From 10b1737910ea7890ca95bbbe5363fd5aa513b856 Mon Sep 17 00:00:00 2001
From: Adam Cohen <adamcohen@google.com>
Date: Fri, 15 Apr 2011 14:21:25 -0700
Subject: Fixing folder creation for drops from other folders

-> also fixed a bug where item wasn't being properly removed
   from source after creating a folder

Change-Id: Ie3932b1eec13929a07e6387d15754fd0604dd80a
---
 src/com/android/launcher2/Workspace.java | 70 +++++++++++++++++++++++---------
 1 file changed, 51 insertions(+), 19 deletions(-)

diff --git a/src/com/android/launcher2/Workspace.java b/src/com/android/launcher2/Workspace.java
index 66f1ceb9c..98cf62bbe 100644
--- a/src/com/android/launcher2/Workspace.java
+++ b/src/com/android/launcher2/Workspace.java
@@ -2273,6 +2273,48 @@ public class Workspace extends SmoothPagedView
         return true;
     }
 
+    boolean createUserFolderIfNecessary(View newView, CellLayout target, int originX,
+            int originY, boolean external) {
+        int spanX = mDragInfo != null ? mDragInfo.spanX : 1;
+        int spanY = mDragInfo != null ? mDragInfo.spanY : 1;
+
+        // First we find the cell nearest to point at which the item is dropped, without
+        // any consideration to whether there is an item there.
+        mTargetCell = findNearestArea(originX, originY,
+                spanX, spanY, target,
+                mTargetCell);
+
+        View v = target.getChildAt(mTargetCell[0], mTargetCell[1]);
+        boolean hasntMoved = mDragInfo != null && (mDragInfo.cellX == mTargetCell[0] &&
+                mDragInfo.cellY == mTargetCell[1]);
+
+        if (v == null || hasntMoved) return false;
+
+        final int screen = (mTargetCell == null) ?
+                mDragInfo.screen : indexOfChild(target);
+
+        boolean aboveShortcut = (v.getTag() instanceof ShortcutInfo);
+        boolean willBecomeShortcut = (newView.getTag() instanceof ShortcutInfo);
+
+        if (aboveShortcut && willBecomeShortcut) {
+            ShortcutInfo sourceInfo = (ShortcutInfo) newView.getTag();
+            ShortcutInfo destInfo = (ShortcutInfo) v.getTag();
+            // if the drag started here, we need to remove it from the workspace
+            if (!external) {
+                int fromScreen = mDragInfo.screen;
+                CellLayout sourceLayout = (CellLayout) getChildAt(fromScreen);
+                sourceLayout.removeView(newView);
+            }
+
+            target.removeView(v);
+            FolderIcon fi = mLauncher.addFolder(screen, mTargetCell[0], mTargetCell[1]);
+            fi.addItem(destInfo);
+            fi.addItem(sourceInfo);
+            return true;
+        }
+        return false;
+    }
+
     public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {
 
@@ -2317,30 +2359,13 @@ public class Workspace extends SmoothPagedView
 
             if (dropTargetLayout != null) {
                 // Move internally
-
-                // First we find the cell nearest to point at which the item is dropped, without
-                // any consideration to whether there is an item there.
-                mTargetCell = findNearestArea((int) mDragViewVisualCenter[0],
-                        (int) mDragViewVisualCenter[1], mDragInfo.spanX, mDragInfo.spanY,
-                        dropTargetLayout, mTargetCell);
-
                 final int screen = (mTargetCell == null) ?
                         mDragInfo.screen : indexOfChild(dropTargetLayout);
 
-                View v = dropTargetLayout.getChildAt(mTargetCell[0], mTargetCell[1]);
-                boolean hasMoved = !(mDragInfo.cellX == mTargetCell[0] &&
-                        mDragInfo.cellY == mTargetCell[1]);
-
                 // If the item being dropped is a shortcut and the nearest drop cell also contains
                 // a shortcut, then create a folder with the two shortcuts.
-                if (v != null && (v.getTag() instanceof ShortcutInfo) &&
-                        dragInfo instanceof ShortcutInfo && hasMoved) {
-                    ShortcutInfo info1 = (ShortcutInfo) v.getTag();
-                    ShortcutInfo info2 = (ShortcutInfo) dragInfo;
-                    dropTargetLayout.removeView(v);
-                    FolderIcon fi = mLauncher.addFolder(screen, mTargetCell[0], mTargetCell[1]);
-                    fi.addItem(info1);
-                    fi.addItem(info2);
+                if (createUserFolderIfNecessary(cell, dropTargetLayout,
+                        (int) mDragViewVisualCenter[0], (int) mDragViewVisualCenter[1], false)) {
                     return;
                 }
 
@@ -2967,6 +2992,13 @@ public class Workspace extends SmoothPagedView
                 throw new IllegalStateException("Unknown item type: " + info.itemType);
             }
 
+            // If the item being dropped is a shortcut and the nearest drop cell also contains
+            // a shortcut, then create a folder with the two shortcuts.
+            if (touchXY != null && createUserFolderIfNecessary(view, cellLayout, touchXY[0],
+                  touchXY[1], true)) {
+                return;
+            }
+
             mTargetCell = new int[2];
             if (touchXY != null) {
                 // when dragging and dropping, just find the closest free spot
-- 
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