Save directory state and animate.

Save scroll position and restore when rotating or going up the
directory stack.  Also show directory animations when navigating
the directory stack.

Bug: 10417201
Change-Id: Ia2c508debc2bffffe6306eb9078afefef259dfe2

10 files changed, 290 insertions, 29 deletions

diff --git a/packages/DocumentsUI/res/animator/dir_down.xml b/packages/DocumentsUI/res/animator/dir_down.xml
new file mode 100644
index 0000000..7f547f1
--- /dev/null
+++ b/packages/DocumentsUI/res/animator/dir_down.xml
@@ -0,0 +1,22 @@
+<!-- Copyright (C) 2013 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.
+-->
+
+<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:valueFrom="1"
+    android:valueTo="0"
+    android:propertyName="position"
+    android:valueType="floatType"
+    android:duration="@android:integer/config_mediumAnimTime"
+    android:interpolator="@android:interpolator/decelerate_quad" />
diff --git a/packages/DocumentsUI/res/animator/dir_frozen.xml b/packages/DocumentsUI/res/animator/dir_frozen.xml
new file mode 100644
index 0000000..b541d13
--- /dev/null
+++ b/packages/DocumentsUI/res/animator/dir_frozen.xml
@@ -0,0 +1,21 @@
+<!-- Copyright (C) 2013 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.
+-->
+
+<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:valueFrom="0"
+    android:valueTo="0"
+    android:propertyName="position"
+    android:valueType="floatType"
+    android:duration="@android:integer/config_mediumAnimTime" />
diff --git a/packages/DocumentsUI/res/animator/dir_up.xml b/packages/DocumentsUI/res/animator/dir_up.xml
new file mode 100644
index 0000000..fda0faf
--- /dev/null
+++ b/packages/DocumentsUI/res/animator/dir_up.xml
@@ -0,0 +1,22 @@
+<!-- Copyright (C) 2013 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.
+-->
+
+<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
+    android:valueFrom="0"
+    android:valueTo="1"
+    android:propertyName="position"
+    android:valueType="floatType"
+    android:duration="@android:integer/config_mediumAnimTime"
+    android:interpolator="@android:interpolator/accelerate_quad" />
diff --git a/packages/DocumentsUI/res/drawable-xhdpi/ic_dir_shadow.9.png b/packages/DocumentsUI/res/drawable-xhdpi/ic_dir_shadow.9.png
new file mode 100644
index 0000000..0240874
--- /dev/null
+++ b/packages/DocumentsUI/res/drawable-xhdpi/ic_dir_shadow.9.png
diff --git a/packages/DocumentsUI/res/layout/activity.xml b/packages/DocumentsUI/res/layout/activity.xml
index ff28e41..9937c39 100644
--- a/packages/DocumentsUI/res/layout/activity.xml
+++ b/packages/DocumentsUI/res/layout/activity.xml
@@ -24,7 +24,7 @@
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <FrameLayout
+        <com.android.documentsui.DirectoryContainerView
             android:id="@+id/container_directory"
             android:layout_width="match_parent"
             android:layout_height="0dip"
diff --git a/packages/DocumentsUI/res/layout/fragment_directory.xml b/packages/DocumentsUI/res/layout/fragment_directory.xml
index b4138a5..07bf127 100644
--- a/packages/DocumentsUI/res/layout/fragment_directory.xml
+++ b/packages/DocumentsUI/res/layout/fragment_directory.xml
@@ -14,9 +14,10 @@
      limitations under the License.
 -->
 
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<com.android.documentsui.DirectoryView xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:background="@drawable/ic_dir_shadow">
 
     <TextView
         android:id="@android:id/empty"
@@ -40,4 +41,4 @@
         android:listSelector="@android:color/transparent"
         android:visibility="gone" />
 
