/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wm;
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import android.graphics.Rect;
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import android.graphics.Region;
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import android.util.SparseArray;
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/**
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* A holder that contains a collection of regions identified by int id. Each individual region can
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* be updated separately.
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*/
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class TapExcludeRegionHolder {
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private SparseArray<Region> mTapExcludeRegions = new SparseArray<>();
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/** Update the specified region with provided position and size. */
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void updateRegion(int regionId, Region region) {
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// Remove the previous one because there is a new one incoming.
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mTapExcludeRegions.remove(regionId);
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if (region == null || region.isEmpty()) {
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// The incoming region is invalid. Don't use it.
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return;
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}
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mTapExcludeRegions.put(regionId, region);
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}
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/**
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* Union the provided region with current region formed by this container.
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*/
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void amendRegion(Region region, Rect bounds) {
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for (int i = mTapExcludeRegions.size() - 1; i >= 0; --i) {
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final Region r = mTapExcludeRegions.valueAt(i);
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if (bounds != null) {
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r.op(bounds, Region.Op.INTERSECT);
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}
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region.op(r, Region.Op.UNION);
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}
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}
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}
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