Add more quickstep related code

app/build.gradle

@@ -95,6 +95,8 @@ android {
             res.srcDirs = ['src/apiOreo/res']
         }
     }
+
+    addFrameworkJar('framework.jar')
 }
 
 dependencies {
@@ -103,7 +105,7 @@ dependencies {
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     implementation "androidx.dynamicanimation:dynamicanimation:1.0.0"
     implementation files('libs/sysui_shared.jar')
-
+    compileOnly files('libs/framework.jar')
     apiNougatImplementation 'org.cyanogenmod:platform.sdk:6.0'
     apiOreoImplementation files('libs/lineage-sdk-oreo.jar')
 

app/src/main/java/foundation/e/blisslauncher/core/Utilities.java

@@ -13,9 +13,12 @@ import android.graphics.Canvas;
 import android.graphics.Matrix;
 import android.graphics.Paint;
 import android.graphics.Rect;
+import android.graphics.RectF;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
+import android.os.Handler;
+import android.os.Message;
 import android.os.PowerManager;
 import android.text.TextUtils;
 import android.util.DisplayMetrics;
@@ -69,6 +72,8 @@ public class Utilities {
     public static final boolean ATLEAST_MARSHMALLOW =
         Build.VERSION.SDK_INT >= 23;
 
+    public static final int SINGLE_FRAME_MS = 16;
+
     // These values are same as that in {@link AsyncTask}.
     private static final int CPU_COUNT = Runtime.getRuntime().availableProcessors();
     private static final int CORE_POOL_SIZE = CPU_COUNT + 1;
@@ -398,4 +403,26 @@ public class Utilities {
             throw new RuntimeException(e);
         }
     }
+
+    public static void scaleRectFAboutCenter(RectF r, float scale) {
+        if (scale != 1.0f) {
+            float cx = r.centerX();
+            float cy = r.centerY();
+            r.offset(-cx, -cy);
+            r.left = r.left * scale;
+            r.top = r.top * scale ;
+            r.right = r.right * scale;
+            r.bottom = r.bottom * scale;
+            r.offset(cx, cy);
+        }
+    }
+
+    /**
+     * Utility method to post a runnable on the handler, skipping the synchronization barriers.
+     */
+    public static void postAsyncCallback(Handler handler, Runnable callback) {
+        Message msg = Message.obtain(handler, callback);
+        msg.setAsynchronous(true);
+        handler.sendMessage(msg);
+    }
 }

app/src/main/java/foundation/e/blisslauncher/core/customviews/InsettableFrameLayout.kt

@@ -15,6 +15,18 @@ open class InsettableFrameLayout(private val mContext: Context, attrs: Attribute
 
     var windowInsets: WindowInsets? = null
 
+    val insets: Rect
+        get() {
+            var tempInsets = Rect()
+            if (this.windowInsets != null) {
+                tempInsets.left = this.windowInsets!!.systemWindowInsetLeft
+                tempInsets.top = this.windowInsets!!.systemWindowInsetTop
+                tempInsets.right = this.windowInsets!!.systemWindowInsetRight
+                tempInsets.bottom = this.windowInsets!!.systemWindowInsetBottom
+            }
+            return tempInsets
+        }
+
     private fun setFrameLayoutChildInsets(child: View, newInsets: WindowInsets?, oldInsets: Rect) {
         if (newInsets == null) return
         val lp: LayoutParams =

app/src/main/java/foundation/e/blisslauncher/core/customviews/PagedView.java

@@ -576,7 +576,7 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         final int scrollOffsetRight = getWidth() - getPaddingRight() - mInsets.right;
         boolean pageScrollChanged = false;
 
-        for (int i = startIndex, childLeft = scrollOffsetLeft; i != endIndex; i += delta) {
+        for (int i = startIndex, childLeft = scrollOffsetLeft + offsetForPageScrolls(); i != endIndex; i += delta) {
             final View child = getPageAt(i);
             if (scrollLogic.shouldIncludeView(child)) {
                 final int childWidth = child.getMeasuredWidth();
@@ -654,6 +654,10 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         return getPageAt(index).getLeft();
     }
 
+    protected int offsetForPageScrolls() {
+        return 0;
+    }
+
     @Override
     public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) {
         int page = indexToPage(indexOfChild(child));
@@ -1016,6 +1020,10 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         mAllowOverScroll = enable;
     }
 
+    protected void restoreScrollOnLayout() {
+        setCurrentPage(getNextPage());
+    }
+
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
         super.onTouchEvent(ev);
@@ -1398,7 +1406,7 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         return snapToPage(whichPage, duration, false);
     }
 
