From 736fea966b6a92e80abefd059484df2eb24de982 Mon Sep 17 00:00:00 2001
From: Chris Anders <filmee24@gmail.com>
Date: Fri, 11 Oct 2024 06:53:28 +0000
Subject: [PATCH] feat: Add SyntaxHighlighting

---
 .../Controls/ProgramEditorControl.axaml       |  2 +-
 .../Controls/ProgramEditorControl.axaml.cs    | 19 ++++++++-
 .../MimaSim/Resources/CustomHighligting.xshd  | 40 +++++++++++++++++++
 3 files changed, 59 insertions(+), 2 deletions(-)
 create mode 100644 src/MimaSim/MimaSim/Resources/CustomHighligting.xshd

diff --git a/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml b/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml
index afda654e..d33f874e 100644
--- a/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml
+++ b/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml
@@ -12,7 +12,7 @@
   <Grid ColumnDefinitions="AUTO,*,AUTO" RowDefinitions="35,*,35">
     <c:ExecutionBar Grid.Column="0" Grid.Row="0" Margin="5,3,0,0" />
 
-    <avaloniaEdit:TextEditor MinWidth="150" MaxHeight="450" MinHeight="150" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="3"
+    <avaloniaEdit:TextEditor x:Name="editor" MinWidth="150" MaxHeight="450" MinHeight="150" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="3"
                              FontFamily="Cascadia Code,Consolas,Menlo,Monospace" Margin="0,5,0,5"
                              ShowLineNumbers="True">
         <i:Interaction.Behaviors>
diff --git a/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml.cs b/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml.cs
index fac5a5f9..17fb861e 100644
--- a/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml.cs
+++ b/src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml.cs
@@ -1,6 +1,10 @@
-using Avalonia.Controls;
+using System.IO;
+using System.Xml;
+using Avalonia.Controls;
 using Avalonia.Markup.Xaml;
 using Avalonia.ReactiveUI;
+using AvaloniaEdit.Highlighting;
+using AvaloniaEdit.Highlighting.Xshd;
 using MimaSim.ViewModels;
 using ReactiveUI;
 
@@ -18,5 +22,18 @@ public ProgramEditorControl()
     private void InitializeComponent()
     {
         AvaloniaXamlLoader.Load(this);
+
+        IHighlightingDefinition customHighlighting;
+        using (Stream s = GetType().Assembly.GetManifestResourceStream("MimaSim.Resources.CustomHighlighting.xshd"))
+        {
+            using (XmlReader reader = new XmlTextReader(s))
+            {
+                customHighlighting = HighlightingLoader.Load(reader, HighlightingManager.Instance);
+            }
+        }
+
+        HighlightingManager.Instance.RegisterHighlighting("Custom Highlighting", new string[] { ".cool" }, customHighlighting);
+
+        editor.SyntaxHighlighting = HighlightingManager.Instance.GetDefinitionByExtension(".cool");
     }
 }
\ No newline at end of file
diff --git a/src/MimaSim/MimaSim/Resources/CustomHighligting.xshd b/src/MimaSim/MimaSim/Resources/CustomHighligting.xshd
new file mode 100644
index 00000000..73fdb6b5
--- /dev/null
+++ b/src/MimaSim/MimaSim/Resources/CustomHighligting.xshd
@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+<SyntaxDefinition name="Custom Highlighting" xmlns="http://icsharpcode.net/sharpdevelop/syntaxdefinition/2008">
+	<Color name="Comment" foreground="Green" />
+	<Color name="String" foreground="Blue" />
+	
+	<!-- This is the main ruleset. -->
+	<RuleSet>
+		<Span color="Comment" begin="//" />
+		<Span color="Comment" multiline="true" begin="/\*" end="\*/" />
+		
+		<Span color="String">
+			<Begin>"</Begin>
+			<End>"</End>
+			<RuleSet>
+				<!-- nested span for escape sequences -->
+				<Span begin="\\" end="." />
+			</RuleSet>
+		</Span>
+		
+		<Keywords fontWeight="bold" foreground="Blue">
+			<Word>if</Word>
+			<Word>else</Word>
+			<Word>var</Word>
+		</Keywords>
+		
+		<Keywords fontWeight="bold" fontStyle="italic" foreground="Red">
+			<Word>AvalonEdit</Word>
+		</Keywords>
+		
+		<!-- Digits -->
+		<Rule foreground="DarkBlue">
+            \b0[xX][0-9a-fA-F]+  # hex number
+        |    \b
+            (    \d+(\.[0-9]+)?   #number with optional floating point
+            |    \.[0-9]+         #or just starting with floating point
+            )
+            ([eE][+-]?[0-9]+)? # optional exponent
+        </Rule>
+	</RuleSet>
+</SyntaxDefinition>
\ No newline at end of file