refactoring: interface IAppTask -> abstract class AppTask (allows to implement empty default behaviour in base class, removal of static helper class)

preparations for new task (select entry then close)

src/keepass2android/EntryActivity.cs

@@ -50,7 +50,7 @@ namespace keepass2android
 		public const String KEY_CLOSE_AFTER_CREATE = "close_after_create";
 
 
-		public static void Launch(Activity act, PwEntry pw, int pos, IAppTask appTask) {
+		public static void Launch(Activity act, PwEntry pw, int pos, AppTask appTask) {
 			Intent i;
 			
 			i = new Intent(act, typeof(EntryActivity));
@@ -69,7 +69,7 @@ namespace keepass2android
 		private bool mShowPassword;
 		private int mPos;
 
-		IAppTask mAppTask;
+		AppTask mAppTask;
 		
 
 		protected void setEntryView() {

src/keepass2android/EntryEditActivity.cs

@@ -73,6 +73,8 @@ namespace keepass2android
 		private ScrollView scroll;
 
 		bool mCloseForReload;
+
+		AppTask mAppTask;
 		
 		protected override void OnCreate(Bundle savedInstanceState)
 		{
@@ -86,6 +88,8 @@ namespace keepass2android
 				return;
 			}
 
+			mAppTask = AppTask.GetTaskInOnCreate(savedInstanceState, Intent);
+
 			SetContentView(Resource.Layout.entry_edit);
 			mCloseForReload = false;
 
@@ -234,9 +238,7 @@ namespace keepass2android
 			}
 			save.Click += (object sender, EventArgs e) => 
 			{
-				OnFinish onFinish = new AfterSave(new Handler(), this);
-
-				SaveEntry(onFinish);
+				SaveEntry();
 
 			};
 		
@@ -284,7 +286,7 @@ namespace keepass2android
 
 		}
 
-		void SaveEntry(OnFinish onFinish)
+		void SaveEntry()
 		{
 			Database db = App.getDB();
 			EntryEditActivity act = this;
@@ -358,9 +360,7 @@ namespace keepass2android
 			if(bUndoBackup) newEntry.History.RemoveAt(newEntry.History.UCount - 1);
 			
 			newEntry.MaintainBackups(db.pm);
-			
-			
-			
+
 			//if ( newEntry.Strings.ReadSafe (PwDefs.TitleField).Equals(State.mEntry.Strings.ReadSafe (PwDefs.TitleField)) ) {
 			//	SetResult(KeePass.EXIT_REFRESH);
 			//} else {
@@ -368,15 +368,30 @@ namespace keepass2android
 			SetResult(KeePass.EXIT_REFRESH_TITLE);
 			//}
 			
-			RunnableOnFinish task;
-			
-			
+			RunnableOnFinish runnable;
+
+			ActionOnFinish closeOrShowError = new ActionOnFinish((success, message) => {
+				if (success)
+				{
+					Finish();
+				} else
+				{
+					OnFinish.displayMessage(this, message);
+				}
+			});
+
+			ActionOnFinish afterAddEntry = new ActionOnFinish((success, message) => 
+			{
+				if (success)
+					mAppTask.AfterAddNewEntry(this);
+			},closeOrShowError);
+
 			if ( State.mIsNew ) {
-				task = AddEntry.getInstance(this, App.getDB(), newEntry, State.parentGroup, onFinish);
+				runnable = AddEntry.getInstance(this, App.getDB(), newEntry, State.parentGroup, afterAddEntry);
 			} else {
-				task = new UpdateEntry(this, App.getDB(), initialEntry, newEntry, onFinish);
+				runnable = new UpdateEntry(this, App.getDB(), initialEntry, newEntry, closeOrShowError);
 			}
-			ProgressTask pt = new ProgressTask(act, task, Resource.String.saving_database);
+			ProgressTask pt = new ProgressTask(act, runnable, Resource.String.saving_database);
 			pt.run();
 			
