need to center about
// the final location.
loc[0] -= (dragView.getMeasuredWidth() - cellLayoutScale * r.width()) / 2
- Math.ceil(layout.getUnusedHorizontalSpace() / 2f);
loc[1] -= (dragView.getMeasuredHeight() - cellLayoutScale * r.height()) / 2;
scaleXY[0] = dragViewScaleX * cellLayoutScale;
scaleXY[1] = dragViewScaleY * cellLayoutScale;
} else {
// Since we are not cross-fading the dragView, align the drag view to the
// final cell position.
float dragScale = dragView.getInitialScale() * cellLayoutScale;
loc[0] += (dragScale - 1) * dragView.getWidth() / 2;
loc[1] += (dragScale - 1) * dragView.getHeight() / 2;
scaleXY[0] = scaleXY[1] = dragScale;
// If a dragRegion was provided, offset the final position accordingly.
Rect dragRegion = dragView.getDragRegion();
if (dragRegion != null) {
loc[0] += cellLayoutScale * dragRegion.left;
loc[1] += cellLayoutScale * dragRegion.top;
}
}
}
public void animateWidgetDrop(ItemInfo info, CellLayout cellLayout, final DragView dragView,
final Runnable onCompleteRunnable, int animationType, final View finalView,
boolean external) {
int[] finalPos = new int[2];
float scaleXY[] = new float[2];
boolean scalePreview = !(info instanceof PendingAddShortcutInfo);
getFinalPositionForDropAnimation(finalPos, scaleXY, dragView, cellLayout, info, mTargetCell,
scalePreview, finalView);
Resources res = mLauncher.getResources();
final int duration = res.getInteger(R.integer.config_dropAnimMaxDuration) - 200;
boolean isWidget = info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET ||
info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
if ((animationType == ANIMATE_INTO_POSITION_AND_RESIZE || external)
&& finalView != null
&& dragView.getContentView() != finalView) {
Drawable crossFadeDrawable = createWidgetDrawable(info, finalView);
dragView.crossFadeContent(crossFadeDrawable, (int) (duration * 0.8f));
} else if (isWidget && external) {
scaleXY[0] = scaleXY[1] = Math.min(scaleXY[0], scaleXY[1]);
}
DragLayer dragLayer = mLauncher.getDragLayer();
if (animationType == CANCEL_TWO_STAGE_WIDGET_DROP_ANIMATION) {
mLauncher.getDragLayer().animateViewIntoPosition(dragView, finalPos, 0f, 0.1f, 0.1f,
DragLayer.ANIMATION_END_DISAPPEAR, onCompleteRunnable, duration);
} else {
int endStyle;
if (animationType == ANIMATE_INTO_POSITION_AND_REMAIN) {
endStyle = DragLayer.ANIMATION_END_REMAIN_VISIBLE;
} else {
endStyle = DragLayer.ANIMATION_END_DISAPPEAR;
}
Runnable onComplete = new Runnable() {
@Override
public void run() {
if (finalView != null) {
finalView.setVisibility(VISIBLE);
}
if (onCompleteRunnable != null) {
onCompleteRunnable.run();
}
}
};
dragLayer.animateViewIntoPosition(dragView, finalPos[0],
finalPos[1], 1, scaleXY[0], scaleXY[1], onComplete, endStyle,
duration, this);
}
}
public void setFinalTransitionTransform() {
if (isSwitchingState()) {
mCurrentScale = getScaleX();
setScaleX(mStateTransitionAnimation.getFinalScale());
setScaleY(mStateTransitionAnimation.getFinalScale());
}
}
public void resetTransitionTransform() {
if (isSwitchingState()) {
setScaleX(mCurrentScale);
setScaleY(mCurrentScale);
}
}
/**
* Return the current CellInfo describing our current drag; this method exists
* so that Launcher can sync this object with the correct info when the activity is created/
* destroyed
*/
public CellLayout.CellInfo getDragInfo() {
return mDragInfo;
}
/**
* Calculate the nearest cell where the given object would be dropped.
*
* pixelX and pixelY should be in the coordinate system of layout
*/
@Thunk
int[] findNearestArea(int pixelX, int pixelY,
int spanX, int spanY, CellLayout layout, int[] recycle) {
return layout.findNearestArea(
pixelX, pixelY, spanX, spanY, recycle);
}
void setup(DragController dragController) {
mSpringLoadedDragController = new SpringLoadedDragController(mLauncher);
mDragController = dragController;
// hardware layers on children are enabled on startup, but should be disabled until
// needed
updateChildrenLayersEnabled();
}
/**
* Called at the end of a drag which originated on the workspace.
