| /* |
| * Copyright (C) 2014 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.systemui.statusbar.policy; |
| |
| import android.content.Context; |
| import android.view.accessibility.AccessibilityManager; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| |
| public class AccessibilityController implements |
| AccessibilityManager.AccessibilityStateChangeListener, |
| AccessibilityManager.TouchExplorationStateChangeListener { |
| |
| private final ArrayList<AccessibilityStateChangedCallback> mChangeCallbacks = new ArrayList<>(); |
| |
| private boolean mAccessibilityEnabled; |
| private boolean mTouchExplorationEnabled; |
| |
| public AccessibilityController(Context context) { |
| AccessibilityManager am = |
| (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE); |
| am.addTouchExplorationStateChangeListener(this); |
| am.addAccessibilityStateChangeListener(this); |
| mAccessibilityEnabled = am.isEnabled(); |
| mTouchExplorationEnabled = am.isTouchExplorationEnabled(); |
| } |
| |
| public boolean isAccessibilityEnabled() { |
| return mAccessibilityEnabled; |
| } |
| |
| public boolean isTouchExplorationEnabled() { |
| return mTouchExplorationEnabled; |
| } |
| |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println("AccessibilityController state:"); |
| pw.print(" mAccessibilityEnabled="); pw.println(mAccessibilityEnabled); |
| pw.print(" mTouchExplorationEnabled="); pw.println(mTouchExplorationEnabled); |
| } |
| |
| public void addStateChangedCallback(AccessibilityStateChangedCallback cb) { |
| mChangeCallbacks.add(cb); |
| cb.onStateChanged(mAccessibilityEnabled, mTouchExplorationEnabled); |
| } |
| |
| public void removeStateChangedCallback(AccessibilityStateChangedCallback cb) { |
| mChangeCallbacks.remove(cb); |
| } |
| |
| private void fireChanged() { |
| final int N = mChangeCallbacks.size(); |
| for (int i = 0; i < N; i++) { |
| mChangeCallbacks.get(i).onStateChanged(mAccessibilityEnabled, mTouchExplorationEnabled); |
| } |
| } |
| |
| @Override |
| public void onAccessibilityStateChanged(boolean enabled) { |
| mAccessibilityEnabled = enabled; |
| fireChanged(); |
| } |
| |
| @Override |
| public void onTouchExplorationStateChanged(boolean enabled) { |
| mTouchExplorationEnabled = enabled; |
| fireChanged(); |
| } |
| |
| public interface AccessibilityStateChangedCallback { |
| void onStateChanged(boolean accessibilityEnabled, boolean touchExplorationEnabled); |
| } |
| } |