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/*
* 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 com.android.systemui.accessibility.floatingmenu;
import static android.provider.Settings.Secure.ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU;
import android.content.Context;
import android.os.UserHandle;
import android.text.TextUtils;
import androidx.annotation.MainThread;
import com.android.internal.annotations.VisibleForTesting;
import com.android.keyguard.KeyguardUpdateMonitor;
import com.android.keyguard.KeyguardUpdateMonitorCallback;
import com.android.systemui.accessibility.AccessibilityButtonModeObserver;
import com.android.systemui.accessibility.AccessibilityButtonModeObserver.AccessibilityButtonMode;
import com.android.systemui.accessibility.AccessibilityButtonTargetsObserver;
import com.android.systemui.dagger.SysUISingleton;
import javax.inject.Inject;
/** A controller to handle the lifecycle of accessibility floating menu. */
@MainThread
@SysUISingleton
public class AccessibilityFloatingMenuController implements
AccessibilityButtonModeObserver.ModeChangedListener,
AccessibilityButtonTargetsObserver.TargetsChangedListener {
private final AccessibilityButtonModeObserver mAccessibilityButtonModeObserver;
private final AccessibilityButtonTargetsObserver mAccessibilityButtonTargetsObserver;
private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
private Context mContext;
@VisibleForTesting
IAccessibilityFloatingMenu mFloatingMenu;
private int mBtnMode;
private String mBtnTargets;
private boolean mIsKeyguardVisible;
private boolean mIsAccessibilityManagerServiceReady;
@VisibleForTesting
final KeyguardUpdateMonitorCallback mKeyguardCallback = new KeyguardUpdateMonitorCallback() {
// Accessibility floating menu needs to retrieve information from
// AccessibilityManagerService, and it would be ready before onUserUnlocked().
@Override
public void onUserUnlocked() {
mIsAccessibilityManagerServiceReady = true;
handleFloatingMenuVisibility(mIsKeyguardVisible, mBtnMode, mBtnTargets);
}
// Keyguard state would be changed before AccessibilityManagerService is ready to retrieve,
// need to wait until receive onUserUnlocked().
@Override
public void onKeyguardVisibilityChanged(boolean showing) {
mIsKeyguardVisible = showing;
if (mIsAccessibilityManagerServiceReady) {
handleFloatingMenuVisibility(mIsKeyguardVisible, mBtnMode, mBtnTargets);
}
}
@Override
public void onUserSwitching(int userId) {
destroyFloatingMenu();
}
@Override
public void onUserSwitchComplete(int userId) {
mContext = mContext.createContextAsUser(UserHandle.of(userId), /* flags= */ 0);
mBtnMode = mAccessibilityButtonModeObserver.getCurrentAccessibilityButtonMode();
mBtnTargets =
mAccessibilityButtonTargetsObserver.getCurrentAccessibilityButtonTargets();
handleFloatingMenuVisibility(mIsKeyguardVisible, mBtnMode, mBtnTargets);
}
};
@Inject
public AccessibilityFloatingMenuController(Context context,
AccessibilityButtonTargetsObserver accessibilityButtonTargetsObserver,
AccessibilityButtonModeObserver accessibilityButtonModeObserver,
KeyguardUpdateMonitor keyguardUpdateMonitor) {
mContext = context;
mAccessibilityButtonTargetsObserver = accessibilityButtonTargetsObserver;
mAccessibilityButtonModeObserver = accessibilityButtonModeObserver;
mKeyguardUpdateMonitor = keyguardUpdateMonitor;
mIsKeyguardVisible = false;
mIsAccessibilityManagerServiceReady = false;
}
/**
* Handles visibility of the accessibility floating menu when accessibility button mode changes.
*
* @param mode Current accessibility button mode.
*/
@Override
public void onAccessibilityButtonModeChanged(@AccessibilityButtonMode int mode) {
mBtnMode = mode;
handleFloatingMenuVisibility(mIsKeyguardVisible, mBtnMode, mBtnTargets);
}
/**
* Handles visibility of the accessibility floating menu when accessibility button targets
* changes.
* List should come from {@link android.provider.Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS}.
* @param targets Current accessibility button list.
*/
@Override
public void onAccessibilityButtonTargetsChanged(String targets) {
mBtnTargets = targets;
handleFloatingMenuVisibility(mIsKeyguardVisible, mBtnMode, mBtnTargets);
}
/** Initializes the AccessibilityFloatingMenuController configurations. */
public void init() {
mBtnMode = mAccessibilityButtonModeObserver.getCurrentAccessibilityButtonMode();
mBtnTargets = mAccessibilityButtonTargetsObserver.getCurrentAccessibilityButtonTargets();
registerContentObservers();
}
private void registerContentObservers() {
mAccessibilityButtonModeObserver.addListener(this);
mAccessibilityButtonTargetsObserver.addListener(this);
mKeyguardUpdateMonitor.registerCallback(mKeyguardCallback);
}
/**
* Handles the accessibility floating menu visibility with the given values.
*
* @param keyguardVisible the keyguard visibility status. Not show the
* {@link AccessibilityFloatingMenu} when keyguard appears.
* @param mode accessibility button mode {@link AccessibilityButtonMode}
* @param targets accessibility button list; it should comes from
* {@link android.provider.Settings.Secure#ACCESSIBILITY_BUTTON_TARGETS}.
*/
private void handleFloatingMenuVisibility(boolean keyguardVisible,
@AccessibilityButtonMode int mode, String targets) {
if (keyguardVisible) {
destroyFloatingMenu();
return;
}
if (shouldShowFloatingMenu(mode, targets)) {
showFloatingMenu();
} else {
destroyFloatingMenu();
}
}
private boolean shouldShowFloatingMenu(@AccessibilityButtonMode int mode, String targets) {
return mode == ACCESSIBILITY_BUTTON_MODE_FLOATING_MENU && !TextUtils.isEmpty(targets);
}
private void showFloatingMenu() {
if (mFloatingMenu == null) {
mFloatingMenu = new AccessibilityFloatingMenu(mContext);
}
mFloatingMenu.show();
}
private void destroyFloatingMenu() {
if (mFloatingMenu == null) {
return;
}
mFloatingMenu.hide();
mFloatingMenu = null;
}
}
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