| /* |
| * Copyright (C) 2011 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.logging.StatsLogManager.LauncherEvent.LAUNCHER_ITEM_DROPPED_ON_CANCEL; |
| import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_ITEM_DROPPED_ON_REMOVE; |
| import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_UNDO; |
| |
| import android.content.Context; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.view.View; |
| |
| import com.android.launcher3.accessibility.LauncherAccessibilityDelegate; |
| import com.android.launcher3.dragndrop.DragOptions; |
| import com.android.launcher3.logging.StatsLogManager; |
| import com.android.launcher3.model.ModelWriter; |
| 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.WorkspaceItemInfo; |
| import com.android.launcher3.views.Snackbar; |
| |
| public class DeleteDropTarget extends ButtonDropTarget { |
| |
| private final StatsLogManager mStatsLogManager; |
| |
| private StatsLogManager.LauncherEvent mLauncherEvent; |
| |
| public DeleteDropTarget(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| this.mStatsLogManager = StatsLogManager.newInstance(context); |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| setDrawable(R.drawable.ic_remove_shadow); |
| } |
| |
| @Override |
| public void onDragStart(DropTarget.DragObject dragObject, DragOptions options) { |
| super.onDragStart(dragObject, options); |
| setTextBasedOnDragSource(dragObject.dragInfo); |
| setControlTypeBasedOnDragSource(dragObject.dragInfo); |
| } |
| |
| /** |
| * @return true for items that should have a "Remove" action in accessibility. |
| */ |
| @Override |
| public boolean supportsAccessibilityDrop(ItemInfo info, View view) { |
| if (info instanceof WorkspaceItemInfo) { |
| // Support the action unless the item is in a context menu. |
| return canRemove(info); |
| } |
| |
| return (info instanceof LauncherAppWidgetInfo) |
| || (info instanceof FolderInfo); |
| } |
| |
| @Override |
| public int getAccessibilityAction() { |
| return LauncherAccessibilityDelegate.REMOVE; |
| } |
| |
| @Override |
| protected boolean supportsDrop(ItemInfo info) { |
| return true; |
| } |
| |
| /** |
| * Set the drop target's text to either "Remove" or "Cancel" depending on the drag item. |
| */ |
| private void setTextBasedOnDragSource(ItemInfo item) { |
| if (!TextUtils.isEmpty(mText)) { |
| mText = getResources().getString(canRemove(item) |
| ? R.string.remove_drop_target_label |
| : android.R.string.cancel); |
| setContentDescription(mText); |
| requestLayout(); |
| } |
| } |
| |
| private boolean canRemove(ItemInfo item) { |
| return item.id != ItemInfo.NO_ID; |
| } |
| |
| /** |
| * Set mControlType depending on the drag item. |
| */ |
| private void setControlTypeBasedOnDragSource(ItemInfo item) { |
| mLauncherEvent = item.id != ItemInfo.NO_ID ? LAUNCHER_ITEM_DROPPED_ON_REMOVE |
| : LAUNCHER_ITEM_DROPPED_ON_CANCEL; |
| } |
| |
| @Override |
| public void onDrop(DragObject d, DragOptions options) { |
| if (canRemove(d.dragInfo)) { |
| mLauncher.getModelWriter().prepareToUndoDelete(); |
| d.dragInfo.container = NO_ID; |
| } |
| super.onDrop(d, options); |
| mStatsLogManager.logger().withInstanceId(d.logInstanceId) |
| .log(mLauncherEvent); |
| } |
| |
| @Override |
| public void completeDrop(DragObject d) { |
| ItemInfo item = d.dragInfo; |
| if (canRemove(item)) { |
| int itemPage = mLauncher.getWorkspace().getCurrentPage(); |
| onAccessibilityDrop(null, item); |
| ModelWriter modelWriter = mLauncher.getModelWriter(); |
| Runnable onUndoClicked = () -> { |
| mLauncher.setPageToBindSynchronously(itemPage); |
| modelWriter.abortDelete(); |
| mLauncher.getStatsLogManager().logger().log(LAUNCHER_UNDO); |
| }; |
| Snackbar.show(mLauncher, R.string.item_removed, R.string.undo, |
| modelWriter::commitDelete, onUndoClicked); |
| } |
| } |
| |
| /** |
| * Removes the item from the workspace. If the view is not null, it also removes the view. |
| */ |
| @Override |
| public void onAccessibilityDrop(View view, ItemInfo item) { |
| // Remove the item from launcher and the db, we can ignore the containerInfo in this call |
| // because we already remove the drag view from the folder (if the drag originated from |
| // a folder) in Folder.beginDrag() |
| mLauncher.removeItem(view, item, true /* deleteFromDb */); |
| mLauncher.getWorkspace().stripEmptyScreens(); |
| mLauncher.getDragLayer() |
| .announceForAccessibility(getContext().getString(R.string.item_removed)); |
| } |
| } |