*/
public void onDropCompleted(final View target, final DragObject d,
final boolean success) {
if (success) {
if (target != this && mDragInfo != null) {
removeWorkspaceItem(mDragInfo.cell);
}
} else if (mDragInfo != null) {
// When drag is cancelled, reattach content view back to its original parent.
if (mDragInfo.cell instanceof LauncherAppWidgetHostView && d.dragView != null) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ true);
}
final CellLayout cellLayout = mLauncher.getCellLayout(
mDragInfo.container, mDragInfo.screenId);
if (cellLayout != null) {
cellLayout.onDropChild(mDragInfo.cell);
} else if (FeatureFlags.IS_STUDIO_BUILD) {
throw new RuntimeException("Invalid state: cellLayout == null in "
+ "Workspace#onDropCompleted. Please file a bug. ");
}
}
View cell = getHomescreenIconByItemId(d.originalDragInfo.id);
if (d.cancelled && cell != null) {
cell.setVisibility(VISIBLE);
}
mDragInfo = null;
}
/**
* For opposite operation. See {@link #addInScreen}.
*/
public void removeWorkspaceItem(View v) {
CellLayout parentCell = getParentCellLayoutForView(v);
if (parentCell != null) {
parentCell.removeView(v);
} else if (FeatureFlags.IS_STUDIO_BUILD) {
// When an app is uninstalled using the drop target, we wait until resume to remove
// the icon. We also remove all the corresponding items from the workspace at
// {@link Launcher#bindComponentsRemoved}. That call can come before or after
// {@link Launcher#mOnResumeCallbacks} depending on how busy the worker thread is.
Log.e(TAG, "mDragInfo.cell has null parent");
}
if (v instanceof DropTarget) {
mDragController.removeDropTarget((DropTarget) v);
}
}
/**
* Removed widget from workspace by appWidgetId
*
* @param appWidgetId
*/
public void removeWidget(int appWidgetId) {
mapOverItems((info, view) -> {
if (info instanceof LauncherAppWidgetInfo) {
LauncherAppWidgetInfo appWidgetInfo = (LauncherAppWidgetInfo) info;
if (appWidgetInfo.appWidgetId == appWidgetId) {
mLauncher.removeItem(view, appWidgetInfo, true,
"widget is removed in response to widget remove broadcast");
return true;
}
}
return false;
});
}
/**
* Removes all folder listeners
*/
public void removeFolderListeners() {
mapOverItems(new ItemOperator() {
@Override
public boolean evaluate(ItemInfo info, View view) {
if (view instanceof FolderIcon) {
((FolderIcon) view).removeListeners();
}
return false;
}
});
}
public boolean isDropEnabled() {
return true;
}
@Override
protected void dispatchRestoreInstanceState(SparseArray container) {
// We don't dispatch restoreInstanceState to our children using this code path.
// Some pages will be restored immediately as their items are bound immediately, and
// others we will need to wait until after their items are bound.
mSavedStates = container;
}
public void restoreInstanceStateForChild(int child) {
if (mSavedStates != null) {
mRestoredPages.add(child);
CellLayout cl = (CellLayout) getChildAt(child);
if (cl != null) {
cl.restoreInstanceState(mSavedStates);
}
}
}
public void restoreInstanceStateForRemainingPages() {
int count = getChildCount();
for (int i = 0; i < count; i++) {
if (!mRestoredPages.contains(i)) {
restoreInstanceStateForChild(i);
}
}
mRestoredPages.clear();
mSavedStates = null;
}
@Override
public boolean scrollLeft() {
boolean result = false;
if (!mIsSwitchingState && workspaceInScrollableState()) {
result = super.scrollLeft();
}
Folder openFolder = Folder.getOpen(mLauncher);
if (openFolder != null) {
openFolder.completeDragExit();
}
return result;
}
@Override
public boolean scrollRight() {
boolean result = false;
if (!mIsSwitchingState && workspaceInScrollableState()) {
result = super.scrollRight();
}
Folder openFolder = Folder.getOpen(mLauncher);
if (openFolder != null) {
openFolder.completeDragExit();
}
return result;
}
/**
* Returns a specific CellLayout
*/
CellLayout getParentCellLayoutForView(View v) {
for (CellLayout layout : getWorkspaceAndHotseatCellLayouts()) {
if (layout.getShortcutsAndWidgets().indexOfChild(v) > -1) {
return layout;
}
}
return null;
}
/**
* Returns a list of all the CellLayouts on the Homescreen.
