Revert "Revert "Enable FLAG_SLIPPERY window flag when swipe down on workspace"" (f5e81122) · Commits · e / os / android_packages_apps_Trebuchet

quickstep/src/com/android/launcher3/uioverrides/touchcontrollers/StatusBarTouchController.java

+51 −17

Original line number	Diff line number	Diff line
		@@ -17,17 +17,22 @@ 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.touch.TouchEventTranslator;
		import com.android.launcher3.util.TouchController;
		import com.android.quickstep.RecentsModel;
		import com.android.systemui.shared.recents.ISystemUiProxy;
		@@ -36,18 +41,29 @@ import java.io.PrintWriter;

		/**
		* TouchController for handling touch events that get sent to the StatusBar. Once the
		* Once the event delta y passes the touch slop, the events start getting forwarded.
		* 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;
		protected final TouchEventTranslator mTranslator;
		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;
		@@ -56,7 +72,7 @@ public class StatusBarTouchController implements TouchController {
		mLauncher = l;
		// Guard against TAPs by increasing the touch slop.
		mTouchSlop = 2 * ViewConfiguration.get(l).getScaledTouchSlop();
		mTranslator = new TouchEventTranslator((MotionEvent ev)-> dispatchTouchEvent(ev));
		mDownEvents = new SparseArray<>();
		}

		@Override
		@@ -64,7 +80,6 @@ public class StatusBarTouchController implements TouchController {
		writer.println(prefix + "mCanIntercept:" + mCanIntercept);
		writer.println(prefix + "mLastAction:" + MotionEvent.actionToString(mLastAction));
		writer.println(prefix + "mSysUiProxy available:" + (mSysUiProxy != null));

		}

		private void dispatchTouchEvent(MotionEvent ev) {
		@@ -81,26 +96,31 @@ public class StatusBarTouchController implements TouchController {
		@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;
		}
		mTranslator.reset();
		mTranslator.setDownParameters(0, ev);
		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.
		mTranslator.setDownParameters(ev.getActionIndex(), ev);
		mDownEvents.put(pid, new PointF(ev.getX(idx), ev.getY(idx)));
		}
		if (!mCanIntercept) {
		return false;
		}
		if (action == ACTION_MOVE) {
		float dy = ev.getY() - mTranslator.getDownY();
		float dx = ev.getX() - mTranslator.getDownX();
		if (dy > mTouchSlop && dy > Math.abs(dx)) {
		mTranslator.dispatchDownEvents(ev);
		mTranslator.processMotionEvent(ev);
		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) {
		@@ -110,12 +130,26 @@ public class StatusBarTouchController implements TouchController {
		return false;
		}


		@Override
		public final boolean onControllerTouchEvent(MotionEvent ev) {
		mTranslator.processMotionEvent(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) \|\|

src/com/android/launcher3/touch/TouchEventTranslator.java

deleted100644 → 0

+0 −283

Original line number	Diff line number	Diff line
		/*
		* 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.touch;

		import android.graphics.PointF;
		import android.util.Log;
		import android.util.Pair;
		import android.util.SparseArray;
		import android.view.MotionEvent;
		import android.view.MotionEvent.PointerCoords;
		import android.view.MotionEvent.PointerProperties;

		import java.util.function.Consumer;

		/**
		* To minimize the size of the MotionEvent, historic events are not copied and passed via the
		* listener.
		*/
		public class TouchEventTranslator {

		private static final String TAG = "TouchEventTranslator";
		private static final boolean DEBUG = false;

		private class DownState {
		long timeStamp;
		float downX;
		float downY;
		public DownState(long timeStamp, float downX, float downY) {
		this.timeStamp = timeStamp;
		this.downX = downX;
		this.downY = downY;
		}
		};
		private final DownState ZERO = new DownState(0, 0f, 0f);

		private final Consumer<MotionEvent> mListener;