-    protected boolean snapToPage(int whichPage, int duration, boolean immediate) {
+    public boolean snapToPage(int whichPage, int duration, boolean immediate) {
         whichPage = validateNewPage(whichPage);
 
         int newX = getScrollForPage(whichPage);
@@ -1477,6 +1485,15 @@ public abstract class PagedView<T extends View & PageIndicator> extends ViewGrou
         return mDownMotionY;
     }
 
+    protected boolean isPageOrderFlipped() {
+        return false;
+    }
+
+    protected String getCurrentPageDescription() {
+        return getContext().getString(R.string.default_scroll_format,
+            getNextPage() + 1, getChildCount());
+    }
+
     protected interface ComputePageScrollsLogic {
 
         boolean shouldIncludeView(View view);

app/src/main/java/foundation/e/blisslauncher/core/executors/LooperExecutor.java

+/*
+ * Copyright (C) 2017 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 foundation.e.blisslauncher.core.executors;
+
+import android.os.Handler;
+import android.os.Looper;
+
+import java.util.List;
+import java.util.concurrent.AbstractExecutorService;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Extension of {@link AbstractExecutorService} which executed on a provided looper.
+ */
+public class LooperExecutor extends AbstractExecutorService {
+
+    private final Handler mHandler;
+
+    public LooperExecutor(Looper looper) {
+        mHandler = new Handler(looper);
+    }
+
+    public Handler getHandler() {
+        return mHandler;
+    }
+
+    @Override
+    public void execute(Runnable runnable) {
+        if (mHandler.getLooper() == Looper.myLooper()) {
+            runnable.run();
+        } else {
+            mHandler.post(runnable);
+        }
+    }
+
+    /**
+     * Not supported and throws an exception when used.
+     */
+    @Override
+    @Deprecated
+    public void shutdown() {
+        throw new UnsupportedOperationException();
+    }
+
+    /**
+     * Not supported and throws an exception when used.
+     */
+    @Override
+    @Deprecated
+    public List<Runnable> shutdownNow() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean isShutdown() {
+        return false;
+    }
+
+    @Override
+    public boolean isTerminated() {
+        return false;
+    }
+
+    /**
+     * Not supported and throws an exception when used.
+     */
+    @Override
+    @Deprecated
+    public boolean awaitTermination(long l, TimeUnit timeUnit) throws InterruptedException {
+        throw new UnsupportedOperationException();
+    }
+}

app/src/main/java/foundation/e/blisslauncher/core/executors/MainThreadExecutor.java

@@ -8,45 +8,10 @@ import java.util.List;
 import java.util.concurrent.AbstractExecutorService;
 import java.util.concurrent.TimeUnit;
 
-public class MainThreadExecutor extends AbstractExecutorService {
-
-    private final Handler mHandler;
+public class MainThreadExecutor extends LooperExecutor {
 
     public MainThreadExecutor() {
-        mHandler = new Handler(Looper.getMainLooper());
-    }
-    @Override
-    public void shutdown() {
-        throw new UnsupportedOperationException();
-    }
-
-    @NonNull
-    @Override
-    public List<Runnable> shutdownNow() {
-        throw new UnsupportedOperationException();
-    }
-
-    @Override
-    public boolean isShutdown() {
-        return false;
+        super(Looper.getMainLooper());
     }
 
-    @Override
-    public boolean isTerminated() {
-        return false;
-    }
-
-    @Override
-    public boolean awaitTermination(long timeout, @NonNull TimeUnit unit) throws InterruptedException {
-        throw new UnsupportedOperationException();
-    }
-
-    @Override
-    public void execute(@NonNull Runnable runnable) {
-        if (mHandler.getLooper() == Looper.myLooper()) {
-            runnable.run();
-        } else {
-            mHandler.post(runnable);
-        }
-    }
 }

