feat: Add a configuration option to treat level 1 headings as title

Previously, "level 1 heading = title" was the default. Now there's a toggle for this.

The config option is not wired yet. This will be done separately.

Marksman/Config.fs

@@ -128,6 +128,7 @@ type Config = {
     caCreateMissingFileEnable: option<bool>
     coreMarkdownFileExtensions: option<array<string>>
     coreTextSync: option<TextSync>
+    coreTitleFromHeading: option<bool>
     coreIncrementalReferences: option<bool>
     coreParanoid: option<bool>
     complWikiStyle: option<ComplWikiStyle>
@@ -139,6 +140,7 @@ type Config = {
         caCreateMissingFileEnable = Some true
         coreMarkdownFileExtensions = Some [| "md"; "markdown" |]
         coreTextSync = Some Full
+        coreTitleFromHeading = Some true
         coreIncrementalReferences = Some false
         coreParanoid = Some false
         complWikiStyle = Some TitleSlug
@@ -150,6 +152,7 @@ type Config = {
         caCreateMissingFileEnable = None
         coreMarkdownFileExtensions = None
         coreTextSync = None
+        coreTitleFromHeading = None
         coreIncrementalReferences = None
         coreParanoid = None
         complWikiStyle = None
@@ -176,6 +179,11 @@ type Config = {
         |> Option.orElse Config.Default.coreTextSync
         |> Option.get
 
+    member this.CoreTitleFromHeading() =
+        this.coreTitleFromHeading
+        |> Option.orElse Config.Default.coreTitleFromHeading
+        |> Option.get
+
     member this.CoreIncrementalReferences() =
         this.coreIncrementalReferences
         |> Option.orElse Config.Default.coreIncrementalReferences
@@ -187,9 +195,13 @@ type Config = {
         |> Option.get
 
     member this.ComplWikiStyle() =
-        this.complWikiStyle
-        |> Option.orElse Config.Default.complWikiStyle
-        |> Option.get
+        match this.complWikiStyle with
+        | Some x -> x
+        | None ->
+            if this.CoreTitleFromHeading() then
+                Option.get Config.Default.complWikiStyle
+            else
+                ComplWikiStyle.FileStem
 
     member this.ComplCandidates() =
         this.complCandidates
@@ -209,6 +221,8 @@ let private configOfTable (table: TomlTable) : LookupResult<Config> =
         let! coreTextSync = getFromTableOpt<string> table [] [ "core"; "text_sync" ]
         let coreTextSync = coreTextSync |> Option.bind TextSync.ofStringOpt
 
+        let! coreTitleFromHeading = getFromTableOpt<bool> table [] [ "core"; "title_from_heading" ]
+
         let! coreIncrementalReferences =
             getFromTableOpt<bool> table [] [ "core"; "incremental_references" ]
 
@@ -239,6 +253,7 @@ let private configOfTable (table: TomlTable) : LookupResult<Config> =
             caCreateMissingFileEnable = caCreateMissingFileEnable
             coreMarkdownFileExtensions = coreMarkdownFileExtensions
             coreTextSync = coreTextSync
+            coreTitleFromHeading = coreTitleFromHeading
             coreIncrementalReferences = coreIncrementalReferences
             coreParanoid = coreParanoid
             complWikiStyle = complWikiStyle
@@ -258,6 +273,7 @@ module Config =
             hi.coreMarkdownFileExtensions
             |> Option.orElse low.coreMarkdownFileExtensions
         coreTextSync = hi.coreTextSync |> Option.orElse low.coreTextSync
+        coreTitleFromHeading = hi.coreTitleFromHeading |> Option.orElse low.coreTitleFromHeading
         coreIncrementalReferences =
             hi.coreIncrementalReferences
             |> Option.orElse low.coreIncrementalReferences

Tests/ConfigTests.fs

@@ -2,6 +2,7 @@ module Marksman.ConfigTests
 
 open System.IO
 open System.Reflection
+open FSharpPlus.Data.Validation
 open Xunit
 
 open Marksman.Config
@@ -189,3 +190,18 @@ let testDefault () =
     let content = using (new StreamReader(content)) (fun f -> f.ReadToEnd())
     let parsed = Config.tryParse content
     Assert.Equal(Some Config.Default, parsed)
+
+[<Fact>]
+let testDefault_titleVsCompletionStyle () =
+    let content =
+        """
+[core]
+title_from_heading = false
+"""
+
+    let actual =
+        Config.tryParse content
+        |> Option.defaultWith (fun () -> failwith "Expected a successful parse")
+
+    Assert.False(actual.CoreTitleFromHeading())
+    Assert.Equal(ComplWikiStyle.FileStem, actual.ComplWikiStyle())

Tests/default.marksman.toml

@@ -17,6 +17,11 @@ markdown.file_extensions = ["md", "markdown"]
 # sync which result in slightly correpted state and are really hard
 # to diagnose.
 text_sync = "full"
+# When set to true, level 1 headings will be treated as document titles
+# (this includes an assumption of having a single title in the document).
+# Setting this to false automatically changes the default wiki link 
+# completion style to a file-based one.
+title_from_heading = true
 # Use incremental resolution of project-wide references.
 # This is much more efficient but is currently experimental
 incremental_references = false