/*
* Copyright (C) 2021 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 androidx.constraintlayout.core.widgets;
import androidx.constraintlayout.core.widgets.analyzer.Grouping;
import androidx.constraintlayout.core.widgets.analyzer.WidgetGroup;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
/**
* HelperWidget class
*/
public class HelperWidget extends ConstraintWidget implements Helper {
public ConstraintWidget[] mWidgets = new ConstraintWidget[4];
public int mWidgetsCount = 0;
@Override
public void updateConstraints(ConstraintWidgetContainer container) {
// nothing here
}
/**
* Add a widget to the helper
*
* @param widget a widget
*/
@Override
public void add(ConstraintWidget widget) {
if (widget == this || widget == null) {
return;
}
if (mWidgetsCount + 1 > mWidgets.length) {
mWidgets = Arrays.copyOf(mWidgets, mWidgets.length * 2);
}
mWidgets[mWidgetsCount] = widget;
mWidgetsCount++;
}
@Override
public void copy(ConstraintWidget src, HashMap<ConstraintWidget, ConstraintWidget> map) {
super.copy(src, map);
HelperWidget srcHelper = (HelperWidget) src;
mWidgetsCount = 0;
final int count = srcHelper.mWidgetsCount;
for (int i = 0; i < count; i++) {
add(map.get(srcHelper.mWidgets[i]));
}
}
/**
* Reset the widgets list contained by this helper
*/
@Override
public void removeAllIds() {
mWidgetsCount = 0;
Arrays.fill(mWidgets, null);
}
// @TODO: add description
public void addDependents(ArrayList<WidgetGroup> dependencyLists,
int orientation,
WidgetGroup group) {
for (int i = 0; i < mWidgetsCount; i++) {
ConstraintWidget widget = mWidgets[i];
group.add(widget);
}
for (int i = 0; i < mWidgetsCount; i++) {
ConstraintWidget widget = mWidgets[i];
Grouping.findDependents(widget, orientation, dependencyLists, group);
}
}
// @TODO: add description
public int findGroupInDependents(int orientation) {
for (int i = 0; i < mWidgetsCount; i++) {
ConstraintWidget widget = mWidgets[i];
if (orientation == HORIZONTAL && widget.horizontalGroup != -1) {
return widget.horizontalGroup;
}
if (orientation == VERTICAL && widget.verticalGroup != -1) {
return widget.verticalGroup;
}
}
return -1;
}
}