-</FrameLayout>
+</com.android.documentsui.DirectoryView>
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DirectoryContainerView.java b/packages/DocumentsUI/src/com/android/documentsui/DirectoryContainerView.java
new file mode 100644
index 0000000..77595b6
--- /dev/null
+++ b/packages/DocumentsUI/src/com/android/documentsui/DirectoryContainerView.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 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.documentsui;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.FrameLayout;
+
+import java.util.ArrayList;
+
+public class DirectoryContainerView extends FrameLayout {
+    private boolean mDisappearingFirst = false;
+
+    public DirectoryContainerView(Context context) {
+        super(context);
+        setClipChildren(false);
+    }
+
+    public DirectoryContainerView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setClipChildren(false);
+    }
+
+    @Override
+    protected void dispatchDraw(Canvas canvas) {
+        final ArrayList<View> disappearing = mDisappearingChildren;
+        if (mDisappearingFirst && disappearing != null) {
+            for (int i = 0; i < disappearing.size(); i++) {
+                super.drawChild(canvas, disappearing.get(i), getDrawingTime());
+            }
+        }
+        super.dispatchDraw(canvas);
+    }
+
+    @Override
+    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
+        if (mDisappearingFirst && mDisappearingChildren != null
+                && mDisappearingChildren.contains(child)) {
+            return false;
+        }
+        return super.drawChild(canvas, child, drawingTime);
+    }
+
+    public void setDrawDisappearingFirst(boolean disappearingFirst) {
+        mDisappearingFirst = disappearingFirst;
+    }
+}
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java b/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
index 198927c..5b6ec4d 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/DirectoryFragment.java
@@ -43,12 +43,14 @@ import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.CancellationSignal;
+import android.os.Parcelable;
 import android.provider.DocumentsContract;
 import android.provider.DocumentsContract.Document;
 import android.text.format.DateUtils;
 import android.text.format.Formatter;
 import android.text.format.Time;
 import android.util.Log;
+import android.util.SparseArray;
 import android.util.SparseBooleanArray;
 import android.view.ActionMode;
 import android.view.LayoutInflater;
@@ -96,7 +98,13 @@ public class DirectoryFragment extends Fragment {
     public static final int TYPE_SEARCH = 2;
     public static final int TYPE_RECENT_OPEN = 3;
 
+    public static final int ANIM_NONE = 1;
+    public static final int ANIM_SIDE = 2;
+    public static final int ANIM_DOWN = 3;
+    public static final int ANIM_UP = 4;
+
     private int mType = TYPE_NORMAL;
+    private String mStateKey;
 
     private int mLastMode = MODE_UNKNOWN;
     private int mLastSortOrder = SORT_ORDER_UNKNOWN;
@@ -113,39 +121,61 @@ public class DirectoryFragment extends Fragment {
     private static final String EXTRA_ROOT = "root";
     private static final String EXTRA_DOC = "doc";
     private static final String EXTRA_QUERY = "query";
+    private static final String EXTRA_IGNORE_STATE = "ignoreState";
 
     private static AtomicInteger sLoaderId = new AtomicInteger(4000);
 
     private final int mLoaderId = sLoaderId.incrementAndGet();
 
-    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc) {
-        show(fm, TYPE_NORMAL, root, doc, null);
+    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
+        show(fm, TYPE_NORMAL, root, doc, null, anim);
     }
 
-    public static void showSearch(FragmentManager fm, RootInfo root, String query) {
-        show(fm, TYPE_SEARCH, root, null, query);
+    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
+        show(fm, TYPE_SEARCH, root, null, query, anim);
     }
 
-    public static void showRecentsOpen(FragmentManager fm) {
-        show(fm, TYPE_RECENT_OPEN, null, null, null);
+    public static void showRecentsOpen(FragmentManager fm, int anim) {
+        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
     }
 
-    private static void show(
-            FragmentManager fm, int type, RootInfo root, DocumentInfo doc, String query) {
+    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
+            String query, int anim) {
         final Bundle args = new Bundle();
         args.putInt(EXTRA_TYPE, type);
         args.putParcelable(EXTRA_ROOT, root);
         args.putParcelable(EXTRA_DOC, doc);
         args.putString(EXTRA_QUERY, query);
 
