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Commit dbf08b4a authored by Tony Wickham's avatar Tony Wickham
Browse files

Stop jumping to workspace from hotseat on quick drop. 

Regression occurred in ag/1315317.

In that change, Launcher#enterSpringLoadedDragMode() was moved from
the end of startDrag() to the end of onDragStart(). This changed the
sequence of events from:

beginDragShared() --> DragController#startDrag() --> onDragStart -->
dropTarget.onDragOver() --> Launcher#enterSpringLoadedDragMode()

to:

beginDragShared() --> DragController#startDrag() --> onDragStart -->
Launcher#enterSpringLoadedDragMode() --> onDragOver()

Basically, the key difference is that onDragOver() is called after
enterSpringLoadedDragMode(). This matters, because onDragOver()
returns early if Workspace#transitionStateShouldAllowDrop() returns
false, which it does during the spring loaded transition. This meant
that onDragOver() didn't update the layout to be Hotseat, and thus
the current workspace page was used as default, since that is what
was set in onDragEnter(). To fix it, I've copied the logic in
onDragOver() that checks to see if the drag is over the hotseat first
to a new method that onDragEnter() now calls as well.

Bug: 31245181
Change-Id: Ie758921b25fc96516a09c32bdc9706da941522df
parent 41253866

src/com/android/launcher3/Workspace.java

+42 −41
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ import android.animation.PropertyValuesHolder; 
import android.animation.ValueAnimator;

import android.animation.ValueAnimator.AnimatorUpdateListener;

import android.annotation.SuppressLint;

import android.annotation.TargetApi;

import android.app.WallpaperManager;

import android.appwidget.AppWidgetHostView;

import android.appwidget.AppWidgetProviderInfo;
@@ -39,7 +38,6 @@ import android.graphics.Point; 
import android.graphics.PointF;

import android.graphics.Rect;

import android.graphics.drawable.Drawable;

import android.os.Build;

import android.os.Handler;

import android.os.IBinder;

import android.os.Parcelable;
@@ -2800,9 +2798,7 @@ public class Workspace extends PagedView 
        mAddToExistingFolderOnDrop = false;



        mDropToLayout = null;

        CellLayout layout = getCurrentDropLayout();

        setCurrentDropLayout(layout);

        setCurrentDragOverlappingLayout(layout);

        setDropLayoutForDragObject(d);



        if (!workspaceInModalState() && FeatureFlags.LAUNCHER3_LEGACY_WORKSPACE_DND) {

            mLauncher.getDragLayer().showPageHints();
@@ -3061,7 +3057,6 @@ public class Workspace extends PagedView 
        // Skip drag over events while we are dragging over side pages

        if (mInScrollArea || !transitionStateShouldAllowDrop()) return;



        CellLayout layout = null;

        ItemInfo item = d.dragInfo;

        if (item == null) {

            if (ProviderConfig.IS_DOGFOOD_BUILD) {
@@ -3075,44 +3070,16 @@ public class Workspace extends PagedView 
        mDragViewVisualCenter = d.getVisualCenter(mDragViewVisualCenter);



        final View child = (mDragInfo == null) ? null : mDragInfo.cell;

        // Identify whether we have dragged over a side page

        if (workspaceInModalState()) {

            if (mLauncher.getHotseat() != null && !isDragWidget(d)) {

                if (isPointInSelfOverHotseat(d.x, d.y)) {

                    layout = mLauncher.getHotseat().getLayout();

                }

            }

            if (layout == null) {

                layout = findMatchingPageForDragOver(d.dragView, d.x, d.y, false);

            }

            if (layout != mDragTargetLayout) {

                setCurrentDropLayout(layout);

                setCurrentDragOverlappingLayout(layout);



        if (setDropLayoutForDragObject(d)) {

            boolean isInSpringLoadedMode = (mState == State.SPRING_LOADED);

            if (isInSpringLoadedMode) {

                    if (mLauncher.isHotseatLayout(layout)) {

                if (mLauncher.isHotseatLayout(mDragTargetLayout)) {

                    mSpringLoadedDragController.cancel();

                } else {

                    mSpringLoadedDragController.setAlarm(mDragTargetLayout);

                }

            }

        }

        } else {

            // Test to see if we are over the hotseat otherwise just use the current page

            if (mLauncher.getHotseat() != null && !isDragWidget(d)) {

                if (isPointInSelfOverHotseat(d.x, d.y)) {

                    layout = mLauncher.getHotseat().getLayout();

                }

            }

            if (layout == null) {

                layout = getCurrentDropLayout();

            }

            if (layout != mDragTargetLayout) {

                setCurrentDropLayout(layout);

                setCurrentDragOverlappingLayout(layout);

            }

        }



        // Handle the drag over

        if (mDragTargetLayout != null) {
@@ -3176,6 +3143,40 @@ public class Workspace extends PagedView 
        }

    }



    /**

     * Updates {@link #mDragTargetLayout} and {@link #mDragOverlappingLayout}

     * based on the DragObject's position.

     *

     * The layout will be:

     * - The Hotseat if the drag object is over it

     * - A side page if we are in spring-loaded mode and the drag object is over it

     * - The current page otherwise

     *

     * @return whether the layout is different from the current {@link #mDragTargetLayout}.

     */

    private boolean setDropLayoutForDragObject(DragObject d) {

        CellLayout layout = null;

        // Test to see if we are over the hotseat first

        if (mLauncher.getHotseat() != null && !isDragWidget(d)) {

            if (isPointInSelfOverHotseat(d.x, d.y)) {

                layout = mLauncher.getHotseat().getLayout();

            }

        }

        if (layout == null) {

            // Identify whether we have dragged over a side page,

            // otherwise just use the current page

            layout = workspaceInModalState() ?

                    findMatchingPageForDragOver(d.dragView, d.x, d.y, false)

                    : getCurrentDropLayout();

        }

        if (layout != mDragTargetLayout) {

            setCurrentDropLayout(layout);

            setCurrentDragOverlappingLayout(layout);

            return true;

        }

        return false;

    }



    private void manageFolderFeedback(CellLayout targetLayout,

            int[] targetCell, float distance, DragObject dragObject) {

        if (distance > mMaxDistanceForFolderCreation) return;