From d139b0aa7d03f676dc7869dc5b39fd9f24ff0a1d Mon Sep 17 00:00:00 2001
From: Sunny Goyal <sunnygoyal@google.com>
Date: Mon, 12 Sep 2016 14:36:30 -0700
Subject: Adding support for multiwindow drag and drop

Change-Id: I95b46e3c3f1238307d3ef5a6c81a8e530ba0987a
---
 src/com/android/launcher3/dragndrop/DragLayer.java | 61 ++++++++++++++++++++--
 1 file changed, 57 insertions(+), 4 deletions(-)

(limited to 'src/com/android/launcher3/dragndrop/DragLayer.java')

diff --git a/src/com/android/launcher3/dragndrop/DragLayer.java b/src/com/android/launcher3/dragndrop/DragLayer.java
index 58638288e..016347b17 100644
--- a/src/com/android/launcher3/dragndrop/DragLayer.java
+++ b/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -21,14 +21,22 @@ import android.animation.AnimatorListenerAdapter;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
 import android.animation.ValueAnimator.AnimatorUpdateListener;
+import android.annotation.TargetApi;
+import android.content.ClipDescription;
 import android.content.Context;
+import android.content.Intent;
 import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.Point;
 import android.graphics.Rect;
 import android.graphics.Region;
 import android.graphics.drawable.Drawable;
+import android.os.Build;
 import android.util.AttributeSet;
+import android.util.Log;
 import android.view.DragEvent;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -45,12 +53,14 @@ import com.android.launcher3.AppWidgetResizeFrame;
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DropTargetBar;
 import com.android.launcher3.InsettableFrameLayout;
+import com.android.launcher3.InstallShortcutReceiver;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetHostView;
 import com.android.launcher3.PinchToOverviewListener;
 import com.android.launcher3.R;
 import com.android.launcher3.ShortcutAndWidgetContainer;
+import com.android.launcher3.ShortcutInfo;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.allapps.AllAppsTransitionController;
@@ -62,6 +72,7 @@ import com.android.launcher3.shortcuts.DeepShortcutsContainer;
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.util.TouchController;
 
+import java.net.URISyntaxException;
 import java.util.ArrayList;
 
 /**
@@ -431,8 +442,46 @@ public class DragLayer extends InsettableFrameLayout {
         return false;
     }
 
+    @TargetApi(Build.VERSION_CODES.N)
+    private void handleSystemDragStart(DragEvent event) {
+        if (!FeatureFlags.LAUNCHER3_USE_SYSTEM_DRAG_DRIVER || !Utilities.isNycOrAbove()) {
+            return;
+        }
+        if (mLauncher.isWorkspaceLocked()) {
+            return;
+        }
+
+        ClipDescription description = event.getClipDescription();
+        if (!description.hasMimeType(ClipDescription.MIMETYPE_TEXT_INTENT)) {
+            return;
+        }
+        ShortcutInfo info = new ShortcutInfo();
+        // Set a dummy intent until we get the final value
+        info.intent = new Intent();
+
+        // Since we are not going through the workspace for starting the drag, set drag related
+        // information on the workspace before starting the drag.
+        ExternalDragPreviewProvider previewProvider =
+                new ExternalDragPreviewProvider(mLauncher, info);
+        mLauncher.getWorkspace().prepareDragWithProvider(previewProvider);
+
+        DragOptions options = new DragOptions();
+        options.systemDndStartPoint = new Point((int) event.getX(), (int) event.getY());
+
+        int halfPadding = previewProvider.previewPadding / 2;
+        mDragController.startDrag(
+                Bitmap.createBitmap(1, 1, Config.ARGB_8888),
+                0, 0,
+                new AnotherWindowDragSource(mLauncher), info,
+                new Point(- halfPadding, halfPadding),
+                previewProvider.getPreviewBounds(), 1f, options);
+    }
+
     @Override
     public boolean onDragEvent (DragEvent event) {
+        if (event.getAction() == DragEvent.ACTION_DRAG_STARTED) {
+            handleSystemDragStart(event);
+        }
         return mDragController.onDragEvent(event);
     }
 
@@ -758,11 +807,15 @@ public class DragLayer extends InsettableFrameLayout {
 
         // If duration < 0, this is a cue to compute the duration based on the distance
         if (duration < 0) {
-            duration = res.getInteger(R.integer.config_dropAnimMaxDuration);
-            if (dist < maxDist) {
-                duration *= mCubicEaseOutInterpolator.getInterpolation(dist / maxDist);
+            if (mDragController != null && mDragController.isExternalDrag()) {
+                duration = 1;
+            } else {
+                duration = res.getInteger(R.integer.config_dropAnimMaxDuration);
+                if (dist < maxDist) {
+                    duration *= mCubicEaseOutInterpolator.getInterpolation(dist / maxDist);
+                }
+                duration = Math.max(duration, res.getInteger(R.integer.config_dropAnimMinDuration));
             }
-            duration = Math.max(duration, res.getInteger(R.integer.config_dropAnimMinDuration));
         }
 
         // Fall back to cubic ease out interpolator for the animation if none is specified
-- 
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