Fixing taskMenu and taskView clicks in fallback activity

> Extracting common methods from Launcher & DragLauncher to base classes
> Remoting some dependencies on Launcher and using the base class instead

Change-Id: I121cacf8a14190b4703cda60bdeb4f79eee69ded

1 files changed, 325 insertions, 0 deletions

diff --git a/src/com/android/launcher3/views/BaseDragLayer.java b/src/com/android/launcher3/views/BaseDragLayer.java
new file mode 100644
index 000000000..489e59e75
--- /dev/null
+++ b/src/com/android/launcher3/views/BaseDragLayer.java
@@ -0,0 +1,325 @@
+/*
+ * 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.views;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.accessibility.AccessibilityEvent;
+import android.widget.FrameLayout;
+
+import com.android.launcher3.AbstractFloatingView;
+import com.android.launcher3.BaseActivity;
+import com.android.launcher3.BaseDraggingActivity;
+import com.android.launcher3.InsettableFrameLayout;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.util.TouchController;
+
+import java.util.ArrayList;
+
+/**
+ * A viewgroup with utility methods for drag-n-drop and touch interception
+ */
+public abstract class BaseDragLayer<T extends BaseDraggingActivity> extends InsettableFrameLayout {
+
+    protected final int[] mTmpXY = new int[2];
+    protected final Rect mHitRect = new Rect();
+
+    protected final T mActivity;
+
+    protected TouchController[] mControllers;
+    protected TouchController mActiveController;
+    private TouchCompleteListener mTouchCompleteListener;
+
+    public BaseDragLayer(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mActivity = (T) BaseActivity.fromContext(context);
+    }
+
+
+    public boolean isEventOverView(View view, MotionEvent ev) {
+        getDescendantRectRelativeToSelf(view, mHitRect);
+        return mHitRect.contains((int) ev.getX(), (int) ev.getY());
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+        int action = ev.getAction();
+
+        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
+            if (mTouchCompleteListener != null) {
+                mTouchCompleteListener.onTouchComplete();
+            }
+            mTouchCompleteListener = null;
+        } else if (action == MotionEvent.ACTION_DOWN) {
+            mActivity.finishAutoCancelActionMode();
+        }
+        return findActiveController(ev);
+    }
+
+    protected boolean findActiveController(MotionEvent ev) {
+        mActiveController = null;
+
+        AbstractFloatingView topView = AbstractFloatingView.getTopOpenView(mActivity);
+        if (topView != null && topView.onControllerInterceptTouchEvent(ev)) {
+            mActiveController = topView;
+            return true;
+        }
+
+        for (TouchController controller : mControllers) {
+            if (controller.onControllerInterceptTouchEvent(ev)) {
+                mActiveController = controller;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
+        // Shortcuts can appear above folder
+        View topView = AbstractFloatingView.getTopOpenView(mActivity);
+        if (topView != null) {
+            if (child == topView) {
+                return super.onRequestSendAccessibilityEvent(child, event);
+            }
+            // Skip propagating onRequestSendAccessibilityEvent for all other children
+            // which are not topView
+            return false;
+        }
+        return super.onRequestSendAccessibilityEvent(child, event);
+    }
+
+    @Override
+    public void addChildrenForAccessibility(ArrayList<View> childrenForAccessibility) {
+        View topView = AbstractFloatingView.getTopOpenView(mActivity);
+        if (topView != null) {
+            // Only add the top view as a child for accessibility when it is open
+            childrenForAccessibility.add(topView);
+        } else {
+            super.addChildrenForAccessibility(childrenForAccessibility);
+        }
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        int action = ev.getAction();
+        if (action == MotionEvent.ACTION_UP || action == MotionEvent.ACTION_CANCEL) {
+            if (mTouchCompleteListener != null) {
+                mTouchCompleteListener.onTouchComplete();
+            }
+            mTouchCompleteListener = null;
+        }
+
+        if (mActiveController != null) {
+            return mActiveController.onControllerTouchEvent(ev);
+        } else {
+            // In case no child view handled the touch event, we may not get onIntercept anymore
+            return findActiveController(ev);
+        }
+    }
+
+    /**
+     * Determine the rect of the descendant in this DragLayer's coordinates
+     *
+     * @param descendant The descendant whose coordinates we want to find.
+     * @param r The rect into which to place the results.
+     * @return The factor by which this descendant is scaled relative to this DragLayer.
+     */
+    public float getDescendantRectRelativeToSelf(View descendant, Rect r) {
+        mTmpXY[0] = 0;
+        mTmpXY[1] = 0;
+        float scale = getDescendantCoordRelativeToSelf(descendant, mTmpXY);
+
+        r.set(mTmpXY[0], mTmpXY[1],
+                (int) (mTmpXY[0] + scale * descendant.getMeasuredWidth()),
+                (int) (mTmpXY[1] + scale * descendant.getMeasuredHeight()));
+        return scale;
+    }
+
+    public float getLocationInDragLayer(View child, int[] loc) {
+        loc[0] = 0;
