Work on ngram sorter

lua/telescope/previewers.lua

@@ -1,3 +1,5 @@
+local log = require('telescope.log')
+
 local previewers = {}
 
 local Previewer = {}
@@ -21,12 +23,14 @@ end
 
 previewers.vim_buffer = previewers.new {
   preview_fn = function(preview_win, preview_bufnr, results_bufnr, row)
-    assert(preview_bufnr)
-
     local line = vim.api.nvim_buf_get_lines(results_bufnr, row, row + 1, false)[1]
+    if line == nil then
+      return
+    end
     local file_name = vim.split(line, ":")[1]
 
-    -- print(file_name)
+    log.info("Previewing File: %s", file_name)
+
     -- vim.fn.termopen(
     --   string.format("bat --color=always --style=grid %s"),
     -- vim.fn.fnamemodify(file_name, ":p")
@@ -45,6 +49,39 @@ previewers.vim_buffer = previewers.new {
 }
 
 
+previewers.vim_buffer_or_bat = previewers.new {
+  preview_fn = function(preview_win, preview_bufnr, results_bufnr, row)
+    local line = vim.api.nvim_buf_get_lines(results_bufnr, row, row + 1, false)[1]
+    if line == nil then
+      return
+    end
+    local file_name = vim.split(line, ":")[1]
+
+    log.info("Previewing File: %s", file_name)
+
+    -- vim.fn.termopen(
+    --   string.format("bat --color=always --style=grid %s"),
+    -- vim.fn.fnamemodify(file_name, ":p")
+    local bufnr = vim.fn.bufadd(file_name)
+
+    if vim.api.nvim_buf_is_loaded(bufnr) then
+      vim.fn.bufload(bufnr)
+
+      -- TODO: We should probably call something like this because we're not always getting highlight and all that stuff.
+      -- api.nvim_command('doautocmd filetypedetect BufRead ' .. vim.fn.fnameescape(filename))
+      vim.api.nvim_win_set_buf(preview_win, bufnr)
+      vim.api.nvim_win_set_option(preview_win, 'wrap', false)
+      vim.api.nvim_win_set_option(preview_win, 'winhl', 'Normal:Normal')
+      -- vim.api.nvim_win_set_option(preview_win, 'winblend', 20)
+      vim.api.nvim_win_set_option(preview_win, 'signcolumn', 'no')
+      vim.api.nvim_win_set_option(preview_win, 'foldlevel', 100)
+    else
+      vim.api.nvim_buf_set_lines(preview_bufnr, 0, -1, false, vim.fn.systemlist(string.format('bat %s', file_name)))
+    end
+  end,
+}
+
+
 previewers.Previewer = Previewer
 
 return previewers