Add TLA to backstack when editing from widget

Closes #82

src/main/java/com/todoroo/astrid/widget/TasksWidget.java

@@ -11,24 +11,26 @@ import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
+import android.support.v4.app.TaskStackBuilder;
 
 import com.todoroo.andlib.utility.DateUtilities;
-import com.todoroo.astrid.activity.TaskEditActivity;
 import com.todoroo.astrid.activity.TaskEditFragment;
-import com.todoroo.astrid.activity.TaskListActivity;
+import com.todoroo.astrid.activity.TaskListFragment;
+import com.todoroo.astrid.api.Filter;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.tasks.Broadcaster;
 import org.tasks.R;
 import org.tasks.injection.InjectingAppWidgetProvider;
-import org.tasks.preferences.ActivityPreferences;
+import org.tasks.intents.TaskIntents;
 import org.tasks.widget.WidgetHelper;
 
 import javax.inject.Inject;
 
 import static com.todoroo.andlib.utility.AndroidUtilities.preIceCreamSandwich;
 import static com.todoroo.astrid.api.AstridApiConstants.BROADCAST_EVENT_REFRESH;
+import static org.tasks.intents.TaskIntents.getEditTaskStack;
 
 public class TasksWidget extends InjectingAppWidgetProvider {
 
@@ -52,15 +54,11 @@ public class TasksWidget extends InjectingAppWidgetProvider {
                 broadcaster.toggleCompletedState(intent.getLongExtra(TaskEditFragment.TOKEN_ID, 0));
                 break;
             case EDIT_TASK:
-                if (context.getResources().getBoolean(R.bool.two_pane_layout)) {
-                    intent.setClass(context, TaskListActivity.class);
-                } else {
-                    intent.setClass(context, TaskEditActivity.class);
-                }
-                intent.setFlags(WidgetHelper.flags);
-                intent.putExtra(TaskEditFragment.OVERRIDE_FINISH_ANIM, false);
-                context.startActivity(intent);
-
+                getEditTaskStack(
+                        context,
+                        (Filter) intent.getParcelableExtra(TaskListFragment.TOKEN_FILTER),
+                        intent.getLongExtra(TaskEditFragment.TOKEN_ID, 0))
+                        .startActivities();
                 break;
             case BROADCAST_EVENT_REFRESH:
                 updateWidgets(context);

src/main/java/org/tasks/intents/TaskIntents.java

@@ -63,6 +63,9 @@ public class TaskIntents {
             taskStackBuilder.addNextIntent(new Intent(context, TaskEditActivity.class) {{
                 putExtra(TaskEditFragment.TOKEN_ID, taskId);
             }});
+            if (filter != null) {
+                taskStackBuilder.editIntentAt(0).putExtra(TaskListFragment.TOKEN_FILTER, filter);
+            }
         }
         return taskStackBuilder;
     }

src/main/java/org/tasks/widget/ScrollableViewsFactory.java

@@ -14,6 +14,7 @@ import android.widget.RemoteViewsService;
 import com.todoroo.andlib.data.TodorooCursor;
 import com.todoroo.astrid.activity.TaskEditFragment;
 import com.todoroo.astrid.activity.TaskListActivity;
+import com.todoroo.astrid.activity.TaskListFragment;
 import com.todoroo.astrid.adapter.TaskAdapter;
 import com.todoroo.astrid.api.Filter;
 import com.todoroo.astrid.core.SortHelper;
@@ -165,6 +166,7 @@ public class ScrollableViewsFactory implements RemoteViewsService.RemoteViewsFac
 
             Intent editIntent = new Intent();
             editIntent.setAction(TasksWidget.EDIT_TASK);
+            editIntent.putExtra(TaskListFragment.TOKEN_FILTER, filter);
             editIntent.putExtra(TaskEditFragment.TOKEN_ID, task.getId());
             editIntent.putExtra(TaskListActivity.OPEN_TASK, task.getId());
             row.setOnClickFillInIntent(R.id.text, editIntent);