 
@@ -535,6 +550,12 @@ namespace keepass2android
 			populateBinaries();
 		}
 
+		protected override void OnSaveInstanceState(Bundle outState)
+		{
+			base.OnSaveInstanceState(outState);
+			mAppTask.ToBundle(outState);
+		}
+
 		public override void OnBackPressed()
 		{
 			if (State.mEntryModified == false)
@@ -901,22 +922,6 @@ namespace keepass2android
 
 		}
 
-		private class AfterSave : OnFinish {
-			Activity act;
-			public AfterSave(Handler handler, Activity act): base(handler) {
-				this.act = act;
-			}
-			
-
-			public override void run() {
-				if ( mSuccess ) {
-					act.Finish();
-				} else {
-					displayMessage(act);
-				}
-			}
-			
-		}
 		
 	}
 

src/keepass2android/GroupActivity.cs

@@ -45,11 +45,11 @@ namespace keepass2android
 		
 		private const String TAG = "Group Activity:";
 		
-		public static void Launch(Activity act, IAppTask appTask) {
+		public static void Launch(Activity act, AppTask appTask) {
 			Launch(act, null, appTask);
 		}
 		
-		public static void Launch (Activity act, PwGroup g, IAppTask appTask)
+		public static void Launch (Activity act, PwGroup g, AppTask appTask)
 		{
 			Intent i;
 			

src/keepass2android/GroupBaseActivity.cs

@@ -63,7 +63,7 @@ namespace keepass2android
 		
 		protected PwGroup mGroup;
 
-		internal IAppTask mAppTask;
+		internal AppTask mAppTask;
 		
 		protected override void OnResume() {
 			base.OnResume();

src/keepass2android/PasswordActivity.cs

@@ -87,7 +87,7 @@ namespace keepass2android
 			ioc.CredSaveMode  = (IOCredSaveMode)i.GetIntExtra(KEY_SERVERCREDMODE, (int) IOCredSaveMode.NoSave);
 		}
 
-		public static void Launch(Activity act, String fileName, IAppTask appTask)  {
+		public static void Launch(Activity act, String fileName, AppTask appTask)  {
 			Java.IO.File dbFile = new Java.IO.File(fileName);
 			if ( ! dbFile.Exists() ) {
 				throw new Java.IO.FileNotFoundException();
@@ -108,7 +108,7 @@ namespace keepass2android
 		}
 
 
-		public static void Launch(Activity act, IOConnectionInfo ioc, IAppTask appTask)
+		public static void Launch(Activity act, IOConnectionInfo ioc, AppTask appTask)
 		{
 			if (ioc.IsLocalFile())
 			{
@@ -279,7 +279,7 @@ namespace keepass2android
 			
 		}
 
-		internal IAppTask mAppTask;
+		internal AppTask mAppTask;
 		
 		protected override void OnCreate(Bundle savedInstanceState)
 		{

src/keepass2android/app/AppTask.cs

@@ -62,131 +62,48 @@ namespace keepass2android
 	}
 
 	/// <summary>
-	/// interface for "tasks": this are things the user wants to do and which require several activities
+	/// base class for "tasks": this are things the user wants to do and which require several activities
 	/// </summary>
-	public interface IAppTask
+	public abstract class AppTask
 	{
 		/// <summary>
 		/// Loads the parameters of the task from the given bundle
 		/// </summary>
-		void Setup(Bundle b);
+		public virtual void Setup(Bundle b)
+		{}
 
 		/// <summary>
 		/// Returns the parameters of the task for storage in a bundle or intent
 		/// </summary>
 		/// <value>The extras.</value>
-		IEnumerable<IExtra> Extras { get;}
-
-		void AfterUnlockDatabase(PasswordActivity act);
-
-		bool CloseEntryActivityAfterCreate
-		{
-			get;
-		}
-	}
-
-	/// <summary>
-	/// Implementation of IAppTask for "no task currently active" (Null pattern)
-	/// </summary>
-	public class NullTask: IAppTask
-	{
-		
-		public void Setup(Bundle b)
-		{
-		}
-
-		public IEnumerable<IExtra> Extras 
-		{ 
+		public virtual IEnumerable<IExtra> Extras { 
 			get
 			{
 				yield break;
 			}
 		}
 
