Streamed some refactoring. More work to do

lua/telescope/mappings.lua

@@ -1,12 +1,10 @@
 -- TODO: Customize keymap
 local a = vim.api
-local ns_telescope_selection = a.nvim_create_namespace('telescope_selection')
 
 local state = require('telescope.state')
 
 local mappings = {}
 local keymap = {}
-local telescope_selections = {}
 
 mappings.set_keymap = function(prompt_bufnr, results_bufnr)
   local function default_mapper(map_key, table_key)
@@ -31,31 +29,8 @@ mappings.set_keymap = function(prompt_bufnr, results_bufnr)
   default_mapper('<CR>', 'enter')
 end
 
-local function update_current_selection(prompt_bufnr, results_bufnr, row)
-  local status = state.get_status(prompt_bufnr)
-
-  a.nvim_buf_clear_namespace(results_bufnr, ns_telescope_selection, 0, -1)
-  a.nvim_buf_add_highlight(
-    results_bufnr,
-    ns_telescope_selection,
-    'Error',
-    row,
-    0,
-    -1
-  )
-
-  telescope_selections[prompt_bufnr] = row
-
-  if status.previewer then
-    vim.g.got_here = true
-
-    status.previewer:preview(
-      status.preview_win,
-      status.preview_bufnr,
-      status.results_bufnr,
-      row
-    )
-  end
+local function update_current_selection(prompt_bufnr, change)
+  state.get_status(prompt_bufnr).picker:move_selection(change)
 end
 
 
@@ -68,34 +43,16 @@ end
 -- TODO: Refactor this to use shared code.
 -- TODO: Move from top to bottom, etc.
 -- TODO: It seems like doing this brings us back to the beginning of the prompt, which is not great.
-keymap["control-n"] = function(prompt_bufnr, results_bufnr)
-  if telescope_selections[prompt_bufnr] == nil then
-    telescope_selections[prompt_bufnr] = 0
-  end
-
-  local row = telescope_selections[prompt_bufnr] + 1
-  update_current_selection(prompt_bufnr, results_bufnr, row)
+keymap["control-n"] = function(prompt_bufnr, _)
+  update_current_selection(prompt_bufnr, 1)
 end
 
-keymap["control-p"] = function(prompt_bufnr, results_bufnr)
-  if telescope_selections[prompt_bufnr] == nil then
-    telescope_selections[prompt_bufnr] = 0
-  end
-
-  local row = telescope_selections[prompt_bufnr] - 1
-  update_current_selection(prompt_bufnr, results_bufnr, row)
+keymap["control-p"] = function(prompt_bufnr, _)
+  update_current_selection(prompt_bufnr, -1)
 end
 
 keymap["enter"] = function(prompt_bufnr, results_bufnr)
-  local extmark = a.nvim_buf_get_extmarks(
-    results_bufnr,
-    ns_telescope_selection,
-    0,
-    -1,
-    {}
-  )
-
-  local row = extmark[1][2]
+  local row = state.get_status(prompt_bufnr).picker:get_selection()
   if row == nil then
     print("Could not do anything...")
     return
@@ -117,7 +74,9 @@ keymap["enter"] = function(prompt_bufnr, results_bufnr)
     local bufnr = vim.fn.bufnr(filename, true)
     a.nvim_set_current_buf(bufnr)
     a.nvim_buf_set_option(bufnr, 'buflisted', true)
-    a.nvim_win_set_cursor(0, {row, col})
+    if row and col then
+      a.nvim_win_set_cursor(0, {row, col})
+    end
   end
 end