*/
private CellLayout[] getWorkspaceAndHotseatCellLayouts() {
int screenCount = getChildCount();
final CellLayout[] layouts;
if (mLauncher.getHotseat() != null) {
layouts = new CellLayout[screenCount + 1];
layouts[screenCount] = mLauncher.getHotseat();
} else {
layouts = new CellLayout[screenCount];
}
for (int screen = 0; screen < screenCount; screen++) {
layouts[screen] = (CellLayout) getChildAt(screen);
}
return layouts;
}
public View getHomescreenIconByItemId(final int id) {
return getFirstMatch((info, v) -> info != null && info.id == id);
}
public LauncherAppWidgetHostView getWidgetForAppWidgetId(final int appWidgetId) {
return (LauncherAppWidgetHostView) getFirstMatch((info, v) ->
(info instanceof LauncherAppWidgetInfo) &&
((LauncherAppWidgetInfo) info).appWidgetId == appWidgetId);
}
public View getFirstMatch(final ItemOperator operator) {
final View[] value = new View[1];
mapOverItems(new ItemOperator() {
@Override
public boolean evaluate(ItemInfo info, View v) {
if (operator.evaluate(info, v)) {
value[0] = v;
return true;
}
return false;
}
});
return value[0];
}
void clearDropTargets() {
mapOverItems(new ItemOperator() {
@Override
public boolean evaluate(ItemInfo info, View v) {
if (v instanceof DropTarget) {
mDragController.removeDropTarget((DropTarget) v);
}
// not done, process all the shortcuts
return false;
}
});
}
/**
* Removes items that match the {@param matcher}. When applications are removed
* as a part of an update, this is called to ensure that other widgets and application
* shortcuts are not removed.
*/
public void removeItemsByMatcher(final Predicate matcher) {
for (CellLayout layout : getWorkspaceAndHotseatCellLayouts()) {
ShortcutAndWidgetContainer container = layout.getShortcutsAndWidgets();
// Iterate in reverse order as we are removing items
for (int i = container.getChildCount() - 1; i >= 0; i--) {
View child = container.getChildAt(i);
ItemInfo info = (ItemInfo) child.getTag();
if (matcher.test(info)) {
layout.removeViewInLayout(child);
if (child instanceof DropTarget) {
mDragController.removeDropTarget((DropTarget) child);
}
} else if (child instanceof FolderIcon) {
FolderInfo folderInfo = (FolderInfo) info;
List matches = folderInfo.contents.stream()
.filter(matcher)
.collect(Collectors.toList());
if (!matches.isEmpty()) {
folderInfo.removeAll(matches, false);
if (((FolderIcon) child).getFolder().isOpen()) {
((FolderIcon) child).getFolder().close(false /* animate */);
}
}
}
}
}
// Strip all the empty screens
stripEmptyScreens();
}
@Override
public void mapOverItems(ItemOperator op) {
for (CellLayout layout : getWorkspaceAndHotseatCellLayouts()) {
if (mapOverCellLayout(layout, op) != null) {
return;
}
}
}
/**
* Perform {param operator} over all the items in a given {param layout}.
*
* @return The first item that satisfies the operator or null.