+        final FragmentTransaction ft = fm.beginTransaction();
+        switch (anim) {
+            case ANIM_SIDE:
+                args.putBoolean(EXTRA_IGNORE_STATE, true);
+                break;
+            case ANIM_DOWN:
+                args.putBoolean(EXTRA_IGNORE_STATE, true);
+                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
+                break;
+            case ANIM_UP:
+                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
+                break;
+        }
+
         final DirectoryFragment fragment = new DirectoryFragment();
         fragment.setArguments(args);
 
-        final FragmentTransaction ft = fm.beginTransaction();
         ft.replace(R.id.container_directory, fragment);
         ft.commitAllowingStateLoss();
     }
 
+    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
+        final StringBuilder builder = new StringBuilder();
+        builder.append(root != null ? root.authority : "null").append(';');
+        builder.append(root != null ? root.rootId : "null").append(';');
+        builder.append(doc != null ? doc.documentId : "null");
+        return builder.toString();
+    }
+
     public static DirectoryFragment get(FragmentManager fm) {
         // TODO: deal with multiple directories shown at once
         return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
@@ -184,6 +214,7 @@ public class DirectoryFragment extends Fragment {
 
         mAdapter = new DocumentsAdapter();
         mType = getArguments().getInt(EXTRA_TYPE);
+        mStateKey = buildStateKey(root, doc);
 
         if (mType == TYPE_RECENT_OPEN) {
             // Hide titles when showing recents for picking images/videos
@@ -241,11 +272,16 @@ public class DirectoryFragment extends Fragment {
 
                 updateDisplayState();
 
-                if (mLastSortOrder != state.derivedSortOrder) {
-                    mLastSortOrder = state.derivedSortOrder;
+                // Restore any previous instance state
+                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
+                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
+                    getView().restoreHierarchyState(container);
+                } else if (mLastSortOrder != state.derivedSortOrder) {
                     mListView.smoothScrollToPosition(0);
                     mGridView.smoothScrollToPosition(0);
                 }
+
+                mLastSortOrder = state.derivedSortOrder;
             }
 
             @Override
@@ -261,6 +297,17 @@ public class DirectoryFragment extends Fragment {
     }
 
     @Override
+    public void onStop() {
+        super.onStop();
+
+        // Remember last scroll location
+        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
+        getView().saveHierarchyState(container);
+        final State state = getDisplayState(this);
+        state.dirState.put(mStateKey, container);
+    }
+
+    @Override
     public void onResume() {
         super.onResume();
         updateDisplayState();
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java b/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java
new file mode 100644
index 0000000..34cb14f
--- /dev/null
+++ b/packages/DocumentsUI/src/com/android/documentsui/DirectoryView.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2013 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.documentsui;
+
+import android.content.Context;
+import android.graphics.Rect;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.InsetDrawable;
+import android.util.AttributeSet;
+import android.widget.FrameLayout;
+
+public class DirectoryView extends FrameLayout {
+    private float mPosition = 0f;
+
+    private int mWidth;
+
+    public DirectoryView(Context context) {
+        super(context);
+    }
+
+    public DirectoryView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public void setBackground(Drawable background) {
+        final Rect rect = new Rect();
+        background.getPadding(rect);
+        final InsetDrawable inset = new InsetDrawable(background, -rect.left, 0, 0, 0);
+        super.setBackground(inset);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        mWidth = w;
+        setPosition(mPosition);
+    }
+
+    public float getPosition() {
+        return mPosition;
+    }
+
+    public void setPosition(float position) {
+        mPosition = position;
+        setX((mWidth > 0) ? (mPosition * mWidth) : 0);
+        setAlpha(1f - position);
+    }
+}
diff --git a/packages/DocumentsUI/src/com/android/documentsui/DocumentsActivity.java b/packages/DocumentsUI/src/com/android/documentsui/DocumentsActivity.java
index f6cb481..3b71f60 100644
--- a/packages/DocumentsUI/src/com/android/documentsui/DocumentsActivity.java
+++ b/packages/DocumentsUI/src/com/android/documentsui/DocumentsActivity.java
@@ -16,6 +16,10 @@
 
 package com.android.documentsui;
 
