fix(widgets): table row selection shows full background color

When selection_mode = Row, the entire row should display the selection
background color. Previously, only the vertical border characters (│)
showed the selection color because:

1. assemble_columns() applied themed_border to each vline separator
2. Each themed_border adds ANSI codes with \033[0m reset suffix
3. themed_selection wraps the assembled row, but reset codes inside
   clear the selection background
4. Result: only vlines show selection; cell content loses background

Fix: Pass ~is_selected flag to assemble_columns. When true, vlines are
rendered without themed_border styling, allowing them to inherit the
selection background applied to the full row.

This affects both wrapped and non-wrapped table rendering paths.

BREAKING CHANGE: Bumps version to 0.4.1 for bug fix release.

Author: vch9

.github/workflows/ci.yml

@@ -16,6 +16,8 @@ jobs:
       - uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: 5.3.0
+      - name: Pin external dependencies
+        run: opam pin add ppx_forbid git+https://github.com/atacama-dev/ppx_forbid.git --no-action
       - name: Install dependencies
         run: opam install --deps-only --with-test -y .
       - name: Build & test

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.4.1] - Unreleased
 
+### Fixed
+
+- **Table row selection highlighting**: Full row background now displays correctly when `selection_mode = Row`. Previously, only border characters (vertical separators) showed the selection color due to ANSI reset codes from `themed_border` clearing the selection background. Now, border styling is skipped for selected rows, allowing the full row to inherit the selection background color.
+
+## [0.4.0] - Unreleased
+
 ### Breaking Changes
 
 - **Box_widget border style**: added `None_` to `Box_widget.border_style` for borderless containers. Pattern matches on `border_style` may need a new case.

example/demos/table/page.ml

@@ -60,14 +60,7 @@ module Inner = struct
         "↑/↓ to move • Enter logs the selection • t opens tutorial • Esc \
          returns"
     in
-    let body =
-      Miaou_widgets_display.Table_widget.render_table_80
-        ~cols:(Some 80)
-        ~header:("Name", "Score", "Status")
-        ~rows:s.table.rows
-        ~cursor:s.table.cursor
-        ~sel_col:0
-    in
+    let body = Miaou_widgets_display.Table_widget.Table.render s.table in
     header ^ "\n\n" ^ body
 
   let log_selection table =

src/miaou_widgets_display/table_widget.ml

@@ -271,9 +271,12 @@ let render_table_generic_with_opts ?backend ?(wrap = false) ~cols ~header_list
   let blank_for_col =
     List.mapi (fun idx w -> (idx, String.make w ' ')) col_widths
   in
-  let assemble_columns cols =
+  let assemble_columns ~is_selected cols =
     let buf = Buffer.create inner_w in
-    let vline = W.themed_border glyphs.vline in
+    (* When row is selected, don't style vlines - let them inherit selection bg *)
+    let vline =
+      if is_selected then glyphs.vline else W.themed_border glyphs.vline
+    in
     Buffer.add_string buf vline ;
     List.iteri
       (fun idx col ->
@@ -296,7 +299,10 @@ let render_table_generic_with_opts ?backend ?(wrap = false) ~cols ~header_list
             ^ String.make copts.pad_right ' ')
           cols_cells
       in
-      let line_core = assemble_columns cells in
+      let is_selected =
+        match opts.selection_mode with Row when i = cursor -> true | _ -> false
+      in
+      let line_core = assemble_columns ~is_selected cells in
       let line =
         match opts.selection_mode with
         | Row when i = cursor -> W.themed_selection line_core
@@ -347,7 +353,12 @@ let render_table_generic_with_opts ?backend ?(wrap = false) ~cols ~header_list
                   | None -> ""))
             padded_lines
         in
-        let line_core = assemble_columns cols_for_idx in
+        let is_selected =
+          match opts.selection_mode with
+          | Row when i = cursor -> true
+          | _ -> false
+        in
+        let line_core = assemble_columns ~is_selected cols_for_idx in
         let line =
           match opts.selection_mode with
           | Row when i = cursor -> W.themed_selection line_core