Word wrapping sequence diagram endpoint names

Fixes #469

Author: John Simons

src/ServiceInsight/App.xaml

@@ -29,6 +29,8 @@
                     <cnv:PopupMenuItemCountVisibleConverter x:Key="PopupMenuItemCountVisibleConverter" />
                     <cnv:CompositeCollectionConverter x:Key="CompositeCollectionConverter" />
                     <cnv:TimeSpanHumanizedConverter x:Key="TimeSpanHumanizedConverter" />
+                    <cnv:SmartWrapConverter x:Key="SmartWrapConverter" />
+                    <cnv:CenterToolTipConverter x:Key="CenterToolTipConverter" />
 
                     <!-- Colors and Brushes -->
                     <SolidColorBrush x:Key="ControlBackgroundColor" Color="#FFCED4DF" />

src/ServiceInsight/SequenceDiagram/EndpointInfo.cs

@@ -3,7 +3,6 @@
 namespace Particular.ServiceInsight.Desktop.SequenceDiagram
 {
     using System.Diagnostics;
-    using System.Linq;
     using Models;
 
     [DebuggerDisplay("{Name}")]
@@ -16,16 +15,13 @@ protected EndpointInfo()
         public EndpointInfo(Endpoint endpoint, string version)
         {
             if (endpoint == null)
-                throw new ArgumentNullException("endpoint", "endpoint is null.");
-            
-            Name = string.Join(".", endpoint.Name.Split('.').Skip(1));
-            if (string.IsNullOrEmpty(Name))
             {
-                Name = endpoint.Name;
+                throw new ArgumentNullException("endpoint", "endpoint is null.");
             }
-            FullName = endpoint.Name;
+            
+            FullName = Name = endpoint.Name;
             Version = version;
-            Host = endpoint.Host ?? "";
+            Host = endpoint.Host ?? String.Empty;
         }
 
         public string Name { get; protected set; }

src/ServiceInsight/SequenceDiagram/SequenceDiagramView.xaml

@@ -20,8 +20,15 @@
                 <ResourceDictionary>
                     <Style x:Key="EndpointTooltipStyle" TargetType="ToolTip">
                         <Setter Property="OverridesDefaultStyle" Value="true" />
-                        <Setter Property="Placement" Value="Center" />
-                        <Setter Property="VerticalOffset" Value="54" />
+                        <Setter Property="Placement" Value="Bottom" />
+                        <Setter Property="HorizontalOffset">
+                            <Setter.Value>
+                                <MultiBinding Converter="{StaticResource CenterToolTipConverter}">
+                                    <Binding RelativeSource="{RelativeSource Self}" Path="PlacementTarget.ActualWidth"/>
+                                    <Binding RelativeSource="{RelativeSource Self}" Path="ActualWidth"/>
+                                </MultiBinding>
+                            </Setter.Value>
+                        </Setter>
                         <Setter Property="Template">
                             <Setter.Value>
                                 <ControlTemplate TargetType="ToolTip">
@@ -136,7 +143,8 @@
                                     <TextBlock Grid.Column="1"
                                            HorizontalAlignment="Center"
                                            VerticalAlignment="Center"
-                                           Text="{Binding Name}" 
+                                           Text="{Binding Name, Converter={StaticResource SmartWrapConverter}}"
+                                           TextWrapping="Wrap"
                                            TextTrimming="CharacterEllipsis" />
                                 </Grid>
                             </Border>

src/ServiceInsight/ServiceInsight.csproj

@@ -503,11 +503,13 @@
     <Compile Include="ValueConverters\BoolToBrushConverter.cs" />
     <Compile Include="ValueConverters\ByteToCharConverter.cs" />
     <Compile Include="ValueConverters\ByteToHexConverter.cs" />
+    <Compile Include="ValueConverters\CenterToolTipConverter.cs" />
     <Compile Include="ValueConverters\CompositeCollectionConverter.cs" />
     <Compile Include="ValueConverters\EndSegmentValueConverter.cs" />
     <Compile Include="ValueConverters\MessageDateTimeFormatProvider.cs" />
     <Compile Include="ValueConverters\MiddlePointValueConverter.cs" />
     <Compile Include="ValueConverters\PopupMenuItemCountVisibleConverter.cs" />
+    <Compile Include="ValueConverters\SmartWrapConverter.cs" />
     <Compile Include="ValueConverters\StartSegmentValueConverter.cs" />
     <Compile Include="ValueConverters\StatusToBrushConverter.cs" />
     <Compile Include="ValueConverters\StringEmptyOrNullToVisibilityConverter.cs" />

src/ServiceInsight/ValueConverters/CenterToolTipConverter.cs

@@ -0,0 +1,27 @@
+namespace Particular.ServiceInsight.Desktop.ValueConverters
+{
+    using System;
+    using System.Globalization;
+    using System.Linq;
+    using System.Windows;
+    using System.Windows.Data;
+
+    public class CenterToolTipConverter : IMultiValueConverter
+    {
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (values.FirstOrDefault(v => v == DependencyProperty.UnsetValue) != null)
+            {
+                return double.NaN;
+            }
+            double placementTargetWidth = (double)values[0];
+            double toolTipWidth = (double)values[1];
+            return (placementTargetWidth / 2.0) - (toolTipWidth / 2.0);
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            throw new NotSupportedException();
+        }
+    }
+}

src/ServiceInsight/ValueConverters/SmartWrapConverter.cs

@@ -0,0 +1,47 @@
+namespace Particular.ServiceInsight.Desktop.ValueConverters
+{
+    using System;
+    using System.Text.RegularExpressions;
+    using System.Windows;
+    using System.Windows.Data;
+
+    public class SmartWrapConverter : IValueConverter
+    {
+        private static readonly Regex PascalCaseWordPartsRegex;
+
+        static SmartWrapConverter()
+        {
+            PascalCaseWordPartsRegex = new Regex(@"[A-Z]?[a-z]+|[0-9]+|[A-Z]+(?=[A-Z][a-z]|[0-9]|\b)",
+                RegexOptions.IgnorePatternWhitespace | RegexOptions.ExplicitCapture | RegexOptions.Compiled);
+        }
+
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            var result = value as string;
+
+            if (result == null)
+            {
+                return DependencyProperty.UnsetValue;
+            }
+
+            result = result.Replace(".", ".\u200B");
+            result = result.Replace("-", "-\u200B");
+            result = result.Replace("_", "_\u200B");
+
+            return AddUnicodeZeroWidthSpaceBasedOnPascalCase(result);
+        }
+
+        static string AddUnicodeZeroWidthSpaceBasedOnPascalCase(string input)
+        {
+            var result = PascalCaseWordPartsRegex
+                .Replace(input, match => "\u200B" + match.Value);
+
+            return result;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}