WIP: Cycle prompt history

lua/telescope/actions/init.lua

@@ -4,11 +4,50 @@ local a = vim.api
 
 local log = require('telescope.log')
 local path = require('telescope.path')
+local ppath = require('plenary.path')
 local state = require('telescope.state')
 local utils = require('telescope.utils')
 
 local transform_mod = require('telescope.actions.mt').transform_mod
 
+local conf = require('telescope.config').values
+
+local history_cache
+local gen_history_cache = function()
+ if not history_cache then
+ history_cache = {}
+ local p = ppath:new(vim.fn.expand(conf.telescope_history))
+ if not p:exists() then p:touch({ parents = true }) end
+ history_cache.path = p
+ end
+end
+
+local ensure_history = function()
+ if not conf.telescope_history then return end
+ gen_history_cache()
+ if not history_cache.content then
+ history_cache.content = history_cache.path:readlines()
+ table.remove(history_cache.content, table.getn(history_cache.content))
+ history_cache.index = table.getn(history_cache.content) + 1
+ end
+ return true
+end
+
+local append_to_history = function(line)
+ if not conf.telescope_history then return end
+ gen_history_cache()
+ ensure_history()
+ -- TODO(conni2461): WINDOWS? :sob:
+ if line ~= '' then
+ line = line .. '\n'
+ if history_cache.content[table.getn(history_cache.content)] ~= line then
+ history_cache.path:write_text(line, 'a')
+ end
+ end
+ history_cache.content = nil
+ history_cache.index = nil
+end
+
 local actions = setmetatable({}, {
  __index = function(_, k)
  error("Actions does not have a value: " .. tostring(k))
@@ -68,7 +107,8 @@ end
 
 -- TODO: It seems sometimes we get bad styling.
 function actions._goto_file_selection(prompt_bufnr, command)
- local entry = actions.get_selected_entry(prompt_bufnr)
+ local entry = actions.get_selected_entry()
+ append_to_history(actions.get_current_line())
 
  if not entry then
  print("[telescope] Nothing currently selected")
@@ -322,6 +362,28 @@ actions.send_to_qflist = function(prompt_bufnr)
  vim.fn.setqflist(qf_entries, 'r')
 end
 
+actions.cycle_history_next = function(prompt_bufnr)
+ if not ensure_history() then return end
+ local current_picker = actions.get_current_picker(prompt_bufnr)
+ local next_idx = history_cache.index + 1
+ if next_idx <= table.getn(history_cache.content) then
+ history_cache.index = next_idx
+ current_picker:reset_prompt()
+ current_picker:set_prompt(history_cache.content[next_idx]:sub(1, -2))
+ end
+end
+
+actions.cycle_history_prev = function(prompt_bufnr)
+ if not ensure_history() then return end
+ local current_picker = actions.get_current_picker(prompt_bufnr)
+ local next_idx = history_cache.index - 1
+ if next_idx >= 1 then
+ history_cache.index = next_idx
+ current_picker:reset_prompt()
+ current_picker:set_prompt(history_cache.content[next_idx])
+ end
+end
+
 actions.open_qflist = function(_)
  vim.cmd [[copen]]
 end

lua/telescope/config.lua

@@ -97,6 +97,7 @@ function config.set_defaults(defaults)
  set("file_sorter", sorters.get_fuzzy_file)
 
  set("file_ignore_patterns", nil)
+ set("telescope_history", nil)
 
  set("file_previewer", function(...) return require('telescope.previewers').cat.new(...) end)
  set("grep_previewer", function(...) return require('telescope.previewers').vimgrep.new(...) end)

lua/telescope/pickers.lua

@@ -516,7 +516,7 @@ function Picker:find()
  pcall(a.nvim_buf_set_option, prompt_bufnr, 'filetype', 'TelescopePrompt')
 
  if self.default_text then
- vim.api.nvim_buf_set_lines(prompt_bufnr, 0, 1, false, {self.default_text})
+ self:set_prompt(self.default_text)
  end
 
  if self.initial_mode == "insert" then
@@ -531,6 +531,25 @@ function Picker:hide_preview()
  -- 2. Resize prompt & results windows accordingly
 end
 
+function Picker:reset_prompt()
+ vim.api.nvim_buf_set_lines(self.prompt_bufnr, 0, -1, false, {})
+ if self.prompt_prefix ~= '' then
+ vim.api.nvim_buf_add_highlight(self.prompt_bufnr,
+ ns_telescope_prompt_prefix,
+ 'TelescopePromptPrefix',
+ 0,
+ 0,
+ #self.prompt_prefix
+ )
+ end
+end
+
+function Picker:set_prompt(str)
+ -- TODO(conni2461): As soon as prompt_buffers are fix use this:
+ -- vim.api.nvim_buf_set_lines(self.prompt_bufnr, 0, 1, false, { str })
+ -- vim.api.nvim_buf_set_text(self.prompt_bufnr, 0, 0, 0, #str, { str })
+ vim.api.nvim_feedkeys(str, 'n', false)
+end
 
 function Picker.close_windows(status)
  local prompt_win = status.prompt_win