+        loc[1] = 0;
+        return getDescendantCoordRelativeToSelf(child, loc);
+    }
+
+    public float getDescendantCoordRelativeToSelf(View descendant, int[] coord) {
+        return getDescendantCoordRelativeToSelf(descendant, coord, false);
+    }
+
+    /**
+     * Given a coordinate relative to the descendant, find the coordinate in this DragLayer's
+     * coordinates.
+     *
+     * @param descendant The descendant to which the passed coordinate is relative.
+     * @param coord The coordinate that we want mapped.
+     * @param includeRootScroll Whether or not to account for the scroll of the root descendant:
+     *          sometimes this is relevant as in a child's coordinates within the root descendant.
+     * @return The factor by which this descendant is scaled relative to this DragLayer. Caution
+     *         this scale factor is assumed to be equal in X and Y, and so if at any point this
+     *         assumption fails, we will need to return a pair of scale factors.
+     */
+    public float getDescendantCoordRelativeToSelf(View descendant, int[] coord,
+            boolean includeRootScroll) {
+        return Utilities.getDescendantCoordRelativeToAncestor(descendant, this,
+                coord, includeRootScroll);
+    }
+
+    /**
+     * Inverse of {@link #getDescendantCoordRelativeToSelf(View, int[])}.
+     */
+    public void mapCoordInSelfToDescendant(View descendant, int[] coord) {
+        Utilities.mapCoordInSelfToDescendant(descendant, this, coord);
+    }
+
+    public void getViewRectRelativeToSelf(View v, Rect r) {
+        int[] loc = new int[2];
+        getLocationInWindow(loc);
+        int x = loc[0];
+        int y = loc[1];
+
+        v.getLocationInWindow(loc);
+        int vX = loc[0];
+        int vY = loc[1];
+
+        int left = vX - x;
+        int top = vY - y;
+        r.set(left, top, left + v.getMeasuredWidth(), top + v.getMeasuredHeight());
+    }
+
+    @Override
+    public boolean dispatchUnhandledMove(View focused, int direction) {
+        // Consume the unhandled move if a container is open, to avoid switching pages underneath.
+        return AbstractFloatingView.getTopOpenView(mActivity) != null;
+    }
+
+    @Override
+    protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
+        View topView = AbstractFloatingView.getTopOpenView(mActivity);
+        if (topView != null) {
+            return topView.requestFocus(direction, previouslyFocusedRect);
+        } else {
+            return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
+        }
+    }
+
+    @Override
+    public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
+        View topView = AbstractFloatingView.getTopOpenView(mActivity);
+        if (topView != null) {
+            topView.addFocusables(views, direction);
+        } else {
+            super.addFocusables(views, direction, focusableMode);
+        }
+    }
+
+    public void setTouchCompleteListener(TouchCompleteListener listener) {
+        mTouchCompleteListener = listener;
+    }
+
+    public interface TouchCompleteListener {
+        void onTouchComplete();
+    }
+
+    @Override
+    public LayoutParams generateLayoutParams(AttributeSet attrs) {
+        return new LayoutParams(getContext(), attrs);
+    }
+
+    @Override
+    protected LayoutParams generateDefaultLayoutParams() {
+        return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
+    }
+
+    // Override to allow type-checking of LayoutParams.
+    @Override
+    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
+        return p instanceof LayoutParams;
+    }
+
+    @Override
+    protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) {
+        return new LayoutParams(p);
+    }
+
+    public static class LayoutParams extends InsettableFrameLayout.LayoutParams {
+        public int x, y;
+        public boolean customPosition = false;
+
+        public LayoutParams(Context c, AttributeSet attrs) {
+            super(c, attrs);
+        }
+
+        public LayoutParams(int width, int height) {
+            super(width, height);
+        }
+
+        public LayoutParams(ViewGroup.LayoutParams lp) {
+            super(lp);
+        }
+
+        public void setWidth(int width) {
+            this.width = width;
+        }
+
+        public int getWidth() {
+            return width;
+        }
+
+        public void setHeight(int height) {
+            this.height = height;
+        }
+
+        public int getHeight() {
+            return height;
+        }
+
+        public void setX(int x) {
+            this.x = x;
+        }
+
+        public int getX() {
+            return x;
+        }
+
+        public void setY(int y) {
+            this.y = y;
+        }
+
+        public int getY() {
+            return y;
+        }
+    }
+
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        super.onLayout(changed, l, t, r, b);
+        int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            View child = getChildAt(i);
+            final FrameLayout.LayoutParams flp = (FrameLayout.LayoutParams) child.getLayoutParams();
+            if (flp instanceof LayoutParams) {
+                final LayoutParams lp = (LayoutParams) flp;
+                if (lp.customPosition) {
+                    child.layout(lp.x, lp.y, lp.x + lp.width, lp.y + lp.height);
+                }
+            }
+        }
+    }
+}