Dsm matrix view

CLAUDE.md

@@ -52,6 +52,8 @@ Five projects wired together in `CSharpCodeAnalyst.sln`:
 - **`Tests/`** (project name `CodeParserTests`) — NUnit suite. `ApprovalTests/` parses the `TestSuite/` C# solution once per fixture and asserts on the resulting graph; `UnitTests/` covers cycles, exploration, export, search, architectural rules, etc.
 - **`ApprovalTestTool/`** — standalone console app that clones external repos listed in `Repositories.txt`, parses each at a pinned commit, hashes the graph dump, and diffs against references. Used to catch parser regressions on real codebases; not part of the CI test run.
 
+`ThirdParty/DsmSuite/` holds a vendored subset (7 of ~38 projects) of the GPL-licensed DsmSuite, which provides the matrix view on the DSM tab. It is foreign code with its own rules — see **Vendored DsmSuite** below before touching anything in there.
+
 `TestSuite/` is a handcrafted C# solution used purely as parser input for the approval tests. Do not consume it from production code — it is intentionally full of odd language constructs. `ReferencedAssemblies/` contains the MSAGL DLLs referenced directly by `CSharpCodeAnalyst.csproj` and `Tests.csproj` (MSAGL is not on NuGet for the versions used here).
 
 ## Architectural notes worth knowing before editing
@@ -112,6 +114,19 @@ Then wire up the edges: `RuleEngine.Execute` for the evaluation, `RuleViolationV
 ### Refactoring simulation is destructive
 `Features/Refactoring/` mutates the in-memory `CodeGraph` directly (move / delete elements, cut edges) and there is no undo. Any code path that offers these operations should save or warn first — see existing command handlers before adding new ones.
 
+### Vendored DsmSuite (the DSM tab)
+The matrix on the DSM tab is not ours: `ThirdParty/DsmSuite/` is a modified subset of [DsmSuite](https://github.com/ernstaii/dsmsuite.sourcecode), pinned to a commit recorded in `ThirdParty/DsmSuite/README.md`, GPL-3.0-or-later (originally MIT). Our side is `Features/DsmMatrix/`: `CodeGraphToDsmModelBuilder` fills a DsmSuite `IDsmModel` straight from the `TypeGraph` — explicit `parentId`, no DSI file, no name splitting — and `DsmMatrixView` hosts their `MatrixView`.
+
+**The two documents in `ThirdParty/DsmSuite/` have different jobs — keep them apart.** `Dsm.md` is the reader's guide: what you see and how to operate it (axes — row = provider, column = consumer; the depth-coloured blocks; the row indicator bar; the presence map when zoomed out; keyboard and wheel). No class names, no rationale for our changes. `README.md` is the record against upstream: the change table, why each change was made, and the bug list. Read `Dsm.md` before changing anything about the view's semantics and keep it in sync — none of it is discoverable from the UI — but put the reasoning in `README.md`.
+
+**Every change under `ThirdParty/DsmSuite/` costs two things, and neither is optional:** (1) a `Changed <YYYY-MM> for CSharpCodeAnalyst` comment at the site explaining *why*, and (2) a row in the change table in `ThirdParty/DsmSuite/README.md`. GPL §5(a) requires stating what was modified, and that table is the map for ever diffing against upstream again — an undocumented change silently becomes indistinguishable from upstream code. Same rule for the bug list in that README when you find (or fix) a defect in their code.
+
+Two traps that are already documented there and worth knowing before you write code against their API:
+- **`DsmApplication` binds `DsmQueries` to the model it is constructed with and never rebinds.** Populate the model *first*, then construct `DsmApplication`. Calling their `LoadModel` (i.e. the file-based import path) leaves every query running against the previous model. This is why `DsmMatrixView.Show` builds everything from scratch.
+- **Their `MainViewModel` is the DataContext**, including its editing commands. Those mutate the DSM model only, never the `CodeGraph`, so they cannot corrupt a parse result — but they are live in the context menus.
+
+Their resource dictionaries are merged in `App.xaml` at application scope because their controls resolve them via `StaticResource`. Everything in there is keyed; if you pull in more of their XAML, check for implicit (unkeyed) styles first — those would restyle the whole application.
+
 ## Code style
 
 - `.editorconfig` is authoritative and ReSharper-tuned: braces required on all `if`/`foreach`/`while`, max line length 199, expression-bodied accessors preferred, `internal` first in modifier order. Analyzer severities default to `none` — do not add warning-as-error enforcement without discussion.

