Refresh: stop refreshes in action

If a refresh happens while another refresh is occuring, make sure
that that old refresh is cancelled. In addition to this, remove some
old logic that conflicted with itself. Also, keep ahold of the previous directory
before running the task.

Ticket: QRDL-1002
Change-Id: Ibc1f3d468243bc124d3baf259af21464f3c03c84
(cherry picked from commit 080405b548865e6b118b56ca29ed6a6f0d10bcc5)

diff --git a/src/com/cyanogenmod/filemanager/ui/widgets/NavigationView.java b/src/com/cyanogenmod/filemanager/ui/widgets/NavigationView.java
index 7793a3d..ac8f166 100755 (executable)
--- a/src/com/cyanogenmod/filemanager/ui/widgets/NavigationView.java
+++ b/src/com/cyanogenmod/filemanager/ui/widgets/NavigationView.java
@@ -246,11 +246,6 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
             mNewDirChecked = checkChRootedNavigation(params[0]);
 
             //Check that it is really necessary change the directory
-            if (!mReload && NavigationView.this.mCurrentDir != null &&
-                    NavigationView.this.mCurrentDir.compareTo(mNewDirChecked) == 0) {
-                return null;
-            }
-
             mHasChanged = !(NavigationView.this.mCurrentDir != null &&
                     NavigationView.this.mCurrentDir.compareTo(mNewDirChecked) == 0);
             mIsNewHistory = (NavigationView.this.mCurrentDir != null);
@@ -385,13 +380,11 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
         @Override
         protected void onPostExecute(List<FileSystemObject> files) {
             // This means an exception. This method will be recalled then
-            if (files != null) {
-                onPostExecuteTask(files, mAddToHistory, mIsNewHistory, mHasChanged,
+            onPostExecuteTask(files, mAddToHistory, mIsNewHistory, mHasChanged,
                         mSearchInfo, mNewDirChecked, mScrollTo);
 
-                // Do animation
-                fadeEfect(false);
-            }
+            // Do animation
+            fadeEfect(false);
         }
 
         /**
@@ -418,6 +411,7 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
 
     private int mId;
     private String mCurrentDir;
+    private String mPreviousDir;
     private NavigationLayoutMode mCurrentMode;
     /**
      * @hide
@@ -512,7 +506,7 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
         //Return the persistent the data
         NavigationViewInfoParcelable parcel = new NavigationViewInfoParcelable();
         parcel.setId(this.mId);
-        parcel.setCurrentDir(this.mCurrentDir);
+        parcel.setCurrentDir(this.mPreviousDir);
         parcel.setChRooted(this.mChRooted);
         parcel.setSelectedFiles(this.mAdapter.getSelectedItems());
         parcel.setFiles(this.mFiles);
@@ -816,10 +810,15 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
      */
     public void refresh(FileSystemObject scrollTo) {
         //Check that current directory was set
-        if (this.mCurrentDir == null || this.mFiles == null || this.mNavigationTask != null) {
+        if (this.mCurrentDir == null || this.mFiles == null) {
             return;
         }
 
+        if (this.mNavigationTask != null) {
+            this.mNavigationTask.cancel(true);
+            this.mNavigationTask = null;
+        }
+
         //Reload data
         changeCurrentDir(this.mCurrentDir, false, true, false, null, scrollTo);
     }
@@ -1026,9 +1025,11 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
             final String newDir, final boolean addToHistory,
             final boolean reload, final boolean useCurrent,
             final SearchInfoParcelable searchInfo, final FileSystemObject scrollTo) {
+        this.mPreviousDir = this.mCurrentDir;
+        this.mCurrentDir = newDir;
         mNavigationTask = new NavigationTask(useCurrent, addToHistory, reload,
                 searchInfo, scrollTo, mRestrictions, mChRooted);
-        mNavigationTask.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR, newDir);
+        mNavigationTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, newDir);
     }
 
     /**
@@ -1072,6 +1073,7 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
         try {
             //Check that there is not errors and have some data
             if (files == null) {
+                this.mCurrentDir = this.mPreviousDir;
                 return;
             }
 
@@ -1106,19 +1108,20 @@ BreadcrumbListener, OnSelectionChangedListener, OnSelectionListener, OnRequestRe
             scrollTo(scrollTo);
 
             //The current directory is now the "newDir"
-            this.mCurrentDir = newDir;
             if (this.mOnDirectoryChangedListener != null) {
                 FileSystemObject dir = FileHelper.createFileSystemObject(new File(newDir));
                 this.mOnDirectoryChangedListener.onDirectoryChanged(dir);
             }
 
-            mNavigationTask = null;
         } finally {
             //If calling activity is search, then save the search history
             if (searchInfo != null) {
                 this.mOnHistoryListener.onNewHistory(searchInfo);
             }
 
+            this.mPreviousDir = null;
+            mNavigationTask = null;
+
             //End of loading data
             try {
                 NavigationView.this.mBreadcrumb.endLoading();