*/
public View mapOverCellLayout(CellLayout layout, ItemOperator operator) {
// TODO(b/128460496) Potential race condition where layout is not yet loaded
if (layout == null) {
return null;
}
ShortcutAndWidgetContainer container = layout.getShortcutsAndWidgets();
// map over all the shortcuts on the workspace
final int itemCount = container.getChildCount();
for (int itemIdx = 0; itemIdx < itemCount; itemIdx++) {
View item = container.getChildAt(itemIdx);
if (operator.evaluate((ItemInfo) item.getTag(), item)) {
return item;
}
}
return null;
}
public void updateNotificationDots(Predicate updatedDots) {
final PackageUserKey packageUserKey = new PackageUserKey(null, null);
Predicate matcher = info -> !packageUserKey.updateFromItemInfo(info)
|| updatedDots.test(packageUserKey);
ItemOperator op = (info, v) -> {
if (info instanceof WorkspaceItemInfo && v instanceof BubbleTextView) {
if (matcher.test(info)) {
((BubbleTextView) v).applyDotState(info, true /* animate */);
}
} else if (info instanceof FolderInfo && v instanceof FolderIcon) {
FolderInfo fi = (FolderInfo) info;
if (fi.contents.stream().anyMatch(matcher)) {
FolderDotInfo folderDotInfo = new FolderDotInfo();
for (WorkspaceItemInfo si : fi.contents) {
folderDotInfo.addDotInfo(mLauncher.getDotInfoForItem(si));
}
((FolderIcon) v).setDotInfo(folderDotInfo);
}
}
// process all the shortcuts
return false;
};
mapOverItems(op);
Folder folder = Folder.getOpen(mLauncher);
if (folder != null) {
folder.iterateOverItems(op);
}
}
/**
* Remove workspace icons & widget information related to items in matcher.
*
* @param matcher the matcher generated by the caller.
*/
public void persistRemoveItemsByMatcher(Predicate matcher,
@Nullable final String reason) {
mLauncher.getModelWriter().deleteItemsFromDatabase(matcher, reason);
removeItemsByMatcher(matcher);
}
public void widgetsRestored(final ArrayList changedInfo) {
if (!changedInfo.isEmpty()) {
DeferredWidgetRefresh widgetRefresh = new DeferredWidgetRefresh(changedInfo,
mLauncher.getAppWidgetHost());
LauncherAppWidgetInfo item = changedInfo.get(0);
final AppWidgetProviderInfo widgetInfo;
WidgetManagerHelper widgetHelper = new WidgetManagerHelper(getContext());
if (item.hasRestoreFlag(LauncherAppWidgetInfo.FLAG_ID_NOT_VALID)) {
widgetInfo = widgetHelper.findProvider(item.providerName, item.user);
} else {
widgetInfo = widgetHelper.getLauncherAppWidgetInfo(item.appWidgetId);
}
if (widgetInfo != null) {
// Re-inflate the widgets which have changed status
widgetRefresh.run();
} else {
// widgetRefresh will automatically run when the packages are updated.
// For now just update the progress bars
mapOverItems(new ItemOperator() {
@Override
public boolean evaluate(ItemInfo info, View view) {
if (view instanceof PendingAppWidgetHostView
&& changedInfo.contains(info)) {
((LauncherAppWidgetInfo) info).installProgress = 100;
((PendingAppWidgetHostView) view).applyState();
}
// process all the shortcuts
return false;
}
});
}
}
}
public boolean isOverlayShown() {
return mOverlayShown;
}
/**
* Calls {@link #snapToPage(int)} on the {@link #DEFAULT_PAGE}, then requests focus on it.
*/
public void moveToDefaultScreen() {
int page = DEFAULT_PAGE;
if (!workspaceInModalState() && getNextPage() != page) {
snapToPage(page);
}
View child = getChildAt(page);
if (child != null) {
child.requestFocus();
}
}
/**
* Set the given view's pivot point to match the workspace's, so that it scales together. Since
* both this view and workspace can move, transform the point manually instead of using
* dragLayer.getDescendantCoordRelativeToSelf and related methods.
*/
public void setPivotToScaleWithSelf(View sibling) {
sibling.setPivotY(getPivotY() + getTop()
- sibling.getTop() - sibling.getTranslationY());
sibling.setPivotX(getPivotX() + getLeft()
- sibling.getLeft() - sibling.getTranslationX());
}
@Override
public int getExpectedHeight() {
return getMeasuredHeight() <= 0 || !mIsLayoutValid
? mLauncher.getDeviceProfile().heightPx : getMeasuredHeight();
}
@Override
public int getExpectedWidth() {
return getMeasuredWidth() <= 0 || !mIsLayoutValid
? mLauncher.getDeviceProfile().widthPx : getMeasuredWidth();
}
@Override
protected boolean canAnnouncePageDescription() {
// Disable announcements while overscrolling potentially to overlay screen because if we end
// up on the overlay screen, it will take care of announcing itself.
