Fixes #1475. Selection ending with a white space error. (#1478)

* Fixes #1475. Selection ending with a white space error.

* Prevents the mouse  double click processing twice.

* Removing unnecessary variable.

* Sets ScrollViewBar CanFocus to false to ensure the host always focused.

* Only navigates through TabView if winDialog is not null and ensures TextView being focused.

* Fixes both dynamic menu and status bar broken scenarios.

* Fix a bug where the subviews oldEnabled can be overridden, even the superview Enable property hasn't changed.

* Fixes CanFocus when set to false and HasFocus is true.

* Fixes the broken TextView DesiredCursorVisibility.

* Prevents TextField being focused by mouse if CanFocus is false.

* Fixes the CanFocus on content views.

* Fixes #1470. Not all WindowsConsole.InputRecord are caught in WindowsDriver.

* Changing the input for a Queue object.

* Suppress warnings.

* Fixed yet the visibility cursor and adding more unit tests.

* Suppressing more warnings.

UnitTests/TextFieldTests.cs

@@ -457,6 +457,12 @@ namespace Terminal.Gui.Views {
 					Assert.Null (_textField.SelectedText);
 					break;
 				case 9:
+					Assert.Equal (54, _textField.CursorPosition);
+					Assert.Equal (-1, _textField.SelectedStart);
+					Assert.Equal (0, _textField.SelectedLength);
+					Assert.Null (_textField.SelectedText);
+					break;
+				case 10:
 					Assert.Equal (55, _textField.CursorPosition);
 					Assert.Equal (-1, _textField.SelectedStart);
 					Assert.Equal (0, _textField.SelectedLength);
@@ -785,5 +791,100 @@ namespace Terminal.Gui.Views {
 			_textField.Paste ();
 			Assert.Equal ("TAB to jump between text fields.", _textField.Text);
 		}
+
+		[Fact]
+		[InitShutdown]
+		public void TextField_SpaceHandling ()
+		{
+			var tf = new TextField () {
+				Width = 10,
+				Text = " "
+			};
+
+			MouseEvent ev = new MouseEvent () {
+				X = 0,
+				Y = 0,
+				Flags = MouseFlags.Button1DoubleClicked,
+			};
+
+			tf.MouseEvent (ev);
+			Assert.Equal (1, tf.SelectedLength);
+
+			ev = new MouseEvent () {
+				X = 1,
+				Y = 0,
+				Flags = MouseFlags.Button1DoubleClicked,
+			};
+
+			tf.MouseEvent (ev);
+			Assert.Equal (1, tf.SelectedLength);
+		}
+
+		[Fact]
+		[InitShutdown]
+		public void CanFocus_False_Wont_Focus_With_Mouse ()
+		{
+			var top = Application.Top;
+			var tf = new TextField () {
+				Width = Dim.Fill (),
+				CanFocus = false,
+				ReadOnly = true,
+				Text = "some text"
+			};
+			var fv = new FrameView ("I shouldn't get focus") {
+				Width = Dim.Fill (),
+				Height = Dim.Fill (),
+				CanFocus = false,
+			};
+			fv.Add (tf);
+			top.Add (fv);
+
+			Application.Begin (top);
+
+			Assert.False (tf.CanFocus);
+			Assert.False (tf.HasFocus);
+			Assert.False (fv.CanFocus);
+			Assert.False (fv.HasFocus);
+
+			tf.MouseEvent (new MouseEvent () {
+				X = 1,
+				Y = 0,
+				Flags = MouseFlags.Button1DoubleClicked
+			});
+
+			Assert.Null (tf.SelectedText);
+			Assert.False (tf.CanFocus);
+			Assert.False (tf.HasFocus);
+			Assert.False (fv.CanFocus);
+			Assert.False (fv.HasFocus);
+
+			Assert.Throws<InvalidOperationException> (() => tf.CanFocus = true);
+			fv.CanFocus = true;
+			tf.CanFocus = true;
+			tf.MouseEvent (new MouseEvent () {
+				X = 1,
+				Y = 0,
+				Flags = MouseFlags.Button1DoubleClicked
+			});
+
+			Assert.Equal ("some ", tf.SelectedText);
+			Assert.True (tf.CanFocus);
+			Assert.True (tf.HasFocus);
+			Assert.True (fv.CanFocus);
+			Assert.True (fv.HasFocus);
+
+			fv.CanFocus = false;
+			tf.MouseEvent (new MouseEvent () {
+				X = 1,
+				Y = 0,
+				Flags = MouseFlags.Button1DoubleClicked
+			});
+
+			Assert.Equal ("some ", tf.SelectedText); // Setting CanFocus to false don't change the SelectedText
+			Assert.False (tf.CanFocus);
+			Assert.False (tf.HasFocus);
+			Assert.False (fv.CanFocus);
+			Assert.False (fv.HasFocus);
+		}
 	}
 }