CM Easy Mode File Manager Navigation fixes

This patch fixes an issue where the user cannot
get back to easy mode without exiting and re-entering
the application in certain situations

Repro Steps:
1) Select "All" in the easy mode list
2) Action Bar arrow is gone, pressing back on the navbar
does not return you to easy mode

Change-Id: I5f6b47b8b69e57cffac77f7bfa24f8a75d8ff1d4
(cherry picked from commit c5c685221337c3c0b1f13ef20423de56fdba8870)
(cherry picked from commit 7cf35abef8a342effac7dff4b2b401a9d4514e89)

2 files changed, 40 insertions, 4 deletions

diff --git a/res/layout/navigation.xml b/res/layout/navigation.xml
index e457d1b9..fad876ad 100644
--- a/res/layout/navigation.xml
+++ b/res/layout/navigation.xml
@@ -46,7 +46,7 @@
                     android:layout_width="match_parent"
                     android:minHeight="?android:attr/actionBarSize"
                     android:background="?android:attr/colorPrimary"
-                    android:theme="@style/FileManager.Widget.ActionBar.White"/>
+                    android:theme="@android:style/Theme.Material"/>
 
             <!-- Navigation View -->
             <com.cyanogenmod.filemanager.ui.widgets.NavigationView
diff --git a/src/com/cyanogenmod/filemanager/activities/NavigationActivity.java b/src/com/cyanogenmod/filemanager/activities/NavigationActivity.java
index a3af6b56..b296a402 100644
--- a/src/com/cyanogenmod/filemanager/activities/NavigationActivity.java
+++ b/src/com/cyanogenmod/filemanager/activities/NavigationActivity.java
@@ -478,6 +478,8 @@ public class NavigationActivity extends Activity
 
     private int mOrientation;
 
+    private boolean mNeedsEasyMode = false;
+
     /**
      * @hide
      */
@@ -688,6 +690,16 @@ public class NavigationActivity extends Activity
         if (mDrawerToggle.onOptionsItemSelected(item)) {
           return true;
         }
+
+        if (mNeedsEasyMode) {
+            if (item.getItemId() == android.R.id.home) {
+                if (mHistory.size() == 0 && !isEasyModeVisible()) {
+                    performShowEasyMode();
+                } else {
+                    back();
+                }
+            }
+        }
         return super.onOptionsItemSelected(item);
     }
 
@@ -973,6 +985,7 @@ public class NavigationActivity extends Activity
     private void performShowEasyMode() {
         mEasyModeListView.setVisibility(View.VISIBLE);
         getCurrentNavigationView().setVisibility(View.GONE);
+        performShowBackArrow(false);
     }
 
     /**
@@ -983,6 +996,16 @@ public class NavigationActivity extends Activity
         getCurrentNavigationView().setVisibility(View.VISIBLE);
     }
 
+    private void performShowBackArrow(boolean showBackArrow) {
+        if (mNeedsEasyMode) {
+            mDrawerToggle.setDrawerIndicatorEnabled(!showBackArrow);
+        }
+    }
+
+    private boolean isEasyModeVisible() {
+        return mEasyModeListView.getVisibility() != View.GONE;
+    }
+
     /**
      * Method takes a bookmark as argument and adds it to the bookmark list in
      * the drawer
@@ -1089,6 +1112,7 @@ public class NavigationActivity extends Activity
                         } else {
                             performHideEasyMode();
                         }
+                        performShowBackArrow(!mDrawerToggle.isDrawerIndicatorEnabled());
                         getCurrentNavigationView().open(fso);
                         mDrawerLayout.closeDrawer(Gravity.START);
                     }
@@ -1464,7 +1488,9 @@ public class NavigationActivity extends Activity
         intent.putExtra(SearchManager.QUERY, "*"); // Use wild-card '*'
 
         if (position == 0) {
+            // the user has selected all items, they want to see their folders so let's do that.
             performHideEasyMode();
+            performShowBackArrow(true);
             return;
 
         } else {
@@ -1643,8 +1669,9 @@ public class NavigationActivity extends Activity
             }
         }
 
-        needsEasyMode = needsEasyMode
-                && getResources().getBoolean(R.bool.cmcc_show_easy_mode);
+        mNeedsEasyMode = getResources().getBoolean(R.bool.cmcc_show_easy_mode);
+
+        needsEasyMode = needsEasyMode && mNeedsEasyMode;
         if (needsEasyMode) {
             performShowEasyMode();
         } else {
@@ -1734,6 +1761,11 @@ public class NavigationActivity extends Activity
         if (checkBackAction()) {
             performHideEasyMode();
             return;
+        } else {
+            if (mNeedsEasyMode && !isEasyModeVisible()) {
+                performShowEasyMode();
+                return;
+            }
         }
 
         // An exit event has occurred, force the destroy the consoles
@@ -2120,7 +2152,11 @@ public class NavigationActivity extends Activity
             //Communicate the user that the next time the application will be closed
             this.mExitBackTimeout = System.currentTimeMillis();
             DialogHelper.showToast(this, R.string.msgs_push_again_to_exit, Toast.LENGTH_SHORT);
-            return true;
+            if (mNeedsEasyMode) {
+                return isEasyModeVisible();
+            } else {
+                return true;
+            }
         }
 
         //Back action not applied