app/src/main/java/foundation/e/blisslauncher/core/touch/SwipeDetector.java

+/*
+ * Copyright (C) 2017 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 foundation.e.blisslauncher.core.touch;
+
+import android.content.Context;
+import android.graphics.PointF;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.ViewConfiguration;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
+import static android.view.MotionEvent.INVALID_POINTER_ID;
+
+/**
+ * One dimensional scroll/drag/swipe gesture detector.
+ *
+ * Definition of swipe is different from android system in that this detector handles
+ * 'swipe to dismiss', 'swiping up/down a container' but also keeps scrolling state before
+ * swipe action happens
+ */
+public class SwipeDetector {
+
+    private static final boolean DBG = false;
+    private static final String TAG = "SwipeDetector";
+
+    private int mScrollConditions;
+    public static final int DIRECTION_POSITIVE = 1 << 0;
+    public static final int DIRECTION_NEGATIVE = 1 << 1;
+    public static final int DIRECTION_BOTH = DIRECTION_NEGATIVE | DIRECTION_POSITIVE;
+
+    private static final float ANIMATION_DURATION = 1200;
+
+    protected int mActivePointerId = INVALID_POINTER_ID;
+
+    /**
+     * The minimum release velocity in pixels per millisecond that triggers fling..
+     */
+    public static final float RELEASE_VELOCITY_PX_MS = 1.0f;
+
+    /**
+     * The time constant used to calculate dampening in the low-pass filter of scroll velocity.
+     * Cutoff frequency is set at 10 Hz.
+     */
+    public static final float SCROLL_VELOCITY_DAMPENING_RC = 1000f / (2f * (float) Math.PI * 10);
+
+    /* Scroll state, this is set to true during dragging and animation. */
+    private ScrollState mState = ScrollState.IDLE;
+
+    enum ScrollState {
+        IDLE,
+        DRAGGING,      // onDragStart, onDrag
+        SETTLING       // onDragEnd
+    }
+
+    public static abstract class Direction {
+
+        abstract float getDisplacement(MotionEvent ev, int pointerIndex, PointF refPoint);
+
+        /**
+         * Distance in pixels a touch can wander before we think the user is scrolling.
+         */
+        abstract float getActiveTouchSlop(MotionEvent ev, int pointerIndex, PointF downPos);
+    }
+
+    public static final Direction VERTICAL = new Direction() {
+
+        @Override
+        float getDisplacement(MotionEvent ev, int pointerIndex, PointF refPoint) {
+            return ev.getY(pointerIndex) - refPoint.y;
+        }
+
+        @Override
+        float getActiveTouchSlop(MotionEvent ev, int pointerIndex, PointF downPos) {
+            return Math.abs(ev.getX(pointerIndex) - downPos.x);
+        }
+    };
+
+    public static final Direction HORIZONTAL = new Direction() {
+
+        @Override
+        float getDisplacement(MotionEvent ev, int pointerIndex, PointF refPoint) {
+            return ev.getX(pointerIndex) - refPoint.x;
+        }
+
+        @Override
+        float getActiveTouchSlop(MotionEvent ev, int pointerIndex, PointF downPos) {
+            return Math.abs(ev.getY(pointerIndex) - downPos.y);
+        }
+    };
+
+    //------------------- ScrollState transition diagram -----------------------------------
+    //
+    // IDLE ->      (mDisplacement > mTouchSlop) -> DRAGGING
+    // DRAGGING -> (MotionEvent#ACTION_UP, MotionEvent#ACTION_CANCEL) -> SETTLING
+    // SETTLING -> (MotionEvent#ACTION_DOWN) -> DRAGGING
+    // SETTLING -> (View settled) -> IDLE
+
+    private void setState(ScrollState newState) {
+        if (DBG) {
+            Log.d(TAG, "setState:" + mState + "->" + newState);
+        }
+        // onDragStart and onDragEnd is reported ONLY on state transition
+        if (newState == ScrollState.DRAGGING) {
+            initializeDragging();
+            if (mState == ScrollState.IDLE) {
+                reportDragStart(false /* recatch */);
+            } else if (mState == ScrollState.SETTLING) {
+                reportDragStart(true /* recatch */);
+            }
+        }
+        if (newState == ScrollState.SETTLING) {
+            reportDragEnd();
+        }
+
+        mState = newState;
+    }
+
+    public boolean isDraggingOrSettling() {
+        return mState == ScrollState.DRAGGING || mState == ScrollState.SETTLING;
+    }
+
+    /**
+     * There's no touch and there's no animation.
+     */
+    public boolean isIdleState() {
+        return mState == ScrollState.IDLE;
+    }
+
+    public boolean isSettlingState() {
+        return mState == ScrollState.SETTLING;
+    }
+
+    public boolean isDraggingState() {
+        return mState == ScrollState.DRAGGING;
+    }
+
+    private final PointF mDownPos = new PointF();
+    private final PointF mLastPos = new PointF();
+    private Direction mDir;
+
+    private final float mTouchSlop;
+
+    /* Client of this gesture detector can register a callback. */
+    private final Listener mListener;
+
+    private long mCurrentMillis;
+
+    private float mVelocity;
+    private float mLastDisplacement;
+    private float mDisplacement;
+