		private final SparseArray<DownState> mDownEvents;
		private final SparseArray<PointF> mFingers;

		private final SparseArray<Pair<PointerProperties[], PointerCoords[]>> mCache;

		public TouchEventTranslator(Consumer<MotionEvent> listener) {
		mDownEvents = new SparseArray<>();
		mFingers = new SparseArray<>();
		mCache = new SparseArray<>();

		mListener = listener;
		}

		public void reset() {
		mDownEvents.clear();
		mFingers.clear();
		}

		public float getDownX() {
		return mDownEvents.get(0).downX;
		}

		public float getDownY() {
		return mDownEvents.get(0).downY;
		}

		public void setDownParameters(int idx, MotionEvent e) {
		DownState ev = new DownState(e.getEventTime(), e.getX(idx), e.getY(idx));
		mDownEvents.append(idx, ev);
		}

		public void dispatchDownEvents(MotionEvent ev) {
		for(int i = 0; i < ev.getPointerCount() && i < mDownEvents.size(); i++) {
		int pid = ev.getPointerId(i);
		put(pid, i, ev.getX(i), 0, mDownEvents.get(i).timeStamp, ev);
		}
		}

		public void processMotionEvent(MotionEvent ev) {
		if (DEBUG) {
		printSamples(TAG + " processMotionEvent", ev);
		}
		int index = ev.getActionIndex();
		float x = ev.getX(index);
		float y = ev.getY(index) - mDownEvents.get(index, ZERO).downY;
		switch (ev.getActionMasked()) {
		case MotionEvent.ACTION_POINTER_DOWN:
		int pid = ev.getPointerId(index);
		if(mFingers.get(pid, null) != null) {
		for(int i=0; i < ev.getPointerCount(); i++) {
		pid = ev.getPointerId(i);
		position(pid, x, y);
		}
		generateEvent(ev.getAction(), ev);
		} else {
		put(pid, index, x, y, ev);
		}
		break;
		case MotionEvent.ACTION_MOVE:
		for(int i=0; i < ev.getPointerCount(); i++) {
		pid = ev.getPointerId(i);
		position(pid, x, y);
		}
		generateEvent(ev.getAction(), ev);
		break;
		case MotionEvent.ACTION_POINTER_UP:
		case MotionEvent.ACTION_UP:
		pid = ev.getPointerId(index);
		lift(pid, index, x, y, ev);
		break;
		case MotionEvent.ACTION_CANCEL:
		cancel(ev);
		break;
		default:
		Log.v(TAG, "Didn't process ");
		printSamples(TAG, ev);

		}
		}

		private TouchEventTranslator put(int id, int index, float x, float y, MotionEvent ev) {
		return put(id, index, x, y, ev.getEventTime(), ev);
		}

		private TouchEventTranslator put(int id, int index, float x, float y, long ms, MotionEvent ev) {
		checkFingerExistence(id, false);
		boolean isInitialDown = (mFingers.size() == 0);

		mFingers.put(id, new PointF(x, y));
		int n = mFingers.size();

		if (mCache.get(n) == null) {
		PointerProperties[] properties = new PointerProperties[n];
		PointerCoords[] coords = new PointerCoords[n];
		for (int i = 0; i < n; i++) {
		properties[i] = new PointerProperties();
		coords[i] = new PointerCoords();
		}
		mCache.put(n, new Pair(properties, coords));
		}

		int action;
		if (isInitialDown) {
		action = MotionEvent.ACTION_DOWN;
		} else {
		action = MotionEvent.ACTION_POINTER_DOWN;
		// Set the id of the changed pointer.
		action \|= index << MotionEvent.ACTION_POINTER_INDEX_SHIFT;
		}
		generateEvent(action, ms, ev);
		return this;
		}

		public TouchEventTranslator position(int id, float x, float y) {
		checkFingerExistence(id, true);
		mFingers.get(id).set(x, y);
		return this;
		}

