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/*
* Copyright (C) 2019 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 android.view.accessibility;
import android.view.View;
/** @hide */
public final class AccessibilityNodeIdManager {
private WeakSparseArray<View> mIdsToViews = new WeakSparseArray<View>();
private static AccessibilityNodeIdManager sIdManager;
/**
* Gets singleton.
* @return The instance.
*/
public static synchronized AccessibilityNodeIdManager getInstance() {
if (sIdManager == null) {
sIdManager = new AccessibilityNodeIdManager();
}
return sIdManager;
}
private AccessibilityNodeIdManager() {
}
/**
* Register view to be kept track of by the accessibility system.
* Must be paired with unregisterView, otherwise this will leak.
* @param view The view to be registered.
* @param id The accessibilityViewId of the view.
*/
public void registerViewWithId(View view, int id) {
synchronized (mIdsToViews) {
mIdsToViews.append(id, view);
}
}
/**
* Unregister view, accessibility won't keep track of this view after this call.
* @param id The id returned from registerView when the view as first associated.
*/
public void unregisterViewWithId(int id) {
synchronized (mIdsToViews) {
mIdsToViews.remove(id);
}
}
/**
* Accessibility uses this to find the view in the hierarchy.
* @param id The accessibility view id.
* @return The view.
*/
public View findView(int id) {
View view = null;
synchronized (mIdsToViews) {
view = mIdsToViews.get(id);
}
return view != null && view.includeForAccessibility() ? view : null;
}
}
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