Allow ability to enable/disable blocks with groups

https://github.com/ben-wallis/Filtration/issues/40

For any given block that uses block groups, those blocks will be
enabled/disabled rather than toggled between show/hide if the following
syntax is used:

[show|hide] #! [group_spec]

Notice the additional "!" immediately after the "#" and before the first
group name.

It is possible to have some blocks which toggle Enable/Disable and some
which toggle Show/Hide for a given group.

Filtration.ObjectModel/ItemFilterBlock.cs

@@ -1,17 +1,23 @@
 using System;
+using System.ComponentModel;
 using System.Collections.ObjectModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Windows.Media;
+using Filtration.ObjectModel.Annotations;
 using Filtration.ObjectModel.BlockItemBaseTypes;
 using Filtration.ObjectModel.BlockItemTypes;
 using Filtration.ObjectModel.Enums;
 using Filtration.ObjectModel.Extensions;
 
+
 namespace Filtration.ObjectModel
 {
     public interface IItemFilterBlock
     {
         bool Enabled { get; set; }
+        // Rather than toggling between Hide/Show when a group is toggled, Disable/Enable
+        bool DisableWithGroup { get; set; }
         string Description { get; set; }
         ItemFilterBlockGroup BlockGroup { get; set; }
         BlockAction Action { get; set; }
@@ -26,18 +32,43 @@ namespace Filtration.ObjectModel
         bool HasBlockGroupInParentHierarchy(ItemFilterBlockGroup targetBlockGroup, ItemFilterBlockGroup startingBlockGroup);
     }
 
-    public class ItemFilterBlock : IItemFilterBlock
+    public class ItemFilterBlock : IItemFilterBlock, INotifyPropertyChanged
     {
+        protected bool _Enabled;
+
         private ItemFilterBlockGroup _blockGroup;
 
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        [NotifyPropertyChangedInvocator]
+        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            var handler = PropertyChanged;
+            handler?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+
         public ItemFilterBlock()
         {
             BlockItems = new ObservableCollection<IItemFilterBlockItem> {new ActionBlockItem(BlockAction.Show)};
-            Enabled = true;
+            DisableWithGroup = false;
+            _Enabled = true;
+        }
+
+        public bool Enabled
+        {
+            get { return _Enabled; }
+            set
+            {
+                if (_Enabled != value)
+                {
+                    _Enabled = value;
+                    OnPropertyChanged(nameof(Enabled));
+                }
+            }
         }
             
-        public bool Enabled { get; set; }
         public string Description { get; set; }
+        public bool DisableWithGroup { get; set; }
 
         public ItemFilterBlockGroup BlockGroup
         {
@@ -112,6 +143,20 @@ namespace Filtration.ObjectModel
         }
         
         private void OnBlockGroupStatusChanged(object sender, EventArgs e)
+        {
+            if (DisableWithGroup)
+            {
+                if (BlockGroup.IsChecked != Enabled)
+                {
+                    Enabled = BlockGroup.IsChecked;
+                    // DFRICE
+                    Console.WriteLine("TOGGLE! ENABLED=" + (Enabled ? "YES" : "NO"));
+                    // This is a bit hacky. Enabled/Disabled isn't part of BlockItems,
+                    // but we want to piggy back on the Observerable aspect of it.
+                    // Just generate a change event for the Action (Show/Hide) block.
+                }
+            }
+            else
             {
                 if (BlockGroup.IsChecked == false && Action == BlockAction.Show)
                 {
@@ -122,6 +167,7 @@ namespace Filtration.ObjectModel
                     Action = BlockAction.Show;
                 }
             }
+        }
 
         public Color DisplayTextColor
         {

Filtration.Parser/Services/ItemFilterBlockTranslator.cs

@@ -394,14 +394,29 @@ namespace Filtration.Parser.Services
             var blockGroupStart = inputString.IndexOf("#", StringComparison.Ordinal);
             if (blockGroupStart <= 0) return;
 
-            var blockGroupText = inputString.Substring(blockGroupStart + 1);
+            var blockGroupText = inputString.Substring(blockGroupStart + 1).TrimStart();
+
+            if (blockGroupText.StartsWith("!"))
+            {
+                block.DisableWithGroup = true;
+                blockGroupText = blockGroupText.Substring(1);
+                //block.Description = block.Description + "--DR--";
+            }
+
             var blockGroups = blockGroupText.Split('-').ToList();
             if (blockGroups.Count(b => !string.IsNullOrEmpty(b.Trim())) > 0)
             {
                 block.BlockGroup = _blockGroupHierarchyBuilder.IntegrateStringListIntoBlockGroupHierarchy(blockGroups);
+                if (block.DisableWithGroup)
+                {
+                    block.BlockGroup.IsChecked = block.Enabled;
+                }
+                else
+                {
                     block.BlockGroup.IsChecked = block.Action == BlockAction.Show;
                 }
             }
+        }
 
         private static Color GetColorFromString(string inputString)
         {
@@ -454,7 +469,7 @@ namespace Filtration.Parser.Services
 
             if (block.BlockGroup != null)
             {
-                outputString += " # " + block.BlockGroup;
+                outputString += (block.DisableWithGroup ? " #! " : " # ") + block.BlockGroup;
             }
 
             // ReSharper disable once LoopCanBeConvertedToQuery

Filtration/ViewModels/ItemFilterBlockViewModel.cs

@@ -82,6 +82,12 @@ namespace Filtration.ViewModels
             {
                 blockItem.PropertyChanged += OnBlockItemChanged;
             }
+
+            // ItemFilterBlocks have innate properties themselves to listen to (such as enabled/disabled)
+            if (itemFilterBlock is ItemFilterBlock)
+            {
+                ((ItemFilterBlock)itemFilterBlock).PropertyChanged += OnBlockChanged;
+            }
         }
 
         public RelayCommand CopyBlockCommand { get; private set; }
@@ -204,15 +210,7 @@ namespace Filtration.ViewModels
         public bool BlockEnabled
         {
             get { return Block.Enabled; }
-            set
+            set { Block.Enabled = value;}
-            {
-                if (Block.Enabled != value)
-                {
-                    Block.Enabled = value;
-                    IsDirty = true;
-                    RaisePropertyChanged();
-                }
-            }
         }
 
         public string BlockDescription
@@ -368,6 +366,13 @@ namespace Filtration.ViewModels
             //}
         }
 
+        private void OnBlockChanged(object sender, EventArgs e)
+        {
+            IsDirty = true;
+            RaisePropertyChanged(nameof(BlockEnabled));
+            Console.WriteLine("OnBlockChanged");
+        }
+
         public void RefreshBlockPreview()
         {
             RaisePropertyChanged(nameof(DisplayTextColor));