+    private float mSubtractDisplacement;
+    private boolean mIgnoreSlopWhenSettling;
+
+    public interface Listener {
+        void onDragStart(boolean start);
+
+        boolean onDrag(float displacement, float velocity);
+
+        void onDragEnd(float velocity, boolean fling);
+    }
+
+    public SwipeDetector(@NonNull Context context, @NonNull Listener l, @NonNull Direction dir) {
+        this(ViewConfiguration.get(context).getScaledTouchSlop(), l, dir);
+    }
+
+    @VisibleForTesting
+    protected SwipeDetector(float touchSlope, @NonNull Listener l, @NonNull Direction dir) {
+        mTouchSlop = touchSlope;
+        mListener = l;
+        mDir = dir;
+    }
+
+    public void updateDirection(Direction dir) {
+        mDir = dir;
+    }
+
+    public void setDetectableScrollConditions(int scrollDirectionFlags, boolean ignoreSlop) {
+        mScrollConditions = scrollDirectionFlags;
+        mIgnoreSlopWhenSettling = ignoreSlop;
+    }
+
+    public int getScrollDirections() {
+        return mScrollConditions;
+    }
+
+    private boolean shouldScrollStart(MotionEvent ev, int pointerIndex) {
+        // reject cases where the angle or slop condition is not met.
+        if (Math.max(mDir.getActiveTouchSlop(ev, pointerIndex, mDownPos), mTouchSlop)
+                > Math.abs(mDisplacement)) {
+            return false;
+        }
+
+        // Check if the client is interested in scroll in current direction.
+        if (((mScrollConditions & DIRECTION_NEGATIVE) > 0 && mDisplacement > 0) ||
+                ((mScrollConditions & DIRECTION_POSITIVE) > 0 && mDisplacement < 0)) {
+            return true;
+        }
+        return false;
+    }
+
+    public boolean onTouchEvent(MotionEvent ev) {
+        switch (ev.getActionMasked()) {
+            case MotionEvent.ACTION_DOWN:
+                mActivePointerId = ev.getPointerId(0);
+                mDownPos.set(ev.getX(), ev.getY());
+                mLastPos.set(mDownPos);
+                mLastDisplacement = 0;
+                mDisplacement = 0;
+                mVelocity = 0;
+
+                if (mState == ScrollState.SETTLING && mIgnoreSlopWhenSettling) {
+                    setState(ScrollState.DRAGGING);
+                }
+                break;
+            //case MotionEvent.ACTION_POINTER_DOWN:
+            case MotionEvent.ACTION_POINTER_UP:
+                int ptrIdx = ev.getActionIndex();
+                int ptrId = ev.getPointerId(ptrIdx);
+                if (ptrId == mActivePointerId) {
+                    final int newPointerIdx = ptrIdx == 0 ? 1 : 0;
+                    mDownPos.set(
+                            ev.getX(newPointerIdx) - (mLastPos.x - mDownPos.x),
+                            ev.getY(newPointerIdx) - (mLastPos.y - mDownPos.y));
+                    mLastPos.set(ev.getX(newPointerIdx), ev.getY(newPointerIdx));
+                    mActivePointerId = ev.getPointerId(newPointerIdx);
+                }
+                break;
+            case MotionEvent.ACTION_MOVE:
+                int pointerIndex = ev.findPointerIndex(mActivePointerId);
+                if (pointerIndex == INVALID_POINTER_ID) {
+                    break;
+                }
+                mDisplacement = mDir.getDisplacement(ev, pointerIndex, mDownPos);
+                computeVelocity(mDir.getDisplacement(ev, pointerIndex, mLastPos),
+                        ev.getEventTime());
+
+                // handle state and listener calls.
+                if (mState != ScrollState.DRAGGING && shouldScrollStart(ev, pointerIndex)) {
+                    setState(ScrollState.DRAGGING);
+                }
+                if (mState == ScrollState.DRAGGING) {
+                    reportDragging();
+                }
+                mLastPos.set(ev.getX(pointerIndex), ev.getY(pointerIndex));
+                break;
+            case MotionEvent.ACTION_CANCEL:
+            case MotionEvent.ACTION_UP:
+                // These are synthetic events and there is no need to update internal values.
+                if (mState == ScrollState.DRAGGING) {
+                    setState(ScrollState.SETTLING);
+                }
+                break;
+            default:
+                break;
+        }
+        return true;
+    }
+
+    public void finishedScrolling() {
+        setState(ScrollState.IDLE);
+    }
+
+    private boolean reportDragStart(boolean recatch) {
+        mListener.onDragStart(!recatch);
+        if (DBG) {
+            Log.d(TAG, "onDragStart recatch:" + recatch);
+        }
+        return true;
+    }
+
+    private void initializeDragging() {
+        if (mState == ScrollState.SETTLING && mIgnoreSlopWhenSettling) {
+            mSubtractDisplacement = 0;
+        }
+        if (mDisplacement > 0) {
+            mSubtractDisplacement = mTouchSlop;
+        } else {
+            mSubtractDisplacement = -mTouchSlop;
+        }
+    }
+
+    /**
+     * Returns if the start drag was towards the positive direction or negative.
+     *
+     * @see #setDetectableScrollConditions(int, boolean)
+     * @see #DIRECTION_BOTH