Fancy Header stars in org files

nvim/.config/nvim/fnl/dotfiles/plugin/orgbullets.fnl

@@ -1,3 +1,47 @@
 (module dotfiles.plugin.orgbullets
-  {autoload {org-bullets org-bullets}})
+        {autoload {nvim aniseed.nvim a aniseed.core ts-utils dotfiles.ts-utils}})
 
+(def stars ["◉" "⦾" "○" "✸" "✿" "✶" "•" "‣"])
+
+(def stars-query "(headline (stars) @stars)")
+
+(defn star-index [heading-level]
+      (let [star-count (a.count stars)
+            idx (math.fmod heading-level star-count)]
+        (if (< 0 idx)
+            idx
+            star-count)))
+
+(defonce extmark-namespace (vim.api.nvim_create_namespace :HeaderStars))
+
+(def star-captures (ts-utils.make-query :org stars-query))
+
+(defn gen-star-extmarks []
+      (when (= :org vim.bo.filetype)
+        (let [bufnr (vim.api.nvim_get_current_buf)
+              star-count (a.count stars)]
+          (vim.api.nvim_buf_clear_namespace bufnr extmark-namespace 0 -1)
+          (each [id node metadata (star-captures bufnr)]
+            (let [[start-line start-col end-row end-col] [(node:range)]
+                  heading-level (if (= start-line end-row)
+                                    (- end-col start-col))
+                  star (a.get stars (star-index heading-level))
+                  replacement (string.format (a.str "%" (+ 2 heading-level) :s)
+                                             star)]
+              (vim.api.nvim_buf_set_extmark bufnr extmark-namespace start-line
+                                            start-col
+                                            {:end_col end-col
+                                             :end_row end-row
+                                             :virt_text [[replacement []]]
+                                             :virt_text_pos :overlay
+                                             :hl_mode :combine}))))))
+
+(let [group (nvim.create_augroup :HeaderStars {:clear true})]
+  (nvim.create_autocmd [:FileChangedShellPost
+                        :Syntax
+                        :TextChanged
+                        :InsertLeave
+                        :WinScrolled]
+                       {: group
+                        ;; :pattern [:*.org]
+                        :callback gen-star-extmarks}))

nvim/.config/nvim/fnl/dotfiles/plugin/orgmode.fnl

@@ -1,8 +1,8 @@
-(module dotfiles.plugin.orgmode
-  {autoload {orgmode orgmode}})
+(module dotfiles.plugin.orgmode {autoload {orgmode orgmode}})
 
 (orgmode.setup_ts_grammar)
 
-(orgmode.setup
-  {:org_agenda_files ["~/Dropbox/org/*" "~/my-orgs/**/*"]
+(orgmode.setup {:org_agenda_files ["~/Dropbox/org/*" "~/my-orgs/**/*"]
                 :org_default_notes_file "~/Dropbox/org/refile.org"})
+
+(require :dotfiles.plugin.orgbullets)

nvim/.config/nvim/fnl/dotfiles/plugins.fnl

@@ -22,7 +22,6 @@
                 :Olical/conjure {:mod :conjure}
                 :Olical/fennel.vim {}
                 :airblade/vim-gitgutter {}
-                :akinsho/org-bullets.nvim {:mod :orgbullets}
                 :clojure-vim/vim-jack-in {}
                 :dhruvasagar/vim-table-mode {}
                 :folke/lsp-colors.nvim {}

nvim/.config/nvim/fnl/dotfiles/ts-utils.fnl

@@ -0,0 +1,12 @@
+(module dotfiles.ts-utils {autoload {nvim aniseed.nvim a aniseed.core}})
+
+(defn root [bufnr lang] (let [parser (vim.treesitter.get_parser bufnr lang {})
+                              tree (a.first (: parser :parse))]
+                          (: tree :root)))
+
+(defn make-query [lang query-string]
+      (let [query (vim.treesitter.parse_query lang "(headline (stars) @stars)")]
+        (fn [bufnr]
+          (let [root-node (root bufnr lang)
+                iter-captures (query.iter_captures query root-node bufnr 0 -1)]
+            iter-captures))))