return Float.compare(mOverlayTranslation, 0f) == 0;
}
@Override
protected String getCurrentPageDescription() {
int page = (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
return getPageDescription(page);
}
private String getPageDescription(int page) {
int nScreens = getChildCount();
int extraScreenId = mScreenOrder.indexOf(EXTRA_EMPTY_SCREEN_ID);
if (extraScreenId >= 0 && nScreens > 1) {
if (page == extraScreenId) {
return getContext().getString(R.string.workspace_new_page);
}
nScreens--;
}
if (nScreens == 0) {
// When the workspace is not loaded, we do not know how many screen will be bound.
return getContext().getString(R.string.home_screen);
}
int panelCount = getPanelCount();
int currentPage = (page / panelCount) + 1;
int totalPages = nScreens / panelCount + nScreens % panelCount;
return getContext().getString(R.string.workspace_scroll_format, currentPage, totalPages);
}
@Override
protected boolean isSignificantMove(float absoluteDelta, int pageOrientedSize) {
DeviceProfile deviceProfile = mLauncher.getDeviceProfile();
if (!deviceProfile.isTablet) {
return super.isSignificantMove(absoluteDelta, pageOrientedSize);
}
return absoluteDelta
> deviceProfile.availableWidthPx * SIGNIFICANT_MOVE_SCREEN_WIDTH_PERCENTAGE;
}
/**
* Used as a workaround to ensure that the AppWidgetService receives the
* PACKAGE_ADDED broadcast before updating widgets.
*/
private class DeferredWidgetRefresh implements Runnable, ProviderChangedListener {
private final ArrayList mInfos;
private final LauncherAppWidgetHost mHost;
private final Handler mHandler;
private boolean mRefreshPending;
DeferredWidgetRefresh(ArrayList infos,
LauncherAppWidgetHost host) {
mInfos = infos;
mHost = host;
mHandler = mLauncher.mHandler;
mRefreshPending = true;
mHost.addProviderChangeListener(this);
// Force refresh after 10 seconds, if we don't get the provider changed event.
// This could happen when the provider is no longer available in the app.
Message msg = Message.obtain(mHandler, this);
msg.obj = DeferredWidgetRefresh.class;
mHandler.sendMessageDelayed(msg, 10000);
}
@Override
public void run() {
mHost.removeProviderChangeListener(this);
mHandler.removeCallbacks(this);
if (!mRefreshPending) {
return;
}
mRefreshPending = false;
ArrayList views = new ArrayList<>(mInfos.size());
mapOverItems((info, view) -> {
if (view instanceof PendingAppWidgetHostView && mInfos.contains(info)) {
views.add((PendingAppWidgetHostView) view);
}
// process all children
return false;
});
for (PendingAppWidgetHostView view : views) {
view.reInflate();
}
}
@Override
public void notifyWidgetProvidersChanged() {
run();
}
}
private class StateTransitionListener extends AnimatorListenerAdapter
implements AnimatorUpdateListener {
@Override
public void onAnimationUpdate(ValueAnimator anim) {
mTransitionProgress = anim.getAnimatedFraction();
}
@Override
public void onAnimationStart(Animator animation) {
onStartStateTransition();
}
@Override
public void onAnimationEnd(Animator animation) {
onEndStateTransition();
}
}
}
在这里找到onDrop(),加上我们的逻辑：
@Override
public void onDrop(final DragObject d, DragOptions options) {
mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);
CellLayout dropTargetLayout = mDropToLayout;
// We want the point to be mapped to the dragTarget.
if (dropTargetLayout != null) {
mapPointFromDropLayout(dropTargetLayout, mDragViewVisualCenter);
}
boolean droppedOnOriginalCell = false;
boolean snappedToNewPage = false;
boolean resizeOnDrop = false;
Runnable onCompleteRunnable = null;
if (d.dragSource != this || mDragInfo == null) {
final int[] touchXY = new int[]{(int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1]};
onDropExternal(touchXY, dropTargetLayout, d);
} else {
final View cell = mDragInfo.cell;
boolean droppedOnOriginalCellDuringTransition = false;
// by Hogan 实现hotset栏 apk图标固定，不能被替换---start
int drag_container = mDragInfo.container;
if (dropTargetLayout != null && !d.cancelled
&& !mLauncher.isHotseatLayout(dropTargetLayout) && drag_container != -101) {
//if (dropTargetLayout != null && !d.cancelled) {
// by Hogan 实现hotset栏 apk图标固定，不能被替换---end
// Move internally
boolean hasMovedLayouts = (getParentCellLayoutForView(cell) != dropTargetLayout);
boolean hasMovedIntoHotseat = mLauncher.isHotseatLayout(dropTargetLayout);
int container = hasMovedIntoHotseat ?