-		
-		public void AfterUnlockDatabase(PasswordActivity act)
+		public virtual void AfterUnlockDatabase(PasswordActivity act)
 		{
 			GroupActivity.Launch(act, this);
 		}
-		public bool CloseEntryActivityAfterCreate
+
+		public virtual void AfterAddNewEntry(EntryEditActivity entryEditActivity)
+		{
+		}
+
+		public virtual bool CloseEntryActivityAfterCreate
 		{
 			get { return false;}
 		}
-	}
 
-	/// <summary>
-	/// User is about to search an entry for a given URL
-	/// </summary>
-	public class SearchUrlTask: IAppTask
-	{
-		public const String UrlToSearch_key = "UrlToSearch";
-
-		public string UrlToSearchFor
-		{
-			get;
-			set;
-		}
-
-		public void Setup(Bundle b)
-		{
-			UrlToSearchFor = b.GetString(UrlToSearch_key);
-		}
-		public IEnumerable<IExtra> Extras 
-		{ 
-			get
-			{
-				yield return new StringExtra() { Key=UrlToSearch_key, Value = UrlToSearchFor };
-			}
-		}
-		public void AfterUnlockDatabase(PasswordActivity act)
-		{
-			ShareUrlResults.Launch(act, this);
-		}
-		public bool CloseEntryActivityAfterCreate
-		{
-			get { return true;}
-		}
-	}
-
-	
-	/// <summary>
-	/// User is about to select an entry for use in another app
-	/// </summary>
-	public class SelectEntryTask: IAppTask
-	{
-		public void Setup(Bundle b)
-		{
-		}
-		public IEnumerable<IExtra> Extras 
-		{ 
-			get
-			{
-				yield break;
-			}
-		}
-		public void AfterUnlockDatabase(PasswordActivity act)
-		{
-			GroupActivity.Launch(act, this);
-		}
-		public bool CloseEntryActivityAfterCreate
-		{
-			//keypoint here: close the app after selecting the entry
-			get { return true;}
-		}
-	}
-
-	/// <summary>
-	/// 
-	/// </summary>
-	public static class AppTask
-	{
 		public const String AppTask_key = "KP2A_APPTASK";
 
 		/// <summary>
 		/// Should be used in OnCreate to (re)create a task
 		/// if savedInstanceState is not null, the task is recreated from there. Otherwise it's taken from the intent.
 		/// </summary>
-		public static IAppTask GetTaskInOnCreate(Bundle savedInstanceState, Intent intent)
+		public static AppTask GetTaskInOnCreate(Bundle savedInstanceState, Intent intent)
 		{
 			if (savedInstanceState != null)
 			{
@@ -198,12 +115,12 @@ namespace keepass2android
 			}
 		}
 
-		public static IAppTask CreateFromIntent(Intent i)
+		public static AppTask CreateFromIntent(Intent i)
 		{
 			return CreateFromBundle(i.Extras);
 		}
 
-		public static IAppTask CreateFromBundle(Bundle b)
+		public static AppTask CreateFromBundle(Bundle b)
 		{
 			if (b == null)
 				return new NullTask();
@@ -219,7 +136,7 @@ namespace keepass2android
 			{
 				if (taskType == type.Name)
 				{
-					IAppTask task = (IAppTask)Activator.CreateInstance(type);
+					AppTask task = (AppTask)Activator.CreateInstance(type);
 					task.Setup(b);
 					return task;
 				}
@@ -231,11 +148,11 @@ namespace keepass2android
 		/// <summary>
 		/// Adds the extras of the task to the intent
 		/// </summary>
-		public static void ToIntent(this IAppTask task, Intent intent)
+		public void ToIntent(Intent intent)
 		{
-			AppTask.GetTypeExtra(task.GetType()).ToIntent(intent);
+			AppTask.GetTypeExtra(GetType()).ToIntent(intent);
 
