Register finder (#275)

builtin: Registers finder. view and edit vim registers.

README.md

@@ -374,6 +374,7 @@ Built-in function ready to be bound to any key you like :smile:.
 | `builtin.loclist`                   | Lists items from current window's location list.                 |
 | `builtin.reloader`                  | Lists lua modules and reload them on enter.                      |
 | `builtin.vim_options`               | Lists vim options and on enter edit the options value.           |
+| `builtin.registers`                 | Lists vim registers and edit or paste selection.                 |
 | `builtin.keymaps`                   | Lists normal-mode mappings.                                      |
 | `builtin.filetypes`                 | Lists all filetypes.                                             |
 | `builtin.highlights`                | Lists all highlights.                                            |

lua/telescope/actions/init.lua

@@ -169,6 +169,45 @@ actions.set_command_line = function(prompt_bufnr)
   vim.cmd(entry.value)
 end
 
+actions.edit_register = function(prompt_bufnr)
+  local entry = actions.get_selected_entry(prompt_bufnr)
+  local picker = actions.get_current_picker(prompt_bufnr)
+
+  vim.fn.inputsave()
+  local updated_value = vim.fn.input("Edit [" .. entry.value .. "] ❯ ", entry.content)
+  vim.fn.inputrestore()
+  if updated_value ~= entry.content then
+    vim.fn.setreg(entry.value, updated_value)
+    entry.content = updated_value
+  end
+
+  -- update entry in results table
+  -- TODO: find way to redraw finder content
+  for k, v in pairs(picker.finder.results) do
+    if v == entry then
+      v.content = updated_value
+    end
+  end
+  -- print(vim.inspect(picker.finder.results))
+end
+
+actions.paste_register = function(prompt_bufnr)
+  local entry = actions.get_selected_entry(prompt_bufnr)
+
+  actions.close(prompt_bufnr)
+
+  -- ensure that the buffer can be written to
+  if vim.api.nvim_buf_get_option(vim.api.nvim_get_current_buf(), "modifiable") then
+    print("Paste!")
+    -- substitute "^V" for "b"
+    local reg_type = vim.fn.getregtype(entry.value)
+    if reg_type:byte(1, 1) == 0x16 then
+      reg_type = "b" .. reg_type:sub(2, -1)
+    end
+    vim.api.nvim_put({entry.content}, reg_type, true, true)
+  end
+end
+
 actions.run_builtin = function(prompt_bufnr)
   local entry = actions.get_selected_entry(prompt_bufnr)
 

lua/telescope/builtin/init.lua

@@ -788,7 +788,7 @@ builtin.man_pages = function(opts)
   end
 
   pickers.new(opts, {
-    prompt_tile = 'Man',
+    prompt_title = 'Man',
     finder    = finders.new_table {
       results = lines,
       entry_maker = make_entry.gen_from_apropos(opts),
@@ -859,6 +859,38 @@ builtin.marks = function(opts)
   }):find()
 end
 
+builtin.registers = function(opts)
+  opts = opts or {}
+
+  local registers_table = {"\"", "_", "#", "=", "_", "/", "*", "+", ":", ".", "%"}
+
+  -- named
+  for i = 0, 9 do
+    table.insert(registers_table, tostring(i))
+  end
+
+  -- alphabetical
+  for i = 65, 90 do
+    table.insert(registers_table, string.char(i))
+  end
+
+  pickers.new(opts,{
+    prompt_title = 'Registers',
+    finder = finders.new_table {
+      results = registers_table,
+      entry_maker = make_entry.gen_from_registers(opts),
+    },
+    -- use levenshtein as n-gram doesn't support <2 char matches
+    sorter = sorters.get_levenshtein_sorter(),
+    attach_mappings = function(_, map)
+      map('i', '<CR>', actions.paste_register)
+      map('i', '<C-e>', actions.edit_register)
+
+      return true
+    end,
+  }):find()
+end
+
 -- find normal mode mappings
 builtin.keymaps = function(opts)
   opts = opts or {}

lua/telescope/make_entry.lua

@@ -453,6 +453,33 @@ function make_entry.gen_from_marks(_)
   end
 end
 
+function make_entry.gen_from_registers(_)
+  local displayer = entry_display.create {
+    separator = ":",
+    items = {
+      { width = 4 },
+      { remaining = true },
+    },
+  }
+
+  local make_display = function(entry)
+    return displayer {
+      string.format("[%s]", entry.value),
+      entry.content
+    }
+  end
+
+  return function(entry)
+    return {
+      valid = true,
+      value = entry,
+      ordinal = entry,
+      content = vim.fn.getreg(entry),
+      display = make_display
+    }
+  end
+end
+
 function make_entry.gen_from_highlights()
   return function(entry)
     local make_display = function(entry)
@@ -475,11 +502,13 @@ function make_entry.gen_from_highlights()
       ordinal = entry,
 
       preview_command = preview_command
+
     }
   end
 end
 
 function make_entry.gen_from_vimoptions()
+
   -- TODO: Can we just remove this from `options.lua`?
   function N_(s)
     return s
@@ -546,7 +575,6 @@ function make_entry.gen_from_vimoptions()
     end
   end
 
-  -- TODO: don't call this 'line'
   local displayer = entry_display.create {
     separator = "│",
     items = {