LauncherSettings.Favorites.CONTAINER_HOTSEAT :
LauncherSettings.Favorites.CONTAINER_DESKTOP;
int screenId = (mTargetCell[0] < 0) ?
mDragInfo.screenId : getIdForScreen(dropTargetLayout);
int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
// First we find the cell nearest to point at which the item is
// dropped, without any consideration to whether there is an item there.
mTargetCell = findNearestArea((int) mDragViewVisualCenter[0], (int)
mDragViewVisualCenter[1], spanX, spanY, dropTargetLayout, mTargetCell);
float distance = dropTargetLayout.getDistanceFromWorkspaceCellVisualCenter(
mDragViewVisualCenter[0], mDragViewVisualCenter[1], mTargetCell);
// If the item being dropped is a shortcut and the nearest drop
// cell also contains a shortcut, then create a folder with the two shortcuts.
if (createUserFolderIfNecessary(cell, container,
dropTargetLayout, mTargetCell, distance, false, d)
|| addToExistingFolderIfNecessary(cell, dropTargetLayout, mTargetCell,
distance, d, false)) {
mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY);
return;
}
// Aside from the special case where we're dropping a shortcut onto a shortcut,
// we need to find the nearest cell location that is vacant
ItemInfo item = d.dragInfo;
int minSpanX = item.spanX;
int minSpanY = item.spanY;
if (item.minSpanX > 0 && item.minSpanY > 0) {
minSpanX = item.minSpanX;
minSpanY = item.minSpanY;
}
droppedOnOriginalCell = item.screenId == screenId && item.container == container
&& item.cellX == mTargetCell[0] && item.cellY == mTargetCell[1];
droppedOnOriginalCellDuringTransition = droppedOnOriginalCell && mIsSwitchingState;
// When quickly moving an item, a user may accidentally rearrange their
// workspace. So instead we move the icon back safely to its original position.
boolean returnToOriginalCellToPreventShuffling = !isFinishedSwitchingState()
&& !droppedOnOriginalCellDuringTransition && !dropTargetLayout
.isRegionVacant(mTargetCell[0], mTargetCell[1], spanX, spanY);
int[] resultSpan = new int[2];
if (returnToOriginalCellToPreventShuffling) {
mTargetCell[0] = mTargetCell[1] = -1;
} else {
mTargetCell = dropTargetLayout.performReorder((int) mDragViewVisualCenter[0],
(int) mDragViewVisualCenter[1], minSpanX, minSpanY, spanX, spanY, cell,
mTargetCell, resultSpan, CellLayout.MODE_ON_DROP);
}
boolean foundCell = mTargetCell[0] >= 0 && mTargetCell[1] >= 0;
// if the widget resizes on drop
if (foundCell && (cell instanceof AppWidgetHostView) &&
(resultSpan[0] != item.spanX || resultSpan[1] != item.spanY)) {
resizeOnDrop = true;
item.spanX = resultSpan[0];
item.spanY = resultSpan[1];
AppWidgetHostView awhv = (AppWidgetHostView) cell;
WidgetSizes.updateWidgetSizeRanges(awhv, mLauncher, resultSpan[0],
resultSpan[1]);
}
if (foundCell) {
int targetScreenIndex = getPageIndexForScreenId(screenId);
int snapScreen = getLeftmostVisiblePageForIndex(targetScreenIndex);
// On large screen devices two pages can be shown at the same time, and snap
// isn't needed if the source and target screens appear at the same time
if (snapScreen != mCurrentPage && !hasMovedIntoHotseat) {
snapToPage(snapScreen);
snappedToNewPage = true;
}
final ItemInfo info = (ItemInfo) cell.getTag();
if (hasMovedLayouts) {
// Reparent the view
CellLayout parentCell = getParentCellLayoutForView(cell);
if (parentCell != null) {
parentCell.removeView(cell);
} else if (mDragInfo.cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ false);
} else if (FeatureFlags.IS_STUDIO_BUILD) {
throw new NullPointerException("mDragInfo.cell has null parent");
}
addInScreen(cell, container, screenId, mTargetCell[0], mTargetCell[1],
