From caaafd3cf30e6fd5ed4768a880a3fafb5d6b0131 Mon Sep 17 00:00:00 2001
From: gffranco <gffranco@example.com>
Date: Wed, 24 Jun 2026 09:15:09 +0000
Subject: [PATCH] sync: bring Rust crates in line with nuwiki main (v0.4.2)

---
 Cargo.lock                                    |  6 ++---
 Cargo.toml                                    |  2 +-
 .../nuwiki-core/src/syntax/vimwiki/lexer.rs   |  7 +++--
 crates/nuwiki-core/tests/html_renderer.rs     | 21 +++++++++++++++
 crates/nuwiki-core/tests/lexer.rs             | 26 +++++++++++++++++++
 crates/nuwiki-ls/Cargo.toml                   |  2 +-
 crates/nuwiki-lsp/Cargo.toml                  |  2 +-
 7 files changed, 56 insertions(+), 10 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 908616d..f9f4dd9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -376,11 +376,11 @@ checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
 [[package]]
 name = "nuwiki-core"
-version = "0.4.1"
+version = "0.4.2"
 
 [[package]]
 name = "nuwiki-ls"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "nuwiki-lsp",
  "tokio",
@@ -388,7 +388,7 @@ dependencies = [
 
 [[package]]
 name = "nuwiki-lsp"
-version = "0.4.1"
+version = "0.4.2"
 dependencies = [
  "async-trait",
  "dashmap 6.1.0",
diff --git a/Cargo.toml b/Cargo.toml
index c50c4e0..5404298 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ resolver = "2"
 members = ["crates/*"]
 
 [workspace.package]
-version = "0.4.1"
+version = "0.4.2"
 edition = "2021"
 rust-version = "1.83"
 authors = ["Gabriel Fróes Franco <gffranco@gmail.com>"]
diff --git a/crates/nuwiki-core/src/syntax/vimwiki/lexer.rs b/crates/nuwiki-core/src/syntax/vimwiki/lexer.rs
index 12ba237..2d4b1af 100644
--- a/crates/nuwiki-core/src/syntax/vimwiki/lexer.rs
+++ b/crates/nuwiki-core/src/syntax/vimwiki/lexer.rs
@@ -526,10 +526,9 @@ impl<'src> LexState<'src> {
         if level == 0 {
             return false;
         }
-        // Must be followed by at least one space.
-        if leading_ws + level >= bytes.len() || bytes[leading_ws + level] != b' ' {
-            return false;
-        }
+        // vimwiki accepts both spaced (`== H ==`) and spaceless (`==H==`)
+        // headings, so we don't require a space after the opening `=`s. The
+        // title is still trimmed of one optional space per side below.
 
         // Trailing `=`s of the same level.
         let trimmed_end = line.trim_end_matches([' ', '\t']);
diff --git a/crates/nuwiki-core/tests/html_renderer.rs b/crates/nuwiki-core/tests/html_renderer.rs
index 7ab0598..713728e 100644
--- a/crates/nuwiki-core/tests/html_renderer.rs
+++ b/crates/nuwiki-core/tests/html_renderer.rs
@@ -77,6 +77,27 @@ fn centered_heading_gets_centered_class() {
     assert!(out.contains("<h1 class=\"centered\" id=\"T\">T</h1>"));
 }
 
+#[test]
+fn spaceless_heading_renders_as_heading() {
+    // `==Heading==` (no surrounding spaces) is a heading, like vimwiki — not a
+    // literal `<p>==Heading==</p>`.
+    let out = render("==Plain==\n");
+    assert!(
+        out.contains(
+            "<div id=\"Plain\"><h2 id=\"Plain\" class=\"header\">\
+             <a href=\"#Plain\">Plain</a></h2></div>"
+        ),
+        "got: {out}"
+    );
+    // The spaceless + keyword combo from the report: a header, not a badge.
+    let out2 = render("==TODO==\n");
+    assert!(
+        out2.contains("<h2 id=\"TODO\" class=\"header\">"),
+        "got: {out2}"
+    );
+    assert!(!out2.contains("<p>"), "not a paragraph: {out2}");
+}
+
 #[test]
 fn heading_keyword_renders_as_plain_text_not_badge() {
     // `== TODO ==` is a section title, not an inline keyword: it must render as
diff --git a/crates/nuwiki-core/tests/lexer.rs b/crates/nuwiki-core/tests/lexer.rs
index 53a3fcb..b3aab42 100644
--- a/crates/nuwiki-core/tests/lexer.rs
+++ b/crates/nuwiki-core/tests/lexer.rs
@@ -85,6 +85,32 @@ fn centered_heading_is_marked_centered() {
     assert!(matches!(lexed[2], HeadingClose));
 }
 
+#[test]
+fn spaceless_heading_is_a_heading() {
+    // vimwiki accepts `==Heading==` with no spaces around the text.
+    let lexed = lex("==Plain==\n");
+    assert_eq!(
+        lexed,
+        vec![
+            HeadingOpen {
+                level: 2,
+                centered: false
+            },
+            text("Plain"),
+            HeadingClose,
+            Newline,
+        ]
+    );
+}
+
+#[test]
+fn marker_only_or_unbalanced_lines_are_not_headings() {
+    // No title between markers, and trailing `=` not at line end → plain text.
+    assert!(!matches!(lex("======\n")[0], HeadingOpen { .. }));
+    assert!(!matches!(lex("==> arrow\n")[0], HeadingOpen { .. }));
+    assert!(!matches!(lex("==a==b\n")[0], HeadingOpen { .. }));
+}
+
 #[test]
 fn heading_with_inline_bold() {
     let lexed = lex("== Hello *world* ==\n");
diff --git a/crates/nuwiki-ls/Cargo.toml b/crates/nuwiki-ls/Cargo.toml
index 2e3725f..9ee85a7 100644
--- a/crates/nuwiki-ls/Cargo.toml
+++ b/crates/nuwiki-ls/Cargo.toml
@@ -17,5 +17,5 @@ name = "nuwiki-ls"
 path = "src/main.rs"
 
 [dependencies]
-nuwiki-lsp = { path = "../nuwiki-lsp", version = "0.4.1" }
+nuwiki-lsp = { path = "../nuwiki-lsp", version = "0.4.2" }
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "io-std"] }
diff --git a/crates/nuwiki-lsp/Cargo.toml b/crates/nuwiki-lsp/Cargo.toml
index cddea7c..fc35afa 100644
--- a/crates/nuwiki-lsp/Cargo.toml
+++ b/crates/nuwiki-lsp/Cargo.toml
@@ -13,7 +13,7 @@ homepage.workspace = true
 workspace = true
 
 [dependencies]
-nuwiki-core = { path = "../nuwiki-core", version = "0.4.1" }
+nuwiki-core = { path = "../nuwiki-core", version = "0.4.2" }
 tower-lsp = "0.20"
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "io-std", "sync", "fs"] }
 dashmap = "6"