CSharpCodeAnalyst.CodeParser/Parser/Parser.cs

@@ -19,6 +19,13 @@ namespace CSharpCodeAnalyst.CodeParser.Parser;
 public class Parser(ParserConfig config, IProgress<string>? progress = null)
 {
 
+    /// <summary>
+    ///     A small, curated set of framework reference assemblies, resolved once from the runtime
+    ///     directory. Covers the common BCL surface (incl. LINQ) so typical snippets compile; types defined
+    ///     in the snippet itself resolve regardless. Callers needing more can extend this later.
+    /// </summary>
+    private static readonly MetadataReference[] FrameworkReferences = BuildFrameworkReferences();
+
     private readonly ParserDiagnostics _diagnostics = new();
 
     public IParserDiagnostics Diagnostics
@@ -143,13 +150,6 @@ private static Solution BuildAdhocSolution(string code, string documentPath)
             SourceText.From(code), filePath: documentPath);
     }
 
-    /// <summary>
-    ///     A small, curated set of framework reference assemblies, resolved once from the runtime
-    ///     directory. Covers the common BCL surface (incl. LINQ) so typical snippets compile; types defined
-    ///     in the snippet itself resolve regardless. Callers needing more can extend this later.
-    /// </summary>
-    private static readonly MetadataReference[] FrameworkReferences = BuildFrameworkReferences();
-
     private static MetadataReference[] BuildFrameworkReferences()
     {
         var coreDirectory = Path.GetDirectoryName(typeof(object).Assembly.Location)!;
@@ -262,7 +262,7 @@ private static void InsertGlobalNamespaceIfUsed(CodeGraph.Graph.CodeGraph codeGr
 
                 var id = Guid.NewGuid().ToString();
                 var fullName = assembly.FullName + "." + global;
-                var globalNs = new CodeElement(id, CodeElementType.Namespace, global, fullName, assembly);
+                var globalNs = new CodeElement(id, CodeElementType.Namespace, global, fullName, assembly) { IsExternal = assembly.IsExternal };
                 newGlobalNamespaces.Add(globalNs);
 
                 assembly.Children.Add(globalNs);