info.spanX, info.spanY);
}
// update the item's position after drop
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
lp.cellX = lp.tmpCellX = mTargetCell[0];
lp.cellY = lp.tmpCellY = mTargetCell[1];
lp.cellHSpan = item.spanX;
lp.cellVSpan = item.spanY;
lp.isLockedToGrid = true;
if (container != LauncherSettings.Favorites.CONTAINER_HOTSEAT &&
cell instanceof LauncherAppWidgetHostView) {
// We post this call so that the widget has a chance to be placed
// in its final location
onCompleteRunnable = getWidgetResizeFrameRunnable(options,
(LauncherAppWidgetHostView) cell, dropTargetLayout);
}
mLauncher.getModelWriter().modifyItemInDatabase(info, container, screenId,
lp.cellX, lp.cellY, item.spanX, item.spanY);
} else {
if (!returnToOriginalCellToPreventShuffling) {
onNoCellFound(dropTargetLayout, d.dragInfo, d.logInstanceId);
}
if (mDragInfo.cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ true);
}
// If we can't find a drop location, we return the item to its original position
CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams();
mTargetCell[0] = lp.cellX;
mTargetCell[1] = lp.cellY;
CellLayout layout = (CellLayout) cell.getParent().getParent();
layout.markCellsAsOccupiedForView(cell);
}
} else {
// When drag is cancelled, reattach content view back to its original parent.
if (cell instanceof LauncherAppWidgetHostView) {
d.dragView.detachContentView(/* reattachToPreviousParent= */ true);
final CellLayout cellLayout = getParentCellLayoutForView(cell);
boolean pageIsVisible = isVisible(cellLayout);
if (pageIsVisible) {
onCompleteRunnable = getWidgetResizeFrameRunnable(options,
(LauncherAppWidgetHostView) cell, cellLayout);
}
}
}
final CellLayout parent = (CellLayout) cell.getParent().getParent();
if (d.dragView.hasDrawn()) {
if (droppedOnOriginalCellDuringTransition) {
// Animate the item to its original position, while simultaneously exiting
// spring-loaded mode so the page meets the icon where it was picked up.
final RunnableList callbackList = new RunnableList();
final Runnable onCompleteCallback = onCompleteRunnable;
mLauncher.getDragController().animateDragViewToOriginalPosition(
/* onComplete= */ callbackList::executeAllAndDestroy, cell,
SPRING_LOADED.getTransitionDuration(mLauncher, true /* isToState */));
mLauncher.getStateManager().goToState(NORMAL, /* delay= */ 0,
onCompleteCallback == null
? null
: forSuccessCallback(
() -> callbackList.add(onCompleteCallback)));
mLauncher.getDropTargetBar().onDragEnd();
parent.onDropChild(cell);
return;
}
final ItemInfo info = (ItemInfo) cell.getTag();
boolean isWidget = info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET
|| info.itemType == LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
if (isWidget) {
int animationType = resizeOnDrop ? ANIMATE_INTO_POSITION_AND_RESIZE :
ANIMATE_INTO_POSITION_AND_DISAPPEAR;
animateWidgetDrop(info, parent, d.dragView, null, animationType, cell, false);
} else {
int duration = snappedToNewPage ? ADJACENT_SCREEN_DROP_DURATION : -1;
mLauncher.getDragLayer().animateViewIntoPosition(d.dragView, cell, duration,
this);
}
} else {
d.deferDragViewCleanupPostAnimation = false;
cell.setVisibility(VISIBLE);
}
parent.onDropChild(cell);
mLauncher.getStateManager().goToState(NORMAL, SPRING_LOADED_EXIT_DELAY,
onCompleteRunnable == null ? null : forSuccessCallback(onCompleteRunnable));
mStatsLogManager.logger().withItemInfo(d.dragInfo).withInstanceId(d.logInstanceId)
.log(LauncherEvent.LAUNCHER_ITEM_DROP_COMPLETED);
}
if (d.stateAnnouncer != null && !droppedOnOriginalCell) {
d.stateAnnouncer.completeAction(R.string.item_moved);
}
}
标红的代码就是我们修改的可以实现功能 。
4 完成业务效果图
锁定Hotseat栏演示