Use FileType event instead of Syntax, call nvim_win_is_valid instead …

…of win > 0

lua/render-markdown/init.lua

@@ -170,7 +170,7 @@ function M.setup(opts)
             end
         end,
     })
-    vim.api.nvim_create_autocmd({ 'FileChangedShellPost', 'Syntax', 'TextChanged' }, {
+    vim.api.nvim_create_autocmd({ 'FileChangedShellPost', 'FileType', 'TextChanged' }, {
         group = group,
         callback = function(event)
             vim.schedule(function()
@@ -179,11 +179,8 @@ function M.setup(opts)
         end,
     })
 
-    vim.api.nvim_create_user_command(
-        'RenderMarkdownToggle',
-        M.toggle,
-        { desc = 'Switch between enabling & disabling render markdown plugin' }
-    )
+    local description = 'Switch between enabling & disabling render markdown plugin'
+    vim.api.nvim_create_user_command('RenderMarkdownToggle', M.toggle, { desc = description })
 end
 
 M.toggle = function()

lua/render-markdown/ui.lua

@@ -28,9 +28,9 @@ M.refresh = function(buf)
     util.set_conceal(buf, state.config.conceal.rendered)
 
     -- Make sure injections are processed
-    vim.treesitter.get_parser(buf):parse(true)
-
-    vim.treesitter.get_parser(buf):for_each_tree(function(tree, language_tree)
+    local parser = vim.treesitter.get_parser(buf)
+    parser:parse(true)
+    parser:for_each_tree(function(tree, language_tree)
         local language = language_tree:lang()
         logger.debug({ language = language })
         if language == 'markdown' then
@@ -58,7 +58,7 @@ M.clear_valid = function(buf)
     end
     vim.api.nvim_buf_clear_namespace(buf, M.namespace, 0, -1)
     local win = util.buf_to_win(buf)
-    if win < 0 then
+    if not vim.api.nvim_win_is_valid(win) then
         return false
     end
     util.set_conceal(buf, state.config.conceal.default)