kakoune improvements

maddie/common/kakoune.nix

@@ -40,9 +40,36 @@
       pkgs.kak-lsp
     ];
     extraConfig = ''
+      # Tabs
       hook global InsertChar \t %{ exec -draft h@ }
+      add-highlighter global/ show-whitespaces -tab '│' -tabpad '╌'
+
+      # Kak-LSP
       eval %sh{kak-lsp --kakoune -s $kak_session}
       lsp-enable
+
+      # Modeline
+      declare-option bool lsp_enabled false
+      declare-option -hidden str lsp_modeline_progress ""
+      define-command -hidden -params 6 -override lsp-handle-progress %{
+        set-option global lsp_modeline_progress %sh{
+            if ! "$6"; then
+                echo "$2\$\{5:+" ($5%)"}\$\{4:+": $4"}"
+            fi
+        }
+      }
+
+      declare-option -hidden str modeline_git_branch
+      hook global WinDisplay .* %{
+        set-option window modeline_git_branch %sh{
+            branch=$(git -C "\$\{kak_buffile%/*}" rev-parse --abbrev-ref HEAD 2>/dev/null)
+            if [ -n "$branch" ]; then
+                printf "$branch "
+            fi
+        }
+      }
+
+      set-option global modelinefmt '%opt{lsp_modeline_progress} {StatusLine}{string}%opt{modeline_git_branch}{type}%sh{ [ -n "$kak_opt_filetype" ] && echo "$kak_opt_filetype " }{default}%val{bufname}{{context_info}}{default} {{mode_info}} {meta}%val{cursor_line}:%val{cursor_char_column}'
     '';
   };
 }