		private TouchEventTranslator lift(int id, int index, MotionEvent ev) {
		checkFingerExistence(id, true);
		boolean isFinalUp = (mFingers.size() == 1);
		int action;
		if (isFinalUp) {
		action = MotionEvent.ACTION_UP;
		} else {
		action = MotionEvent.ACTION_POINTER_UP;
		// Set the id of the changed pointer.
		action \|= index << MotionEvent.ACTION_POINTER_INDEX_SHIFT;
		}
		generateEvent(action, ev);
		mFingers.remove(id);
		return this;
		}

		private TouchEventTranslator lift(int id, int index, float x, float y, MotionEvent ev) {
		checkFingerExistence(id, true);
		mFingers.get(id).set(x, y);
		return lift(id, index, ev);
		}

		public TouchEventTranslator cancel(MotionEvent ev) {
		generateEvent(MotionEvent.ACTION_CANCEL, ev);
		mFingers.clear();
		return this;
		}

		private void checkFingerExistence(int id, boolean shouldExist) {
		if (shouldExist != (mFingers.get(id, null) != null)) {
		throw new IllegalArgumentException(
		shouldExist ? "Finger does not exist" : "Finger already exists");
		}
		}


		/**
		* Used to debug MotionEvents being sent/received.
		*/
		public void printSamples(String msg, MotionEvent ev) {
		System.out.printf("%s %s", msg, MotionEvent.actionToString(ev.getActionMasked()));
		final int pointerCount = ev.getPointerCount();
		System.out.printf("#%d/%d", ev.getActionIndex(), pointerCount);
		System.out.printf(" t=%d:", ev.getEventTime());
		for (int p = 0; p < pointerCount; p++) {
		System.out.printf(" id=%d: (%f,%f)",
		ev.getPointerId(p), ev.getX(p), ev.getY(p));
		}
		System.out.println();
		}

		private void generateEvent(int action, MotionEvent ev) {
		generateEvent(action, ev.getEventTime(), ev);
		}

		private void generateEvent(int action, long ms, MotionEvent ev) {
		Pair<PointerProperties[], PointerCoords[]> state = getFingerState();
		MotionEvent event = MotionEvent.obtain(
		mDownEvents.get(0).timeStamp,
		ms,
		action,
		state.first.length,
		state.first,
		state.second,
		ev.getMetaState(),
		ev.getButtonState() /* buttonState */,
		ev.getXPrecision() /* xPrecision */,
		ev.getYPrecision() /* yPrecision */,
		ev.getDeviceId(),
		ev.getEdgeFlags(),
		ev.getSource(),
		ev.getFlags() /* flags */);
		if (DEBUG) {
		printSamples(TAG + " generateEvent", event);
		}
		if (event.getPointerId(event.getActionIndex()) < 0) {
		printSamples(TAG + "generateEvent", event);
		throw new IllegalStateException(event.getActionIndex() + " not found in MotionEvent");
		}
		mListener.accept(event);
		event.recycle();
		}

		/**
		* Returns the description of the fingers' state expected by MotionEvent.
		*/
		private Pair<PointerProperties[], PointerCoords[]> getFingerState() {
		int nFingers = mFingers.size();

		Pair<PointerProperties[], PointerCoords[]> result = mCache.get(nFingers);
		PointerProperties[] properties = result.first;
		PointerCoords[] coordinates = result.second;

		int index = 0;
		for (int i = 0; i < mFingers.size(); i++) {
		int id = mFingers.keyAt(i);
		PointF location = mFingers.get(id);

		PointerProperties property = properties[i];
		property.id = id;
		property.toolType = MotionEvent.TOOL_TYPE_FINGER;
		properties[index] = property;

		PointerCoords coordinate = coordinates[i];
		coordinate.x = location.x;
		coordinate.y = location.y;
		coordinate.pressure = 1.0f;
		coordinates[index] = coordinate;

		index++;
		}
		return mCache.get(nFingers);
		}
		}