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/*
* 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.userevent.nano.LauncherLogProto.Action.Touch.TAP;
import static com.android.launcher3.userevent.nano.LauncherLogProto.ControlType.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.LoggerUtils;
import com.android.launcher3.model.ModelWriter;
import com.android.launcher3.userevent.nano.LauncherLogProto.ControlType;
import com.android.launcher3.userevent.nano.LauncherLogProto.Target;
import com.android.launcher3.views.Snackbar;
public class DeleteDropTarget extends ButtonDropTarget {
private int mControlType = ControlType.DEFAULT_CONTROLTYPE;
public DeleteDropTarget(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DeleteDropTarget(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
// Get the hover color
mHoverColor = getResources().getColor(R.color.delete_target_hover_tint);
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 info.screenId >= 0;
}
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) {
mControlType = item.id != ItemInfo.NO_ID ? ControlType.REMOVE_TARGET
: ControlType.CANCEL_TARGET;
}
@Override
public void onDrop(DragObject d, DragOptions options) {
if (canRemove(d.dragInfo)) {
mLauncher.getModelWriter().prepareToUndoDelete();
}
super.onDrop(d, options);
}
@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 = () -> {
modelWriter.abortDelete(itemPage);
mLauncher.getUserEventDispatcher().logActionOnControl(TAP, 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));
}
@Override
public Target getDropTargetForLogging() {
Target t = LoggerUtils.newTarget(Target.Type.CONTROL);
t.controlType = mControlType;
return t;
}
}
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