+import static com.android.documentsui.DirectoryFragment.ANIM_DOWN;
+import static com.android.documentsui.DirectoryFragment.ANIM_NONE;
+import static com.android.documentsui.DirectoryFragment.ANIM_SIDE;
+import static com.android.documentsui.DirectoryFragment.ANIM_UP;
 import static com.android.documentsui.DocumentsActivity.State.ACTION_CREATE;
 import static com.android.documentsui.DocumentsActivity.State.ACTION_GET_CONTENT;
 import static com.android.documentsui.DocumentsActivity.State.ACTION_MANAGE;
@@ -44,6 +48,7 @@ import android.graphics.drawable.InsetDrawable;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Parcel;
+import android.os.Parcelable;
 import android.provider.DocumentsContract;
 import android.provider.DocumentsContract.Root;
 import android.support.v4.app.ActionBarDrawerToggle;
@@ -51,6 +56,7 @@ import android.support.v4.view.GravityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.support.v4.widget.DrawerLayout.DrawerListener;
 import android.util.Log;
+import android.util.SparseArray;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -73,12 +79,14 @@ import com.android.documentsui.model.DocumentInfo;
 import com.android.documentsui.model.DocumentStack;
 import com.android.documentsui.model.DurableUtils;
 import com.android.documentsui.model.RootInfo;
+import com.google.common.collect.Maps;
 
 import libcore.io.IoUtils;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.HashMap;
 import java.util.List;
 
 public class DocumentsActivity extends Activity {
@@ -94,6 +102,8 @@ public class DocumentsActivity extends Activity {
     private ActionBarDrawerToggle mDrawerToggle;
     private View mRootsContainer;
 
+    private DirectoryContainerView mDirectoryContainer;
+
     private boolean mIgnoreNextNavigation;
     private boolean mIgnoreNextClose;
     private boolean mIgnoreNextCollapse;
@@ -165,6 +175,8 @@ public class DocumentsActivity extends Activity {
             mRootsContainer = findViewById(R.id.container_roots);
         }
 
+        mDirectoryContainer = (DirectoryContainerView) findViewById(R.id.container_directory);
+
         if (icicle != null) {
             mState = icicle.getParcelable(EXTRA_STATE);
         } else {
@@ -195,7 +207,7 @@ public class DocumentsActivity extends Activity {
             RootsFragment.show(getFragmentManager(), null);
         }
 
-        onCurrentDirectoryChanged();
+        onCurrentDirectoryChanged(ANIM_NONE);
     }
 
     private void buildDefaultState() {
@@ -397,7 +409,7 @@ public class DocumentsActivity extends Activity {
             public boolean onQueryTextSubmit(String query) {
                 mState.currentSearch = query;
                 mSearchView.clearFocus();
-                onCurrentDirectoryChanged();
+                onCurrentDirectoryChanged(ANIM_NONE);
                 return true;
             }
 
@@ -421,7 +433,7 @@ public class DocumentsActivity extends Activity {
                 }
 
                 mState.currentSearch = null;
-                onCurrentDirectoryChanged();
+                onCurrentDirectoryChanged(ANIM_NONE);
                 return true;
             }
         });
@@ -435,7 +447,7 @@ public class DocumentsActivity extends Activity {
                 }
 
                 mState.currentSearch = null;
-                onCurrentDirectoryChanged();
+                onCurrentDirectoryChanged(ANIM_NONE);
                 return false;
             }
         });
@@ -595,7 +607,7 @@ public class DocumentsActivity extends Activity {
         final int size = mState.stack.size();
         if (size > 1) {
             mState.stack.pop();
-            onCurrentDirectoryChanged();
+            onCurrentDirectoryChanged(ANIM_UP);
         } else if (size == 1 && !isRootsDrawerOpen()) {
             // TODO: open root drawer once we can capture back key
             super.onBackPressed();
@@ -690,7 +702,7 @@ public class DocumentsActivity extends Activity {
                 mState.stackTouched = true;
                 mState.stack.pop();
             }
-            onCurrentDirectoryChanged();
+            onCurrentDirectoryChanged(ANIM_UP);
             return true;
         }
     };
@@ -711,17 +723,19 @@ public class DocumentsActivity extends Activity {
         return mState;
     }
 
