Refactor / Cleanup / Simplify a bunch of dnd related rendering / animation

Addresses:
=> Fix folder icon drop location mapping (was very far off)
=> Fix BubbleTextView drop animation shifted by a few pixels
=> Get rid multiple unnecessary calls to setDragMode(none), was breaking
   some of the reorder flow; still some issues to address here.
=> Fix folder icon parallax (didn't work when the folder had a dot)

Test: manual

Change-Id: I5959cf341996f75d30212353ec096ed25bf40ea5
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index e3eb387..6c562cf 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -58,6 +58,7 @@
 import com.android.launcher3.anim.Interpolators;
 import com.android.launcher3.anim.PropertyListBuilder;
 import com.android.launcher3.config.FeatureFlags;
+import com.android.launcher3.dragndrop.DraggableView;
 import com.android.launcher3.folder.PreviewBackground;
 import com.android.launcher3.graphics.DragPreviewProvider;
 import com.android.launcher3.graphics.RotationMode;
@@ -105,6 +106,11 @@
     @Thunk final int[] mTmpPoint = new int[2];
     @Thunk final int[] mTempLocation = new int[2];
 
+    // Used to visualize / debug the Grid of the CellLayout
+    private static final boolean VISUALIZE_GRID = false;
+    private Rect mVisualizeGridRect = new Rect();
+    private Paint mVisualizeGridPaint = new Paint();
+
     private GridOccupancy mOccupied;
     private GridOccupancy mTmpOccupied;
 
@@ -483,6 +489,37 @@
             mFolderLeaveBehind.drawLeaveBehind(canvas);
             canvas.restore();
         }
+
+        if (VISUALIZE_GRID) {
+            visualizeGrid(canvas);
+        }
+    }
+
+    protected void visualizeGrid(Canvas canvas) {
+        mVisualizeGridRect.set(0, 0, mCellWidth, mCellHeight);
+        mVisualizeGridPaint.setStrokeWidth(4);
+
+        for (int i = 0; i < mCountX; i++) {
+            for (int j = 0; j < mCountY; j++) {
+                canvas.save();
+
+                int transX = i * mCellWidth;
+                int transY = j * mCellHeight;
+
+                canvas.translate(getPaddingLeft() + transX, getPaddingTop() + transY);
+
+                mVisualizeGridPaint.setStyle(Paint.Style.FILL);
+                mVisualizeGridPaint.setColor(Color.argb(80, 255, 100, 100));
+
+                canvas.drawRect(mVisualizeGridRect, mVisualizeGridPaint);
+
+                mVisualizeGridPaint.setStyle(Paint.Style.STROKE);
+                mVisualizeGridPaint.setColor(Color.argb(255, 255, 100, 100));
+
+                canvas.drawRect(mVisualizeGridRect, mVisualizeGridPaint);
+                canvas.restore();
+            }
+        }
     }
 
     @Override
@@ -949,8 +986,8 @@
         return false;
     }
 
-    void visualizeDropLocation(View v, DragPreviewProvider outlineProvider, int cellX, int cellY,
-            int spanX, int spanY, boolean resize, DropTarget.DragObject dragObject) {
+    void visualizeDropLocation(DraggableView v, DragPreviewProvider outlineProvider, int cellX, int
+            cellY, int spanX, int spanY, boolean resize, DropTarget.DragObject dragObject) {
         final int oldDragCellX = mDragCell[0];
         final int oldDragCellY = mDragCell[1];
 
@@ -960,9 +997,6 @@
 
         Bitmap dragOutline = outlineProvider.generatedDragOutline;
         if (cellX != oldDragCellX || cellY != oldDragCellY) {
-            Point dragOffset = dragObject.dragView.getDragVisualizeOffset();
-            Rect dragRegion = dragObject.dragView.getDragRegion();
-
             mDragCell[0] = cellX;
             mDragCell[1] = cellY;
 
@@ -971,50 +1005,27 @@
             mDragOutlineCurrent = (oldIndex + 1) % mDragOutlines.length;
             Rect r = mDragOutlines[mDragOutlineCurrent];
 