CSharpCodeAnalyst.sln

@@ -38,6 +38,22 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CSharpCodeAnalyst.History",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CSharpCodeAnalyst.Contracts", "CSharpCodeAnalyst.Contracts\CSharpCodeAnalyst.Contracts.csproj", "{9DE77B88-294B-45F2-B1A1-6642CC3B4137}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "ThirdParty", "ThirdParty", "{356D9C46-07F5-7F13-4EEF-5DD22B885BE8}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.Analyzer.Model", "ThirdParty\DsmSuite\DsmSuite.Analyzer.Model\DsmSuite.Analyzer.Model.csproj", "{42652074-77DD-4502-9EF6-D51EBB72A918}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.Common.Model", "ThirdParty\DsmSuite\DsmSuite.Common.Model\DsmSuite.Common.Model.csproj", "{4F8EA064-AF33-4973-A63A-6984CA7C5DF8}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.Common.Util", "ThirdParty\DsmSuite\DsmSuite.Common.Util\DsmSuite.Common.Util.csproj", "{FE8B79B8-497F-4939-B07A-6546994DC9EF}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.DsmViewer.Application", "ThirdParty\DsmSuite\DsmSuite.DsmViewer.Application\DsmSuite.DsmViewer.Application.csproj", "{3C96864B-93C5-4D75-87FC-98D00A84E32F}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.DsmViewer.Model", "ThirdParty\DsmSuite\DsmSuite.DsmViewer.Model\DsmSuite.DsmViewer.Model.csproj", "{D912F0E9-D8C1-43ED-B3DD-F4413AF366AB}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.DsmViewer.View", "ThirdParty\DsmSuite\DsmSuite.DsmViewer.View\DsmSuite.DsmViewer.View.csproj", "{9421A097-A4E6-496B-B782-DAB1E819DD0D}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DsmSuite.DsmViewer.ViewModel", "ThirdParty\DsmSuite\DsmSuite.DsmViewer.ViewModel\DsmSuite.DsmViewer.ViewModel.csproj", "{A9B11DC9-D36F-48DD-87E8-1C6E547EED5E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -168,10 +184,103 @@ Global
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 		{9DE77B88-294B-45F2-B1A1-6642CC3B4137}.Release|x86.Build.0 = Release|Any CPU
+		{42652074-77DD-4502-9EF6-D51EBB72A918}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{42652074-77DD-4502-9EF6-D51EBB72A918}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{42652074-77DD-4502-9EF6-D51EBB72A918}.Debug|x64.ActiveCfg = Debug|Any CPU
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 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
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 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {2BBCF792-C019-4195-AF08-45CC642B8A18}
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CSharpCodeAnalyst/App.xaml

@@ -1,7 +1,28 @@
 <Application x:Class="CSharpCodeAnalyst.App"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:themes="clr-namespace:DsmSuite.DsmViewer.View.Resources.Themes;assembly=DsmSuite.DsmViewer.View">
     <Application.Resources>
-
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <!--
+                  Resources of the vendored DsmSuite matrix view (see ThirdParty/DsmSuite). Its controls
+                  resolve these via StaticResource, so they have to live at application scope. Every style
+                  in here is keyed, so nothing bleeds into the rest of the application.
+                -->
+                <ResourceDictionary Source="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Themes/LightTheme.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Converters.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Icons.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/ControlTemplates.xaml" />
+                <ResourceDictionary Source="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Style.xaml" />
+                <themes:ThemeResourceDictionary
+                    DarkThemeSource="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Themes/DarkTheme.xaml"
+                    PastelThemeSource="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Themes/PastelTheme.xaml"
+                    LightThemeSource="pack://application:,,,/DsmSuite.DsmViewer.View;component/Resources/Themes/LightTheme.xaml" />
+
+                <!-- Our restyling of the matrix. Must stay last: it wins by overriding the keys above. -->
+                <ResourceDictionary Source="Features/DsmMatrix/DsmMatrixTheme.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
     </Application.Resources>
 </Application>

CSharpCodeAnalyst/CSharpCodeAnalyst.csproj

@@ -158,6 +158,10 @@
         <ProjectReference Include="..\CSharpCodeAnalyst.History\CSharpCodeAnalyst.History.csproj" />
         <ProjectReference Include="..\CSharpCodeAnalyst.TreeMap\CSharpCodeAnalyst.TreeMap.csproj" />
         <ProjectReference Include="..\CSharpCodeAnalyst.Contracts\CSharpCodeAnalyst.Contracts.csproj" />
+        <ProjectReference Include="..\ThirdParty\DsmSuite\DsmSuite.DsmViewer.View\DsmSuite.DsmViewer.View.csproj" />
+        <ProjectReference Include="..\ThirdParty\DsmSuite\DsmSuite.DsmViewer.ViewModel\DsmSuite.DsmViewer.ViewModel.csproj" />
+        <ProjectReference Include="..\ThirdParty\DsmSuite\DsmSuite.DsmViewer.Application\DsmSuite.DsmViewer.Application.csproj" />
+        <ProjectReference Include="..\ThirdParty\DsmSuite\DsmSuite.DsmViewer.Model\DsmSuite.DsmViewer.Model.csproj" />
     </ItemGroup>