-			foreach (IExtra extra in task.Extras)
+			foreach (IExtra extra in Extras)
 			{
 				extra.ToIntent(intent);
 			}
@@ -244,11 +161,11 @@ namespace keepass2android
 		/// <summary>
 		/// Adds the extras of the task to the bundle
 		/// </summary>
-		public static void ToBundle(this IAppTask task, Bundle bundle)
+		public void ToBundle(Bundle bundle)
 		{
-			AppTask.GetTypeExtra(task.GetType()).ToBundle(bundle);
+			AppTask.GetTypeExtra(GetType()).ToBundle(bundle);
 
-			foreach (IExtra extra in task.Extras)
+			foreach (IExtra extra in Extras)
 			{
 				extra.ToBundle(bundle);
 			}
@@ -264,5 +181,94 @@ namespace keepass2android
 		}
 
 	}
+
+	/// <summary>
+	/// Implementation of AppTask for "no task currently active" (Null pattern)
+	/// </summary>
+	public class NullTask: AppTask
+	{
+
+	}
+
+	/// <summary>
+	/// User is about to search an entry for a given URL
+	/// </summary>
+	public class SearchUrlTask: AppTask
+	{
+		public const String UrlToSearch_key = "UrlToSearch";
+
+		public string UrlToSearchFor
+		{
+			get;
+			set;
+		}
+
+		public override void Setup(Bundle b)
+		{
+			UrlToSearchFor = b.GetString(UrlToSearch_key);
+		}
+		public override IEnumerable<IExtra> Extras 
+		{ 
+			get
+			{
+				yield return new StringExtra() { Key=UrlToSearch_key, Value = UrlToSearchFor };
+			}
+		}
+		public override void AfterUnlockDatabase(PasswordActivity act)
+		{
+			ShareUrlResults.Launch(act, this);
+		}
+		public override bool CloseEntryActivityAfterCreate
+		{
+			get { return true;}
+		}
+	}
+
+	
+	/// <summary>
+	/// User is about to select an entry for use in another app
+	/// </summary>
+	public class SelectEntryTask: AppTask
+	{
+
+		public override bool CloseEntryActivityAfterCreate
+		{
+			//keypoint here: close the app after selecting the entry
+			get { return true;}
+		}
+	}
+
+	
+	/// <summary>
+	/// User is about to create a new entry. The task might already "know" some information about the contents.
+	/// </summary>
+	public class CreateEntryThenCloseTask: AppTask
+	{
+		public const String Url_key = "CreateEntry_Url";
+
+		public string Url
+		{
+			get;
+			set;
+		}
+
+		public override void Setup(Bundle b)
+		{
+			Url = b.GetString(Url_key);
+		}
+		public override IEnumerable<IExtra> Extras 
+		{ 
+			get
+			{
+				yield return new StringExtra() { Key = Url_key, Value = Url };
+				yield break;
+			}
+		}
+		public override bool CloseEntryActivityAfterCreate
+		{
+			//if the user selects an entry before creating the new one, we're not closing the app
+			get { return false;}
+		}
+	}
 }
 

src/keepass2android/database/edit/OnFinish.cs

@@ -78,11 +78,15 @@ namespace keepass2android
 		}
 		
 		protected void displayMessage(Context ctx) {
-			if ( mMessage != null && mMessage.Length > 0 ) {
-				Toast.MakeText(ctx, mMessage, ToastLength.Long).Show();
-			}
+			displayMessage(ctx, mMessage);
 		}
 
+		public static void displayMessage(Context ctx, string message)
+		{
+			if ( !String.IsNullOrEmpty(message) ) {
+				Toast.MakeText(ctx, message, ToastLength.Long).Show();
+			}
+		}
 	}
 }
 

src/keepass2android/fileselect/FileSelectActivity.cs

@@ -64,7 +64,7 @@ namespace keepass2android
 		view.FileSelectButtons fileSelectButtons;
 		bool createdWithActivityResult = false;
 
-		internal IAppTask mAppTask;
+		internal AppTask mAppTask;
 
 		IOConnectionInfo loadIoc(string defaultFileName)
 		{