-    private void onCurrentDirectoryChanged() {
+    private void onCurrentDirectoryChanged(int anim) {
         final FragmentManager fm = getFragmentManager();
         final RootInfo root = getCurrentRoot();
         final DocumentInfo cwd = getCurrentDirectory();
 
+        mDirectoryContainer.setDrawDisappearingFirst(anim == ANIM_DOWN);
+
         if (cwd == null) {
             // No directory means recents
             if (mState.action == ACTION_CREATE) {
                 RecentsCreateFragment.show(fm);
             } else {
-                DirectoryFragment.showRecentsOpen(fm);
+                DirectoryFragment.showRecentsOpen(fm, anim);
 
                 // Start recents in relevant mode
                 final boolean acceptImages = MimePredicate.mimeMatches(
@@ -732,10 +746,10 @@ public class DocumentsActivity extends Activity {
         } else {
             if (mState.currentSearch != null) {
                 // Ongoing search
-                DirectoryFragment.showSearch(fm, root, mState.currentSearch);
+                DirectoryFragment.showSearch(fm, root, mState.currentSearch, anim);
             } else {
                 // Normal boring directory
-                DirectoryFragment.showNormal(fm, root, cwd);
+                DirectoryFragment.showNormal(fm, root, cwd, anim);
             }
         }
 
@@ -760,7 +774,7 @@ public class DocumentsActivity extends Activity {
     public void onStackPicked(DocumentStack stack) {
         mState.stack = stack;
         mState.stackTouched = true;
-        onCurrentDirectoryChanged();
+        onCurrentDirectoryChanged(ANIM_SIDE);
     }
 
     public void onRootPicked(RootInfo root, boolean closeDrawer) {
@@ -772,11 +786,14 @@ public class DocumentsActivity extends Activity {
         if (!mRoots.isRecentsRoot(root)) {
             try {
                 final Uri uri = DocumentsContract.buildDocumentUri(root.authority, root.documentId);
-                onDocumentPicked(DocumentInfo.fromUri(getContentResolver(), uri));
+                final DocumentInfo doc = DocumentInfo.fromUri(getContentResolver(), uri);
+                mState.stack.push(doc);
+                mState.stackTouched = true;
+                onCurrentDirectoryChanged(ANIM_SIDE);
             } catch (FileNotFoundException e) {
             }
         } else {
-            onCurrentDirectoryChanged();
+            onCurrentDirectoryChanged(ANIM_SIDE);
         }
 
         if (closeDrawer) {
@@ -798,7 +815,7 @@ public class DocumentsActivity extends Activity {
         if (doc.isDirectory()) {
             mState.stack.push(doc);
             mState.stackTouched = true;
-            onCurrentDirectoryChanged();
+            onCurrentDirectoryChanged(ANIM_DOWN);
         } else if (mState.action == ACTION_OPEN || mState.action == ACTION_GET_CONTENT) {
             // Explicit file picked, return
             onFinished(doc.derivedUri);
@@ -924,6 +941,9 @@ public class DocumentsActivity extends Activity {
         /** Currently active search, overriding any stack. */
         public String currentSearch;
 
+        /** Instance state for every shown directory */
+        public HashMap<String, SparseArray<Parcelable>> dirState = Maps.newHashMap();
+
         public static final int ACTION_OPEN = 1;
         public static final int ACTION_CREATE = 2;
         public static final int ACTION_GET_CONTENT = 3;
@@ -956,6 +976,7 @@ public class DocumentsActivity extends Activity {
             out.writeInt(stackTouched ? 1 : 0);
             DurableUtils.writeToParcel(out, stack);
             out.writeString(currentSearch);
+            out.writeMap(dirState);
         }
 
         public static final Creator<State> CREATOR = new Creator<State>() {
@@ -973,6 +994,7 @@ public class DocumentsActivity extends Activity {
                 state.stackTouched = in.readInt() != 0;
                 DurableUtils.readFromParcel(in, state.stack);
                 state.currentSearch = in.readString();
+                in.readMap(state.dirState, null);
                 return state;
             }