+            cellToRect(cellX, cellY, spanX, spanY, r);
+            int left = r.left;
+            int top = r.top;
+
+            int width = dragOutline.getWidth();
+            int height = dragOutline.getHeight();
+
             if (resize) {
-                cellToRect(cellX, cellY, spanX, spanY, r);
-                if (v instanceof LauncherAppWidgetHostView) {
-                    DeviceProfile profile = mActivity.getWallpaperDeviceProfile();
-                    Utilities.shrinkRect(r, profile.appWidgetScale.x, profile.appWidgetScale.y);
-                }
-            } else {
-                // Find the top left corner of the rect the object will occupy
-                final int[] topLeft = mTmpPoint;
-                cellToPoint(cellX, cellY, topLeft);
-
-                int left = topLeft[0];
-                int top = topLeft[1];
-
-                if (v != null && dragOffset == null) {
-                    // When drawing the drag outline, it did not account for margin offsets
-                    // added by the view's parent.
-                    MarginLayoutParams lp = (MarginLayoutParams) v.getLayoutParams();
-                    left += lp.leftMargin;
-                    top += lp.topMargin;
-
-                    // Offsets due to the size difference between the View and the dragOutline.
-                    // There is a size difference to account for the outer blur, which may lie
-                    // outside the bounds of the view.
-                    top += ((mCellHeight * spanY) - dragOutline.getHeight()) / 2;
-                    // We center about the x axis
-                    left += ((mCellWidth * spanX) - dragOutline.getWidth()) / 2;
-                } else {
-                    if (dragOffset != null && dragRegion != null) {
-                        // Center the drag region *horizontally* in the cell and apply a drag
-                        // outline offset
-                        left += dragOffset.x + ((mCellWidth * spanX) - dragRegion.width()) / 2;
-                        int cHeight = getShortcutsAndWidgets().getCellContentHeight();
-                        int cellPaddingY = (int) Math.max(0, ((mCellHeight - cHeight) / 2f));
-                        top += dragOffset.y + cellPaddingY;
-                    } else {
-                        // Center the drag outline in the cell
-                        left += ((mCellWidth * spanX) - dragOutline.getWidth()) / 2;
-                        top += ((mCellHeight * spanY) - dragOutline.getHeight()) / 2;
-                    }
-                }
-                r.set(left, top, left + dragOutline.getWidth(), top + dragOutline.getHeight());
+                width = r.width();
+                height = r.height();
             }
 
+            if (v != null && v.getViewType() == DraggableView.DRAGGABLE_ICON) {
+                left +=  ((mCellWidth * spanX) - dragOutline.getWidth()) / 2;
+                int cHeight = getShortcutsAndWidgets().getCellContentHeight();
+                int cellPaddingY = (int) Math.max(0, ((mCellHeight - cHeight) / 2f));
+                top += cellPaddingY;
+            }
+
+            r.set(left, top, left + width, top + height);
+
             Utilities.scaleRectAboutCenter(r, mChildScale);
             mDragOutlineAnims[mDragOutlineCurrent].setTag(dragOutline);
             mDragOutlineAnims[mDragOutlineCurrent].animateIn();
@@ -1900,7 +1911,7 @@
 
     // This method starts or changes the reorder preview animations
     private void beginOrAdjustReorderPreviewAnimations(ItemConfiguration solution,
-            View dragView, int delay, int mode) {
+            View dragView, int mode) {
         int childCount = mShortcutsAndWidgets.getChildCount();
         for (int i = 0; i < childCount; i++) {
             View child = mShortcutsAndWidgets.getChildAt(i);
@@ -1967,6 +1978,8 @@
 
             this.child = child;
             this.mode = mode;
+
+            // TODO issue!
             setInitialAnimationValues(false);
             finalScale = (mChildScale - (CHILD_DIVIDEND / child.getWidth())) * initScale;
             finalDeltaX = initDeltaX;
@@ -2162,6 +2175,8 @@
     */
     private void getDirectionVectorForDrop(int dragViewCenterX, int dragViewCenterY, int spanX,
             int spanY, View dragView, int[] resultDirection) {
+
+        //TODO(adamcohen) b/151776141 use the items visual center for the direction vector
         int[] targetDestination = new int[2];
 
         findNearestArea(dragViewCenterX, dragViewCenterY, spanX, spanY, targetDestination);
@@ -2272,7 +2287,7 @@
                 setItemPlacementDirty(false);
             } else {
                 beginOrAdjustReorderPreviewAnimations(swapSolution, dragView,
-                        REORDER_ANIMATION_DURATION, ReorderPreviewAnimation.MODE_PREVIEW);
+                        ReorderPreviewAnimation.MODE_PREVIEW);
             }
             mShortcutsAndWidgets.requestLayout();
         }
@@ -2326,7 +2341,7 @@
 
         if (mode == MODE_SHOW_REORDER_HINT) {
             if (finalSolution != null) {
-                beginOrAdjustReorderPreviewAnimations(finalSolution, dragView, 0,
+                beginOrAdjustReorderPreviewAnimations(finalSolution, dragView,
                         ReorderPreviewAnimation.MODE_HINT);
                 result[0] = finalSolution.cellX;
                 result[1] = finalSolution.cellY;
@@ -2366,7 +2381,7 @@
                     setItemPlacementDirty(false);
                 } else {
                     beginOrAdjustReorderPreviewAnimations(finalSolution, dragView,
-                            REORDER_ANIMATION_DURATION,  ReorderPreviewAnimation.MODE_PREVIEW);
+                            ReorderPreviewAnimation.MODE_PREVIEW);
                 }
             }
         } else {