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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.uioverrides.touchcontrollers;
import static android.view.MotionEvent.ACTION_DOWN;
import static android.view.MotionEvent.ACTION_MOVE;
import static android.view.MotionEvent.ACTION_UP;
import static android.view.MotionEvent.ACTION_CANCEL;
import android.graphics.PointF;
import android.os.RemoteException;
import android.util.Log;
import android.util.SparseArray;
import android.view.MotionEvent;
import android.view.ViewConfiguration;
import android.view.Window;
import android.view.WindowManager;
import com.android.launcher3.AbstractFloatingView;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherState;
import com.android.launcher3.util.TouchController;
import com.android.quickstep.RecentsModel;
import com.android.systemui.shared.recents.ISystemUiProxy;
import java.io.PrintWriter;
/**
* TouchController for handling touch events that get sent to the StatusBar. Once the
* Once the event delta mDownY passes the touch slop, the events start getting forwarded.
* All events are offset by initial Y value of the pointer.
*/
public class StatusBarTouchController implements TouchController {
private static final String TAG = "StatusBarController";
/**
* Window flag: Enable touches to slide out of a window into neighboring
* windows in mid-gesture instead of being captured for the duration of
* the gesture.
*
* This flag changes the behavior of touch focus for this window only.
* Touches can slide out of the window but they cannot necessarily slide
* back in (unless the other window with touch focus permits it).
*/
private static final int FLAG_SLIPPERY = 0x20000000;
protected final Launcher mLauncher;
private final float mTouchSlop;
private ISystemUiProxy mSysUiProxy;
private int mLastAction;
private final SparseArray<PointF> mDownEvents;
/* If {@code false}, this controller should not handle the input {@link MotionEvent}.*/
private boolean mCanIntercept;
public StatusBarTouchController(Launcher l) {
mLauncher = l;
// Guard against TAPs by increasing the touch slop.
mTouchSlop = 2 * ViewConfiguration.get(l).getScaledTouchSlop();
mDownEvents = new SparseArray<>();
}
@Override
public void dump(String prefix, PrintWriter writer) {
writer.println(prefix + "mCanIntercept:" + mCanIntercept);
writer.println(prefix + "mLastAction:" + MotionEvent.actionToString(mLastAction));
writer.println(prefix + "mSysUiProxy available:" + (mSysUiProxy != null));
}
private void dispatchTouchEvent(MotionEvent ev) {
try {
if (mSysUiProxy != null) {
mLastAction = ev.getActionMasked();
mSysUiProxy.onStatusBarMotionEvent(ev);
}
} catch (RemoteException e) {
Log.e(TAG, "Remote exception on sysUiProxy.", e);
}
}
@Override
public final boolean onControllerInterceptTouchEvent(MotionEvent ev) {
int action = ev.getActionMasked();
int idx = ev.getActionIndex();
int pid = ev.getPointerId(idx);
if (action == ACTION_DOWN) {
mCanIntercept = canInterceptTouch(ev);
if (!mCanIntercept) {
return false;
}
mDownEvents.put(pid, new PointF(ev.getX(), ev.getY()));
} else if (ev.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN) {
// Check!! should only set it only when threshold is not entered.
mDownEvents.put(pid, new PointF(ev.getX(idx), ev.getY(idx)));
}
if (!mCanIntercept) {
return false;
}
if (action == ACTION_MOVE) {
float dy = ev.getY(idx) - mDownEvents.get(pid).y;
float dx = ev.getX(idx) - mDownEvents.get(pid).x;
// Currently input dispatcher will not do touch transfer if there are more than
// one touch pointer. Hence, even if slope passed, only set the slippery flag
// when there is single touch event. (context: InputDispatcher.cpp line 1445)
if (dy > mTouchSlop && dy > Math.abs(dx) && ev.getPointerCount() == 1) {
ev.setAction(ACTION_DOWN);
dispatchTouchEvent(ev);
setWindowSlippery(true);
return true;
}
if (Math.abs(dx) > mTouchSlop) {
mCanIntercept = false;
}
}
return false;
}
@Override
public final boolean onControllerTouchEvent(MotionEvent ev) {
if (ev.getAction() == ACTION_UP || ev.getAction() == ACTION_CANCEL) {
dispatchTouchEvent(ev);
setWindowSlippery(false);
return true;
}
return true;
}
private void setWindowSlippery(boolean enable) {
Window w = mLauncher.getWindow();
WindowManager.LayoutParams wlp = w.getAttributes();
if (enable) {
wlp.flags |= FLAG_SLIPPERY;
} else {
wlp.flags &= ~FLAG_SLIPPERY;
}
w.setAttributes(wlp);
}
private boolean canInterceptTouch(MotionEvent ev) {
if (!mLauncher.isInState(LauncherState.NORMAL) ||
AbstractFloatingView.getTopOpenViewWithType(mLauncher,
AbstractFloatingView.TYPE_STATUS_BAR_SWIPE_DOWN_DISALLOW) != null) {
return false;
} else {
// For NORMAL state, only listen if the event originated above the navbar height
DeviceProfile dp = mLauncher.getDeviceProfile();
if (ev.getY() > (mLauncher.getDragLayer().getHeight() - dp.getInsets().bottom)) {
return false;
}
}
mSysUiProxy = RecentsModel.INSTANCE.get(mLauncher).getSystemUiProxy();
return mSysUiProxy != null;
}
}
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