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/*
* Copyright (C) 2018 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.launcher3.states;
import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LOCKED;
import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_NOSENSOR;
import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
import static android.util.DisplayMetrics.DENSITY_DEVICE_STABLE;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.content.res.Resources;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import com.android.launcher3.Launcher;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.util.UiThreadHelper;
/**
* Utility class to manage launcher rotation
*/
public class RotationHelper implements OnSharedPreferenceChangeListener {
public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation";
public static boolean getAllowRotationDefaultValue() {
// If the device was scaled, used the original dimensions to determine if rotation
// is allowed of not.
Resources res = Resources.getSystem();
int originalSmallestWidth = res.getConfiguration().smallestScreenWidthDp
* res.getDisplayMetrics().densityDpi / DENSITY_DEVICE_STABLE;
return originalSmallestWidth >= 600;
}
public static final int REQUEST_NONE = 0;
public static final int REQUEST_ROTATE = 1;
public static final int REQUEST_LOCK = 2;
private final Launcher mLauncher;
private final SharedPreferences mPrefs;
private boolean mIgnoreAutoRotateSettings;
private boolean mAutoRotateEnabled;
/**
* Rotation request made by {@link InternalStateHandler}. This supersedes any other request.
*/
private int mStateHandlerRequest = REQUEST_NONE;
/**
* Rotation request made by an app transition
*/
private int mCurrentTransitionRequest = REQUEST_NONE;
/**
* Rotation request made by a Launcher State
*/
private int mCurrentStateRequest = REQUEST_NONE;
// This is used to defer setting rotation flags until the activity is being created
private boolean mInitialized;
public boolean mDestroyed;
private int mLastActivityFlags = -1;
public RotationHelper(Launcher launcher) {
mLauncher = launcher;
// On large devices we do not handle auto-rotate differently.
mIgnoreAutoRotateSettings = mLauncher.getResources().getBoolean(R.bool.allow_rotation);
if (!mIgnoreAutoRotateSettings) {
mPrefs = Utilities.getPrefs(mLauncher);
mPrefs.registerOnSharedPreferenceChangeListener(this);
mAutoRotateEnabled = mPrefs.getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
getAllowRotationDefaultValue());
} else {
mPrefs = null;
}
}
public boolean homeScreenCanRotate() {
return mIgnoreAutoRotateSettings || mAutoRotateEnabled
|| mStateHandlerRequest != REQUEST_NONE;
}
private void updateRotationAnimation() {
if (FeatureFlags.FAKE_LANDSCAPE_UI.get()) {
WindowManager.LayoutParams lp = mLauncher.getWindow().getAttributes();
lp.rotationAnimation = homeScreenCanRotate()
? WindowManager.LayoutParams.ROTATION_ANIMATION_ROTATE
: WindowManager.LayoutParams.ROTATION_ANIMATION_SEAMLESS;
mLauncher.getWindow().setAttributes(lp);
}
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s) {
boolean wasRotationEnabled = mAutoRotateEnabled;
mAutoRotateEnabled = mPrefs.getBoolean(ALLOW_ROTATION_PREFERENCE_KEY,
getAllowRotationDefaultValue());
if (mAutoRotateEnabled != wasRotationEnabled) {
notifyChange();
updateRotationAnimation();
mLauncher.reapplyUi();
}
}
public void setStateHandlerRequest(int request) {
if (mStateHandlerRequest != request) {
mStateHandlerRequest = request;
notifyChange();
}
}
public void setCurrentTransitionRequest(int request) {
if (mCurrentTransitionRequest != request) {
mCurrentTransitionRequest = request;
notifyChange();
}
}
public void setCurrentStateRequest(int request) {
if (mCurrentStateRequest != request) {
mCurrentStateRequest = request;
notifyChange();
}
}
// Used by tests only.
public void forceAllowRotationForTesting(boolean allowRotation) {
mIgnoreAutoRotateSettings =
allowRotation || mLauncher.getResources().getBoolean(R.bool.allow_rotation);
notifyChange();
}
public void initialize() {
if (!mInitialized) {
mInitialized = true;
notifyChange();
updateRotationAnimation();
}
}
public void destroy() {
if (!mDestroyed) {
mDestroyed = true;
if (mPrefs != null) {
mPrefs.unregisterOnSharedPreferenceChangeListener(this);
}
}
}
private void notifyChange() {
if (!mInitialized || mDestroyed) {
return;
}
final int activityFlags;
if (mStateHandlerRequest != REQUEST_NONE) {
activityFlags = mStateHandlerRequest == REQUEST_LOCK ?
SCREEN_ORIENTATION_LOCKED : SCREEN_ORIENTATION_UNSPECIFIED;
} else if (mCurrentTransitionRequest != REQUEST_NONE) {
activityFlags = mCurrentTransitionRequest == REQUEST_LOCK ?
SCREEN_ORIENTATION_LOCKED : SCREEN_ORIENTATION_UNSPECIFIED;
} else if (mCurrentStateRequest == REQUEST_LOCK) {
activityFlags = SCREEN_ORIENTATION_LOCKED;
} else if (mIgnoreAutoRotateSettings || mCurrentStateRequest == REQUEST_ROTATE
|| mAutoRotateEnabled) {
activityFlags = SCREEN_ORIENTATION_UNSPECIFIED;
} else {
// If auto rotation is off, allow rotation on the activity, in case the user is using
// forced rotation.
activityFlags = SCREEN_ORIENTATION_NOSENSOR;
}
if (activityFlags != mLastActivityFlags) {
mLastActivityFlags = activityFlags;
UiThreadHelper.setOrientationAsync(mLauncher, activityFlags);
}
}
@Override
public String toString() {
return String.format("[mStateHandlerRequest=%d, mCurrentStateRequest=%d,"
+ " mLastActivityFlags=%d, mIgnoreAutoRotateSettings=%b, mAutoRotateEnabled=%b]",
mStateHandlerRequest, mCurrentStateRequest, mLastActivityFlags,
mIgnoreAutoRotateSettings, mAutoRotateEnabled);
}
}
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